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+//========================================================================
+//
+// Splash.cc
+//
+//========================================================================
+
+//========================================================================
+//
+// Modified under the Poppler project - http://poppler.freedesktop.org
+//
+// All changes made under the Poppler project to this file are licensed
+// under GPL version 2 or later
+//
+// Copyright (C) 2005-2015 Albert Astals Cid <aacid@kde.org>
+// Copyright (C) 2005 Marco Pesenti Gritti <mpg@redhat.com>
+// Copyright (C) 2010-2014 Thomas Freitag <Thomas.Freitag@alfa.de>
+// Copyright (C) 2010 Christian Feuersänger <cfeuersaenger@googlemail.com>
+// Copyright (C) 2011-2013, 2015 William Bader <williambader@hotmail.com>
+// Copyright (C) 2012 Markus Trippelsdorf <markus@trippelsdorf.de>
+// Copyright (C) 2012 Adrian Johnson <ajohnson@redneon.com>
+// Copyright (C) 2012 Matthias Kramm <kramm@quiss.org>
+//
+// To see a description of the changes please see the Changelog file that
+// came with your tarball or type make ChangeLog if you are building from git
+//
+//========================================================================
+
+#include <config.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <assert.h>
+#include <math.h>
+#include "goo/gmem.h"
+#include "goo/GooLikely.h"
+#include "goo/GooList.h"
+#include "poppler/Error.h"
+#include "SplashErrorCodes.h"
+#include "SplashMath.h"
+#include "SplashBitmap.h"
+#include "SplashState.h"
+#include "SplashPath.h"
+#include "SplashXPath.h"
+#include "SplashXPathScanner.h"
+#include "SplashPattern.h"
+#include "SplashScreen.h"
+#include "SplashFont.h"
+#include "SplashGlyphBitmap.h"
+#include "Splash.h"
+#include <algorithm>
+
+//------------------------------------------------------------------------
+
+#define splashAAGamma 1.5
+
+// distance of Bezier control point from center for circle approximation
+// = (4 * (sqrt(2) - 1) / 3) * r
+#define bezierCircle ((SplashCoord)0.55228475)
+#define bezierCircle2 ((SplashCoord)(0.5 * 0.55228475))
+
+// Divide a 16-bit value (in [0, 255*255]) by 255, returning an 8-bit result.
+static inline Guchar div255(int x) {
+ return (Guchar)((x + (x >> 8) + 0x80) >> 8);
+}
+
+// Clip x to lie in [0, 255].
+static inline Guchar clip255(int x) {
+ return x < 0 ? 0 : x > 255 ? 255 : x;
+}
+
+template<typename T>
+inline void Guswap( T&a, T&b ) { T tmp = a; a=b; b=tmp; }
+
+// The PDF spec says that all pixels whose *centers* lie within the
+// image target region get painted, so we want to round n+0.5 down to
+// n. But this causes problems, e.g., with PDF files that fill a
+// rectangle with black and then draw an image to the exact same
+// rectangle, so we instead use the fill scan conversion rule.
+// However, the correct rule works better for glyphs, so we also
+// provide that option in fillImageMask.
+#if 0
+static inline int imgCoordMungeLower(SplashCoord x) {
+ return splashCeil(x + 0.5) - 1;
+}
+static inline int imgCoordMungeUpper(SplashCoord x) {
+ return splashCeil(x + 0.5) - 1;
+}
+#else
+static inline int imgCoordMungeLower(SplashCoord x) {
+ return splashFloor(x);
+}
+static inline int imgCoordMungeUpper(SplashCoord x) {
+ return splashFloor(x) + 1;
+}
+static inline int imgCoordMungeLowerC(SplashCoord x, GBool glyphMode) {
+ return glyphMode ? (splashCeil(x + 0.5) - 1) : splashFloor(x);
+}
+static inline int imgCoordMungeUpperC(SplashCoord x, GBool glyphMode) {
+ return glyphMode ? (splashCeil(x + 0.5) - 1) : (splashFloor(x) + 1);
+}
+#endif
+
+// Used by drawImage and fillImageMask to divide the target
+// quadrilateral into sections.
+struct ImageSection {
+ int y0, y1; // actual y range
+ int ia0, ia1; // vertex indices for edge A
+ int ib0, ib1; // vertex indices for edge A
+ SplashCoord xa0, ya0, xa1, ya1; // edge A
+ SplashCoord dxdya; // slope of edge A
+ SplashCoord xb0, yb0, xb1, yb1; // edge B
+ SplashCoord dxdyb; // slope of edge B
+};
+
+//------------------------------------------------------------------------
+// SplashPipe
+//------------------------------------------------------------------------
+
+#define splashPipeMaxStages 9
+
+struct SplashPipe {
+ // pixel coordinates
+ int x, y;
+
+ // source pattern
+ SplashPattern *pattern;
+
+ // source alpha and color
+ Guchar aInput;
+ GBool usesShape;
+ SplashColorPtr cSrc;
+ SplashColor cSrcVal;
+
+ // non-isolated group alpha0
+ Guchar *alpha0Ptr;
+
+ // knockout groups
+ GBool knockout;
+ Guchar knockoutOpacity;
+
+ // soft mask
+ SplashColorPtr softMaskPtr;
+
+ // destination alpha and color
+ SplashColorPtr destColorPtr;
+ int destColorMask;
+ Guchar *destAlphaPtr;
+
+ // shape
+ Guchar shape;
+
+ // result alpha and color
+ GBool noTransparency;
+ SplashPipeResultColorCtrl resultColorCtrl;
+
+ // non-isolated group correction
+ GBool nonIsolatedGroup;
+
+ // the "run" function
+ void (Splash::*run)(SplashPipe *pipe);
+};
+
+SplashPipeResultColorCtrl Splash::pipeResultColorNoAlphaBlend[] = {
+ splashPipeResultColorNoAlphaBlendMono,
+ splashPipeResultColorNoAlphaBlendMono,
+ splashPipeResultColorNoAlphaBlendRGB,
+ splashPipeResultColorNoAlphaBlendRGB,
+ splashPipeResultColorNoAlphaBlendRGB
+#if SPLASH_CMYK
+ ,
+ splashPipeResultColorNoAlphaBlendCMYK,
+ splashPipeResultColorNoAlphaBlendDeviceN
+#endif
+};
+
+SplashPipeResultColorCtrl Splash::pipeResultColorAlphaNoBlend[] = {
+ splashPipeResultColorAlphaNoBlendMono,
+ splashPipeResultColorAlphaNoBlendMono,
+ splashPipeResultColorAlphaNoBlendRGB,
+ splashPipeResultColorAlphaNoBlendRGB,
+ splashPipeResultColorAlphaNoBlendRGB
+#if SPLASH_CMYK
+ ,
+ splashPipeResultColorAlphaNoBlendCMYK,
+ splashPipeResultColorAlphaNoBlendDeviceN
+#endif
+};
+
+SplashPipeResultColorCtrl Splash::pipeResultColorAlphaBlend[] = {
+ splashPipeResultColorAlphaBlendMono,
+ splashPipeResultColorAlphaBlendMono,
+ splashPipeResultColorAlphaBlendRGB,
+ splashPipeResultColorAlphaBlendRGB,
+ splashPipeResultColorAlphaBlendRGB
+#if SPLASH_CMYK
+ ,
+ splashPipeResultColorAlphaBlendCMYK,
+ splashPipeResultColorAlphaBlendDeviceN
+#endif
+};
+
+//------------------------------------------------------------------------
+
+static void blendXor(SplashColorPtr src, SplashColorPtr dest,
+ SplashColorPtr blend, SplashColorMode cm) {
+ int i;
+
+ for (i = 0; i < splashColorModeNComps[cm]; ++i) {
+ blend[i] = src[i] ^ dest[i];
+ }
+}
+
+//------------------------------------------------------------------------
+// modified region
+//------------------------------------------------------------------------
+
+void Splash::clearModRegion() {
+ modXMin = bitmap->getWidth();
+ modYMin = bitmap->getHeight();
+ modXMax = -1;
+ modYMax = -1;
+}
+
+inline void Splash::updateModX(int x) {
+ if (x < modXMin) {
+ modXMin = x;
+ }
+ if (x > modXMax) {
+ modXMax = x;
+ }
+}
+
+inline void Splash::updateModY(int y) {
+ if (y < modYMin) {
+ modYMin = y;
+ }
+ if (y > modYMax) {
+ modYMax = y;
+ }
+}
+
+//------------------------------------------------------------------------
+// pipeline
+//------------------------------------------------------------------------
+
+inline void Splash::pipeInit(SplashPipe *pipe, int x, int y,
+ SplashPattern *pattern, SplashColorPtr cSrc,
+ Guchar aInput, GBool usesShape,
+ GBool nonIsolatedGroup,
+ GBool knockout, Guchar knockoutOpacity) {
+ pipeSetXY(pipe, x, y);
+ pipe->pattern = NULL;
+
+ // source color
+ if (pattern) {
+ if (pattern->isStatic()) {
+ pattern->getColor(x, y, pipe->cSrcVal);
+ } else {
+ pipe->pattern = pattern;
+ }
+ pipe->cSrc = pipe->cSrcVal;
+ } else {
+ pipe->cSrc = cSrc;
+ }
+
+ // source alpha
+ pipe->aInput = aInput;
+ pipe->usesShape = usesShape;
+ pipe->shape = 0;
+
+ // knockout
+ pipe->knockout = knockout;
+ pipe->knockoutOpacity = knockoutOpacity;
+
+ // result alpha
+ if (aInput == 255 && !state->softMask && !usesShape &&
+ !state->inNonIsolatedGroup && !nonIsolatedGroup) {
+ pipe->noTransparency = gTrue;
+ } else {
+ pipe->noTransparency = gFalse;
+ }
+
+ // result color
+ if (pipe->noTransparency) {
+ // the !state->blendFunc case is handled separately in pipeRun
+ pipe->resultColorCtrl = pipeResultColorNoAlphaBlend[bitmap->mode];
+ } else if (!state->blendFunc) {
+ pipe->resultColorCtrl = pipeResultColorAlphaNoBlend[bitmap->mode];
+ } else {
+ pipe->resultColorCtrl = pipeResultColorAlphaBlend[bitmap->mode];
+ }
+
+ // non-isolated group correction
+ pipe->nonIsolatedGroup = nonIsolatedGroup;
+
+ // select the 'run' function
+ pipe->run = &Splash::pipeRun;
+ if (!pipe->pattern && pipe->noTransparency && !state->blendFunc) {
+ if (bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleMono1;
+ } else if (bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleMono8;
+ } else if (bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleRGB8;
+ } else if (bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleXBGR8;
+ } else if (bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleBGR8;
+#if SPLASH_CMYK
+ } else if (bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleCMYK8;
+ } else if (bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunSimpleDeviceN8;
+#endif
+ }
+ } else if (!pipe->pattern && !pipe->noTransparency && !state->softMask &&
+ pipe->usesShape &&
+ !(state->inNonIsolatedGroup && alpha0Bitmap->alpha) &&
+ !state->blendFunc && !pipe->nonIsolatedGroup) {
+ if (bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAAMono1;
+ } else if (bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAAMono8;
+ } else if (bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAARGB8;
+ } else if (bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAAXBGR8;
+ } else if (bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAABGR8;
+#if SPLASH_CMYK
+ } else if (bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAACMYK8;
+ } else if (bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) {
+ pipe->run = &Splash::pipeRunAADeviceN8;
+#endif
+ }
+ }
+}
+
+// general case
+void Splash::pipeRun(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alphaI, alphaIm1, alpha0, aResult;
+ SplashColor cSrcNonIso, cDest, cBlend;
+ SplashColorPtr cSrc;
+ Guchar cResult0, cResult1, cResult2, cResult3;
+ int t;
+#if SPLASH_CMYK
+ int cp, mask;
+ Guchar cResult[SPOT_NCOMPS+4];
+#endif
+
+ //----- source color
+
+ // static pattern: handled in pipeInit
+ // fixed color: handled in pipeInit
+
+ // dynamic pattern
+ if (pipe->pattern) {
+ if (!pipe->pattern->getColor(pipe->x, pipe->y, pipe->cSrcVal)) {
+ pipeIncX(pipe);
+ return;
+ }
+#if SPLASH_CMYK
+ if (bitmap->mode == splashModeCMYK8 || bitmap->mode == splashModeDeviceN8) {
+ if (state->fillOverprint && state->overprintMode && pipe->pattern->isCMYK()) {
+ Guint mask = 15;
+ if (pipe->cSrcVal[0] == 0) {
+ mask &= ~1;
+ }
+ if (pipe->cSrcVal[1] == 0) {
+ mask &= ~2;
+ }
+ if (pipe->cSrcVal[2] == 0) {
+ mask &= ~4;
+ }
+ if (pipe->cSrcVal[3] == 0) {
+ mask &= ~8;
+ }
+ state->overprintMask = mask;
+ }
+ }
+#endif
+ }
+
+ if (pipe->noTransparency && !state->blendFunc) {
+
+ //----- write destination pixel
+
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ cResult0 = state->grayTransfer[pipe->cSrc[0]];
+ if (state->screen->test(pipe->x, pipe->y, cResult0)) {
+ *pipe->destColorPtr |= pipe->destColorMask;
+ } else {
+ *pipe->destColorPtr &= ~pipe->destColorMask;
+ }
+ if (!(pipe->destColorMask >>= 1)) {
+ pipe->destColorMask = 0x80;
+ ++pipe->destColorPtr;
+ }
+ break;
+ case splashModeMono8:
+ *pipe->destColorPtr++ = state->grayTransfer[pipe->cSrc[0]];
+ break;
+ case splashModeRGB8:
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ break;
+ case splashModeXBGR8:
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ *pipe->destColorPtr++ = 255;
+ break;
+ case splashModeBGR8:
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ if (state->overprintMask & 1) {
+ pipe->destColorPtr[0] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[0] + state->cmykTransferC[pipe->cSrc[0]], 255) :
+ state->cmykTransferC[pipe->cSrc[0]];
+ }
+ if (state->overprintMask & 2) {
+ pipe->destColorPtr[1] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[1] + state->cmykTransferM[pipe->cSrc[1]], 255) :
+ state->cmykTransferM[pipe->cSrc[1]];
+ }
+ if (state->overprintMask & 4) {
+ pipe->destColorPtr[2] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[2] + state->cmykTransferY[pipe->cSrc[2]], 255) :
+ state->cmykTransferY[pipe->cSrc[2]];
+ }
+ if (state->overprintMask & 8) {
+ pipe->destColorPtr[3] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[3] + state->cmykTransferK[pipe->cSrc[3]], 255) :
+ state->cmykTransferK[pipe->cSrc[3]];
+ }
+ pipe->destColorPtr += 4;
+ break;
+ case splashModeDeviceN8:
+ mask = 1;
+ for (cp = 0; cp < SPOT_NCOMPS + 4; cp ++) {
+ if (state->overprintMask & mask) {
+ pipe->destColorPtr[cp] = state->deviceNTransfer[cp][pipe->cSrc[cp]];
+ }
+ mask <<= 1;
+ }
+ pipe->destColorPtr += (SPOT_NCOMPS+4);
+ break;
+#endif
+ }
+ if (pipe->destAlphaPtr) {
+ *pipe->destAlphaPtr++ = 255;
+ }
+
+ } else {
+
+ //----- read destination pixel
+
+ Guchar *destColorPtr;
+ if (pipe->shape && state->blendFunc && pipe->knockout && alpha0Bitmap != NULL) {
+ destColorPtr = alpha0Bitmap->data + (alpha0Y+pipe->y)*alpha0Bitmap->rowSize;
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ destColorPtr += (alpha0X+pipe->x) / 8;
+ break;
+ case splashModeMono8:
+ destColorPtr += (alpha0X+pipe->x);
+ break;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ destColorPtr += (alpha0X+pipe->x) * 3;
+ break;
+ case splashModeXBGR8:
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+#endif
+ destColorPtr += (alpha0X+pipe->x) * 4;
+ break;
+#if SPLASH_CMYK
+ case splashModeDeviceN8:
+ destColorPtr += (alpha0X+pipe->x) * (SPOT_NCOMPS + 4);
+ break;
+#endif
+ }
+ } else {
+ destColorPtr = pipe->destColorPtr;
+ }
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ cDest[0] = (*destColorPtr & pipe->destColorMask) ? 0xff : 0x00;
+ break;
+ case splashModeMono8:
+ cDest[0] = *destColorPtr;
+ break;
+ case splashModeRGB8:
+ cDest[0] = destColorPtr[0];
+ cDest[1] = destColorPtr[1];
+ cDest[2] = destColorPtr[2];
+ break;
+ case splashModeXBGR8:
+ cDest[0] = destColorPtr[2];
+ cDest[1] = destColorPtr[1];
+ cDest[2] = destColorPtr[0];
+ cDest[3] = 255;
+ break;
+ case splashModeBGR8:
+ cDest[0] = destColorPtr[2];
+ cDest[1] = destColorPtr[1];
+ cDest[2] = destColorPtr[0];
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ cDest[0] = destColorPtr[0];
+ cDest[1] = destColorPtr[1];
+ cDest[2] = destColorPtr[2];
+ cDest[3] = destColorPtr[3];
+ break;
+ case splashModeDeviceN8:
+ for (cp = 0; cp < SPOT_NCOMPS + 4; cp++)
+ cDest[cp] = destColorPtr[cp];
+ break;
+#endif
+ }
+ if (pipe->destAlphaPtr) {
+ aDest = *pipe->destAlphaPtr;
+ } else {
+ aDest = 0xff;
+ }
+
+ //----- source alpha
+
+ if (state->softMask) {
+ if (pipe->usesShape) {
+ aSrc = div255(div255(pipe->aInput * *pipe->softMaskPtr++) *
+ pipe->shape);
+ } else {
+ aSrc = div255(pipe->aInput * *pipe->softMaskPtr++);
+ }
+ } else if (pipe->usesShape) {
+ aSrc = div255(pipe->aInput * pipe->shape);
+ } else {
+ aSrc = pipe->aInput;
+ }
+
+ //----- non-isolated group correction
+
+ if (pipe->nonIsolatedGroup) {
+ // This path is only used when Splash::composite() is called to
+ // composite a non-isolated group onto the backdrop. In this
+ // case, pipe->shape is the source (group) alpha.
+ if (pipe->shape == 0) {
+ // this value will be multiplied by zero later, so it doesn't
+ // matter what we use
+ cSrc = pipe->cSrc;
+ } else {
+ t = (aDest * 255) / pipe->shape - aDest;
+ switch (bitmap->mode) {
+#if SPLASH_CMYK
+ case splashModeDeviceN8:
+ for (cp = 0; cp < SPOT_NCOMPS + 4; cp++)
+ cSrcNonIso[cp] = clip255(pipe->cSrc[cp] +
+ ((pipe->cSrc[cp] - cDest[cp]) * t) / 255);
+ break;
+ case splashModeCMYK8:
+ for (cp = 0; cp < 4; cp++)
+ cSrcNonIso[cp] = clip255(pipe->cSrc[cp] +
+ ((pipe->cSrc[cp] - cDest[cp]) * t) / 255);
+ break;
+#endif
+ case splashModeXBGR8:
+ cSrcNonIso[3] = 255;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ cSrcNonIso[2] = clip255(pipe->cSrc[2] +
+ ((pipe->cSrc[2] - cDest[2]) * t) / 255);
+ cSrcNonIso[1] = clip255(pipe->cSrc[1] +
+ ((pipe->cSrc[1] - cDest[1]) * t) / 255);
+ case splashModeMono1:
+ case splashModeMono8:
+ cSrcNonIso[0] = clip255(pipe->cSrc[0] +
+ ((pipe->cSrc[0] - cDest[0]) * t) / 255);
+ break;
+ }
+ cSrc = cSrcNonIso;
+ // knockout: remove backdrop color
+ if (pipe->knockout && pipe->shape >= pipe->knockoutOpacity) {
+ aDest = 0;
+ }
+ }
+ } else {
+ cSrc = pipe->cSrc;
+ }
+
+ //----- blend function
+
+ if (state->blendFunc) {
+#ifdef SPLASH_CMYK
+ if (bitmap->mode == splashModeDeviceN8) {
+ for (int k = 4; k < 4 + SPOT_NCOMPS; k++) {
+ cBlend[k] = 0;
+ }
+ }
+#endif
+ (*state->blendFunc)(cSrc, cDest, cBlend, bitmap->mode);
+ }
+
+ //----- result alpha and non-isolated group element correction
+
+ if (pipe->noTransparency) {
+ alphaI = alphaIm1 = aResult = 255;
+ } else {
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+
+ // alphaI = alpha_i
+ // alphaIm1 = alpha_(i-1)
+ if (pipe->alpha0Ptr) {
+ alpha0 = *pipe->alpha0Ptr++;
+ alphaI = aResult + alpha0 - div255(aResult * alpha0);
+ alphaIm1 = alpha0 + aDest - div255(alpha0 * aDest);
+ } else {
+ alphaI = aResult;
+ alphaIm1 = aDest;
+ }
+ }
+
+ //----- result color
+
+ cResult0 = cResult1 = cResult2 = cResult3 = 0; // make gcc happy
+
+ switch (pipe->resultColorCtrl) {
+
+ case splashPipeResultColorNoAlphaBlendMono:
+ cResult0 = state->grayTransfer[div255((255 - aDest) * cSrc[0] +
+ aDest * cBlend[0])];
+ break;
+ case splashPipeResultColorNoAlphaBlendRGB:
+ cResult0 = state->rgbTransferR[div255((255 - aDest) * cSrc[0] +
+ aDest * cBlend[0])];
+ cResult1 = state->rgbTransferG[div255((255 - aDest) * cSrc[1] +
+ aDest * cBlend[1])];
+ cResult2 = state->rgbTransferB[div255((255 - aDest) * cSrc[2] +
+ aDest * cBlend[2])];
+ break;
+#if SPLASH_CMYK
+ case splashPipeResultColorNoAlphaBlendCMYK:
+ cResult0 = state->cmykTransferC[div255((255 - aDest) * cSrc[0] +
+ aDest * cBlend[0])];
+ cResult1 = state->cmykTransferM[div255((255 - aDest) * cSrc[1] +
+ aDest * cBlend[1])];
+ cResult2 = state->cmykTransferY[div255((255 - aDest) * cSrc[2] +
+ aDest * cBlend[2])];
+ cResult3 = state->cmykTransferK[div255((255 - aDest) * cSrc[3] +
+ aDest * cBlend[3])];
+ break;
+ case splashPipeResultColorNoAlphaBlendDeviceN:
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = state->deviceNTransfer[cp][div255((255 - aDest) * cSrc[cp] +
+ aDest * cBlend[cp])];
+ break;
+#endif
+
+ case splashPipeResultColorAlphaNoBlendMono:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ } else {
+ cResult0 = state->grayTransfer[((alphaI - aSrc) * cDest[0] +
+ aSrc * cSrc[0]) / alphaI];
+ }
+ break;
+ case splashPipeResultColorAlphaNoBlendRGB:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ } else {
+ cResult0 = state->rgbTransferR[((alphaI - aSrc) * cDest[0] +
+ aSrc * cSrc[0]) / alphaI];
+ cResult1 = state->rgbTransferG[((alphaI - aSrc) * cDest[1] +
+ aSrc * cSrc[1]) / alphaI];
+ cResult2 = state->rgbTransferB[((alphaI - aSrc) * cDest[2] +
+ aSrc * cSrc[2]) / alphaI];
+ }
+ break;
+#if SPLASH_CMYK
+ case splashPipeResultColorAlphaNoBlendCMYK:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ cResult3 = 0;
+ } else {
+ cResult0 = state->cmykTransferC[((alphaI - aSrc) * cDest[0] +
+ aSrc * cSrc[0]) / alphaI];
+ cResult1 = state->cmykTransferM[((alphaI - aSrc) * cDest[1] +
+ aSrc * cSrc[1]) / alphaI];
+ cResult2 = state->cmykTransferY[((alphaI - aSrc) * cDest[2] +
+ aSrc * cSrc[2]) / alphaI];
+ cResult3 = state->cmykTransferK[((alphaI - aSrc) * cDest[3] +
+ aSrc * cSrc[3]) / alphaI];
+ }
+ break;
+ case splashPipeResultColorAlphaNoBlendDeviceN:
+ if (alphaI == 0) {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = 0;
+ } else {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = state->deviceNTransfer[cp][((alphaI - aSrc) * cDest[cp] +
+ aSrc * cSrc[cp]) / alphaI];
+ }
+ break;
+#endif
+
+ case splashPipeResultColorAlphaBlendMono:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ } else {
+ cResult0 = state->grayTransfer[((alphaI - aSrc) * cDest[0] +
+ aSrc * ((255 - alphaIm1) * cSrc[0] +
+ alphaIm1 * cBlend[0]) / 255) /
+ alphaI];
+ }
+ break;
+ case splashPipeResultColorAlphaBlendRGB:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ } else {
+ cResult0 = state->rgbTransferR[((alphaI - aSrc) * cDest[0] +
+ aSrc * ((255 - alphaIm1) * cSrc[0] +
+ alphaIm1 * cBlend[0]) / 255) /
+ alphaI];
+ cResult1 = state->rgbTransferG[((alphaI - aSrc) * cDest[1] +
+ aSrc * ((255 - alphaIm1) * cSrc[1] +
+ alphaIm1 * cBlend[1]) / 255) /
+ alphaI];
+ cResult2 = state->rgbTransferB[((alphaI - aSrc) * cDest[2] +
+ aSrc * ((255 - alphaIm1) * cSrc[2] +
+ alphaIm1 * cBlend[2]) / 255) /
+ alphaI];
+ }
+ break;
+#if SPLASH_CMYK
+ case splashPipeResultColorAlphaBlendCMYK:
+ if (alphaI == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ cResult3 = 0;
+ } else {
+ cResult0 = state->cmykTransferC[((alphaI - aSrc) * cDest[0] +
+ aSrc * ((255 - alphaIm1) * cSrc[0] +
+ alphaIm1 * cBlend[0]) / 255) /
+ alphaI];
+ cResult1 = state->cmykTransferM[((alphaI - aSrc) * cDest[1] +
+ aSrc * ((255 - alphaIm1) * cSrc[1] +
+ alphaIm1 * cBlend[1]) / 255) /
+ alphaI];
+ cResult2 = state->cmykTransferY[((alphaI - aSrc) * cDest[2] +
+ aSrc * ((255 - alphaIm1) * cSrc[2] +
+ alphaIm1 * cBlend[2]) / 255) /
+ alphaI];
+ cResult3 = state->cmykTransferK[((alphaI - aSrc) * cDest[3] +
+ aSrc * ((255 - alphaIm1) * cSrc[3] +
+ alphaIm1 * cBlend[3]) / 255) /
+ alphaI];
+ }
+ break;
+ case splashPipeResultColorAlphaBlendDeviceN:
+ if (alphaI == 0) {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = 0;
+ } else {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = state->deviceNTransfer[cp][((alphaI - aSrc) * cDest[cp] +
+ aSrc * ((255 - alphaIm1) * cSrc[cp] +
+ alphaIm1 * cBlend[cp]) / 255) /
+ alphaI];
+ }
+ break;
+#endif
+ }
+
+ //----- write destination pixel
+
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ if (state->screen->test(pipe->x, pipe->y, cResult0)) {
+ *pipe->destColorPtr |= pipe->destColorMask;
+ } else {
+ *pipe->destColorPtr &= ~pipe->destColorMask;
+ }
+ if (!(pipe->destColorMask >>= 1)) {
+ pipe->destColorMask = 0x80;
+ ++pipe->destColorPtr;
+ }
+ break;
+ case splashModeMono8:
+ *pipe->destColorPtr++ = cResult0;
+ break;
+ case splashModeRGB8:
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult2;
+ break;
+ case splashModeXBGR8:
+ *pipe->destColorPtr++ = cResult2;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destColorPtr++ = 255;
+ break;
+ case splashModeBGR8:
+ *pipe->destColorPtr++ = cResult2;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult0;
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ if (state->overprintMask & 1) {
+ pipe->destColorPtr[0] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[0] + cResult0, 255) :
+ cResult0;
+ }
+ if (state->overprintMask & 2) {
+ pipe->destColorPtr[1] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[1] + cResult1, 255) :
+ cResult1;
+ }
+ if (state->overprintMask & 4) {
+ pipe->destColorPtr[2] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[2] + cResult2, 255) :
+ cResult2;
+ }
+ if (state->overprintMask & 8) {
+ pipe->destColorPtr[3] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[3] + cResult3, 255) :
+ cResult3;
+ }
+ pipe->destColorPtr += 4;
+ break;
+ case splashModeDeviceN8:
+ mask = 1;
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++) {
+ if (state->overprintMask & mask) {
+ pipe->destColorPtr[cp] = cResult[cp];
+ }
+ mask <<=1;
+ }
+ pipe->destColorPtr += (SPOT_NCOMPS+4);
+ break;
+#endif
+ }
+ if (pipe->destAlphaPtr) {
+ *pipe->destAlphaPtr++ = aResult;
+ }
+
+ }
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleMono1(SplashPipe *pipe) {
+ Guchar cResult0;
+
+ //----- write destination pixel
+ cResult0 = state->grayTransfer[pipe->cSrc[0]];
+ if (state->screen->test(pipe->x, pipe->y, cResult0)) {
+ *pipe->destColorPtr |= pipe->destColorMask;
+ } else {
+ *pipe->destColorPtr &= ~pipe->destColorMask;
+ }
+ if (!(pipe->destColorMask >>= 1)) {
+ pipe->destColorMask = 0x80;
+ ++pipe->destColorPtr;
+ }
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeMono8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleMono8(SplashPipe *pipe) {
+ //----- write destination pixel
+ *pipe->destColorPtr++ = state->grayTransfer[pipe->cSrc[0]];
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleRGB8(SplashPipe *pipe) {
+ //----- write destination pixel
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleXBGR8(SplashPipe *pipe) {
+ //----- write destination pixel
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ *pipe->destColorPtr++ = 255;
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleBGR8(SplashPipe *pipe) {
+ //----- write destination pixel
+ *pipe->destColorPtr++ = state->rgbTransferB[pipe->cSrc[2]];
+ *pipe->destColorPtr++ = state->rgbTransferG[pipe->cSrc[1]];
+ *pipe->destColorPtr++ = state->rgbTransferR[pipe->cSrc[0]];
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+
+#if SPLASH_CMYK
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleCMYK8(SplashPipe *pipe) {
+ //----- write destination pixel
+ if (state->overprintMask & 1) {
+ pipe->destColorPtr[0] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[0] + state->cmykTransferC[pipe->cSrc[0]], 255) :
+ state->cmykTransferC[pipe->cSrc[0]];
+ }
+ if (state->overprintMask & 2) {
+ pipe->destColorPtr[1] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[1] + state->cmykTransferM[pipe->cSrc[1]], 255) :
+ state->cmykTransferM[pipe->cSrc[1]];
+ }
+ if (state->overprintMask & 4) {
+ pipe->destColorPtr[2] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[2] + state->cmykTransferY[pipe->cSrc[2]], 255) :
+ state->cmykTransferY[pipe->cSrc[2]];
+ }
+ if (state->overprintMask & 8) {
+ pipe->destColorPtr[3] = (state->overprintAdditive) ?
