kc3-lang/angle/src/libANGLE/renderer/vulkan/vk_format_utils.h

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• Hash : 76bd848c
  Author :
  Date : 2019-02-13T13:00:44
  

  Vulkan: Support ETC, S3TC and BPTC compressed textures
  
  Fixes the format table so the correct Vulkan format for the types are
  generated.  Additionally, implements CHROMIUM_copy_compressed_texture as
  well as other functions relevant to initializing compressed textures.
  
  Bug: angleproject:2670, angleproject:2904
  Change-Id: I682d36574262525027cddf8f329515f38cd77dc0
  Reviewed-on: https://chromium-review.googlesource.com/c/1468048
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@google.com>
  

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• src/libANGLE/renderer/vulkan/vk_format_utils.h

• //
  // Copyright 2016 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.
  //
  // vk_format_utils:
  //   Helper for Vulkan format code.
  
  #ifndef LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_
  #define LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_
  
  #include <vulkan/vulkan.h>
  
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/Format.h"
  #include "libANGLE/renderer/copyvertex.h"
  #include "libANGLE/renderer/renderer_utils.h"
  #include "platform/FeaturesVk.h"
  
  #include <array>
  
  namespace gl
  {
  struct SwizzleState;
  class TextureCapsMap;
  }  // namespace gl
  
  namespace rx
  {
  class RendererVk;
  
  namespace vk
  {
  // VkFormat values in range [0, kNumVkFormats) are used as indices in various tables.
  constexpr uint32_t kNumVkFormats = 185;
  
  struct TextureFormatInitInfo final
  {
      angle::FormatID format;
      VkFormat vkFormat;
      InitializeTextureDataFunction initializer;
  };
  
  struct BufferFormatInitInfo final
  {
      angle::FormatID format;
      VkFormat vkFormat;
      bool vkFormatIsPacked;
      VertexCopyFunction vertexLoadFunction;
      bool vertexLoadRequiresConversion;
  };
  
  struct Format final : private angle::NonCopyable
  {
      Format();
  
      bool valid() const { return internalFormat != 0; }
  
      // This is an auto-generated method in vk_format_table_autogen.cpp.
      void initialize(RendererVk *renderer, const angle::Format &angleFormat);
  
      void initTextureFallback(RendererVk *renderer, const TextureFormatInitInfo *info, int numInfo);
      void initBufferFallback(RendererVk *renderer, const BufferFormatInitInfo *info, int numInfo);
  
      const angle::Format &angleFormat() const { return angle::Format::Get(angleFormatID); }
      const angle::Format &textureFormat() const { return angle::Format::Get(textureFormatID); }
      const angle::Format &bufferFormat() const { return angle::Format::Get(bufferFormatID); }
  
      // Get buffer alignment for image-copy operations (to or from a buffer).
      const gl::InternalFormat &getInternalFormatInfo(GLenum type) const
      {
          return gl::GetInternalFormatInfo(internalFormat, type);
      }
      size_t getImageCopyBufferAlignment() const;
  
      angle::FormatID angleFormatID;
      GLenum internalFormat;
      angle::FormatID textureFormatID;
      VkFormat vkTextureFormat;
      angle::FormatID bufferFormatID;
      VkFormat vkBufferFormat;
      InitializeTextureDataFunction textureInitializerFunction;
      LoadFunctionMap textureLoadFunctions;
      VertexCopyFunction vertexLoadFunction;
  
      bool vertexLoadRequiresConversion;
      bool vkBufferFormatIsPacked;
      bool vkSupportsStorageBuffer;
      bool vkFormatIsInt;
      bool vkFormatIsUnsigned;
  };
  
  bool operator==(const Format &lhs, const Format &rhs);
  bool operator!=(const Format &lhs, const Format &rhs);
  
  class FormatTable final : angle::NonCopyable
  {
    public:
      FormatTable();
      ~FormatTable();
  
      // Also initializes the TextureCapsMap and the compressedTextureCaps in the Caps instance.
      void initialize(RendererVk *renderer,
                      gl::TextureCapsMap *outTextureCapsMap,
                      std::vector<GLenum> *outCompressedTextureFormats);
  
      ANGLE_INLINE const Format &operator[](GLenum internalFormat) const
      {
          angle::FormatID formatID = angle::Format::InternalFormatToID(internalFormat);
          return mFormatData[static_cast<size_t>(formatID)];
      }
  
      ANGLE_INLINE const Format &operator[](angle::FormatID formatID) const
      {
          return mFormatData[static_cast<size_t>(formatID)];
      }
  
    private:
      // The table data is indexed by angle::FormatID.
      std::array<Format, angle::kNumANGLEFormats> mFormatData;
  };
  
  // This will return a reference to a VkFormatProperties with the feature flags supported
  // if the format is a mandatory format described in section 31.3.3. Required Format Support
  // of the Vulkan spec. If the vkFormat isn't mandatory, it will return a VkFormatProperties
  // initialized to 0.
  const VkFormatProperties &GetMandatoryFormatSupport(VkFormat vkFormat);
  
  }  // namespace vk
  
  // Checks if a vkFormat supports all the features needed to use it as a GL texture format
  bool HasFullTextureFormatSupport(RendererVk *renderer, VkFormat vkFormat);
  
  // Returns the alignment for a buffer to be used with the vertex input stage in Vulkan. This
  // calculation is listed in the Vulkan spec at the end of the section 'Vertex Input Description'.
  size_t GetVertexInputAlignment(const vk::Format &format);
  
  void MapSwizzleState(const vk::Format &format,
                       const gl::SwizzleState &swizzleState,
                       gl::SwizzleState *swizzleStateOut);
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_VULKAN_VK_FORMAT_UTILS_H_
  

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