| // |
| // 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 "ANGLETest.h" |
| |
| using namespace angle; |
| |
| class InstancingTest : public ANGLETest |
| { |
| protected: |
| InstancingTest() |
| { |
| setWindowWidth(256); |
| setWindowHeight(256); |
| setConfigRedBits(8); |
| setConfigGreenBits(8); |
| setConfigBlueBits(8); |
| setConfigAlphaBits(8); |
| } |
| |
| virtual void SetUp() |
| { |
| ANGLETest::SetUp(); |
| |
| mVertexAttribDivisorANGLE = NULL; |
| mDrawArraysInstancedANGLE = NULL; |
| mDrawElementsInstancedANGLE = NULL; |
| |
| char *extensionString = (char*)glGetString(GL_EXTENSIONS); |
| if (strstr(extensionString, "GL_ANGLE_instanced_arrays")) |
| { |
| mVertexAttribDivisorANGLE = (PFNGLVERTEXATTRIBDIVISORANGLEPROC)eglGetProcAddress("glVertexAttribDivisorANGLE"); |
| mDrawArraysInstancedANGLE = (PFNGLDRAWARRAYSINSTANCEDANGLEPROC)eglGetProcAddress("glDrawArraysInstancedANGLE"); |
| mDrawElementsInstancedANGLE = (PFNGLDRAWELEMENTSINSTANCEDANGLEPROC)eglGetProcAddress("glDrawElementsInstancedANGLE"); |
| } |
| |
| ASSERT_TRUE(mVertexAttribDivisorANGLE != NULL); |
| ASSERT_TRUE(mDrawArraysInstancedANGLE != NULL); |
| ASSERT_TRUE(mDrawElementsInstancedANGLE != NULL); |
| |
| // Initialize the vertex and index vectors |
| GLfloat qvertex1[3] = {-quadRadius, quadRadius, 0.0f}; |
| GLfloat qvertex2[3] = {-quadRadius, -quadRadius, 0.0f}; |
| GLfloat qvertex3[3] = { quadRadius, -quadRadius, 0.0f}; |
| GLfloat qvertex4[3] = { quadRadius, quadRadius, 0.0f}; |
| mQuadVertices.insert(mQuadVertices.end(), qvertex1, qvertex1 + 3); |
| mQuadVertices.insert(mQuadVertices.end(), qvertex2, qvertex2 + 3); |
| mQuadVertices.insert(mQuadVertices.end(), qvertex3, qvertex3 + 3); |
| mQuadVertices.insert(mQuadVertices.end(), qvertex4, qvertex4 + 3); |
| |
| GLfloat coord1[2] = {0.0f, 0.0f}; |
| GLfloat coord2[2] = {0.0f, 1.0f}; |
| GLfloat coord3[2] = {1.0f, 1.0f}; |
| GLfloat coord4[2] = {1.0f, 0.0f}; |
| mTexcoords.insert(mTexcoords.end(), coord1, coord1 + 2); |
| mTexcoords.insert(mTexcoords.end(), coord2, coord2 + 2); |
| mTexcoords.insert(mTexcoords.end(), coord3, coord3 + 2); |
| mTexcoords.insert(mTexcoords.end(), coord4, coord4 + 2); |
| |
| mIndices.push_back(0); |
| mIndices.push_back(1); |
| mIndices.push_back(2); |
| mIndices.push_back(0); |
| mIndices.push_back(2); |
| mIndices.push_back(3); |
| |
| for (size_t vertexIndex = 0; vertexIndex < 6; ++vertexIndex) |
| { |
| mNonIndexedVertices.insert(mNonIndexedVertices.end(), |
| mQuadVertices.begin() + mIndices[vertexIndex] * 3, |
| mQuadVertices.begin() + mIndices[vertexIndex] * 3 + 3); |
| } |
| |
| for (size_t vertexIndex = 0; vertexIndex < 6; ++vertexIndex) |
| { |
| mNonIndexedVertices.insert(mNonIndexedVertices.end(), |
| mQuadVertices.begin() + mIndices[vertexIndex] * 3, |
| mQuadVertices.begin() + mIndices[vertexIndex] * 3 + 3); |
| } |
| |
| // Tile a 2x2 grid of the tiles |
| for (float y = -1.0f + quadRadius; y < 1.0f - quadRadius; y += quadRadius * 3) |
| { |
| for (float x = -1.0f + quadRadius; x < 1.0f - quadRadius; x += quadRadius * 3) |
| { |
| GLfloat instance[3] = {x + quadRadius, y + quadRadius, 0.0f}; |
| mInstances.insert(mInstances.end(), instance, instance + 3); |
| } |
| } |
| |
| glClearColor(0.0f, 0.0f, 0.0f, 1.0f); |
| |
| ASSERT_GL_NO_ERROR(); |
| } |
| |
| GLuint setupDrawArraysTest(const std::string &vs) |
| { |
| const std::string fs = SHADER_SOURCE |
| ( |
| precision mediump float; |
| void main() |
| { |
