include/gpu/GrBackendSurface.h - skia - Git at Google

 /*
  * Copyright 2017 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #ifndef GrBackendSurface_DEFINED
 #define GrBackendSurface_DEFINED

 // This include of GrBackendSurfaceMutableState is not needed here, but some clients were depending
 // on the include here instead of including it themselves. Adding this back here until we can fix
 // up clients so it can be removed.
 #include "include/gpu/GrBackendSurfaceMutableState.h"

 #include "include/gpu/GrSurfaceInfo.h"
 #include "include/gpu/GrTypes.h"
 #include "include/gpu/MutableTextureState.h"
 #ifdef SK_GL
 #include "include/gpu/gl/GrGLTypes.h"
 #include "include/private/gpu/ganesh/GrGLTypesPriv.h"
 #endif
 #include "include/gpu/mock/GrMockTypes.h"
 #ifdef SK_VULKAN
 #include "include/gpu/vk/GrVkTypes.h"
 #include "include/private/gpu/ganesh/GrVkTypesPriv.h"
 #endif

 #ifdef SK_DAWN
 #include "include/gpu/dawn/GrDawnTypes.h"
 #endif

 #include <string>

 class GrVkImageLayout;
 class GrGLTextureParameters;
 class GrColorFormatDesc;
 enum class SkTextureCompressionType;

 namespace skgpu {
 class MutableTextureStateRef;
 }

 #ifdef SK_DAWN
 #include "webgpu/webgpu_cpp.h"
 #endif

 #ifdef SK_METAL
 #include "include/gpu/mtl/GrMtlTypes.h"
 #endif

 #ifdef SK_DIRECT3D
 #include "include/private/gpu/ganesh/GrD3DTypesMinimal.h"
 class GrD3DResourceState;
 #endif

 #if defined(SK_DEBUG) || GR_TEST_UTILS
 class SkString;
 #endif

 #if !defined(SK_GANESH)

 // SkSurfaceCharacterization always needs a minimal version of this
 class SK_API GrBackendFormat {
 public:
     bool isValid() const { return false; }
 };

 // SkSurface and SkImage rely on a minimal version of these always being available
 class SK_API GrBackendTexture {
 public:
     GrBackendTexture() {}

     bool isValid() const { return false; }
 };

 class SK_API GrBackendRenderTarget {
 public:
     GrBackendRenderTarget() {}

     bool isValid() const { return false; }
     bool isFramebufferOnly() const { return false; }
 };
 #else

 enum class GrGLFormat;

 class SK_API GrBackendFormat {
 public:
     // Creates an invalid backend format.
     GrBackendFormat() {}
     GrBackendFormat(const GrBackendFormat&);
     GrBackendFormat& operator=(const GrBackendFormat&);

 #ifdef SK_GL
     static GrBackendFormat MakeGL(GrGLenum format, GrGLenum target) {
         return GrBackendFormat(format, target);
     }
 #endif

 #ifdef SK_VULKAN
     static GrBackendFormat MakeVk(VkFormat format, bool willUseDRMFormatModifiers = false) {
         return GrBackendFormat(format, GrVkYcbcrConversionInfo(), willUseDRMFormatModifiers);
     }

     static GrBackendFormat MakeVk(const GrVkYcbcrConversionInfo& ycbcrInfo,
                                   bool willUseDRMFormatModifiers = false);
 #endif

 #ifdef SK_DAWN
     static GrBackendFormat MakeDawn(wgpu::TextureFormat format) {
         return GrBackendFormat(format);
     }
 #endif

 #ifdef SK_METAL
     static GrBackendFormat MakeMtl(GrMTLPixelFormat format) {
         return GrBackendFormat(format);
     }
 #endif

 #ifdef SK_DIRECT3D
     static GrBackendFormat MakeDxgi(DXGI_FORMAT format) {
         return GrBackendFormat(format);
     }
 #endif

     static GrBackendFormat MakeMock(GrColorType colorType,
                                     SkTextureCompressionType compression,
                                     bool isStencilFormat = false);

     bool operator==(const GrBackendFormat& that) const;
     bool operator!=(const GrBackendFormat& that) const { return !(*this == that); }

     GrBackendApi backend() const { return fBackend; }
     GrTextureType textureType() const { return fTextureType; }

     /**
      * Gets the channels present in the format as a bitfield of SkColorChannelFlag values.
      * Luminance channels are reported as kGray_SkColorChannelFlag.
      */
     uint32_t channelMask() const;

     GrColorFormatDesc desc() const;

 #ifdef SK_GL
     /**
      * If the backend API is GL this gets the format as a GrGLFormat. Otherwise, returns
      * GrGLFormat::kUnknown.
      */
     GrGLFormat asGLFormat() const;

     GrGLenum asGLFormatEnum() const;
 #endif

 #ifdef SK_VULKAN
     /**
      * If the backend API is Vulkan this gets the format as a VkFormat and returns true. Otherwise,
      * returns false.
      */
     bool asVkFormat(VkFormat*) const;

     const GrVkYcbcrConversionInfo* getVkYcbcrConversionInfo() const;
 #endif

 #ifdef SK_DAWN
     /**
      * If the backend API is Dawn this gets the format as a wgpu::TextureFormat and returns true.
      * Otherwise, returns false.
      */
     bool asDawnFormat(wgpu::TextureFormat*) const;
 #endif

 #ifdef SK_METAL
     /**
      * If the backend API is Metal this gets the format as a GrMtlPixelFormat. Otherwise,
      * Otherwise, returns MTLPixelFormatInvalid.
      */
     GrMTLPixelFormat asMtlFormat() const;
 #endif

