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authorHamed Zaghaghi <hamed.zaghaghi@gmail.com>2008-02-04 05:33:27 +0300
committerHamed Zaghaghi <hamed.zaghaghi@gmail.com>2008-02-04 05:33:27 +0300
commit47b53510a56e80a6d82589334437ffbc706b5b67 (patch)
treeff48818dab8312318fa61c6130c62960ee6b9c78 /source/gameengine/Rasterizer/RAS_OpenGLFilters
parent2da3bd32dd34e44a326a30c43b33e75dc65ce95a (diff)
parentbf4d79c47b9865a75ab0d6bb5649a8edce53a57d (diff)
merging game_engine branch changes into trunk, 2d-filters and opengl speedup
Diffstat (limited to 'source/gameengine/Rasterizer/RAS_OpenGLFilters')
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h54
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h54
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h53
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h44
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h44
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h56
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Prewitt2DFilter.h61
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h44
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h55
-rw-r--r--source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h60
10 files changed, 525 insertions, 0 deletions
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h
new file mode 100644
index 00000000000..ac4c2456573
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Blur2DFilter.h
@@ -0,0 +1,54 @@
+/**
+ * ***** 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_BLUR2DFILTER
+#define __RAS_BLUR2DFILTER
+
+char * BlurFragmentShader=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]);
+ }
+
+ gl_FragColor = (sample[0] + (2.0*sample[1]) + sample[2] +
+ (2.0*sample[3]) + sample[4] + (2.0*sample[5]) +
+ sample[6] + (2.0*sample[7]) + sample[8]) / 13.0;
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h
new file mode 100644
index 00000000000..44f67af3d75
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Dilation2DFilter.h
@@ -0,0 +1,54 @@
+/**
+ * ***** 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_DILATION2DFILTER
+#define __RAS_DILATION2DFILTER
+
+char * DilationFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+uniform vec2 bgl_TextureCoordinateOffset[9];
+
+void main(void)
+{
+ vec4 sample[9];
+ vec4 maxValue = vec4(0.0);
+
+ for (int i = 0; i < 9; i++)
+ {
+ sample[i] = texture2D(bgl_RenderedTexture,
+ gl_TexCoord[0].st + bgl_TextureCoordinateOffset[i]);
+ maxValue = max(sample[i], maxValue);
+ }
+
+ gl_FragColor = maxValue;
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h
new file mode 100644
index 00000000000..80b6f184c36
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Erosion2DFilter.h
@@ -0,0 +1,53 @@
+/**
+ * ***** 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_EROSION2DFILTER
+#define __RAS_EROSION2DFILTER
+
+char * ErosionFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+uniform vec2 bgl_TextureCoordinateOffset[9];
+
+void main(void)
+{
+ vec4 sample[9];
+ vec4 minValue = vec4(1.0);
+
+ for (int i = 0; i < 9; i++)
+ {
+ sample[i] = texture2D(bgl_RenderedTexture,
+ gl_TexCoord[0].st + bgl_TextureCoordinateOffset[i]);
+ minValue = min(sample[i], minValue);
+ }
+
+ gl_FragColor = minValue;
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h
new file mode 100644
index 00000000000..29cc91814ce
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_GrayScale2DFilter.h
@@ -0,0 +1,44 @@
+/**
+ * ***** 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_GRAYSCALE2DFILTER
+#define __RAS_GRAYSCALE2DFILTER
+
+char * GrayScaleFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+
+void main(void)
+{
+ vec4 texcolor = texture2D(bgl_RenderedTexture, gl_TexCoord[0].st);
+ float gray = dot(texcolor.rgb, vec3(0.299, 0.587, 0.114));
+ gl_FragColor = vec4(gray, gray, gray, texcolor.a);
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h
new file mode 100644
index 00000000000..a3482f9647f
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Invert2DFilter.h
@@ -0,0 +1,44 @@
+/**
+ * ***** 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_INVERT2DFILTER
+#define __RAS_INVERT2DFILTER
+
+char * InvertFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+
+void main(void)
+{
+ vec4 texcolor = texture2D(bgl_RenderedTexture, gl_TexCoord[0].st);
+ gl_FragColor.rgb = 1.0 - texcolor.rgb;
+ gl_FragColor.a = texcolor.a;
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h
new file mode 100644
index 00000000000..636ecdb68aa
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Laplacian2DFilter.h
@@ -0,0 +1,56 @@
+/**
+ * ***** 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_LAPLACION2DFILTER
+#define __RAS_LAPLACION2DFILTER
+
+char * LaplacionFragmentShader=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]);
+ }
+
+ gl_FragColor = (sample[4] * 8.0) -
+ (sample[0] + sample[1] + sample[2] +
+ sample[3] + sample[5] +
+ sample[6] + sample[7] + sample[8]);
+ gl_FragColor = vec4(gl_FragColor.rgb, 1.0);
+}
+);
+#endif
+
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
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h
new file mode 100644
index 00000000000..b56911a48b4
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sepia2DFilter.h
@@ -0,0 +1,44 @@
+/**
+ * ***** 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_SEPIA2DFILTER
+#define __RAS_SEPIA2DFILTER
+
+char * SepiaFragmentShader=STRINGIFY(
+uniform sampler2D bgl_RenderedTexture;
+
+void main(void)
+{
+ vec4 texcolor = texture2D(bgl_RenderedTexture, gl_TexCoord[0].st);
+ float gray = dot(texcolor.rgb, vec3(0.299, 0.587, 0.114));
+ gl_FragColor = vec4(gray * vec3(1.2, 1.0, 0.8), texcolor.a);
+}
+);
+#endif
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h
new file mode 100644
index 00000000000..e5f942a535c
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sharpen2DFilter.h
@@ -0,0 +1,55 @@
+/**
+ * ***** 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_SHARPEN2DFILTER
+#define __RAS_SHARPEN2DFILTER
+
+char * SharpenFragmentShader=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]);
+ }
+
+ gl_FragColor = (sample[4] * 9.0) -
+ (sample[0] + sample[1] + sample[2] +
+ sample[3] + sample[5] +
+ sample[6] + sample[7] + sample[8]);
+}
+);
+#endif
+
diff --git a/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h
new file mode 100644
index 00000000000..545e76601e8
--- /dev/null
+++ b/source/gameengine/Rasterizer/RAS_OpenGLFilters/RAS_Sobel2DFilter.h
@@ -0,0 +1,60 @@
+/**
+ * ***** 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_SOBEL2DFILTER
+#define __RAS_SOBEL2DFILTER
+
+char * SobelFragmentShader=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] + (2.0*sample[5]) + sample[8] -
+ (sample[0] + (2.0*sample[3]) + sample[6]);
+
+ vec4 vertEdge = sample[0] + (2.0*sample[1]) + sample[2] -
+ (sample[6] + (2.0*sample[7]) + sample[8]);
+
+ gl_FragColor.rgb = sqrt((horizEdge.rgb * horizEdge.rgb) +
+ (vertEdge.rgb * vertEdge.rgb));
+ gl_FragColor.a = 1.0;
+}
+);
+#endif
+