Don't reuse scratch textures update

src/gpu/GrSWMaskHelper.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 "GrSWMaskHelper.h"
 #include "GrDrawState.h"
+#include "GrDrawTargetCaps.h"
 #include "GrGpu.h"
 
 #include "SkStrokeRec.h"
 
 // TODO: try to remove this #include
 #include "GrContext.h"
 
 namespace {
 /*
  * Convert a boolean operation into a transfer mode code
@@ skipping 106 matching lines @@
     texture->set(fContext, desc);
     return NULL != texture->texture();
 }
 
 /**
  * Move the result of the software mask generation back to the gpu
  */
 void GrSWMaskHelper::toTexture(GrTexture *texture) {
     SkAutoLockPixels alp(fBM);
 
+    // If we aren't reusing scratch textures we don't need to flush before
+    // writing since no one else will be using 'texture'
+    bool reuseScratch = fContext->getGpu()->caps()->reuseScratchTextures();
+
     texture->writePixels(0, 0, fBM.width(), fBM.height(),
                          kAlpha_8_GrPixelConfig,
-                         fBM.getPixels(), fBM.rowBytes());
+                         fBM.getPixels(), fBM.rowBytes(),
+                         reuseScratch ? 0 : GrContext::kDontFlush_PixelOpsFlag);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 /**
  * Software rasterizes path to A8 mask (possibly using the context's matrix)
  * and uploads the result to a scratch texture. Returns the resulting
  * texture on success; NULL on failure.
  */
 GrTexture* GrSWMaskHelper::DrawPathMaskToTexture(GrContext* context,
                                                  const SkPath& path,
@@ skipping 46 matching lines @@
     maskMatrix.preConcat(drawState->getViewMatrix());
 
     drawState->addCoverageEffect(
                          GrSimpleTextureEffect::Create(texture,
                                                        maskMatrix,
                                                        GrTextureParams::kNone_FilterMode,
                                                        GrEffect::kPosition_CoordsType))->unref();
 
     target->drawSimpleRect(dstRect);
 }