kc3-lang/angle/src/tests/gl_tests/DepthStencilFormatsTest.cpp

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• Author : Olli Etuaho
  Date : 2018-04-13 14:11:46
  Hash : 5804dc8e
  Message : Refactor GL tests to use a shader library Instead of having the same simple shaders repeated over and over in the test code, reuse a single shader library. BUG=angleproject:2474 TEST=angle_end2end_tests Change-Id: I13f8ca8c0125e6d30f1761639bf8c3f69e0e77d2 Reviewed-on: https://chromium-review.googlesource.com/1012078 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

• src/tests/gl_tests/DepthStencilFormatsTest.cpp

• //
  // Copyright 2015 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 "test_utils/ANGLETest.h"
  #include "test_utils/gl_raii.h"
  
  #include "common/mathutil.h"
  #include "platform/WorkaroundsD3D.h"
  
  using namespace angle;
  
  class DepthStencilFormatsTestBase : public ANGLETest
  {
    protected:
      DepthStencilFormatsTestBase()
      {
          setWindowWidth(128);
          setWindowHeight(128);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
      }
  
      bool checkTexImageFormatSupport(GLenum format, GLenum type)
      {
          EXPECT_GL_NO_ERROR();
  
          GLuint tex = 0;
          glGenTextures(1, &tex);
          glBindTexture(GL_TEXTURE_2D, tex);
          glTexImage2D(GL_TEXTURE_2D, 0, format, 1, 1, 0, format, type, nullptr);
          glDeleteTextures(1, &tex);
  
          return (glGetError() == GL_NO_ERROR);
      }
  
      bool checkTexStorageFormatSupport(GLenum internalFormat)
      {
          EXPECT_GL_NO_ERROR();
  
          GLuint tex = 0;
          glGenTextures(1, &tex);
          glBindTexture(GL_TEXTURE_2D, tex);
          glTexStorage2DEXT(GL_TEXTURE_2D, 1, internalFormat, 1, 1);
          glDeleteTextures(1, &tex);
  
          return (glGetError() == GL_NO_ERROR);
      }
  
      bool checkRenderbufferFormatSupport(GLenum internalFormat)
      {
          EXPECT_GL_NO_ERROR();
  
          GLuint rb = 0;
          glGenRenderbuffers(1, &rb);
          glBindRenderbuffer(GL_RENDERBUFFER, rb);
          glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, 1, 1);
          glDeleteRenderbuffers(1, &rb);
  
          return (glGetError() == GL_NO_ERROR);
      }
  
      virtual void SetUp()
      {
          ANGLETest::SetUp();
  
          const std::string vertexShaderSource =
              R"(precision highp float;
              attribute vec4 position;
              varying vec2 texcoord;
  
              void main()
              {
                  gl_Position = position;
                  texcoord = (position.xy * 0.5) + 0.5;
              })";
  
          const std::string fragmentShaderSource =
              R"(precision highp float;
              uniform sampler2D tex;
              varying vec2 texcoord;
  
              void main()
              {
                  gl_FragColor = texture2D(tex, texcoord);
              })";
  
          mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
          if (mProgram == 0)
          {
              FAIL() << "shader compilation failed.";
          }
  
          mTextureUniformLocation = glGetUniformLocation(mProgram, "tex");
          EXPECT_NE(-1, mTextureUniformLocation);
  
          glGenTextures(1, &mTexture);
          ASSERT_GL_NO_ERROR();
      }
  
      virtual void TearDown()
      {
          glDeleteProgram(mProgram);
          glDeleteTextures(1, &mTexture);
  
          ANGLETest::TearDown();
      }
  
      GLuint mProgram;
      GLuint mTexture;
      GLint mTextureUniformLocation;
  };
  
  class DepthStencilFormatsTest : public DepthStencilFormatsTestBase
  {};
  
  class DepthStencilFormatsTestES3 : public DepthStencilFormatsTestBase
  {};
  
  TEST_P(DepthStencilFormatsTest, DepthTexture)
  {
      bool shouldHaveTextureSupport = extensionEnabled("GL_ANGLE_depth_texture");
      EXPECT_EQ(shouldHaveTextureSupport, checkTexImageFormatSupport(GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT));
      EXPECT_EQ(shouldHaveTextureSupport, checkTexImageFormatSupport(GL_DEPTH_COMPONENT, GL_UNSIGNED_INT));
  
      if (extensionEnabled("GL_EXT_texture_storage"))
      {
          EXPECT_EQ(shouldHaveTextureSupport, checkTexStorageFormatSupport(GL_DEPTH_COMPONENT16));
          EXPECT_EQ(shouldHaveTextureSupport, checkTexStorageFormatSupport(GL_DEPTH_COMPONENT32_OES));
      }
  }
  