+ std::min<int>(pipe->destColorPtr[3] + state->cmykTransferK[pipe->cSrc[3]], 255) :
+ state->cmykTransferK[pipe->cSrc[3]];
+ }
+ pipe->destColorPtr += 4;
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && pipe->noTransparency && !state->blendFunc &&
+// bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr) {
+void Splash::pipeRunSimpleDeviceN8(SplashPipe *pipe) {
+ //----- write destination pixel
+ int mask = 1;
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++) {
+ if (state->overprintMask & mask) {
+ pipe->destColorPtr[cp] = state->deviceNTransfer[cp][pipe->cSrc[cp]];
+ }
+ mask <<=1;
+ }
+ pipe->destColorPtr += (SPOT_NCOMPS+4);
+ *pipe->destAlphaPtr++ = 255;
+
+ ++pipe->x;
+}
+#endif
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeMono1 && !pipe->destAlphaPtr
+void Splash::pipeRunAAMono1(SplashPipe *pipe) {
+ Guchar aSrc;
+ SplashColor cDest;
+ Guchar cResult0;
+
+ //----- read destination pixel
+ cDest[0] = (*pipe->destColorPtr & pipe->destColorMask) ? 0xff : 0x00;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result color
+ // note: aDest = alpha2 = aResult = 0xff
+ cResult0 = state->grayTransfer[(Guchar)div255((0xff - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0])];
+
+ //----- write destination pixel
+ if (state->screen->test(pipe->x, pipe->y, cResult0)) {
+ *pipe->destColorPtr |= pipe->destColorMask;
+ } else {
+ *pipe->destColorPtr &= ~pipe->destColorMask;
+ }
+ if (!(pipe->destColorMask >>= 1)) {
+ pipe->destColorMask = 0x80;
+ ++pipe->destColorPtr;
+ }
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeMono8 && pipe->destAlphaPtr
+void Splash::pipeRunAAMono8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult0;
+
+ //----- read destination pixel
+ cDest[0] = *pipe->destColorPtr;
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ cResult0 = 0;
+ } else {
+ cResult0 = state->grayTransfer[(Guchar)(((alpha2 - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeRGB8 && pipe->destAlphaPtr
+void Splash::pipeRunAARGB8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult0, cResult1, cResult2;
+
+ //----- read destination pixel
+ cDest[0] = pipe->destColorPtr[0];
+ cDest[1] = pipe->destColorPtr[1];
+ cDest[2] = pipe->destColorPtr[2];
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ } else {
+ cResult0 = state->rgbTransferR[(Guchar)(((alpha2 - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0]) / alpha2)];
+ cResult1 = state->rgbTransferG[(Guchar)(((alpha2 - aSrc) * cDest[1] +
+ aSrc * pipe->cSrc[1]) / alpha2)];
+ cResult2 = state->rgbTransferB[(Guchar)(((alpha2 - aSrc) * cDest[2] +
+ aSrc * pipe->cSrc[2]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult2;
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeXBGR8 && pipe->destAlphaPtr
+void Splash::pipeRunAAXBGR8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult0, cResult1, cResult2;
+
+ //----- read destination pixel
+ cDest[0] = pipe->destColorPtr[2];
+ cDest[1] = pipe->destColorPtr[1];
+ cDest[2] = pipe->destColorPtr[0];
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ } else {
+ cResult0 = state->rgbTransferR[(Guchar)(((alpha2 - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0]) / alpha2)];
+ cResult1 = state->rgbTransferG[(Guchar)(((alpha2 - aSrc) * cDest[1] +
+ aSrc * pipe->cSrc[1]) / alpha2)];
+ cResult2 = state->rgbTransferB[(Guchar)(((alpha2 - aSrc) * cDest[2] +
+ aSrc * pipe->cSrc[2]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ *pipe->destColorPtr++ = cResult2;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destColorPtr++ = 255;
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeBGR8 && pipe->destAlphaPtr
+void Splash::pipeRunAABGR8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult0, cResult1, cResult2;
+
+ //----- read destination pixel
+ cDest[0] = pipe->destColorPtr[2];
+ cDest[1] = pipe->destColorPtr[1];
+ cDest[2] = pipe->destColorPtr[0];
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ } else {
+ cResult0 = state->rgbTransferR[(Guchar)(((alpha2 - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0]) / alpha2)];
+ cResult1 = state->rgbTransferG[(Guchar)(((alpha2 - aSrc) * cDest[1] +
+ aSrc * pipe->cSrc[1]) / alpha2)];
+ cResult2 = state->rgbTransferB[(Guchar)(((alpha2 - aSrc) * cDest[2] +
+ aSrc * pipe->cSrc[2]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ *pipe->destColorPtr++ = cResult2;
+ *pipe->destColorPtr++ = cResult1;
+ *pipe->destColorPtr++ = cResult0;
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+
+#if SPLASH_CMYK
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeCMYK8 && pipe->destAlphaPtr
+void Splash::pipeRunAACMYK8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult0, cResult1, cResult2, cResult3;
+
+ //----- read destination pixel
+ cDest[0] = pipe->destColorPtr[0];
+ cDest[1] = pipe->destColorPtr[1];
+ cDest[2] = pipe->destColorPtr[2];
+ cDest[3] = pipe->destColorPtr[3];
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ cResult0 = 0;
+ cResult1 = 0;
+ cResult2 = 0;
+ cResult3 = 0;
+ } else {
+ cResult0 = state->cmykTransferC[(Guchar)(((alpha2 - aSrc) * cDest[0] +
+ aSrc * pipe->cSrc[0]) / alpha2)];
+ cResult1 = state->cmykTransferM[(Guchar)(((alpha2 - aSrc) * cDest[1] +
+ aSrc * pipe->cSrc[1]) / alpha2)];
+ cResult2 = state->cmykTransferY[(Guchar)(((alpha2 - aSrc) * cDest[2] +
+ aSrc * pipe->cSrc[2]) / alpha2)];
+ cResult3 = state->cmykTransferK[(Guchar)(((alpha2 - aSrc) * cDest[3] +
+ aSrc * pipe->cSrc[3]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ if (state->overprintMask & 1) {
+ pipe->destColorPtr[0] = (state->overprintAdditive && pipe->shape != 0) ?
+ std::min<int>(pipe->destColorPtr[0] + cResult0, 255) :
+ cResult0;
+ }
+ if (state->overprintMask & 2) {
+ pipe->destColorPtr[1] = (state->overprintAdditive && pipe->shape != 0) ?
+ std::min<int>(pipe->destColorPtr[1] + cResult1, 255) :
+ cResult1;
+ }
+ if (state->overprintMask & 4) {
+ pipe->destColorPtr[2] = (state->overprintAdditive && pipe->shape != 0) ?
+ std::min<int>(pipe->destColorPtr[2] + cResult2, 255) :
+ cResult2;
+ }
+ if (state->overprintMask & 8) {
+ pipe->destColorPtr[3] = (state->overprintAdditive && pipe->shape != 0) ?
+ std::min<int>(pipe->destColorPtr[3] + cResult3, 255) :
+ cResult3;
+ }
+ pipe->destColorPtr += 4;
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+
+// special case:
+// !pipe->pattern && !pipe->noTransparency && !state->softMask &&
+// pipe->usesShape && !pipe->alpha0Ptr && !state->blendFunc &&
+// !pipe->nonIsolatedGroup &&
+// bitmap->mode == splashModeDeviceN8 && pipe->destAlphaPtr
+void Splash::pipeRunAADeviceN8(SplashPipe *pipe) {
+ Guchar aSrc, aDest, alpha2, aResult;
+ SplashColor cDest;
+ Guchar cResult[SPOT_NCOMPS+4];
+ int cp, mask;
+
+ //----- read destination pixel
+ for (cp=0; cp < SPOT_NCOMPS+4; cp++)
+ cDest[cp] = pipe->destColorPtr[cp];
+ aDest = *pipe->destAlphaPtr;
+
+ //----- source alpha
+ aSrc = div255(pipe->aInput * pipe->shape);
+
+ //----- result alpha and non-isolated group element correction
+ aResult = aSrc + aDest - div255(aSrc * aDest);
+ alpha2 = aResult;
+
+ //----- result color
+ if (alpha2 == 0) {
+ for (cp=0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = 0;
+ } else {
+ for (cp=0; cp < SPOT_NCOMPS+4; cp++)
+ cResult[cp] = state->deviceNTransfer[cp][(Guchar)(((alpha2 - aSrc) * cDest[cp] +
+ aSrc * pipe->cSrc[cp]) / alpha2)];
+ }
+
+ //----- write destination pixel
+ mask = 1;
+ for (cp=0; cp < SPOT_NCOMPS+4; cp++) {
+ if (state->overprintMask & mask) {
+ pipe->destColorPtr[cp] = cResult[cp];
+ }
+ mask <<= 1;
+ }
+ pipe->destColorPtr += (SPOT_NCOMPS+4);
+ *pipe->destAlphaPtr++ = aResult;
+
+ ++pipe->x;
+}
+#endif
+
+inline void Splash::pipeSetXY(SplashPipe *pipe, int x, int y) {
+ pipe->x = x;
+ pipe->y = y;
+ if (state->softMask) {
+ pipe->softMaskPtr =
+ &state->softMask->data[y * state->softMask->rowSize + x];
+ }
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + (x >> 3)];
+ pipe->destColorMask = 0x80 >> (x & 7);
+ break;
+ case splashModeMono8:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + x];
+ break;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 3 * x];
+ break;
+ case splashModeXBGR8:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 4 * x];
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 4 * x];
+ break;
+ case splashModeDeviceN8:
+ pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + (SPOT_NCOMPS + 4) * x];
+ break;
+#endif
+ }
+ if (bitmap->alpha) {
+ pipe->destAlphaPtr = &bitmap->alpha[y * bitmap->width + x];
+ } else {
+ pipe->destAlphaPtr = NULL;
+ }
+ if (state->inNonIsolatedGroup && alpha0Bitmap->alpha) {
+ pipe->alpha0Ptr =
+ &alpha0Bitmap->alpha[(alpha0Y + y) * alpha0Bitmap->width +
+ (alpha0X + x)];
+ } else {
+ pipe->alpha0Ptr = NULL;
+ }
+}
+
+inline void Splash::pipeIncX(SplashPipe *pipe) {
+ ++pipe->x;
+ if (state->softMask) {
+ ++pipe->softMaskPtr;
+ }
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ if (!(pipe->destColorMask >>= 1)) {
+ pipe->destColorMask = 0x80;
+ ++pipe->destColorPtr;
+ }
+ break;
+ case splashModeMono8:
+ ++pipe->destColorPtr;
+ break;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ pipe->destColorPtr += 3;
+ break;
+ case splashModeXBGR8:
+ pipe->destColorPtr += 4;
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ pipe->destColorPtr += 4;
+ break;
+ case splashModeDeviceN8:
+ pipe->destColorPtr += (SPOT_NCOMPS+4);
+ break;
+#endif
+ }
+ if (pipe->destAlphaPtr) {
+ ++pipe->destAlphaPtr;
+ }
+ if (pipe->alpha0Ptr) {
+ ++pipe->alpha0Ptr;
+ }
+}
+
+inline void Splash::drawPixel(SplashPipe *pipe, int x, int y, GBool noClip) {
+ if (unlikely(y < 0))
+ return;
+
+ if (noClip || state->clip->test(x, y)) {
+ pipeSetXY(pipe, x, y);
+ (this->*pipe->run)(pipe);
+ updateModX(x);
+ updateModY(y);
+ }
+}
+
+inline void Splash::drawAAPixelInit() {
+ aaBufY = -1;
+}
+
+inline void Splash::drawAAPixel(SplashPipe *pipe, int x, int y) {
+#if splashAASize == 4
+ static int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3,
+ 1, 2, 2, 3, 2, 3, 3, 4 };
+ int w;
+#else
+ int xx, yy;
+#endif
+ SplashColorPtr p;
+ int x0, x1, t;
+
+ if (x < 0 || x >= bitmap->width ||
+ y < state->clip->getYMinI() || y > state->clip->getYMaxI()) {
+ return;
+ }
+
+ // update aaBuf
+ if (y != aaBufY) {
+ memset(aaBuf->getDataPtr(), 0xff,
+ aaBuf->getRowSize() * aaBuf->getHeight());
+ x0 = 0;
+ x1 = bitmap->width - 1;
+ state->clip->clipAALine(aaBuf, &x0, &x1, y);
+ aaBufY = y;
+ }
+
+ // compute the shape value
+#if splashAASize == 4
+ p = aaBuf->getDataPtr() + (x >> 1);
+ w = aaBuf->getRowSize();
+ if (x & 1) {
+ t = bitCount4[*p & 0x0f] + bitCount4[p[w] & 0x0f] +
+ bitCount4[p[2*w] & 0x0f] + bitCount4[p[3*w] & 0x0f];
+ } else {
+ t = bitCount4[*p >> 4] + bitCount4[p[w] >> 4] +
+ bitCount4[p[2*w] >> 4] + bitCount4[p[3*w] >> 4];
+ }
+#else
+ t = 0;
+ for (yy = 0; yy < splashAASize; ++yy) {
+ for (xx = 0; xx < splashAASize; ++xx) {
+ p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() +
+ ((x * splashAASize + xx) >> 3);
+ t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1;
+ }
+ }
+#endif
+
+ // draw the pixel
+ if (t != 0) {
+ pipeSetXY(pipe, x, y);
+ pipe->shape = div255(aaGamma[t] * pipe->shape);
+ (this->*pipe->run)(pipe);
+ updateModX(x);
+ updateModY(y);
+ }
+}
+
+inline void Splash::drawSpan(SplashPipe *pipe, int x0, int x1, int y,
+ GBool noClip) {
+ int x;
+
+ if (noClip) {
+ pipeSetXY(pipe, x0, y);
+ for (x = x0; x <= x1; ++x) {
+ (this->*pipe->run)(pipe);
+ }
+ updateModX(x0);
+ updateModX(x1);
+ updateModY(y);
+ } else {
+ if (x0 < state->clip->getXMinI()) {
+ x0 = state->clip->getXMinI();
+ }
+ if (x1 > state->clip->getXMaxI()) {
+ x1 = state->clip->getXMaxI();
+ }
+ pipeSetXY(pipe, x0, y);
+ for (x = x0; x <= x1; ++x) {
+ if (state->clip->test(x, y)) {
+ (this->*pipe->run)(pipe);
+ updateModX(x);
+ updateModY(y);
+ } else {
+ pipeIncX(pipe);
+ }
+ }
+ }
+}
+
+inline void Splash::drawAALine(SplashPipe *pipe, int x0, int x1, int y, GBool adjustLine, Guchar lineOpacity) {
+#if splashAASize == 4
+ static int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3,
+ 1, 2, 2, 3, 2, 3, 3, 4 };
+ SplashColorPtr p0, p1, p2, p3;
+ int t;
+#else
+ SplashColorPtr p;
+ int xx, yy, t;
+#endif
+ int x;
+
+#if splashAASize == 4
+ p0 = aaBuf->getDataPtr() + (x0 >> 1);
+ p1 = p0 + aaBuf->getRowSize();
+ p2 = p1 + aaBuf->getRowSize();
+ p3 = p2 + aaBuf->getRowSize();
+#endif
+ pipeSetXY(pipe, x0, y);
+ for (x = x0; x <= x1; ++x) {
+
+ // compute the shape value
+#if splashAASize == 4
+ if (x & 1) {
+ t = bitCount4[*p0 & 0x0f] + bitCount4[*p1 & 0x0f] +
+ bitCount4[*p2 & 0x0f] + bitCount4[*p3 & 0x0f];
+ ++p0; ++p1; ++p2; ++p3;
+ } else {
+ t = bitCount4[*p0 >> 4] + bitCount4[*p1 >> 4] +
+ bitCount4[*p2 >> 4] + bitCount4[*p3 >> 4];
+ }
+#else
+ t = 0;
+ for (yy = 0; yy < splashAASize; ++yy) {
+ for (xx = 0; xx < splashAASize; ++xx) {
+ p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() +
+ ((x * splashAASize + xx) >> 3);
+ t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1;
+ }
+ }
+#endif
+
+ if (t != 0) {
+ pipe->shape = (adjustLine) ? div255((int) lineOpacity * (double)aaGamma[t]) : (double)aaGamma[t];
+ (this->*pipe->run)(pipe);
+ updateModX(x);
+ updateModY(y);
+ } else {
+ pipeIncX(pipe);
+ }
+ }
+}
+
+//------------------------------------------------------------------------
+
+// Transform a point from user space to device space.
