merging game_engine branch changes into trunk, 2d-filters and opengl speedup

1 files changed, 61 insertions, 0 deletions

diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
new file mode 100644
index 00000000000..8046aacfbb1
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
@@ -0,0 +1,61 @@
+/**
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+#ifndef __RAS_PREWITT2DFILTER
+#define __RAS_PREWITT2DFILTER
+
+char * PrewittFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+uniform vec2 bgl_TextureCoordinateOffset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(bgl_RenderedTexture, 
+                              gl_TexCoord[0].st + bgl_TextureCoordinateOffset[i]);
+    }
+
+    vec4 horizEdge = sample[2] + sample[5] + sample[8] -
+                     (sample[0] + sample[3] + sample[6]);
+
+    vec4 vertEdge = sample[0] + sample[1] + sample[2] -
+                    (sample[6] + sample[7] + sample[8]);
+
+    gl_FragColor.rgb = sqrt((horizEdge.rgb * horizEdge.rgb) + 
+                            (vertEdge.rgb * vertEdge.rgb));
+    gl_FragColor.a = 1.0;
+}
+
+);
+#endif
+