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authorKarl Berry <karl@freefriends.org>2016-02-15 23:31:35 +0000
committerKarl Berry <karl@freefriends.org>2016-02-15 23:31:35 +0000
commit08bed0cad41932663940d45d7fcc96986c2cca3c (patch)
treeb54bb3a7f70e6a42b9117173b01db776e7c2ab23 /Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h
parentf0f9c5a0cfeffd612a08680752e666fcefd170ed (diff)
rename xpdf-3.04* to xpdf-{src,PATCHES,foolabs} for new convention
git-svn-id: svn://tug.org/texlive/trunk@39736 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h')
-rw-r--r--Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h b/Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h
new file mode 100644
index 00000000000..4e9767be5f6
--- /dev/null
+++ b/Build/source/libs/xpdf/xpdf-src/splash/SplashScreen.h
@@ -0,0 +1,65 @@
+//========================================================================
+//
+// SplashScreen.h
+//
+// Copyright 2003-2013 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef SPLASHSCREEN_H
+#define SPLASHSCREEN_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "SplashTypes.h"
+
+//------------------------------------------------------------------------
+// SplashScreen
+//------------------------------------------------------------------------
+
+class SplashScreen {
+public:
+
+ SplashScreen(SplashScreenParams *params);
+ SplashScreen(SplashScreen *screen);
+ ~SplashScreen();
+
+ SplashScreen *copy() { return new SplashScreen(this); }
+
+ // Return the computed pixel value (0=black, 1=white) for the gray
+ // level <value> at (<x>, <y>).
+ int test(int x, int y, Guchar value) {
+ int xx, yy;
+ xx = x & sizeM1;
+ yy = y & sizeM1;
+ return value < mat[(yy << log2Size) + xx] ? 0 : 1;
+ }
+
+ // Returns true if value is above the white threshold or below the
+ // black threshold, i.e., if the corresponding halftone will be
+ // solid white or black.
+ GBool isStatic(Guchar value) { return value < minVal || value >= maxVal; }
+
+private:
+
+ void buildDispersedMatrix(int i, int j, int val,
+ int delta, int offset);
+ void buildClusteredMatrix();
+ int distance(int x0, int y0, int x1, int y1);
+ void buildSCDMatrix(int r);
+
+ Guchar *mat; // threshold matrix
+ int size; // size of the threshold matrix
+ int sizeM1; // size - 1
+ int log2Size; // log2(size)
+ Guchar minVal; // any pixel value below minVal generates
+ // solid black
+ Guchar maxVal; // any pixel value above maxVal generates
+ // solid white
+};
+
+#endif