cc: Remove PicturePile and PicturePileImpl.

cc/playback/picture_pile_impl.cc

Index: cc/playback/picture_pile_impl.cc
diff --git a/cc/playback/picture_pile_impl.cc b/cc/playback/picture_pile_impl.cc
deleted file mode 100644
index 736bb917e7fd07475276e5d3af05ad54d895e56f..0000000000000000000000000000000000000000
--- a/cc/playback/picture_pile_impl.cc
+++ /dev/null
@@ -1,461 +0,0 @@
-// Copyright 2012 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 <algorithm>
-#include <limits>
-#include <set>
-
-#include "base/trace_event/trace_event.h"
-#include "cc/base/region.h"
-#include "cc/debug/debug_colors.h"
-#include "cc/playback/picture_pile_impl.h"
-#include "cc/playback/raster_source_helper.h"
-#include "skia/ext/analysis_canvas.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkPictureRecorder.h"
-#include "ui/gfx/geometry/rect_conversions.h"
-
-namespace cc {
-
-scoped_refptr<PicturePileImpl> PicturePileImpl::CreateFromPicturePile(
-    const PicturePile* other,
-    bool can_use_lcd_text) {
-  return make_scoped_refptr(new PicturePileImpl(other, can_use_lcd_text));
-}
-
-PicturePileImpl::PicturePileImpl()
-    : background_color_(SK_ColorTRANSPARENT),
-      requires_clear_(true),
-      can_use_lcd_text_(true),
-      is_solid_color_(false),
-      solid_color_(SK_ColorTRANSPARENT),
-      has_any_recordings_(false),
-      clear_canvas_with_debug_color_(false),
-      min_contents_scale_(0.f),
-      slow_down_raster_scale_factor_for_debug_(0),
-      should_attempt_to_use_distance_field_text_(false),
-      picture_memory_usage_(0) {
-}
-
-PicturePileImpl::PicturePileImpl(const PicturePile* other,
-                                 bool can_use_lcd_text)
-    : picture_map_(other->picture_map_),
-      tiling_(other->tiling_),
-      background_color_(other->background_color_),
-      requires_clear_(other->requires_clear_),
-      can_use_lcd_text_(can_use_lcd_text),
-      is_solid_color_(other->is_solid_color_),
-      solid_color_(other->solid_color_),
-      recorded_viewport_(other->recorded_viewport_),
-      has_any_recordings_(other->has_any_recordings_),
-      clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
-      min_contents_scale_(other->min_contents_scale_),
-      slow_down_raster_scale_factor_for_debug_(
-          other->slow_down_raster_scale_factor_for_debug_),
-      should_attempt_to_use_distance_field_text_(false),
-      picture_memory_usage_(0) {
-  // Figure out the picture size upon construction.
