kc3-lang/angle/src/tests/compiler_tests/SamplerVideoWEBGL_test.cpp

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• Author : Yan
  Date : 2019-10-14 14:13:59
  Hash : 17b3c2f3
  Message : 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>

• src/tests/compiler_tests/SamplerVideoWEBGL_test.cpp

• //
  // Copyright 2019 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.
  //
  // samplerVideoWEBGL_test.cpp:
  // Tests compiling shaders that use samplerVideoWEBGL types
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/ShaderCompileTreeTest.h"
  
  using namespace sh;
  
  class SamplerVideoWEBGLTest : public ShaderCompileTreeTest
  {
    public:
      SamplerVideoWEBGLTest() {}
  
      void initResources(ShBuiltInResources *resources) override
      {
          resources->WEBGL_video_texture = 1;
      }
  
    protected:
      ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; }
      ShShaderSpec getShaderSpec() const override { return SH_GLES3_1_SPEC; }
  };
  
  // Checks whether compiler returns error when extension isn't enabled but samplerVideoWEBGL is
  // used in shader.
  TEST_F(SamplerVideoWEBGLTest, UsingSamplerVideoWEBGLWithoutWEBGLVideoTextureExtensionRequired)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform mediump samplerVideoWEBGL s;\n"
          "void main()\n"
          "{\n"
          "    gl_FragColor = textureVideoWEBGL(s, vec2(0.0, 0.0));\n"
          "}\n";
  
      if (compile(shaderString))
      {
          FAIL() << "Shader compilation passed, expecting fail:\n" << mInfoLog;
      }
  }
  
  // Checks whether compiler returns error when extension isn't enabled but use samplerVideoWEBGL is
  // used in ES300 shader.
  TEST_F(SamplerVideoWEBGLTest,
         UsingSamplerVideoWEBGLWithoutWEBGLVideoTextureExtensionRequiredInES300)
  {
      const std::string &shaderString =
          "#version 300 es"
          "precision mediump float;\n"
          "uniform mediump samplerVideoWEBGL s;\n"
          "out vec4 my_FragColor;\n"
          "void main()\n"
          "{\n"
          "   my_FragColor = texture(s, vec2(0.0, 0.0));\n"
          "}\n";
  
      if (compile(shaderString))
      {
          FAIL() << "Shader compilation passed, expecting fail:\n" << mInfoLog;
      }
  }
  
  // Checks whether compiler can support samplerVideoWEBGL as texture2D parameter.
  TEST_F(SamplerVideoWEBGLTest, SamplerVideoWEBGLCanBeSupportedInTexture2D)
  {
      const std::string &shaderString =
          "#extension GL_WEBGL_video_texture : require\n"
          "precision mediump float;\n"
          "uniform mediump samplerVideoWEBGL s;\n"
          "void main()\n"
          "{\n"
          "    gl_FragColor = textureVideoWEBGL(s, vec2(0.0, 0.0));\n"
          "}\n";
  
      if (!compile(shaderString))
      {
          FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog;
      }
  }
  
  // Checks whether compiler can support samplerVideoWEBGL as texture parameter in ES300.
  TEST_F(SamplerVideoWEBGLTest, SamplerVideoWEBGLCanBeSupportedInTextureInES300)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "#extension GL_WEBGL_video_texture : require\n"
          "precision mediump float;\n"
          "uniform mediump samplerVideoWEBGL s;\n"
          "out vec4 my_FragColor;\n"
          "void main()\n"
          "{\n"
          "    my_FragColor = texture(s, vec2(0.0, 0.0));\n"
          "}\n";
  
      if (!compile(shaderString))
      {
          FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog;
      }
  }