Add GrRenderTarget parameter to GrTextContext::canDraw

src/gpu/GrDistanceFieldTextContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDistanceFieldTextContext.h"
 #include "GrAtlas.h"
 #include "GrBitmapTextContext.h"
@@ skipping 62 matching lines @@
                                                          (context, props, enable));
     textContext->fFallbackTextContext = GrBitmapTextContext::Create(context, props);
 
     return textContext;
 }
 
 GrDistanceFieldTextContext::~GrDistanceFieldTextContext() {
     SkSafeSetNull(fGammaTexture);
 }
 
-bool GrDistanceFieldTextContext::canDraw(const SkPaint& paint, const SkMatrix& viewMatrix) {
+bool GrDistanceFieldTextContext::canDraw(const GrRenderTarget* rt, const SkPaint& paint,
+                                         const SkMatrix& viewMatrix) {
     // TODO: support perspective (need getMaxScale replacement)
     if (viewMatrix.hasPerspective()) {
         return false;
     }
 
     SkScalar maxScale = viewMatrix.getMaxScale();
     SkScalar scaledTextSize = maxScale*paint.getTextSize();
     // Scaling up beyond 2x yields undesireable artifacts
     if (scaledTextSize > 2*kLargeDFFontSize) {
         return false;
@@ skipping 624 matching lines @@
     }
 }
 
 inline void GrDistanceFieldTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }