--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/platform/graphics/svg/filters/cg/WKNormalMapFilter.cikernel	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+//TODO: We currently ignore the input kernel lengths
+kernel vec4 convolve3x3(sampler image,  float divisor, float bias,
+			vec3 m0, vec3 m1, vec3 m2)
+{
+    vec4 colour = vec4(0.0, 0.0, 0.0, 0.0);
+    vec2 pos= samplerCoord(image);
+    colour =  sample(image, pos + vec2(-1.0, -1.0)) *m0.x;
+    colour += sample(image, pos + vec2(-1.0,  0.0)) *m0.y;
+    colour += sample(image, pos + vec2(-1.0,  1.0)) *m0.z;
+    colour += sample(image, pos + vec2( 0.0, -1.0)) *m1.x;
+    colour += sample(image, pos) * m1.y;
+    colour += sample(image, pos + vec2( 0.0,  1.0))*m1.z;
+    colour += sample(image, pos + vec2( 1.0, -1.0))*m2.x;
+    colour += sample(image, pos + vec2( 1.0,  0.0))*m2.y;
+    colour += sample(image, pos + vec2( 1.0,  1.0))*m2.z;
+    return colour / divisor + bias;
+}
+
+kernel vec4 mergeNormals(sampler Nx, sampler Ny, sampler src, float surfaceScale)
+{
+    vec3 N = vec3(surfaceScale * sample(Nx, samplerCoord(Nx)).a, -surfaceScale * sample(Ny, samplerCoord(Ny)).a, 1.0);
+    N = normalize(N);
+    return vec4(N.x, N.y, N.z, sample(src, samplerCoord(src)).a);
+}