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

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• Author : Qin Jiajia
  Date : 2020-06-09 14:32:28
  Hash : 5abc0c56
  Message : Fix failures that alpha channel is not correct Previously, the alpha channel was not set which resulted the intended swapchain buffer format is B8G8R8X8_UNORM. It means that the format supports 8 bits for each color channel and 8 bits unused. However, in our test case, we expect to compare the alpha channel. So we should set alpha channel explicitly. Bug: angleproject:4575 Bug: angleproject:4576 Change-Id: Ic26ee81a6a34dc44d0ae32e3dc463e9afa16e05c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2237189 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/tests/gl_tests/DrawElementsTest.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.
  //
  // DrawElementsTest:
  //   Tests for indexed draws.
  //
  
  #include "test_utils/ANGLETest.h"
  #include "test_utils/gl_raii.h"
  
  using namespace angle;
  
  namespace
  {
  
  class DrawElementsTest : public ANGLETest
  {
    protected:
      DrawElementsTest() : mProgram(0u)
      {
          setWindowWidth(64);
          setWindowHeight(64);
          setConfigRedBits(8);
          setConfigGreenBits(8);
          setConfigBlueBits(8);
          setConfigAlphaBits(8);
      }
  
      ~DrawElementsTest()
      {
          for (GLuint indexBuffer : mIndexBuffers)
          {
              if (indexBuffer != 0)
              {
                  glDeleteBuffers(1, &indexBuffer);
              }
          }
  
          for (GLuint vertexArray : mVertexArrays)
          {
              if (vertexArray != 0)
              {
                  glDeleteVertexArrays(1, &vertexArray);
              }
          }
  
          for (GLuint vertexBuffer : mVertexBuffers)
          {
              if (vertexBuffer != 0)
              {
                  glDeleteBuffers(1, &vertexBuffer);
              }
          }
  
          if (mProgram != 0u)
          {
              glDeleteProgram(mProgram);
          }
      }
  
      std::vector<GLuint> mIndexBuffers;
      std::vector<GLuint> mVertexArrays;
      std::vector<GLuint> mVertexBuffers;
      GLuint mProgram;
  };
  
  class WebGLDrawElementsTest : public DrawElementsTest
  {
    public:
      WebGLDrawElementsTest() { setWebGLCompatibilityEnabled(true); }
  };
  
  // Test no error is generated when using client-side arrays, indices = nullptr and count = 0
  TEST_P(DrawElementsTest, ClientSideNullptrArrayZeroCount)
  {
      constexpr char kVS[] =
          "attribute vec3 a_pos;\n"
          "void main()\n"
          "{\n"
          "    gl_Position = vec4(a_pos, 1.0);\n"
          "}\n";
  
      ANGLE_GL_PROGRAM(program, kVS, essl1_shaders::fs::Blue());
  
      GLint posLocation = glGetAttribLocation(program.get(), "a_pos");
      ASSERT_NE(-1, posLocation);
      glUseProgram(program.get());
  
      const auto &vertices = GetQuadVertices();
  
      GLBuffer vertexBuffer;
      glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer.get());
      glBufferData(GL_ARRAY_BUFFER, sizeof(vertices[0]) * vertices.size(), vertices.data(),
                   GL_STATIC_DRAW);
  
      glVertexAttribPointer(posLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
      glEnableVertexAttribArray(posLocation);
      ASSERT_GL_NO_ERROR();
  
      // "If drawElements is called with a count greater than zero, and no WebGLBuffer is bound to the
      // ELEMENT_ARRAY_BUFFER binding point, an INVALID_OPERATION error is generated."
      glDrawElements(GL_TRIANGLES, 1, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_GL_ERROR(GL_INVALID_OPERATION);
  
      // count == 0 so it's fine to have no element array buffer bound.
      glDrawElements(GL_TRIANGLES, 0, GL_UNSIGNED_BYTE, nullptr);
      ASSERT_GL_NO_ERROR();
  }
  
