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

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• Hash : 5cbaa3f8
  Author :
  Date : 2019-05-07T15:49:22
  

  Don't inherit ANGLETest SetUp and TearDown.
  
  Instead of inheriting from testing::Test's SetUp and TearDown we add
  new methods 'testSetUp' and 'testTearDown'. This helps prevent a common
  error of forgetting to call the base class method.
  
  Also add a check in the ANGLETest destructor that SetUp and TearDown
  have been called.
  
  Bug: angleproject:3393
  Change-Id: Iab211305cc06ffea9ca649e864ddc9b180f2cba0
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1593960
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/tests/gl_tests/IndexBufferOffsetTest.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.
  //
  
  // IndexBufferOffsetTest.cpp: Test glDrawElements with an offset and an index buffer
  
  #include "test_utils/ANGLETest.h"
  #include "util/system_utils.h"
  
  using namespace angle;
  
  class IndexBufferOffsetTest : public ANGLETest
  {
    protected:
      IndexBufferOffsetTest()
      {
          setWindowWidth(128);
          setWindowHeight(128);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
      }
  
      void testSetUp() override
      {
          constexpr char kVS[] =
              R"(precision highp float;
              attribute vec2 position;
  
              void main()
              {
                  gl_Position = vec4(position, 0.0, 1.0);
              })";
  
          constexpr char kFS[] =
              R"(precision highp float;
              uniform vec4 color;
  
              void main()
              {
                  gl_FragColor = color;
              })";
  
          mProgram = CompileProgram(kVS, kFS);
          ASSERT_NE(0u, mProgram);
  
          mColorUniformLocation      = glGetUniformLocation(mProgram, "color");
          mPositionAttributeLocation = glGetAttribLocation(mProgram, "position");
  
          const GLfloat vertices[] = {-1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f};
          glGenBuffers(1, &mVertexBuffer);
          glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
          glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), &vertices[0], GL_STATIC_DRAW);
  
          glGenBuffers(1, &mIndexBuffer);
          glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
      }
  
      void testTearDown() override
      {
          glDeleteBuffers(1, &mVertexBuffer);
          glDeleteBuffers(1, &mIndexBuffer);
          glDeleteProgram(mProgram);
      }
  
      void runTest(GLenum type, int typeWidth, void *indexData)
      {
          glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
          glClear(GL_COLOR_BUFFER_BIT);
  
          GLuint nullIndexData[] = {0, 0, 0, 0, 0, 0};
  
          size_t indexDataWidth = 6 * typeWidth;
  
          glBufferData(GL_ELEMENT_ARRAY_BUFFER, 3 * indexDataWidth, nullptr, GL_DYNAMIC_DRAW);
          glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, indexDataWidth, nullIndexData);
          glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexDataWidth, indexData);
          glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 2 * indexDataWidth, indexDataWidth, nullIndexData);
  
          glUseProgram(mProgram);
  
          glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
          glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
          glEnableVertexAttribArray(mPositionAttributeLocation);
  
          glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
  
          for (int i = 0; i < 16; i++)
          {
              glDrawElements(GL_TRIANGLES, 6, type, reinterpret_cast<void *>(indexDataWidth));
              EXPECT_PIXEL_EQ(64, 64, 255, 0, 0, 255);
          }
  
          glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexDataWidth, nullIndexData);
          glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 2 * indexDataWidth, indexDataWidth, indexData);
  
          glUniform4f(mColorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
          glDrawElements(GL_TRIANGLES, 6, type, reinterpret_cast<void *>(indexDataWidth * 2));
          EXPECT_PIXEL_EQ(64, 64, 0, 255, 0, 255);
  
          EXPECT_GL_NO_ERROR();
          swapBuffers();
      }
  
      GLuint mProgram;
      GLint mColorUniformLocation;
      GLint mPositionAttributeLocation;
      GLuint mVertexBuffer;
      GLuint mIndexBuffer;
  };
  
