2d-Filters feature and actuators.

1 files changed, 31 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..a6897bd33d4
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h
@@ -0,0 +1,31 @@
+#ifndef __RAS_PREWITT2DFILTER
+#define __RAS_PREWITT2DFILTER
+
+char * PrewittFragmentShader=STRINGIFY(
+uniform sampler2D sampler0;
+uniform vec2 tc_offset[9];
+
+void main(void)
+{
+    vec4 sample[9];
+
+    for (int i = 0; i < 9; i++)
+    {
+        sample[i] = texture2D(sampler0, 
+                              gl_TexCoord[0].st + tc_offset[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
+