Add ToT WebGL conformance tests : part 9

conformance/ogles/GL2Tests/get_active_uniform/brick.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 vec3    brickColor;
+uniform vec3    mortarColor;
+uniform float   brickMortarWidth;
+uniform float   brickMortarHeight;
+uniform float   mwf;
+uniform float   mhf;
+
+varying vec3  Position;
+varying float lightIntensity;
+
+void main (void)
+{
+    vec3        ct;
+    float       ss, tt, w, h;
+
+    vec3 pos = Position;
+    
+    ss = pos.x / brickMortarWidth;
+    tt = pos.z / brickMortarHeight;
+
+    if (fract (tt * 0.5) > 0.5)
+        ss += 0.5;
+
+    ss = fract (ss);
+    tt = fract (tt);
+
+    w = step (mwf, ss) - step (1.0 - mwf, ss);
+    h = step (mhf, tt) - step (1.0 - mhf, tt);
+
+    ct = clamp(mix (mortarColor, brickColor, w * h) * lightIntensity, 0.0, 1.0);
+
+    gl_FragColor = vec4 (ct, 1.0);
+}