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diff --git a/gfx/angle/checkout/src/libANGLE/Image.h b/gfx/angle/checkout/src/libANGLE/Image.h
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+//
+// Copyright 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/FastVector.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"
+
+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:
+ 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;
+ bool isYUV() const override;
+ bool isCreatedWithAHB() const override;
+ bool hasProtectedContent() const override;
+
+ 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,
+ RefCountObjectReleaser<Image> *outReleaseImage);
+
+ 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);
+
+ static constexpr size_t kSourcesOfSetSize = 2;
+ angle::FlatUnorderedSet<Image *, kSourcesOfSetSize> 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;
+ GLuint getLevelCount() const;
+ bool isRenderable(const gl::Context *context,
+ GLenum binding,
+ const gl::ImageIndex &imageIndex) const override;
+ bool isTextureable(const gl::Context *context) const;
+ bool isYUV() const override;
+ bool isCubeMap() const;
+ bool hasProtectedContent() const override;
+
+ void onAttach(const gl::Context *context, rx::Serial framebufferSerial) override;
+ void onDetach(const gl::Context *context, rx::Serial framebufferSerial) override;
+ GLuint getId() const override;
+
+ gl::InitState initState(GLenum binding, const gl::ImageIndex &imageIndex) const override;
+ void setInitState(GLenum binding,
+ const gl::ImageIndex &imageIndex,
+ gl::InitState initState) override;
+
+ rx::ExternalImageSiblingImpl *getImplementation() const;
+
+ protected:
+ rx::FramebufferAttachmentObjectImpl *getAttachmentImpl() const override;
+
+ private:
+ // ObserverInterface implementation.
+ void onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message) override;
+
+ std::unique_ptr<rx::ExternalImageSiblingImpl> mImplementation;
+ angle::ObserverBinding mImplObserverBinding;
+};
+
+struct ImageState : private angle::NonCopyable
+{
+ ImageState(EGLenum target, ImageSibling *buffer, const AttributeMap &attribs);
+ ~ImageState();
+
+ EGLLabelKHR label;
+ EGLenum target;
+ gl::ImageIndex imageIndex;
+ ImageSibling *source;
+
+ gl::Format format;
+ bool yuv;
+ bool cubeMap;
+ gl::Extents size;
+ size_t samples;
+ GLuint levelCount;
+ EGLenum sourceType;
+ EGLenum colorspace;
+ bool hasProtectedContent;
+
+ mutable std::mutex targetsLock;
+
+ static constexpr size_t kTargetsSetSize = 2;
+ angle::FlatUnorderedSet<ImageSibling *, kTargetsSetSize> targets;
+};
+
+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;
+ bool isYUV() const;
+ bool isCreatedWithAHB() const;
+ // Returns true only if the eglImage contains a complete cubemap
+ bool isCubeMap() const;
+ size_t getWidth() const;
+ size_t getHeight() const;
+ const gl::Extents &getExtents() const;
+ bool isLayered() const;
+ size_t getSamples() const;
+ GLuint getLevelCount() const;
+ bool hasProtectedContent() const;
+
+ Error initialize(const Display *display);
+
+ rx::ImageImpl *getImplementation() const;
+
+ bool orphaned() const;
+ gl::InitState sourceInitState() const;
+ void setInitState(gl::InitState initState);
+
+ Error exportVkImage(void *vkImage, void *vkImageCreateInfo);
+
+ 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_