+inline void Splash::transform(SplashCoord *matrix,
+ SplashCoord xi, SplashCoord yi,
+ SplashCoord *xo, SplashCoord *yo) {
+ // [ m[0] m[1] 0 ]
+ // [xo yo 1] = [xi yi 1] * [ m[2] m[3] 0 ]
+ // [ m[4] m[5] 1 ]
+ *xo = xi * matrix[0] + yi * matrix[2] + matrix[4];
+ *yo = xi * matrix[1] + yi * matrix[3] + matrix[5];
+}
+
+//------------------------------------------------------------------------
+// Splash
+//------------------------------------------------------------------------
+
+Splash::Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
+ SplashScreenParams *screenParams) {
+ int i;
+
+ bitmap = bitmapA;
+ vectorAntialias = vectorAntialiasA;
+ inShading = gFalse;
+ state = new SplashState(bitmap->width, bitmap->height, vectorAntialias,
+ screenParams);
+ if (vectorAntialias) {
+ aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize,
+ 1, splashModeMono1, gFalse);
+ for (i = 0; i <= splashAASize * splashAASize; ++i) {
+ aaGamma[i] = (Guchar)splashRound(
+ splashPow((SplashCoord)i /
+ (SplashCoord)(splashAASize * splashAASize),
+ splashAAGamma) * 255);
+ }
+ } else {
+ aaBuf = NULL;
+ }
+ minLineWidth = 0;
+ thinLineMode = splashThinLineDefault;
+ clearModRegion();
+ debugMode = gFalse;
+ alpha0Bitmap = NULL;
+}
+
+Splash::Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
+ SplashScreen *screenA) {
+ int i;
+
+ bitmap = bitmapA;
+ inShading = gFalse;
+ vectorAntialias = vectorAntialiasA;
+ state = new SplashState(bitmap->width, bitmap->height, vectorAntialias,
+ screenA);
+ if (vectorAntialias) {
+ aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize,
+ 1, splashModeMono1, gFalse);
+ for (i = 0; i <= splashAASize * splashAASize; ++i) {
+ aaGamma[i] = (Guchar)splashRound(
+ splashPow((SplashCoord)i /
+ (SplashCoord)(splashAASize * splashAASize),
+ splashAAGamma) * 255);
+ }
+ } else {
+ aaBuf = NULL;
+ }
+ minLineWidth = 0;
+ thinLineMode = splashThinLineDefault;
+ clearModRegion();
+ debugMode = gFalse;
+ alpha0Bitmap = NULL;
+}
+
+Splash::~Splash() {
+ while (state->next) {
+ restoreState();
+ }
+ delete state;
+ if (vectorAntialias) {
+ delete aaBuf;
+ }
+}
+
+//------------------------------------------------------------------------
+// state read
+//------------------------------------------------------------------------
+
+SplashCoord *Splash::getMatrix() {
+ return state->matrix;
+}
+
+SplashPattern *Splash::getStrokePattern() {
+ return state->strokePattern;
+}
+
+SplashPattern *Splash::getFillPattern() {
+ return state->fillPattern;
+}
+
+SplashScreen *Splash::getScreen() {
+ return state->screen;
+}
+
+SplashBlendFunc Splash::getBlendFunc() {
+ return state->blendFunc;
+}
+
+SplashCoord Splash::getStrokeAlpha() {
+ return state->strokeAlpha;
+}
+
+SplashCoord Splash::getFillAlpha() {
+ return state->fillAlpha;
+}
+
+SplashCoord Splash::getLineWidth() {
+ return state->lineWidth;
+}
+
+int Splash::getLineCap() {
+ return state->lineCap;
+}
+
+int Splash::getLineJoin() {
+ return state->lineJoin;
+}
+
+SplashCoord Splash::getMiterLimit() {
+ return state->miterLimit;
+}
+
+SplashCoord Splash::getFlatness() {
+ return state->flatness;
+}
+
+SplashCoord *Splash::getLineDash() {
+ return state->lineDash;
+}
+
+int Splash::getLineDashLength() {
+ return state->lineDashLength;
+}
+
+SplashCoord Splash::getLineDashPhase() {
+ return state->lineDashPhase;
+}
+
+GBool Splash::getStrokeAdjust() {
+ return state->strokeAdjust;
+}
+
+SplashClip *Splash::getClip() {
+ return state->clip;
+}
+
+SplashBitmap *Splash::getSoftMask() {
+ return state->softMask;
+}
+
+GBool Splash::getInNonIsolatedGroup() {
+ return state->inNonIsolatedGroup;
+}
+
+//------------------------------------------------------------------------
+// state write
+//------------------------------------------------------------------------
+
+void Splash::setMatrix(SplashCoord *matrix) {
+ memcpy(state->matrix, matrix, 6 * sizeof(SplashCoord));
+}
+
+void Splash::setStrokePattern(SplashPattern *strokePattern) {
+ state->setStrokePattern(strokePattern);
+}
+
+void Splash::setFillPattern(SplashPattern *fillPattern) {
+ state->setFillPattern(fillPattern);
+}
+
+void Splash::setScreen(SplashScreen *screen) {
+ state->setScreen(screen);
+}
+
+void Splash::setBlendFunc(SplashBlendFunc func) {
+ state->blendFunc = func;
+}
+
+void Splash::setStrokeAlpha(SplashCoord alpha) {
+ state->strokeAlpha = alpha;
+}
+
+void Splash::setFillAlpha(SplashCoord alpha) {
+ state->fillAlpha = alpha;
+}
+
+void Splash::setFillOverprint(GBool fop) {
+ state->fillOverprint = fop;
+}
+
+void Splash::setStrokeOverprint(GBool gop) {
+ state->strokeOverprint = gop;
+}
+
+void Splash::setOverprintMode(int opm) {
+ state->overprintMode = opm;
+}
+
+void Splash::setLineWidth(SplashCoord lineWidth) {
+ state->lineWidth = lineWidth;
+}
+
+void Splash::setLineCap(int lineCap) {
+ state->lineCap = lineCap;
+}
+
+void Splash::setLineJoin(int lineJoin) {
+ state->lineJoin = lineJoin;
+}
+
+void Splash::setMiterLimit(SplashCoord miterLimit) {
+ state->miterLimit = miterLimit;
+}
+
+void Splash::setFlatness(SplashCoord flatness) {
+ if (flatness < 1) {
+ state->flatness = 1;
+ } else {
+ state->flatness = flatness;
+ }
+}
+
+void Splash::setLineDash(SplashCoord *lineDash, int lineDashLength,
+ SplashCoord lineDashPhase) {
+ state->setLineDash(lineDash, lineDashLength, lineDashPhase);
+}
+
+void Splash::setStrokeAdjust(GBool strokeAdjust) {
+ state->strokeAdjust = strokeAdjust;
+}
+
+void Splash::clipResetToRect(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1) {
+ state->clip->resetToRect(x0, y0, x1, y1);
+}
+
+SplashError Splash::clipToRect(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1) {
+ return state->clip->clipToRect(x0, y0, x1, y1);
+}
+
+SplashError Splash::clipToPath(SplashPath *path, GBool eo) {
+ return state->clip->clipToPath(path, state->matrix, state->flatness, eo);
+}
+
+void Splash::setSoftMask(SplashBitmap *softMask) {
+ state->setSoftMask(softMask);
+}
+
+void Splash::setInNonIsolatedGroup(SplashBitmap *alpha0BitmapA,
+ int alpha0XA, int alpha0YA) {
+ alpha0Bitmap = alpha0BitmapA;
+ alpha0X = alpha0XA;
+ alpha0Y = alpha0YA;
+ state->inNonIsolatedGroup = gTrue;
+}
+
+void Splash::setTransfer(Guchar *red, Guchar *green, Guchar *blue,
+ Guchar *gray) {
+ state->setTransfer(red, green, blue, gray);
+}
+
+void Splash::setOverprintMask(Guint overprintMask, GBool additive) {
+ state->overprintMask = overprintMask;
+ state->overprintAdditive = additive;
+}
+
+//------------------------------------------------------------------------
+// state save/restore
+//------------------------------------------------------------------------
+
+void Splash::saveState() {
+ SplashState *newState;
+
+ newState = state->copy();
+ newState->next = state;
+ state = newState;
+}
+
+SplashError Splash::restoreState() {
+ SplashState *oldState;
+
+ if (!state->next) {
+ return splashErrNoSave;
+ }
+ oldState = state;
+ state = state->next;
+ delete oldState;
+ return splashOk;
+}
+
+//------------------------------------------------------------------------
+// drawing operations
+//------------------------------------------------------------------------
+
+void Splash::clear(SplashColorPtr color, Guchar alpha) {
+ SplashColorPtr row, p;
+ Guchar mono;
+ int x, y;
+
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ mono = (color[0] & 0x80) ? 0xff : 0x00;
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ mono, -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, mono, bitmap->rowSize * bitmap->height);
+ }
+ break;
+ case splashModeMono8:
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ color[0], -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, color[0], bitmap->rowSize * bitmap->height);
+ }
+ break;
+ case splashModeRGB8:
+ if (color[0] == color[1] && color[1] == color[2]) {
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ color[0], -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, color[0], bitmap->rowSize * bitmap->height);
+ }
+ } else {
+ row = bitmap->data;
+ for (y = 0; y < bitmap->height; ++y) {
+ p = row;
+ for (x = 0; x < bitmap->width; ++x) {
+ *p++ = color[2];
+ *p++ = color[1];
+ *p++ = color[0];
+ }
+ row += bitmap->rowSize;
+ }
+ }
+ break;
+ case splashModeXBGR8:
+ if (color[0] == color[1] && color[1] == color[2]) {
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ color[0], -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, color[0], bitmap->rowSize * bitmap->height);
+ }
+ } else {
+ row = bitmap->data;
+ for (y = 0; y < bitmap->height; ++y) {
+ p = row;
+ for (x = 0; x < bitmap->width; ++x) {
+ *p++ = color[0];
+ *p++ = color[1];
+ *p++ = color[2];
+ *p++ = 255;
+ }
+ row += bitmap->rowSize;
+ }
+ }
+ break;
+ case splashModeBGR8:
+ if (color[0] == color[1] && color[1] == color[2]) {
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ color[0], -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, color[0], bitmap->rowSize * bitmap->height);
+ }
+ } else {
+ row = bitmap->data;
+ for (y = 0; y < bitmap->height; ++y) {
+ p = row;
+ for (x = 0; x < bitmap->width; ++x) {
+ *p++ = color[0];
+ *p++ = color[1];
+ *p++ = color[2];
+ }
+ row += bitmap->rowSize;
+ }
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ if (color[0] == color[1] && color[1] == color[2] && color[2] == color[3]) {
+ if (bitmap->rowSize < 0) {
+ memset(bitmap->data + bitmap->rowSize * (bitmap->height - 1),
+ color[0], -bitmap->rowSize * bitmap->height);
+ } else {
+ memset(bitmap->data, color[0], bitmap->rowSize * bitmap->height);
+ }
+ } else {
+ row = bitmap->data;
+ for (y = 0; y < bitmap->height; ++y) {
+ p = row;
+ for (x = 0; x < bitmap->width; ++x) {
+ *p++ = color[0];
+ *p++ = color[1];
+ *p++ = color[2];
+ *p++ = color[3];
+ }
+ row += bitmap->rowSize;
+ }
+ }
+ break;
+ case splashModeDeviceN8:
+ row = bitmap->data;
+ for (y = 0; y < bitmap->height; ++y) {
+ p = row;
+ for (x = 0; x < bitmap->width; ++x) {
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *p++ = color[cp];
+ }
+ row += bitmap->rowSize;
+ }
+ break;
+#endif
+ }
+
+ if (bitmap->alpha) {
+ memset(bitmap->alpha, alpha, bitmap->width * bitmap->height);
+ }
+
+ updateModX(0);
+ updateModY(0);
+ updateModX(bitmap->width - 1);
+ updateModY(bitmap->height - 1);
+}
+
+SplashError Splash::stroke(SplashPath *path) {
+ SplashPath *path2, *dPath;
+ SplashCoord d1, d2, t1, t2, w;
+
+ if (debugMode) {
+ printf("stroke [dash:%d] [width:%.2f]:\n",
+ state->lineDashLength, (double)state->lineWidth);
+ dumpPath(path);
+ }
+ opClipRes = splashClipAllOutside;
+ if (path->length == 0) {
+ return splashErrEmptyPath;
+ }
+ path2 = flattenPath(path, state->matrix, state->flatness);
+ if (state->lineDashLength > 0) {
+ dPath = makeDashedPath(path2);
+ delete path2;
+ path2 = dPath;
+ if (path2->length == 0) {
+ delete path2;
+ return splashErrEmptyPath;
+ }
+ }
+
+ // transform a unit square, and take the half the max of the two
+ // diagonals; the product of this number and the line width is the
+ // (approximate) transformed line width
+ t1 = state->matrix[0] + state->matrix[2];
+ t2 = state->matrix[1] + state->matrix[3];
+ d1 = t1 * t1 + t2 * t2;
+ t1 = state->matrix[0] - state->matrix[2];
+ t2 = state->matrix[1] - state->matrix[3];
+ d2 = t1 * t1 + t2 * t2;
+ if (d2 > d1) {
+ d1 = d2;
+ }
+ d1 *= 0.5;
+ if (d1 > 0 &&
+ d1 * state->lineWidth * state->lineWidth < minLineWidth * minLineWidth) {
+ w = minLineWidth / splashSqrt(d1);
+ strokeWide(path2, w);
+ } else if (bitmap->mode == splashModeMono1) {
+ // this gets close to Adobe's behavior in mono mode
+ if (d1 * state->lineWidth <= 2) {
+ strokeNarrow(path2);
+ } else {
+ strokeWide(path2, state->lineWidth);
+ }
+ } else {
+ if (state->lineWidth == 0) {
+ strokeNarrow(path2);
+ } else {
+ strokeWide(path2, state->lineWidth);
+ }
+ }
+
+ delete path2;
+ return splashOk;
+}
+
+void Splash::strokeNarrow(SplashPath *path) {
+ SplashPipe pipe;
+ SplashXPath *xPath;
+ SplashXPathSeg *seg;
+ int x0, x1, y0, y1, xa, xb, y;
+ SplashCoord dxdy;
+ SplashClipResult clipRes;
+ int nClipRes[3];
+ int i;
+
+ nClipRes[0] = nClipRes[1] = nClipRes[2] = 0;
+
+ xPath = new SplashXPath(path, state->matrix, state->flatness, gFalse);
+
+ pipeInit(&pipe, 0, 0, state->strokePattern, NULL,
+ (Guchar)splashRound(state->strokeAlpha * 255),
+ gFalse, gFalse);
+
+ for (i = 0, seg = xPath->segs; i < xPath->length; ++i, ++seg) {
+ if (seg->y0 <= seg->y1) {
+ y0 = splashFloor(seg->y0);
+ y1 = splashFloor(seg->y1);
+ x0 = splashFloor(seg->x0);
+ x1 = splashFloor(seg->x1);
+ } else {
+ y0 = splashFloor(seg->y1);
+ y1 = splashFloor(seg->y0);
+ x0 = splashFloor(seg->x1);
+ x1 = splashFloor(seg->x0);
+ }
+ if ((clipRes = state->clip->testRect(x0 <= x1 ? x0 : x1, y0,
+ x0 <= x1 ? x1 : x0, y1))
+ != splashClipAllOutside) {
+ if (y0 == y1) {
+ if (x0 <= x1) {
+ drawSpan(&pipe, x0, x1, y0, clipRes == splashClipAllInside);
+ } else {
+ drawSpan(&pipe, x1, x0, y0, clipRes == splashClipAllInside);
+ }
+ } else {
+ dxdy = seg->dxdy;
+ if (y0 < state->clip->getYMinI()) {
+ y0 = state->clip->getYMinI();
+ x0 = splashFloor(seg->x0 + ((SplashCoord)y0 - seg->y0) * dxdy);
+ }
+ if (y1 > state->clip->getYMaxI()) {
+ y1 = state->clip->getYMaxI();
+ x1 = splashFloor(seg->x0 + ((SplashCoord)y1 - seg->y0) * dxdy);
+ }
+ if (x0 <= x1) {
+ xa = x0;
+ for (y = y0; y <= y1; ++y) {
+ if (y < y1) {
+ xb = splashFloor(seg->x0 +
+ ((SplashCoord)y + 1 - seg->y0) * dxdy);
+ } else {
+ xb = x1 + 1;
+ }
+ if (xa == xb) {
+ drawPixel(&pipe, xa, y, clipRes == splashClipAllInside);
+ } else {
+ drawSpan(&pipe, xa, xb - 1, y, clipRes == splashClipAllInside);
+ }
+ xa = xb;
+ }
+ } else {
+ xa = x0;
+ for (y = y0; y <= y1; ++y) {
+ if (y < y1) {
+ xb = splashFloor(seg->x0 +
+ ((SplashCoord)y + 1 - seg->y0) * dxdy);
+ } else {
+ xb = x1 - 1;
+ }
+ if (xa == xb) {
+ drawPixel(&pipe, xa, y, clipRes == splashClipAllInside);
+ } else {
+ drawSpan(&pipe, xb + 1, xa, y, clipRes == splashClipAllInside);
+ }
+ xa = xb;
+ }
+ }
+ }
+ }
+ ++nClipRes[clipRes];
+ }
+ if (nClipRes[splashClipPartial] ||
+ (nClipRes[splashClipAllInside] && nClipRes[splashClipAllOutside])) {
+ opClipRes = splashClipPartial;
+ } else if (nClipRes[splashClipAllInside]) {
+ opClipRes = splashClipAllInside;
+ } else {
+ opClipRes = splashClipAllOutside;
+ }
+
+ delete xPath;
+}
+
+void Splash::strokeWide(SplashPath *path, SplashCoord w) {
+ SplashPath *path2;
+
+ path2 = makeStrokePath(path, w, gFalse);
+ fillWithPattern(path2, gFalse, state->strokePattern, state->strokeAlpha);
+ delete path2;
+}
+
+SplashPath *Splash::flattenPath(SplashPath *path, SplashCoord *matrix,
+ SplashCoord flatness) {
+ SplashPath *fPath;
+ SplashCoord flatness2;
+ Guchar flag;
+ int i;
+
+ fPath = new SplashPath();
+#if USE_FIXEDPOINT
+ flatness2 = flatness;
+#else
+ flatness2 = flatness * flatness;
+#endif
+ i = 0;
+ while (i < path->length) {
+ flag = path->flags[i];
+ if (flag & splashPathFirst) {
+ fPath->moveTo(path->pts[i].x, path->pts[i].y);
+ ++i;
+ } else {
+ if (flag & splashPathCurve) {
+ flattenCurve(path->pts[i-1].x, path->pts[i-1].y,
+ path->pts[i ].x, path->pts[i ].y,
+ path->pts[i+1].x, path->pts[i+1].y,
+ path->pts[i+2].x, path->pts[i+2].y,
+ matrix, flatness2, fPath);
+ i += 3;
+ } else {
+ fPath->lineTo(path->pts[i].x, path->pts[i].y);
+ ++i;
+ }
+ if (path->flags[i-1] & splashPathClosed) {
+ fPath->close();
+ }
+ }
+ }
+ return fPath;
+}
+
+void Splash::flattenCurve(SplashCoord x0, SplashCoord y0,
+ SplashCoord x1, SplashCoord y1,
+ SplashCoord x2, SplashCoord y2,
+ SplashCoord x3, SplashCoord y3,
+ SplashCoord *matrix, SplashCoord flatness2,
+ SplashPath *fPath) {
+ SplashCoord cx[splashMaxCurveSplits + 1][3];
+ SplashCoord cy[splashMaxCurveSplits + 1][3];
+ int cNext[splashMaxCurveSplits + 1];
+ SplashCoord xl0, xl1, xl2, xr0, xr1, xr2, xr3, xx1, xx2, xh;
+ SplashCoord yl0, yl1, yl2, yr0, yr1, yr2, yr3, yy1, yy2, yh;
+ SplashCoord dx, dy, mx, my, tx, ty, d1, d2;
+ int p1, p2, p3;
+
+ // initial segment
+ p1 = 0;
+ p2 = splashMaxCurveSplits;
+ cx[p1][0] = x0; cy[p1][0] = y0;
+ cx[p1][1] = x1; cy[p1][1] = y1;
+ cx[p1][2] = x2; cy[p1][2] = y2;
+ cx[p2][0] = x3; cy[p2][0] = y3;
+ cNext[p1] = p2;
+
+ while (p1 < splashMaxCurveSplits) {
+
+ // get the next segment
+ xl0 = cx[p1][0]; yl0 = cy[p1][0];
+ xx1 = cx[p1][1]; yy1 = cy[p1][1];
+ xx2 = cx[p1][2]; yy2 = cy[p1][2];
+ p2 = cNext[p1];
+ xr3 = cx[p2][0]; yr3 = cy[p2][0];
+
+ // compute the distances (in device space) from the control points
+ // to the midpoint of the straight line (this is a bit of a hack,
+ // but it's much faster than computing the actual distances to the
+ // line)
+ transform(matrix, (xl0 + xr3) * 0.5, (yl0 + yr3) * 0.5, &mx, &my);
+ transform(matrix, xx1, yy1, &tx, &ty);
+#if USE_FIXEDPOINT
+ d1 = splashDist(tx, ty, mx, my);
+#else
+ dx = tx - mx;
+ dy = ty - my;
+ d1 = dx*dx + dy*dy;
+#endif
+ transform(matrix, xx2, yy2, &tx, &ty);
+#if USE_FIXEDPOINT
+ d2 = splashDist(tx, ty, mx, my);
+#else
+ dx = tx - mx;
+ dy = ty - my;
+ d2 = dx*dx + dy*dy;
+#endif
+
+ // if the curve is flat enough, or no more subdivisions are
+ // allowed, add the straight line segment
+ if (p2 - p1 == 1 || (d1 <= flatness2 && d2 <= flatness2)) {
+ fPath->lineTo(xr3, yr3);
+ p1 = p2;
+
+ // otherwise, subdivide the curve
+ } else {
+ xl1 = splashAvg(xl0, xx1);
+ yl1 = splashAvg(yl0, yy1);
+ xh = splashAvg(xx1, xx2);
+ yh = splashAvg(yy1, yy2);
+ xl2 = splashAvg(xl1, xh);
+ yl2 = splashAvg(yl1, yh);
+ xr2 = splashAvg(xx2, xr3);
+ yr2 = splashAvg(yy2, yr3);
+ xr1 = splashAvg(xh, xr2);
+ yr1 = splashAvg(yh, yr2);
+ xr0 = splashAvg(xl2, xr1);
+ yr0 = splashAvg(yl2, yr1);
+ // add the new subdivision points
+ p3 = (p1 + p2) / 2;
+ cx[p1][1] = xl1; cy[p1][1] = yl1;
+ cx[p1][2] = xl2; cy[p1][2] = yl2;
+ cNext[p1] = p3;
+ cx[p3][0] = xr0; cy[p3][0] = yr0;
+ cx[p3][1] = xr1; cy[p3][1] = yr1;
+ cx[p3][2] = xr2; cy[p3][2] = yr2;
+ cNext[p3] = p2;
+ }
+ }
+}
+
+SplashPath *Splash::makeDashedPath(SplashPath *path) {
+ SplashPath *dPath;
+ SplashCoord lineDashTotal;
+ SplashCoord lineDashStartPhase, lineDashDist, segLen;
+ SplashCoord x0, y0, x1, y1, xa, ya;
+ GBool lineDashStartOn, lineDashOn, newPath;
+ int lineDashStartIdx, lineDashIdx;
+ int i, j, k;
+
+ lineDashTotal = 0;
+ for (i = 0; i < state->lineDashLength; ++i) {
+ lineDashTotal += state->lineDash[i];
+ }
+ // Acrobat simply draws nothing if the dash array is [0]
+ if (lineDashTotal == 0) {
+ return new SplashPath();
+ }
+ lineDashStartPhase = state->lineDashPhase;
+ i = splashFloor(lineDashStartPhase / lineDashTotal);
+ lineDashStartPhase -= (SplashCoord)i * lineDashTotal;
+ lineDashStartOn = gTrue;
+ lineDashStartIdx = 0;
+ if (lineDashStartPhase > 0) {
+ while (lineDashStartIdx < state->lineDashLength && lineDashStartPhase >= state->lineDash[lineDashStartIdx]) {
+ lineDashStartOn = !lineDashStartOn;
+ lineDashStartPhase -= state->lineDash[lineDashStartIdx];
+ ++lineDashStartIdx;
+ }
+ if (unlikely(lineDashStartIdx == state->lineDashLength)) {
+ return new SplashPath();
+ }
+ }
+
+ dPath = new SplashPath();
+
+ // process each subpath
+ i = 0;
+ while (i < path->length) {
+
+ // find the end of the subpath
+ for (j = i;
+ j < path->length - 1 && !(path->flags[j] & splashPathLast);
+ ++j) ;
+
+ // initialize the dash parameters
+ lineDashOn = lineDashStartOn;
+ lineDashIdx = lineDashStartIdx;
+ lineDashDist = state->lineDash[lineDashIdx] - lineDashStartPhase;
+
+ // process each segment of the subpath
+ newPath = gTrue;
+ for (k = i; k < j; ++k) {
+
+ // grab the segment
+ x0 = path->pts[k].x;
+ y0 = path->pts[k].y;
+ x1 = path->pts[k+1].x;
+ y1 = path->pts[k+1].y;
+ segLen = splashDist(x0, y0, x1, y1);
+
+ // process the segment
+ while (segLen > 0) {
+
+ if (lineDashDist >= segLen) {
+ if (lineDashOn) {
+ if (newPath) {
+ dPath->moveTo(x0, y0);
+ newPath = gFalse;
+ }
+ dPath->lineTo(x1, y1);
+ }
+ lineDashDist -= segLen;
+ segLen = 0;
+
+ } else {
+ xa = x0 + (lineDashDist / segLen) * (x1 - x0);
+ ya = y0 + (lineDashDist / segLen) * (y1 - y0);
+ if (lineDashOn) {
+ if (newPath) {
+ dPath->moveTo(x0, y0);
+ newPath = gFalse;
+ }
+ dPath->lineTo(xa, ya);
+ }
+ x0 = xa;
+ y0 = ya;
+ segLen -= lineDashDist;
+ lineDashDist = 0;
+ }
+
+ // get the next entry in the dash array
+ if (lineDashDist <= 0) {
+ lineDashOn = !lineDashOn;
+ if (++lineDashIdx == state->lineDashLength) {
+ lineDashIdx = 0;
+ }
+ lineDashDist = state->lineDash[lineDashIdx];
+ newPath = gTrue;
+ }
+ }
+ }
+ i = j + 1;
+ }
+
+ if (dPath->length == 0) {
+ GBool allSame = gTrue;
+ for (int i = 0; allSame && i < path->length - 1; ++i) {
+ allSame = path->pts[i].x == path->pts[i + 1].x && path->pts[i].y == path->pts[i + 1].y;
+ }
+ if (allSame) {
+ x0 = path->pts[0].x;
+ y0 = path->pts[0].y;
+ dPath->moveTo(x0, y0);
+ dPath->lineTo(x0, y0);
+ }
+ }
+
+ return dPath;
+}
+
+SplashError Splash::fill(SplashPath *path, GBool eo) {
+ if (debugMode) {
+ printf("fill [eo:%d]:\n", eo);
+ dumpPath(path);
+ }
+ return fillWithPattern(path, eo, state->fillPattern, state->fillAlpha);
+}
+
+inline void Splash::getBBoxFP(SplashPath *path, SplashCoord *xMinA, SplashCoord *yMinA,
+ SplashCoord *xMaxA, SplashCoord *yMaxA) {
+ SplashCoord xMinFP, yMinFP, xMaxFP, yMaxFP, tx, ty;
+
+ // make compiler happy:
+ xMinFP = xMaxFP = yMinFP = yMaxFP = 0;
+ for (int i = 0; i < path->length; ++i) {
+ transform(state->matrix, path->pts[i].x, path->pts[i].y, &tx, &ty);
+ if (i == 0) {
+ xMinFP = xMaxFP = tx;
+ yMinFP = yMaxFP = ty;
+ } else {
+ if (tx < xMinFP) xMinFP = tx;
+ if (tx > xMaxFP) xMaxFP = tx;
+ if (ty < yMinFP) yMinFP = ty;
+ if (ty > yMaxFP) yMaxFP = ty;
+ }
+ }
+
+ *xMinA = xMinFP;
+ *yMinA = yMinFP;
+ *xMaxA = xMaxFP;
+ *yMaxA = yMaxFP;
+}
+
+SplashError Splash::fillWithPattern(SplashPath *path, GBool eo,
+ SplashPattern *pattern,
+ SplashCoord alpha) {
+ SplashPipe pipe;
+ SplashXPath *xPath;
+ SplashXPathScanner *scanner;
+ int xMinI, yMinI, xMaxI, yMaxI, x0, x1, y;
+ SplashClipResult clipRes, clipRes2;
+ GBool adjustLine = gFalse;
+ int linePosI = 0;
+
+ if (path->length == 0) {
+ return splashErrEmptyPath;
+ }