-  base::hash_set<const Picture*> pictures_seen;
-  for (const auto& map_value : picture_map_) {
-    const Picture* picture = map_value.second.get();
-    if (pictures_seen.insert(picture).second)
-      picture_memory_usage_ += picture->ApproximateMemoryUsage();
-  }
-}
-
-PicturePileImpl::PicturePileImpl(const PicturePileImpl* other,
-                                 bool can_use_lcd_text)
-    : picture_map_(other->picture_map_),
-      tiling_(other->tiling_),
-      background_color_(other->background_color_),
-      requires_clear_(other->requires_clear_),
-      can_use_lcd_text_(can_use_lcd_text),
-      is_solid_color_(other->is_solid_color_),
-      solid_color_(other->solid_color_),
-      recorded_viewport_(other->recorded_viewport_),
-      has_any_recordings_(other->has_any_recordings_),
-      clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
-      min_contents_scale_(other->min_contents_scale_),
-      slow_down_raster_scale_factor_for_debug_(
-          other->slow_down_raster_scale_factor_for_debug_),
-      should_attempt_to_use_distance_field_text_(
-          other->should_attempt_to_use_distance_field_text_),
-      picture_memory_usage_(other->picture_memory_usage_) {
-}
-
-PicturePileImpl::~PicturePileImpl() {
-}
-
-void PicturePileImpl::PlaybackToSharedCanvas(SkCanvas* canvas,
-                                             const gfx::Rect& canvas_rect,
-                                             float contents_scale) const {
-  RasterCommon(canvas, NULL, canvas_rect, contents_scale);
-}
-
-void PicturePileImpl::RasterForAnalysis(skia::AnalysisCanvas* canvas,
-                                        const gfx::Rect& canvas_rect,
-                                        float contents_scale) const {
-  RasterCommon(canvas, canvas, canvas_rect, contents_scale);
-}
-
-void PicturePileImpl::PlaybackToCanvas(SkCanvas* canvas,
-                                       const gfx::Rect& canvas_bitmap_rect,
-                                       const gfx::Rect& canvas_playback_rect,
-                                       float contents_scale) const {
-  RasterSourceHelper::PrepareForPlaybackToCanvas(
-      canvas, canvas_bitmap_rect, canvas_bitmap_rect,
-      gfx::Rect(tiling_.tiling_size()), contents_scale, background_color_,
-      clear_canvas_with_debug_color_, requires_clear_);
-  RasterCommon(canvas, NULL, canvas_bitmap_rect, contents_scale);
-}
-
-void PicturePileImpl::CoalesceRasters(const gfx::Rect& canvas_rect,
-                                      const gfx::Rect& content_rect,
-                                      float contents_scale,
-                                      PictureRegionMap* results) const {
-  DCHECK(results);
-  // Rasterize the collection of relevant picture piles.
-  gfx::Rect layer_rect = gfx::ScaleToEnclosingRect(
-      content_rect, 1.f / contents_scale);
-
-  // Make sure pictures don't overlap by keeping track of previous right/bottom.
-  int min_content_left = -1;
-  int min_content_top = -1;
-  int last_row_index = -1;
-  int last_col_index = -1;
-  gfx::Rect last_content_rect;
-
-  // Coalesce rasters of the same picture into different rects:
-  //  - Compute the clip of each of the pile chunks,
-  //  - Subtract it from the canvas rect to get difference region
-  //  - Later, use the difference region to subtract each of the comprising
-  //    rects from the canvas.
-  // Note that in essence, we're trying to mimic clipRegion with intersect op
-  // that also respects the current canvas transform and clip. In order to use
-  // the canvas transform, we must stick to clipRect operations (clipRegion
-  // ignores the transform). Intersect then can be written as subtracting the
-  // negation of the region we're trying to intersect. Luckily, we know that all
-  // of the rects will have to fit into |content_rect|, so we can start with
-  // that and subtract chunk rects to get the region that we need to subtract
-  // from the canvas. Then, we can use clipRect with difference op to subtract
-  // each rect in the region.
-  bool include_borders = true;
-  for (TilingData::Iterator tile_iter(&tiling_, layer_rect, include_borders);
-       tile_iter;
-       ++tile_iter) {
-    PictureMap::const_iterator map_iter = picture_map_.find(tile_iter.index());
-    if (map_iter == picture_map_.end())
-      continue;
-    const Picture* picture = map_iter->second.get();
-    DCHECK(picture);
-
-    // This is intentionally *enclosed* rect, so that the clip is aligned on
-    // integral post-scale content pixels and does not extend past the edges
-    // of the picture chunk's layer rect.  The min_contents_scale enforces that
-    // enough buffer pixels have been added such that the enclosed rect
-    // encompasses all invalidated pixels at any larger scale level.
-    gfx::Rect chunk_rect = PaddedRect(tile_iter.index());
-    gfx::Rect content_clip =
-        gfx::ScaleToEnclosedRect(chunk_rect, contents_scale);
-    DCHECK(!content_clip.IsEmpty()) << "Layer rect: "
-                                    << picture->LayerRect().ToString()
-                                    << "Contents scale: " << contents_scale;
-    content_clip.Intersect(canvas_rect);
-
-    // Make sure iterator goes top->bottom.
