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/*
* Copyright (C) 2015-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(WEBGL)
#include "GraphicsContextGL.h"
#include "WebGLObject.h"
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
namespace JSC {
class AbstractSlotVisitor;
}
namespace WTF {
class AbstractLocker;
}
namespace WebCore {
class WebGL2RenderingContext;
class WebGLBuffer;
class WebGLProgram;
class WebGLTransformFeedback final : public WebGLObject {
public:
virtual ~WebGLTransformFeedback();
static RefPtr<WebGLTransformFeedback> create(WebGL2RenderingContext&);
bool isActive() const { return m_active; }
bool isPaused() const { return m_paused; }
void setActive(bool active) { m_active = active; }
void setPaused(bool paused) { m_paused = paused; }
// 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.
void setBoundIndexedTransformFeedbackBuffer(const AbstractLocker&, GCGLuint index, WebGLBuffer*);
bool getBoundIndexedTransformFeedbackBuffer(GCGLuint index, WebGLBuffer** outBuffer);
bool hasBoundIndexedTransformFeedbackBuffer(const WebGLBuffer* buffer) { return m_boundIndexedTransformFeedbackBuffers.contains(buffer); }
bool validateProgramForResume(WebGLProgram*) const;
void didBind() { m_hasEverBeenBound = true; }
WebGLProgram* program() const { return m_program.get(); }
void setProgram(const AbstractLocker&, WebGLProgram&);
void unbindBuffer(const AbstractLocker&, WebGLBuffer&);
bool hasEnoughBuffers(GCGLuint numRequired) const;
void addMembersToOpaqueRoots(const AbstractLocker&, JSC::AbstractSlotVisitor&);
bool isUsable() const { return object() && !isDeleted(); }
bool isInitialized() const { return m_hasEverBeenBound; }
private:
WebGLTransformFeedback(WebGL2RenderingContext&, PlatformGLObject);
void deleteObjectImpl(const AbstractLocker&, GraphicsContextGL*, PlatformGLObject) override;
bool m_active { false };
bool m_paused { false };
bool m_hasEverBeenBound { false };
unsigned m_programLinkCount { 0 };
Vector<WebGLBindingPoint<WebGLBuffer, GraphicsContextGL::TRANSFORM_FEEDBACK_BUFFER>> m_boundIndexedTransformFeedbackBuffers;
RefPtr<WebGLProgram> m_program;
};
} // namespace WebCore
#endif // ENABLE(WEBGL)
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