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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_EXTERNAL_FRAMEBUFFER_H_
#define GPU_COMMAND_BUFFER_SERVICE_GLES2_EXTERNAL_FRAMEBUFFER_H_
#include <memory>
#include "base/containers/flat_map.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/command_buffer/service/shared_image/shared_image_representation.h"
#include "gpu/gpu_gles2_export.h"
#include "ui/gl/gl_bindings.h"
namespace gpu {
class SharedImageRepresentationFactory;
}
namespace gpu::gles2 {
class FeatureInfo;
// Encapsulates FrameBuffer Object and corresponding attachments for use as
// default framebuffer from command decoders. Only user of default emulated
// framebuffer is NaCL and hopefully will be deleted at some point.
class GPU_GLES2_EXPORT GLES2ExternalFramebuffer {
public:
GLES2ExternalFramebuffer(
bool passthrough,
const FeatureInfo& feature_info,
SharedImageRepresentationFactory* shared_image_representation_factory);
~GLES2ExternalFramebuffer();
// Attaches new SharedImage (if mailbox is not zero) to the framebuffer and
// resolves and detaches previously attached image if any.
bool AttachSharedImage(const Mailbox& mailbox,
int samples_count,
bool preserve,
bool need_depth,
bool need_stencil);
// If the framebuffer is multisampled, resolves the framebuffer into current
// SharedImage. If we preserve contents, blits preserved buffer to the shared
// image. Detaches shared image from the framebuffer.
void ResolveAndDetach();
GLuint GetFramebufferId() const;
bool IsSharedImageAttached() const;
void Destroy(bool have_context);
// Validating command decoder needs these for validation.
gfx::Size GetSize() const;
GLenum GetColorFormat() const;
GLenum GetDepthFormat() const;
GLenum GetStencilFormat() const;
int GetSamplesCount() const;
bool HasAlpha() const;
bool HasDepth() const;
bool HasStencil() const;
private:
class Attachment;
bool UpdateAttachment(GLenum attachment,
const gfx::Size& size,
int samples,
GLenum format);
std::unique_ptr<Attachment> CreateAttachment(GLenum attachment,
const gfx::Size& size,
int samples,
GLenum format);
// Caps
const bool passthrough_;
GLint max_sample_count_ = 0;
bool packed_depth_stencil_ = false;
bool supports_separate_fbo_bindings_ = false;
bool supports_window_rectangles_ = false;
// Main frame buffer
GLuint fbo_ = 0;
base::flat_map<GLenum, std::unique_ptr<Attachment>> attachments_;
const raw_ptr<SharedImageRepresentationFactory>
shared_image_representation_factory_;
std::unique_ptr<GLTextureImageRepresentationBase>
shared_image_representation_;
std::unique_ptr<GLTextureImageRepresentationBase::ScopedAccess>
scoped_access_;
};
} // namespace gpu::gles2
#endif // GPU_COMMAND_BUFFER_SERVICE_GLES2_EXTERNAL_FRAMEBUFFER_H_
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