Add can-ignore-rect hint to clear call

src/gpu/GrContext.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 "GrContext.h"
@@ skipping 627 matching lines @@
         }
     }
     return true;
 }
 
 
 ////////////////////////////////////////////////////////////////////////////////
 
 void GrContext::clear(const SkIRect* rect,
                       const GrColor color,
+                      bool canIgnoreRect,
                       GrRenderTarget* target) {
     AutoRestoreEffects are;
     AutoCheckFlush acf(this);
-    this->prepareToDraw(NULL, BUFFERED_DRAW, &are, &acf)->clear(rect, color, target);
+    this->prepareToDraw(NULL, BUFFERED_DRAW, &are, &acf)->clear(rect, color, 
+                                                                canIgnoreRect, target);
 }
 
 void GrContext::drawPaint(const GrPaint& origPaint) {
     // set rect to be big enough to fill the space, but not super-huge, so we
     // don't overflow fixed-point implementations
     SkRect r;
     r.setLTRB(0, 0,
               SkIntToScalar(getRenderTarget()->width()),
               SkIntToScalar(getRenderTarget()->height()));
     SkMatrix inverse;
@@ skipping 164 matching lines @@
             // Does the rect bound the RT?
             SkPoint srcSpaceRTQuad[4];
             invM.mapRectToQuad(srcSpaceRTQuad, rtRect);
             if (rect_contains_inclusive(rect, srcSpaceRTQuad[0]) &&
                 rect_contains_inclusive(rect, srcSpaceRTQuad[1]) &&
                 rect_contains_inclusive(rect, srcSpaceRTQuad[2]) &&
                 rect_contains_inclusive(rect, srcSpaceRTQuad[3])) {
                 // Will it blend?
                 GrColor clearColor;
                 if (paint.isOpaqueAndConstantColor(&clearColor)) {
-                    target->clear(NULL, clearColor);
+                    target->clear(NULL, clearColor, true);
                     return;
                 }
             }
         }
     }
 
     SkRect devBoundRect;
     bool useVertexCoverage;
     bool needAA = paint.isAntiAlias() &&
                   !target->getDrawState().getRenderTarget()->isMultisampled();
@@ skipping 962 matching lines @@
         return NULL;
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 #if GR_CACHE_STATS
 void GrContext::printCacheStats() const {
     fTextureCache->printStats();
 }
 #endif