 #ifdef SK_DIRECT3D
     /**
      * If the backend API is Direct3D this gets the format as a DXGI_FORMAT and returns true.
      * Otherwise, returns false.
      */
     bool asDxgiFormat(DXGI_FORMAT*) const;
 #endif

     /**
      * If the backend API is not Mock these three calls will return kUnknown, kNone or false,
      * respectively. Otherwise, only one of the following can be true. The GrColorType is not
      * kUnknown, the compression type is not kNone, or this is a mock stencil format.
      */
     GrColorType asMockColorType() const;
     SkTextureCompressionType asMockCompressionType() const;
     bool isMockStencilFormat() const;

     // If possible, copies the GrBackendFormat and forces the texture type to be Texture2D. If the
     // GrBackendFormat was for Vulkan and it originally had a GrVkYcbcrConversionInfo, we will
     // remove the conversion and set the format to be VK_FORMAT_R8G8B8A8_UNORM.
     GrBackendFormat makeTexture2D() const;

     // Returns true if the backend format has been initialized.
     bool isValid() const { return fValid; }

 #if defined(SK_DEBUG) || GR_TEST_UTILS
     SkString toStr() const;
 #endif

 private:
 #ifdef SK_GL
     GrBackendFormat(GrGLenum format, GrGLenum target);
 #endif

 #ifdef SK_VULKAN
     GrBackendFormat(const VkFormat vkFormat, const GrVkYcbcrConversionInfo&,
                     bool willUseDRMFormatModifiers);
 #endif

 #ifdef SK_DAWN
     GrBackendFormat(wgpu::TextureFormat format);
 #endif

 #ifdef SK_METAL
     GrBackendFormat(const GrMTLPixelFormat mtlFormat);
 #endif

 #ifdef SK_DIRECT3D
     GrBackendFormat(DXGI_FORMAT dxgiFormat);
 #endif

     GrBackendFormat(GrColorType, SkTextureCompressionType, bool isStencilFormat);

 #ifdef SK_DEBUG
     bool validateMock() const;
 #endif

     GrBackendApi fBackend = GrBackendApi::kMock;
     bool         fValid = false;

     union {
 #ifdef SK_GL
         GrGLenum fGLFormat; // the sized, internal format of the GL resource
 #endif
 #ifdef SK_VULKAN
         struct {
             VkFormat                 fFormat;
             GrVkYcbcrConversionInfo  fYcbcrConversionInfo;
         } fVk;
 #endif
 #ifdef SK_DAWN
         wgpu::TextureFormat fDawnFormat;
 #endif

 #ifdef SK_METAL
         GrMTLPixelFormat fMtlFormat;
 #endif

 #ifdef SK_DIRECT3D
         DXGI_FORMAT fDxgiFormat;
 #endif
         struct {
             GrColorType fColorType;
             SkTextureCompressionType fCompressionType;
             bool fIsStencilFormat;
         } fMock;
     };
     GrTextureType fTextureType = GrTextureType::kNone;
 };

 class SK_API GrBackendTexture {
 public:
     // Creates an invalid backend texture.
     GrBackendTexture();

 #ifdef SK_GL
     // The GrGLTextureInfo must have a valid fFormat.
     GrBackendTexture(int width,
                      int height,
                      GrMipmapped,
                      const GrGLTextureInfo& glInfo,
                      std::string_view label = {});
 #endif

 #ifdef SK_VULKAN
     GrBackendTexture(int width,
                      int height,
                      const GrVkImageInfo& vkInfo,
                      std::string_view label = {});
 #endif

 #ifdef SK_METAL
     GrBackendTexture(int width,
                      int height,
                      GrMipmapped,
                      const GrMtlTextureInfo& mtlInfo,
                      std::string_view label = {});
 #endif

 #ifdef SK_DIRECT3D
     GrBackendTexture(int width,
                      int height,
                      const GrD3DTextureResourceInfo& d3dInfo,
                      std::string_view label = {});
 #endif

 #ifdef SK_DAWN
     GrBackendTexture(int width,
                      int height,
                      const GrDawnTextureInfo& dawnInfo,
                      std::string_view label = {});
 #endif

     GrBackendTexture(int width,
                      int height,
                      GrMipmapped,
                      const GrMockTextureInfo& mockInfo,
                      std::string_view label = {});

     GrBackendTexture(const GrBackendTexture& that);

     ~GrBackendTexture();

     GrBackendTexture& operator=(const GrBackendTexture& that);

     SkISize dimensions() const { return {fWidth, fHeight}; }
     int width() const { return fWidth; }
     int height() const { return fHeight; }
     std::string_view getLabel() const { return fLabel; }
     GrMipmapped mipmapped() const { return fMipmapped; }
     bool hasMipmaps() const { return fMipmapped == GrMipmapped::kYes; }
     /** deprecated alias of hasMipmaps(). */
     bool hasMipMaps() const { return this->hasMipmaps(); }
     GrBackendApi backend() const {return fBackend; }
     GrTextureType textureType() const { return fTextureType; }

 #ifdef SK_GL
     // If the backend API is GL, copies a snapshot of the GrGLTextureInfo struct into the passed in
     // pointer and returns true. Otherwise returns false if the backend API is not GL.
     bool getGLTextureInfo(GrGLTextureInfo*) const;

     // Call this to indicate that the texture parameters have been modified in the GL context
     // externally to GrContext.
     void glTextureParametersModified();
 #endif