-    DCHECK_GE(tile_iter.index_y(), last_row_index);
-    if (tile_iter.index_y() > last_row_index) {
-      // First tile in a new row.
-      min_content_left = content_clip.x();
-      min_content_top = last_content_rect.bottom();
-    } else {
-      // Make sure iterator goes left->right.
-      DCHECK_GT(tile_iter.index_x(), last_col_index);
-      min_content_left = last_content_rect.right();
-      min_content_top = last_content_rect.y();
-    }
-
-    last_col_index = tile_iter.index_x();
-    last_row_index = tile_iter.index_y();
-
-    // Only inset if the content_clip is less than then previous min.
-    int inset_left = std::max(0, min_content_left - content_clip.x());
-    int inset_top = std::max(0, min_content_top - content_clip.y());
-    content_clip.Inset(inset_left, inset_top, 0, 0);
-
-    PictureRegionMap::iterator it = results->find(picture);
-    Region* clip_region;
-    if (it == results->end()) {
-      // The clip for a set of coalesced pictures starts out clipping the entire
-      // canvas.  Each picture added to the set must subtract its own bounds
-      // from the clip region, poking a hole so that the picture is unclipped.
-      clip_region = &(*results)[picture];
-      *clip_region = canvas_rect;
-    } else {
-      clip_region = &it->second;
-    }
-
-    DCHECK(clip_region->Contains(content_clip))
-        << "Content clips should not overlap.";
-    clip_region->Subtract(content_clip);
-    last_content_rect = content_clip;
-  }
-}
-
-void PicturePileImpl::RasterCommon(SkCanvas* canvas,
-                                   SkPicture::AbortCallback* callback,
-                                   const gfx::Rect& canvas_rect,
-                                   float contents_scale) const {
-  DCHECK(contents_scale >= min_contents_scale_);
-
-  canvas->translate(-canvas_rect.x(), -canvas_rect.y());
-  gfx::Rect content_tiling_rect = gfx::ScaleToEnclosingRect(
-      gfx::Rect(tiling_.tiling_size()), contents_scale);
-  content_tiling_rect.Intersect(canvas_rect);
-
-  canvas->clipRect(gfx::RectToSkRect(content_tiling_rect),
-                   SkRegion::kIntersect_Op);
-
-  PictureRegionMap picture_region_map;
-  CoalesceRasters(
-      canvas_rect, content_tiling_rect, contents_scale, &picture_region_map);
-
-#ifndef NDEBUG
-  Region total_clip;
-#endif  // NDEBUG
-
-  // Iterate the coalesced map and use each picture's region
-  // to clip the canvas.
-  for (PictureRegionMap::iterator it = picture_region_map.begin();
-       it != picture_region_map.end();
-       ++it) {
-    const Picture* picture = it->first;
-    Region negated_clip_region = it->second;
-
-#ifndef NDEBUG
-    Region positive_clip = content_tiling_rect;
-    positive_clip.Subtract(negated_clip_region);
-    // Make sure we never rasterize the same region twice.
-    DCHECK(!total_clip.Intersects(positive_clip));
-    total_clip.Union(positive_clip);
-#endif  // NDEBUG
-
-    int repeat_count = std::max(1, slow_down_raster_scale_factor_for_debug_);
-
-    for (int i = 0; i < repeat_count; ++i)
-      picture->Raster(canvas, callback, negated_clip_region, contents_scale);
-  }
-
-#ifndef NDEBUG
-  // Fill the clip with debug color. This allows us to
-  // distinguish between non painted areas and problems with missing
-  // pictures.