  // Test using an offset for an UInt8 index buffer
  TEST_P(IndexBufferOffsetTest, UInt8Index)
  {
      GLubyte indexData[] = {0, 1, 2, 1, 2, 3};
      runTest(GL_UNSIGNED_BYTE, 1, indexData);
  }
  
  // Test using an offset for an UInt16 index buffer
  TEST_P(IndexBufferOffsetTest, UInt16Index)
  {
      // TODO(jie.a.chen@intel.com): Re-enable the test once the driver fix is
      // available in public release.
      // http://anglebug.com/2663
      ANGLE_SKIP_TEST_IF(IsIntel() && IsVulkan());
  
      GLushort indexData[] = {0, 1, 2, 1, 2, 3};
      runTest(GL_UNSIGNED_SHORT, 2, indexData);
  }
  
  // Test using an offset for an UInt32 index buffer
  TEST_P(IndexBufferOffsetTest, UInt32Index)
  {
      ANGLE_SKIP_TEST_IF(getClientMajorVersion() < 3 &&
                         !IsGLExtensionEnabled("GL_OES_element_index_uint"));
  
      GLuint indexData[] = {0, 1, 2, 1, 2, 3};
      runTest(GL_UNSIGNED_INT, 4, indexData);
  }
  
  // Uses index buffer offset and 2 drawElement calls one of the other, makes sure the second
  // drawElement call will use the correct offset.
  TEST_P(IndexBufferOffsetTest, DrawAtDifferentOffsets)
  {
      GLushort indexData[] = {0, 1, 2, 1, 2, 3};
      glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
  
      size_t indexDataWidth = 6 * sizeof(GLushort);
  
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexData, GL_DYNAMIC_DRAW);
      glUseProgram(mProgram);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
      glEnableVertexAttribArray(mPositionAttributeLocation);
  
      glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
  
      glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, 0);
      glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
                     reinterpret_cast<void *>(indexDataWidth / 2));
  
      // Check the upper left triangle
      EXPECT_PIXEL_COLOR_EQ(0, getWindowHeight() / 4, GLColor::red);
  
      // Check the down right triangle
      EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::red);
  
      EXPECT_GL_NO_ERROR();
  }
  
  // Uses index buffer offset and 2 drawElement calls one of the other with different counts,
  // makes sure the second drawElement call will have its data available.
  TEST_P(IndexBufferOffsetTest, DrawWithDifferentCountsSameOffset)
  {
      GLubyte indexData[] = {99, 0, 1, 2, 1, 2, 3};
      glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
      glClear(GL_COLOR_BUFFER_BIT);
  
      size_t indexDataWidth = 7 * sizeof(GLubyte);
  
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexDataWidth, indexData, GL_DYNAMIC_DRAW);
      glUseProgram(mProgram);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glVertexAttribPointer(mPositionAttributeLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
      glEnableVertexAttribArray(mPositionAttributeLocation);
  
      glUniform4f(mColorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
  
      // The first draw draws the first triangle, and the second draws a quad.
      glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_BYTE, reinterpret_cast<void *>(1));
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, reinterpret_cast<void *>(1));
  
      // Check the upper left triangle
      EXPECT_PIXEL_COLOR_EQ(0, getWindowHeight() / 4, GLColor::red);
  
      // Check the down right triangle
      EXPECT_PIXEL_COLOR_EQ(getWindowWidth() - 1, getWindowHeight() - 1, GLColor::red);
  
      EXPECT_GL_NO_ERROR();
  }
  
  ANGLE_INSTANTIATE_TEST(IndexBufferOffsetTest,
                         ES2_D3D9(),
                         ES2_D3D11(),
                         ES3_D3D11(),
                         ES2_OPENGL(),
                         ES3_OPENGL(),
                         ES2_OPENGLES(),
                         ES3_OPENGLES(),
                         ES2_VULKAN());
  

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