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// 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/raster/bitmap_raster_buffer_provider.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include "base/macros.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/process_memory_dump.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_argument.h"
#include "cc/raster/raster_source.h"
#include "cc/trees/layer_tree_frame_sink.h"
#include "components/viz/common/resources/bitmap_allocation.h"
#include "components/viz/common/resources/platform_color.h"
namespace cc {
namespace {
class BitmapSoftwareBacking : public ResourcePool::SoftwareBacking {
public:
~BitmapSoftwareBacking() override {
frame_sink->DidDeleteSharedBitmap(shared_bitmap_id);
}
void OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
uint64_t tracing_process_id,
int importance) const override {
pmd->CreateSharedMemoryOwnershipEdge(
buffer_dump_guid, shared_memory->mapped_id(), importance);
}
LayerTreeFrameSink* frame_sink;
std::unique_ptr<base::SharedMemory> shared_memory;
};
class BitmapRasterBufferImpl : public RasterBuffer {
public:
BitmapRasterBufferImpl(const gfx::Size& size,
const gfx::ColorSpace& color_space,
void* pixels,
uint64_t resource_content_id,
uint64_t previous_content_id)
: resource_size_(size),
color_space_(color_space),
pixels_(pixels),
resource_has_previous_content_(
resource_content_id && resource_content_id == previous_content_id) {
}
// Overridden from RasterBuffer:
void Playback(const RasterSource* raster_source,
const gfx::Rect& raster_full_rect,
const gfx::Rect& raster_dirty_rect,
uint64_t new_content_id,
const gfx::AxisTransform2d& transform,
const RasterSource::PlaybackSettings& playback_settings,
const GURL& url) override {
TRACE_EVENT0("cc", "BitmapRasterBuffer::Playback");
gfx::Rect playback_rect = raster_full_rect;
if (resource_has_previous_content_) {
playback_rect.Intersect(raster_dirty_rect);
}
DCHECK(!playback_rect.IsEmpty())
<< "Why are we rastering a tile that's not dirty?";
size_t stride = 0u;
RasterBufferProvider::PlaybackToMemory(
pixels_, viz::RGBA_8888, resource_size_, stride, raster_source,
raster_full_rect, playback_rect, transform, color_space_,
/*gpu_compositing=*/false, playback_settings);
}
private:
const gfx::Size resource_size_;
const gfx::ColorSpace color_space_;
void* const pixels_;
bool resource_has_previous_content_;
DISALLOW_COPY_AND_ASSIGN(BitmapRasterBufferImpl);
};
} // namespace
BitmapRasterBufferProvider::BitmapRasterBufferProvider(
LayerTreeFrameSink* frame_sink)
: frame_sink_(frame_sink) {}
BitmapRasterBufferProvider::~BitmapRasterBufferProvider() = default;
std::unique_ptr<RasterBuffer>
BitmapRasterBufferProvider::AcquireBufferForRaster(
const ResourcePool::InUsePoolResource& resource,
uint64_t resource_content_id,
uint64_t previous_content_id) {
DCHECK_EQ(resource.format(), viz::RGBA_8888);
const gfx::Size& size = resource.size();
const gfx::ColorSpace& color_space = resource.color_space();
if (!resource.software_backing()) {
auto backing = std::make_unique<BitmapSoftwareBacking>();
backing->frame_sink = frame_sink_;
backing->shared_bitmap_id = viz::SharedBitmap::GenerateId();
backing->shared_memory =
viz::bitmap_allocation::AllocateMappedBitmap(size, viz::RGBA_8888);
mojo::ScopedSharedBufferHandle handle =
viz::bitmap_allocation::DuplicateAndCloseMappedBitmap(
backing->shared_memory.get(), size, viz::RGBA_8888);
frame_sink_->DidAllocateSharedBitmap(std::move(handle),
backing->shared_bitmap_id);
resource.set_software_backing(std::move(backing));
}
BitmapSoftwareBacking* backing =
static_cast<BitmapSoftwareBacking*>(resource.software_backing());
return std::make_unique<BitmapRasterBufferImpl>(
size, color_space, backing->shared_memory->memory(), resource_content_id,
previous_content_id);
}
void BitmapRasterBufferProvider::Flush() {}
viz::ResourceFormat BitmapRasterBufferProvider::GetResourceFormat() const {
return viz::RGBA_8888;
}
bool BitmapRasterBufferProvider::IsResourceSwizzleRequired() const {
// This value only used by gpu compositing. Software compositing resources
// are all in the native skia byte ordering, and the display compositor will
// do its drawing in the same order.
return false;
}
bool BitmapRasterBufferProvider::IsResourcePremultiplied() const {
return true;
}
bool BitmapRasterBufferProvider::CanPartialRasterIntoProvidedResource() const {
return true;
}
bool BitmapRasterBufferProvider::IsResourceReadyToDraw(
const ResourcePool::InUsePoolResource& resource) const {
// Bitmap resources are immediately ready to draw.
return true;
}
uint64_t BitmapRasterBufferProvider::SetReadyToDrawCallback(
const std::vector<const ResourcePool::InUsePoolResource*>& resources,
const base::Closure& callback,
uint64_t pending_callback_id) const {
// Bitmap resources are immediately ready to draw.
return 0;
}
void BitmapRasterBufferProvider::Shutdown() {}
} // namespace cc
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