Recycle stencil buffers across render targets.

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 48 matching lines @@
         this->handleDirtyContext();
         tex = this->onCreateCompressedTexture(desc, budgeted, srcData);
     } else {
         this->handleDirtyContext();
         tex = this->onCreateTexture(desc, budgeted, srcData, rowBytes);
         if (tex &&
             (kRenderTarget_GrSurfaceFlag & desc.fFlags) &&
             !(kNoStencil_GrSurfaceFlag & desc.fFlags)) {
             SkASSERT(tex->asRenderTarget());
             // TODO: defer this and attach dynamically
-            if (!this->attachStencilBufferToRenderTarget(tex->asRenderTarget(), budgeted)) {
+            if (!this->attachStencilBufferToRenderTarget(tex->asRenderTarget())) {
                 tex->unref();
                 return NULL;
             }
         }
     }
     if (!this->caps()->reuseScratchTextures() && !isRT) {
         tex->resourcePriv().removeScratchKey();
     }
     if (tex) {
         fStats.incTextureCreates();
         if (srcData) {
             fStats.incTextureUploads();
         }
     }
     return tex;
 }
 
-bool GrGpu::attachStencilBufferToRenderTarget(GrRenderTarget* rt, bool budgeted) {
+bool GrGpu::attachStencilBufferToRenderTarget(GrRenderTarget* rt) {
     SkASSERT(NULL == rt->getStencilBuffer());
-    GrScratchKey sbKey;
-    GrStencilBuffer::ComputeKey(rt->width(), rt->height(), rt->numSamples(), &sbKey);
+    GrUniqueKey sbKey;
+    GrStencilBuffer::ComputeSharedStencilBufferKey(rt->width(), rt->height(), rt->numSamples(),
+                                                   &sbKey);
     SkAutoTUnref<GrStencilBuffer> sb(static_cast<GrStencilBuffer*>(
-        this->getContext()->getResourceCache()->findAndRefScratchResource(sbKey)));
+        this->getContext()->getResourceCache()->findAndRefUniqueResource(sbKey)));
     if (sb) {
         rt->setStencilBuffer(sb);
         bool attached = this->attachStencilBufferToRenderTarget(sb, rt);
         if (!attached) {
             rt->setStencilBuffer(NULL);
         }
         return attached;
     }
-    if (this->createStencilBufferForRenderTarget(rt, budgeted, rt->width(), rt->height())) {
+    if (this->createStencilBufferForRenderTarget(rt, rt->width(), rt->height())) {
         // Right now we're clearing the stencil buffer here after it is
         // attached to an RT for the first time. When we start matching
         // stencil buffers with smaller color targets this will no longer
         // be correct because it won't be guaranteed to clear the entire
         // sb.
         // We used to clear down in the GL subclass using a special purpose
         // FBO. But iOS doesn't allow a stencil-only FBO. It reports unsupported
         // FBO status.
         this->clearStencil(rt);
+        rt->getStencilBuffer()->resourcePriv().setUniqueKey(sbKey);
         return true;
     } else {
         return false;
     }
 }
 
 GrTexture* GrGpu::wrapBackendTexture(const GrBackendTextureDesc& desc) {
     this->handleDirtyContext();
     GrTexture* tex = this->onWrapBackendTexture(desc);
     if (NULL == tex) {
         return NULL;
     }
     // TODO: defer this and attach dynamically
     GrRenderTarget* tgt = tex->asRenderTarget();
-    if (tgt &&
-        !this->attachStencilBufferToRenderTarget(tgt, true /*budgeted*/)) {
+    if (tgt && !this->attachStencilBufferToRenderTarget(tgt)) {
         tex->unref();
         return NULL;
     } else {
         return tex;
     }
 }
 
 GrRenderTarget* GrGpu::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
     this->handleDirtyContext();
     return this->onWrapBackendRenderTarget(desc);
@@ skipping 176 matching lines @@
                       GrDrawTarget::PathIndexType indexType,
                       const float transformValues[],
                       GrDrawTarget::PathTransformType transformType,
                       int count,
                       const GrStencilSettings& stencilSettings) {
     this->handleDirtyContext();
     pathRange->willDrawPaths(indices, indexType, count);
     this->onDrawPaths(args, pathRange, indices, indexType, transformValues,
                       transformType, count, stencilSettings);
 }