-  SkPaint paint;
-  for (Region::Iterator it(total_clip); it.has_rect(); it.next())
-    canvas->clipRect(gfx::RectToSkRect(it.rect()), SkRegion::kDifference_Op);
-  paint.setColor(DebugColors::MissingPictureFillColor());
-  paint.setXfermodeMode(SkXfermode::kSrc_Mode);
-  canvas->drawPaint(paint);
-#endif  // NDEBUG
-}
-
-skia::RefPtr<SkPicture> PicturePileImpl::GetFlattenedPicture() {
-  TRACE_EVENT0("cc", "PicturePileImpl::GetFlattenedPicture");
-
-  gfx::Rect tiling_rect(tiling_.tiling_size());
-  SkPictureRecorder recorder;
-  SkCanvas* canvas =
-      recorder.beginRecording(tiling_rect.width(), tiling_rect.height());
-  if (!tiling_rect.IsEmpty())
-    PlaybackToCanvas(canvas, tiling_rect, tiling_rect, 1.0);
-  skia::RefPtr<SkPicture> picture =
-      skia::AdoptRef(recorder.endRecordingAsPicture());
-
-  return picture;
-}
-
-size_t PicturePileImpl::GetPictureMemoryUsage() const {
-  return picture_memory_usage_;
-}
-
-void PicturePileImpl::PerformSolidColorAnalysis(
-    const gfx::Rect& content_rect,
-    float contents_scale,
-    RasterSource::SolidColorAnalysis* analysis) const {
-  DCHECK(analysis);
-  TRACE_EVENT0("cc", "PicturePileImpl::PerformSolidColorAnalysis");
-
-  gfx::Rect layer_rect = gfx::ScaleToEnclosingRect(
-      content_rect, 1.0f / contents_scale);
-
-  layer_rect.Intersect(gfx::Rect(tiling_.tiling_size()));
-
-  skia::AnalysisCanvas canvas(layer_rect.width(), layer_rect.height());
-
-  RasterForAnalysis(&canvas, layer_rect, 1.0f);
-
-  analysis->is_solid_color = canvas.GetColorIfSolid(&analysis->solid_color);
-}
-
-void PicturePileImpl::GatherDiscardableImages(
-    const gfx::Rect& layer_rect,
-    std::vector<skia::PositionImage>* images) const {
-  DCHECK_EQ(0u, images->size());
-  for (ImageIterator iter(layer_rect, this); iter; ++iter) {
-    images->push_back(*iter);
-  }
-}
-
-bool PicturePileImpl::CoversRect(const gfx::Rect& layer_rect) const {
-  if (tiling_.tiling_size().IsEmpty())
-    return false;
-  gfx::Rect bounded_rect = layer_rect;
-  bounded_rect.Intersect(gfx::Rect(tiling_.tiling_size()));
-
-  // Common case inside of viewport to avoid the slower map lookups.
-  if (recorded_viewport_.Contains(bounded_rect)) {
-    // Sanity check that there are no false positives in recorded_viewport_.
-    DCHECK(CanRasterSlowTileCheck(bounded_rect));
-    return true;
-  }
-
-  return CanRasterSlowTileCheck(bounded_rect);
-}
-
-gfx::Size PicturePileImpl::GetSize() const {
-  return tiling_.tiling_size();
-}
-
-bool PicturePileImpl::IsSolidColor() const {
-  return is_solid_color_;
-}
-
-SkColor PicturePileImpl::GetSolidColor() const {
-  DCHECK(IsSolidColor());
-  return solid_color_;
-}
-
-bool PicturePileImpl::HasRecordings() const {
-  return has_any_recordings_;
-}
-
-gfx::Rect PicturePileImpl::RecordedViewport() const {
-  return recorded_viewport_;
-}
-
-gfx::Rect PicturePileImpl::PaddedRect(const PictureMapKey& key) const {
-  gfx::Rect padded_rect = tiling_.TileBounds(key.first, key.second);
-  padded_rect.Inset(-buffer_pixels(), -buffer_pixels(), -buffer_pixels(),
-                    -buffer_pixels());
-  return padded_rect;
-}
-
-bool PicturePileImpl::CanRasterSlowTileCheck(
-    const gfx::Rect& layer_rect) const {
-  bool include_borders = false;
