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-rw-r--r--Build/source/libs/gd/libgd-src/src/gd_rotate.c533
1 files changed, 533 insertions, 0 deletions
diff --git a/Build/source/libs/gd/libgd-src/src/gd_rotate.c b/Build/source/libs/gd/libgd-src/src/gd_rotate.c
new file mode 100644
index 00000000000..eb057e1148e
--- /dev/null
+++ b/Build/source/libs/gd/libgd-src/src/gd_rotate.c
@@ -0,0 +1,533 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "gd.h"
+#include "gd_intern.h"
+#include <math.h>
+
+/*
+ * Rotate function Added on 2003/12
+ * by Pierre-Alain Joye (pierre@php.net)
+ **/
+/* Begin rotate function */
+#ifdef ROTATE_PI
+#undef ROTATE_PI
+#endif /* ROTATE_PI */
+
+typedef int (BGD_STDCALL *FuncPtr)(gdImagePtr, int, int);
+
+#define ROTATE_DEG2RAD 3.1415926535897932384626433832795/180
+void gdImageSkewX (gdImagePtr dst, gdImagePtr src, int uRow, int iOffset, double dWeight, int clrBack, int ignoretransparent)
+{
+ int i, r, g, b, a, clrBackR, clrBackG, clrBackB, clrBackA;
+ FuncPtr f;
+
+ int pxlOldLeft, pxlLeft=0, pxlSrc;
+
+ /* Keep clrBack as color index if required */
+ if (src->trueColor) {
+ pxlOldLeft = clrBack;
+ f = gdImageGetTrueColorPixel;
+ } else {
+ pxlOldLeft = clrBack;
+ clrBackR = gdImageRed(src, clrBack);
+ clrBackG = gdImageGreen(src, clrBack);
+ clrBackB = gdImageBlue(src, clrBack);
+ clrBackA = gdImageAlpha(src, clrBack);
+ clrBack = gdTrueColorAlpha(clrBackR, clrBackG, clrBackB, clrBackA);
+ f = gdImageGetPixel;
+ }
+
+ for (i = 0; i < iOffset; i++) {
+ gdImageSetPixel (dst, i, uRow, clrBack);
+ }
+
+ if (i < dst->sx) {
+ gdImageSetPixel (dst, i, uRow, clrBack);
+ }
+
+ for (i = 0; i < src->sx; i++) {
+ pxlSrc = f (src,i,uRow);
+
+ r = (int)(gdImageRed(src,pxlSrc) * dWeight);
+ g = (int)(gdImageGreen(src,pxlSrc) * dWeight);
+ b = (int)(gdImageBlue(src,pxlSrc) * dWeight);
+ a = (int)(gdImageAlpha(src,pxlSrc) * dWeight);
+
+ pxlLeft = gdImageColorAllocateAlpha(src, r, g, b, a);
+
+ if (pxlLeft == -1) {
+ pxlLeft = gdImageColorClosestAlpha(src, r, g, b, a);
+ }
+
+ r = gdImageRed(src,pxlSrc) - (gdImageRed(src,pxlLeft) - gdImageRed(src,pxlOldLeft));
+ g = gdImageGreen(src,pxlSrc) - (gdImageGreen(src,pxlLeft) - gdImageGreen(src,pxlOldLeft));
+ b = gdImageBlue(src,pxlSrc) - (gdImageBlue(src,pxlLeft) - gdImageBlue(src,pxlOldLeft));
+ a = gdImageAlpha(src,pxlSrc) - (gdImageAlpha(src,pxlLeft) - gdImageAlpha(src,pxlOldLeft));
+
+ if (r>255) {
+ r = 255;
+ }
+
+ if (g>255) {
+ g = 255;
+ }
+
+ if (b>255) {
+ b = 255;
+ }
+
+ if (a>127) {
+ a = 127;
+ }
+
+ if (ignoretransparent && pxlSrc == dst->transparent) {
+ pxlSrc = dst->transparent;
+ } else {
