Add ToT WebGL conformance tests : part 9

conformance/ogles/GL2Tests/shader_source/unsuccessfulcompile_frag.frag

+
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform float GrainSize;
+uniform vec3  DarkColor;
+uniform vec3  colorSpread;
+
+varying float lightIntensity; 
+varying vec3 Position;
+
+void main (void)
+{
+    //
+    // cheap noise
+    //
+    vec3 location = Position;
+
+    vec3 floorvec = vec3(floor(Position.x * 10.0), 0.0, floor(Position.z * 10.0));
+    vec3 noise = Position * 10.0 - floorvec - 0.5;
+    noise *= noise;
+    location += noise * 0.12;
+
+    //
+    // distance from axis
+    //
+    float dist = location.x * location.x + location.z * location.z;
+    float grain = dist / GrainSize;
+
+    //
+    // grain effects as function of distance
+    //
+    float brightness = fract(grain);
+    if (brightness > 0.5) 
+        brightness = (1.0 - brightness);
+    vec3 color = DarkColor + 0.5 * brightness * (colorSpread);
+    
+    brightness = fract(grain*7.0);    
+    if (brightness > 0.5) 
+        brightness = 1.0 - brightness;
+    color -= 0.5 * brightness * colorSpread;
+
+    //
+    // also as a function of lines parallel to the axis
+    //
+    brightness = fract(grain*47.0);
+    float line = fract(Position.z + Position.x);
+    float snap = floor(line * 30.0) * (1.0/30.0);
+    if (line < snap + 0.004)
+        color -= 0.5 * brightness * colorSpread;
+
+    //
+    // apply lighting effects from vertex processor
+    //
+    color *= lightIntensity;
+    color = clamp(color, 0.0, 1.0); 
+
+    gl_FragColor = vec4(color, 0.1)
+}