+ if (pathAllOutside(path)) {
+ opClipRes = splashClipAllOutside;
+ return splashOk;
+ }
+
+ // add stroke adjustment hints for filled rectangles -- this only
+ // applies to paths that consist of a single subpath
+ // (this appears to match Acrobat's behavior)
+ if (state->strokeAdjust && !path->hints) {
+ int n;
+ n = path->getLength();
+ if (n == 4 &&
+ !(path->flags[0] & splashPathClosed) &&
+ !(path->flags[1] & splashPathLast) &&
+ !(path->flags[2] & splashPathLast)) {
+ path->close(gTrue);
+ path->addStrokeAdjustHint(0, 2, 0, 4);
+ path->addStrokeAdjustHint(1, 3, 0, 4);
+ } else if (n == 5 &&
+ (path->flags[0] & splashPathClosed) &&
+ !(path->flags[1] & splashPathLast) &&
+ !(path->flags[2] & splashPathLast) &&
+ !(path->flags[3] & splashPathLast)) {
+ path->addStrokeAdjustHint(0, 2, 0, 4);
+ path->addStrokeAdjustHint(1, 3, 0, 4);
+ }
+ }
+
+ if (thinLineMode != splashThinLineDefault) {
+ if (state->clip->getXMinI() == state->clip->getXMaxI()) {
+ linePosI = state->clip->getXMinI();
+ adjustLine = gTrue;
+ } else if (state->clip->getXMinI() == state->clip->getXMaxI() - 1) {
+ adjustLine = gTrue;
+ linePosI = splashFloor(state->clip->getXMin() + state->lineWidth);
+ } else if (state->clip->getYMinI() == state->clip->getYMaxI()) {
+ linePosI = state->clip->getYMinI();
+ adjustLine = gTrue;
+ } else if (state->clip->getYMinI() == state->clip->getYMaxI() - 1) {
+ adjustLine = gTrue;
+ linePosI = splashFloor(state->clip->getYMin() + state->lineWidth);
+ }
+ }
+
+ xPath = new SplashXPath(path, state->matrix, state->flatness, gTrue,
+ adjustLine, linePosI);
+ if (vectorAntialias && !inShading) {
+ xPath->aaScale();
+ }
+ xPath->sort();
+ yMinI = state->clip->getYMinI();
+ yMaxI = state->clip->getYMaxI();
+ if (vectorAntialias && !inShading) {
+ yMinI = yMinI * splashAASize;
+ yMaxI = (yMaxI + 1) * splashAASize - 1;
+ }
+ scanner = new SplashXPathScanner(xPath, eo, yMinI, yMaxI);
+
+ // get the min and max x and y values
+ if (vectorAntialias && !inShading) {
+ scanner->getBBoxAA(&xMinI, &yMinI, &xMaxI, &yMaxI);
+ } else {
+ scanner->getBBox(&xMinI, &yMinI, &xMaxI, &yMaxI);
+ }
+
+ if (eo && (yMinI == yMaxI || xMinI == xMaxI) && thinLineMode != splashThinLineDefault) {
+ SplashCoord delta, xMinFP, yMinFP, xMaxFP, yMaxFP;
+ getBBoxFP(path, &xMinFP, &yMinFP, &xMaxFP, &yMaxFP);
+ delta = (yMinI == yMaxI) ? yMaxFP - yMinFP : xMaxFP - xMinFP;
+ if (delta < 0.2) {
+ opClipRes = splashClipAllOutside;
+ delete scanner;
+ delete xPath;
+ return splashOk;
+ }
+ }
+
+ // check clipping
+ if ((clipRes = state->clip->testRect(xMinI, yMinI, xMaxI, yMaxI))
+ != splashClipAllOutside) {
+ if (scanner->hasPartialClip()) {
+ clipRes = splashClipPartial;
+ }
+
+ pipeInit(&pipe, 0, yMinI, pattern, NULL, (Guchar)splashRound(alpha * 255),
+ vectorAntialias && !inShading, gFalse);
+
+ // draw the spans
+ if (vectorAntialias && !inShading) {
+ for (y = yMinI; y <= yMaxI; ++y) {
+ scanner->renderAALine(aaBuf, &x0, &x1, y, thinLineMode != splashThinLineDefault && xMinI == xMaxI);
+ if (clipRes != splashClipAllInside) {
+ state->clip->clipAALine(aaBuf, &x0, &x1, y, thinLineMode != splashThinLineDefault && xMinI == xMaxI);
+ }
+ Guchar lineShape = 255;
+ GBool adjustLine = gFalse;
+ if (thinLineMode == splashThinLineShape && (xMinI == xMaxI || yMinI == yMaxI)) {
+ // compute line shape for thin lines:
+ SplashCoord mx, my, delta;
+ transform(state->matrix, 0, 0, &mx, &my);
+ transform(state->matrix, state->lineWidth, 0, &delta, &my);
+ adjustLine = gTrue;
+ lineShape = clip255((delta - mx) * 255);
+ }
+ drawAALine(&pipe, x0, x1, y, adjustLine, lineShape);
+ }
+ } else {
+ for (y = yMinI; y <= yMaxI; ++y) {
+ while (scanner->getNextSpan(y, &x0, &x1)) {
+ if (clipRes == splashClipAllInside) {
+ drawSpan(&pipe, x0, x1, y, gTrue);
+ } else {
+ // limit the x range
+ if (x0 < state->clip->getXMinI()) {
+ x0 = state->clip->getXMinI();
+ }
+ if (x1 > state->clip->getXMaxI()) {
+ x1 = state->clip->getXMaxI();
+ }
+ clipRes2 = state->clip->testSpan(x0, x1, y);
+ drawSpan(&pipe, x0, x1, y, clipRes2 == splashClipAllInside);
+ }
+ }
+ }
+ }
+ }
+ opClipRes = clipRes;
+
+ delete scanner;
+ delete xPath;
+ return splashOk;
+}
+
+GBool Splash::pathAllOutside(SplashPath *path) {
+ SplashCoord xMin1, yMin1, xMax1, yMax1;
+ SplashCoord xMin2, yMin2, xMax2, yMax2;
+ SplashCoord x, y;
+ int xMinI, yMinI, xMaxI, yMaxI;
+ int i;
+
+ xMin1 = xMax1 = path->pts[0].x;
+ yMin1 = yMax1 = path->pts[0].y;
+ for (i = 1; i < path->length; ++i) {
+ if (path->pts[i].x < xMin1) {
+ xMin1 = path->pts[i].x;
+ } else if (path->pts[i].x > xMax1) {
+ xMax1 = path->pts[i].x;
+ }
+ if (path->pts[i].y < yMin1) {
+ yMin1 = path->pts[i].y;
+ } else if (path->pts[i].y > yMax1) {
+ yMax1 = path->pts[i].y;
+ }
+ }
+
+ transform(state->matrix, xMin1, yMin1, &x, &y);
+ xMin2 = xMax2 = x;
+ yMin2 = yMax2 = y;
+ transform(state->matrix, xMin1, yMax1, &x, &y);
+ if (x < xMin2) {
+ xMin2 = x;
+ } else if (x > xMax2) {
+ xMax2 = x;
+ }
+ if (y < yMin2) {
+ yMin2 = y;
+ } else if (y > yMax2) {
+ yMax2 = y;
+ }
+ transform(state->matrix, xMax1, yMin1, &x, &y);
+ if (x < xMin2) {
+ xMin2 = x;
+ } else if (x > xMax2) {
+ xMax2 = x;
+ }
+ if (y < yMin2) {
+ yMin2 = y;
+ } else if (y > yMax2) {
+ yMax2 = y;
+ }
+ transform(state->matrix, xMax1, yMax1, &x, &y);
+ if (x < xMin2) {
+ xMin2 = x;
+ } else if (x > xMax2) {
+ xMax2 = x;
+ }
+ if (y < yMin2) {
+ yMin2 = y;
+ } else if (y > yMax2) {
+ yMax2 = y;
+ }
+ xMinI = splashFloor(xMin2);
+ yMinI = splashFloor(yMin2);
+ xMaxI = splashFloor(xMax2);
+ yMaxI = splashFloor(yMax2);
+
+ return state->clip->testRect(xMinI, yMinI, xMaxI, yMaxI) ==
+ splashClipAllOutside;
+}
+
+SplashError Splash::xorFill(SplashPath *path, GBool eo) {
+ SplashPipe pipe;
+ SplashXPath *xPath;
+ SplashXPathScanner *scanner;
+ int xMinI, yMinI, xMaxI, yMaxI, x0, x1, y;
+ SplashClipResult clipRes, clipRes2;
+ SplashBlendFunc origBlendFunc;
+
+ if (path->length == 0) {
+ return splashErrEmptyPath;
+ }
+ xPath = new SplashXPath(path, state->matrix, state->flatness, gTrue);
+ xPath->sort();
+ scanner = new SplashXPathScanner(xPath, eo, state->clip->getYMinI(),
+ state->clip->getYMaxI());
+
+ // get the min and max x and y values
+ scanner->getBBox(&xMinI, &yMinI, &xMaxI, &yMaxI);
+
+ // check clipping
+ if ((clipRes = state->clip->testRect(xMinI, yMinI, xMaxI, yMaxI))
+ != splashClipAllOutside) {
+ if (scanner->hasPartialClip()) {
+ clipRes = splashClipPartial;
+ }
+
+ origBlendFunc = state->blendFunc;
+ state->blendFunc = &blendXor;
+ pipeInit(&pipe, 0, yMinI, state->fillPattern, NULL, 255, gFalse, gFalse);
+
+ // draw the spans
+ for (y = yMinI; y <= yMaxI; ++y) {
+ while (scanner->getNextSpan(y, &x0, &x1)) {
+ if (clipRes == splashClipAllInside) {
+ drawSpan(&pipe, x0, x1, y, gTrue);
+ } else {
+ // limit the x range
+ if (x0 < state->clip->getXMinI()) {
+ x0 = state->clip->getXMinI();
+ }
+ if (x1 > state->clip->getXMaxI()) {
+ x1 = state->clip->getXMaxI();
+ }
+ clipRes2 = state->clip->testSpan(x0, x1, y);
+ drawSpan(&pipe, x0, x1, y, clipRes2 == splashClipAllInside);
+ }
+ }
+ }
+ state->blendFunc = origBlendFunc;
+ }
+ opClipRes = clipRes;
+
+ delete scanner;
+ delete xPath;
+ return splashOk;
+}
+
+SplashError Splash::fillChar(SplashCoord x, SplashCoord y,
+ int c, SplashFont *font) {
+ SplashGlyphBitmap glyph;
+ SplashCoord xt, yt;
+ int x0, y0, xFrac, yFrac;
+ SplashClipResult clipRes;
+
+ if (debugMode) {
+ printf("fillChar: x=%.2f y=%.2f c=%3d=0x%02x='%c'\n",
+ (double)x, (double)y, c, c, c);
+ }
+ transform(state->matrix, x, y, &xt, &yt);
+ x0 = splashFloor(xt);
+ xFrac = splashFloor((xt - x0) * splashFontFraction);
+ y0 = splashFloor(yt);
+ yFrac = splashFloor((yt - y0) * splashFontFraction);
+ if (!font->getGlyph(c, xFrac, yFrac, &glyph, x0, y0, state->clip, &clipRes)) {
+ return splashErrNoGlyph;
+ }
+ if (clipRes != splashClipAllOutside) {
+ fillGlyph2(x0, y0, &glyph, clipRes == splashClipAllInside);
+ }
+ opClipRes = clipRes;
+ if (glyph.freeData) {
+ gfree(glyph.data);
+ }
+ return splashOk;
+}
+
+void Splash::fillGlyph(SplashCoord x, SplashCoord y,
+ SplashGlyphBitmap *glyph) {
+ SplashCoord xt, yt;
+ int x0, y0;
+
+ transform(state->matrix, x, y, &xt, &yt);
+ x0 = splashFloor(xt);
+ y0 = splashFloor(yt);
+ SplashClipResult clipRes = state->clip->testRect(x0 - glyph->x,
+ y0 - glyph->y,
+ x0 - glyph->x + glyph->w - 1,
+ y0 - glyph->y + glyph->h - 1);
+ if (clipRes != splashClipAllOutside) {
+ fillGlyph2(x0, y0, glyph, clipRes == splashClipAllInside);
+ }
+ opClipRes = clipRes;
+}
+
+void Splash::fillGlyph2(int x0, int y0, SplashGlyphBitmap *glyph, GBool noClip) {
+ SplashPipe pipe;
+ int alpha0;
+ Guchar alpha;
+ Guchar *p;
+ int x1, y1, xx, xx1, yy;
+
+ p = glyph->data;
+ int xStart = x0 - glyph->x;
+ int yStart = y0 - glyph->y;
+ int xxLimit = glyph->w;
+ int yyLimit = glyph->h;
+ int xShift = 0;
+
+ if (yStart < 0)
+ {
+ p += (glyph->aa ? glyph->w : splashCeil(glyph->w / 8.0)) * -yStart; // move p to the beginning of the first painted row
+ yyLimit += yStart;
+ yStart = 0;
+ }
+
+ if (xStart < 0)
+ {
+ if (glyph->aa) {
+ p += -xStart;
+ } else {
+ p += (-xStart) / 8;
+ xShift = (-xStart) % 8;
+ }
+ xxLimit += xStart;
+ xStart = 0;
+ }
+
+ if (xxLimit + xStart >= bitmap->width) xxLimit = bitmap->width - xStart;
+ if (yyLimit + yStart >= bitmap->height) yyLimit = bitmap->height - yStart;
+
+ if (noClip) {
+ if (glyph->aa) {
+ pipeInit(&pipe, xStart, yStart,
+ state->fillPattern, NULL, (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) {
+ pipeSetXY(&pipe, xStart, y1);
+ for (xx = 0, x1 = xStart; xx < xxLimit; ++xx, ++x1) {
+ alpha = p[xx];
+ if (alpha != 0) {
+ pipe.shape = alpha;
+ (this->*pipe.run)(&pipe);
+ updateModX(x1);
+ updateModY(y1);
+ } else {
+ pipeIncX(&pipe);
+ }
+ }
+ p += glyph->w;
+ }
+ } else {
+ const int widthEight = splashCeil(glyph->w / 8.0);
+
+ pipeInit(&pipe, xStart, yStart,
+ state->fillPattern, NULL, (Guchar)splashRound(state->fillAlpha * 255), gFalse, gFalse);
+ for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) {
+ pipeSetXY(&pipe, xStart, y1);
+ for (xx = 0, x1 = xStart; xx < xxLimit; xx += 8) {
+ alpha0 = (xShift > 0 ? (p[xx / 8] << xShift) | (p[xx / 8 + 1] >> (8 - xShift)) : p[xx / 8]);
+ for (xx1 = 0; xx1 < 8 && xx + xx1 < xxLimit; ++xx1, ++x1) {
+ if (alpha0 & 0x80) {
+ (this->*pipe.run)(&pipe);
+ updateModX(x1);
+ updateModY(y1);
+ } else {
+ pipeIncX(&pipe);
+ }
+ alpha0 <<= 1;
+ }
+ }
+ p += widthEight;
+ }
+ }
+ } else {
+ if (glyph->aa) {
+ pipeInit(&pipe, xStart, yStart,
+ state->fillPattern, NULL, (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) {
+ pipeSetXY(&pipe, xStart, y1);
+ for (xx = 0, x1 = xStart; xx < xxLimit; ++xx, ++x1) {
+ if (state->clip->test(x1, y1)) {
+ alpha = p[xx];
+ if (alpha != 0) {
+ pipe.shape = alpha;
+ (this->*pipe.run)(&pipe);
+ updateModX(x1);
+ updateModY(y1);
+ } else {
+ pipeIncX(&pipe);
+ }
+ } else {
+ pipeIncX(&pipe);
+ }
+ }
+ p += glyph->w;
+ }
+ } else {
+ const int widthEight = splashCeil(glyph->w / 8.0);
+
+ pipeInit(&pipe, xStart, yStart,
+ state->fillPattern, NULL, (Guchar)splashRound(state->fillAlpha * 255), gFalse, gFalse);
+ for (yy = 0, y1 = yStart; yy < yyLimit; ++yy, ++y1) {
+ pipeSetXY(&pipe, xStart, y1);
+ for (xx = 0, x1 = xStart; xx < xxLimit; xx += 8) {
+ alpha0 = (xShift > 0 ? (p[xx / 8] << xShift) | (p[xx / 8 + 1] >> (8 - xShift)) : p[xx / 8]);
+ for (xx1 = 0; xx1 < 8 && xx + xx1 < xxLimit; ++xx1, ++x1) {
+ if (state->clip->test(x1, y1)) {
+ if (alpha0 & 0x80) {
+ (this->*pipe.run)(&pipe);
+ updateModX(x1);
+ updateModY(y1);
+ } else {
+ pipeIncX(&pipe);
+ }
+ } else {
+ pipeIncX(&pipe);
+ }
+ alpha0 <<= 1;
+ }
+ }
+ p += widthEight;
+ }
+ }
+ }
+}
+
+SplashError Splash::fillImageMask(SplashImageMaskSource src, void *srcData,
+ int w, int h, SplashCoord *mat,
+ GBool glyphMode) {
+ SplashBitmap *scaledMask;
+ SplashClipResult clipRes;
+ GBool minorAxisZero;
+ int x0, y0, x1, y1, scaledWidth, scaledHeight;
+ int yp;
+
+ if (debugMode) {
+ printf("fillImageMask: w=%d h=%d mat=[%.2f %.2f %.2f %.2f %.2f %.2f]\n",
+ w, h, (double)mat[0], (double)mat[1], (double)mat[2],
+ (double)mat[3], (double)mat[4], (double)mat[5]);
+ }
+
+ if (w == 0 && h == 0) return splashErrZeroImage;
+
+ // check for singular matrix
+ if (!splashCheckDet(mat[0], mat[1], mat[2], mat[3], 0.000001)) {
+ return splashErrSingularMatrix;
+ }
+
+ minorAxisZero = mat[1] == 0 && mat[2] == 0;
+
+ // scaling only
+ if (mat[0] > 0 && minorAxisZero && mat[3] > 0) {
+ x0 = imgCoordMungeLowerC(mat[4], glyphMode);
+ y0 = imgCoordMungeLowerC(mat[5], glyphMode);
+ x1 = imgCoordMungeUpperC(mat[0] + mat[4], glyphMode);
+ y1 = imgCoordMungeUpperC(mat[3] + mat[5], glyphMode);
+ // make sure narrow images cover at least one pixel
+ if (x0 == x1) {
+ ++x1;
+ }
+ if (y0 == y1) {
+ ++y1;
+ }
+ clipRes = state->clip->testRect(x0, y0, x1 - 1, y1 - 1);
+ opClipRes = clipRes;
+ if (clipRes != splashClipAllOutside) {
+ scaledWidth = x1 - x0;
+ scaledHeight = y1 - y0;
+ yp = h / scaledHeight;
+ if (yp < 0 || yp > INT_MAX - 1) {
+ return splashErrBadArg;
+ }
+ scaledMask = scaleMask(src, srcData, w, h, scaledWidth, scaledHeight);
+ blitMask(scaledMask, x0, y0, clipRes);
+ delete scaledMask;
+ }
+
+ // scaling plus vertical flip
+ } else if (mat[0] > 0 && minorAxisZero && mat[3] < 0) {
+ x0 = imgCoordMungeLowerC(mat[4], glyphMode);
+ y0 = imgCoordMungeLowerC(mat[3] + mat[5], glyphMode);
+ x1 = imgCoordMungeUpperC(mat[0] + mat[4], glyphMode);
+ y1 = imgCoordMungeUpperC(mat[5], glyphMode);
+ // make sure narrow images cover at least one pixel
+ if (x0 == x1) {
+ ++x1;
+ }
+ if (y0 == y1) {
+ ++y1;
+ }
+ clipRes = state->clip->testRect(x0, y0, x1 - 1, y1 - 1);
+ opClipRes = clipRes;
+ if (clipRes != splashClipAllOutside) {
+ scaledWidth = x1 - x0;
+ scaledHeight = y1 - y0;
+ yp = h / scaledHeight;
+ if (yp < 0 || yp > INT_MAX - 1) {
+ return splashErrBadArg;
+ }
+ scaledMask = scaleMask(src, srcData, w, h, scaledWidth, scaledHeight);
+ vertFlipImage(scaledMask, scaledWidth, scaledHeight, 1);
+ blitMask(scaledMask, x0, y0, clipRes);
+ delete scaledMask;
+ }
+
+ // all other cases
+ } else {
+ arbitraryTransformMask(src, srcData, w, h, mat, glyphMode);
+ }
+
+ return splashOk;
+}
+
+void Splash::arbitraryTransformMask(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ SplashCoord *mat, GBool glyphMode) {
+ SplashBitmap *scaledMask;
+ SplashClipResult clipRes, clipRes2;
+ SplashPipe pipe;
+ int scaledWidth, scaledHeight, t0, t1;
+ SplashCoord r00, r01, r10, r11, det, ir00, ir01, ir10, ir11;
+ SplashCoord vx[4], vy[4];
+ int xMin, yMin, xMax, yMax;
+ ImageSection section[3];
+ int nSections;
+ int y, xa, xb, x, i, xx, yy;
+
+ // compute the four vertices of the target quadrilateral
+ vx[0] = mat[4]; vy[0] = mat[5];
+ vx[1] = mat[2] + mat[4]; vy[1] = mat[3] + mat[5];
+ vx[2] = mat[0] + mat[2] + mat[4]; vy[2] = mat[1] + mat[3] + mat[5];
+ vx[3] = mat[0] + mat[4]; vy[3] = mat[1] + mat[5];
+
+ // clipping
+ xMin = imgCoordMungeLowerC(vx[0], glyphMode);
+ xMax = imgCoordMungeUpperC(vx[0], glyphMode);
+ yMin = imgCoordMungeLowerC(vy[0], glyphMode);
+ yMax = imgCoordMungeUpperC(vy[0], glyphMode);
+ for (i = 1; i < 4; ++i) {
+ t0 = imgCoordMungeLowerC(vx[i], glyphMode);
+ if (t0 < xMin) {
+ xMin = t0;
+ }
+ t0 = imgCoordMungeUpperC(vx[i], glyphMode);
+ if (t0 > xMax) {
+ xMax = t0;
+ }
+ t1 = imgCoordMungeLowerC(vy[i], glyphMode);
+ if (t1 < yMin) {
+ yMin = t1;
+ }
+ t1 = imgCoordMungeUpperC(vy[i], glyphMode);
+ if (t1 > yMax) {
+ yMax = t1;
+ }
+ }
+ clipRes = state->clip->testRect(xMin, yMin, xMax - 1, yMax - 1);
+ opClipRes = clipRes;
+ if (clipRes == splashClipAllOutside) {
+ return;
+ }
+
+ // compute the scale factors
+ if (mat[0] >= 0) {
+ t0 = imgCoordMungeUpperC(mat[0] + mat[4], glyphMode) -
+ imgCoordMungeLowerC(mat[4], glyphMode);
+ } else {
+ t0 = imgCoordMungeUpperC(mat[4], glyphMode) -
+ imgCoordMungeLowerC(mat[0] + mat[4], glyphMode);
+ }
+ if (mat[1] >= 0) {
+ t1 = imgCoordMungeUpperC(mat[1] + mat[5], glyphMode) -
+ imgCoordMungeLowerC(mat[5], glyphMode);
+ } else {
+ t1 = imgCoordMungeUpperC(mat[5], glyphMode) -
+ imgCoordMungeLowerC(mat[1] + mat[5], glyphMode);
+ }
+ scaledWidth = t0 > t1 ? t0 : t1;
+ if (mat[2] >= 0) {
+ t0 = imgCoordMungeUpperC(mat[2] + mat[4], glyphMode) -
+ imgCoordMungeLowerC(mat[4], glyphMode);
+ } else {
+ t0 = imgCoordMungeUpperC(mat[4], glyphMode) -
+ imgCoordMungeLowerC(mat[2] + mat[4], glyphMode);
+ }
+ if (mat[3] >= 0) {
+ t1 = imgCoordMungeUpperC(mat[3] + mat[5], glyphMode) -
+ imgCoordMungeLowerC(mat[5], glyphMode);
+ } else {
+ t1 = imgCoordMungeUpperC(mat[5], glyphMode) -
+ imgCoordMungeLowerC(mat[3] + mat[5], glyphMode);
+ }
+ scaledHeight = t0 > t1 ? t0 : t1;
+ if (scaledWidth == 0) {
+ scaledWidth = 1;
+ }
+ if (scaledHeight == 0) {
+ scaledHeight = 1;
+ }
+
+ // compute the inverse transform (after scaling) matrix
+ r00 = mat[0] / scaledWidth;
+ r01 = mat[1] / scaledWidth;
+ r10 = mat[2] / scaledHeight;
+ r11 = mat[3] / scaledHeight;
+ det = r00 * r11 - r01 * r10;
+ if (splashAbs(det) < 1e-6) {
+ // this should be caught by the singular matrix check in fillImageMask
+ return;
+ }
+ ir00 = r11 / det;
+ ir01 = -r01 / det;
+ ir10 = -r10 / det;
+ ir11 = r00 / det;
+
+ // scale the input image
+ scaledMask = scaleMask(src, srcData, srcWidth, srcHeight,
+ scaledWidth, scaledHeight);
+ if (scaledMask->data == NULL) {
+ error(errInternal, -1, "scaledMask->data is NULL in Splash::arbitraryTransformMask");
+ delete scaledMask;
+ return;
+ }
+
+ // construct the three sections
+ i = (vy[2] <= vy[3]) ? 2 : 3;
+ if (vy[1] <= vy[i]) {
+ i = 1;
+ }
+ if (vy[0] < vy[i] || (i != 3 && vy[0] == vy[i])) {
+ i = 0;
+ }
+ if (vy[i] == vy[(i+1) & 3]) {
+ section[0].y0 = imgCoordMungeLowerC(vy[i], glyphMode);
+ section[0].y1 = imgCoordMungeUpperC(vy[(i+2) & 3], glyphMode) - 1;
+ if (vx[i] < vx[(i+1) & 3]) {
+ section[0].ia0 = i;
+ section[0].ia1 = (i+3) & 3;
+ section[0].ib0 = (i+1) & 3;
+ section[0].ib1 = (i+2) & 3;
+ } else {
+ section[0].ia0 = (i+1) & 3;
+ section[0].ia1 = (i+2) & 3;
+ section[0].ib0 = i;
+ section[0].ib1 = (i+3) & 3;
+ }
+ nSections = 1;
+ } else {
+ section[0].y0 = imgCoordMungeLowerC(vy[i], glyphMode);
+ section[2].y1 = imgCoordMungeUpperC(vy[(i+2) & 3], glyphMode) - 1;
+ section[0].ia0 = section[0].ib0 = i;
+ section[2].ia1 = section[2].ib1 = (i+2) & 3;
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[0].ia1 = section[2].ia0 = (i+1) & 3;
+ section[0].ib1 = section[2].ib0 = (i+3) & 3;
+ } else {
+ section[0].ia1 = section[2].ia0 = (i+3) & 3;
+ section[0].ib1 = section[2].ib0 = (i+1) & 3;
+ }
+ if (vy[(i+1) & 3] < vy[(i+3) & 3]) {
+ section[1].y0 = imgCoordMungeLowerC(vy[(i+1) & 3], glyphMode);
+ section[2].y0 = imgCoordMungeUpperC(vy[(i+3) & 3], glyphMode);
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[1].ia0 = (i+1) & 3;
+ section[1].ia1 = (i+2) & 3;
+ section[1].ib0 = i;
+ section[1].ib1 = (i+3) & 3;
+ } else {
+ section[1].ia0 = i;
+ section[1].ia1 = (i+3) & 3;
+ section[1].ib0 = (i+1) & 3;
+ section[1].ib1 = (i+2) & 3;
+ }
+ } else {
+ section[1].y0 = imgCoordMungeLowerC(vy[(i+3) & 3], glyphMode);
+ section[2].y0 = imgCoordMungeUpperC(vy[(i+1) & 3], glyphMode);
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[1].ia0 = i;
+ section[1].ia1 = (i+1) & 3;
+ section[1].ib0 = (i+3) & 3;
+ section[1].ib1 = (i+2) & 3;
+ } else {
+ section[1].ia0 = (i+3) & 3;
+ section[1].ia1 = (i+2) & 3;
+ section[1].ib0 = i;
+ section[1].ib1 = (i+1) & 3;
+ }
+ }
+ section[0].y1 = section[1].y0 - 1;
+ section[1].y1 = section[2].y0 - 1;
+ nSections = 3;
+ }
+ for (i = 0; i < nSections; ++i) {
+ section[i].xa0 = vx[section[i].ia0];
+ section[i].ya0 = vy[section[i].ia0];
+ section[i].xa1 = vx[section[i].ia1];
+ section[i].ya1 = vy[section[i].ia1];
+ section[i].xb0 = vx[section[i].ib0];
+ section[i].yb0 = vy[section[i].ib0];
+ section[i].xb1 = vx[section[i].ib1];
+ section[i].yb1 = vy[section[i].ib1];
+ section[i].dxdya = (section[i].xa1 - section[i].xa0) /
+ (section[i].ya1 - section[i].ya0);
+ section[i].dxdyb = (section[i].xb1 - section[i].xb0) /
+ (section[i].yb1 - section[i].yb0);
+ }
+
+ // initialize the pixel pipe
+ pipeInit(&pipe, 0, 0, state->fillPattern, NULL,
+ (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ if (vectorAntialias) {
+ drawAAPixelInit();
+ }
+
+ // make sure narrow images cover at least one pixel
+ if (nSections == 1) {
+ if (section[0].y0 == section[0].y1) {
+ ++section[0].y1;
+ clipRes = opClipRes = splashClipPartial;
+ }
+ } else {
+ if (section[0].y0 == section[2].y1) {
+ ++section[1].y1;
+ clipRes = opClipRes = splashClipPartial;
+ }
+ }
+
+ // scan all pixels inside the target region
+ for (i = 0; i < nSections; ++i) {
+ for (y = section[i].y0; y <= section[i].y1; ++y) {
+ xa = imgCoordMungeLowerC(section[i].xa0 +
+ ((SplashCoord)y + 0.5 - section[i].ya0) *
+ section[i].dxdya,
+ glyphMode);
+ xb = imgCoordMungeUpperC(section[i].xb0 +
+ ((SplashCoord)y + 0.5 - section[i].yb0) *
+ section[i].dxdyb,
+ glyphMode);
+ // make sure narrow images cover at least one pixel
+ if (xa == xb) {
+ ++xb;
+ }
+ if (clipRes != splashClipAllInside) {
+ clipRes2 = state->clip->testSpan(xa, xb - 1, y);
+ } else {
+ clipRes2 = clipRes;
+ }
+ for (x = xa; x < xb; ++x) {
+ // map (x+0.5, y+0.5) back to the scaled image
+ xx = splashFloor(((SplashCoord)x + 0.5 - mat[4]) * ir00 +
+ ((SplashCoord)y + 0.5 - mat[5]) * ir10);
+ yy = splashFloor(((SplashCoord)x + 0.5 - mat[4]) * ir01 +
+ ((SplashCoord)y + 0.5 - mat[5]) * ir11);
+ // xx should always be within bounds, but floating point
+ // inaccuracy can cause problems
+ if (xx < 0) {
+ xx = 0;
+ } else if (xx >= scaledWidth) {
+ xx = scaledWidth - 1;
+ }
+ if (yy < 0) {
+ yy = 0;
+ } else if (yy >= scaledHeight) {
+ yy = scaledHeight - 1;
+ }
+ pipe.shape = scaledMask->data[yy * scaledWidth + xx];
+ if (vectorAntialias && clipRes2 != splashClipAllInside) {
+ drawAAPixel(&pipe, x, y);
+ } else {
+ drawPixel(&pipe, x, y, clipRes2 == splashClipAllInside);
+ }
+ }
+ }
+ }
+
+ delete scaledMask;
+}
+
+// Scale an image mask into a SplashBitmap.