 #ifdef SK_DAWN
     // If the backend API is Dawn, copies a snapshot of the GrDawnTextureInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
     bool getDawnTextureInfo(GrDawnTextureInfo*) const;
 #endif

 #ifdef SK_VULKAN
     // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
     // in pointer and returns true. This snapshot will set the fImageLayout to the current layout
     // state. Otherwise returns false if the backend API is not Vulkan.
     bool getVkImageInfo(GrVkImageInfo*) const;

     // Anytime the client changes the VkImageLayout of the VkImage captured by this
     // GrBackendTexture, they must call this function to notify Skia of the changed layout.
     void setVkImageLayout(VkImageLayout);
 #endif

 #ifdef SK_METAL
     // If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not Metal.
     bool getMtlTextureInfo(GrMtlTextureInfo*) const;
 #endif

 #ifdef SK_DIRECT3D
     // If the backend API is Direct3D, copies a snapshot of the GrD3DTextureResourceInfo struct into
     // the passed in pointer and returns true. This snapshot will set the fResourceState to the
     // current resource state. Otherwise returns false if the backend API is not D3D.
     bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const;

     // Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this
     // GrBackendTexture, they must call this function to notify Skia of the changed layout.
     void setD3DResourceState(GrD3DResourceStateEnum);
 #endif

     // Get the GrBackendFormat for this texture (or an invalid format if this is not valid).
     GrBackendFormat getBackendFormat() const;

     // If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not Mock.
     bool getMockTextureInfo(GrMockTextureInfo*) const;

     // If the client changes any of the mutable backend of the GrBackendTexture they should call
     // this function to inform Skia that those values have changed. The backend API specific state
     // that can be set from this function are:
     //
     // Vulkan: VkImageLayout and QueueFamilyIndex
     void setMutableState(const skgpu::MutableTextureState&);

     // Returns true if we are working with protected content.
     bool isProtected() const;

     // Returns true if the backend texture has been initialized.
     bool isValid() const { return fIsValid; }

     // Returns true if both textures are valid and refer to the same API texture.
     bool isSameTexture(const GrBackendTexture&);

 #if GR_TEST_UTILS
     static bool TestingOnly_Equals(const GrBackendTexture& , const GrBackendTexture&);
 #endif

 private:
     friend class GrVkGpu;  // for getMutableState
     sk_sp<skgpu::MutableTextureStateRef> getMutableState() const;

 #ifdef SK_GL
     friend class GrGLTexture;
     friend class GrGLGpu;    // for getGLTextureParams
     GrBackendTexture(int width,
                      int height,
                      GrMipmapped,
                      const GrGLTextureInfo,
                      sk_sp<GrGLTextureParameters>,
                      std::string_view label = {});
     sk_sp<GrGLTextureParameters> getGLTextureParams() const;
 #endif

 #ifdef SK_VULKAN
     friend class GrVkTexture;
     GrBackendTexture(int width,
                      int height,
                      const GrVkImageInfo& vkInfo,
                      sk_sp<skgpu::MutableTextureStateRef> mutableState,
                      std::string_view label = {});
 #endif

 #ifdef SK_DIRECT3D
     friend class GrD3DTexture;
     friend class GrD3DGpu;     // for getGrD3DResourceState
     GrBackendTexture(int width,
                      int height,
                      const GrD3DTextureResourceInfo& vkInfo,
                      sk_sp<GrD3DResourceState> state,
                      std::string_view label = {});
     sk_sp<GrD3DResourceState> getGrD3DResourceState() const;
 #endif

     // Free and release and resources being held by the GrBackendTexture.
     void cleanup();

     bool fIsValid;
     int fWidth;         //<! width in pixels
     int fHeight;        //<! height in pixels
     const std::string fLabel;
     GrMipmapped fMipmapped;
     GrBackendApi fBackend;
     GrTextureType fTextureType;

     union {
 #ifdef SK_GL
         GrGLBackendTextureInfo fGLInfo;
 #endif
 #ifdef SK_VULKAN
         GrVkBackendSurfaceInfo fVkInfo;
 #endif
         GrMockTextureInfo fMockInfo;
 #ifdef SK_DIRECT3D
         GrD3DBackendSurfaceInfo fD3DInfo;
 #endif
     };
 #ifdef SK_METAL
     GrMtlTextureInfo fMtlInfo;
 #endif
 #ifdef SK_DAWN
     GrDawnTextureInfo fDawnInfo;
 #endif

     sk_sp<skgpu::MutableTextureStateRef> fMutableState;
 };

 class SK_API GrBackendRenderTarget {
 public:
     // Creates an invalid backend texture.
     GrBackendRenderTarget();

 #ifdef SK_GL
     // The GrGLTextureInfo must have a valid fFormat. If wrapping in an SkSurface we require the
     // stencil bits to be either 0, 8 or 16.
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           int stencilBits,
                           const GrGLFramebufferInfo& glInfo);
 #endif

 #ifdef SK_DAWN
     // If wrapping in an SkSurface we require the stencil bits to be either 0, 8 or 16.
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           int stencilBits,
                           const GrDawnRenderTargetInfo& dawnInfo);
 #endif

 #ifdef SK_VULKAN
     /** Deprecated. Sample count is now part of GrVkImageInfo. */
     GrBackendRenderTarget(int width, int height, int sampleCnt, const GrVkImageInfo& vkInfo);

     GrBackendRenderTarget(int width, int height, const GrVkImageInfo& vkInfo);
 #endif

