initial preroll api

src/core/SkBitmapProcShader.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 "SkColorPriv.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
@@ skipping 94 matching lines @@
 
     return SkNEW_PLACEMENT_ARGS(storage, BitmapProcShaderContext, (*this, rec, state));
 }
 
 size_t SkBitmapProcShader::contextSize() const {
     // The SkBitmapProcState is stored outside of the context object, with the context holding
     // a pointer to it.
     return sizeof(BitmapProcShaderContext) + sizeof(SkBitmapProcState);
 }
 
+void SkBitmapProcShader::onPreroll() const {
+    SkBitmap bm(fRawBitmap);
+    bm.lockPixels();
+    bm.unlockPixels();
+}
+
 SkBitmapProcShader::BitmapProcShaderContext::BitmapProcShaderContext(
         const SkBitmapProcShader& shader, const ContextRec& rec, SkBitmapProcState* state)
     : INHERITED(shader, rec)
     , fState(state)
 {
     const SkBitmap& bitmap = *fState->fBitmap;
     bool bitmapIsOpaque = bitmap.isOpaque();
 
     // update fFlags
     uint32_t flags = 0;
@@ skipping 330 matching lines @@
 #else
 
 bool SkBitmapProcShader::asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix&,
                                              const SkMatrix*, GrColor*,
                                              GrFragmentProcessor**) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 }
 
 #endif