+SplashBitmap *Splash::scaleMask(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight) {
+ SplashBitmap *dest;
+
+ dest = new SplashBitmap(scaledWidth, scaledHeight, 1, splashModeMono8,
+ gFalse);
+ if (scaledHeight < srcHeight) {
+ if (scaledWidth < srcWidth) {
+ scaleMaskYdXd(src, srcData, srcWidth, srcHeight,
+ scaledWidth, scaledHeight, dest);
+ } else {
+ scaleMaskYdXu(src, srcData, srcWidth, srcHeight,
+ scaledWidth, scaledHeight, dest);
+ }
+ } else {
+ if (scaledWidth < srcWidth) {
+ scaleMaskYuXd(src, srcData, srcWidth, srcHeight,
+ scaledWidth, scaledHeight, dest);
+ } else {
+ scaleMaskYuXu(src, srcData, srcWidth, srcHeight,
+ scaledWidth, scaledHeight, dest);
+ }
+ }
+ return dest;
+}
+
+void Splash::scaleMaskYdXd(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf;
+ Guint *pixBuf;
+ Guint pix;
+ Guchar *destPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, d, d0, d1;
+ int i, j;
+
+ // Bresenham parameters for y scale
+ yp = srcHeight / scaledHeight;
+ yq = srcHeight % scaledHeight;
+
+ // Bresenham parameters for x scale
+ xp = srcWidth / scaledWidth;
+ xq = srcWidth % scaledWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmalloc(srcWidth);
+ pixBuf = (Guint *)gmallocn(srcWidth, sizeof(int));
+
+ // init y scale Bresenham
+ yt = 0;
+
+ destPtr = dest->data;
+ for (y = 0; y < scaledHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= scaledHeight) {
+ yt -= scaledHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read rows from image
+ memset(pixBuf, 0, srcWidth * sizeof(int));
+ for (i = 0; i < yStep; ++i) {
+ (*src)(srcData, lineBuf);
+ for (j = 0; j < srcWidth; ++j) {
+ pixBuf[j] += lineBuf[j];
+ }
+ }
+
+ // init x scale Bresenham
+ xt = 0;
+ d0 = (255 << 23) / (yStep * xp);
+ d1 = (255 << 23) / (yStep * (xp + 1));
+
+ xx = 0;
+ for (x = 0; x < scaledWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= scaledWidth) {
+ xt -= scaledWidth;
+ xStep = xp + 1;
+ d = d1;
+ } else {
+ xStep = xp;
+ d = d0;
+ }
+
+ // compute the final pixel
+ pix = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix += pixBuf[xx++];
+ }
+ // (255 * pix) / xStep * yStep
+ pix = (pix * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix;
+ }
+ }
+
+ gfree(pixBuf);
+ gfree(lineBuf);
+}
+
+void Splash::scaleMaskYdXu(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf;
+ Guint *pixBuf;
+ Guint pix;
+ Guchar *destPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, d;
+ int i, j;
+
+ destPtr = dest->data;
+ if (destPtr == NULL) {
+ error(errInternal, -1, "dest->data is NULL in Splash::scaleMaskYdXu");
+ return;
+ }
+
+ // Bresenham parameters for y scale
+ yp = srcHeight / scaledHeight;
+ yq = srcHeight % scaledHeight;
+
+ // Bresenham parameters for x scale
+ xp = scaledWidth / srcWidth;
+ xq = scaledWidth % srcWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmalloc(srcWidth);
+ pixBuf = (Guint *)gmallocn(srcWidth, sizeof(int));
+
+ // init y scale Bresenham
+ yt = 0;
+
+ for (y = 0; y < scaledHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= scaledHeight) {
+ yt -= scaledHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read rows from image
+ memset(pixBuf, 0, srcWidth * sizeof(int));
+ for (i = 0; i < yStep; ++i) {
+ (*src)(srcData, lineBuf);
+ for (j = 0; j < srcWidth; ++j) {
+ pixBuf[j] += lineBuf[j];
+ }
+ }
+
+ // init x scale Bresenham
+ xt = 0;
+ d = (255 << 23) / yStep;
+
+ for (x = 0; x < srcWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= srcWidth) {
+ xt -= srcWidth;
+ xStep = xp + 1;
+ } else {
+ xStep = xp;
+ }
+
+ // compute the final pixel
+ pix = pixBuf[x];
+ // (255 * pix) / yStep
+ pix = (pix * d) >> 23;
+
+ // store the pixel
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix;
+ }
+ }
+ }
+
+ gfree(pixBuf);
+ gfree(lineBuf);
+}
+
+void Splash::scaleMaskYuXd(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf;
+ Guint pix;
+ Guchar *destPtr0, *destPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, d, d0, d1;
+ int i;
+
+ destPtr0 = dest->data;
+ if (destPtr0 == NULL) {
+ error(errInternal, -1, "dest->data is NULL in Splash::scaleMaskYuXd");
+ return;
+ }
+
+ // Bresenham parameters for y scale
+ yp = scaledHeight / srcHeight;
+ yq = scaledHeight % srcHeight;
+
+ // Bresenham parameters for x scale
+ xp = srcWidth / scaledWidth;
+ xq = srcWidth % scaledWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmalloc(srcWidth);
+
+ // init y scale Bresenham
+ yt = 0;
+
+ for (y = 0; y < srcHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= srcHeight) {
+ yt -= srcHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read row from image
+ (*src)(srcData, lineBuf);
+
+ // init x scale Bresenham
+ xt = 0;
+ d0 = (255 << 23) / xp;
+ d1 = (255 << 23) / (xp + 1);
+
+ xx = 0;
+ for (x = 0; x < scaledWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= scaledWidth) {
+ xt -= scaledWidth;
+ xStep = xp + 1;
+ d = d1;
+ } else {
+ xStep = xp;
+ d = d0;
+ }
+
+ // compute the final pixel
+ pix = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix += lineBuf[xx++];
+ }
+ // (255 * pix) / xStep
+ pix = (pix * d) >> 23;
+
+ // store the pixel
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + i * scaledWidth + x;
+ *destPtr = (Guchar)pix;
+ }
+ }
+
+ destPtr0 += yStep * scaledWidth;
+ }
+
+ gfree(lineBuf);
+}
+
+void Splash::scaleMaskYuXu(SplashImageMaskSource src, void *srcData,
+ int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf;
+ Guint pix;
+ Guchar *destPtr0, *destPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx;
+ int i, j;
+
+ destPtr0 = dest->data;
+ if (destPtr0 == NULL) {
+ error(errInternal, -1, "dest->data is NULL in Splash::scaleMaskYuXu");
+ return;
+ }
+
+ // Bresenham parameters for y scale
+ yp = scaledHeight / srcHeight;
+ yq = scaledHeight % srcHeight;
+
+ // Bresenham parameters for x scale
+ xp = scaledWidth / srcWidth;
+ xq = scaledWidth % srcWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmalloc(srcWidth);
+
+ // init y scale Bresenham
+ yt = 0;
+
+ for (y = 0; y < srcHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= srcHeight) {
+ yt -= srcHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read row from image
+ (*src)(srcData, lineBuf);
+
+ // init x scale Bresenham
+ xt = 0;
+
+ xx = 0;
+ for (x = 0; x < srcWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= srcWidth) {
+ xt -= srcWidth;
+ xStep = xp + 1;
+ } else {
+ xStep = xp;
+ }
+
+ // compute the final pixel
+ pix = lineBuf[x] ? 255 : 0;
+
+ // store the pixel
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + i * scaledWidth + xx + j;
+ *destPtr++ = (Guchar)pix;
+ }
+ }
+
+ xx += xStep;
+ }
+
+ destPtr0 += yStep * scaledWidth;
+ }
+
+ gfree(lineBuf);
+}
+
+void Splash::blitMask(SplashBitmap *src, int xDest, int yDest,
+ SplashClipResult clipRes) {
+ SplashPipe pipe;
+ Guchar *p;
+ int w, h, x, y;
+
+ w = src->getWidth();
+ h = src->getHeight();
+ p = src->getDataPtr();
+ if (p == NULL) {
+ error(errInternal, -1, "src->getDataPtr() is NULL in Splash::blitMask");
+ return;
+ }
+ if (vectorAntialias && clipRes != splashClipAllInside) {
+ pipeInit(&pipe, xDest, yDest, state->fillPattern, NULL,
+ (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ drawAAPixelInit();
+ for (y = 0; y < h; ++y) {
+ for (x = 0; x < w; ++x) {
+ pipe.shape = *p++;
+ drawAAPixel(&pipe, xDest + x, yDest + y);
+ }
+ }
+ } else {
+ pipeInit(&pipe, xDest, yDest, state->fillPattern, NULL,
+ (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ if (clipRes == splashClipAllInside) {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ if (*p) {
+ pipe.shape = *p;
+ (this->*pipe.run)(&pipe);
+ } else {
+ pipeIncX(&pipe);
+ }
+ ++p;
+ }
+ }
+ updateModX(xDest);
+ updateModX(xDest + w - 1);
+ updateModY(yDest);
+ updateModY(yDest + h - 1);
+ } else {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ if (*p && state->clip->test(xDest + x, yDest + y)) {
+ pipe.shape = *p;
+ (this->*pipe.run)(&pipe);
+ updateModX(xDest + x);
+ updateModY(yDest + y);
+ } else {
+ pipeIncX(&pipe);
+ }
+ ++p;
+ }
+ }
+ }
+ }
+}
+
+SplashError Splash::drawImage(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, GBool srcAlpha,
+ int w, int h, SplashCoord *mat, GBool interpolate,
+ GBool tilingPattern) {
+ GBool ok;
+ SplashBitmap *scaledImg;
+ SplashClipResult clipRes;
+ GBool minorAxisZero;
+ int x0, y0, x1, y1, scaledWidth, scaledHeight;
+ int nComps;
+ int yp;
+
+ if (debugMode) {
+ printf("drawImage: srcMode=%d srcAlpha=%d w=%d h=%d mat=[%.2f %.2f %.2f %.2f %.2f %.2f]\n",
+ srcMode, srcAlpha, w, h, (double)mat[0], (double)mat[1], (double)mat[2],
+ (double)mat[3], (double)mat[4], (double)mat[5]);
+ }
+
+ // check color modes
+ ok = gFalse; // make gcc happy
+ nComps = 0; // make gcc happy
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ case splashModeMono8:
+ ok = srcMode == splashModeMono8;
+ nComps = 1;
+ break;
+ case splashModeRGB8:
+ ok = srcMode == splashModeRGB8;
+ nComps = 3;
+ break;
+ case splashModeXBGR8:
+ ok = srcMode == splashModeXBGR8;
+ nComps = 4;
+ break;
+ case splashModeBGR8:
+ ok = srcMode == splashModeBGR8;
+ nComps = 3;
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ ok = srcMode == splashModeCMYK8;
+ nComps = 4;
+ break;
+ case splashModeDeviceN8:
+ ok = srcMode == splashModeDeviceN8;
+ nComps = SPOT_NCOMPS+4;
+ break;
+#endif
+ default:
+ ok = gFalse;
+ break;
+ }
+ if (!ok) {
+ return splashErrModeMismatch;
+ }
+
+ // check for singular matrix
+ if (!splashCheckDet(mat[0], mat[1], mat[2], mat[3], 0.000001)) {
+ return splashErrSingularMatrix;
+ }
+
+ minorAxisZero = mat[1] == 0 && mat[2] == 0;
+
+ // scaling only
+ if (mat[0] > 0 && minorAxisZero && mat[3] > 0) {
+ x0 = imgCoordMungeLower(mat[4]);
+ y0 = imgCoordMungeLower(mat[5]);
+ x1 = imgCoordMungeUpper(mat[0] + mat[4]);
+ y1 = imgCoordMungeUpper(mat[3] + mat[5]);
+ // make sure narrow images cover at least one pixel
+ if (x0 == x1) {
+ ++x1;
+ }
+ if (y0 == y1) {
+ ++y1;
+ }
+ clipRes = state->clip->testRect(x0, y0, x1 - 1, y1 - 1);
+ opClipRes = clipRes;
+ if (clipRes != splashClipAllOutside) {
+ scaledWidth = x1 - x0;
+ scaledHeight = y1 - y0;
+ yp = h / scaledHeight;
+ if (yp < 0 || yp > INT_MAX - 1) {
+ return splashErrBadArg;
+ }
+ scaledImg = scaleImage(src, srcData, srcMode, nComps, srcAlpha, w, h,
+ scaledWidth, scaledHeight, interpolate, tilingPattern);
+ if (scaledImg == NULL) {
+ return splashErrBadArg;
+ }
+ blitImage(scaledImg, srcAlpha, x0, y0, clipRes);
+ delete scaledImg;
+ }
+
+ // scaling plus vertical flip
+ } else if (mat[0] > 0 && minorAxisZero && mat[3] < 0) {
+ x0 = imgCoordMungeLower(mat[4]);
+ y0 = imgCoordMungeLower(mat[3] + mat[5]);
+ x1 = imgCoordMungeUpper(mat[0] + mat[4]);
+ y1 = imgCoordMungeUpper(mat[5]);
+ if (x0 == x1) {
+ if (mat[4] + mat[0] * 0.5 < x0) {
+ --x0;
+ } else {
+ ++x1;
+ }
+ }
+ if (y0 == y1) {
+ if (mat[5] + mat[1] * 0.5 < y0) {
+ --y0;
+ } else {
+ ++y1;
+ }
+ }
+ clipRes = state->clip->testRect(x0, y0, x1 - 1, y1 - 1);
+ opClipRes = clipRes;
+ if (clipRes != splashClipAllOutside) {
+ scaledWidth = x1 - x0;
+ scaledHeight = y1 - y0;
+ yp = h / scaledHeight;
+ if (yp < 0 || yp > INT_MAX - 1) {
+ return splashErrBadArg;
+ }
+ scaledImg = scaleImage(src, srcData, srcMode, nComps, srcAlpha, w, h,
+ scaledWidth, scaledHeight, interpolate, tilingPattern);
+ if (scaledImg == NULL) {
+ return splashErrBadArg;
+ }
+ vertFlipImage(scaledImg, scaledWidth, scaledHeight, nComps);
+ blitImage(scaledImg, srcAlpha, x0, y0, clipRes);
+ delete scaledImg;
+ }
+
+ // all other cases
+ } else {
+ return arbitraryTransformImage(src, srcData, srcMode, nComps, srcAlpha,
+ w, h, mat, interpolate, tilingPattern);
+ }
+
+ return splashOk;
+}
+
+SplashError Splash::arbitraryTransformImage(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha,
+ int srcWidth, int srcHeight,
+ SplashCoord *mat, GBool interpolate,
+ GBool tilingPattern) {
+ SplashBitmap *scaledImg;
+ SplashClipResult clipRes, clipRes2;
+ SplashPipe pipe;
+ SplashColor pixel;
+ int scaledWidth, scaledHeight, t0, t1, th;
+ SplashCoord r00, r01, r10, r11, det, ir00, ir01, ir10, ir11;
+ SplashCoord vx[4], vy[4];
+ int xMin, yMin, xMax, yMax;
+ ImageSection section[3];
+ int nSections;
+ int y, xa, xb, x, i, xx, yy, yp;
+
+ // compute the four vertices of the target quadrilateral
+ vx[0] = mat[4]; vy[0] = mat[5];
+ vx[1] = mat[2] + mat[4]; vy[1] = mat[3] + mat[5];
+ vx[2] = mat[0] + mat[2] + mat[4]; vy[2] = mat[1] + mat[3] + mat[5];
+ vx[3] = mat[0] + mat[4]; vy[3] = mat[1] + mat[5];
+
+ // clipping
+ xMin = imgCoordMungeLower(vx[0]);
+ xMax = imgCoordMungeUpper(vx[0]);
+ yMin = imgCoordMungeLower(vy[0]);
+ yMax = imgCoordMungeUpper(vy[0]);
+ for (i = 1; i < 4; ++i) {
+ t0 = imgCoordMungeLower(vx[i]);
+ if (t0 < xMin) {
+ xMin = t0;
+ }
+ t0 = imgCoordMungeUpper(vx[i]);
+ if (t0 > xMax) {
+ xMax = t0;
+ }
+ t1 = imgCoordMungeLower(vy[i]);
+ if (t1 < yMin) {
+ yMin = t1;
+ }
+ t1 = imgCoordMungeUpper(vy[i]);
+ if (t1 > yMax) {
+ yMax = t1;
+ }
+ }
+ clipRes = state->clip->testRect(xMin, yMin, xMax, yMax);
+ opClipRes = clipRes;
+ if (clipRes == splashClipAllOutside) {
+ return splashOk;
+ }
+
+ // compute the scale factors
+ if (splashAbs(mat[0]) >= splashAbs(mat[1])) {
+ scaledWidth = xMax - xMin;
+ scaledHeight = yMax - yMin;
+ } else {
+ scaledWidth = yMax - yMin;
+ scaledHeight = xMax - xMin;
+ }
+ if (scaledHeight <= 1 || scaledWidth <= 1 || tilingPattern) {
+ if (mat[0] >= 0) {
+ t0 = imgCoordMungeUpper(mat[0] + mat[4]) - imgCoordMungeLower(mat[4]);
+ } else {
+ t0 = imgCoordMungeUpper(mat[4]) - imgCoordMungeLower(mat[0] + mat[4]);
+ }
+ if (mat[1] >= 0) {
+ t1 = imgCoordMungeUpper(mat[1] + mat[5]) - imgCoordMungeLower(mat[5]);
+ } else {
+ t1 = imgCoordMungeUpper(mat[5]) - imgCoordMungeLower(mat[1] + mat[5]);
+ }
+ scaledWidth = t0 > t1 ? t0 : t1;
+ if (mat[2] >= 0) {
+ t0 = imgCoordMungeUpper(mat[2] + mat[4]) - imgCoordMungeLower(mat[4]);
+ if (splashAbs(mat[1]) >= 1) {
+ th = imgCoordMungeUpper(mat[2]) - imgCoordMungeLower(mat[0] * mat[3] / mat[1]);
+ if (th > t0) t0 = th;
+ }
+ } else {
+ t0 = imgCoordMungeUpper(mat[4]) - imgCoordMungeLower(mat[2] + mat[4]);
+ if (splashAbs(mat[1]) >= 1) {
+ th = imgCoordMungeUpper(mat[0] * mat[3] / mat[1]) - imgCoordMungeLower(mat[2]);
+ if (th > t0) t0 = th;
+ }
+ }
+ if (mat[3] >= 0) {
+ t1 = imgCoordMungeUpper(mat[3] + mat[5]) - imgCoordMungeLower(mat[5]);
+ if (splashAbs(mat[0]) >= 1) {
+ th = imgCoordMungeUpper(mat[3]) - imgCoordMungeLower(mat[1] * mat[2] / mat[0]);
+ if (th > t1) t1 = th;
+ }
+ } else {
+ t1 = imgCoordMungeUpper(mat[5]) - imgCoordMungeLower(mat[3] + mat[5]);
+ if (splashAbs(mat[0]) >= 1) {
+ th = imgCoordMungeUpper(mat[1] * mat[2] / mat[0]) - imgCoordMungeLower(mat[3]);
+ if (th > t1) t1 = th;
+ }
+ }
+ scaledHeight = t0 > t1 ? t0 : t1;
+ }
+ if (scaledWidth == 0) {
+ scaledWidth = 1;
+ }
+ if (scaledHeight == 0) {
+ scaledHeight = 1;
+ }
+
+ // compute the inverse transform (after scaling) matrix
+ r00 = mat[0] / scaledWidth;
+ r01 = mat[1] / scaledWidth;
+ r10 = mat[2] / scaledHeight;
+ r11 = mat[3] / scaledHeight;
+ det = r00 * r11 - r01 * r10;
+ if (splashAbs(det) < 1e-6) {
+ // this should be caught by the singular matrix check in drawImage
+ return splashErrBadArg;
+ }
+ ir00 = r11 / det;
+ ir01 = -r01 / det;
+ ir10 = -r10 / det;
+ ir11 = r00 / det;
+
+ // scale the input image
+ yp = srcHeight / scaledHeight;
+ if (yp < 0 || yp > INT_MAX - 1) {
+ return splashErrBadArg;
+ }
+ scaledImg = scaleImage(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, interpolate);
+
+ if (scaledImg == NULL) {
+ return splashErrBadArg;
+ }
+
+ // construct the three sections
+ i = 0;
+ if (vy[1] < vy[i]) {
+ i = 1;
+ }
+ if (vy[2] < vy[i]) {
+ i = 2;
+ }
+ if (vy[3] < vy[i]) {
+ i = 3;
+ }
+ // NB: if using fixed point, 0.000001 will be truncated to zero,
+ // so these two comparisons must be <=, not <
+ if (splashAbs(vy[i] - vy[(i-1) & 3]) <= 0.000001 &&
+ vy[(i-1) & 3] < vy[(i+1) & 3]) {
+ i = (i-1) & 3;
+ }
+ if (splashAbs(vy[i] - vy[(i+1) & 3]) <= 0.000001) {
+ section[0].y0 = imgCoordMungeLower(vy[i]);
+ section[0].y1 = imgCoordMungeUpper(vy[(i+2) & 3]) - 1;
+ if (vx[i] < vx[(i+1) & 3]) {
+ section[0].ia0 = i;
+ section[0].ia1 = (i+3) & 3;
+ section[0].ib0 = (i+1) & 3;
+ section[0].ib1 = (i+2) & 3;
+ } else {
+ section[0].ia0 = (i+1) & 3;
+ section[0].ia1 = (i+2) & 3;
+ section[0].ib0 = i;
+ section[0].ib1 = (i+3) & 3;
+ }
+ nSections = 1;
+ } else {
+ section[0].y0 = imgCoordMungeLower(vy[i]);
+ section[2].y1 = imgCoordMungeUpper(vy[(i+2) & 3]) - 1;
+ section[0].ia0 = section[0].ib0 = i;
+ section[2].ia1 = section[2].ib1 = (i+2) & 3;
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[0].ia1 = section[2].ia0 = (i+1) & 3;
+ section[0].ib1 = section[2].ib0 = (i+3) & 3;
+ } else {
+ section[0].ia1 = section[2].ia0 = (i+3) & 3;
+ section[0].ib1 = section[2].ib0 = (i+1) & 3;
+ }
+ if (vy[(i+1) & 3] < vy[(i+3) & 3]) {
+ section[1].y0 = imgCoordMungeLower(vy[(i+1) & 3]);
+ section[2].y0 = imgCoordMungeUpper(vy[(i+3) & 3]);
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[1].ia0 = (i+1) & 3;
+ section[1].ia1 = (i+2) & 3;
+ section[1].ib0 = i;
+ section[1].ib1 = (i+3) & 3;
+ } else {
+ section[1].ia0 = i;
+ section[1].ia1 = (i+3) & 3;
+ section[1].ib0 = (i+1) & 3;
+ section[1].ib1 = (i+2) & 3;
+ }
+ } else {
+ section[1].y0 = imgCoordMungeLower(vy[(i+3) & 3]);
+ section[2].y0 = imgCoordMungeUpper(vy[(i+1) & 3]);
+ if (vx[(i+1) & 3] < vx[(i+3) & 3]) {
+ section[1].ia0 = i;
+ section[1].ia1 = (i+1) & 3;
+ section[1].ib0 = (i+3) & 3;
+ section[1].ib1 = (i+2) & 3;
+ } else {
+ section[1].ia0 = (i+3) & 3;
+ section[1].ia1 = (i+2) & 3;
+ section[1].ib0 = i;
+ section[1].ib1 = (i+1) & 3;
+ }
+ }
+ section[0].y1 = section[1].y0 - 1;
+ section[1].y1 = section[2].y0 - 1;
+ nSections = 3;
+ }
+ for (i = 0; i < nSections; ++i) {
+ section[i].xa0 = vx[section[i].ia0];
+ section[i].ya0 = vy[section[i].ia0];
+ section[i].xa1 = vx[section[i].ia1];
+ section[i].ya1 = vy[section[i].ia1];
+ section[i].xb0 = vx[section[i].ib0];
+ section[i].yb0 = vy[section[i].ib0];
+ section[i].xb1 = vx[section[i].ib1];
+ section[i].yb1 = vy[section[i].ib1];
+ section[i].dxdya = (section[i].xa1 - section[i].xa0) /
+ (section[i].ya1 - section[i].ya0);
+ section[i].dxdyb = (section[i].xb1 - section[i].xb0) /
+ (section[i].yb1 - section[i].yb0);
+ }
+
+ // initialize the pixel pipe
+ pipeInit(&pipe, 0, 0, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255),
+ srcAlpha || (vectorAntialias && clipRes != splashClipAllInside),
+ gFalse);
+ if (vectorAntialias) {
+ drawAAPixelInit();
+ }
+
+ // make sure narrow images cover at least one pixel
+ if (nSections == 1) {
+ if (section[0].y0 == section[0].y1) {
+ ++section[0].y1;
+ clipRes = opClipRes = splashClipPartial;
+ }
+ } else {
+ if (section[0].y0 == section[2].y1) {
+ ++section[1].y1;
+ clipRes = opClipRes = splashClipPartial;
+ }
+ }
+
+ // scan all pixels inside the target region
+ for (i = 0; i < nSections; ++i) {
+ for (y = section[i].y0; y <= section[i].y1; ++y) {
+ xa = imgCoordMungeLower(section[i].xa0 +
+ ((SplashCoord)y + 0.5 - section[i].ya0) *
+ section[i].dxdya);
+ if (unlikely(xa < 0))
+ xa = 0;
+ xb = imgCoordMungeUpper(section[i].xb0 +
+ ((SplashCoord)y + 0.5 - section[i].yb0) *
+ section[i].dxdyb);
+ // make sure narrow images cover at least one pixel
+ if (xa == xb) {
+ ++xb;
+ }
+ if (clipRes != splashClipAllInside) {
+ clipRes2 = state->clip->testSpan(xa, xb - 1, y);
+ } else {
+ clipRes2 = clipRes;
+ }
+ for (x = xa; x < xb; ++x) {
+ // map (x+0.5, y+0.5) back to the scaled image
+ xx = splashFloor(((SplashCoord)x + 0.5 - mat[4]) * ir00 +
+ ((SplashCoord)y + 0.5 - mat[5]) * ir10);
+ yy = splashFloor(((SplashCoord)x + 0.5 - mat[4]) * ir01 +
+ ((SplashCoord)y + 0.5 - mat[5]) * ir11);
+ // xx should always be within bounds, but floating point
+ // inaccuracy can cause problems
+ if (xx < 0) {
+ xx = 0;
+ } else if (xx >= scaledWidth) {
+ xx = scaledWidth - 1;
+ }
+ if (yy < 0) {
+ yy = 0;
+ } else if (yy >= scaledHeight) {
+ yy = scaledHeight - 1;
+ }
+ scaledImg->getPixel(xx, yy, pixel);
+ if (srcAlpha) {
+ pipe.shape = scaledImg->alpha[yy * scaledWidth + xx];
+ } else {
+ pipe.shape = 255;
+ }
+ if (vectorAntialias && clipRes2 != splashClipAllInside) {
+ drawAAPixel(&pipe, x, y);
+ } else {
+ drawPixel(&pipe, x, y, clipRes2 == splashClipAllInside);
+ }
+ }
+ }
+ }
+
+ delete scaledImg;
+ return splashOk;
+}
+
+// determine if a scaled image requires interpolation based on the scale and
+// the interpolate flag from the image dictionary
+static GBool isImageInterpolationRequired(int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ GBool interpolate) {
+ if (interpolate)
+ return gTrue;
+
+ /* When scale factor is >= 400% we don't interpolate. See bugs #25268, #9860 */
+ if (scaledWidth / srcWidth >= 4 || scaledHeight / srcHeight >= 4)
+ return gFalse;
+
+ return gTrue;
+}
+
+// Scale an image into a SplashBitmap.