 #ifdef SK_METAL
     GrBackendRenderTarget(int width,
                           int height,
                           const GrMtlTextureInfo& mtlInfo);
     /** Deprecated. Sample count is ignored and is instead retrieved from the MtlTexture. */
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           const GrMtlTextureInfo& mtlInfo);
 #endif

 #ifdef SK_DIRECT3D
     GrBackendRenderTarget(int width,
                           int height,
                           const GrD3DTextureResourceInfo& d3dInfo);
 #endif

     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           int stencilBits,
                           const GrMockRenderTargetInfo& mockInfo);

     ~GrBackendRenderTarget();

     GrBackendRenderTarget(const GrBackendRenderTarget& that);
     GrBackendRenderTarget& operator=(const GrBackendRenderTarget&);

     SkISize dimensions() const { return {fWidth, fHeight}; }
     int width() const { return fWidth; }
     int height() const { return fHeight; }
     int sampleCnt() const { return fSampleCnt; }
     int stencilBits() const { return fStencilBits; }
     GrBackendApi backend() const {return fBackend; }
     bool isFramebufferOnly() const { return fFramebufferOnly; }

 #ifdef SK_GL
     // If the backend API is GL, copies a snapshot of the GrGLFramebufferInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not GL.
     bool getGLFramebufferInfo(GrGLFramebufferInfo*) const;
 #endif

 #ifdef SK_DAWN
     // If the backend API is Dawn, copies a snapshot of the GrDawnRenderTargetInfo struct into the
     // passed-in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
     bool getDawnRenderTargetInfo(GrDawnRenderTargetInfo*) const;
 #endif

 #ifdef SK_VULKAN
     // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
     // in pointer and returns true. This snapshot will set the fImageLayout to the current layout
     // state. Otherwise returns false if the backend API is not Vulkan.
     bool getVkImageInfo(GrVkImageInfo*) const;

     // Anytime the client changes the VkImageLayout of the VkImage captured by this
     // GrBackendRenderTarget, they must call this function to notify Skia of the changed layout.
     void setVkImageLayout(VkImageLayout);
 #endif

 #ifdef SK_METAL
     // If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not Metal.
     bool getMtlTextureInfo(GrMtlTextureInfo*) const;
 #endif

 #ifdef SK_DIRECT3D
     // If the backend API is Direct3D, copies a snapshot of the GrMtlTextureInfo struct into the
     // passed in pointer and returns true. Otherwise returns false if the backend API is not D3D.
     bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const;

     // Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this
     // GrBackendTexture, they must call this function to notify Skia of the changed layout.
     void setD3DResourceState(GrD3DResourceStateEnum);
 #endif

     // Get the GrBackendFormat for this render target (or an invalid format if this is not valid).
     GrBackendFormat getBackendFormat() const;

     // If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed
     // in pointer and returns true. Otherwise returns false if the backend API is not Mock.
     bool getMockRenderTargetInfo(GrMockRenderTargetInfo*) const;

     // If the client changes any of the mutable backend of the GrBackendTexture they should call
     // this function to inform Skia that those values have changed. The backend API specific state
     // that can be set from this function are:
     //
     // Vulkan: VkImageLayout and QueueFamilyIndex
     void setMutableState(const skgpu::MutableTextureState&);

     // Returns true if we are working with protected content.
     bool isProtected() const;

     // Returns true if the backend texture has been initialized.
     bool isValid() const { return fIsValid; }


 #if GR_TEST_UTILS
     static bool TestingOnly_Equals(const GrBackendRenderTarget&, const GrBackendRenderTarget&);
 #endif

 private:
     friend class GrVkGpu; // for getMutableState
     sk_sp<skgpu::MutableTextureStateRef> getMutableState() const;

 #ifdef SK_VULKAN
     friend class GrVkRenderTarget;
     GrBackendRenderTarget(int width,
                           int height,
                           const GrVkImageInfo& vkInfo,
                           sk_sp<skgpu::MutableTextureStateRef> mutableState);
 #endif

 #ifdef SK_DIRECT3D
     friend class GrD3DGpu;
     friend class GrD3DRenderTarget;
     GrBackendRenderTarget(int width,
                           int height,
                           const GrD3DTextureResourceInfo& d3dInfo,
                           sk_sp<GrD3DResourceState> state);
     sk_sp<GrD3DResourceState> getGrD3DResourceState() const;
 #endif

     // Free and release and resources being held by the GrBackendTexture.
     void cleanup();

     bool fIsValid;
     bool fFramebufferOnly = false;
     int fWidth;         //<! width in pixels
     int fHeight;        //<! height in pixels

     int fSampleCnt;
     int fStencilBits;

     GrBackendApi fBackend;

     union {
 #ifdef SK_GL
         GrGLFramebufferInfo fGLInfo;
 #endif
 #ifdef SK_VULKAN
         GrVkBackendSurfaceInfo fVkInfo;
 #endif
         GrMockRenderTargetInfo fMockInfo;
 #ifdef SK_DIRECT3D
         GrD3DBackendSurfaceInfo fD3DInfo;
 #endif
     };
 #ifdef SK_METAL
     GrMtlTextureInfo fMtlInfo;
 #endif
 #ifdef SK_DAWN
     GrDawnRenderTargetInfo  fDawnInfo;
 #endif
     sk_sp<skgpu::MutableTextureStateRef> fMutableState;
 };

 #endif

 #endif
	/*
	* Copyright 2017 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#ifndef GrBackendSurface_DEFINED
	#define GrBackendSurface_DEFINED