+ pxlSrc = gdImageColorAllocateAlpha(dst, r, g, b, a);
+
+ if (pxlSrc == -1) {
+ pxlSrc = gdImageColorClosestAlpha(dst, r, g, b, a);
+ }
+ }
+
+ if ((i + iOffset >= 0) && (i + iOffset < dst->sx)) {
+ gdImageSetPixel (dst, i+iOffset, uRow, pxlSrc);
+ }
+
+ pxlOldLeft = pxlLeft;
+ }
+
+ i += iOffset;
+
+ if (i < dst->sx) {
+ gdImageSetPixel (dst, i, uRow, pxlLeft);
+ }
+
+ gdImageSetPixel (dst, iOffset, uRow, clrBack);
+
+ i--;
+
+ while (++i < dst->sx) {
+ gdImageSetPixel (dst, i, uRow, clrBack);
+ }
+}
+
+void gdImageSkewY (gdImagePtr dst, gdImagePtr src, int uCol, int iOffset, double dWeight, int clrBack, int ignoretransparent)
+{
+ int i, iYPos=0, r, g, b, a;
+ FuncPtr f;
+ int pxlOldLeft, pxlLeft=0, pxlSrc;
+
+ if (src->trueColor) {
+ f = gdImageGetTrueColorPixel;
+ } else {
+ f = gdImageGetPixel;
+ }
+
+ for (i = 0; i<=iOffset; i++) {
+ gdImageSetPixel (dst, uCol, i, clrBack);
+ }
+ r = (int)((double)gdImageRed(src,clrBack) * dWeight);
+ g = (int)((double)gdImageGreen(src,clrBack) * dWeight);
+ b = (int)((double)gdImageBlue(src,clrBack) * dWeight);
+ a = (int)((double)gdImageAlpha(src,clrBack) * dWeight);
+
+ pxlOldLeft = gdImageColorAllocateAlpha(dst, r, g, b, a);
+
+ for (i = 0; i < src->sy; i++) {
+ pxlSrc = f (src, uCol, i);
+ iYPos = i + iOffset;
+
+ r = (int)((double)gdImageRed(src,pxlSrc) * dWeight);
+ g = (int)((double)gdImageGreen(src,pxlSrc) * dWeight);
+ b = (int)((double)gdImageBlue(src,pxlSrc) * dWeight);
+ a = (int)((double)gdImageAlpha(src,pxlSrc) * dWeight);
+
+ pxlLeft = gdImageColorAllocateAlpha(src, r, g, b, a);
+
+ if (pxlLeft == -1) {
+ pxlLeft = gdImageColorClosestAlpha(src, r, g, b, a);
+ }
+
+ r = gdImageRed(src,pxlSrc) - (gdImageRed(src,pxlLeft) - gdImageRed(src,pxlOldLeft));
+ g = gdImageGreen(src,pxlSrc) - (gdImageGreen(src,pxlLeft) - gdImageGreen(src,pxlOldLeft));
+ b = gdImageBlue(src,pxlSrc) - (gdImageBlue(src,pxlLeft) - gdImageBlue(src,pxlOldLeft));
+ a = gdImageAlpha(src,pxlSrc) - (gdImageAlpha(src,pxlLeft) - gdImageAlpha(src,pxlOldLeft));
+
+ if (r>255) {
+ r = 255;
+ }
+
+ if (g>255) {
+ g = 255;
+ }
+
+ if (b>255) {
+ b = 255;
+ }
+
+ if (a>127) {
+ a = 127;
+ }
+
+ if (ignoretransparent && pxlSrc == dst->transparent) {
+ pxlSrc = dst->transparent;
+ } else {
+ pxlSrc = gdImageColorAllocateAlpha(dst, r, g, b, a);
+
+ if (pxlSrc == -1) {
+ pxlSrc = gdImageColorClosestAlpha(dst, r, g, b, a);
+ }
+ }
+
+ if ((iYPos >= 0) && (iYPos < dst->sy)) {
+ gdImageSetPixel (dst, uCol, iYPos, pxlSrc);
+ }
+
+ pxlOldLeft = pxlLeft;
+ }
+
+ i = iYPos;
+ if (i < dst->sy) {
+ gdImageSetPixel (dst, uCol, i, pxlLeft);
+ }
+
+ i--;
+ while (++i < dst->sy) {
+ gdImageSetPixel (dst, uCol, i, clrBack);