+SplashBitmap *Splash::scaleImage(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight, GBool interpolate, GBool tilingPattern) {
+ SplashBitmap *dest;
+
+ dest = new SplashBitmap(scaledWidth, scaledHeight, 1, srcMode, srcAlpha, gTrue, bitmap->getSeparationList());
+ if (dest->getDataPtr() != NULL) {
+ if (scaledHeight < srcHeight) {
+ if (scaledWidth < srcWidth) {
+ scaleImageYdXd(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, dest);
+ } else {
+ scaleImageYdXu(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, dest);
+ }
+ } else {
+ if (scaledWidth < srcWidth) {
+ scaleImageYuXd(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, dest);
+ } else {
+ if (!tilingPattern && isImageInterpolationRequired(srcWidth, srcHeight, scaledWidth, scaledHeight, interpolate)) {
+ scaleImageYuXuBilinear(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, dest);
+ } else {
+ scaleImageYuXu(src, srcData, srcMode, nComps, srcAlpha,
+ srcWidth, srcHeight, scaledWidth, scaledHeight, dest);
+ }
+ }
+ }
+ } else {
+ delete dest;
+ dest = NULL;
+ }
+ return dest;
+}
+
+void Splash::scaleImageYdXd(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf, *alphaLineBuf;
+ Guint *pixBuf, *alphaPixBuf;
+ Guint pix0, pix1, pix2;
+#if SPLASH_CMYK
+ Guint pix3;
+ Guint pix[SPOT_NCOMPS+4], cp;
+#endif
+ Guint alpha;
+ Guchar *destPtr, *destAlphaPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, xxa, d, d0, d1;
+ int i, j;
+
+ // Bresenham parameters for y scale
+ yp = srcHeight / scaledHeight;
+ yq = srcHeight % scaledHeight;
+
+ // Bresenham parameters for x scale
+ xp = srcWidth / scaledWidth;
+ xq = srcWidth % scaledWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmallocn(srcWidth, nComps);
+ pixBuf = (Guint *)gmallocn(srcWidth, nComps * sizeof(int));
+ if (srcAlpha) {
+ alphaLineBuf = (Guchar *)gmalloc(srcWidth);
+ alphaPixBuf = (Guint *)gmallocn(srcWidth, sizeof(int));
+ } else {
+ alphaLineBuf = NULL;
+ alphaPixBuf = NULL;
+ }
+
+ // init y scale Bresenham
+ yt = 0;
+
+ destPtr = dest->data;
+ destAlphaPtr = dest->alpha;
+ for (y = 0; y < scaledHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= scaledHeight) {
+ yt -= scaledHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read rows from image
+ memset(pixBuf, 0, srcWidth * nComps * sizeof(int));
+ if (srcAlpha) {
+ memset(alphaPixBuf, 0, srcWidth * sizeof(int));
+ }
+ for (i = 0; i < yStep; ++i) {
+ (*src)(srcData, lineBuf, alphaLineBuf);
+ for (j = 0; j < srcWidth * nComps; ++j) {
+ pixBuf[j] += lineBuf[j];
+ }
+ if (srcAlpha) {
+ for (j = 0; j < srcWidth; ++j) {
+ alphaPixBuf[j] += alphaLineBuf[j];
+ }
+ }
+ }
+
+ // init x scale Bresenham
+ xt = 0;
+ d0 = (1 << 23) / (yStep * xp);
+ d1 = (1 << 23) / (yStep * (xp + 1));
+
+ xx = xxa = 0;
+ for (x = 0; x < scaledWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= scaledWidth) {
+ xt -= scaledWidth;
+ xStep = xp + 1;
+ d = d1;
+ } else {
+ xStep = xp;
+ d = d0;
+ }
+
+ switch (srcMode) {
+
+ case splashModeMono8:
+
+ // compute the final pixel
+ pix0 = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix0 += pixBuf[xx++];
+ }
+ // pix / xStep * yStep
+ pix0 = (pix0 * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix0;
+ break;
+
+ case splashModeRGB8:
+
+ // compute the final pixel
+ pix0 = pix1 = pix2 = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix0 += pixBuf[xx];
+ pix1 += pixBuf[xx+1];
+ pix2 += pixBuf[xx+2];
+ xx += 3;
+ }
+ // pix / xStep * yStep
+ pix0 = (pix0 * d) >> 23;
+ pix1 = (pix1 * d) >> 23;
+ pix2 = (pix2 * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix0;
+ *destPtr++ = (Guchar)pix1;
+ *destPtr++ = (Guchar)pix2;
+ break;
+
+ case splashModeXBGR8:
+
+ // compute the final pixel
+ pix0 = pix1 = pix2 = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix0 += pixBuf[xx];
+ pix1 += pixBuf[xx+1];
+ pix2 += pixBuf[xx+2];
+ xx += 4;
+ }
+ // pix / xStep * yStep
+ pix0 = (pix0 * d) >> 23;
+ pix1 = (pix1 * d) >> 23;
+ pix2 = (pix2 * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix2;
+ *destPtr++ = (Guchar)pix1;
+ *destPtr++ = (Guchar)pix0;
+ *destPtr++ = (Guchar)255;
+ break;
+
+ case splashModeBGR8:
+
+ // compute the final pixel
+ pix0 = pix1 = pix2 = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix0 += pixBuf[xx];
+ pix1 += pixBuf[xx+1];
+ pix2 += pixBuf[xx+2];
+ xx += 3;
+ }
+ // pix / xStep * yStep
+ pix0 = (pix0 * d) >> 23;
+ pix1 = (pix1 * d) >> 23;
+ pix2 = (pix2 * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix2;
+ *destPtr++ = (Guchar)pix1;
+ *destPtr++ = (Guchar)pix0;
+ break;
+
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+
+ // compute the final pixel
+ pix0 = pix1 = pix2 = pix3 = 0;
+ for (i = 0; i < xStep; ++i) {
+ pix0 += pixBuf[xx];
+ pix1 += pixBuf[xx+1];
+ pix2 += pixBuf[xx+2];
+ pix3 += pixBuf[xx+3];
+ xx += 4;
+ }
+ // pix / xStep * yStep
+ pix0 = (pix0 * d) >> 23;
+ pix1 = (pix1 * d) >> 23;
+ pix2 = (pix2 * d) >> 23;
+ pix3 = (pix3 * d) >> 23;
+
+ // store the pixel
+ *destPtr++ = (Guchar)pix0;
+ *destPtr++ = (Guchar)pix1;
+ *destPtr++ = (Guchar)pix2;
+ *destPtr++ = (Guchar)pix3;
+ break;
+ case splashModeDeviceN8:
+
+ // compute the final pixel
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ pix[cp] = 0;
+ for (i = 0; i < xStep; ++i) {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++) {
+ pix[cp] += pixBuf[xx + cp];
+ }
+ xx += (SPOT_NCOMPS+4);
+ }
+ // pix / xStep * yStep
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ pix[cp] = (pix[cp] * d) >> 23;
+
+ // store the pixel
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *destPtr++ = (Guchar)pix[cp];
+ break;
+#endif
+
+
+ case splashModeMono1: // mono1 is not allowed
+ default:
+ break;
+ }
+
+ // process alpha
+ if (srcAlpha) {
+ alpha = 0;
+ for (i = 0; i < xStep; ++i, ++xxa) {
+ alpha += alphaPixBuf[xxa];
+ }
+ // alpha / xStep * yStep
+ alpha = (alpha * d) >> 23;
+ *destAlphaPtr++ = (Guchar)alpha;
+ }
+ }
+ }
+
+ gfree(alphaPixBuf);
+ gfree(alphaLineBuf);
+ gfree(pixBuf);
+ gfree(lineBuf);
+}
+
+void Splash::scaleImageYdXu(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf, *alphaLineBuf;
+ Guint *pixBuf, *alphaPixBuf;
+ Guint pix[splashMaxColorComps];
+ Guint alpha;
+ Guchar *destPtr, *destAlphaPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, d;
+ int i, j;
+
+ // Bresenham parameters for y scale
+ yp = srcHeight / scaledHeight;
+ yq = srcHeight % scaledHeight;
+
+ // Bresenham parameters for x scale
+ xp = scaledWidth / srcWidth;
+ xq = scaledWidth % srcWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmallocn(srcWidth, nComps);
+ pixBuf = (Guint *)gmallocn(srcWidth, nComps * sizeof(int));
+ if (srcAlpha) {
+ alphaLineBuf = (Guchar *)gmalloc(srcWidth);
+ alphaPixBuf = (Guint *)gmallocn(srcWidth, sizeof(int));
+ } else {
+ alphaLineBuf = NULL;
+ alphaPixBuf = NULL;
+ }
+
+ // init y scale Bresenham
+ yt = 0;
+
+ destPtr = dest->data;
+ destAlphaPtr = dest->alpha;
+ for (y = 0; y < scaledHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= scaledHeight) {
+ yt -= scaledHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read rows from image
+ memset(pixBuf, 0, srcWidth * nComps * sizeof(int));
+ if (srcAlpha) {
+ memset(alphaPixBuf, 0, srcWidth * sizeof(int));
+ }
+ for (i = 0; i < yStep; ++i) {
+ (*src)(srcData, lineBuf, alphaLineBuf);
+ for (j = 0; j < srcWidth * nComps; ++j) {
+ pixBuf[j] += lineBuf[j];
+ }
+ if (srcAlpha) {
+ for (j = 0; j < srcWidth; ++j) {
+ alphaPixBuf[j] += alphaLineBuf[j];
+ }
+ }
+ }
+
+ // init x scale Bresenham
+ xt = 0;
+ d = (1 << 23) / yStep;
+
+ for (x = 0; x < srcWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= srcWidth) {
+ xt -= srcWidth;
+ xStep = xp + 1;
+ } else {
+ xStep = xp;
+ }
+
+ // compute the final pixel
+ for (i = 0; i < nComps; ++i) {
+ // pixBuf[] / yStep
+ pix[i] = (pixBuf[x * nComps + i] * d) >> 23;
+ }
+
+ // store the pixel
+ switch (srcMode) {
+ case splashModeMono1: // mono1 is not allowed
+ break;
+ case splashModeMono8:
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix[0];
+ }
+ break;
+ case splashModeRGB8:
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ }
+ break;
+ case splashModeXBGR8:
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)255;
+ }
+ break;
+ case splashModeBGR8:
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ for (i = 0; i < xStep; ++i) {
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[3];
+ }
+ break;
+ case splashModeDeviceN8:
+ for (i = 0; i < xStep; ++i) {
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *destPtr++ = (Guchar)pix[cp];
+ }
+ break;
+#endif
+ }
+
+ // process alpha
+ if (srcAlpha) {
+ // alphaPixBuf[] / yStep
+ alpha = (alphaPixBuf[x] * d) >> 23;
+ for (i = 0; i < xStep; ++i) {
+ *destAlphaPtr++ = (Guchar)alpha;
+ }
+ }
+ }
+ }
+
+ gfree(alphaPixBuf);
+ gfree(alphaLineBuf);
+ gfree(pixBuf);
+ gfree(lineBuf);
+}
+
+void Splash::scaleImageYuXd(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf, *alphaLineBuf;
+ Guint pix[splashMaxColorComps];
+ Guint alpha;
+ Guchar *destPtr0, *destPtr, *destAlphaPtr0, *destAlphaPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx, xxa, d, d0, d1;
+ int i, j;
+
+ // Bresenham parameters for y scale
+ yp = scaledHeight / srcHeight;
+ yq = scaledHeight % srcHeight;
+
+ // Bresenham parameters for x scale
+ xp = srcWidth / scaledWidth;
+ xq = srcWidth % scaledWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmallocn_checkoverflow(srcWidth, nComps);
+ if (unlikely(!lineBuf))
+ return;
+ if (srcAlpha) {
+ alphaLineBuf = (Guchar *)gmalloc(srcWidth);
+ } else {
+ alphaLineBuf = NULL;
+ }
+
+ // init y scale Bresenham
+ yt = 0;
+
+ destPtr0 = dest->data;
+ destAlphaPtr0 = dest->alpha;
+ for (y = 0; y < srcHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= srcHeight) {
+ yt -= srcHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read row from image
+ (*src)(srcData, lineBuf, alphaLineBuf);
+
+ // init x scale Bresenham
+ xt = 0;
+ d0 = (1 << 23) / xp;
+ d1 = (1 << 23) / (xp + 1);
+
+ xx = xxa = 0;
+ for (x = 0; x < scaledWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= scaledWidth) {
+ xt -= scaledWidth;
+ xStep = xp + 1;
+ d = d1;
+ } else {
+ xStep = xp;
+ d = d0;
+ }
+
+ // compute the final pixel
+ for (i = 0; i < nComps; ++i) {
+ pix[i] = 0;
+ }
+ for (i = 0; i < xStep; ++i) {
+ for (j = 0; j < nComps; ++j, ++xx) {
+ pix[j] += lineBuf[xx];
+ }
+ }
+ for (i = 0; i < nComps; ++i) {
+ // pix[] / xStep
+ pix[i] = (pix[i] * d) >> 23;
+ }
+
+ // store the pixel
+ switch (srcMode) {
+ case splashModeMono1: // mono1 is not allowed
+ break;
+ case splashModeMono8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ }
+ break;
+ case splashModeRGB8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ }
+ break;
+ case splashModeXBGR8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)255;
+ }
+ break;
+ case splashModeBGR8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[3];
+ }
+ break;
+ case splashModeDeviceN8:
+ for (i = 0; i < yStep; ++i) {
+ destPtr = destPtr0 + (i * scaledWidth + x) * nComps;
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *destPtr++ = (Guchar)pix[cp];
+ }
+ break;
+#endif
+ }
+
+ // process alpha
+ if (srcAlpha) {
+ alpha = 0;
+ for (i = 0; i < xStep; ++i, ++xxa) {
+ alpha += alphaLineBuf[xxa];
+ }
+ // alpha / xStep
+ alpha = (alpha * d) >> 23;
+ for (i = 0; i < yStep; ++i) {
+ destAlphaPtr = destAlphaPtr0 + i * scaledWidth + x;
+ *destAlphaPtr = (Guchar)alpha;
+ }
+ }
+ }
+
+ destPtr0 += yStep * scaledWidth * nComps;
+ if (srcAlpha) {
+ destAlphaPtr0 += yStep * scaledWidth;
+ }
+ }
+
+ gfree(alphaLineBuf);
+ gfree(lineBuf);
+}
+
+void Splash::scaleImageYuXu(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *lineBuf, *alphaLineBuf;
+ Guint pix[splashMaxColorComps];
+ Guint alpha;
+ Guchar *destPtr0, *destPtr, *destAlphaPtr0, *destAlphaPtr;
+ int yp, yq, xp, xq, yt, y, yStep, xt, x, xStep, xx;
+ int i, j;
+
+ // Bresenham parameters for y scale
+ yp = scaledHeight / srcHeight;
+ yq = scaledHeight % srcHeight;
+
+ // Bresenham parameters for x scale
+ xp = scaledWidth / srcWidth;
+ xq = scaledWidth % srcWidth;
+
+ // allocate buffers
+ lineBuf = (Guchar *)gmallocn(srcWidth, nComps);
+ if (srcAlpha) {
+ alphaLineBuf = (Guchar *)gmalloc(srcWidth);
+ } else {
+ alphaLineBuf = NULL;
+ }
+
+ // init y scale Bresenham
+ yt = 0;
+
+ destPtr0 = dest->data;
+ destAlphaPtr0 = dest->alpha;
+ for (y = 0; y < srcHeight; ++y) {
+
+ // y scale Bresenham
+ if ((yt += yq) >= srcHeight) {
+ yt -= srcHeight;
+ yStep = yp + 1;
+ } else {
+ yStep = yp;
+ }
+
+ // read row from image
+ (*src)(srcData, lineBuf, alphaLineBuf);
+
+ // init x scale Bresenham
+ xt = 0;
+
+ xx = 0;
+ for (x = 0; x < srcWidth; ++x) {
+
+ // x scale Bresenham
+ if ((xt += xq) >= srcWidth) {
+ xt -= srcWidth;
+ xStep = xp + 1;
+ } else {
+ xStep = xp;
+ }
+
+ // compute the final pixel
+ for (i = 0; i < nComps; ++i) {
+ pix[i] = lineBuf[x * nComps + i];
+ }
+
+ // store the pixel
+ switch (srcMode) {
+ case splashModeMono1: // mono1 is not allowed
+ break;
+ case splashModeMono8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ }
+ }
+ break;
+ case splashModeRGB8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ }
+ }
+ break;
+ case splashModeXBGR8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)255;
+ }
+ }
+ break;
+ case splashModeBGR8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ }
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[3];
+ }
+ }
+ break;
+ case splashModeDeviceN8:
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destPtr = destPtr0 + (i * scaledWidth + xx + j) * nComps;
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *destPtr++ = (Guchar)pix[cp];
+ }
+ }
+ break;
+#endif
+ }
+
+ // process alpha
+ if (srcAlpha) {
+ alpha = alphaLineBuf[x];
+ for (i = 0; i < yStep; ++i) {
+ for (j = 0; j < xStep; ++j) {
+ destAlphaPtr = destAlphaPtr0 + i * scaledWidth + xx + j;
+ *destAlphaPtr = (Guchar)alpha;
+ }
+ }
+ }
+
+ xx += xStep;
+ }
+
+ destPtr0 += yStep * scaledWidth * nComps;
+ if (srcAlpha) {
+ destAlphaPtr0 += yStep * scaledWidth;
+ }
+ }
+
+ gfree(alphaLineBuf);
+ gfree(lineBuf);
+}
+
+// expand source row to scaledWidth using linear interpolation
+static void expandRow(Guchar *srcBuf, Guchar *dstBuf, int srcWidth, int scaledWidth, int nComps)
+{
+ double xStep = (double)srcWidth/scaledWidth;
+ double xSrc = 0.0;
+ double xFrac, xInt;
+ int p;
+
+ // pad the source with an extra pixel equal to the last pixel
+ // so that when xStep is inside the last pixel we still have two
+ // pixels to interpolate between.
+ for (int i = 0; i < nComps; i++)
+ srcBuf[srcWidth*nComps + i] = srcBuf[(srcWidth-1)*nComps + i];
+
+ for (int x = 0; x < scaledWidth; x++) {
+ xFrac = modf(xSrc, &xInt);
+ p = (int)xInt;
+ for (int c = 0; c < nComps; c++) {
+ dstBuf[nComps*x + c] = srcBuf[nComps*p + c]*(1.0 - xFrac) + srcBuf[nComps*(p+1) + c]*xFrac;
+ }
+ xSrc += xStep;
+ }
+}
+
+// Scale up image using bilinear interpolation
+void Splash::scaleImageYuXuBilinear(SplashImageSource src, void *srcData,
+ SplashColorMode srcMode, int nComps,
+ GBool srcAlpha, int srcWidth, int srcHeight,
+ int scaledWidth, int scaledHeight,
+ SplashBitmap *dest) {
+ Guchar *srcBuf, *lineBuf1, *lineBuf2, *alphaSrcBuf, *alphaLineBuf1, *alphaLineBuf2;
+ Guint pix[splashMaxColorComps];
+ Guchar *destPtr0, *destPtr, *destAlphaPtr0, *destAlphaPtr;
+ int i;
+
+ if (srcWidth < 1 || srcHeight < 1)
+ return;
+
+ // allocate buffers
+ srcBuf = (Guchar *)gmallocn(srcWidth+1, nComps); // + 1 pixel of padding
+ lineBuf1 = (Guchar *)gmallocn(scaledWidth, nComps);
+ lineBuf2 = (Guchar *)gmallocn(scaledWidth, nComps);
+ if (srcAlpha) {
+ alphaSrcBuf = (Guchar *)gmalloc(srcWidth+1); // + 1 pixel of padding
+ alphaLineBuf1 = (Guchar *)gmalloc(scaledWidth);
+ alphaLineBuf2 = (Guchar *)gmalloc(scaledWidth);
+ } else {
+ alphaSrcBuf = NULL;
+ alphaLineBuf1 = NULL;
+ alphaLineBuf2 = NULL;
+ }
+
+ double ySrc = 0.0;
+ double yStep = (double)srcHeight/scaledHeight;
+ double yFrac, yInt;
+ int currentSrcRow = -1;
+ (*src)(srcData, srcBuf, alphaSrcBuf);
+ expandRow(srcBuf, lineBuf2, srcWidth, scaledWidth, nComps);
+ if (srcAlpha)
+ expandRow(alphaSrcBuf, alphaLineBuf2, srcWidth, scaledWidth, 1);
+
+ destPtr0 = dest->data;
+ destAlphaPtr0 = dest->alpha;
+ for (int y = 0; y < scaledHeight; y++) {
+ yFrac = modf(ySrc, &yInt);
+ if ((int)yInt > currentSrcRow) {
+ currentSrcRow++;
+ // Copy line2 data to line1 and get next line2 data.
+ // If line2 already contains the last source row we don't touch it.
+ // This effectively adds an extra row of padding for interpolating the
+ // last source row with.