	// This include of GrBackendSurfaceMutableState is not needed here, but some clients were depending
	// on the include here instead of including it themselves. Adding this back here until we can fix
	// up clients so it can be removed.
	#include "include/gpu/GrBackendSurfaceMutableState.h"

	#include "include/gpu/GrSurfaceInfo.h"
	#include "include/gpu/GrTypes.h"
	#include "include/gpu/MutableTextureState.h"
	#ifdef SK_GL
	#include "include/gpu/gl/GrGLTypes.h"
	#include "include/private/gpu/ganesh/GrGLTypesPriv.h"
	#endif
	#include "include/gpu/mock/GrMockTypes.h"
	#ifdef SK_VULKAN
	#include "include/gpu/vk/GrVkTypes.h"
	#include "include/private/gpu/ganesh/GrVkTypesPriv.h"
	#endif

	#ifdef SK_DAWN
	#include "include/gpu/dawn/GrDawnTypes.h"
	#endif

	#include <string>

	class GrVkImageLayout;
	class GrGLTextureParameters;
	class GrColorFormatDesc;
	enum class SkTextureCompressionType;

	namespace skgpu {
	class MutableTextureStateRef;
	}

	#ifdef SK_DAWN
	#include "webgpu/webgpu_cpp.h"
	#endif

	#ifdef SK_METAL
	#include "include/gpu/mtl/GrMtlTypes.h"
	#endif

	#ifdef SK_DIRECT3D
	#include "include/private/gpu/ganesh/GrD3DTypesMinimal.h"
	class GrD3DResourceState;
	#endif

	#if defined(SK_DEBUG) \|\| GR_TEST_UTILS
	class SkString;
	#endif

	#if !defined(SK_GANESH)

	// SkSurfaceCharacterization always needs a minimal version of this
	class SK_API GrBackendFormat {
	public:
	bool isValid() const { return false; }
	};

	// SkSurface and SkImage rely on a minimal version of these always being available
	class SK_API GrBackendTexture {
	public:
	GrBackendTexture() {}

	bool isValid() const { return false; }
	};

	class SK_API GrBackendRenderTarget {
	public:
	GrBackendRenderTarget() {}

	bool isValid() const { return false; }
	bool isFramebufferOnly() const { return false; }
	};
	#else

	enum class GrGLFormat;

	class SK_API GrBackendFormat {
	public:
	// Creates an invalid backend format.
	GrBackendFormat() {}
	GrBackendFormat(const GrBackendFormat&);
	GrBackendFormat& operator=(const GrBackendFormat&);

	#ifdef SK_GL
	static GrBackendFormat MakeGL(GrGLenum format, GrGLenum target) {
	return GrBackendFormat(format, target);
	}
	#endif

	#ifdef SK_VULKAN
	static GrBackendFormat MakeVk(VkFormat format, bool willUseDRMFormatModifiers = false) {
	return GrBackendFormat(format, GrVkYcbcrConversionInfo(), willUseDRMFormatModifiers);
	}

	static GrBackendFormat MakeVk(const GrVkYcbcrConversionInfo& ycbcrInfo,
	bool willUseDRMFormatModifiers = false);
	#endif

	#ifdef SK_DAWN
	static GrBackendFormat MakeDawn(wgpu::TextureFormat format) {
	return GrBackendFormat(format);
	}
	#endif

	#ifdef SK_METAL
	static GrBackendFormat MakeMtl(GrMTLPixelFormat format) {
	return GrBackendFormat(format);
	}
	#endif

	#ifdef SK_DIRECT3D
	static GrBackendFormat MakeDxgi(DXGI_FORMAT format) {
	return GrBackendFormat(format);
	}
	#endif

	static GrBackendFormat MakeMock(GrColorType colorType,
	SkTextureCompressionType compression,
	bool isStencilFormat = false);

	bool operator==(const GrBackendFormat& that) const;
	bool operator!=(const GrBackendFormat& that) const { return !(*this == that); }

	GrBackendApi backend() const { return fBackend; }
	GrTextureType textureType() const { return fTextureType; }

	/**
	* Gets the channels present in the format as a bitfield of SkColorChannelFlag values.
	* Luminance channels are reported as kGray_SkColorChannelFlag.
	*/
	uint32_t channelMask() const;

	GrColorFormatDesc desc() const;

	#ifdef SK_GL
	/**
	* If the backend API is GL this gets the format as a GrGLFormat. Otherwise, returns
	* GrGLFormat::kUnknown.
	*/
	GrGLFormat asGLFormat() const;

	GrGLenum asGLFormatEnum() const;
	#endif

	#ifdef SK_VULKAN
	/**
	* If the backend API is Vulkan this gets the format as a VkFormat and returns true. Otherwise,
	* returns false.
	*/
	bool asVkFormat(VkFormat*) const;

	const GrVkYcbcrConversionInfo* getVkYcbcrConversionInfo() const;
	#endif

	#ifdef SK_DAWN
	/**
	* If the backend API is Dawn this gets the format as a wgpu::TextureFormat and returns true.
	* Otherwise, returns false.
	*/
	bool asDawnFormat(wgpu::TextureFormat*) const;
	#endif

	#ifdef SK_METAL
	/**
	* If the backend API is Metal this gets the format as a GrMtlPixelFormat. Otherwise,
	* Otherwise, returns MTLPixelFormatInvalid.
	*/
	GrMTLPixelFormat asMtlFormat() const;
	#endif

	#ifdef SK_DIRECT3D
	/**
	* If the backend API is Direct3D this gets the format as a DXGI_FORMAT and returns true.
	* Otherwise, returns false.
	*/
	bool asDxgiFormat(DXGI_FORMAT*) const;
	#endif

	/**
	* If the backend API is not Mock these three calls will return kUnknown, kNone or false,
	* respectively. Otherwise, only one of the following can be true. The GrColorType is not
	* kUnknown, the compression type is not kNone, or this is a mock stencil format.
	*/
	GrColorType asMockColorType() const;
	SkTextureCompressionType asMockCompressionType() const;
	bool isMockStencilFormat() const;

	// If possible, copies the GrBackendFormat and forces the texture type to be Texture2D. If the
	// GrBackendFormat was for Vulkan and it originally had a GrVkYcbcrConversionInfo, we will
	// remove the conversion and set the format to be VK_FORMAT_R8G8B8A8_UNORM.
	GrBackendFormat makeTexture2D() const;

	// Returns true if the backend format has been initialized.
	bool isValid() const { return fValid; }

	#if defined(SK_DEBUG) \|\| GR_TEST_UTILS
	SkString toStr() const;
	#endif

	private:
	#ifdef SK_GL
	GrBackendFormat(GrGLenum format, GrGLenum target);
	#endif

	#ifdef SK_VULKAN
	GrBackendFormat(const VkFormat vkFormat, const GrVkYcbcrConversionInfo&,
	bool willUseDRMFormatModifiers);
	#endif

	#ifdef SK_DAWN
	GrBackendFormat(wgpu::TextureFormat format);
	#endif

	#ifdef SK_METAL
	GrBackendFormat(const GrMTLPixelFormat mtlFormat);
	#endif

	#ifdef SK_DIRECT3D
	GrBackendFormat(DXGI_FORMAT dxgiFormat);
	#endif

	GrBackendFormat(GrColorType, SkTextureCompressionType, bool isStencilFormat);

	#ifdef SK_DEBUG
	bool validateMock() const;
	#endif

	GrBackendApi fBackend = GrBackendApi::kMock;
	bool fValid = false;

	union {
	#ifdef SK_GL
	GrGLenum fGLFormat; // the sized, internal format of the GL resource
	#endif
	#ifdef SK_VULKAN
	struct {
	VkFormat fFormat;
	GrVkYcbcrConversionInfo fYcbcrConversionInfo;
	} fVk;
	#endif
	#ifdef SK_DAWN
	wgpu::TextureFormat fDawnFormat;
	#endif

	#ifdef SK_METAL
	GrMTLPixelFormat fMtlFormat;
	#endif

	#ifdef SK_DIRECT3D
	DXGI_FORMAT fDxgiFormat;
	#endif
	struct {
	GrColorType fColorType;
	SkTextureCompressionType fCompressionType;
	bool fIsStencilFormat;
	} fMock;
	};
	GrTextureType fTextureType = GrTextureType::kNone;
	};

	class SK_API GrBackendTexture {
	public:
	// Creates an invalid backend texture.
	GrBackendTexture();

	#ifdef SK_GL
	// The GrGLTextureInfo must have a valid fFormat.
	GrBackendTexture(int width,
	int height,
	GrMipmapped,
	const GrGLTextureInfo& glInfo,
	std::string_view label = {});
	#endif

	#ifdef SK_VULKAN
	GrBackendTexture(int width,
	int height,
	const GrVkImageInfo& vkInfo,
	std::string_view label = {});
	#endif

	#ifdef SK_METAL
	GrBackendTexture(int width,
	int height,
	GrMipmapped,
	const GrMtlTextureInfo& mtlInfo,
	std::string_view label = {});
	#endif

	#ifdef SK_DIRECT3D
	GrBackendTexture(int width,
	int height,
	const GrD3DTextureResourceInfo& d3dInfo,
	std::string_view label = {});
	#endif

	#ifdef SK_DAWN
	GrBackendTexture(int width,
	int height,
	const GrDawnTextureInfo& dawnInfo,
	std::string_view label = {});
	#endif

	GrBackendTexture(int width,
	int height,
	GrMipmapped,
	const GrMockTextureInfo& mockInfo,
	std::string_view label = {});

	GrBackendTexture(const GrBackendTexture& that);

	~GrBackendTexture();

	GrBackendTexture& operator=(const GrBackendTexture& that);

	SkISize dimensions() const { return {fWidth, fHeight}; }
	int width() const { return fWidth; }
	int height() const { return fHeight; }
	std::string_view getLabel() const { return fLabel; }
	GrMipmapped mipmapped() const { return fMipmapped; }
	bool hasMipmaps() const { return fMipmapped == GrMipmapped::kYes; }
	/** deprecated alias of hasMipmaps(). */
	bool hasMipMaps() const { return this->hasMipmaps(); }
	GrBackendApi backend() const {return fBackend; }
	GrTextureType textureType() const { return fTextureType; }

	#ifdef SK_GL
	// If the backend API is GL, copies a snapshot of the GrGLTextureInfo struct into the passed in
	// pointer and returns true. Otherwise returns false if the backend API is not GL.
	bool getGLTextureInfo(GrGLTextureInfo*) const;

	// Call this to indicate that the texture parameters have been modified in the GL context
	// externally to GrContext.
	void glTextureParametersModified();
	#endif

	#ifdef SK_DAWN
	// If the backend API is Dawn, copies a snapshot of the GrDawnTextureInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
	bool getDawnTextureInfo(GrDawnTextureInfo*) const;
	#endif

