Cache render targets that render to wrapped textures

src/gpu/GrGpu.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpu.h"
 
@@ skipping 199 matching lines @@
 
 GrRenderTarget* GrGpu::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc,
                                                GrWrapOwnership ownership) {
     if (!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
         return nullptr;
     }
     this->handleDirtyContext();
     return this->onWrapBackendRenderTarget(desc, ownership);
 }
 
+void GrGpu::computeBackendTextureKeyForWrapAsRenderTarget(
+    const GrBackendTextureDesc& desc, GrUniqueKey* key) {
+    this->onComputeBackendTextureKeyForWrapAsRenderTarget(desc, key);
+}
+
+bool GrGpu::rewrapRenderTargetWithBackendTexture(
+    const GrBackendTextureDesc& desc, GrRenderTarget* rt) {
+    if (!(desc.fFlags & kRenderTarget_GrBackendTextureFlag)) {
+      return nullptr;
+    }
+    if (!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
+        return nullptr;
+    }
+    int maxSize = this->caps()->maxTextureSize();
+    if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
+        return nullptr;
+    }
+    this->handleDirtyContext();
+    return this->onRewrapRenderTargetWithBackendTexture(desc, rt);
+}
+
 GrRenderTarget* GrGpu::wrapBackendTextureAsRenderTarget(const GrBackendTextureDesc& desc) {
     this->handleDirtyContext();
     if (!(desc.fFlags & kRenderTarget_GrBackendTextureFlag)) {
       return nullptr;
     }
     if (!this->caps()->isConfigRenderable(desc.fConfig, desc.fSampleCnt > 0)) {
         return nullptr;
     }
     int maxSize = this->caps()->maxTextureSize();
     if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
@@ skipping 247 matching lines @@
                  int meshCount) {
     if (primProc.numAttribs() > this->caps()->maxVertexAttributes()) {
         fStats.incNumFailedDraws();
         return false;
     }
     this->handleDirtyContext();
 
     this->onDraw(pipeline, primProc, meshes, meshCount);
     return true;
 }