1 files changed, 46 insertions, 0 deletions
diff --git a/src/libs/graphics/bbox.h b/src/libs/graphics/bbox.h
new file mode 100644
index 0000000..33d3000
--- /dev/null
+++ b/src/libs/graphics/bbox.h
@@ -0,0 +1,46 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef BBOX_H_INCL__
+#define BBOX_H_INCL__
+
+#include "libs/gfxlib.h"
+#include "libs/graphics/tfb_draw.h"
+
+/* Bounding Box operations.  These operations are NOT synchronized.
+ * However, they should only be accessed by TFB_FlushGraphics and
+ * TFB_SwapBuffers, or the routines that they exclusively call -- all
+ * of which are only callable by the thread that is permitted to touch
+ * the screen.  No explicit locks should therefore be required. */
+
+typedef struct {
+	int valid;   // If zero, the next point registered becomes the region
+	RECT region; // The actual modified rectangle
+	RECT clip;   // Points outside of this rectangle are pushed to
+		     // the closest border point
+} TFB_BoundingBox;
+
+extern TFB_BoundingBox TFB_BBox;
+
+void TFB_BBox_RegisterPoint (int x, int y);
+void TFB_BBox_RegisterRect (const RECT *r);
+void TFB_BBox_RegisterCanvas (TFB_Canvas c, int x, int y);
+
+void TFB_BBox_Init (int width, int height);
+void TFB_BBox_Reset (void);
+void TFB_BBox_SetClipRect (const RECT *r);
+
+#endif /* BBOX_H_INCL__ */