Improve tracking of bound FBOs in GrGLGpu.

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 34 matching lines @@
     fTwoFormatLimit = false;
     fFragCoordsConventionSupport = false;
     fVertexArrayObjectSupport = false;
     fES2CompatibilitySupport = false;
     fUseNonVBOVertexAndIndexDynamicData = false;
     fIsCoreProfile = false;
     fFullClearIsFree = false;
     fDropsTileOnZeroDivide = false;
     fFBFetchSupport = false;
     fFBFetchNeedsCustomOutput = false;
+    fPreferBindingToReadAndDrawFramebuffer = false;
+
     fFBFetchColorName = NULL;
     fFBFetchExtensionString = NULL;
 
     fReadPixelsSupportedCache.reset();
 }
 
 GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
     *this = caps;
 }
 
@@ skipping 27 matching lines @@
     fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
     fES2CompatibilitySupport = caps.fES2CompatibilitySupport;
     fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
     fIsCoreProfile = caps.fIsCoreProfile;
     fFullClearIsFree = caps.fFullClearIsFree;
     fDropsTileOnZeroDivide = caps.fDropsTileOnZeroDivide;
     fFBFetchSupport = caps.fFBFetchSupport;
     fFBFetchNeedsCustomOutput = caps.fFBFetchNeedsCustomOutput;
     fFBFetchColorName = caps.fFBFetchColorName;
     fFBFetchExtensionString = caps.fFBFetchExtensionString;
+    fPreferBindingToReadAndDrawFramebuffer = caps.fPreferBindingToReadAndDrawFramebuffer;
 
     return *this;
 }
 
 bool GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
 
     this->reset();
     if (!ctxInfo.isInitialized()) {
         return false;
     }
@@ skipping 160 matching lines @@
             fFBFetchExtensionString = "GL_ARM_shader_framebuffer_fetch";
         }
     }
 
     // Adreno GPUs have a tendency to drop tiles when there is a divide-by-zero in a shader
     fDropsTileOnZeroDivide = kQualcomm_GrGLVendor == ctxInfo.vendor();
 
     this->initFSAASupport(ctxInfo, gli);
     this->initStencilFormats(ctxInfo);
 
+    // Workaround for Mac/Chromium issue.
+#ifdef SK_BUILD_FOR_MAC
+    // This relies on the fact that initFSAASupport() was already called.
+    fPreferBindingToReadAndDrawFramebuffer = ctxInfo.isChromium() && this->usesMSAARenderBuffers();
+#endif
+
     /**************************************************************************
      * GrDrawTargetCaps fields
      **************************************************************************/
     if (kGL_GrGLStandard == standard) {
         // we could also look for GL_ATI_separate_stencil extension or
         // GL_EXT_stencil_two_side but they use different function signatures
         // than GL2.0+ (and than each other).
         fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
         // supported on GL 1.4 and higher or by extension
         fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
@@ skipping 756 matching lines @@
     r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     r.appendf("Fragment coord conventions support: %s\n",
              (fFragCoordsConventionSupport ? "YES": "NO"));
     r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
     r.appendf("Use non-VBO for dynamic data: %s\n",
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
     r.appendf("Drops tile on zero divide: %s\n", (fDropsTileOnZeroDivide ? "YES" : "NO"));
     return r;
 }