+ memcpy(lineBuf1, lineBuf2, scaledWidth * nComps);
+ if (srcAlpha)
+ memcpy(alphaLineBuf1, alphaLineBuf2, scaledWidth);
+ if (currentSrcRow < srcHeight) {
+ (*src)(srcData, srcBuf, alphaSrcBuf);
+ expandRow(srcBuf, lineBuf2, srcWidth, scaledWidth, nComps);
+ if (srcAlpha)
+ expandRow(alphaSrcBuf, alphaLineBuf2, srcWidth, scaledWidth, 1);
+ }
+ }
+
+ // write row y using linear interpolation on lineBuf1 and lineBuf2
+ for (int x = 0; x < scaledWidth; ++x) {
+ // compute the final pixel
+ for (i = 0; i < nComps; ++i) {
+ pix[i] = lineBuf1[x*nComps + i]*(1.0 - yFrac) + lineBuf2[x*nComps + i]*yFrac;
+ }
+
+ // store the pixel
+ destPtr = destPtr0 + (y * scaledWidth + x) * nComps;
+ switch (srcMode) {
+ case splashModeMono1: // mono1 is not allowed
+ break;
+ case splashModeMono8:
+ *destPtr++ = (Guchar)pix[0];
+ break;
+ case splashModeRGB8:
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ break;
+ case splashModeXBGR8:
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)255;
+ break;
+ case splashModeBGR8:
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[0];
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ *destPtr++ = (Guchar)pix[0];
+ *destPtr++ = (Guchar)pix[1];
+ *destPtr++ = (Guchar)pix[2];
+ *destPtr++ = (Guchar)pix[3];
+ break;
+ case splashModeDeviceN8:
+ for (int cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ *destPtr++ = (Guchar)pix[cp];
+ break;
+#endif
+ }
+
+ // process alpha
+ if (srcAlpha) {
+ destAlphaPtr = destAlphaPtr0 + y*scaledWidth + x;
+ *destAlphaPtr = alphaLineBuf1[x]*(1.0 - yFrac) + alphaLineBuf2[x]*yFrac;
+ }
+ }
+
+ ySrc += yStep;
+ }
+
+ gfree(alphaSrcBuf);
+ gfree(alphaLineBuf1);
+ gfree(alphaLineBuf2);
+ gfree(srcBuf);
+ gfree(lineBuf1);
+ gfree(lineBuf2);
+}
+
+void Splash::vertFlipImage(SplashBitmap *img, int width, int height,
+ int nComps) {
+ Guchar *lineBuf;
+ Guchar *p0, *p1;
+ int w;
+
+ if (unlikely(img->data == NULL)) {
+ error(errInternal, -1, "img->data is NULL in Splash::vertFlipImage");
+ return;
+ }
+
+ w = width * nComps;
+ lineBuf = (Guchar *)gmalloc(w);
+ for (p0 = img->data, p1 = img->data + (height - 1) * w;
+ p0 < p1;
+ p0 += w, p1 -= w) {
+ memcpy(lineBuf, p0, w);
+ memcpy(p0, p1, w);
+ memcpy(p1, lineBuf, w);
+ }
+ if (img->alpha) {
+ for (p0 = img->alpha, p1 = img->alpha + (height - 1) * width;
+ p0 < p1;
+ p0 += width, p1 -= width) {
+ memcpy(lineBuf, p0, width);
+ memcpy(p0, p1, width);
+ memcpy(p1, lineBuf, width);
+ }
+ }
+ gfree(lineBuf);
+}
+
+void Splash::blitImage(SplashBitmap *src, GBool srcAlpha, int xDest, int yDest) {
+ SplashClipResult clipRes = state->clip->testRect(xDest, yDest, xDest + src->getWidth() - 1, yDest + src->getHeight() - 1);
+ if (clipRes != splashClipAllOutside) {
+ blitImage(src, srcAlpha, xDest, yDest, clipRes);
+ }
+}
+
+void Splash::blitImage(SplashBitmap *src, GBool srcAlpha, int xDest, int yDest,
+ SplashClipResult clipRes) {
+ SplashPipe pipe;
+ SplashColor pixel;
+ Guchar *ap;
+ int w, h, x0, y0, x1, y1, x, y;
+
+ // split the image into clipped and unclipped regions
+ w = src->getWidth();
+ h = src->getHeight();
+ if (clipRes == splashClipAllInside) {
+ x0 = 0;
+ y0 = 0;
+ x1 = w;
+ y1 = h;
+ } else {
+ if (state->clip->getNumPaths()) {
+ x0 = x1 = w;
+ y0 = y1 = h;
+ } else {
+ if ((x0 = splashCeil(state->clip->getXMin()) - xDest) < 0) {
+ x0 = 0;
+ }
+ if ((y0 = splashCeil(state->clip->getYMin()) - yDest) < 0) {
+ y0 = 0;
+ }
+ if ((x1 = splashFloor(state->clip->getXMax()) - xDest) > w) {
+ x1 = w;
+ }
+ if (x1 < x0) {
+ x1 = x0;
+ }
+ if ((y1 = splashFloor(state->clip->getYMax()) - yDest) > h) {
+ y1 = h;
+ }
+ if (y1 < y0) {
+ y1 = y0;
+ }
+ }
+ }
+
+ // draw the unclipped region
+ if (x0 < w && y0 < h && x0 < x1 && y0 < y1) {
+ pipeInit(&pipe, xDest + x0, yDest + y0, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255), srcAlpha, gFalse);
+ if (srcAlpha) {
+ for (y = y0; y < y1; ++y) {
+ pipeSetXY(&pipe, xDest + x0, yDest + y);
+ ap = src->getAlphaPtr() + y * w + x0;
+ for (x = x0; x < x1; ++x) {
+ src->getPixel(x, y, pixel);
+ pipe.shape = *ap++;
+ (this->*pipe.run)(&pipe);
+ }
+ }
+ } else {
+ for (y = y0; y < y1; ++y) {
+ pipeSetXY(&pipe, xDest + x0, yDest + y);
+ for (x = x0; x < x1; ++x) {
+ src->getPixel(x, y, pixel);
+ (this->*pipe.run)(&pipe);
+ }
+ }
+ }
+ updateModX(xDest + x0);
+ updateModX(xDest + x1 - 1);
+ updateModY(yDest + y0);
+ updateModY(yDest + y1 - 1);
+ }
+
+ // draw the clipped regions
+ if (y0 > 0) {
+ blitImageClipped(src, srcAlpha, 0, 0, xDest, yDest, w, y0);
+ }
+ if (y1 < h) {
+ blitImageClipped(src, srcAlpha, 0, y1, xDest, yDest + y1, w, h - y1);
+ }
+ if (x0 > 0 && y0 < y1) {
+ blitImageClipped(src, srcAlpha, 0, y0, xDest, yDest + y0, x0, y1 - y0);
+ }
+ if (x1 < w && y0 < y1) {
+ blitImageClipped(src, srcAlpha, x1, y0, xDest + x1, yDest + y0,
+ w - x1, y1 - y0);
+ }
+}
+
+void Splash::blitImageClipped(SplashBitmap *src, GBool srcAlpha,
+ int xSrc, int ySrc, int xDest, int yDest,
+ int w, int h) {
+ SplashPipe pipe;
+ SplashColor pixel;
+ Guchar *ap;
+ int x, y;
+
+ if (vectorAntialias) {
+ pipeInit(&pipe, xDest, yDest, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255), gTrue, gFalse);
+ drawAAPixelInit();
+ if (srcAlpha) {
+ for (y = 0; y < h; ++y) {
+ ap = src->getAlphaPtr() + (ySrc + y) * src->getWidth() + xSrc;
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ pipe.shape = *ap++;
+ drawAAPixel(&pipe, xDest + x, yDest + y);
+ }
+ }
+ } else {
+ for (y = 0; y < h; ++y) {
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ pipe.shape = 255;
+ drawAAPixel(&pipe, xDest + x, yDest + y);
+ }
+ }
+ }
+ } else {
+ pipeInit(&pipe, xDest, yDest, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255), srcAlpha, gFalse);
+ if (srcAlpha) {
+ for (y = 0; y < h; ++y) {
+ ap = src->getAlphaPtr() + (ySrc + y) * src->getWidth() + xSrc;
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ if (state->clip->test(xDest + x, yDest + y)) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ pipe.shape = *ap++;
+ (this->*pipe.run)(&pipe);
+ updateModX(xDest + x);
+ updateModY(yDest + y);
+ } else {
+ pipeIncX(&pipe);
+ ++ap;
+ }
+ }
+ }
+ } else {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ if (state->clip->test(xDest + x, yDest + y)) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ (this->*pipe.run)(&pipe);
+ updateModX(xDest + x);
+ updateModY(yDest + y);
+ } else {
+ pipeIncX(&pipe);
+ }
+ }
+ }
+ }
+ }
+}
+
+SplashError Splash::composite(SplashBitmap *src, int xSrc, int ySrc,
+ int xDest, int yDest, int w, int h,
+ GBool noClip, GBool nonIsolated,
+ GBool knockout, SplashCoord knockoutOpacity) {
+ SplashPipe pipe;
+ SplashColor pixel;
+ Guchar alpha;
+ Guchar *ap;
+ int x, y;
+
+ if (src->mode != bitmap->mode) {
+ return splashErrModeMismatch;
+ }
+
+ if (unlikely(!bitmap->data)) {
+ return splashErrZeroImage;
+ }
+
+ if(src->getSeparationList()->getLength() > bitmap->getSeparationList()->getLength()) {
+ for (x = bitmap->getSeparationList()->getLength(); x < src->getSeparationList()->getLength(); x++)
+ bitmap->getSeparationList()->append(((GfxSeparationColorSpace *)src->getSeparationList()->get(x))->copy());
+ }
+ if (src->alpha) {
+ pipeInit(&pipe, xDest, yDest, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255), gTrue, nonIsolated,
+ knockout, (Guchar)splashRound(knockoutOpacity * 255));
+ if (noClip) {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ ap = src->getAlphaPtr() + (ySrc + y) * src->getWidth() + xSrc;
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ alpha = *ap++;
+ // this uses shape instead of alpha, which isn't technically
+ // correct, but works out the same
+ pipe.shape = alpha;
+ (this->*pipe.run)(&pipe);
+ }
+ }
+ updateModX(xDest);
+ updateModX(xDest + w - 1);
+ updateModY(yDest);
+ updateModY(yDest + h - 1);
+ } else {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ ap = src->getAlphaPtr() + (ySrc + y) * src->getWidth() + xSrc;
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ alpha = *ap++;
+ if (state->clip->test(xDest + x, yDest + y)) {
+ // this uses shape instead of alpha, which isn't technically
+ // correct, but works out the same
+ pipe.shape = alpha;
+ (this->*pipe.run)(&pipe);
+ updateModX(xDest + x);
+ updateModY(yDest + y);
+ } else {
+ pipeIncX(&pipe);
+ }
+ }
+ }
+ }
+ } else {
+ pipeInit(&pipe, xDest, yDest, NULL, pixel,
+ (Guchar)splashRound(state->fillAlpha * 255), gFalse, nonIsolated);
+ if (noClip) {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ (this->*pipe.run)(&pipe);
+ }
+ }
+ updateModX(xDest);
+ updateModX(xDest + w - 1);
+ updateModY(yDest);
+ updateModY(yDest + h - 1);
+ } else {
+ for (y = 0; y < h; ++y) {
+ pipeSetXY(&pipe, xDest, yDest + y);
+ for (x = 0; x < w; ++x) {
+ src->getPixel(xSrc + x, ySrc + y, pixel);
+ if (state->clip->test(xDest + x, yDest + y)) {
+ (this->*pipe.run)(&pipe);
+ updateModX(xDest + x);
+ updateModY(yDest + y);
+ } else {
+ pipeIncX(&pipe);
+ }
+ }
+ }
+ }
+ }
+
+ return splashOk;
+}
+
+void Splash::compositeBackground(SplashColorPtr color) {
+ SplashColorPtr p;
+ Guchar *q;
+ Guchar alpha, alpha1, c, color0, color1, color2;
+#if SPLASH_CMYK
+ Guchar color3;
+ Guchar colorsp[SPOT_NCOMPS+4], cp;
+#endif
+ int x, y, mask;
+
+ if (unlikely(bitmap->alpha == NULL)) {
+ error(errInternal, -1, "bitmap->alpha is NULL in Splash::compositeBackground");
+ return;
+ }
+
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ color0 = color[0];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ mask = 0x80;
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ alpha1 = 255 - alpha;
+ c = (*p & mask) ? 0xff : 0x00;
+ c = div255(alpha1 * color0 + alpha * c);
+ if (c & 0x80) {
+ *p |= mask;
+ } else {
+ *p &= ~mask;
+ }
+ if (!(mask >>= 1)) {
+ mask = 0x80;
+ ++p;
+ }
+ }
+ }
+ break;
+ case splashModeMono8:
+ color0 = color[0];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ alpha1 = 255 - alpha;
+ p[0] = div255(alpha1 * color0 + alpha * p[0]);
+ ++p;
+ }
+ }
+ break;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ color0 = color[0];
+ color1 = color[1];
+ color2 = color[2];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ if (alpha == 0)
+ {
+ p[0] = color0;
+ p[1] = color1;
+ p[2] = color2;
+ }
+ else if (alpha != 255)
+ {
+ alpha1 = 255 - alpha;
+ p[0] = div255(alpha1 * color0 + alpha * p[0]);
+ p[1] = div255(alpha1 * color1 + alpha * p[1]);
+ p[2] = div255(alpha1 * color2 + alpha * p[2]);
+ }
+ p += 3;
+ }
+ }
+ break;
+ case splashModeXBGR8:
+ color0 = color[0];
+ color1 = color[1];
+ color2 = color[2];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ if (alpha == 0)
+ {
+ p[0] = color0;
+ p[1] = color1;
+ p[2] = color2;
+ }
+ else if (alpha != 255)
+ {
+ alpha1 = 255 - alpha;
+ p[0] = div255(alpha1 * color0 + alpha * p[0]);
+ p[1] = div255(alpha1 * color1 + alpha * p[1]);
+ p[2] = div255(alpha1 * color2 + alpha * p[2]);
+ }
+ p[3] = 255;
+ p += 4;
+ }
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ color0 = color[0];
+ color1 = color[1];
+ color2 = color[2];
+ color3 = color[3];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ if (alpha == 0)
+ {
+ p[0] = color0;
+ p[1] = color1;
+ p[2] = color2;
+ p[3] = color3;
+ }
+ else if (alpha != 255)
+ {
+ alpha1 = 255 - alpha;
+ p[0] = div255(alpha1 * color0 + alpha * p[0]);
+ p[1] = div255(alpha1 * color1 + alpha * p[1]);
+ p[2] = div255(alpha1 * color2 + alpha * p[2]);
+ p[3] = div255(alpha1 * color3 + alpha * p[3]);
+ }
+ p += 4;
+ }
+ }
+ break;
+ case splashModeDeviceN8:
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ colorsp[cp] = color[cp];
+ for (y = 0; y < bitmap->height; ++y) {
+ p = &bitmap->data[y * bitmap->rowSize];
+ q = &bitmap->alpha[y * bitmap->width];
+ for (x = 0; x < bitmap->width; ++x) {
+ alpha = *q++;
+ if (alpha == 0)
+ {
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ p[cp] = colorsp[cp];
+ }
+ else if (alpha != 255)
+ {
+ alpha1 = 255 - alpha;
+ for (cp = 0; cp < SPOT_NCOMPS+4; cp++)
+ p[cp] = div255(alpha1 * colorsp[cp] + alpha * p[cp]);
+ }
+ p += (SPOT_NCOMPS+4);
+ }
+ }
+ break;
+#endif
+ }
+ memset(bitmap->alpha, 255, bitmap->width * bitmap->height);
+}
+
+GBool Splash::gouraudTriangleShadedFill(SplashGouraudColor *shading)
+{
+ double xdbl[3] = {0., 0., 0.};
+ double ydbl[3] = {0., 0., 0.};
+ int x[3] = {0, 0, 0};
+ int y[3] = {0, 0, 0};
+ double xt=0., xa=0., yt=0.;
+ double ca=0., ct=0.;
+
+ // triangle interpolation:
+ //
+ double scanLimitMapL[2] = {0., 0.};
+ double scanLimitMapR[2] = {0., 0.};
+ double scanColorMapL[2] = {0., 0.};
+ double scanColorMapR[2] = {0., 0.};
+ double scanColorMap[2] = {0., 0.};
+ int scanEdgeL[2] = { 0, 0 };
+ int scanEdgeR[2] = { 0, 0 };
+ GBool hasFurtherSegment = gFalse;
+
+ int scanLineOff = 0;
+ int bitmapOff = 0;
+ int scanLimitR = 0, scanLimitL = 0;
+
+ int bitmapWidth = bitmap->getWidth();
+ SplashClip* clip = getClip();
+ SplashBitmap *blitTarget = bitmap;
+ SplashColorPtr bitmapData = bitmap->getDataPtr();
+ int bitmapOffLimit = bitmap->getHeight() * bitmap->getRowSize();
+ SplashColorPtr bitmapAlpha = bitmap->getAlphaPtr();
+ SplashColorPtr cur = NULL;
+ SplashCoord* userToCanvasMatrix = getMatrix();
+ SplashColorMode bitmapMode = bitmap->getMode();
+ GBool hasAlpha = (bitmapAlpha != NULL);
+ int rowSize = bitmap->getRowSize();
+ int colorComps = 0;
+ switch (bitmapMode) {
+ case splashModeMono1:
+ break;
+ case splashModeMono8:
+ colorComps=1;
+ break;
+ case splashModeRGB8:
+ colorComps=3;
+ break;
+ case splashModeBGR8:
+ colorComps=3;
+ break;
+ case splashModeXBGR8:
+ colorComps=4;
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ colorComps=4;
+ break;
+ case splashModeDeviceN8:
+ colorComps=SPOT_NCOMPS+4;
+ break;
+#endif
+ }
+
+ SplashPipe pipe;
+ SplashColor cSrcVal;
+
+ pipeInit(&pipe, 0, 0, NULL, cSrcVal, (Guchar)splashRound(state->strokeAlpha * 255), gFalse, gFalse);
+
+ if (vectorAntialias) {
+ if (aaBuf == NULL)
+ return gFalse; // fall back to old behaviour
+ drawAAPixelInit();
+ }
+
+ // idea:
+ // 1. If pipe->noTransparency && !state->blendFunc
+ // -> blit directly into the drawing surface!
+ // -> disable alpha manually.
+ // 2. Otherwise:
+ // - blit also directly, but into an intermediate surface.
+ // Afterwards, blit the intermediate surface using the drawing pipeline.
+ // This is necessary because triangle elements can be on top of each
+ // other, so the complete shading needs to be drawn before opacity is
+ // applied.
+ // - the final step, is performed using a SplashPipe:
+ // - assign the actual color into cSrcVal: pipe uses cSrcVal by reference
+ // - invoke drawPixel(&pipe,X,Y,bNoClip);
+ GBool bDirectBlit = vectorAntialias ? gFalse : pipe.noTransparency && !state->blendFunc;
+ if (!bDirectBlit) {
+ blitTarget = new SplashBitmap(bitmap->getWidth(),
+ bitmap->getHeight(),
+ bitmap->getRowPad(),
+ bitmap->getMode(),
+ gTrue,
+ bitmap->getRowSize() >= 0);
+ bitmapData = blitTarget->getDataPtr();
+ bitmapAlpha = blitTarget->getAlphaPtr();
+
+ // initialisation seems to be necessary:
+ int S = bitmap->getWidth() * bitmap->getHeight();
+ for (int i = 0; i < S; ++i)
+ bitmapAlpha[i] = 0;
+ hasAlpha = gTrue;
+ }
+
+ if (shading->isParameterized()) {
+ double color[3];
+ double colorinterp;
+
+ for (int i = 0; i < shading->getNTriangles(); ++i) {
+ shading->getTriangle(i,
+ xdbl + 0, ydbl + 0, color + 0,
+ xdbl + 1, ydbl + 1, color + 1,
+ xdbl + 2, ydbl + 2, color + 2);
+ for (int m = 0; m < 3; ++m) {
+ xt = xdbl[m] * (double)userToCanvasMatrix[0] + ydbl[m] * (double)userToCanvasMatrix[2] + (double)userToCanvasMatrix[4];
+ yt = xdbl[m] * (double)userToCanvasMatrix[1] + ydbl[m] * (double)userToCanvasMatrix[3] + (double)userToCanvasMatrix[5];
+ xdbl[m] = xt;
+ ydbl[m] = yt;
+ // we operate on scanlines which are integer offsets into the
+ // raster image. The double offsets are of no use here.
+ x[m] = splashRound(xt);
+ y[m] = splashRound(yt);
+ }
+ // sort according to y coordinate to simplify sweep through scanlines:
+ // INSERTION SORT.
+ if (y[0] > y[1]) {
+ Guswap(x[0], x[1]);
+ Guswap(y[0], y[1]);
+ Guswap(color[0], color[1]);
+ }
+ // first two are sorted.
+ assert(y[0] <= y[1]);
+ if (y[1] > y[2]) {
+ int tmpX = x[2];
+ int tmpY = y[2];
+ double tmpC = color[2];
+ x[2] = x[1]; y[2] = y[1]; color[2] = color[1];
+
+ if (y[0] > tmpY) {
+ x[1] = x[0]; y[1] = y[0]; color[1] = color[0];
+ x[0] = tmpX; y[0] = tmpY; color[0] = tmpC;
+ } else {
+ x[1] = tmpX; y[1] = tmpY; color[1] = tmpC;
+ }
+ }
+ // first three are sorted
+ assert(y[0] <= y[1]);
+ assert(y[1] <= y[2]);
+ /////
+
+ // this here is det( T ) == 0
+ // where T is the matrix to map to barycentric coordinates.
+ if ((x[0] - x[2]) * (y[1] - y[2]) - (x[1] - x[2]) * (y[0] - y[2]) == 0)
+ continue; // degenerate triangle.
+
+ // this here initialises the scanline generation.
+ // We start with low Y coordinates and sweep up to the large Y
+ // coordinates.
+ //
+ // scanEdgeL[m] in {0,1,2} m=0,1
+ // scanEdgeR[m] in {0,1,2} m=0,1
+ //
+ // are the two edges between which scanlines are (currently)
+ // sweeped. The values {0,1,2} are indices into 'x' and 'y'.
+ // scanEdgeL[0] = 0 means: the left scan edge has (x[0],y[0]) as vertex.
+ //
+ scanEdgeL[0] = 0;
+ scanEdgeR[0] = 0;
+ if (y[0] == y[1]) {
+ scanEdgeL[0] = 1;
+ scanEdgeL[1] = scanEdgeR[1] = 2;
+
+ } else {
+ scanEdgeL[1] = 1; scanEdgeR[1] = 2;
+ }
+ assert(y[scanEdgeL[0]] < y[scanEdgeL[1]]);
+ assert(y[scanEdgeR[0]] < y[scanEdgeR[1]]);
+
+ // Ok. Now prepare the linear maps which map the y coordinate of
+ // the current scanline to the corresponding LEFT and RIGHT x
+ // coordinate (which define the scanline).
+ scanLimitMapL[0] = double(x[scanEdgeL[1]] - x[scanEdgeL[0]]) / (y[scanEdgeL[1]] - y[scanEdgeL[0]]);
+ scanLimitMapL[1] = x[scanEdgeL[0]] - y[scanEdgeL[0]] * scanLimitMapL[0];
+ scanLimitMapR[0] = double(x[scanEdgeR[1]] - x[scanEdgeR[0]]) / (y[scanEdgeR[1]] - y[scanEdgeR[0]]);
+ scanLimitMapR[1] = x[scanEdgeR[0]] - y[scanEdgeR[0]] * scanLimitMapR[0];
+
+ xa = y[1] * scanLimitMapL[0] + scanLimitMapL[1];
+ xt = y[1] * scanLimitMapR[0] + scanLimitMapR[1];
+ if (xa > xt) {
+ // I have "left" is to the right of "right".
+ // Exchange sides!
+ Guswap(scanEdgeL[0], scanEdgeR[0]);
+ Guswap(scanEdgeL[1], scanEdgeR[1]);
+ Guswap(scanLimitMapL[0], scanLimitMapR[0]);
+ Guswap(scanLimitMapL[1], scanLimitMapR[1]);
+ // FIXME I'm sure there is a more efficient way to check this.
+ }
+
+ // Same game: we can linearly interpolate the color based on the
+ // current y coordinate (that's correct for triangle
+ // interpolation due to linearity. We could also have done it in
+ // barycentric coordinates, but that's slightly more involved)
+ scanColorMapL[0] = (color[scanEdgeL[1]] - color[scanEdgeL[0]]) / (y[scanEdgeL[1]] - y[scanEdgeL[0]]);
+ scanColorMapL[1] = color[scanEdgeL[0]] - y[scanEdgeL[0]] * scanColorMapL[0];
+ scanColorMapR[0] = (color[scanEdgeR[1]] - color[scanEdgeR[0]]) / (y[scanEdgeR[1]] - y[scanEdgeR[0]]);
+ scanColorMapR[1] = color[scanEdgeR[0]] - y[scanEdgeR[0]] * scanColorMapR[0];
+
+ hasFurtherSegment = (y[1] < y[2]);
+ scanLineOff = y[0] * rowSize;
+
+ for (int Y = y[0]; Y <= y[2]; ++Y, scanLineOff += rowSize) {
+ if (hasFurtherSegment && Y == y[1]) {
+ // SWEEP EVENT: we encountered the next segment.
+ //
+ // switch to next segment, either at left end or at right
+ // end:
+ if (scanEdgeL[1] == 1) {
+ scanEdgeL[0] = 1;
+ scanEdgeL[1] = 2;
+ scanLimitMapL[0] = double(x[scanEdgeL[1]] - x[scanEdgeL[0]]) / (y[scanEdgeL[1]] - y[scanEdgeL[0]]);
+ scanLimitMapL[1] = x[scanEdgeL[0]] - y[scanEdgeL[0]] * scanLimitMapL[0];
+
+ scanColorMapL[0] = (color[scanEdgeL[1]] - color[scanEdgeL[0]]) / (y[scanEdgeL[1]] - y[scanEdgeL[0]]);
+ scanColorMapL[1] = color[scanEdgeL[0]] - y[scanEdgeL[0]] * scanColorMapL[0];
+ } else if (scanEdgeR[1] == 1) {
+ scanEdgeR[0] = 1;
+ scanEdgeR[1] = 2;
+ scanLimitMapR[0] = double(x[scanEdgeR[1]] - x[scanEdgeR[0]]) / (y[scanEdgeR[1]] - y[scanEdgeR[0]]);
+ scanLimitMapR[1] = x[scanEdgeR[0]] - y[scanEdgeR[0]] * scanLimitMapR[0];
+
+ scanColorMapR[0] = (color[scanEdgeR[1]] - color[scanEdgeR[0]]) / (y[scanEdgeR[1]] - y[scanEdgeR[0]]);
+ scanColorMapR[1] = color[scanEdgeR[0]] - y[scanEdgeR[0]] * scanColorMapR[0];
+ }
+ assert( y[scanEdgeL[0]] < y[scanEdgeL[1]] );
+ assert( y[scanEdgeR[0]] < y[scanEdgeR[1]] );
+ hasFurtherSegment = gFalse;
+ }
+
+ yt = Y;
+
+ xa = yt * scanLimitMapL[0] + scanLimitMapL[1];
+ xt = yt * scanLimitMapR[0] + scanLimitMapR[1];
+
+ ca = yt * scanColorMapL[0] + scanColorMapL[1];
+ ct = yt * scanColorMapR[0] + scanColorMapR[1];
+
+ scanLimitL = splashRound(xa);
+ scanLimitR = splashRound(xt);
+
+ // Ok. Now: init the color interpolation depending on the X
+ // coordinate inside of the current scanline:
+ scanColorMap[0] = (scanLimitR == scanLimitL) ? 0. : ((ct - ca) / (scanLimitR - scanLimitL));
+ scanColorMap[1] = ca - scanLimitL * scanColorMap[0];
+
+ // handled by clipping:
+ // assert( scanLimitL >= 0 && scanLimitR < bitmap->getWidth() );
+ assert(scanLimitL <= scanLimitR || abs(scanLimitL - scanLimitR) <= 2); // allow rounding inaccuracies
+ assert(scanLineOff == Y * rowSize);
+
+ colorinterp = scanColorMap[0] * scanLimitL + scanColorMap[1];
+
+ bitmapOff = scanLineOff + scanLimitL * colorComps;
+ for (int X = scanLimitL; X <= scanLimitR && bitmapOff + colorComps <= bitmapOffLimit; ++X, colorinterp += scanColorMap[0], bitmapOff += colorComps) {
+ // FIXME : standard rectangular clipping can be done for a
+ // complete scanline which is faster
+ // --> see SplashClip and its methods
+ if (!clip->test(X, Y))
+ continue;
+
+ assert(fabs(colorinterp - (scanColorMap[0] * X + scanColorMap[1])) < 1e-10);
+ assert(bitmapOff == Y * rowSize + colorComps * X && scanLineOff == Y * rowSize);
+
+ shading->getParameterizedColor(colorinterp, bitmapMode, &bitmapData[bitmapOff]);
+
+ // make the shading visible.
+ // Note that opacity is handled by the bDirectBlit stuff, see
+ // above for comments and below for implementation.
+ if (hasAlpha)
+ bitmapAlpha[Y * bitmapWidth + X] = 255;
+ }
+ }
+ }
+ } else {
+ return gFalse;
+ }
+
+ if (!bDirectBlit) {
+ // ok. Finalize the stuff by blitting the shading into the final
+ // geometry, this time respecting the rendering pipe.
+ int W = blitTarget->getWidth();
+ int H = blitTarget->getHeight();
+ cur = cSrcVal;
+
+ for (int X = 0; X < W; ++X) {
+ for (int Y = 0; Y < H; ++Y) {
+ if (!bitmapAlpha[Y * bitmapWidth + X])
+ continue; // draw only parts of the shading!
+ bitmapOff = Y * rowSize + colorComps * X;
+
+ for (int m = 0; m < colorComps; ++m)
+ cur[m] = bitmapData[bitmapOff + m];
+ if (vectorAntialias) {
+ drawAAPixel(&pipe, X, Y);
+ } else {
+ drawPixel(&pipe, X, Y, gTrue); // no clipping - has already been done.