  TEST_P(DepthStencilFormatsTest, PackedDepthStencil)
  {
      // Expected to fail in D3D9 if GL_OES_packed_depth_stencil is not present.
      // Expected to fail in D3D11 if GL_OES_packed_depth_stencil or GL_ANGLE_depth_texture is not present.
  
      bool shouldHaveRenderbufferSupport = extensionEnabled("GL_OES_packed_depth_stencil");
      EXPECT_EQ(shouldHaveRenderbufferSupport, checkRenderbufferFormatSupport(GL_DEPTH24_STENCIL8_OES));
  
      bool shouldHaveTextureSupport = extensionEnabled("GL_OES_packed_depth_stencil") &&
                                      extensionEnabled("GL_ANGLE_depth_texture");
      EXPECT_EQ(shouldHaveTextureSupport, checkTexImageFormatSupport(GL_DEPTH_STENCIL_OES, GL_UNSIGNED_INT_24_8_OES));
  
      if (extensionEnabled("GL_EXT_texture_storage"))
      {
          EXPECT_EQ(shouldHaveTextureSupport, checkTexStorageFormatSupport(GL_DEPTH24_STENCIL8_OES));
      }
  }
  
  TEST_P(DepthStencilFormatsTestES3, DrawWithDepthStencil)
  {
      GLushort data[16];
      for (unsigned int i = 0; i < 16; i++)
      {
          data[i] = std::numeric_limits<GLushort>::max();
      }
      glBindTexture(GL_TEXTURE_2D, mTexture);
      glTexStorage2D(GL_TEXTURE_2D, 1, GL_DEPTH_COMPONENT16, 4, 4);
      glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 4, 4, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, data);
  
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  
      glUseProgram(mProgram);
      glUniform1i(mTextureUniformLocation, 0);
  
      glClear(GL_COLOR_BUFFER_BIT);
      drawQuad(mProgram, "position", 0.5f);
  
      ASSERT_GL_NO_ERROR();
  
      GLubyte pixel[4];
      glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixel);
  
      // Only require the red and alpha channels have the correct values, the depth texture extensions
      // leave the green and blue channels undefined
      ASSERT_NEAR(255, pixel[0], 2.0);
      ASSERT_EQ(255, pixel[3]);
  }
  
  // This test reproduces a driver bug on Intel windows platforms on driver version
  // from 4815 to 4901.
  // When rendering with Stencil buffer enabled and depth buffer disabled, large
  // viewport will lead to memory leak and driver crash. And the pixel result
  // is a random value.
  TEST_P(DepthStencilFormatsTestES3, DrawWithLargeViewport)
  {
      ANGLE_SKIP_TEST_IF(IsIntel() && (IsOSX() || IsWindows()));
  
      ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
  
      glEnable(GL_STENCIL_TEST);
      glDisable(GL_DEPTH_TEST);
  
      // The iteration is to reproduce memory leak when rendering several times.
      for (int i = 0; i < 10; ++i)
      {
          // Create offscreen fbo and its color attachment and depth stencil attachment.
          GLTexture framebufferColorTexture;
          glBindTexture(GL_TEXTURE_2D, framebufferColorTexture);
          glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, getWindowWidth(), getWindowHeight());
          ASSERT_GL_NO_ERROR();
  
          GLTexture framebufferStencilTexture;
          glBindTexture(GL_TEXTURE_2D, framebufferStencilTexture);
          glTexStorage2D(GL_TEXTURE_2D, 1, GL_DEPTH24_STENCIL8, getWindowWidth(), getWindowHeight());
          ASSERT_GL_NO_ERROR();
  
          GLFramebuffer fb;
          glBindFramebuffer(GL_FRAMEBUFFER, fb);
          glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                 framebufferColorTexture, 0);
          glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
                                 framebufferStencilTexture, 0);
  
          EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
          ASSERT_GL_NO_ERROR();
  
          GLint kStencilRef = 4;
          glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
          glStencilFunc(GL_ALWAYS, kStencilRef, 0xFF);
  
          float viewport[2];
          glGetFloatv(GL_MAX_VIEWPORT_DIMS, viewport);
  
          glViewport(0, 0, viewport[0], viewport[1]);
          glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
  
          drawQuad(program.get(), essl1_shaders::PositionAttrib(), 0.0f);
          ASSERT_GL_NO_ERROR();
  
          glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
          EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
          ASSERT_GL_NO_ERROR();
      }
  }
  
  // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
  ANGLE_INSTANTIATE_TEST(DepthStencilFormatsTest,
                         ES2_D3D9(),
                         ES2_D3D11(),
                         ES2_OPENGL(),
                         ES2_OPENGLES(),
                         ES2_VULKAN());
  ANGLE_INSTANTIATE_TEST(DepthStencilFormatsTestES3, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
  
  class TinyDepthStencilWorkaroundTest : public ANGLETest
  {
    public:
      TinyDepthStencilWorkaroundTest()
      {
          setWindowWidth(512);
          setWindowHeight(512);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
      }
  
      // Override the workarounds to enable "tiny" depth/stencil textures.
      void overrideWorkaroundsD3D(WorkaroundsD3D *workarounds) override
      {
          workarounds->emulateTinyStencilTextures = true;
      }
  };
  
  // Tests that the tiny depth stencil textures workaround does not "stick" depth textures.
  // http://anglebug.com/1664
  TEST_P(TinyDepthStencilWorkaroundTest, DepthTexturesStick)
  {
      const std::string &drawVS =
          "#version 100\n"
          "attribute vec3 vertex;\n"
          "void main () {\n"
          "  gl_Position = vec4(vertex.x, vertex.y, vertex.z * 2.0 - 1.0, 1);\n"
          "}\n";
  
      ANGLE_GL_PROGRAM(drawProgram, drawVS, essl1_shaders::fs::Red());
  
      const std::string &blitVS =
          "#version 100\n"
          "attribute vec2 vertex;\n"
          "varying vec2 position;\n"
          "void main () {\n"
          "  position = vertex * .5 + .5;\n"
          "  gl_Position = vec4(vertex, 0, 1);\n"
          "}\n";
  
      const std::string &blitFS =
          "#version 100\n"
          "precision mediump float;\n"
          "uniform sampler2D texture;\n"
          "varying vec2 position;\n"
          "void main () {\n"
          "  gl_FragColor = vec4 (texture2D (texture, position).rrr, 1.);\n"
          "}\n";
  
      ANGLE_GL_PROGRAM(blitProgram, blitVS, blitFS);
  
      GLint blitTextureLocation = glGetUniformLocation(blitProgram.get(), "texture");
      ASSERT_NE(-1, blitTextureLocation);
  
      GLTexture colorTex;
      glBindTexture(GL_TEXTURE_2D, colorTex.get());
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, getWindowWidth(), getWindowHeight(), 0, GL_RGBA,
                   GL_UNSIGNED_BYTE, nullptr);
      glBindTexture(GL_TEXTURE_2D, 0);
  
      GLTexture depthTex;
      glBindTexture(GL_TEXTURE_2D, depthTex.get());
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
      ASSERT_EQ(getWindowWidth(), getWindowHeight());
      int levels = gl::log2(getWindowWidth());
      for (int mipLevel = 0; mipLevel <= levels; ++mipLevel)
      {
          int size = getWindowWidth() >> mipLevel;
          glTexImage2D(GL_TEXTURE_2D, mipLevel, GL_DEPTH_STENCIL, size, size, 0, GL_DEPTH_STENCIL,
                       GL_UNSIGNED_INT_24_8_OES, nullptr);
      }
  
      glBindTexture(GL_TEXTURE_2D, 0);
  
      ASSERT_GL_NO_ERROR();
  
      GLFramebuffer framebuffer;
      glBindFramebuffer(GL_FRAMEBUFFER, framebuffer.get());
  
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTex.get(), 0);
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTex.get(), 0);
  
      ASSERT_GL_NO_ERROR();
  
      glDepthRangef(0.0f, 1.0f);
      glViewport(0, 0, getWindowWidth(), getWindowHeight());
      glClearColor(0, 0, 0, 1);
  
      // Draw loop.
      for (unsigned int frame = 0; frame < 3; ++frame)
      {
          // draw into FBO
          glBindFramebuffer(GL_FRAMEBUFFER, framebuffer.get());
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
  
          glEnable(GL_DEPTH_TEST);
  
          float depth = ((frame % 2 == 0) ? 0.0f : 1.0f);
          drawQuad(drawProgram.get(), "vertex", depth);
  
          glBindFramebuffer(GL_FRAMEBUFFER, 0);
  
          // blit FBO
          glDisable(GL_DEPTH_TEST);
  
          glUseProgram(blitProgram.get());
          glUniform1i(blitTextureLocation, 0);
          glBindTexture(GL_TEXTURE_2D, depthTex.get());
  
          drawQuad(blitProgram.get(), "vertex", 0.5f);
  
          Vector4 depthVec(depth, depth, depth, 1);
          GLColor depthColor(depthVec);
  
          EXPECT_PIXEL_COLOR_NEAR(0, 0, depthColor, 1);
          ASSERT_GL_NO_ERROR();
      }
  }
  
  ANGLE_INSTANTIATE_TEST(TinyDepthStencilWorkaroundTest, ES3_D3D11());