Add new API to allow layer hoisting/atlasing across picture piles

src/gpu/gl/SkGLContextHelper.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "gl/SkGLContextHelper.h"
 #include "GrGLUtil.h"
 
 SkGLContextHelper::SkGLContextHelper()
     : fFBO(0)
     , fColorBufferID(0)
     , fDepthStencilBufferID(0)
     , fGL(NULL) {
 }
 
 SkGLContextHelper::~SkGLContextHelper() {
 
     if (fGL) {
         // TODO: determine why DeleteFramebuffers is generating a GL error in tests
         SK_GL_NOERRCHECK(*this, DeleteFramebuffers(1, &fFBO));
         SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fColorBufferID));
         SK_GL_NOERRCHECK(*this, DeleteRenderbuffers(1, &fDepthStencilBufferID));
     }
 
     SkSafeUnref(fGL);
 }
 
+extern int gBindFrameBufferCount;
+
 bool SkGLContextHelper::init(GrGLStandard forcedGpuAPI, int width,
                              int height) {
     if (fGL) {
         fGL->unref();
         this->destroyGLContext();
     }
 
     fGL = this->createGLContext(forcedGpuAPI);
     if (fGL) {
         const GrGLubyte* temp;
 
         if (!fGL->validate()) {
             fGL = NULL;
             this->destroyGLContext();
             return false;
         }
 
         SK_GL_RET(*this, temp, GetString(GR_GL_VERSION));
         const char* versionStr = reinterpret_cast<const char*>(temp);
         GrGLVersion version = GrGLGetVersionFromString(versionStr);
 
         // clear any existing GL erorrs
         GrGLenum error;
         do {
             SK_GL_RET(*this, error, GetError());
         } while (GR_GL_NO_ERROR != error);
 
         SK_GL(*this, GenFramebuffers(1, &fFBO));
+        gBindFrameBufferCount++;
         SK_GL(*this, BindFramebuffer(GR_GL_FRAMEBUFFER, fFBO));
         SK_GL(*this, GenRenderbuffers(1, &fColorBufferID));
         SK_GL(*this, BindRenderbuffer(GR_GL_RENDERBUFFER, fColorBufferID));
         if (kGLES_GrGLStandard == this->gl()->fStandard) {
             SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER,
                                              GR_GL_RGBA8,
                                              width, height));
         } else {
             SK_GL(*this, RenderbufferStorage(GR_GL_RENDERBUFFER,
                                              GR_GL_RGBA,
@@ skipping 65 matching lines @@
         }
     }
     return false;
 }
 
 void SkGLContextHelper::testAbandon() {
     if (NULL != fGL) {
         fGL->abandon();
     }
 }