+ }
+}
+
+/* Rotates an image by 90 degrees (counter clockwise) */
+gdImagePtr gdImageRotate90 (gdImagePtr src, int ignoretransparent)
+{
+ int uY, uX;
+ int c,r,g,b,a;
+ gdImagePtr dst;
+ FuncPtr f;
+
+ if (src->trueColor) {
+ f = gdImageGetTrueColorPixel;
+ } else {
+ f = gdImageGetPixel;
+ }
+ dst = gdImageCreateTrueColor(src->sy, src->sx);
+ if (dst != NULL) {
+ int old_blendmode = dst->alphaBlendingFlag;
+ dst->alphaBlendingFlag = 0;
+
+ dst->transparent = src->transparent;
+
+ gdImagePaletteCopy (dst, src);
+
+ for (uY = 0; uY<src->sy; uY++) {
+ for (uX = 0; uX<src->sx; uX++) {
+ c = f (src, uX, uY);
+ if (!src->trueColor) {
+ r = gdImageRed(src,c);
+ g = gdImageGreen(src,c);
+ b = gdImageBlue(src,c);
+ a = gdImageAlpha(src,c);
+ c = gdTrueColorAlpha(r, g, b, a);
+ }
+ if (ignoretransparent && c == dst->transparent) {
+ gdImageSetPixel(dst, uY, (dst->sy - uX - 1), dst->transparent);
+ } else {
+ gdImageSetPixel(dst, uY, (dst->sy - uX - 1), c);
+ }
+ }
+ }
+ dst->alphaBlendingFlag = old_blendmode;
+ }
+
+ return dst;
+}
+
+/* Rotates an image by 180 degrees (counter clockwise) */
+gdImagePtr gdImageRotate180 (gdImagePtr src, int ignoretransparent)
+{
+ int uY, uX;
+ int c,r,g,b,a;
+ gdImagePtr dst;
+ FuncPtr f;
+
+ if (src->trueColor) {
+ f = gdImageGetTrueColorPixel;
+ } else {
+ f = gdImageGetPixel;
+ }
+ dst = gdImageCreateTrueColor(src->sx, src->sy);
+
+ if (dst != NULL) {
+ int old_blendmode = dst->alphaBlendingFlag;
+ dst->alphaBlendingFlag = 0;
+
+ dst->transparent = src->transparent;
+
+ gdImagePaletteCopy (dst, src);
+
+ for (uY = 0; uY<src->sy; uY++) {
+ for (uX = 0; uX<src->sx; uX++) {
+ c = f (src, uX, uY);
+ if (!src->trueColor) {
+ r = gdImageRed(src,c);
+ g = gdImageGreen(src,c);
+ b = gdImageBlue(src,c);
+ a = gdImageAlpha(src,c);
+ c = gdTrueColorAlpha(r, g, b, a);
+ }
+
+ if (ignoretransparent && c == dst->transparent) {
+ gdImageSetPixel(dst, (dst->sx - uX - 1), (dst->sy - uY - 1), dst->transparent);
+ } else {
+ gdImageSetPixel(dst, (dst->sx - uX - 1), (dst->sy - uY - 1), c);
+ }
+ }
+ }
+ dst->alphaBlendingFlag = old_blendmode;
+ }
+
+ return dst;
+}
+
+/* Rotates an image by 270 degrees (counter clockwise) */
+gdImagePtr gdImageRotate270 (gdImagePtr src, int ignoretransparent)
+{
+ int uY, uX;
+ int c,r,g,b,a;
+ gdImagePtr dst;
+ FuncPtr f;
+
+ if (src->trueColor) {
+ f = gdImageGetTrueColorPixel;
+ } else {
+ f = gdImageGetPixel;
+ }
+ dst = gdImageCreateTrueColor (src->sy, src->sx);
+
+ if (dst != NULL) {
+ int old_blendmode = dst->alphaBlendingFlag;
+ dst->alphaBlendingFlag = 0;
+
+ dst->transparent = src->transparent;
+
+ gdImagePaletteCopy (dst, src);
+
+ for (uY = 0; uY<src->sy; uY++) {
+ for (uX = 0; uX<src->sx; uX++) {
+ c = f (src, uX, uY);
+ if (!src->trueColor) {
+ r = gdImageRed(src,c);
+ g = gdImageGreen(src,c);
+ b = gdImageBlue(src,c);
+ a = gdImageAlpha(src,c);
+ c = gdTrueColorAlpha(r, g, b, a);
+ }
+
+ if (ignoretransparent && c == dst->transparent) {
+ gdImageSetPixel(dst, (dst->sx - uY - 1), uX, dst->transparent);
+ } else {
+ gdImageSetPixel(dst, (dst->sx - uY - 1), uX, c);
+ }
+ }
+ }
+ dst->alphaBlendingFlag = old_blendmode;
+ }
+
+ return dst;
+}
+
+gdImagePtr gdImageRotate45 (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent)
+{
+ gdImagePtr dst1,dst2,dst3;
+ double dRadAngle, dSinE, dTan, dShear;
+ double dOffset; /* Variable skew offset */
+ int u, iShear, newx, newy;
+ int clrBackR, clrBackG, clrBackB, clrBackA;
+
+ /* See GEMS I for the algorithm details */
+ dRadAngle = dAngle * ROTATE_DEG2RAD; /* Angle in radians */
+ dSinE = sin (dRadAngle);
+ dTan = tan (dRadAngle / 2.0);
+
+ newx = (int)(src->sx + src->sy * fabs(dTan));
+ newy = src->sy;
+
+ /* 1st shear */
+ dst1 = gdImageCreateTrueColor(newx, newy);
+ /******* Perform 1st shear (horizontal) ******/
+ if (dst1 == NULL) {
+ return NULL;
+ }
+#ifdef HAVE_GD_BUNDLED
+ dst1->alphaBlendingFlag = gdEffectReplace;
+#else
+ gdImageAlphaBlending(dst1, 0);
+#endif
+ if (dAngle == 0.0) {
+ /* Returns copy of src */
+ gdImageCopy (dst1, src,0,0,0,0,src->sx,src->sy);
+ return dst1;
+ }
+
+ gdImagePaletteCopy (dst1, src);
+
+ if (ignoretransparent) {
+ if (gdImageTrueColor(src)) {
+ dst1->transparent = src->transparent;
+ } else {
+
+ dst1->transparent = gdTrueColorAlpha(gdImageRed(src, src->transparent), gdImageBlue(src, src->transparent), gdImageGreen(src, src->transparent), 127);
+ }
+ }
+
+ for (u = 0; u < dst1->sy; u++) {
+ if (dTan >= 0.0) {
+ dShear = ((double)(u + 0.5)) * dTan;
+ } else {
+ dShear = ((double)(u - dst1->sy) + 0.5) * dTan;
+ }
+
+ iShear = (int)floor(dShear);
+ gdImageSkewX(dst1, src, u, iShear, (dShear - iShear), clrBack, ignoretransparent);
+ }
+
+ /*
+ The 1st shear may use the original clrBack as color index
+ Convert it once here
+ */
+ if(!src->trueColor) {
+ clrBackR = gdImageRed(src, clrBack);
+ clrBackG = gdImageGreen(src, clrBack);
+ clrBackB = gdImageBlue(src, clrBack);
+ clrBackA = gdImageAlpha(src, clrBack);
+ clrBack = gdTrueColorAlpha(clrBackR, clrBackG, clrBackB, clrBackA);
+ }
+ /* 2nd shear */
+ newx = dst1->sx;
+
+ if (dSinE > 0.0) {
+ dOffset = (src->sx-1) * dSinE;
+ } else {
+ dOffset = -dSinE * (src->sx - newx);
+ }
+
+ newy = (int) ((double) src->sx * fabs( dSinE ) + (double) src->sy * cos (dRadAngle))+1;
+