  // Test a state desync that can occur when using a streaming index buffer in GL in concert with
  // deleting the applied index buffer.
  TEST_P(DrawElementsTest, DeletingAfterStreamingIndexes)
  {
      // Init program
      constexpr char kVS[] =
          "attribute vec2 position;\n"
          "attribute vec2 testFlag;\n"
          "varying vec2 v_data;\n"
          "void main() {\n"
          "  gl_Position = vec4(position, 0, 1);\n"
          "  v_data = testFlag;\n"
          "}";
  
      constexpr char kFS[] =
          "varying highp vec2 v_data;\n"
          "void main() {\n"
          "  gl_FragColor = vec4(v_data, 0, 1);\n"
          "}";
  
      mProgram = CompileProgram(kVS, kFS);
      ASSERT_NE(0u, mProgram);
      glUseProgram(mProgram);
  
      GLint positionLocation = glGetAttribLocation(mProgram, "position");
      ASSERT_NE(-1, positionLocation);
  
      GLint testFlagLocation = glGetAttribLocation(mProgram, "testFlag");
      ASSERT_NE(-1, testFlagLocation);
  
      mIndexBuffers.resize(3u);
      glGenBuffers(3, &mIndexBuffers[0]);
  
      mVertexArrays.resize(2);
      glGenVertexArrays(2, &mVertexArrays[0]);
  
      mVertexBuffers.resize(2);
      glGenBuffers(2, &mVertexBuffers[0]);
  
      std::vector<GLuint> indexData[2];
      indexData[0].push_back(0);
      indexData[0].push_back(1);
      indexData[0].push_back(2);
      indexData[0].push_back(2);
      indexData[0].push_back(3);
      indexData[0].push_back(0);
  
      indexData[1] = indexData[0];
      for (GLuint &item : indexData[1])
      {
          item += 4u;
      }
  
      std::vector<GLfloat> positionData = {// quad verts
                                           -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f,
                                           // Repeat position data
                                           -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f};
  
      std::vector<GLfloat> testFlagData = {// red
                                           1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
                                           // green
                                           0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f};
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[0].size(), &indexData[0][0],
                   GL_STATIC_DRAW);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[2]);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[0].size(), &indexData[0][0],
                   GL_STATIC_DRAW);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[1]);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[1].size(), &indexData[1][0],
                   GL_STATIC_DRAW);
  
      // Initialize first vertex array with second index buffer
      glBindVertexArray(mVertexArrays[0]);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[1]);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[0]);
      glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * positionData.size(), &positionData[0],
                   GL_STATIC_DRAW);
      glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(positionLocation);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[1]);
      glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * testFlagData.size(), &testFlagData[0],
                   GL_STATIC_DRAW);
      glVertexAttribPointer(testFlagLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(testFlagLocation);
  
      // Initialize second vertex array with first index buffer
      glBindVertexArray(mVertexArrays[1]);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[0]);
      glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(positionLocation);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[1]);
      glVertexAttribPointer(testFlagLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(testFlagLocation);
  
      ASSERT_GL_NO_ERROR();
  
      glBindVertexArray(mVertexArrays[0]);
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      glBindVertexArray(mVertexArrays[1]);
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
  
      glBindVertexArray(mVertexArrays[0]);
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      // Trigger the bug here.
      glDeleteBuffers(1, &mIndexBuffers[2]);
  
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test drawing to part of the indices in an index buffer, and then all of them.
  TEST_P(DrawElementsTest, PartOfIndexBufferThenAll)
  {
      // Init program
      constexpr char kVS[] =
          "attribute vec2 position;\n"
          "attribute vec2 testFlag;\n"
          "varying vec2 v_data;\n"
          "void main() {\n"
          "  gl_Position = vec4(position, 0, 1);\n"
          "  v_data = testFlag;\n"
          "}";
  
      constexpr char kFS[] =
          "varying highp vec2 v_data;\n"
          "void main() {\n"
          "  gl_FragColor = vec4(v_data, 0, 1);\n"
          "}";
  
      mProgram = CompileProgram(kVS, kFS);
      ASSERT_NE(0u, mProgram);
      glUseProgram(mProgram);
  
      GLint positionLocation = glGetAttribLocation(mProgram, "position");
      ASSERT_NE(-1, positionLocation);
  
