Add dest type hint to SkShader::ContextRec

src/core/SkDraw.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #define __STDC_LIMIT_MACROS
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1877 matching lines @@
 
     // setup our state and function pointer for iterating triangles
     VertState       state(count, indices, indexCount);
     VertState::Proc vertProc = state.chooseProc(vmode);
 
     if (textures || colors) {
         while (vertProc(&state)) {
             if (textures) {
                 SkMatrix tempM;
                 if (texture_to_matrix(state, vertices, textures, &tempM)) {
-                    SkShader::ContextRec rec(p, *fMatrix, &tempM);
+                    SkShader::ContextRec rec(p, *fMatrix, &tempM,
+                                             SkBlitter::PreferredShaderDest(fDst.info()));
                     if (!blitter->resetShaderContext(rec)) {
                         continue;
                     }
                 }
             }
             if (colors) {
                 // Find the context for triShader.
                 SkTriColorShader::TriColorShaderContext* triColorShaderContext;
 
                 SkShader::Context* shaderContext = blitter->getShaderContext();
@@ skipping 146 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }