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

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• Author : Corentin Wallez
  Date : 2017-07-04 18:27:01
  Hash : 13c0dd46
  Message : Add texture rectangle extension. This is needed to support binding IOSurfaces to textures on OSX. This commit adds support in the API and tests, but didn't need to implement compiler changes as it already supported ARB_texture_rectangle. Implementation of CHROMIUM_opy_texture for rectangle texture and the spec are left for follow-up commits. Change-Id: I45c66be763a9d3f6f619640f9f95f39b05c70867 Reviewed-on: https://chromium-review.googlesource.com/559106 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

• src/tests/compiler_tests/ARB_texture_rectangle_test.cpp

• //
  // Copyright (c) 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.
  //
  // ARB_texture_rectangle_test.cpp:
  //   Test for the ARB_texture_rectangle extension
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/ShaderCompileTreeTest.h"
  
  using namespace sh;
  
  class ARBTextureRectangleTestNoExt : public ShaderCompileTreeTest
  {
    protected:
      ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; }
      ShShaderSpec getShaderSpec() const override { return SH_GLES3_SPEC; }
  };
  
  class ARBTextureRectangleTest : public ARBTextureRectangleTestNoExt
  {
    protected:
      void initResources(ShBuiltInResources *resources) override
      {
          resources->ARB_texture_rectangle = 1;
      }
  };
  
  // Check that new types and builtins are disallowed if the extension isn't present in the translator
  // resources
  TEST_F(ARBTextureRectangleTest, NewTypeAndBuiltinsWithoutTranslatorResourceExtension)
  {
      // The new builtins require Sampler2DRect so we can't test them independently.
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform sampler2DRect tex;\n"
          "void main() {\n"
          "}\n";
      ASSERT_TRUE(compile(shaderString));
  }
  
  // Check that new types and builtins are usable even with the #extension directive
  // Issue #15 of ARB_texture_rectangle explains that the extension was specified before the
  // #extension mechanism was in place so it doesn't require explicit enabling.
  TEST_F(ARBTextureRectangleTest, NewTypeAndBuiltinsWithoutExtensionDirective)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform sampler2DRect tex;\n"
          "void main() {\n"
          "    vec4 color = texture2DRect(tex, vec2(1.0));"
          "    color = texture2DRectProj(tex, vec3(1.0));"
          "    color = texture2DRectProj(tex, vec4(1.0));"
          "}\n";
      ASSERT_TRUE(compile(shaderString));
  }
  
  // Test valid usage of the new types and builtins
  TEST_F(ARBTextureRectangleTest, NewTypeAndBuiltingsWithExtensionDirective)
  {
      const std::string &shaderString =
          "#extension GL_ARB_texture_rectangle : require\n"
          "precision mediump float;\n"
          "uniform sampler2DRect tex;\n"
          "void main() {\n"
          "    vec4 color = texture2DRect(tex, vec2(1.0));"
          "    color = texture2DRectProj(tex, vec3(1.0));"
          "    color = texture2DRectProj(tex, vec4(1.0));"
          "}\n";
      ASSERT_TRUE(compile(shaderString));
  }
  
  // Check that it is not possible to pass a sampler2DRect where sampler2D is expected, and vice versa
  TEST_F(ARBTextureRectangleTest, Rect2DVs2DMismatch)
  {
      const std::string &shaderString1 =
          "#extension GL_ARB_texture_rectangle : require\n"
          "precision mediump float;\n"
          "uniform sampler2DRect tex;\n"
          "void main() {\n"
          "    vec4 color = texture2D(tex, vec2(1.0));"
          "}\n";
      ASSERT_FALSE(compile(shaderString1));
  
      const std::string &shaderString2 =
          "#extension GL_ARB_texture_rectangle : require\n"
          "precision mediump float;\n"
          "uniform sampler2D tex;\n"
          "void main() {\n"
          "    vec4 color = texture2DRect(tex, vec2(1.0));"
          "}\n";
      ASSERT_FALSE(compile(shaderString2));
  }