1 files changed, 84 insertions, 0 deletions
diff --git a/splash/SplashXPathScanner.h b/splash/SplashXPathScanner.h
new file mode 100644
index 0000000..39cc0eb
--- /dev/null
+++ b/splash/SplashXPathScanner.h
@@ -0,0 +1,84 @@
+//========================================================================
+//
+// SplashXPathScanner.h
+//
+// Copyright 2003-2013 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef SPLASHXPATHSCANNER_H
+#define SPLASHXPATHSCANNER_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "SplashTypes.h"
+#include "SplashXPath.h"
+
+class GList;
+
+//------------------------------------------------------------------------
+
+// Set this to 0 for antialiasing with 16 levels of gray.
+// Set it to 1 for (much slower) antialiasing with 256 levels of gray.
+#define ANTIALIAS_256 0
+
+//------------------------------------------------------------------------
+// SplashXPathScanner
+//------------------------------------------------------------------------
+
+class SplashXPathScanner {
+public:
+
+  // Create a new SplashXPathScanner object.  <xPathA> must be sorted.
+  SplashXPathScanner(SplashXPath *xPathA, GBool eo,
+		     int yMinA, int yMaxA);
+
+  ~SplashXPathScanner();
+
+  // Compute shape values for a scan line.  Fills in line[] with shape
+  // values for one scan line: ([x0, x1], y).  The values are in [0,
+  // 255].  Also returns the min/max x positions with non-zero shape
+  // values.
+  void getSpan(Guchar *line, int y, int x0, int x1, int *xMin, int *xMax);
+
+  // Like getSpan(), but uses the values 0 and 255 only.  Writes 255
+  // for all pixels which include non-zero area inside the path.
+  void getSpanBinary(Guchar *line, int y, int x0, int x1,
+		     int *xMin, int *xMax);
+
+private:
+
+  void insertSegmentBefore(SplashXPathSeg *s, SplashXPathSeg *sNext);
+  void removeSegment(SplashXPathSeg *s);
+  void moveSegmentAfter(SplashXPathSeg *s, SplashXPathSeg *sPrev);
+  void reset(GBool aa, GBool aaChanged);
+  void skip(int newYBottomI, GBool aa);
+  void advance(GBool aa);
+  void generatePixels(int x0, int x1, Guchar *line, int *xMin, int *xMax);
+  void generatePixelsBinary(int x0, int x1, Guchar *line,
+			    int *xMin, int *xMax);
+  void drawRectangleSpan(Guchar *line, int y, int x0, int x1,
+			 int *xMin, int *xMax);
+  void drawRectangleSpanBinary(Guchar *line, int y, int x0, int x1,
+			       int *xMin, int *xMax);
+
+  SplashXPath *xPath;
+  int eoMask;
+  int yMin, yMax;
+  int rectX0I, rectY0I, rectX1I, rectY1I;
+
+  SplashXPathSeg preSeg, postSeg;
+  SplashXPathSeg *pre, *post;
+
+  GBool resetDone;
+  GBool resetAA;
+  int nextSeg;
+  int yTopI, yBottomI;
+  SplashCoord yTop, yBottom;
+};
+
+#endif