kc3-lang/angle/src/libANGLE/renderer/gl/formatutilsgl.h

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• Hash : 81ee4d29
  Author :
  Date : 2019-12-04T17:05:11
  

  Workaround EXT_texture_norm16 for OpenGL ES drivers
  
  Implement a workaround for widespread bugs calling glReadPixels with
  RGBA/UNSIGNED_SHORT against R16/RG16 color attachments. Read back the
  data using the GL_IMPLEMENTATION_COLOR_READ_FORMAT, and then rearrange
  the read back pixels to fit the RGBA layout.
  
  Also skip RGB16/RGB16_SNORM texture sample test on Nexus 5X/Nexus 6P
  due to a another driver bug.
  
  Bug: chromium:1000354, angleproject:4214, angleproject:4215, angleproject:4245
  Change-Id: Iedea6f4136878cac5ad0dec3757c77b73502e1cd
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1952166
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Commit-Queue: Shrek Shao <shrekshao@google.com>
  

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• src/libANGLE/renderer/gl/formatutilsgl.h

• //
  // 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.
  //
  
  // formatutilsgl.h: Queries for GL image formats and their translations to native
  // GL formats.
  
  #ifndef LIBANGLE_RENDERER_GL_FORMATUTILSGL_H_
  #define LIBANGLE_RENDERER_GL_FORMATUTILSGL_H_
  
  #include <map>
  #include <string>
  #include <vector>
  
  #include "angle_gl.h"
  #include "libANGLE/Version.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  
  namespace angle
  {
  struct FeaturesGL;
  }  // namespace angle
  
  namespace rx
  {
  
  namespace nativegl
  {
  
  struct SupportRequirement
  {
      SupportRequirement();
      SupportRequirement(const SupportRequirement &other);
      ~SupportRequirement();
  
      // Version that this format became supported without extensions
      gl::Version version;
  
      // Extensions that are required if the minimum version is not met
      std::vector<std::string> versionExtensions;
  
      // Sets of extensions that are required to support this format
      // All the extensions in one of the sets have to be available for a format to be supported
      std::vector<std::vector<std::string>> requiredExtensions;
  };
  
  struct InternalFormat
  {
      InternalFormat();
      InternalFormat(const InternalFormat &other);
      ~InternalFormat();
  
      SupportRequirement texture;
      SupportRequirement filter;
      // Texture created with InternalFormat can be used in glFramebufferTexture2D
      SupportRequirement textureAttachment;
      // Renderbuffer created with InternalFormat can be used in glFramebufferRenderbuffer
      SupportRequirement renderbuffer;
  };
  const InternalFormat &GetInternalFormatInfo(GLenum internalFormat, StandardGL standard);
  
  struct TexImageFormat
  {
      GLenum internalFormat;
      GLenum format;
      GLenum type;
  };
  TexImageFormat GetTexImageFormat(const FunctionsGL *functions,
                                   const angle::FeaturesGL &features,
                                   GLenum internalFormat,
                                   GLenum format,
                                   GLenum type);
  
  struct TexSubImageFormat
  {
      GLenum format;
      GLenum type;
  };
  TexSubImageFormat GetTexSubImageFormat(const FunctionsGL *functions,
                                         const angle::FeaturesGL &features,
                                         GLenum format,
                                         GLenum type);
  
  struct CompressedTexImageFormat
  {
      GLenum internalFormat;
  };
  CompressedTexImageFormat GetCompressedTexImageFormat(const FunctionsGL *functions,
                                                       const angle::FeaturesGL &features,
                                                       GLenum internalFormat);
  
  struct CompressedTexSubImageFormat
  {
      GLenum format;
  };
  CompressedTexSubImageFormat GetCompressedSubTexImageFormat(const FunctionsGL *functions,
                                                             const angle::FeaturesGL &features,
                                                             GLenum format);
  
  struct CopyTexImageImageFormat
  {
      GLenum internalFormat;
  };
  CopyTexImageImageFormat GetCopyTexImageImageFormat(const FunctionsGL *functions,
                                                     const angle::FeaturesGL &features,
                                                     GLenum internalFormat,
                                                     GLenum framebufferType);
  
  struct TexStorageFormat
  {
      GLenum internalFormat;
  };
  TexStorageFormat GetTexStorageFormat(const FunctionsGL *functions,
                                       const angle::FeaturesGL &features,
                                       GLenum internalFormat);
  
  struct RenderbufferFormat
  {
      GLenum internalFormat;
  };
  RenderbufferFormat GetRenderbufferFormat(const FunctionsGL *functions,
                                           const angle::FeaturesGL &features,
                                           GLenum internalFormat);
  
  struct ReadPixelsFormat
  {
      GLenum format;
      GLenum type;
  };
  ReadPixelsFormat GetReadPixelsFormat(const FunctionsGL *functions,
                                       const angle::FeaturesGL &features,
                                       GLenum readAttachmentFormat,
                                       GLenum format,
                                       GLenum type);
  }  // namespace nativegl
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_GL_FORMATUTILSGL_H_
  

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