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// 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/raster/tile_task_worker_pool.h"
#include <stddef.h>
#include "base/trace_event/trace_event.h"
#include "cc/playback/display_list_raster_source.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/utils/SkPaintFilterCanvas.h"
namespace cc {
TileTaskWorkerPool::TileTaskWorkerPool() {}
TileTaskWorkerPool::~TileTaskWorkerPool() {}
// static
void TileTaskWorkerPool::ScheduleTasksOnOriginThread(TileTaskClient* client,
TaskGraph* graph) {
TRACE_EVENT0("cc", "TileTaskWorkerPool::ScheduleTasksOnOriginThread");
for (TaskGraph::Node::Vector::iterator it = graph->nodes.begin();
it != graph->nodes.end(); ++it) {
TaskGraph::Node& node = *it;
TileTask* task = static_cast<TileTask*>(node.task);
if (!task->HasBeenScheduled()) {
task->WillSchedule();
task->ScheduleOnOriginThread(client);
task->DidSchedule();
}
}
}
namespace {
bool IsSupportedPlaybackToMemoryFormat(ResourceFormat format) {
switch (format) {
case RGBA_4444:
case RGBA_8888:
case BGRA_8888:
return true;
case ALPHA_8:
case LUMINANCE_8:
case RGB_565:
case ETC1:
case RED_8:
return false;
}
NOTREACHED();
return false;
}
class SkipImageCanvas : public SkPaintFilterCanvas {
public:
explicit SkipImageCanvas(SkCanvas* canvas) : SkPaintFilterCanvas(canvas) {}
bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type type) const override {
if (type == kBitmap_Type)
return false;
SkShader* shader = (*paint) ? (*paint)->getShader() : nullptr;
return !shader || !shader->isABitmap();
}
void onDrawPicture(const SkPicture* picture,
const SkMatrix* matrix,
const SkPaint* paint) override {
SkTCopyOnFirstWrite<SkPaint> filteredPaint(paint);
// To filter nested draws, we must unfurl pictures at this stage.
if (onFilter(&filteredPaint, kPicture_Type))
SkCanvas::onDrawPicture(picture, matrix, filteredPaint);
}
};
class AutoSkipImageCanvas {
public:
AutoSkipImageCanvas(SkCanvas* canvas, bool include_images) : canvas_(canvas) {
if (!include_images) {
skip_image_canvas_ = skia::AdoptRef(new SkipImageCanvas(canvas));
canvas_ = skip_image_canvas_.get();
}
}
operator SkCanvas*() { return canvas_; }
private:
skia::RefPtr<SkCanvas> skip_image_canvas_;
SkCanvas* canvas_;
};
} // anonymous namespace
// static
void TileTaskWorkerPool::PlaybackToMemory(
void* memory,
ResourceFormat format,
const gfx::Size& size,
size_t stride,
const DisplayListRasterSource* raster_source,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float scale,
bool include_images) {
TRACE_EVENT0("cc", "TileTaskWorkerPool::PlaybackToMemory");
DCHECK(IsSupportedPlaybackToMemoryFormat(format)) << format;
// Uses kPremul_SkAlphaType since the result is not known to be opaque.
SkImageInfo info =
SkImageInfo::MakeN32(size.width(), size.height(), kPremul_SkAlphaType);
SkColorType buffer_color_type = ResourceFormatToSkColorType(format);
bool needs_copy = buffer_color_type != info.colorType();
// Use unknown pixel geometry to disable LCD text.
SkSurfaceProps surface_props(0, kUnknown_SkPixelGeometry);
if (raster_source->CanUseLCDText()) {
// LegacyFontHost will get LCD text and skia figures out what type to use.
surface_props = SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType);
}
if (!stride)
stride = info.minRowBytes();
DCHECK_GT(stride, 0u);
if (!needs_copy) {
skia::RefPtr<SkSurface> surface = skia::AdoptRef(
SkSurface::NewRasterDirect(info, memory, stride, &surface_props));
AutoSkipImageCanvas canvas(surface->getCanvas(), include_images);
raster_source->PlaybackToCanvas(canvas, canvas_bitmap_rect,
canvas_playback_rect, scale);
return;
}
skia::RefPtr<SkSurface> surface =
skia::AdoptRef(SkSurface::NewRaster(info, &surface_props));
AutoSkipImageCanvas canvas(surface->getCanvas(), include_images);
// TODO(reveman): Improve partial raster support by reducing the size of
// playback rect passed to PlaybackToCanvas. crbug.com/519070
raster_source->PlaybackToCanvas(canvas, canvas_bitmap_rect,
canvas_bitmap_rect, scale);
{
TRACE_EVENT0("cc", "TileTaskWorkerPool::PlaybackToMemory::ConvertPixels");
SkImageInfo dst_info =
SkImageInfo::Make(info.width(), info.height(), buffer_color_type,
info.alphaType(), info.profileType());
bool rv = surface->getCanvas()->readPixels(dst_info, memory, stride, 0, 0);
DCHECK(rv);
}
}
} // namespace cc
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