	#ifdef SK_VULKAN
	// If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
	// in pointer and returns true. This snapshot will set the fImageLayout to the current layout
	// state. Otherwise returns false if the backend API is not Vulkan.
	bool getVkImageInfo(GrVkImageInfo*) const;

	// Anytime the client changes the VkImageLayout of the VkImage captured by this
	// GrBackendTexture, they must call this function to notify Skia of the changed layout.
	void setVkImageLayout(VkImageLayout);
	#endif

	#ifdef SK_METAL
	// If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not Metal.
	bool getMtlTextureInfo(GrMtlTextureInfo*) const;
	#endif

	#ifdef SK_DIRECT3D
	// If the backend API is Direct3D, copies a snapshot of the GrD3DTextureResourceInfo struct into
	// the passed in pointer and returns true. This snapshot will set the fResourceState to the
	// current resource state. Otherwise returns false if the backend API is not D3D.
	bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const;

	// Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this
	// GrBackendTexture, they must call this function to notify Skia of the changed layout.
	void setD3DResourceState(GrD3DResourceStateEnum);
	#endif

	// Get the GrBackendFormat for this texture (or an invalid format if this is not valid).
	GrBackendFormat getBackendFormat() const;

	// If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not Mock.
	bool getMockTextureInfo(GrMockTextureInfo*) const;

	// If the client changes any of the mutable backend of the GrBackendTexture they should call
	// this function to inform Skia that those values have changed. The backend API specific state
	// that can be set from this function are:
	//
	// Vulkan: VkImageLayout and QueueFamilyIndex
	void setMutableState(const skgpu::MutableTextureState&);

	// Returns true if we are working with protected content.
	bool isProtected() const;

	// Returns true if the backend texture has been initialized.
	bool isValid() const { return fIsValid; }

	// Returns true if both textures are valid and refer to the same API texture.
	bool isSameTexture(const GrBackendTexture&);

	#if GR_TEST_UTILS
	static bool TestingOnly_Equals(const GrBackendTexture& , const GrBackendTexture&);
	#endif

	private:
	friend class GrVkGpu; // for getMutableState
	sk_sp<skgpu::MutableTextureStateRef> getMutableState() const;

	#ifdef SK_GL
	friend class GrGLTexture;
	friend class GrGLGpu; // for getGLTextureParams
	GrBackendTexture(int width,
	int height,
	GrMipmapped,
	const GrGLTextureInfo,
	sk_sp<GrGLTextureParameters>,
	std::string_view label = {});
	sk_sp<GrGLTextureParameters> getGLTextureParams() const;
	#endif

	#ifdef SK_VULKAN
	friend class GrVkTexture;
	GrBackendTexture(int width,
	int height,
	const GrVkImageInfo& vkInfo,
	sk_sp<skgpu::MutableTextureStateRef> mutableState,
	std::string_view label = {});
	#endif

	#ifdef SK_DIRECT3D
	friend class GrD3DTexture;
	friend class GrD3DGpu; // for getGrD3DResourceState
	GrBackendTexture(int width,
	int height,
	const GrD3DTextureResourceInfo& vkInfo,
	sk_sp<GrD3DResourceState> state,
	std::string_view label = {});
	sk_sp<GrD3DResourceState> getGrD3DResourceState() const;
	#endif

	// Free and release and resources being held by the GrBackendTexture.
	void cleanup();

	bool fIsValid;
	int fWidth; //<! width in pixels
	int fHeight; //<! height in pixels
	const std::string fLabel;
	GrMipmapped fMipmapped;
	GrBackendApi fBackend;
	GrTextureType fTextureType;

	union {
	#ifdef SK_GL
	GrGLBackendTextureInfo fGLInfo;
	#endif
	#ifdef SK_VULKAN
	GrVkBackendSurfaceInfo fVkInfo;
	#endif
	GrMockTextureInfo fMockInfo;
	#ifdef SK_DIRECT3D
	GrD3DBackendSurfaceInfo fD3DInfo;
	#endif
	};
	#ifdef SK_METAL
	GrMtlTextureInfo fMtlInfo;
	#endif
	#ifdef SK_DAWN
	GrDawnTextureInfo fDawnInfo;
	#endif

	sk_sp<skgpu::MutableTextureStateRef> fMutableState;
	};

	class SK_API GrBackendRenderTarget {
	public:
	// Creates an invalid backend texture.
	GrBackendRenderTarget();

	#ifdef SK_GL
	// The GrGLTextureInfo must have a valid fFormat. If wrapping in an SkSurface we require the
	// stencil bits to be either 0, 8 or 16.
	GrBackendRenderTarget(int width,
	int height,
	int sampleCnt,
	int stencilBits,
	const GrGLFramebufferInfo& glInfo);
	#endif

	#ifdef SK_DAWN
	// If wrapping in an SkSurface we require the stencil bits to be either 0, 8 or 16.
	GrBackendRenderTarget(int width,
	int height,
	int sampleCnt,
	int stencilBits,
	const GrDawnRenderTargetInfo& dawnInfo);
	#endif

	#ifdef SK_VULKAN
	/** Deprecated. Sample count is now part of GrVkImageInfo. */
	GrBackendRenderTarget(int width, int height, int sampleCnt, const GrVkImageInfo& vkInfo);

	GrBackendRenderTarget(int width, int height, const GrVkImageInfo& vkInfo);
	#endif

