1 files changed, 106 insertions, 0 deletions
diff --git a/xpdf/ShadingImage.h b/xpdf/ShadingImage.h
new file mode 100644
index 0000000..3bbff69
--- /dev/null
+++ b/xpdf/ShadingImage.h
@@ -0,0 +1,106 @@
+//========================================================================
+//
+// ShadingImage.h
+//
+// Convert shading patterns to bitmaps.
+//
+// Copyright 2020 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef SHADINGIMAGE_H
+#define SHADINGIMAGE_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "SplashTypes.h"
+
+class GfxState;
+class GfxShading;
+class SplashBitmap;
+class Splash;
+
+class ShadingImage {
+public:
+
+  // Generate a [mode] bitmap for [shading], using the clipping and
+  // CTM info from [state].  Returns the bitmap and sets [xOut],[yOut]
+  // to the upper-left corner of the region in device space.  Returns
+  // NULL if the clip region is empty.
+  static SplashBitmap *generateBitmap(GfxState *state, GfxShading *shading,
+				      SplashColorMode mode,
+				      GBool reverseVideo,
+				      Splash *parentSplash,
+				      SplashBitmap *parentBitmap,
+				      int *xOut, int *yOut);
+
+
+private:
+
+  static SplashBitmap *generateFunctionBitmap(GfxState *state,
+					      GfxFunctionShading *shading,
+					      SplashColorMode mode,
+					      GBool reverseVideo,
+					      Splash *parentSplash,
+					      SplashBitmap *parentBitmap,
+					      int *xOut, int *yOut);
+  static SplashBitmap *generateAxialBitmap(GfxState *state,
+					   GfxAxialShading *shading,
+					   SplashColorMode mode,
+					   GBool reverseVideo,
+					   Splash *parentSplash,
+					   SplashBitmap *parentBitmap,
+					   int *xOut, int *yOut);
+  static SplashBitmap *generateRadialBitmap(GfxState *state,
+					    GfxRadialShading *shading,
+					    SplashColorMode mode,
+					    GBool reverseVideo,
+					    Splash *parentSplash,
+					    SplashBitmap *parentBitmap,
+					    int *xOut, int *yOut);
+  static SplashBitmap *generateGouraudTriangleBitmap(
+					GfxState *state,
+					GfxGouraudTriangleShading *shading,
+					SplashColorMode mode,
+					GBool reverseVideo,
+					Splash *parentSplash,
+					SplashBitmap *parentBitmap,
+					int *xOut, int *yOut);
+  static void gouraudFillTriangle(GfxState *state, SplashBitmap *bitmap,
+				  SplashColorMode mode,
+				  GBool reverseVideo,
+				  int xMin, int yMin, int xMax, int yMax,
+				  double x0, double y0, double *color0,
+				  double x1, double y1, double *color1,
+				  double x2, double y2, double *color2,
+				  GfxGouraudTriangleShading *shading);
+  static SplashBitmap *generatePatchMeshBitmap(GfxState *state,
+					       GfxPatchMeshShading *shading,
+					       SplashColorMode mode,
+					       GBool reverseVideo,
+					       Splash *parentSplash,
+					       SplashBitmap *parentBitmap,
+					       int *xOut, int *yOut);
+  static void fillPatch(GfxState *state, Splash *splash,
+			SplashColorMode mode, GBool reverseVideo,
+			int xMin, int yMin,
+			GfxPatch *patch,
+			GfxPatchMeshShading *shading,
+			int depth);
+  static void computeShadingColor(GfxState *state,
+				  SplashColorMode mode,
+				  GBool reverseVideo,
+				  GfxColor *color,
+				  SplashColorPtr sColor);
+  static void transformBBox(GfxState *state,
+			    double uxMin, double uyMin,
+			    double uxMax, double uyMax,
+			    double *dxMin, double *dyMin,
+			    double *dxMax, double *dyMax);
+};
+
+#endif