Refactored YUV test.

client/deps/glbench/src/yuv2rgb_2.glslv

+/*
+ * Copyright 2010, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 COPYRIGHT
+ * OWNER 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.
+ */
+
 uniform float imageHeight;
 
 attribute vec4 c;
 
 varying vec2 lineCounter;
 varying vec2 yPlane;
 varying vec2 uPlane;
 varying vec2 vPlane;
 
 void main() {
   gl_Position = c;
 #if defined(I915_WORKAROUND)
   gl_TexCoord[0].xy = vec2(c.y * imageHeight / 4.0, 0.0);
-  gl_TexCoord[0].zw = vec2(c.x, (2.0 * c.y + 1.0) / 3.0);
-  gl_TexCoord[1].xy = vec2(c.x / 2.0, (c.y + 1.0) / 6.0);
-  gl_TexCoord[1].zw = vec2(c.x / 2.0, c.y / 6.0);
+  gl_TexCoord[0].zw = vec2(c.x, 1. - (2.0 * c.y + 1.0) / 3.0);
+  gl_TexCoord[1].xy = vec2(c.x / 2.0, 1. - (c.y + 1.0) / 6.0);
+  gl_TexCoord[1].zw = vec2(c.x / 2.0, 1. - c.y / 6.0);
 #else
   lineCounter = vec2(c.y * imageHeight / 4.0, 0.0);
-  yPlane = vec2(c.x, (2.0 * c.y + 1.0) / 3.0);
-  uPlane = vec2(c.x / 2.0, (c.y + 1.0) / 6.0);
-  vPlane = vec2(c.x / 2.0, c.y / 6.0);
+  yPlane = vec2(c.x, 1. - (2.0 * c.y + 1.0) / 3.0);
+  uPlane = vec2(c.x / 2.0, 1. - (c.y + 1.0) / 6.0);
+  vPlane = vec2(c.x / 2.0, 1. - c.y / 6.0);
 #endif
 }