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 "config.h"
   6
   7 #include "cc/image_layer_updater.h"
   8 #include "cc/resource_update_queue.h"
   9
  10 namespace cc {
  11
  12 void ImageLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&)
  13 {
  14     m_updater->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
  15 }
  16
  17 // static
  18 scoped_refptr<ImageLayerUpdater> ImageLayerUpdater::create()
  19 {
  20     return make_scoped_refptr(new ImageLayerUpdater());
  21 }
  22
  23 scoped_ptr<LayerUpdater::Resource> ImageLayerUpdater::createResource(
  24     PrioritizedResourceManager* manager)
  25 {
  26     return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedResource::create(manager)));
  27 }
  28
  29 void ImageLayerUpdater::updateTexture(ResourceUpdateQueue& queue, PrioritizedResource* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
  30 {
  31     // Source rect should never go outside the image pixels, even if this
  32     // is requested because the texture extends outside the image.
  33     gfx::Rect clippedSourceRect = sourceRect;
  34     gfx::Rect imageRect = gfx::Rect(0, 0, m_bitmap.width(), m_bitmap.height());
  35     clippedSourceRect.Intersect(imageRect);
  36
  37     gfx::Vector2d clippedDestOffset = destOffset + gfx::Vector2d(clippedSourceRect.origin() - sourceRect.origin());
  38
  39     ResourceUpdate upload = ResourceUpdate::Create(texture,
  40                                                    &m_bitmap,
  41                                                    imageRect,
  42                                                    clippedSourceRect,
  43                                                    clippedDestOffset);
  44     if (partialUpdate)
  45         queue.appendPartialUpload(upload);
  46     else
  47         queue.appendFullUpload(upload);
  48 }
  49
  50 void ImageLayerUpdater::setBitmap(const SkBitmap& bitmap)
  51 {
  52     m_bitmap = bitmap;
  53 }
  54
  55 }