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

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• Hash : 80cdc376
  Author :
  Date : 2017-04-18T13:27:30
  

  DisplayWGL: try all GL context version from the highest
  
  The only way to get a core profile context of the highest version using
  CreateContextAttrib is to try creationg contexts in decreasing version
  numbers. It might look that asking for a core context of version (0, 0)
  works on some driver but it create a _compatibility_ context of the highest
  version instead which might not be supported on some drivers.
  
  BUG=angleproject:1994
  
  Change-Id: Ic8a33243909c54ea5940ee81c9c866b141bea420
  Reviewed-on: https://chromium-review.googlesource.com/480739
  Commit-Queue: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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

• //
  // Copyright (c) 2012-2014 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.
  //
  
  // renderergl_utils.h: Conversion functions and other utility routines
  // specific to the OpenGL renderer.
  
  #ifndef LIBANGLE_RENDERER_GL_RENDERERGLUTILS_H_
  #define LIBANGLE_RENDERER_GL_RENDERERGLUTILS_H_
  
  #include "libANGLE/angletypes.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/Version.h"
  #include "libANGLE/renderer/driver_utils.h"
  #include "libANGLE/renderer/gl/functionsgl_typedefs.h"
  
  #include <string>
  #include <vector>
  
  namespace gl
  {
  struct Caps;
  class TextureCapsMap;
  struct Extensions;
  struct Version;
  }
  
  namespace rx
  {
  class FunctionsGL;
  struct WorkaroundsGL;
  
  VendorID GetVendorID(const FunctionsGL *functions);
  std::string GetDriverVersion(const FunctionsGL *functions);
  
  namespace nativegl_gl
  {
  
  void GenerateCaps(const FunctionsGL *functions,
                    const WorkaroundsGL &workarounds,
                    gl::Caps *caps,
                    gl::TextureCapsMap *textureCapsMap,
                    gl::Extensions *extensions,
                    gl::Version *maxSupportedESVersion);
  
  void GenerateWorkarounds(const FunctionsGL *functions, WorkaroundsGL *workarounds);
  }
  
  namespace nativegl
  {
  bool SupportsFenceSync(const FunctionsGL *functions);
  bool SupportsOcclusionQueries(const FunctionsGL *functions);
  }
  
  bool CanMapBufferForRead(const FunctionsGL *functions);
  uint8_t *MapBufferRangeWithFallback(const FunctionsGL *functions,
                                      GLenum target,
                                      size_t offset,
                                      size_t length,
                                      GLbitfield access);
  
  gl::ErrorOrResult<bool> ShouldApplyLastRowPaddingWorkaround(const gl::Extents &size,
                                                              const gl::PixelStoreStateBase &state,
                                                              GLenum format,
                                                              GLenum type,
                                                              bool is3D,
                                                              const void *pixels);
  
  struct ContextCreationTry
  {
      enum class Type
      {
          DESKTOP_CORE,
          DESKTOP_LEGACY,
          ES,
      };
  
      ContextCreationTry(EGLint displayType, Type type, gl::Version version)
          : displayType(displayType), type(type), version(version)
      {
      }
  
      EGLint displayType;
      Type type;
      gl::Version version;
  };
  
  std::vector<ContextCreationTry> GenerateContextCreationToTry(EGLint requestedType, bool isMesaGLX);
  }
  
  #endif // LIBANGLE_RENDERER_GL_RENDERERGLUTILS_H_
  

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