| gl_FragColor = vec4(1.0, 0, 0, 1.0); |
| } |
| ); |
| |
| GLuint program = CompileProgram(vs, fs); |
| if (program == 0) |
| { |
| return 0; |
| } |
| |
| // Set the viewport |
| glViewport(0, 0, getWindowWidth(), getWindowHeight()); |
| |
| // Clear the color buffer |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| // Use the program object |
| glUseProgram(program); |
| |
| return program; |
| } |
| |
| void runDrawArraysTest(GLuint program, GLint first, GLsizei count, GLsizei instanceCount, float *offset) |
| { |
| GLuint vertexBuffer; |
| glGenBuffers(1, &vertexBuffer); |
| |
| glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer); |
| glBufferData(GL_ARRAY_BUFFER, mInstances.size() * sizeof(mInstances[0]), &mInstances[0], GL_STATIC_DRAW); |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| |
| // Get the attribute locations |
| GLint positionLoc = glGetAttribLocation(program, "a_position"); |
| GLint instancePosLoc = glGetAttribLocation(program, "a_instancePos"); |
| |
| // Load the vertex position |
| glVertexAttribPointer(positionLoc, 3, GL_FLOAT, GL_FALSE, 0, mNonIndexedVertices.data()); |
| glEnableVertexAttribArray(positionLoc); |
| |
| // Load the instance position |
| glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer); |
| glVertexAttribPointer(instancePosLoc, 3, GL_FLOAT, GL_FALSE, 0, 0); |
| glBindBuffer(GL_ARRAY_BUFFER, 0); |
| glEnableVertexAttribArray(instancePosLoc); |
| |
| // Enable instancing |
| mVertexAttribDivisorANGLE(instancePosLoc, 1); |
| |
| // Offset |
| GLint uniformLoc = glGetUniformLocation(program, "u_offset"); |
| ASSERT_NE(uniformLoc, -1); |
| glUniform3fv(uniformLoc, 1, offset); |
| |
| // Do the instanced draw |
| mDrawArraysInstancedANGLE(GL_TRIANGLES, first, count, instanceCount); |
| |
| ASSERT_GL_NO_ERROR(); |
| |
| swapBuffers(); |
| } |
| |
| virtual void runDrawElementsTest(std::string vs, bool shouldAttribZeroBeInstanced) |
| { |
| const std::string fs = SHADER_SOURCE |
| ( |
| precision mediump float; |
| void main() |
| { |
| gl_FragColor = vec4(1.0, 0, 0, 1.0); |
| } |
| ); |
| |
| GLuint program = CompileProgram(vs, fs); |
| ASSERT_NE(program, 0u); |
| |
| // Get the attribute locations |
| GLint positionLoc = glGetAttribLocation(program, "a_position"); |
| GLint instancePosLoc = glGetAttribLocation(program, "a_instancePos"); |
| |
| // If this ASSERT fails then the vertex shader code should be refactored |
| ASSERT_EQ(shouldAttribZeroBeInstanced, (instancePosLoc == 0)); |
| |
| // Set the viewport |
| glViewport(0, 0, getWindowWidth(), getWindowHeight()); |
| |
| // Clear the color buffer |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| // Use the program object |
| glUseProgram(program); |
| |
| // Load the vertex position |
| glVertexAttribPointer(positionLoc, 3, GL_FLOAT, GL_FALSE, 0, mQuadVertices.data()); |
| glEnableVertexAttribArray(positionLoc); |
| |
| // Load the instance position |
| glVertexAttribPointer(instancePosLoc, 3, GL_FLOAT, GL_FALSE, 0, mInstances.data()); |
| glEnableVertexAttribArray(instancePosLoc); |
| |
| // Enable instancing |
| mVertexAttribDivisorANGLE(instancePosLoc, 1); |
| |
| // Do the instanced draw |
| mDrawElementsInstancedANGLE(GL_TRIANGLES, mIndices.size(), GL_UNSIGNED_SHORT, mIndices.data(), mInstances.size() / 3); |
| |
| swapBuffers(); |
| ASSERT_GL_NO_ERROR(); |
| |
| checkQuads(); |
| } |
| |
| void checkQuads() |
| { |
| // Check that various pixels are the expected color. |
