Part 8 of cc/ directory shuffles: resources

cc/picture_pile_base.cc

-// Copyright 2013 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/picture_pile_base.h"
-
-#include "base/logging.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/gfx/rect_conversions.h"
-
-namespace {
-// Dimensions of the tiles in this picture pile as well as the dimensions of
-// the base picture in each tile.
-const int kBasePictureSize = 3000;
-const int kTileGridBorderPixels = 1;
-}
-
-namespace cc {
-
-PicturePileBase::PicturePileBase()
-    : min_contents_scale_(0),
-      background_color_(SkColorSetARGBInline(0, 0, 0, 0)),
-      slow_down_raster_scale_factor_for_debug_(0),
-      num_raster_threads_(0) {
-  tiling_.SetMaxTextureSize(gfx::Size(kBasePictureSize, kBasePictureSize));
-  tile_grid_info_.fTileInterval.setEmpty();
-  tile_grid_info_.fMargin.setEmpty();
-  tile_grid_info_.fOffset.setZero();
-}
-
-PicturePileBase::PicturePileBase(const PicturePileBase* other)
-    : picture_list_map_(other->picture_list_map_),
-      tiling_(other->tiling_),
-      recorded_region_(other->recorded_region_),
-      min_contents_scale_(other->min_contents_scale_),
-      tile_grid_info_(other->tile_grid_info_),
-      background_color_(other->background_color_),
-      slow_down_raster_scale_factor_for_debug_(
-          other->slow_down_raster_scale_factor_for_debug_),
-      num_raster_threads_(other->num_raster_threads_) {
-}
-
-PicturePileBase::PicturePileBase(
-    const PicturePileBase* other, unsigned thread_index)
-    : tiling_(other->tiling_),
-      recorded_region_(other->recorded_region_),
-      min_contents_scale_(other->min_contents_scale_),
-      tile_grid_info_(other->tile_grid_info_),
-      background_color_(other->background_color_),
-      slow_down_raster_scale_factor_for_debug_(
-          other->slow_down_raster_scale_factor_for_debug_),
-      num_raster_threads_(other->num_raster_threads_) {
-  const PictureListMap& other_pic_list_map = other->picture_list_map_;
-  for (PictureListMap::const_iterator map_iter = other_pic_list_map.begin();
-       map_iter != other_pic_list_map.end(); ++map_iter) {
-    PictureList& pic_list = picture_list_map_[map_iter->first];
-    const PictureList& other_pic_list = map_iter->second;
-    for (PictureList::const_iterator pic_iter = other_pic_list.begin();
-         pic_iter != other_pic_list.end(); ++pic_iter) {
-      pic_list.push_back(
-          (*pic_iter)->GetCloneForDrawingOnThread(thread_index));
-    }
-  }
-}
-
-PicturePileBase::~PicturePileBase() {
-}
-
-void PicturePileBase::Resize(gfx::Size new_size) {
-  if (size() == new_size)
-    return;
-
-  gfx::Size old_size = size();
-  tiling_.SetTotalSize(new_size);
-
-  // Find all tiles that contain any pixels outside the new size.
-  std::vector<PictureListMapKey> to_erase;
-  int min_toss_x = tiling_.FirstBorderTileXIndexFromSrcCoord(
-      std::min(old_size.width(), new_size.width()));
-  int min_toss_y = tiling_.FirstBorderTileYIndexFromSrcCoord(
-      std::min(old_size.height(), new_size.height()));
-  for (PictureListMap::iterator iter = picture_list_map_.begin();
-       iter != picture_list_map_.end(); ++iter) {
-    if (iter->first.first < min_toss_x && iter->first.second < min_toss_y)
-      continue;
-    to_erase.push_back(iter->first);
-  }
-
-  for (size_t i = 0; i < to_erase.size(); ++i)
-    picture_list_map_.erase(to_erase[i]);
-}
-
-void PicturePileBase::SetMinContentsScale(float min_contents_scale) {
-  DCHECK(min_contents_scale);
-  if (min_contents_scale_ == min_contents_scale)
-    return;
-
-  // Picture contents are played back scaled. When the final contents scale is
-  // less than 1 (i.e. low res), then multiple recorded pixels will be used
-  // to raster one final pixel.  To avoid splitting a final pixel across
-  // pictures (which would result in incorrect rasterization due to blending), a
-  // buffer margin is added so that any picture can be snapped to integral
-  // final pixels.
-  //
-  // For example, if a 1/4 contents scale is used, then that would be 3 buffer
-  // pixels, since that's the minimum number of pixels to add so that resulting
-  // content can be snapped to a four pixel aligned grid.
-  int buffer_pixels = static_cast<int>(ceil(1 / min_contents_scale) - 1);
-  buffer_pixels = std::max(0, buffer_pixels);
-  SetBufferPixels(buffer_pixels);
-  min_contents_scale_ = min_contents_scale;
-}
-
-void PicturePileBase::SetTileGridSize(const gfx::Size& tile_grid_size) {
-  tile_grid_info_.fTileInterval.set(
-      tile_grid_size.width() - 2 * kTileGridBorderPixels,
-      tile_grid_size.height() - 2 * kTileGridBorderPixels);
-  DCHECK_GT(tile_grid_info_.fTileInterval.width(), 0);
-  DCHECK_GT(tile_grid_info_.fTileInterval.height(), 0);
-  tile_grid_info_.fMargin.set(kTileGridBorderPixels,
-      kTileGridBorderPixels);
-  // Offset the tile grid coordinate space to take into account the fact
-  // that the top-most and left-most tiles do not have top and left borders
-  // respectively.
-  tile_grid_info_.fOffset.set(-kTileGridBorderPixels,
-      -kTileGridBorderPixels);
-}
-
-void PicturePileBase::SetBufferPixels(int new_buffer_pixels) {
-  if (new_buffer_pixels == buffer_pixels())
-    return;
-
-  Clear();
-  tiling_.SetBorderTexels(new_buffer_pixels);
-}
-
-void PicturePileBase::Clear() {
-  picture_list_map_.clear();
-}
-
-void PicturePileBase::UpdateRecordedRegion() {
-  recorded_region_.Clear();
-  for (int x = 0; x < num_tiles_x(); ++x) {
-    for (int y = 0; y < num_tiles_y(); ++y) {
-      if (!HasRecordingAt(x, y))
-        continue;
-      recorded_region_.Union(tile_bounds(x, y));
-    }
-  }
-}
-
-bool PicturePileBase::HasRecordingAt(int x, int y) {
-  PictureListMap::iterator found =
-      picture_list_map_.find(PictureListMapKey(x, y));
-  if (found == picture_list_map_.end())
-    return false;
-  DCHECK(!found->second.empty());
-  return true;
-}
-
-bool PicturePileBase::CanRaster(float contents_scale, gfx::Rect content_rect) {
-  if (tiling_.total_size().IsEmpty())
-    return false;
-  gfx::Rect layer_rect = gfx::ToEnclosingRect(
-      gfx::ScaleRect(content_rect, 1.f / contents_scale));
-  layer_rect.Intersect(gfx::Rect(tiling_.total_size()));
-  return recorded_region_.Contains(layer_rect);
-}
-
-}  // namespace cc