Add support for ES3 MSAA.

src/gpu/gl/GrGpuGL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
@@ skipping 754 matching lines @@
             ctx.info().caps()->getMSAACoverageMode(sampleCount);
         GL_ALLOC_CALL(ctx.interface(),
                       RenderbufferStorageMultisampleCoverage(GR_GL_RENDERBUFFER,
                                                         mode.fCoverageSampleCnt,
                                                         mode.fColorSampleCnt,
                                                         format,
                                                         width, height));
         created = (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctx.interface()));
     }
     if (!created) {
+#if GR_GL_IGNORE_ES3_MSAA
         GL_ALLOC_CALL(ctx.interface(),
                       RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
                                                      sampleCount,
                                                      format,
                                                      width, height));
+#else
+        switch (ctx.info().caps()->msFBOType()) {
+            case GrGLCaps::kDesktop_ARB_MSFBOType:
+            case GrGLCaps::kDesktop_EXT_MSFBOType:
+            case GrGLCaps::kES_3_0_MSFBOType:
+                GL_ALLOC_CALL(ctx.interface(),
+                              RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
+                                                             sampleCount,
+                                                             format,
+                                                             width, height));
+                break;
+            case GrGLCaps::kES_Apple_MSFBOType:
+                GL_ALLOC_CALL(ctx.interface(),
+                              RenderbufferStorageMultisampleES2APPLE(GR_GL_RENDERBUFFER,
+                                                                     sampleCount,
+                                                                     format,
+                                                                     width, height));
+                break;
+            case GrGLCaps::kES_EXT_MsToTexture_MSFBOType:
+            case GrGLCaps::kES_IMG_MsToTexture_MSFBOType:
+                GL_ALLOC_CALL(ctx.interface(),
+                              RenderbufferStorageMultisampleES2EXT(GR_GL_RENDERBUFFER,
+                                                                   sampleCount,
+                                                                   format,
+                                                                   width, height));
+                break;
+            case GrGLCaps::kNone_MSFBOType:
+                GrCrash("Shouldn't be here if we don't support multisampled renderbuffers.");
+                break;
+        }
+#endif
         created = (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctx.interface()));
     }
     return created;
 }
 }
 
 bool GrGpuGL::createRenderTargetObjects(int width, int height,
                                         GrGLuint texID,
                                         GrGLRenderTarget::Desc* desc) {
     desc->fMSColorRenderbufferID = 0;
@@ skipping 1497 matching lines @@
 
 namespace {
 // Determines whether glBlitFramebuffer could be used between src and dst.
 inline bool can_blit_framebuffer(const GrSurface* dst,
                                  const GrSurface* src,
                                  const GrGpuGL* gpu,
                                  bool* wouldNeedTempFBO = NULL) {
     if (gpu->isConfigRenderable(dst->config()) &&
         gpu->isConfigRenderable(src->config()) &&
         gpu->glCaps().usesMSAARenderBuffers()) {
+        // ES3 doesn't allow framebuffer blits when the src has MSAA and the configs don't match
+        // or the rects are not the same (not just the same size but have the same edges).
+        if (GrGLCaps::kES_3_0_MSFBOType == gpu->glCaps().msFBOType() &&
+            (src->desc().fSampleCnt > 0 || src->config() != dst->config())) {
+           return false;
+        }
         if (NULL != wouldNeedTempFBO) {
             *wouldNeedTempFBO = NULL == dst->asRenderTarget() || NULL == src->asRenderTarget();
         }
         return true;
     } else {
         return false;
     }
 }
 
 inline bool can_copy_texsubimage(const GrSurface* dst,
@@ skipping 252 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }