cc: Rename DisplayListRasterSource to just RasterSource.

cc/playback/display_list_raster_source.cc

-// Copyright 2014 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/playback/display_list_raster_source.h"
-
-#include <stddef.h>
-
-#include "base/strings/stringprintf.h"
-#include "base/thread_task_runner_handle.h"
-#include "base/trace_event/memory_dump_manager.h"
-#include "base/trace_event/trace_event.h"
-#include "cc/base/region.h"
-#include "cc/debug/debug_colors.h"
-#include "cc/playback/display_item_list.h"
-#include "cc/playback/image_hijack_canvas.h"
-#include "cc/playback/skip_image_canvas.h"
-#include "skia/ext/analysis_canvas.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkPictureRecorder.h"
-#include "third_party/skia/include/core/SkTLazy.h"
-#include "ui/gfx/geometry/rect_conversions.h"
-
-namespace cc {
-
-scoped_refptr<DisplayListRasterSource>
-DisplayListRasterSource::CreateFromDisplayListRecordingSource(
-    const DisplayListRecordingSource* other,
-    bool can_use_lcd_text) {
-  return make_scoped_refptr(
-      new DisplayListRasterSource(other, can_use_lcd_text));
-}
-
-DisplayListRasterSource::DisplayListRasterSource(
-    const DisplayListRecordingSource* other,
-    bool can_use_lcd_text)
-    : display_list_(other->display_list_),
-      painter_reported_memory_usage_(other->painter_reported_memory_usage_),
-      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_),
-      size_(other->size_),
-      clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
-      slow_down_raster_scale_factor_for_debug_(
-          other->slow_down_raster_scale_factor_for_debug_),
-      should_attempt_to_use_distance_field_text_(false),
-      image_decode_controller_(nullptr) {
-  // In certain cases, ThreadTaskRunnerHandle isn't set (Android Webview).
-  // Don't register a dump provider in these cases.
-  // TODO(ericrk): Get this working in Android Webview. crbug.com/517156
-  if (base::ThreadTaskRunnerHandle::IsSet()) {
-    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
-        this, "cc::DisplayListRasterSource",
-        base::ThreadTaskRunnerHandle::Get());
-  }
-}
-
-DisplayListRasterSource::DisplayListRasterSource(
-    const DisplayListRasterSource* other,
-    bool can_use_lcd_text)
-    : display_list_(other->display_list_),
-      painter_reported_memory_usage_(other->painter_reported_memory_usage_),
-      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_),
-      size_(other->size_),
-      clear_canvas_with_debug_color_(other->clear_canvas_with_debug_color_),
-      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_),
-      image_decode_controller_(other->image_decode_controller_) {
-  // In certain cases, ThreadTaskRunnerHandle isn't set (Android Webview).
-  // Don't register a dump provider in these cases.
-  // TODO(ericrk): Get this working in Android Webview. crbug.com/517156
-  if (base::ThreadTaskRunnerHandle::IsSet()) {
-    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
-        this, "cc::DisplayListRasterSource",
-        base::ThreadTaskRunnerHandle::Get());
-  }
-}
-
-DisplayListRasterSource::~DisplayListRasterSource() {
-  // For MemoryDumpProvider deregistration to work correctly, this must happen
-  // on the same thread that the DisplayListRasterSource was created on.
-  DCHECK(memory_dump_thread_checker_.CalledOnValidThread());
-  base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
-      this);
-}
-
-void DisplayListRasterSource::PlaybackToSharedCanvas(
-    SkCanvas* raster_canvas,
-    const gfx::Rect& canvas_rect,
-    float contents_scale,
-    bool include_images) const {
-  // TODO(vmpstr): This can be improved by plumbing whether the tile itself has
-  // discardable images. This way we would only pay for the hijack canvas if the
-  // tile actually needed it.
