From bace4ea18c03bfcaadab55300bc15290f87540c7 Mon Sep 17 00:00:00 2001
From: Martin Kretzschmar <mkretzschmar@src.gnome.org>
Date: Mon, 17 May 2004 18:12:38 +0000
Subject: Initial revision

---
(limited to 'pdf/splash/SplashClip.h')

diff --git a/pdf/splash/SplashClip.h b/pdf/splash/SplashClip.h
new file mode 100644
index 0000000..34a4cc5
--- /dev/null
+++ b/pdf/splash/SplashClip.h
@@ -0,0 +1,88 @@
+//========================================================================
+//
+// SplashClip.h
+//
+//========================================================================
+
+#ifndef SPLASHCLIP_H
+#define SPLASHCLIP_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "SplashTypes.h"
+
+class SplashPath;
+class SplashXPath;
+class SplashXPathScanner;
+
+//------------------------------------------------------------------------
+
+enum SplashClipResult {
+  splashClipAllInside,
+  splashClipAllOutside,
+  splashClipPartial
+};
+
+//------------------------------------------------------------------------
+// SplashClip
+//------------------------------------------------------------------------
+
+class SplashClip {
+public:
+
+  // Create a clip, for the given rectangle.
+  SplashClip(SplashCoord x0, SplashCoord y0,
+	     SplashCoord x1, SplashCoord y1);
+
+  // Copy a clip.
+  SplashClip *copy() { return new SplashClip(this); }
+
+  ~SplashClip();
+
+  // Reset the clip to a rectangle.
+  void resetToRect(SplashCoord x0, SplashCoord y0,
+		   SplashCoord x1, SplashCoord y1);
+
+  // Intersect the clip with a rectangle.
+  SplashError clipToRect(SplashCoord x0, SplashCoord y0,
+			 SplashCoord x1, SplashCoord y1);
+
+  // Interesect the clip with <path>.
+  SplashError clipToPath(SplashPath *path, SplashCoord flatness,
+			 GBool eo);
+
+  // Returns true if (<x>,<y>) is inside the clip.
+  GBool test(int x, int y);
+
+  // Tests a rectangle against the clipping region.  Returns one of:
+  //   - splashClipAllInside if the entire rectangle is inside the
+  //     clipping region, i.e., all pixels in the rectangle are
+  //     visible
+  //   - splashClipAllOutside if the entire rectangle is outside the
+  //     clipping region, i.e., all the pixels in the rectangle are
+  //     clipped
+  //   - splashClipPartial if the rectangle is part inside and part
+  //     outside the clipping region
+  SplashClipResult testRect(int rectXMin, int rectYMin,
+			    int rectXMax, int rectYMax);
+
+  // Similar to testRect, but tests a horizontal span.
+  SplashClipResult testSpan(int spanXMin, int spanXMax, int spanY);
+
+private:
+
+  SplashClip(SplashClip *clip);
+  void grow(int nPaths);
+
+  int xMin, yMin, xMax, yMax;
+  SplashXPath **paths;
+  Guchar *flags;
+  SplashXPathScanner **scanners;
+  int length, size;
+};
+
+#endif
--
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