disable kIndex_8 gpu support for now -- seems to always be slower

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 
@@ skipping 690 matching lines @@
                                          bool srgbSupport) {
     GrGLStandard standard = ctxInfo.standard();
     GrGLVersion version = ctxInfo.version();
 
     // Base texture support
     fConfigTextureSupport[kAlpha_8_GrPixelConfig] = true;
     fConfigTextureSupport[kRGB_565_GrPixelConfig] = true;
     fConfigTextureSupport[kRGBA_4444_GrPixelConfig] = true;
     fConfigTextureSupport[kRGBA_8888_GrPixelConfig] = true;
 
-    // Check for 8-bit palette..
-    GrGLint numFormats;
-    GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
-    if (numFormats) {
-        SkAutoSTMalloc<10, GrGLint> formats(numFormats);
-        GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
-        for (int i = 0; i < numFormats; ++i) {
-            if (GR_GL_PALETTE8_RGBA8 == formats[i]) {
-                fConfigTextureSupport[kIndex_8_GrPixelConfig] = true;
-                break;
+    // Disable this for now, while we investigate skbug.com/4333
+    if (false) {
+        // Check for 8-bit palette..
+        GrGLint numFormats;
+        GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
+        if (numFormats) {
+            SkAutoSTMalloc<10, GrGLint> formats(numFormats);
+            GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
+            for (int i = 0; i < numFormats; ++i) {
+                if (GR_GL_PALETTE8_RGBA8 == formats[i]) {
+                    fConfigTextureSupport[kIndex_8_GrPixelConfig] = true;
+                    break;
+                }
             }
         }
     }
 
     // Check for BGRA
     if (kGL_GrGLStandard == standard) {
         fConfigTextureSupport[kBGRA_8888_GrPixelConfig] =
             version >= GR_GL_VER(1,2) || ctxInfo.hasExtension("GL_EXT_bgra");
     } else {
         if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
@@ skipping 458 matching lines @@
         for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             glslCaps->fFloatPrecisions[kGeometry_GrShaderType][p] = 
                                                glslCaps->fFloatPrecisions[kVertex_GrShaderType][p];
         }
     }
 }