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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/graphics/gpu_memory_buffer_image_copy.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
#include "gpu/command_buffer/client/shared_image_interface.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_graphics_context_3d_provider.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types_3d.h"
#include "third_party/blink/renderer/platform/graphics/image.h"
#include "third_party/blink/renderer/platform/graphics/static_bitmap_image.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
namespace blink {
GpuMemoryBufferImageCopy::GpuMemoryBufferImageCopy(
gpu::gles2::GLES2Interface* gl,
gpu::SharedImageInterface* sii)
: gl_(gl), sii_(sii) {}
GpuMemoryBufferImageCopy::~GpuMemoryBufferImageCopy() {
CleanupDestImage();
}
bool GpuMemoryBufferImageCopy::EnsureDestImage(const gfx::Size& size) {
// Create a new memorybuffer if the size has changed, or we don't have one.
if (dest_image_size_ != size || !gpu_memory_buffer_) {
// Cleanup old copy image before allocating a new one.
CleanupDestImage();
gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager =
Platform::Current()->GetGpuMemoryBufferManager();
if (!gpu_memory_buffer_manager)
return false;
gpu_memory_buffer_ = gpu_memory_buffer_manager->CreateGpuMemoryBuffer(
size, gfx::BufferFormat::RGBA_8888, gfx::BufferUsage::SCANOUT,
gpu::kNullSurfaceHandle, nullptr);
if (!gpu_memory_buffer_)
return false;
dest_image_size_ = size;
dest_mailbox_ = sii_->CreateSharedImage(
gpu_memory_buffer_.get(), gpu_memory_buffer_manager, gfx::ColorSpace(),
kTopLeft_GrSurfaceOrigin, kPremul_SkAlphaType,
gpu::SHARED_IMAGE_USAGE_GLES2);
gl_->WaitSyncTokenCHROMIUM(sii_->GenUnverifiedSyncToken().GetConstData());
}
return true;
}
std::pair<gfx::GpuMemoryBuffer*, gpu::SyncToken>
GpuMemoryBufferImageCopy::CopyImage(Image* image) {
if (!image)
return {};
TRACE_EVENT0("gpu", "GpuMemoryBufferImageCopy::CopyImage");
gfx::Size size = image->Size();
if (!EnsureDestImage(size))
return {};
// Bind the write framebuffer to copy image.
GLuint dest_texture_id =
gl_->CreateAndTexStorage2DSharedImageCHROMIUM(dest_mailbox_.name);
gl_->BeginSharedImageAccessDirectCHROMIUM(
dest_texture_id, GL_SHARED_IMAGE_ACCESS_MODE_READWRITE_CHROMIUM);
GLenum target = GL_TEXTURE_2D;
{
gl_->BindTexture(target, dest_texture_id);
gl_->TexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
gl_->TexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
gl_->TexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl_->TexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
gl_->BindTexture(GL_TEXTURE_2D, 0);
// Bind the read framebuffer to our image.
StaticBitmapImage* static_image = static_cast<StaticBitmapImage*>(image);
auto source_mailbox_holder = static_image->GetMailboxHolder();
DCHECK(source_mailbox_holder.mailbox.IsSharedImage());
// Not strictly necessary since we are on the same context, but keeping
// for cleanliness and in case we ever move off the same context.
gl_->WaitSyncTokenCHROMIUM(source_mailbox_holder.sync_token.GetData());
GLuint source_texture_id = gl_->CreateAndTexStorage2DSharedImageCHROMIUM(
source_mailbox_holder.mailbox.name);
gl_->BeginSharedImageAccessDirectCHROMIUM(
source_texture_id, GL_SHARED_IMAGE_ACCESS_MODE_READ_CHROMIUM);
gl_->CopySubTextureCHROMIUM(source_texture_id, 0, GL_TEXTURE_2D,
dest_texture_id, 0, 0, 0, 0, 0, size.width(),
size.height(), false, false, false);
// Cleanup the read framebuffer and texture.
gl_->EndSharedImageAccessDirectCHROMIUM(source_texture_id);
gl_->DeleteTextures(1, &source_texture_id);
// Cleanup the draw framebuffer and texture.
gl_->EndSharedImageAccessDirectCHROMIUM(dest_texture_id);
gl_->DeleteTextures(1, &dest_texture_id);
gpu::SyncToken sync_token;
gl_->GenSyncTokenCHROMIUM(sync_token.GetData());
static_image->UpdateSyncToken(sync_token);
return std::make_pair(gpu_memory_buffer_.get(), sync_token);
}
void GpuMemoryBufferImageCopy::CleanupDestImage() {
gpu_memory_buffer_.reset();
if (dest_mailbox_.IsZero())
return;
gpu::SyncToken sync_token;
gl_->GenUnverifiedSyncTokenCHROMIUM(sync_token.GetData());
sii_->DestroySharedImage(sync_token, dest_mailbox_);
dest_mailbox_.SetZero();
}
} // namespace blink
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