Part 10 of cc/ directory shuffles: layers

cc/image_layer.cc

-// Copyright 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "cc/image_layer.h"
-
-#include "base/compiler_specific.h"
-#include "cc/resources/image_layer_updater.h"
-#include "cc/resources/layer_updater.h"
-#include "cc/resources/prioritized_resource.h"
-#include "cc/resources/resource_update_queue.h"
-#include "cc/trees/layer_tree_host.h"
-
-namespace cc {
-
-scoped_refptr<ImageLayer> ImageLayer::Create() {
-  return make_scoped_refptr(new ImageLayer());
-}
-
-ImageLayer::ImageLayer() : TiledLayer() {}
-
-ImageLayer::~ImageLayer() {}
-
-void ImageLayer::SetBitmap(const SkBitmap& bitmap) {
-  // SetBitmap() currently gets called whenever there is any
-  // style change that affects the layer even if that change doesn't
-  // affect the actual contents of the image (e.g. a CSS animation).
-  // With this check in place we avoid unecessary texture uploads.
-  if (bitmap.pixelRef() && bitmap.pixelRef() == bitmap_.pixelRef())
-    return;
-
-  bitmap_ = bitmap;
-  SetNeedsDisplay();
-}
-
-void ImageLayer::SetTexturePriorities(const PriorityCalculator& priority_calc) {
-  // Update the tile data before creating all the layer's tiles.
-  UpdateTileSizeAndTilingOption();
-
-  TiledLayer::SetTexturePriorities(priority_calc);
-}
-
-void ImageLayer::Update(ResourceUpdateQueue* queue,
-                        const OcclusionTracker* occlusion,
-                        RenderingStats* stats) {
-  CreateUpdaterIfNeeded();
-  if (needs_display_) {
-    updater_->set_bitmap(bitmap_);
-    UpdateTileSizeAndTilingOption();
-    InvalidateContentRect(gfx::Rect(content_bounds()));
-    needs_display_ = false;
-  }
-  TiledLayer::Update(queue, occlusion, stats);
-}
-
-void ImageLayer::CreateUpdaterIfNeeded() {
-  if (updater_)
-    return;
-
-  updater_ = ImageLayerUpdater::Create();
-  GLenum texture_format =
-      layer_tree_host()->GetRendererCapabilities().best_texture_format;
-  SetTextureFormat(texture_format);
-}
-
-LayerUpdater* ImageLayer::Updater() const {
-  return updater_.get();
-}
-
-void ImageLayer::CalculateContentsScale(float ideal_contents_scale,
-                                        bool animating_transform_to_screen,
-                                        float* contents_scale_x,
-                                        float* contents_scale_y,
-                                        gfx::Size* content_bounds) {
-  *contents_scale_x = ImageContentsScaleX();
-  *contents_scale_y = ImageContentsScaleY();
-  *content_bounds = gfx::Size(bitmap_.width(), bitmap_.height());
-}
-
-bool ImageLayer::DrawsContent() const {
-  return !bitmap_.isNull() && TiledLayer::DrawsContent();
-}
-
-float ImageLayer::ImageContentsScaleX() const {
-  if (bounds().IsEmpty() || bitmap_.width() == 0)
-    return 1;
-  return static_cast<float>(bitmap_.width()) / bounds().width();
-}
-
-float ImageLayer::ImageContentsScaleY() const {
-  if (bounds().IsEmpty() || bitmap_.height() == 0)
-    return 1;
-  return static_cast<float>(bitmap_.height()) / bounds().height();
-}
-
-}  // namespace cc