kc3-lang/angle/src/compiler/translator/Initialize.cpp

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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/Initialize.cpp

• //
  // 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.
  //
  
  #include "compiler/translator/Initialize.h"
  
  namespace sh
  {
  
  void InitExtensionBehavior(const ShBuiltInResources &resources, TExtensionBehavior &extBehavior)
  {
      if (resources.OES_standard_derivatives)
      {
          extBehavior[TExtension::OES_standard_derivatives] = EBhUndefined;
      }
      if (resources.OES_EGL_image_external)
      {
          extBehavior[TExtension::OES_EGL_image_external] = EBhUndefined;
      }
      if (resources.OES_EGL_image_external_essl3)
      {
          extBehavior[TExtension::OES_EGL_image_external_essl3] = EBhUndefined;
      }
      if (resources.NV_EGL_stream_consumer_external)
      {
          extBehavior[TExtension::NV_EGL_stream_consumer_external] = EBhUndefined;
      }
      if (resources.ARB_texture_rectangle)
      {
          // Special: ARB_texture_rectangle extension does not follow the standard for #extension
          // directives - it is enabled by default. An extension directive may still disable it.
          extBehavior[TExtension::ARB_texture_rectangle] = EBhEnable;
      }
      if (resources.EXT_blend_func_extended)
      {
          extBehavior[TExtension::EXT_blend_func_extended] = EBhUndefined;
      }
      if (resources.EXT_draw_buffers)
      {
          extBehavior[TExtension::EXT_draw_buffers] = EBhUndefined;
      }
      if (resources.EXT_frag_depth)
      {
          extBehavior[TExtension::EXT_frag_depth] = EBhUndefined;
      }
      if (resources.EXT_shader_texture_lod)
      {
          extBehavior[TExtension::EXT_shader_texture_lod] = EBhUndefined;
      }
      if (resources.EXT_shader_framebuffer_fetch)
      {
          extBehavior[TExtension::EXT_shader_framebuffer_fetch] = EBhUndefined;
      }
      if (resources.NV_shader_framebuffer_fetch)
      {
          extBehavior[TExtension::NV_shader_framebuffer_fetch] = EBhUndefined;
      }
      if (resources.ARM_shader_framebuffer_fetch)
      {
          extBehavior[TExtension::ARM_shader_framebuffer_fetch] = EBhUndefined;
      }
      if (resources.OVR_multiview)
      {
          extBehavior[TExtension::OVR_multiview] = EBhUndefined;
      }
      if (resources.OVR_multiview2)
      {
          extBehavior[TExtension::OVR_multiview2] = EBhUndefined;
      }
      if (resources.EXT_YUV_target)
      {
          extBehavior[TExtension::EXT_YUV_target] = EBhUndefined;
      }
      if (resources.EXT_geometry_shader)
      {
          extBehavior[TExtension::EXT_geometry_shader] = EBhUndefined;
      }
      if (resources.EXT_gpu_shader5)
      {
          extBehavior[TExtension::EXT_gpu_shader5] = EBhUndefined;
      }
      if (resources.OES_texture_storage_multisample_2d_array)
      {
          extBehavior[TExtension::OES_texture_storage_multisample_2d_array] = EBhUndefined;
      }
      if (resources.OES_texture_3D)
      {
          extBehavior[TExtension::OES_texture_3D] = EBhUndefined;
      }
      if (resources.ANGLE_texture_multisample)
      {
          extBehavior[TExtension::ANGLE_texture_multisample] = EBhUndefined;
      }
      if (resources.ANGLE_multi_draw)
      {
          extBehavior[TExtension::ANGLE_multi_draw] = EBhUndefined;
      }
      if (resources.ANGLE_base_vertex_base_instance)
      {
          extBehavior[TExtension::ANGLE_base_vertex_base_instance] = EBhUndefined;
      }
      if (resources.WEBGL_video_texture)
      {
          extBehavior[TExtension::WEBGL_video_texture] = EBhUndefined;
      }
  }
  
  void ResetExtensionBehavior(TExtensionBehavior &extBehavior)
  {
      for (auto &ext : extBehavior)
      {
          if (ext.first == TExtension::ARB_texture_rectangle)
          {
              ext.second = EBhEnable;
          }
          else
          {
              ext.second = EBhUndefined;
          }
      }
  }
  
  }  // namespace sh
  

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