kc3-lang/angle/src/compiler/translator/ExtensionBehavior.h

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• Hash : 17b3c2f3
  Author :
  Date : 2019-10-14T14:13:59
  

  Implement SamplerVideoWEBGL for WEBGL_video_texture extension on desktop
  
  WEBGL_video_texture is an extension that will improve uploading video frame to WebGL performance.
  (https://www.khronos.org/registry/webgl/extensions/proposals/WEBGL_video_texture/)
  
  This extension introduced a new texture type TEXTURE_VIDEO_IMAGE_WEBGL and a new sampler type
  samplerVideoWEBGL to sample it.
  
  In chromium implementation, TEXTURE_VIDEO_IMAGE_WEBGL maps to different native texture type
  based on platform. On desktop, it maps to GL_TEXTURE2D(Currently supported). On Android, it
  should map to GL_TEXTURE_EXTERNAL(TODO). SamplerVideoWEBGL needs to be mapped to sampler2D or
  samplerExternalOES according to TEXTURE_VIDEO_IMAGE_WEBGL implementation.
  
  This patch implements samplerVideoWEBGL in Angle to support WEBGL_video_texture on desktop. In
  this case, samplerVideoWEBGL should map to sampler2D.
  
  Bug: chromium:776222, angleproject:3889
  Change-Id: Idb0a5fcde37ca75ccc1181226b91f257212e7500
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1866274
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/compiler/translator/ExtensionBehavior.h

• //
  // Copyright 2002 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.
  //
  // ExtensionBehavior.h: Extension name enumeration and data structures for storing extension
  // behavior.
  
  #ifndef COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  #define COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  
  #include <map>
  
  namespace sh
  {
  
  enum class TExtension
  {
      UNDEFINED,  // Special value used to indicate no extension.
  
      ARB_texture_rectangle,
      ANGLE_texture_multisample,
      ARM_shader_framebuffer_fetch,
      EXT_blend_func_extended,
      EXT_draw_buffers,
      EXT_frag_depth,
      EXT_geometry_shader,
      EXT_gpu_shader5,
      EXT_shader_framebuffer_fetch,
      EXT_shader_texture_lod,
      EXT_YUV_target,
      NV_EGL_stream_consumer_external,
      NV_shader_framebuffer_fetch,
      OES_EGL_image_external,
      OES_EGL_image_external_essl3,
      OES_standard_derivatives,
      OES_texture_storage_multisample_2d_array,
      OES_texture_3D,
      OVR_multiview,
      OVR_multiview2,
      ANGLE_multi_draw,
      ANGLE_base_vertex_base_instance,
      WEBGL_video_texture,
  };
  
  enum TBehavior
  {
      EBhRequire,
      EBhEnable,
      EBhWarn,
      EBhDisable,
      EBhUndefined
  };
  
  const char *GetExtensionNameString(TExtension extension);
  TExtension GetExtensionByName(const char *extension);
  
  const char *GetBehaviorString(TBehavior b);
  
  // Mapping between extension id and behavior.
  typedef std::map<TExtension, TBehavior> TExtensionBehavior;
  
  bool IsExtensionEnabled(const TExtensionBehavior &extBehavior, TExtension extension);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  

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