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//
// Copyright (c) 2015 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.
//
// Image.h: Defines the egl::Image class representing the EGLimage object.
#ifndef LIBANGLE_IMAGE_H_
#define LIBANGLE_IMAGE_H_
#include "common/angleutils.h"
#include "libANGLE/AttributeMap.h"
#include "libANGLE/Debug.h"
#include "libANGLE/Error.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/RefCountObject.h"
#include "libANGLE/formatutils.h"
#include <set>
namespace rx
{
class EGLImplFactory;
class ImageImpl;
class ExternalImageSiblingImpl;
// Used for distinguishing dirty bit messages from gl::Texture/rx::TexureImpl/gl::Image.
constexpr size_t kTextureImageImplObserverMessageIndex = 0;
constexpr size_t kTextureImageSiblingMessageIndex = 1;
} // namespace rx
namespace egl
{
class Image;
class Display;
// Only currently Renderbuffers and Textures can be bound with images. This makes the relationship
// explicit, and also ensures that an image sibling can determine if it's been initialized or not,
// which is important for the robust resource init extension with Textures and EGLImages.
class ImageSibling : public gl::FramebufferAttachmentObject, public angle::ObserverInterface
{
public:
ImageSibling();
~ImageSibling() override;
bool isEGLImageTarget() const;
gl::InitState sourceEGLImageInitState() const;
void setSourceEGLImageInitState(gl::InitState initState) const;
bool isRenderable(const gl::Context *context,
GLenum binding,
const gl::ImageIndex &imageIndex) const override;
// ObserverInterface implementation
void onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message) override
{
// default to no-op.
}
protected:
// Set the image target of this sibling
void setTargetImage(const gl::Context *context, egl::Image *imageTarget);
// Orphan all EGL image sources and targets
angle::Result orphanImages(const gl::Context *context);
void notifySiblings(angle::SubjectMessage message);
private:
friend class Image;
// Called from Image only to add a new source image
void addImageSource(egl::Image *imageSource);
// Called from Image only to remove a source image when the Image is being deleted
void removeImageSource(egl::Image *imageSource);
std::set<Image *> mSourcesOf;
BindingPointer<Image> mTargetOf;
};
// Wrapper for EGLImage sources that are not owned by ANGLE, these often have to do
// platform-specific queries for format and size information.
class ExternalImageSibling : public ImageSibling
{
public:
ExternalImageSibling(rx::EGLImplFactory *factory,
const gl::Context *context,
EGLenum target,
EGLClientBuffer buffer,
const AttributeMap &attribs);
~ExternalImageSibling() override;
void onDestroy(const egl::Display *display);
Error initialize(const Display *display);
gl::Extents getAttachmentSize(const gl::ImageIndex &imageIndex) const override;
gl::Format getAttachmentFormat(GLenum binding, const gl::ImageIndex &imageIndex) const override;
GLsizei getAttachmentSamples(const gl::ImageIndex &imageIndex) const override;
bool isRenderable(const gl::Context *context,
GLenum binding,
const gl::ImageIndex &imageIndex) const override;
bool isTextureable(const gl::Context *context) const;
void onAttach(const gl::Context *context) override;
void onDetach(const gl::Context *context) override;
GLuint getId() const override;
gl::InitState initState(const gl::ImageIndex &imageIndex) const override;
void setInitState(const gl::ImageIndex &imageIndex, gl::InitState initState) override;
rx::ExternalImageSiblingImpl *getImplementation() const;
protected:
rx::FramebufferAttachmentObjectImpl *getAttachmentImpl() const override;
private:
std::unique_ptr<rx::ExternalImageSiblingImpl> mImplementation;
};
struct ImageState : private angle::NonCopyable
{
ImageState(EGLenum target, ImageSibling *buffer, const AttributeMap &attribs);
~ImageState();
EGLLabelKHR label;
EGLenum target;
gl::ImageIndex imageIndex;
ImageSibling *source;
std::set<ImageSibling *> targets;
gl::Format format;
gl::Extents size;
size_t samples;
EGLenum sourceType;
};
class Image final : public RefCountObject, public LabeledObject
{
public:
Image(rx::EGLImplFactory *factory,
const gl::Context *context,
EGLenum target,
ImageSibling *buffer,
const AttributeMap &attribs);
void onDestroy(const Display *display) override;
~Image() override;
void setLabel(EGLLabelKHR label) override;
EGLLabelKHR getLabel() const override;
const gl::Format &getFormat() const;
bool isRenderable(const gl::Context *context) const;
bool isTexturable(const gl::Context *context) const;
size_t getWidth() const;
size_t getHeight() const;
size_t getSamples() const;
Error initialize(const Display *display);
rx::ImageImpl *getImplementation() const;
bool orphaned() const;
gl::InitState sourceInitState() const;
void setInitState(gl::InitState initState);
private:
friend class ImageSibling;
// Called from ImageSibling only notify the image that a new target sibling exists for state
// tracking.
void addTargetSibling(ImageSibling *sibling);
// Called from ImageSibling only to notify the image that a sibling (source or target) has
// been respecified and state tracking should be updated.
angle::Result orphanSibling(const gl::Context *context, ImageSibling *sibling);
void notifySiblings(const ImageSibling *notifier, angle::SubjectMessage message);
ImageState mState;
rx::ImageImpl *mImplementation;
bool mOrphanedAndNeedsInit;
};
} // namespace egl
#endif // LIBANGLE_IMAGE_H_
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