-  if (!include_images) {
-    SkipImageCanvas canvas(raster_canvas);
-    RasterCommon(&canvas, nullptr, canvas_rect, canvas_rect, contents_scale);
-  } else if (display_list_->MayHaveDiscardableImages()) {
-    const SkImageInfo& info = raster_canvas->imageInfo();
-    ImageHijackCanvas canvas(info.width(), info.height(),
-                             image_decode_controller_);
-    canvas.addCanvas(raster_canvas);
-
-    RasterCommon(&canvas, nullptr, canvas_rect, canvas_rect, contents_scale);
-  } else {
-    RasterCommon(raster_canvas, nullptr, canvas_rect, canvas_rect,
-                 contents_scale);
-  }
-}
-
-void DisplayListRasterSource::RasterForAnalysis(skia::AnalysisCanvas* canvas,
-                                                const gfx::Rect& canvas_rect,
-                                                float contents_scale) const {
-  RasterCommon(canvas, canvas, canvas_rect, canvas_rect, contents_scale);
-}
-
-void DisplayListRasterSource::PlaybackToCanvas(
-    SkCanvas* raster_canvas,
-    const gfx::Rect& canvas_bitmap_rect,
-    const gfx::Rect& canvas_playback_rect,
-    float contents_scale,
-    bool include_images) const {
-  PrepareForPlaybackToCanvas(raster_canvas, canvas_bitmap_rect,
-                             canvas_playback_rect, contents_scale);
-
-  if (!include_images) {
-    SkipImageCanvas canvas(raster_canvas);
-    RasterCommon(&canvas, nullptr, canvas_bitmap_rect, canvas_playback_rect,
-                 contents_scale);
-  } else if (display_list_->MayHaveDiscardableImages()) {
-    const SkImageInfo& info = raster_canvas->imageInfo();
-    ImageHijackCanvas canvas(info.width(), info.height(),
-                             image_decode_controller_);
-    canvas.addCanvas(raster_canvas);
-    RasterCommon(&canvas, nullptr, canvas_bitmap_rect, canvas_playback_rect,
-                 contents_scale);
-  } else {
-    RasterCommon(raster_canvas, nullptr, canvas_bitmap_rect,
-                 canvas_playback_rect, contents_scale);
-  }
-}
-
-void DisplayListRasterSource::PrepareForPlaybackToCanvas(
-    SkCanvas* canvas,
-    const gfx::Rect& canvas_bitmap_rect,
-    const gfx::Rect& canvas_playback_rect,
-    float contents_scale) const {
-  // TODO(hendrikw): See if we can split this up into separate functions.
-  bool partial_update = canvas_bitmap_rect != canvas_playback_rect;
-
-  if (!partial_update)
-    canvas->discard();
-  if (clear_canvas_with_debug_color_) {
-    // Any non-painted areas in the content bounds will be left in this color.
-    if (!partial_update) {
-      canvas->clear(DebugColors::NonPaintedFillColor());
-    } else {
-      canvas->save();
-      canvas->clipRect(gfx::RectToSkRect(
-          canvas_playback_rect - canvas_bitmap_rect.OffsetFromOrigin()));
-      canvas->drawColor(DebugColors::NonPaintedFillColor());
-      canvas->restore();
-    }
-  }
-
-  // If this raster source has opaque contents, it is guaranteeing that it will
-  // draw an opaque rect the size of the layer.  If it is not, then we must
-  // clear this canvas ourselves.
-  if (requires_clear_) {
-    TRACE_EVENT_INSTANT0("cc", "SkCanvas::clear", TRACE_EVENT_SCOPE_THREAD);
-    // Clearing is about ~4x faster than drawing a rect even if the content
-    // isn't covering a majority of the canvas.
-    if (!partial_update) {
-      canvas->clear(SK_ColorTRANSPARENT);
-    } else {
-      canvas->save();
-      canvas->clipRect(gfx::RectToSkRect(
-          canvas_playback_rect - canvas_bitmap_rect.OffsetFromOrigin()));
-      canvas->drawColor(SK_ColorTRANSPARENT, SkXfermode::kClear_Mode);
-      canvas->restore();
-    }
-  } else {
-    // Even if completely covered, for rasterizations that touch the edge of the
-    // layer, we also need to raster the background color underneath the last
-    // texel (since the recording won't cover it) and outside the last texel
-    // (due to linear filtering when using this texture).
