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//
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Framebuffer.h: Defines the gl::Framebuffer class. Implements GL framebuffer
// objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.
#ifndef LIBANGLE_FRAMEBUFFER_H_
#define LIBANGLE_FRAMEBUFFER_H_
#include <vector>
#include "common/Optional.h"
#include "common/angleutils.h"
#include "libANGLE/Constants.h"
#include "libANGLE/Debug.h"
#include "libANGLE/Error.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/RefCountObject.h"
#include "libANGLE/signal_utils.h"
namespace rx
{
class ContextImpl;
class GLImplFactory;
class FramebufferImpl;
class RenderbufferImpl;
class SurfaceImpl;
}
namespace egl
{
class Surface;
}
namespace gl
{
class Context;
class Framebuffer;
class Renderbuffer;
class State;
class Texture;
class TextureCapsMap;
struct Caps;
class ContextState;
struct Extensions;
struct ImageIndex;
struct Rectangle;
class FramebufferState final : angle::NonCopyable
{
public:
FramebufferState();
explicit FramebufferState(const Caps &caps);
~FramebufferState();
const std::string &getLabel();
const FramebufferAttachment *getAttachment(GLenum attachment) const;
const FramebufferAttachment *getReadAttachment() const;
const FramebufferAttachment *getFirstColorAttachment() const;
const FramebufferAttachment *getDepthOrStencilAttachment() const;
const FramebufferAttachment *getColorAttachment(size_t colorAttachment) const;
const FramebufferAttachment *getDepthAttachment() const;
const FramebufferAttachment *getStencilAttachment() const;
const FramebufferAttachment *getDepthStencilAttachment() const;
const std::vector<GLenum> &getDrawBufferStates() const { return mDrawBufferStates; }
GLenum getReadBufferState() const { return mReadBufferState; }
const std::vector<FramebufferAttachment> &getColorAttachments() const
{
return mColorAttachments;
}
bool attachmentsHaveSameDimensions() const;
bool colorAttachmentsAreUniqueImages() const;
const FramebufferAttachment *getDrawBuffer(size_t drawBufferIdx) const;
size_t getDrawBufferCount() const;
private:
friend class Framebuffer;
std::string mLabel;
std::vector<FramebufferAttachment> mColorAttachments;
FramebufferAttachment mDepthAttachment;
FramebufferAttachment mStencilAttachment;
std::vector<GLenum> mDrawBufferStates;
GLenum mReadBufferState;
};
class Framebuffer final : public LabeledObject, public angle::SignalReceiver
{
public:
Framebuffer(const Caps &caps, rx::GLImplFactory *factory, GLuint id);
Framebuffer(rx::SurfaceImpl *surface);
virtual ~Framebuffer();
void setLabel(const std::string &label) override;
const std::string &getLabel() const override;
rx::FramebufferImpl *getImplementation() const { return mImpl; }
GLuint id() const { return mId; }
void setAttachment(GLenum type,
GLenum binding,
const ImageIndex &textureIndex,
FramebufferAttachmentObject *resource);
void resetAttachment(GLenum binding);
void detachTexture(GLuint texture);
void detachRenderbuffer(GLuint renderbuffer);
const FramebufferAttachment *getColorbuffer(size_t colorAttachment) const;
const FramebufferAttachment *getDepthbuffer() const;
const FramebufferAttachment *getStencilbuffer() const;
const FramebufferAttachment *getDepthStencilBuffer() const;
const FramebufferAttachment *getDepthOrStencilbuffer() const;
const FramebufferAttachment *getReadColorbuffer() const;
GLenum getReadColorbufferType() const;
const FramebufferAttachment *getFirstColorbuffer() const;
const FramebufferAttachment *getAttachment(GLenum attachment) const;
size_t getDrawbufferStateCount() const;
GLenum getDrawBufferState(size_t drawBuffer) const;
const std::vector<GLenum> &getDrawBufferStates() const;
void setDrawBuffers(size_t count, const GLenum *buffers);
const FramebufferAttachment *getDrawBuffer(size_t drawBuffer) const;
bool hasEnabledDrawBuffer() const;
GLenum getReadBufferState() const;
void setReadBuffer(GLenum buffer);
size_t getNumColorBuffers() const;
bool hasDepth() const;
bool hasStencil() const;
bool usingExtendedDrawBuffers() const;
// This method calls checkStatus.
int getSamples(const ContextState &state);
GLenum checkStatus(const ContextState &state);
// Helper for checkStatus == GL_FRAMEBUFFER_COMPLETE.
bool complete(const ContextState &state);
bool hasValidDepthStencil() const;
Error discard(size_t count, const GLenum *attachments);
Error invalidate(size_t count, const GLenum *attachments);
Error invalidateSub(size_t count, const GLenum *attachments, const gl::Rectangle &area);
Error clear(rx::ContextImpl *context, GLbitfield mask);
Error clearBufferfv(rx::ContextImpl *context,
GLenum buffer,
GLint drawbuffer,
const GLfloat *values);
Error clearBufferuiv(rx::ContextImpl *context,
GLenum buffer,
GLint drawbuffer,
const GLuint *values);
Error clearBufferiv(rx::ContextImpl *context,
GLenum buffer,
GLint drawbuffer,
const GLint *values);
Error clearBufferfi(rx::ContextImpl *context,
GLenum buffer,
GLint drawbuffer,
GLfloat depth,
GLint stencil);
GLenum getImplementationColorReadFormat() const;
GLenum getImplementationColorReadType() const;
Error readPixels(rx::ContextImpl *context,
const gl::Rectangle &area,
GLenum format,
GLenum type,
GLvoid *pixels) const;
Error blit(rx::ContextImpl *context,
const Rectangle &sourceArea,
const Rectangle &destArea,
GLbitfield mask,
GLenum filter);
enum DirtyBitType
{
DIRTY_BIT_COLOR_ATTACHMENT_0,
DIRTY_BIT_COLOR_ATTACHMENT_MAX =
DIRTY_BIT_COLOR_ATTACHMENT_0 + gl::IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS,
DIRTY_BIT_DEPTH_ATTACHMENT = DIRTY_BIT_COLOR_ATTACHMENT_MAX,
DIRTY_BIT_STENCIL_ATTACHMENT,
DIRTY_BIT_DRAW_BUFFERS,
DIRTY_BIT_READ_BUFFER,
DIRTY_BIT_UNKNOWN,
DIRTY_BIT_MAX = DIRTY_BIT_UNKNOWN,
};
typedef std::bitset<DIRTY_BIT_MAX> DirtyBits;
bool hasAnyDirtyBit() const { return mDirtyBits.any(); }
void syncState();
// angle::SignalReceiver implementation
void signal(angle::SignalToken token) override;
private:
void detachResourceById(GLenum resourceType, GLuint resourceId);
void detachMatchingAttachment(FramebufferAttachment *attachment,
GLenum matchType,
GLuint matchId,
size_t dirtyBit);
GLenum checkStatusImpl(const ContextState &state);
FramebufferState mState;
rx::FramebufferImpl *mImpl;
GLuint mId;
Optional<GLenum> mCachedStatus;
std::vector<angle::ChannelBinding> mDirtyColorAttachmentBindings;
angle::ChannelBinding mDirtyDepthAttachmentBinding;
angle::ChannelBinding mDirtyStencilAttachmentBinding;
DirtyBits mDirtyBits;
};
} // namespace gl
#endif // LIBANGLE_FRAMEBUFFER_H_
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