blob: b087399ccee12272a594305e2f699a245ab569d6 [file] [log] [blame]
/*
* Copyright (C) 2009 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 "WebGLContextObject.h"
#include "WebGLSharedObject.h"
#include <wtf/HashMap.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
namespace WebCore {
class WebGLRenderbuffer;
class WebGLTexture;
class WebGLFramebuffer final : public WebGLContextObject {
public:
class WebGLAttachment : public RefCounted<WebGLAttachment> {
public:
virtual ~WebGLAttachment();
#if !USE(ANGLE)
virtual GCGLsizei getWidth() const = 0;
virtual GCGLsizei getHeight() const = 0;
virtual GCGLenum getFormat() const = 0;
#endif
virtual WebGLSharedObject* getObject() const = 0;
virtual bool isSharedObject(WebGLSharedObject*) const = 0;
virtual bool isValid() const = 0;
virtual bool isInitialized() const = 0;
virtual void setInitialized() = 0;
virtual void onDetached(GraphicsContextGLOpenGL*) = 0;
virtual void attach(GraphicsContextGLOpenGL*, GCGLenum attachment) = 0;
virtual void unattach(GraphicsContextGLOpenGL*, GCGLenum attachment) = 0;
protected:
WebGLAttachment();
};
virtual ~WebGLFramebuffer();
static Ref<WebGLFramebuffer> create(WebGLRenderingContextBase&);
void setAttachmentForBoundFramebuffer(GCGLenum target, GCGLenum attachment, GCGLenum texTarget, WebGLTexture*, GCGLint level);
void setAttachmentForBoundFramebuffer(GCGLenum target, GCGLenum attachment, WebGLRenderbuffer*);
// If an object is attached to the currently bound framebuffer, remove it.
void removeAttachmentFromBoundFramebuffer(GCGLenum target, WebGLSharedObject*);
// If a given attachment point for the currently bound framebuffer is not null, remove the attached object.
void removeAttachmentFromBoundFramebuffer(GCGLenum target, GCGLenum attachment);
WebGLSharedObject* getAttachmentObject(GCGLenum) const;
#if !USE(ANGLE)
GCGLenum getColorBufferFormat() const;
GCGLsizei getColorBufferWidth() const;
GCGLsizei getColorBufferHeight() const;
// This should always be called before drawArray, drawElements, clear,
// readPixels, copyTexImage2D, copyTexSubImage2D if this framebuffer is
// currently bound.
// Return false if the framebuffer is incomplete; otherwise initialize
// the buffers if they haven't been initialized and
// needToInitializeAttachments is true.
bool onAccess(GraphicsContextGLOpenGL*, const char** reason);
// Software version of glCheckFramebufferStatus(), except that when
// FRAMEBUFFER_COMPLETE is returned, it is still possible for
// glCheckFramebufferStatus() to return FRAMEBUFFER_UNSUPPORTED,
// depending on hardware implementation.
GCGLenum checkStatus(const char** reason) const;
#endif
bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
void setHasEverBeenBound() { m_hasEverBeenBound = true; }
bool hasStencilBuffer() const;
// Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
void drawBuffers(const Vector<GCGLenum>& bufs);
GCGLenum getDrawBuffer(GCGLenum);
private:
WebGLFramebuffer(WebGLRenderingContextBase&);
void deleteObjectImpl(GraphicsContextGLOpenGL*, PlatformGLObject) override;
WebGLAttachment* getAttachment(GCGLenum) const;
// Return false if framebuffer is incomplete.
bool initializeAttachments(GraphicsContextGLOpenGL*, const char** reason);
// Check if the framebuffer is currently bound to the given target.
bool isBound(GCGLenum target) const;
// attach 'attachment' at 'attachmentPoint'.
void attach(GCGLenum target, GCGLenum attachment, GCGLenum attachmentPoint);
// Check if a new drawBuffers call should be issued. This is called when we add or remove an attachment.
void drawBuffersIfNecessary(bool force);
typedef WTF::HashMap<GCGLenum, RefPtr<WebGLAttachment>> AttachmentMap;
AttachmentMap m_attachments;
bool m_hasEverBeenBound;
Vector<GCGLenum> m_drawBuffers;
Vector<GCGLenum> m_filteredDrawBuffers;
};
} // namespace WebCore
#endif