-    gfx::Rect content_rect =
-        gfx::ScaleToEnclosingRect(gfx::Rect(size_), contents_scale);
-
-    // The final texel of content may only be partially covered by a
-    // rasterization; this rect represents the content rect that is fully
-    // covered by content.
-    gfx::Rect deflated_content_rect = content_rect;
-    deflated_content_rect.Inset(0, 0, 1, 1);
-    deflated_content_rect.Intersect(canvas_playback_rect);
-    if (!deflated_content_rect.Contains(canvas_playback_rect)) {
-      if (clear_canvas_with_debug_color_) {
-        // Any non-painted areas outside of the content bounds are left in
-        // this color.  If this is seen then it means that cc neglected to
-        // rerasterize a tile that used to intersect with the content rect
-        // after the content bounds grew.
-        canvas->save();
-        canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
-        canvas->clipRect(gfx::RectToSkRect(content_rect),
-                         SkRegion::kDifference_Op);
-        canvas->drawColor(DebugColors::MissingResizeInvalidations(),
-                          SkXfermode::kSrc_Mode);
-        canvas->restore();
-      }
-
-      // Drawing at most 2 x 2 x (canvas width + canvas height) texels is 2-3X
-      // faster than clearing, so special case this.
-      canvas->save();
-      canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
-      gfx::Rect inflated_content_rect = content_rect;
-      // Only clear edges that will be inside the canvas_playback_rect, else we
-      // clear things that are still valid from a previous raster.
-      inflated_content_rect.Inset(0, 0, -1, -1);
-      inflated_content_rect.Intersect(canvas_playback_rect);
-      canvas->clipRect(gfx::RectToSkRect(inflated_content_rect),
-                       SkRegion::kReplace_Op);
-      canvas->clipRect(gfx::RectToSkRect(deflated_content_rect),
-                       SkRegion::kDifference_Op);
-      canvas->drawColor(background_color_, SkXfermode::kSrc_Mode);
-      canvas->restore();
-    }
-  }
-}
-
-void DisplayListRasterSource::RasterCommon(
-    SkCanvas* canvas,
-    SkPicture::AbortCallback* callback,
-    const gfx::Rect& canvas_bitmap_rect,
-    const gfx::Rect& canvas_playback_rect,
-    float contents_scale) const {
-  canvas->translate(-canvas_bitmap_rect.x(), -canvas_bitmap_rect.y());
-  gfx::Rect content_rect =
-      gfx::ScaleToEnclosingRect(gfx::Rect(size_), contents_scale);
-  content_rect.Intersect(canvas_playback_rect);
-
-  canvas->clipRect(gfx::RectToSkRect(content_rect), SkRegion::kIntersect_Op);
-
-  DCHECK(display_list_.get());
-  gfx::Rect canvas_target_playback_rect =
-      canvas_playback_rect - canvas_bitmap_rect.OffsetFromOrigin();
-  int repeat_count = std::max(1, slow_down_raster_scale_factor_for_debug_);
-  for (int i = 0; i < repeat_count; ++i) {
-    display_list_->Raster(canvas, callback, canvas_target_playback_rect,
-                          contents_scale);
-  }
-}
-
-sk_sp<SkPicture> DisplayListRasterSource::GetFlattenedPicture() {
-  TRACE_EVENT0("cc", "DisplayListRasterSource::GetFlattenedPicture");
-
-  gfx::Rect display_list_rect(size_);
-  SkPictureRecorder recorder;
-  SkCanvas* canvas = recorder.beginRecording(display_list_rect.width(),
-                                             display_list_rect.height());
-  if (!display_list_rect.IsEmpty()) {
-    PrepareForPlaybackToCanvas(canvas, display_list_rect, display_list_rect,
-                               1.f);
-    RasterCommon(canvas, nullptr, display_list_rect, display_list_rect, 1.f);
-  }
-
-  return recorder.finishRecordingAsPicture();
