Proposed SkCanvas API for preLoading textures to VRAM

src/core/SkDevice.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 "SkDevice.h"
 #include "SkMetaData.h"
 
@@ skipping 137 matching lines @@
     bool result = this->onReadPixels(bmpSubset,
                                      srcRect.fLeft,
                                      srcRect.fTop,
                                      config8888);
     if (result && bmp == &tmp) {
         tmp.swap(*bitmap);
     }
     return result;
 }
 
+void SkBaseDevice::internalPrivate_PreLoad(const SkBitmap& bitmap, const SkIRect& rect) {
+    // derived classes can make use of this information
+}
+
 SkSurface* SkBaseDevice::newSurface(const SkImageInfo&) { return NULL; }
 
 const void* SkBaseDevice::peekPixels(SkImageInfo*, size_t*) { return NULL; }
 
 void SkBaseDevice::drawDRRect(const SkDraw& draw, const SkRRect& outer,
                               const SkRRect& inner, const SkPaint& paint) {
     SkPath path;
     path.addRRect(outer);
     path.addRRect(inner);
     path.setFillType(SkPath::kEvenOdd_FillType);
@@ skipping 18 matching lines @@
     return this->onWritePixels(info, pixels, rowBytes, x, y);
 }
 
 bool SkBaseDevice::onWritePixels(const SkImageInfo&, const void*, size_t, int, int) {
     return false;
 }
 
 #ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
 void SkBaseDevice::writePixels(const SkBitmap&, int x, int y, SkCanvas::Config8888) {}
 #endif