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/*
* Copyright (C) 2009-2021 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 "ContextDestructionObserver.h"
#include "WebGLSharedObject.h"
#include <wtf/HashMap.h>
#include <wtf/HashFunctions.h>
#include <wtf/Lock.h>
#include <wtf/Vector.h>
namespace JSC {
class AbstractSlotVisitor;
}
namespace WTF {
class AbstractLocker;
};
namespace WebCore {
class ScriptExecutionContext;
class WebGLRenderingContextBase;
class WebGLShader;
class WebGLProgram final : public WebGLSharedObject, public ContextDestructionObserver {
public:
static Ref<WebGLProgram> create(WebGLRenderingContextBase&);
virtual ~WebGLProgram();
static HashMap<WebGLProgram*, WebGLRenderingContextBase*>& instances() WTF_REQUIRES_LOCK(instancesLock());
static Lock& instancesLock() WTF_RETURNS_LOCK(s_instancesLock);
void contextDestroyed() final;
unsigned numActiveAttribLocations();
GCGLint getActiveAttribLocation(GCGLuint index);
bool isUsingVertexAttrib0();
bool getLinkStatus();
void setLinkStatus(bool);
unsigned getLinkCount() const { return m_linkCount; }
// This is to be called everytime after the program is successfully linked.
// We don't deal with integer overflow here, assuming in reality a program
// will never be linked so many times.
// Also, we invalidate the cached program info.
void increaseLinkCount();
WebGLShader* getAttachedShader(GCGLenum);
bool attachShader(const AbstractLocker&, WebGLShader*);
bool detachShader(const AbstractLocker&, WebGLShader*);
void setRequiredTransformFeedbackBufferCount(int count)
{
m_requiredTransformFeedbackBufferCountAfterNextLink = count;
}
int requiredTransformFeedbackBufferCount()
{
cacheInfoIfNeeded();
return m_requiredTransformFeedbackBufferCount;
}
void addMembersToOpaqueRoots(const AbstractLocker&, JSC::AbstractSlotVisitor&);
private:
WebGLProgram(WebGLRenderingContextBase&);
void deleteObjectImpl(const AbstractLocker&, GraphicsContextGL*, PlatformGLObject) override;
void cacheActiveAttribLocations(GraphicsContextGL*);
void cacheInfoIfNeeded();
static Lock s_instancesLock;
Vector<GCGLint> m_activeAttribLocations;
GCGLint m_linkStatus { 0 };
// This is used to track whether a WebGLUniformLocation belongs to this program or not.
unsigned m_linkCount { 0 };
RefPtr<WebGLShader> m_vertexShader;
RefPtr<WebGLShader> m_fragmentShader;
bool m_infoValid { true };
int m_requiredTransformFeedbackBufferCountAfterNextLink { 0 };
int m_requiredTransformFeedbackBufferCount { 0 };
};
} // namespace WebCore
#endif