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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/zero_copy_raster_buffer_provider.h"
#include <stdint.h>
#include <algorithm>
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_argument.h"
#include "cc/debug/traced_value.h"
#include "cc/resources/platform_color.h"
#include "cc/resources/resource.h"
#include "ui/gfx/buffer_format_util.h"
#include "ui/gfx/gpu_memory_buffer.h"
namespace cc {
namespace {
class RasterBufferImpl : public RasterBuffer {
public:
RasterBufferImpl(ResourceProvider* resource_provider,
const Resource* resource)
: lock_(resource_provider, resource->id()), resource_(resource) {}
// 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) override {
TRACE_EVENT0("cc", "ZeroCopyRasterBuffer::Playback");
gfx::GpuMemoryBuffer* buffer = lock_.GetGpuMemoryBuffer();
if (!buffer)
return;
DCHECK_EQ(1u, gfx::NumberOfPlanesForBufferFormat(buffer->GetFormat()));
bool rv = buffer->Map();
DCHECK(rv);
DCHECK(buffer->memory(0));
// RasterBufferProvider::PlaybackToMemory only supports unsigned strides.
DCHECK_GE(buffer->stride(0), 0);
// TODO(danakj): Implement partial raster with raster_dirty_rect.
RasterBufferProvider::PlaybackToMemory(
buffer->memory(0), resource_->format(), resource_->size(),
buffer->stride(0), raster_source, raster_full_rect, raster_full_rect,
transform, lock_.color_space_for_raster(), playback_settings);
buffer->Unmap();
}
private:
ResourceProvider::ScopedWriteLockGpuMemoryBuffer lock_;
const Resource* resource_;
DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
};
} // namespace
// static
std::unique_ptr<RasterBufferProvider> ZeroCopyRasterBufferProvider::Create(
ResourceProvider* resource_provider,
ResourceFormat preferred_tile_format) {
return base::WrapUnique<RasterBufferProvider>(
new ZeroCopyRasterBufferProvider(resource_provider,
preferred_tile_format));
}
ZeroCopyRasterBufferProvider::ZeroCopyRasterBufferProvider(
ResourceProvider* resource_provider,
ResourceFormat preferred_tile_format)
: resource_provider_(resource_provider),
preferred_tile_format_(preferred_tile_format) {}
ZeroCopyRasterBufferProvider::~ZeroCopyRasterBufferProvider() {}
std::unique_ptr<RasterBuffer>
ZeroCopyRasterBufferProvider::AcquireBufferForRaster(
const Resource* resource,
uint64_t resource_content_id,
uint64_t previous_content_id) {
return base::WrapUnique<RasterBuffer>(
new RasterBufferImpl(resource_provider_, resource));
}
void ZeroCopyRasterBufferProvider::ReleaseBufferForRaster(
std::unique_ptr<RasterBuffer> buffer) {
// Nothing to do here. RasterBufferImpl destructor cleans up after itself.
}
void ZeroCopyRasterBufferProvider::OrderingBarrier() {
// No need to sync resources as this provider does not use GL context.
}
ResourceFormat ZeroCopyRasterBufferProvider::GetResourceFormat(
bool must_support_alpha) const {
if (resource_provider_->IsTextureFormatSupported(preferred_tile_format_) &&
(DoesResourceFormatSupportAlpha(preferred_tile_format_) ||
!must_support_alpha)) {
return preferred_tile_format_;
}
return resource_provider_->best_texture_format();
}
bool ZeroCopyRasterBufferProvider::IsResourceSwizzleRequired(
bool must_support_alpha) const {
return ResourceFormatRequiresSwizzle(GetResourceFormat(must_support_alpha));
}
bool ZeroCopyRasterBufferProvider::CanPartialRasterIntoProvidedResource()
const {
return false;
}
bool ZeroCopyRasterBufferProvider::IsResourceReadyToDraw(
ResourceId resource_id) const {
// Zero-copy resources are immediately ready to draw.
return true;
}
uint64_t ZeroCopyRasterBufferProvider::SetReadyToDrawCallback(
const ResourceProvider::ResourceIdArray& resource_ids,
const base::Closure& callback,
uint64_t pending_callback_id) const {
// Zero-copy resources are immediately ready to draw.
return 0;
}
void ZeroCopyRasterBufferProvider::Shutdown() {}
} // namespace cc