-  for (TilingData::Iterator tile_iter(&tiling_, layer_rect, include_borders);
-       tile_iter; ++tile_iter) {
-    PictureMap::const_iterator map_iter = picture_map_.find(tile_iter.index());
-    if (map_iter == picture_map_.end())
-      return false;
-  }
-  return true;
-}
-
-void PicturePileImpl::SetShouldAttemptToUseDistanceFieldText() {
-  should_attempt_to_use_distance_field_text_ = true;
-}
-
-bool PicturePileImpl::ShouldAttemptToUseDistanceFieldText() const {
-  return should_attempt_to_use_distance_field_text_;
-}
-
-void PicturePileImpl::AsValueInto(
-    base::trace_event::TracedValue* pictures) const {
-  gfx::Rect tiling_rect(tiling_.tiling_size());
-  std::set<const void*> appended_pictures;
-  bool include_borders = true;
-  for (TilingData::Iterator tile_iter(&tiling_, tiling_rect, include_borders);
-       tile_iter; ++tile_iter) {
-    PictureMap::const_iterator map_iter = picture_map_.find(tile_iter.index());
-    if (map_iter == picture_map_.end())
-      continue;
-
-    const Picture* picture = map_iter->second.get();
-    if (appended_pictures.count(picture) == 0) {
-      appended_pictures.insert(picture);
-      TracedValue::AppendIDRef(picture, pictures);
-    }
-  }
-}
-
-bool PicturePileImpl::CanUseLCDText() const {
-  return can_use_lcd_text_;
-}
-
-scoped_refptr<RasterSource> PicturePileImpl::CreateCloneWithoutLCDText() const {
-  DCHECK(CanUseLCDText());
-  bool can_use_lcd_text = false;
-  return scoped_refptr<RasterSource>(
-      new PicturePileImpl(this, can_use_lcd_text));
-}
-
-PicturePileImpl::ImageIterator::ImageIterator(
-    const gfx::Rect& layer_rect,
-    const PicturePileImpl* picture_pile)
-    : picture_pile_(picture_pile),
-      layer_rect_(layer_rect),
-      tile_iterator_(&picture_pile_->tiling_,
-                     layer_rect_,
-                     false /* include_borders */) {
-  // Early out if there isn't a single tile.
-  if (!tile_iterator_)
-    return;
-
-  AdvanceToTilePictureWithImages();
-}
-
-PicturePileImpl::ImageIterator::~ImageIterator() {}
-
-PicturePileImpl::ImageIterator& PicturePileImpl::ImageIterator::operator++() {
-  ++image_iterator_;
-  if (image_iterator_)
-    return *this;
-
-  ++tile_iterator_;
-  AdvanceToTilePictureWithImages();
-  return *this;
-}
-
-void PicturePileImpl::ImageIterator::AdvanceToTilePictureWithImages() {
-  for (; tile_iterator_; ++tile_iterator_) {
-    PictureMap::const_iterator it =
-        picture_pile_->picture_map_.find(tile_iterator_.index());
-    if (it == picture_pile_->picture_map_.end())
-      continue;
-
-    const Picture* picture = it->second.get();
-    if ((processed_pictures_.count(picture) != 0) ||
-        !picture->WillPlayBackBitmaps())
-      continue;
-
-    processed_pictures_.insert(picture);
-    image_iterator_ = picture->GetDiscardableImageMapIterator(layer_rect_);
-    if (image_iterator_)
-      break;
-  }
-}
-
-void PicturePileImpl::DidBeginTracing() {
-  std::set<const void*> processed_pictures;
-  for (const auto& map_pair : picture_map_) {
-    const Picture* picture = map_pair.second.get();
-    if (processed_pictures.count(picture) == 0) {
-      picture->EmitTraceSnapshot();
-      processed_pictures.insert(picture);
-    }
-  }
-}
-
-}  // namespace cc