Add support for creating texture backed images where Skia will delete the texture.

src/gpu/gl/GrGLGpu.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 "GrGLGpu.h"
 #include "GrGLStencilAttachment.h"
@@ skipping 434 matching lines @@
     // By default, GrRenderTargets are GL's normal orientation so that they
     // can be drawn to by the outside world without the client having
     // to render upside down.
     if (kDefault_GrSurfaceOrigin == origin) {
         return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
     } else {
         return origin;
     }
 }
 
-GrTexture* GrGLGpu::onWrapBackendTexture(const GrBackendTextureDesc& desc) {
+GrTexture* GrGLGpu::onWrapBackendTexture(const GrBackendTextureDesc& desc,
+                                         GrWrapOwnership ownership) {
     if (!this->configToGLFormats(desc.fConfig, false, NULL, NULL, NULL)) {
         return NULL;
     }
 
     if (0 == desc.fTextureHandle) {
         return NULL;
     }
 
     int maxSize = this->caps()->maxTextureSize();
     if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
         return NULL;
     }
 
     GrGLTexture::IDDesc idDesc;
     GrSurfaceDesc surfDesc;
 
     idDesc.fTextureID = static_cast<GrGLuint>(desc.fTextureHandle);
-    idDesc.fLifeCycle = GrGpuResource::kWrapped_LifeCycle;
+    
+    switch (ownership) {
+        case kAdopt_GrWrapOwnership:
+            idDesc.fLifeCycle = GrGpuResource::kAdopted_LifeCycle;
+            break;
+        case kBorrow_GrWrapOwnership:
+            idDesc.fLifeCycle = GrGpuResource::kBorrowed_LifeCycle;
+            break;
+    }    
 
     // next line relies on GrBackendTextureDesc's flags matching GrTexture's
     surfDesc.fFlags = (GrSurfaceFlags) desc.fFlags;
     surfDesc.fWidth = desc.fWidth;
     surfDesc.fHeight = desc.fHeight;
     surfDesc.fConfig = desc.fConfig;
     surfDesc.fSampleCnt = SkTMin(desc.fSampleCnt, this->caps()->maxSampleCount());
     bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag);
     // FIXME:  this should be calling resolve_origin(), but Chrome code is currently
     // assuming the old behaviour, which is that backend textures are always
@@ skipping 16 matching lines @@
     } else {
         texture = SkNEW_ARGS(GrGLTexture, (this, surfDesc, idDesc));
     }
     if (NULL == texture) {
         return NULL;
     }
 
     return texture;
 }
 
-GrRenderTarget* GrGLGpu::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& wrapDesc) {
+GrRenderTarget* GrGLGpu::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& wrapDesc,
+                                                   GrWrapOwnership ownership) {
     GrGLRenderTarget::IDDesc idDesc;
     idDesc.fRTFBOID = static_cast<GrGLuint>(wrapDesc.fRenderTargetHandle);
     idDesc.fMSColorRenderbufferID = 0;
     idDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
-    idDesc.fLifeCycle = GrGpuResource::kWrapped_LifeCycle;
+    switch (ownership) {
+        case kAdopt_GrWrapOwnership:
+            idDesc.fLifeCycle = GrGpuResource::kAdopted_LifeCycle;
+            break;
+        case kBorrow_GrWrapOwnership:
+            idDesc.fLifeCycle = GrGpuResource::kBorrowed_LifeCycle;
+            break;
+    }    
 
     GrSurfaceDesc desc;
     desc.fConfig = wrapDesc.fConfig;
     desc.fFlags = kCheckAllocation_GrSurfaceFlag;
     desc.fWidth = wrapDesc.fWidth;
     desc.fHeight = wrapDesc.fHeight;
     desc.fSampleCnt = SkTMin(wrapDesc.fSampleCnt, this->caps()->maxSampleCount());
     desc.fOrigin = resolve_origin(wrapDesc.fOrigin, true);
 
     GrRenderTarget* tgt = SkNEW_ARGS(GrGLRenderTarget, (this, desc, idDesc));
@@ skipping 2553 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }