Dynamically create stencil buffer when needed.

src/gpu/GrClipMaskManager.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrClipMaskManager.h"
 #include "GrAAConvexPathRenderer.h"
 #include "GrAAHairLinePathRenderer.h"
 #include "GrAARectRenderer.h"
 #include "GrDrawTargetCaps.h"
 #include "GrPaint.h"
 #include "GrPathRenderer.h"
 #include "GrRenderTarget.h"
+#include "GrRenderTargetPriv.h"
 #include "GrStencilBuffer.h"
 #include "GrSWMaskHelper.h"
 #include "SkRasterClip.h"
 #include "SkStrokeRec.h"
 #include "SkTLazy.h"
 #include "effects/GrConvexPolyEffect.h"
 #include "effects/GrPorterDuffXferProcessor.h"
 #include "effects/GrRRectEffect.h"
 #include "effects/GrTextureDomain.h"
 
@@ skipping 642 matching lines @@
 // (as opposed to canvas) coordinates
 bool GrClipMaskManager::createStencilClipMask(GrRenderTarget* rt,
                                               int32_t elementsGenID,
                                               GrReducedClip::InitialState initialState,
                                               const GrReducedClip::ElementList& elements,
                                               const SkIRect& clipSpaceIBounds,
                                               const SkIPoint& clipSpaceToStencilOffset) {
     SkASSERT(kNone_ClipMaskType == fCurrClipMaskType);
     SkASSERT(rt);
 
-    // TODO: dynamically attach a SB when needed.
-    GrStencilBuffer* stencilBuffer = rt->getStencilBuffer();
+    GrStencilBuffer* stencilBuffer = rt->renderTargetPriv().attachStencilBuffer();
     if (NULL == stencilBuffer) {
         return false;
     }
 
     if (stencilBuffer->mustRenderClip(elementsGenID, clipSpaceIBounds, clipSpaceToStencilOffset)) {
         stencilBuffer->setLastClip(elementsGenID, clipSpaceIBounds, clipSpaceToStencilOffset);
         // Set the matrix so that rendered clip elements are transformed from clip to stencil space.
         SkVector translate = {
             SkIntToScalar(clipSpaceToStencilOffset.fX),
             SkIntToScalar(clipSpaceToStencilOffset.fY)
@@ skipping 208 matching lines @@
     if (pipelineBuilder->getStencil().isDisabled()) {
         if (GrClipMaskManager::kRespectClip_StencilClipMode == fClipMode) {
             settings = basic_apply_stencil_clip_settings();
         } else {
             return;
         }
     } else {
         settings = pipelineBuilder->getStencil();
     }
 
-    // TODO: dynamically attach a stencil buffer
     int stencilBits = 0;
-    GrStencilBuffer* stencilBuffer = pipelineBuilder->getRenderTarget()->getStencilBuffer();
+    GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
+    GrStencilBuffer* stencilBuffer = rt->renderTargetPriv().attachStencilBuffer();
     if (stencilBuffer) {
         stencilBits = stencilBuffer->bits();
     }
 
     SkASSERT(fClipTarget->caps()->stencilWrapOpsSupport() || !settings.usesWrapOp());
     SkASSERT(fClipTarget->caps()->twoSidedStencilSupport() || !settings.isTwoSided());
     this->adjustStencilParams(&settings, fClipMode, stencilBits);
     ars->set(pipelineBuilder);
     pipelineBuilder->setStencil(settings);
 }
@@ skipping 156 matching lines @@
     fAACache.purgeResources();
 }
 
 void GrClipMaskManager::setClipTarget(GrClipTarget* clipTarget) {
     fClipTarget = clipTarget;
     fAACache.setContext(clipTarget->getContext());
 }
 
 void GrClipMaskManager::adjustPathStencilParams(const GrStencilBuffer* stencilBuffer,
                                                 GrStencilSettings* settings) {
-    // TODO: dynamically attach a stencil buffer
     if (stencilBuffer) {
         int stencilBits = stencilBuffer->bits();
         this->adjustStencilParams(settings, fClipMode, stencilBits);
     }
 }