| for (unsigned int quadIndex = 0; quadIndex < 4; ++quadIndex) |
| { |
| unsigned int baseOffset = quadIndex * 3; |
| |
| int quadx = static_cast<int>(((mInstances[baseOffset + 0]) * 0.5f + 0.5f) * getWindowWidth()); |
| int quady = static_cast<int>(((mInstances[baseOffset + 1]) * 0.5f + 0.5f) * getWindowHeight()); |
| |
| EXPECT_PIXEL_EQ(quadx, quady, 255, 0, 0, 255); |
| } |
| } |
| |
| // Loaded entry points |
| PFNGLVERTEXATTRIBDIVISORANGLEPROC mVertexAttribDivisorANGLE; |
| PFNGLDRAWARRAYSINSTANCEDANGLEPROC mDrawArraysInstancedANGLE; |
| PFNGLDRAWELEMENTSINSTANCEDANGLEPROC mDrawElementsInstancedANGLE; |
| |
| // Vertex data |
| std::vector<GLfloat> mQuadVertices; |
| std::vector<GLfloat> mNonIndexedVertices; |
| std::vector<GLfloat> mTexcoords; |
| std::vector<GLfloat> mInstances; |
| std::vector<GLushort> mIndices; |
| |
| const GLfloat quadRadius = 0.30f; |
| }; |
| |
| class InstancingTestAllConfigs : public InstancingTest |
| { |
| protected: |
| InstancingTestAllConfigs() {} |
| }; |
| |
| class InstancingTestNo9_3 : public InstancingTest |
| { |
| protected: |
| InstancingTestNo9_3() {} |
| }; |
| |
| // This test uses a vertex shader with the first attribute (attribute zero) instanced. |
| // On D3D9 and D3D11 FL9_3, this triggers a special codepath that rearranges the input layout sent to D3D, |
| // to ensure that slot/stream zero of the input layout doesn't contain per-instance data. |
| TEST_P(InstancingTestAllConfigs, AttributeZeroInstanced) |
| { |
| const std::string vs = SHADER_SOURCE |
| ( |
| attribute vec3 a_instancePos; |
| attribute vec3 a_position; |
| void main() |
| { |
| gl_Position = vec4(a_position.xyz + a_instancePos.xyz, 1.0); |
| } |
| ); |
| |
| runDrawElementsTest(vs, true); |
| } |
| |
| // Same as AttributeZeroInstanced, but attribute zero is not instanced. |
| // This ensures the general instancing codepath (i.e. without rearranging the input layout) works as expected. |
| TEST_P(InstancingTestAllConfigs, AttributeZeroNotInstanced) |
| { |
| const std::string vs = SHADER_SOURCE |
| ( |
| attribute vec3 a_position; |
| attribute vec3 a_instancePos; |
| void main() |
| { |
| gl_Position = vec4(a_position.xyz + a_instancePos.xyz, 1.0); |
| } |
| ); |
| |
| runDrawElementsTest(vs, false); |
| } |
| |
| // Tests that the "first" parameter to glDrawArraysInstancedANGLE is only an offset into |
| // the non-instanced vertex attributes. |
| TEST_P(InstancingTestNo9_3, DrawArraysWithOffset) |
| { |
| const std::string vs = SHADER_SOURCE |
| ( |
| attribute vec3 a_position; |
| attribute vec3 a_instancePos; |
| uniform vec3 u_offset; |
| void main() |
| { |
| gl_Position = vec4(a_position.xyz + a_instancePos.xyz + u_offset, 1.0); |
| } |
| ); |
| |
| GLuint program = setupDrawArraysTest(vs); |
| ASSERT_NE(program, 0u); |
| |
| float offset1[3] = { 0, 0, 0 }; |
| runDrawArraysTest(program, 0, 6, 2, offset1); |
| |
| float offset2[3] = { 0.0f, 1.0f, 0 }; |
| runDrawArraysTest(program, 6, 6, 2, offset2); |
| |
| checkQuads(); |
| |
| glDeleteProgram(program); |
| } |
| |
| // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against. |
| // We test on D3D9 and D3D11 9_3 because they use special codepaths when attribute zero is instanced, unlike D3D11. |
| ANGLE_INSTANTIATE_TEST(InstancingTestAllConfigs, ES2_D3D9(), ES2_D3D11(), ES2_D3D11_FL9_3()); |
| |
| // TODO(jmadill): Figure out the situation with DrawInstanced on FL 9_3 |
| ANGLE_INSTANTIATE_TEST(InstancingTestNo9_3, ES2_D3D9(), ES2_D3D11()); |
