added support for PLS path rendering

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 263 matching lines @@
         glslCaps->fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3, 2) &&
             ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
     }
     else {
         glslCaps->fDualSourceBlendingSupport = ctxInfo.hasExtension("GL_EXT_blend_func_extended");
 
         glslCaps->fShaderDerivativeSupport = ctxInfo.version() >= GR_GL_VER(3, 0) ||
             ctxInfo.hasExtension("GL_OES_standard_derivatives");
     }
 
+    if (ctxInfo.hasExtension("GL_EXT_shader_pixel_local_storage")) {
+        #define GL_MAX_SHADER_PIXEL_LOCAL_STORAGE_FAST_SIZE_EXT 0x8F63
+        GR_GL_GetIntegerv(gli, GL_MAX_SHADER_PIXEL_LOCAL_STORAGE_FAST_SIZE_EXT, 
+                          &glslCaps->fPixelLocalStorageSize);
+        glslCaps->fPLSPathRenderingSupport = glslCaps->fFBFetchSupport;
+    }
+    else {
+        glslCaps->fPixelLocalStorageSize = 0;
+        glslCaps->fPLSPathRenderingSupport = false;
+    }
+
     /**************************************************************************
      * GrCaps fields
      **************************************************************************/
 
     // We need dual source blending and the ability to disable multisample in order to support mixed
     // samples in every corner case.
     if (fMultisampleDisableSupport &&
         glslCaps->dualSourceBlendingSupport() &&
         fShaderCaps->pathRenderingSupport()) {
         fUsesMixedSamples = ctxInfo.hasExtension("GL_NV_framebuffer_mixed_samples") ||
@@ skipping 226 matching lines @@
 void GrGLCaps::initGLSL(const GrGLContextInfo& ctxInfo) {
     GrGLStandard standard = ctxInfo.standard();
     GrGLVersion version = ctxInfo.version();
 
     /**************************************************************************
     * Caps specific to GrGLSLCaps
     **************************************************************************/
 
     GrGLSLCaps* glslCaps = static_cast<GrGLSLCaps*>(fShaderCaps.get());
     glslCaps->fGLSLGeneration = ctxInfo.glslGeneration();
-
     if (kGLES_GrGLStandard == standard) {
         if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
             glslCaps->fFBFetchNeedsCustomOutput = (version >= GR_GL_VER(3, 0));
             glslCaps->fFBFetchSupport = true;
             glslCaps->fFBFetchColorName = "gl_LastFragData[0]";
             glslCaps->fFBFetchExtensionString = "GL_EXT_shader_framebuffer_fetch";
         }
         else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
             // Actually, we haven't seen an ES3.0 device with this extension yet, so we don't know
             glslCaps->fFBFetchNeedsCustomOutput = false;
@@ skipping 1045 matching lines @@
         for (int j = 0; j < kExternalFormatUsageCnt; ++j) {
             SkASSERT(defaultEntry.fFormats.fExternalFormat[j] !=
                      fConfigTable[i].fFormats.fExternalFormat[j]);
         }
         SkASSERT(defaultEntry.fFormats.fExternalType != fConfigTable[i].fFormats.fExternalType);
     }
 #endif
 }
 
 void GrGLCaps::onApplyOptionsOverrides(const GrContextOptions& options) {}