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// Copyright 2015 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_TRANSFORM_FEEDBACK_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_TRANSFORM_FEEDBACK_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/modules/webgl/webgl_context_object.h"
#include "third_party/blink/renderer/modules/webgl/webgl_program.h"
namespace blink {
class WebGL2RenderingContextBase;
class WebGLBuffer;
class WebGLTransformFeedback : public WebGLContextObject {
DEFINE_WRAPPERTYPEINFO();
public:
enum TFType {
TFTypeDefault,
TFTypeUser,
};
explicit WebGLTransformFeedback(WebGL2RenderingContextBase*, TFType);
~WebGLTransformFeedback() override;
GLuint Object() const { return object_; }
static WebGLTransformFeedback* Create(WebGL2RenderingContextBase*, TFType);
bool IsDefaultObject() const { return type_ == TFTypeDefault; }
GLenum GetTarget() const { return target_; }
void SetTarget(GLenum);
bool HasEverBeenBound() const { return object_ && target_; }
WebGLProgram* GetProgram() const { return program_; }
void SetProgram(WebGLProgram*);
// These are the indexed bind points for transform feedback buffers.
// Returns false if index is out of range and the caller should
// synthesize a GL error.
bool SetBoundIndexedTransformFeedbackBuffer(GLuint index, WebGLBuffer*);
bool GetBoundIndexedTransformFeedbackBuffer(GLuint index,
WebGLBuffer** outBuffer) const;
bool HasEnoughBuffers(GLuint num_required) const;
bool UsesBuffer(WebGLBuffer*);
void UnbindBuffer(WebGLBuffer*);
void Trace(blink::Visitor*) override;
bool active() const { return active_; }
bool paused() const { return paused_; }
const HeapVector<TraceWrapperMember<WebGLBuffer>>&
bound_indexed_transform_feedback_buffers() const {
return bound_indexed_transform_feedback_buffers_;
}
void SetActive(bool active) {
active_ = active;
DCHECK(active_ || !paused_);
}
void SetPaused(bool paused) {
paused_ = paused;
DCHECK(active_ || !paused_);
}
bool ValidateProgramForResume(WebGLProgram*) const;
private:
void DispatchDetached(gpu::gles2::GLES2Interface*);
bool HasObject() const override { return object_ != 0; }
void DeleteObjectImpl(gpu::gles2::GLES2Interface*) override;
GLuint object_;
TFType type_;
GLenum target_;
HeapVector<TraceWrapperMember<WebGLBuffer>>
bound_indexed_transform_feedback_buffers_;
Member<WebGLProgram> program_;
unsigned program_link_count_;
bool active_;
bool paused_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_TRANSFORM_FEEDBACK_H_
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