	#ifdef SK_METAL
	GrBackendRenderTarget(int width,
	int height,
	const GrMtlTextureInfo& mtlInfo);
	/** Deprecated. Sample count is ignored and is instead retrieved from the MtlTexture. */
	GrBackendRenderTarget(int width,
	int height,
	int sampleCnt,
	const GrMtlTextureInfo& mtlInfo);
	#endif

	#ifdef SK_DIRECT3D
	GrBackendRenderTarget(int width,
	int height,
	const GrD3DTextureResourceInfo& d3dInfo);
	#endif

	GrBackendRenderTarget(int width,
	int height,
	int sampleCnt,
	int stencilBits,
	const GrMockRenderTargetInfo& mockInfo);

	~GrBackendRenderTarget();

	GrBackendRenderTarget(const GrBackendRenderTarget& that);
	GrBackendRenderTarget& operator=(const GrBackendRenderTarget&);

	SkISize dimensions() const { return {fWidth, fHeight}; }
	int width() const { return fWidth; }
	int height() const { return fHeight; }
	int sampleCnt() const { return fSampleCnt; }
	int stencilBits() const { return fStencilBits; }
	GrBackendApi backend() const {return fBackend; }
	bool isFramebufferOnly() const { return fFramebufferOnly; }

	#ifdef SK_GL
	// If the backend API is GL, copies a snapshot of the GrGLFramebufferInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not GL.
	bool getGLFramebufferInfo(GrGLFramebufferInfo*) const;
	#endif

	#ifdef SK_DAWN
	// If the backend API is Dawn, copies a snapshot of the GrDawnRenderTargetInfo struct into the
	// passed-in pointer and returns true. Otherwise returns false if the backend API is not Dawn.
	bool getDawnRenderTargetInfo(GrDawnRenderTargetInfo*) const;
	#endif

	#ifdef SK_VULKAN
	// If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed
	// in pointer and returns true. This snapshot will set the fImageLayout to the current layout
	// state. Otherwise returns false if the backend API is not Vulkan.
	bool getVkImageInfo(GrVkImageInfo*) const;

	// Anytime the client changes the VkImageLayout of the VkImage captured by this
	// GrBackendRenderTarget, they must call this function to notify Skia of the changed layout.
	void setVkImageLayout(VkImageLayout);
	#endif

	#ifdef SK_METAL
	// If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not Metal.
	bool getMtlTextureInfo(GrMtlTextureInfo*) const;
	#endif

	#ifdef SK_DIRECT3D
	// If the backend API is Direct3D, copies a snapshot of the GrMtlTextureInfo struct into the
	// passed in pointer and returns true. Otherwise returns false if the backend API is not D3D.
	bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const;

	// Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this
	// GrBackendTexture, they must call this function to notify Skia of the changed layout.
	void setD3DResourceState(GrD3DResourceStateEnum);
	#endif

	// Get the GrBackendFormat for this render target (or an invalid format if this is not valid).
	GrBackendFormat getBackendFormat() const;

	// If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed
	// in pointer and returns true. Otherwise returns false if the backend API is not Mock.
	bool getMockRenderTargetInfo(GrMockRenderTargetInfo*) const;

	// If the client changes any of the mutable backend of the GrBackendTexture they should call
	// this function to inform Skia that those values have changed. The backend API specific state
	// that can be set from this function are:
	//
	// Vulkan: VkImageLayout and QueueFamilyIndex
	void setMutableState(const skgpu::MutableTextureState&);

	// Returns true if we are working with protected content.
	bool isProtected() const;

	// Returns true if the backend texture has been initialized.
	bool isValid() const { return fIsValid; }


	#if GR_TEST_UTILS
	static bool TestingOnly_Equals(const GrBackendRenderTarget&, const GrBackendRenderTarget&);
	#endif

	private:
	friend class GrVkGpu; // for getMutableState
	sk_sp<skgpu::MutableTextureStateRef> getMutableState() const;

	#ifdef SK_VULKAN
	friend class GrVkRenderTarget;
	GrBackendRenderTarget(int width,
	int height,
	const GrVkImageInfo& vkInfo,
	sk_sp<skgpu::MutableTextureStateRef> mutableState);
	#endif

	#ifdef SK_DIRECT3D
	friend class GrD3DGpu;
	friend class GrD3DRenderTarget;
	GrBackendRenderTarget(int width,
	int height,
	const GrD3DTextureResourceInfo& d3dInfo,
	sk_sp<GrD3DResourceState> state);
	sk_sp<GrD3DResourceState> getGrD3DResourceState() const;
	#endif

	// Free and release and resources being held by the GrBackendTexture.
	void cleanup();

	bool fIsValid;
	bool fFramebufferOnly = false;
	int fWidth; //<! width in pixels
	int fHeight; //<! height in pixels

	int fSampleCnt;
	int fStencilBits;

	GrBackendApi fBackend;

	union {
	#ifdef SK_GL
	GrGLFramebufferInfo fGLInfo;
	#endif
	#ifdef SK_VULKAN
	GrVkBackendSurfaceInfo fVkInfo;
	#endif
	GrMockRenderTargetInfo fMockInfo;
	#ifdef SK_DIRECT3D
	GrD3DBackendSurfaceInfo fD3DInfo;
	#endif
	};
	#ifdef SK_METAL
	GrMtlTextureInfo fMtlInfo;
	#endif
	#ifdef SK_DAWN
	GrDawnRenderTargetInfo fDawnInfo;
	#endif
	sk_sp<skgpu::MutableTextureStateRef> fMutableState;
	};

	#endif

	#endif