+ }
+ }
+ }
+
+ delete blitTarget;
+ blitTarget = NULL;
+ }
+
+ return gTrue;
+}
+
+SplashError Splash::blitTransparent(SplashBitmap *src, int xSrc, int ySrc,
+ int xDest, int yDest, int w, int h) {
+ SplashColorPtr p, sp;
+ Guchar *q;
+ int x, y, mask, srcMask;
+
+ if (src->mode != bitmap->mode) {
+ return splashErrModeMismatch;
+ }
+
+ if (unlikely(!bitmap->data)) {
+ return splashErrZeroImage;
+ }
+
+ switch (bitmap->mode) {
+ case splashModeMono1:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + (xDest >> 3)];
+ mask = 0x80 >> (xDest & 7);
+ sp = &src->data[(ySrc + y) * src->rowSize + (xSrc >> 3)];
+ srcMask = 0x80 >> (xSrc & 7);
+ for (x = 0; x < w; ++x) {
+ if (*sp & srcMask) {
+ *p |= mask;
+ } else {
+ *p &= ~mask;
+ }
+ if (!(mask >>= 1)) {
+ mask = 0x80;
+ ++p;
+ }
+ if (!(srcMask >>= 1)) {
+ srcMask = 0x80;
+ ++sp;
+ }
+ }
+ }
+ break;
+ case splashModeMono8:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + xDest];
+ sp = &src->data[(ySrc + y) * bitmap->rowSize + xSrc];
+ for (x = 0; x < w; ++x) {
+ *p++ = *sp++;
+ }
+ }
+ break;
+ case splashModeRGB8:
+ case splashModeBGR8:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + 3 * xDest];
+ sp = &src->data[(ySrc + y) * src->rowSize + 3 * xSrc];
+ for (x = 0; x < w; ++x) {
+ *p++ = *sp++;
+ *p++ = *sp++;
+ *p++ = *sp++;
+ }
+ }
+ break;
+ case splashModeXBGR8:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + 4 * xDest];
+ sp = &src->data[(ySrc + y) * src->rowSize + 4 * xSrc];
+ for (x = 0; x < w; ++x) {
+ *p++ = *sp++;
+ *p++ = *sp++;
+ *p++ = *sp++;
+ *p++ = 255;
+ sp++;
+ }
+ }
+ break;
+#if SPLASH_CMYK
+ case splashModeCMYK8:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + 4 * xDest];
+ sp = &src->data[(ySrc + y) * src->rowSize + 4 * xSrc];
+ for (x = 0; x < w; ++x) {
+ *p++ = *sp++;
+ *p++ = *sp++;
+ *p++ = *sp++;
+ *p++ = *sp++;
+ }
+ }
+ break;
+ case splashModeDeviceN8:
+ for (y = 0; y < h; ++y) {
+ p = &bitmap->data[(yDest + y) * bitmap->rowSize + (SPOT_NCOMPS+4) * xDest];
+ sp = &src->data[(ySrc + y) * src->rowSize + (SPOT_NCOMPS+4) * xSrc];
+ for (x = 0; x < w; ++x) {
+ for (int cp=0; cp < SPOT_NCOMPS+4; cp++)
+ *p++ = *sp++;
+ }
+ }
+ break;
+#endif
+ }
+
+ if (bitmap->alpha) {
+ for (y = 0; y < h; ++y) {
+ q = &bitmap->alpha[(yDest + y) * bitmap->width + xDest];
+ memset(q, 0x00, w);
+ }
+ }
+
+ return splashOk;
+}
+
+SplashPath *Splash::makeStrokePath(SplashPath *path, SplashCoord w,
+ GBool flatten) {
+SplashPath *pathIn, *dashPath, *pathOut;
+ SplashCoord d, dx, dy, wdx, wdy, dxNext, dyNext, wdxNext, wdyNext;
+ SplashCoord crossprod, dotprod, miter, m;
+ GBool first, last, closed;
+ int subpathStart0, subpathStart1, seg, i0, i1, j0, j1, k0, k1;
+ int left0, left1, left2, right0, right1, right2, join0, join1, join2;
+ int leftFirst, rightFirst, firstPt;
+
+ pathOut = new SplashPath();
+
+ if (path->length == 0) {
+ return pathOut;
+ }
+
+ if (flatten) {
+ pathIn = flattenPath(path, state->matrix, state->flatness);
+ if (state->lineDashLength > 0) {
+ dashPath = makeDashedPath(pathIn);
+ delete pathIn;
+ pathIn = dashPath;
+ if (pathIn->length == 0) {
+ delete pathIn;
+ return pathOut;
+ }
+ }
+ } else {
+ pathIn = path;
+ }
+
+ subpathStart0 = subpathStart1 = 0; // make gcc happy
+ seg = 0; // make gcc happy
+ closed = gFalse; // make gcc happy
+ left0 = left1 = right0 = right1 = join0 = join1 = 0; // make gcc happy
+ leftFirst = rightFirst = firstPt = 0; // make gcc happy
+
+ i0 = 0;
+ for (i1 = i0;
+ !(pathIn->flags[i1] & splashPathLast) &&
+ i1 + 1 < pathIn->length &&
+ pathIn->pts[i1+1].x == pathIn->pts[i1].x &&
+ pathIn->pts[i1+1].y == pathIn->pts[i1].y;
+ ++i1) ;
+
+ while (i1 < pathIn->length) {
+ if ((first = pathIn->flags[i0] & splashPathFirst)) {
+ subpathStart0 = i0;
+ subpathStart1 = i1;
+ seg = 0;
+ closed = pathIn->flags[i0] & splashPathClosed;
+ }
+ j0 = i1 + 1;
+ if (j0 < pathIn->length) {
+ for (j1 = j0;
+ !(pathIn->flags[j1] & splashPathLast) &&
+ j1 + 1 < pathIn->length &&
+ pathIn->pts[j1+1].x == pathIn->pts[j1].x &&
+ pathIn->pts[j1+1].y == pathIn->pts[j1].y;
+ ++j1) ;
+ } else {
+ j1 = j0;
+ }
+ if (pathIn->flags[i1] & splashPathLast) {
+ if (first && state->lineCap == splashLineCapRound) {
+ // special case: zero-length subpath with round line caps -->
+ // draw a circle
+ pathOut->moveTo(pathIn->pts[i0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y);
+ pathOut->curveTo(pathIn->pts[i0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y + bezierCircle2 * w,
+ pathIn->pts[i0].x + bezierCircle2 * w,
+ pathIn->pts[i0].y + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].x,
+ pathIn->pts[i0].y + (SplashCoord)0.5 * w);
+ pathOut->curveTo(pathIn->pts[i0].x - bezierCircle2 * w,
+ pathIn->pts[i0].y + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y + bezierCircle2 * w,
+ pathIn->pts[i0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y);
+ pathOut->curveTo(pathIn->pts[i0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y - bezierCircle2 * w,
+ pathIn->pts[i0].x - bezierCircle2 * w,
+ pathIn->pts[i0].y - (SplashCoord)0.5 * w,
+ pathIn->pts[i0].x,
+ pathIn->pts[i0].y - (SplashCoord)0.5 * w);
+ pathOut->curveTo(pathIn->pts[i0].x + bezierCircle2 * w,
+ pathIn->pts[i0].y - (SplashCoord)0.5 * w,
+ pathIn->pts[i0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y - bezierCircle2 * w,
+ pathIn->pts[i0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[i0].y);
+ pathOut->close();
+ }
+ i0 = j0;
+ i1 = j1;
+ continue;
+ }
+ last = pathIn->flags[j1] & splashPathLast;
+ if (last) {
+ k0 = subpathStart1 + 1;
+ } else {
+ k0 = j1 + 1;
+ }
+ for (k1 = k0;
+ !(pathIn->flags[k1] & splashPathLast) &&
+ k1 + 1 < pathIn->length &&
+ pathIn->pts[k1+1].x == pathIn->pts[k1].x &&
+ pathIn->pts[k1+1].y == pathIn->pts[k1].y;
+ ++k1) ;
+
+ // compute the deltas for segment (i1, j0)
+#if USE_FIXEDPOINT
+ // the 1/d value can be small, which introduces significant
+ // inaccuracies in fixed point mode
+ d = splashDist(pathIn->pts[i1].x, pathIn->pts[i1].y,
+ pathIn->pts[j0].x, pathIn->pts[j0].y);
+ dx = (pathIn->pts[j0].x - pathIn->pts[i1].x) / d;
+ dy = (pathIn->pts[j0].y - pathIn->pts[i1].y) / d;
+#else
+ d = (SplashCoord)1 / splashDist(pathIn->pts[i1].x, pathIn->pts[i1].y,
+ pathIn->pts[j0].x, pathIn->pts[j0].y);
+ dx = d * (pathIn->pts[j0].x - pathIn->pts[i1].x);
+ dy = d * (pathIn->pts[j0].y - pathIn->pts[i1].y);
+#endif
+ wdx = (SplashCoord)0.5 * w * dx;
+ wdy = (SplashCoord)0.5 * w * dy;
+
+ // draw the start cap
+ pathOut->moveTo(pathIn->pts[i0].x - wdy, pathIn->pts[i0].y + wdx);
+ if (i0 == subpathStart0) {
+ firstPt = pathOut->length - 1;
+ }
+ if (first && !closed) {
+ switch (state->lineCap) {
+ case splashLineCapButt:
+ pathOut->lineTo(pathIn->pts[i0].x + wdy, pathIn->pts[i0].y - wdx);
+ break;
+ case splashLineCapRound:
+ pathOut->curveTo(pathIn->pts[i0].x - wdy - bezierCircle * wdx,
+ pathIn->pts[i0].y + wdx - bezierCircle * wdy,
+ pathIn->pts[i0].x - wdx - bezierCircle * wdy,
+ pathIn->pts[i0].y - wdy + bezierCircle * wdx,
+ pathIn->pts[i0].x - wdx,
+ pathIn->pts[i0].y - wdy);
+ pathOut->curveTo(pathIn->pts[i0].x - wdx + bezierCircle * wdy,
+ pathIn->pts[i0].y - wdy - bezierCircle * wdx,
+ pathIn->pts[i0].x + wdy - bezierCircle * wdx,
+ pathIn->pts[i0].y - wdx - bezierCircle * wdy,
+ pathIn->pts[i0].x + wdy,
+ pathIn->pts[i0].y - wdx);
+ break;
+ case splashLineCapProjecting:
+ pathOut->lineTo(pathIn->pts[i0].x - wdx - wdy,
+ pathIn->pts[i0].y + wdx - wdy);
+ pathOut->lineTo(pathIn->pts[i0].x - wdx + wdy,
+ pathIn->pts[i0].y - wdx - wdy);
+ pathOut->lineTo(pathIn->pts[i0].x + wdy,
+ pathIn->pts[i0].y - wdx);
+ break;
+ }
+ } else {
+ pathOut->lineTo(pathIn->pts[i0].x + wdy, pathIn->pts[i0].y - wdx);
+ }
+
+ // draw the left side of the segment rectangle
+ left2 = pathOut->length - 1;
+ pathOut->lineTo(pathIn->pts[j0].x + wdy, pathIn->pts[j0].y - wdx);
+
+ // draw the end cap
+ if (last && !closed) {
+ switch (state->lineCap) {
+ case splashLineCapButt:
+ pathOut->lineTo(pathIn->pts[j0].x - wdy, pathIn->pts[j0].y + wdx);
+ break;
+ case splashLineCapRound:
+ pathOut->curveTo(pathIn->pts[j0].x + wdy + bezierCircle * wdx,
+ pathIn->pts[j0].y - wdx + bezierCircle * wdy,
+ pathIn->pts[j0].x + wdx + bezierCircle * wdy,
+ pathIn->pts[j0].y + wdy - bezierCircle * wdx,
+ pathIn->pts[j0].x + wdx,
+ pathIn->pts[j0].y + wdy);
+ pathOut->curveTo(pathIn->pts[j0].x + wdx - bezierCircle * wdy,
+ pathIn->pts[j0].y + wdy + bezierCircle * wdx,
+ pathIn->pts[j0].x - wdy + bezierCircle * wdx,
+ pathIn->pts[j0].y + wdx + bezierCircle * wdy,
+ pathIn->pts[j0].x - wdy,
+ pathIn->pts[j0].y + wdx);
+ break;
+ case splashLineCapProjecting:
+ pathOut->lineTo(pathIn->pts[j0].x + wdy + wdx,
+ pathIn->pts[j0].y - wdx + wdy);
+ pathOut->lineTo(pathIn->pts[j0].x - wdy + wdx,
+ pathIn->pts[j0].y + wdx + wdy);
+ pathOut->lineTo(pathIn->pts[j0].x - wdy,
+ pathIn->pts[j0].y + wdx);
+ break;
+ }
+ } else {
+ pathOut->lineTo(pathIn->pts[j0].x - wdy, pathIn->pts[j0].y + wdx);
+ }
+
+ // draw the right side of the segment rectangle
+ // (NB: if stroke adjustment is enabled, the closepath operation MUST
+ // add a segment because this segment is used for a hint)
+ right2 = pathOut->length - 1;
+ pathOut->close(state->strokeAdjust);
+
+ // draw the join
+ join2 = pathOut->length;
+ if (!last || closed) {
+
+ // compute the deltas for segment (j1, k0)
+#if USE_FIXEDPOINT
+ // the 1/d value can be small, which introduces significant
+ // inaccuracies in fixed point mode
+ d = splashDist(pathIn->pts[j1].x, pathIn->pts[j1].y,
+ pathIn->pts[k0].x, pathIn->pts[k0].y);
+ dxNext = (pathIn->pts[k0].x - pathIn->pts[j1].x) / d;
+ dyNext = (pathIn->pts[k0].y - pathIn->pts[j1].y) / d;
+#else
+ d = (SplashCoord)1 / splashDist(pathIn->pts[j1].x, pathIn->pts[j1].y,
+ pathIn->pts[k0].x, pathIn->pts[k0].y);
+ dxNext = d * (pathIn->pts[k0].x - pathIn->pts[j1].x);
+ dyNext = d * (pathIn->pts[k0].y - pathIn->pts[j1].y);
+#endif
+ wdxNext = (SplashCoord)0.5 * w * dxNext;
+ wdyNext = (SplashCoord)0.5 * w * dyNext;
+
+ // compute the join parameters
+ crossprod = dx * dyNext - dy * dxNext;
+ dotprod = -(dx * dxNext + dy * dyNext);
+ if (dotprod > 0.9999) {
+ // avoid a divide-by-zero -- set miter to something arbitrary
+ // such that sqrt(miter) will exceed miterLimit (and m is never
+ // used in that situation)
+ // (note: the comparison value (0.9999) has to be less than
+ // 1-epsilon, where epsilon is the smallest value
+ // representable in the fixed point format)
+ miter = (state->miterLimit + 1) * (state->miterLimit + 1);
+ m = 0;
+ } else {
+ miter = (SplashCoord)2 / ((SplashCoord)1 - dotprod);
+ if (miter < 1) {
+ // this can happen because of floating point inaccuracies
+ miter = 1;
+ }
+ m = splashSqrt(miter - 1);
+ }
+
+ // round join
+ if (state->lineJoin == splashLineJoinRound) {
+ pathOut->moveTo(pathIn->pts[j0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y);
+ pathOut->curveTo(pathIn->pts[j0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y + bezierCircle2 * w,
+ pathIn->pts[j0].x + bezierCircle2 * w,
+ pathIn->pts[j0].y + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].x,
+ pathIn->pts[j0].y + (SplashCoord)0.5 * w);
+ pathOut->curveTo(pathIn->pts[j0].x - bezierCircle2 * w,
+ pathIn->pts[j0].y + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y + bezierCircle2 * w,
+ pathIn->pts[j0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y);
+ pathOut->curveTo(pathIn->pts[j0].x - (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y - bezierCircle2 * w,
+ pathIn->pts[j0].x - bezierCircle2 * w,
+ pathIn->pts[j0].y - (SplashCoord)0.5 * w,
+ pathIn->pts[j0].x,
+ pathIn->pts[j0].y - (SplashCoord)0.5 * w);
+ pathOut->curveTo(pathIn->pts[j0].x + bezierCircle2 * w,
+ pathIn->pts[j0].y - (SplashCoord)0.5 * w,
+ pathIn->pts[j0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y - bezierCircle2 * w,
+ pathIn->pts[j0].x + (SplashCoord)0.5 * w,
+ pathIn->pts[j0].y);
+
+ } else {
+ pathOut->moveTo(pathIn->pts[j0].x, pathIn->pts[j0].y);
+
+ // angle < 180
+ if (crossprod < 0) {
+ pathOut->lineTo(pathIn->pts[j0].x - wdyNext,
+ pathIn->pts[j0].y + wdxNext);
+ // miter join inside limit
+ if (state->lineJoin == splashLineJoinMiter &&
+ splashSqrt(miter) <= state->miterLimit) {
+ pathOut->lineTo(pathIn->pts[j0].x - wdy + wdx * m,
+ pathIn->pts[j0].y + wdx + wdy * m);
+ pathOut->lineTo(pathIn->pts[j0].x - wdy,
+ pathIn->pts[j0].y + wdx);
+ // bevel join or miter join outside limit
+ } else {
+ pathOut->lineTo(pathIn->pts[j0].x - wdy,
+ pathIn->pts[j0].y + wdx);
+ }
+
+ // angle >= 180
+ } else {
+ pathOut->lineTo(pathIn->pts[j0].x + wdy,
+ pathIn->pts[j0].y - wdx);
+ // miter join inside limit
+ if (state->lineJoin == splashLineJoinMiter &&
+ splashSqrt(miter) <= state->miterLimit) {
+ pathOut->lineTo(pathIn->pts[j0].x + wdy + wdx * m,
+ pathIn->pts[j0].y - wdx + wdy * m);
+ pathOut->lineTo(pathIn->pts[j0].x + wdyNext,
+ pathIn->pts[j0].y - wdxNext);
+ // bevel join or miter join outside limit
+ } else {
+ pathOut->lineTo(pathIn->pts[j0].x + wdyNext,
+ pathIn->pts[j0].y - wdxNext);
+ }
+ }
+ }
+
+ pathOut->close();
+ }
+
+ // add stroke adjustment hints
+ if (state->strokeAdjust) {
+ if (seg == 0 && !closed) {
+ if (state->lineCap == splashLineCapButt) {
+ pathOut->addStrokeAdjustHint(firstPt, left2 + 1,
+ firstPt, firstPt + 1);
+ if (last) {
+ pathOut->addStrokeAdjustHint(firstPt, left2 + 1,
+ left2 + 1, left2 + 2);
+ }
+ } else if (state->lineCap == splashLineCapProjecting) {
+ if (last) {
+ pathOut->addStrokeAdjustHint(firstPt + 1, left2 + 2,
+ firstPt + 1, firstPt + 2);
+ pathOut->addStrokeAdjustHint(firstPt + 1, left2 + 2,
+ left2 + 2, left2 + 3);
+ } else {
+ pathOut->addStrokeAdjustHint(firstPt + 1, left2 + 1,
+ firstPt + 1, firstPt + 2);
+ }
+ }
+ }
+ if (seg >= 1) {
+ if (seg >= 2) {
+ pathOut->addStrokeAdjustHint(left1, right1, left0 + 1, right0);
+ pathOut->addStrokeAdjustHint(left1, right1, join0, left2);
+ } else {
+ pathOut->addStrokeAdjustHint(left1, right1, firstPt, left2);
+ }
+ pathOut->addStrokeAdjustHint(left1, right1, right2 + 1, right2 + 1);
+ }
+ left0 = left1;
+ left1 = left2;
+ right0 = right1;
+ right1 = right2;
+ join0 = join1;
+ join1 = join2;
+ if (seg == 0) {
+ leftFirst = left2;
+ rightFirst = right2;
+ }
+ if (last) {
+ if (seg >= 2) {
+ pathOut->addStrokeAdjustHint(left1, right1, left0 + 1, right0);
+ pathOut->addStrokeAdjustHint(left1, right1,
+ join0, pathOut->length - 1);
+ } else {
+ pathOut->addStrokeAdjustHint(left1, right1,
+ firstPt, pathOut->length - 1);
+ }
+ if (closed) {
+ pathOut->addStrokeAdjustHint(left1, right1, firstPt, leftFirst);
+ pathOut->addStrokeAdjustHint(left1, right1,
+ rightFirst + 1, rightFirst + 1);
+ pathOut->addStrokeAdjustHint(leftFirst, rightFirst,
+ left1 + 1, right1);
+ pathOut->addStrokeAdjustHint(leftFirst, rightFirst,
+ join1, pathOut->length - 1);
+ }
+ if (!closed && seg > 0) {
+ if (state->lineCap == splashLineCapButt) {
+ pathOut->addStrokeAdjustHint(left1 - 1, left1 + 1,
+ left1 + 1, left1 + 2);
+ } else if (state->lineCap == splashLineCapProjecting) {
+ pathOut->addStrokeAdjustHint(left1 - 1, left1 + 2,
+ left1 + 2, left1 + 3);
+ }
+ }
+ }
+ }
+
+ i0 = j0;
+ i1 = j1;
+ ++seg;
+ }
+
+ if (pathIn != path) {
+ delete pathIn;
+ }
+
+ return pathOut;
+}
+
+void Splash::dumpPath(SplashPath *path) {
+ int i;
+
+ for (i = 0; i < path->length; ++i) {
+ printf(" %3d: x=%8.2f y=%8.2f%s%s%s%s\n",
+ i, (double)path->pts[i].x, (double)path->pts[i].y,
+ (path->flags[i] & splashPathFirst) ? " first" : "",
+ (path->flags[i] & splashPathLast) ? " last" : "",
+ (path->flags[i] & splashPathClosed) ? " closed" : "",
+ (path->flags[i] & splashPathCurve) ? " curve" : "");
+ }
+}
+
+void Splash::dumpXPath(SplashXPath *path) {
+ int i;
+
+ for (i = 0; i < path->length; ++i) {
+ printf(" %4d: x0=%8.2f y0=%8.2f x1=%8.2f y1=%8.2f %s%s%s\n",
+ i, (double)path->segs[i].x0, (double)path->segs[i].y0,
+ (double)path->segs[i].x1, (double)path->segs[i].y1,
+ (path->segs[i].flags & splashXPathHoriz) ? "H" : " ",
+ (path->segs[i].flags & splashXPathVert) ? "V" : " ",
+ (path->segs[i].flags & splashXPathFlip) ? "P" : " ");
+ }
+}
+
+SplashError Splash::shadedFill(SplashPath *path, GBool hasBBox,
+ SplashPattern *pattern) {
+ SplashPipe pipe;
+ SplashXPath *xPath;
+ SplashXPathScanner *scanner;
+ int xMinI, yMinI, xMaxI, yMaxI, x0, x1, y;
+ SplashClipResult clipRes;
+
+ if (vectorAntialias && aaBuf == NULL) { // should not happen, but to be secure
+ return splashErrGeneric;
+ }
+ if (path->length == 0) {
+ return splashErrEmptyPath;
+ }
+ xPath = new SplashXPath(path, state->matrix, state->flatness, gTrue);
+ if (vectorAntialias) {
+ xPath->aaScale();
+ }
+ xPath->sort();
+ yMinI = state->clip->getYMinI();
+ yMaxI = state->clip->getYMaxI();
+ if (vectorAntialias && !inShading) {
+ yMinI = yMinI * splashAASize;
+ yMaxI = (yMaxI + 1) * splashAASize - 1;
+ }
+ scanner = new SplashXPathScanner(xPath, gFalse, yMinI, yMaxI);
+
+ // get the min and max x and y values
+ if (vectorAntialias) {
+ scanner->getBBoxAA(&xMinI, &yMinI, &xMaxI, &yMaxI);
+ } else {
+ scanner->getBBox(&xMinI, &yMinI, &xMaxI, &yMaxI);
+ }
+
+ // check clipping
+ if ((clipRes = state->clip->testRect(xMinI, yMinI, xMaxI, yMaxI)) != splashClipAllOutside) {
+ // limit the y range
+ if (yMinI < state->clip->getYMinI()) {
+ yMinI = state->clip->getYMinI();
+ }
+ if (yMaxI > state->clip->getYMaxI()) {
+ yMaxI = state->clip->getYMaxI();
+ }
+
+ pipeInit(&pipe, 0, yMinI, pattern, NULL, (Guchar)splashRound(state->fillAlpha * 255), vectorAntialias && !hasBBox, gFalse);
+
+ // draw the spans
+ if (vectorAntialias) {
+ for (y = yMinI; y <= yMaxI; ++y) {
+ scanner->renderAALine(aaBuf, &x0, &x1, y);
+ if (clipRes != splashClipAllInside) {
+ state->clip->clipAALine(aaBuf, &x0, &x1, y);
+ }
+#if splashAASize == 4
+ if (!hasBBox && y > yMinI && y < yMaxI) {
+ // correct shape on left side if clip is
+ // vertical through the middle of shading:
+ Guchar *p0, *p1, *p2, *p3;
+ Guchar c1, c2, c3, c4;
+ p0 = aaBuf->getDataPtr() + (x0 >> 1);
+ p1 = p0 + aaBuf->getRowSize();
+ p2 = p1 + aaBuf->getRowSize();
+ p3 = p2 + aaBuf->getRowSize();
+ if (x0 & 1) {
+ c1 = (*p0 & 0x0f); c2 =(*p1 & 0x0f); c3 = (*p2 & 0x0f) ; c4 = (*p3 & 0x0f);
+ } else {
+ c1 = (*p0 >> 4); c2 = (*p1 >> 4); c3 = (*p2 >> 4); c4 = (*p3 >> 4);
+ }
+ if ( (c1 & 0x03) == 0x03 && (c2 & 0x03) == 0x03 && (c3 & 0x03) == 0x03 && (c4 & 0x03) == 0x03
+ && c1 == c2 && c2 == c3 && c3 == c4 &&
+ pattern->testPosition(x0 - 1, y) )
+ {
+ Guchar shapeCorrection = (x0 & 1) ? 0x0f : 0xf0;
+ *p0 |= shapeCorrection;
+ *p1 |= shapeCorrection;
+ *p2 |= shapeCorrection;
+ *p3 |= shapeCorrection;
+ }
+ // correct shape on right side if clip is
+ // through the middle of shading:
+ p0 = aaBuf->getDataPtr() + (x1 >> 1);
+ p1 = p0 + aaBuf->getRowSize();
+ p2 = p1 + aaBuf->getRowSize();
+ p3 = p2 + aaBuf->getRowSize();
+ if (x1 & 1) {
+ c1 = (*p0 & 0x0f); c2 =(*p1 & 0x0f); c3 = (*p2 & 0x0f) ; c4 = (*p3 & 0x0f);
+ } else {
+ c1 = (*p0 >> 4); c2 = (*p1 >> 4); c3 = (*p2 >> 4); c4 = (*p3 >> 4);
+ }
+
+ if ( (c1 & 0xc) == 0x0c && (c2 & 0x0c) == 0x0c && (c3 & 0x0c) == 0x0c && (c4 & 0x0c) == 0x0c
+ && c1 == c2 && c2 == c3 && c3 == c4 &&
+ pattern->testPosition(x1 + 1, y) )
+ {
+ Guchar shapeCorrection = (x1 & 1) ? 0x0f : 0xf0;
+ *p0 |= shapeCorrection;
+ *p1 |= shapeCorrection;
+ *p2 |= shapeCorrection;
+ *p3 |= shapeCorrection;
+ }
+ }
+#endif
+ drawAALine(&pipe, x0, x1, y);
+ }
+ } else {
+ SplashClipResult clipRes2;
+ for (y = yMinI; y <= yMaxI; ++y) {
+ while (scanner->getNextSpan(y, &x0, &x1)) {
+ if (clipRes == splashClipAllInside) {
+ drawSpan(&pipe, x0, x1, y, gTrue);
+ } else {
+ // limit the x range
+ if (x0 < state->clip->getXMinI()) {
+ x0 = state->clip->getXMinI();
+ }
+ if (x1 > state->clip->getXMaxI()) {
+ x1 = state->clip->getXMaxI();
+ }
+ clipRes2 = state->clip->testSpan(x0, x1, y);
+ drawSpan(&pipe, x0, x1, y, clipRes2 == splashClipAllInside);
+ }
+ }
+ }
+ }
+ }
+ opClipRes = clipRes;
+
+ delete scanner;
+ delete xPath;
+ return splashOk;
+}