xpdf-no-select-disableHEADmaster

1 files changed, 81 insertions, 0 deletions

diff --git a/splash/SplashScreen.h b/splash/SplashScreen.h
new file mode 100644
index 0000000..560e275
--- /dev/null
+++ b/splash/SplashScreen.h
@@ -0,0 +1,81 @@
+//========================================================================
+//
+// 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
+//------------------------------------------------------------------------
+
+typedef Guchar *SplashScreenCursor;
+
+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;
+  }
+
+  // To do a series of tests with the same y value, call
+  // getTestCursor(y), and then call testWithCursor(cursor, x, value)
+  // for each x.
+  SplashScreenCursor getTestCursor(int y) {
+    int yy;
+    yy = y & sizeM1;
+    return &mat[yy << log2Size];
+  }
+
+  int testWithCursor(SplashScreenCursor cursor, int x, Guchar value) {
+    int xx = x & sizeM1;
+    return value >= cursor[xx];
+  }
+
+  // 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