cc/image_layer_updater.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/image_layer_updater.h"
   6 #include "cc/resource_update_queue.h"
   7
   8 namespace cc {
   9
  10 void ImageLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&)
  11 {
  12     m_updater->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
  13 }
  14
  15 // static
  16 scoped_refptr<ImageLayerUpdater> ImageLayerUpdater::create()
  17 {
  18     return make_scoped_refptr(new ImageLayerUpdater());
  19 }
  20
  21 scoped_ptr<LayerUpdater::Resource> ImageLayerUpdater::createResource(
  22     PrioritizedResourceManager* manager)
  23 {
  24     return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedResource::create(manager)));
  25 }
  26
  27 void ImageLayerUpdater::updateTexture(ResourceUpdateQueue& queue, PrioritizedResource* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
  28 {
  29     // Source rect should never go outside the image pixels, even if this
  30     // is requested because the texture extends outside the image.
  31     gfx::Rect clippedSourceRect = sourceRect;
  32     gfx::Rect imageRect = gfx::Rect(0, 0, m_bitmap.width(), m_bitmap.height());
  33     clippedSourceRect.Intersect(imageRect);
  34
  35     gfx::Vector2d clippedDestOffset = destOffset + gfx::Vector2d(clippedSourceRect.origin() - sourceRect.origin());
  36
  37     ResourceUpdate upload = ResourceUpdate::Create(texture,
  38                                                    &m_bitmap,
  39                                                    imageRect,
  40                                                    clippedSourceRect,
  41                                                    clippedDestOffset);
  42     if (partialUpdate)
  43         queue.appendPartialUpload(upload);
  44     else
  45         queue.appendFullUpload(upload);
  46 }
  47
  48 void ImageLayerUpdater::setBitmap(const SkBitmap& bitmap)
  49 {
  50     m_bitmap = bitmap;
  51 }
  52
  53 }