-}
-
-size_t DisplayListRasterSource::GetPictureMemoryUsage() const {
-  if (!display_list_)
-    return 0;
-  return display_list_->ApproximateMemoryUsage() +
-         painter_reported_memory_usage_;
-}
-
-bool DisplayListRasterSource::PerformSolidColorAnalysis(
-    const gfx::Rect& content_rect,
-    float contents_scale,
-    SkColor* color) const {
-  TRACE_EVENT0("cc", "DisplayListRasterSource::PerformSolidColorAnalysis");
-
-  gfx::Rect layer_rect =
-      gfx::ScaleToEnclosingRect(content_rect, 1.0f / contents_scale);
-
-  layer_rect.Intersect(gfx::Rect(size_));
-  skia::AnalysisCanvas canvas(layer_rect.width(), layer_rect.height());
-  RasterForAnalysis(&canvas, layer_rect, 1.0f);
-  return canvas.GetColorIfSolid(color);
-}
-
-void DisplayListRasterSource::GetDiscardableImagesInRect(
-    const gfx::Rect& layer_rect,
-    float raster_scale,
-    std::vector<DrawImage>* images) const {
-  DCHECK_EQ(0u, images->size());
-  display_list_->GetDiscardableImagesInRect(layer_rect, raster_scale, images);
-}
-
-bool DisplayListRasterSource::CoversRect(const gfx::Rect& layer_rect) const {
-  if (size_.IsEmpty())
-    return false;
-  gfx::Rect bounded_rect = layer_rect;
-  bounded_rect.Intersect(gfx::Rect(size_));
-  return recorded_viewport_.Contains(bounded_rect);
-}
-
-gfx::Size DisplayListRasterSource::GetSize() const {
-  return size_;
-}
-
-bool DisplayListRasterSource::IsSolidColor() const {
-  return is_solid_color_;
-}
-
-SkColor DisplayListRasterSource::GetSolidColor() const {
-  DCHECK(IsSolidColor());
-  return solid_color_;
-}
-
-bool DisplayListRasterSource::HasRecordings() const {
-  return !!display_list_.get();
-}
-
-gfx::Rect DisplayListRasterSource::RecordedViewport() const {
-  return recorded_viewport_;
-}
-
-void DisplayListRasterSource::SetShouldAttemptToUseDistanceFieldText() {
-  should_attempt_to_use_distance_field_text_ = true;
-}
-
-bool DisplayListRasterSource::ShouldAttemptToUseDistanceFieldText() const {
-  return should_attempt_to_use_distance_field_text_;
-}
-
-void DisplayListRasterSource::AsValueInto(
-    base::trace_event::TracedValue* array) const {
-  if (display_list_.get())
-    TracedValue::AppendIDRef(display_list_.get(), array);
-}
-
-void DisplayListRasterSource::DidBeginTracing() {
-  if (display_list_.get())
-    display_list_->EmitTraceSnapshot();
-}
-
-bool DisplayListRasterSource::CanUseLCDText() const {
-  return can_use_lcd_text_;
-}
-
-scoped_refptr<DisplayListRasterSource>
-DisplayListRasterSource::CreateCloneWithoutLCDText() const {
-  bool can_use_lcd_text = false;
-  return scoped_refptr<DisplayListRasterSource>(
-      new DisplayListRasterSource(this, can_use_lcd_text));
-}
-
-void DisplayListRasterSource::SetImageDecodeController(
-    ImageDecodeController* image_decode_controller) {
-  DCHECK(image_decode_controller);
-  image_decode_controller_ = image_decode_controller;
-}
-
-bool DisplayListRasterSource::OnMemoryDump(
-    const base::trace_event::MemoryDumpArgs& args,
-    base::trace_event::ProcessMemoryDump* pmd) {
-  DCHECK(memory_dump_thread_checker_.CalledOnValidThread());
-
-  uint64_t memory_usage = GetPictureMemoryUsage();
-  if (memory_usage > 0) {
-    std::string dump_name = base::StringPrintf(
-        "cc/display_lists/display_list_raster_source_%p", this);
-    base::trace_event::MemoryAllocatorDump* dump =
-        pmd->CreateAllocatorDump(dump_name);
-    dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
-                    base::trace_event::MemoryAllocatorDump::kUnitsBytes,
-                    memory_usage);
-  }
-  return true;
-}
-
-}  // namespace cc