+ dst2 = gdImageCreateTrueColor(newx, newy);
+ if (dst2 == NULL) {
+ gdImageDestroy(dst1);
+ return NULL;
+ }
+
+#ifdef HAVE_GD_BUNDLED
+ dst2->alphaBlendingFlag = gdEffectReplace;
+#else
+ gdImageAlphaBlending(dst2, 0);
+#endif
+
+ if (ignoretransparent) {
+ dst2->transparent = dst1->transparent;
+ }
+
+ for (u = 0; u < dst2->sx; u++, dOffset -= dSinE) {
+ iShear = (int)floor (dOffset);
+ gdImageSkewY(dst2, dst1, u, iShear, (dOffset - (double)iShear), clrBack, ignoretransparent);
+ }
+
+ /* 3rd shear */
+ gdImageDestroy(dst1);
+
+ newx = (int) ((double)src->sy * fabs (dSinE) + (double)src->sx * cos (dRadAngle)) + 1;
+ newy = dst2->sy;
+
+ dst3 = gdImageCreateTrueColor(newx, newy);
+ if (dst3 == NULL) {
+ gdImageDestroy(dst2);
+ return NULL;
+ }
+
+#ifdef HAVE_GD_BUNDLED
+ dst3->alphaBlendingFlag = gdEffectReplace;
+#else
+ gdImageAlphaBlending(dst3, 0);
+#endif
+
+ if (ignoretransparent) {
+ dst3->transparent = dst2->transparent;
+ }
+
+ if (dSinE >= 0.0) {
+ dOffset = (double)(src->sx - 1) * dSinE * -dTan;
+ } else {
+ dOffset = dTan * ((double)(src->sx - 1) * -dSinE + (double)(1 - newy));
+ }
+
+ for (u = 0; u < dst3->sy; u++, dOffset += dTan) {
+ int iShear = (int)floor(dOffset);
+ gdImageSkewX(dst3, dst2, u, iShear, (dOffset - iShear), clrBack, ignoretransparent);
+ }
+
+ gdImageDestroy(dst2);
+
+ return dst3;
+}
+
+gdImagePtr gdImageRotate (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent)
+{
+ gdImagePtr pMidImg;
+ gdImagePtr rotatedImg;
+
+ if (src == NULL) {
+ return NULL;
+ }
+
+ if (!gdImageTrueColor(src) && (clrBack < 0 || clrBack>=gdImageColorsTotal(src))) {
+ return NULL;
+ }
+
+ while (dAngle >= 360.0) {
+ dAngle -= 360.0;
+ }
+
+ while (dAngle < 0) {
+ dAngle += 360.0;
+ }
+
+ if (dAngle == 90.00) {
+ return gdImageRotate90(src, ignoretransparent);
+ }
+ if (dAngle == 180.00) {
+ return gdImageRotate180(src, ignoretransparent);
+ }
+ if(dAngle == 270.00) {
+ return gdImageRotate270 (src, ignoretransparent);
+ }
+
+ if ((dAngle > 45.0) && (dAngle <= 135.0)) {
+ pMidImg = gdImageRotate90 (src, ignoretransparent);
+ dAngle -= 90.0;
+ } else if ((dAngle > 135.0) && (dAngle <= 225.0)) {
+ pMidImg = gdImageRotate180 (src, ignoretransparent);
+ dAngle -= 180.0;
+ } else if ((dAngle > 225.0) && (dAngle <= 315.0)) {
+ pMidImg = gdImageRotate270 (src, ignoretransparent);
+ dAngle -= 270.0;
+ } else {
+ return gdImageRotate45 (src, dAngle, clrBack, ignoretransparent);
+ }
+
+ if (pMidImg == NULL) {
+ return NULL;
+ }
+
+ rotatedImg = gdImageRotate45 (pMidImg, dAngle, clrBack, ignoretransparent);
+ gdImageDestroy(pMidImg);
+
+ return rotatedImg;
+}
+/* End Rotate function */
+
+