      GLint testFlagLocation = glGetAttribLocation(mProgram, "testFlag");
      ASSERT_NE(-1, testFlagLocation);
  
      mIndexBuffers.resize(1);
      glGenBuffers(1, &mIndexBuffers[0]);
  
      mVertexArrays.resize(1);
      glGenVertexArrays(1, &mVertexArrays[0]);
  
      mVertexBuffers.resize(2);
      glGenBuffers(2, &mVertexBuffers[0]);
  
      std::vector<GLubyte> indexData[2];
      indexData[0].push_back(0);
      indexData[0].push_back(1);
      indexData[0].push_back(2);
      indexData[0].push_back(2);
      indexData[0].push_back(3);
      indexData[0].push_back(0);
      indexData[0].push_back(4);
      indexData[0].push_back(5);
      indexData[0].push_back(6);
      indexData[0].push_back(6);
      indexData[0].push_back(7);
      indexData[0].push_back(4);
  
      // Make a copy:
      indexData[1] = indexData[0];
  
      std::vector<GLfloat> positionData = {// quad verts
                                           -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f,
                                           // Repeat position data
                                           -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f};
  
      std::vector<GLfloat> testFlagData = {// red
                                           1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
                                           // green
                                           0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f};
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLubyte) * indexData[0].size(), &indexData[0][0],
                   GL_STATIC_DRAW);
  
      glBindVertexArray(mVertexArrays[0]);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[0]);
      glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * positionData.size(), &positionData[0],
                   GL_STATIC_DRAW);
      glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(positionLocation);
  
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[1]);
      glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * testFlagData.size(), &testFlagData[0],
                   GL_STATIC_DRAW);
      glVertexAttribPointer(testFlagLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
      glEnableVertexAttribArray(testFlagLocation);
  
      ASSERT_GL_NO_ERROR();
  
      // Draw with just the second set of 6 items, then first 6, and then the entire index buffer
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, reinterpret_cast<const void *>(6));
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
  
      glDrawElements(GL_TRIANGLES, 12, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      // Reload the buffer again with a copy of the same data
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLubyte) * indexData[1].size(), &indexData[1][0],
                   GL_STATIC_DRAW);
  
      // Draw with just the first 6 indices, and then with the entire index buffer
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
  
      glDrawElements(GL_TRIANGLES, 12, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      // Reload the buffer again with a copy of the same data
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLubyte) * indexData[0].size(), &indexData[0][0],
                   GL_STATIC_DRAW);
  
      // This time, do not check color between draws (which causes a flush):
      // Draw with just the second set of 6 items, then first 6, and then the entire index buffer
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, reinterpret_cast<const void *>(6));
      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, nullptr);
      glDrawElements(GL_TRIANGLES, 12, GL_UNSIGNED_BYTE, nullptr);
      EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
  
      ASSERT_GL_NO_ERROR();
  }
  
  // Test that the offset in the index buffer is forced to be a multiple of the element size
  TEST_P(WebGLDrawElementsTest, DrawElementsTypeAlignment)
  {
      constexpr char kVS[] =
          "attribute vec3 a_pos;\n"
          "void main()\n"
          "{\n"
          "    gl_Position = vec4(a_pos, 1.0);\n"
          "}\n";
  
      ANGLE_GL_PROGRAM(program, kVS, essl1_shaders::fs::Blue());
  
      GLint posLocation = glGetAttribLocation(program, "a_pos");
      ASSERT_NE(-1, posLocation);
      glUseProgram(program);
  
      const auto &vertices = GetQuadVertices();
  
      GLBuffer vertexBuffer;
      glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
      glBufferData(GL_ARRAY_BUFFER, sizeof(vertices[0]) * vertices.size(), vertices.data(),
                   GL_STATIC_DRAW);
  
      glVertexAttribPointer(posLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
      glEnableVertexAttribArray(posLocation);
  
      GLBuffer indexBuffer;
      const GLubyte indices1[] = {0, 0, 0, 0, 0, 0};
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices1), indices1, GL_STATIC_DRAW);
  
      ASSERT_GL_NO_ERROR();
  
      const char *zeroIndices = nullptr;
  
      glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, zeroIndices);
      ASSERT_GL_NO_ERROR();
  
      const GLushort indices2[] = {0, 0, 0, 0, 0, 0};
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices2), indices2, GL_STATIC_DRAW);
  
      glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, zeroIndices + 1);
      EXPECT_GL_ERROR(GL_INVALID_OPERATION);
  }
  
  ANGLE_INSTANTIATE_TEST_ES3(DrawElementsTest);
  ANGLE_INSTANTIATE_TEST_ES2(WebGLDrawElementsTest);
  }  // namespace