| /*------------------------------------------------------------------------- |
| * OpenGL Conformance Test Suite |
| * ----------------------------- |
| * |
| * Copyright (c) 2015-2016 The Khronos Group Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ /*! |
| * \file |
| * \brief |
| */ /*-------------------------------------------------------------------*/ |
| |
| /*! |
| * \file esextcDrawBuffersIndexedBlending.hpp |
| * \brief Draw Buffers Indexed tests 5. Blending |
| */ /*-------------------------------------------------------------------*/ |
| |
| #include "esextcDrawBuffersIndexedBlending.hpp" |
| #include "gluPixelTransfer.hpp" |
| #include "gluShaderProgram.hpp" |
| #include "tcuTestLog.hpp" |
| #include <cmath> |
| |
| namespace glcts |
| { |
| |
| /** Constructor |
| * |
| * @param context Test context |
| * @param name Test case's name |
| * @param description Test case's description |
| **/ |
| DrawBuffersIndexedBlending::DrawBuffersIndexedBlending(Context& context, const ExtParameters& extParams, |
| const char* name, const char* description) |
| : DrawBuffersIndexedBase(context, extParams, name, description) |
| { |
| /* Left blank on purpose */ |
| } |
| |
| void DrawBuffersIndexedBlending::prepareFramebuffer() |
| { |
| const glw::Functions& gl = m_context.getRenderContext().getFunctions(); |
| |
| glw::GLint maxDrawBuffers = 0; |
| gl.getIntegerv(GL_MAX_DRAW_BUFFERS, &maxDrawBuffers); |
| if (maxDrawBuffers < 4) |
| { |
| throw tcu::ResourceError("Minimum number of draw buffers too low"); |
| } |
| |
| gl.genFramebuffers(1, &m_fbo); |
| gl.bindFramebuffer(GL_FRAMEBUFFER, m_fbo); |
| |
| std::vector<glw::GLenum> bufs(maxDrawBuffers); |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| bufs[i] = GL_COLOR_ATTACHMENT0 + i; |
| } |
| gl.drawBuffers(maxDrawBuffers, &bufs[0]); |
| } |
| |
| void DrawBuffersIndexedBlending::releaseFramebuffer() |
| { |
| const glw::Functions& gl = m_context.getRenderContext().getFunctions(); |
| |
| glw::GLint maxDrawBuffers = 0; |
| gl.getIntegerv(GL_MAX_DRAW_BUFFERS, &maxDrawBuffers); |
| if (maxDrawBuffers < 4) |
| { |
| throw tcu::ResourceError("Minimum number of draw buffers too low"); |
| } |
| |
| BlendMaskStateMachine state(m_context, m_testCtx.getLog(), maxDrawBuffers); |
| state.SetDefaults(); |
| gl.deleteFramebuffers(1, &m_fbo); |
| gl.bindFramebuffer(GL_FRAMEBUFFER, 0); |
| glw::GLenum bufs[1] = { GL_BACK }; |
| gl.drawBuffers(1, bufs); |
| gl.readBuffer(GL_BACK); |
| } |
| |
| tcu::TestNode::IterateResult DrawBuffersIndexedBlending::iterate() |
| { |
| static const glw::GLenum BlendFormats[] = { |
| GL_R8, GL_RG8, GL_RGB8, GL_RGB565, GL_RGBA4, GL_RGBA8, |
| }; |
| static const int kSize = 32; |
| static unsigned int formatId = 0; |
| |
| const glw::Functions& gl = m_context.getRenderContext().getFunctions(); |
| glw::GLenum format = BlendFormats[formatId]; |
| |
| prepareFramebuffer(); |
| |
| // Check number of available draw buffers |
| glw::GLint maxDrawBuffers = 0; |
| gl.getIntegerv(GL_MAX_DRAW_BUFFERS, &maxDrawBuffers); |
| if (maxDrawBuffers < 4) |
| { |
| m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Minimum number of draw buffers too low"); |
| return STOP; |
| } |
| |
| // Prepare render targets |
| glw::GLuint tex; |
| gl.genTextures(1, &tex); |
| gl.bindTexture(GL_TEXTURE_2D_ARRAY, tex); |
| gl.texStorage3D(GL_TEXTURE_2D_ARRAY, 1, format, kSize, kSize, maxDrawBuffers); |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| gl.framebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, tex, 0, i); |
| } |
| |
| // Clear background color |
| tcu::Vec4 background(0.5f, 0.5f, 0.5f, 0.5f); |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| gl.clearBufferfv(GL_COLOR, i, &background[0]); |
| } |
| |
| // Prepare expected, blended color values |
| tcu::Vec4 colors[] = { tcu::Vec4(0.86f, 0.22f, 0.31f, 0.45f), tcu::Vec4(0.12f, 0.83f, 0.34f, 0.42f), |
| tcu::Vec4(0.56f, 0.63f, 0.76f, 0.99f), tcu::Vec4(0.14f, 0.34f, 0.34f, 0.22f) }; |
| |
| int numComponents = NumComponents(format); |
| tcu::RGBA expected[] = { |
| // GL_MIN |
| tcu::RGBA(static_cast<unsigned int>(background.x() * 255), |
| static_cast<unsigned int>((numComponents >= 2 ? colors[0].y() : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents >= 3 ? colors[0].z() : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents == 4 ? background.w() : 1.0f) * 255)), |
| // GL_FUNC_ADD |
| tcu::RGBA(static_cast<unsigned int>(background.x() * 255), |
| static_cast<unsigned int>((numComponents >= 2 ? background.y() : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents >= 3 ? background.z() : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents == 4 ? colors[1].w() : 1.0f) * 255)), |
| // GL_FUNC_SUBTRACT |
| tcu::RGBA( |
| static_cast<unsigned int>((colors[2].x() * (numComponents == 4 ? colors[2].w() : 1.0f) - |
| background.x() * (numComponents == 4 ? background.w() : 1.0f)) * |
| 255), |
| static_cast<unsigned int>((numComponents >= 2 ? |
| (colors[2].y() * (numComponents == 4 ? colors[2].w() : 1.0f) - |
| background.y() * (numComponents == 4 ? background.w() : 1.0f)) : |
| 0.0f) * |
| 255), |
| static_cast<unsigned int>((numComponents >= 3 ? |
| (colors[2].z() * (numComponents == 4 ? colors[2].w() : 1.0f) - |
| background.z() * (numComponents == 4 ? background.w() : 1.0f)) : |
| 0.0f) * |
| 255), |
| static_cast<unsigned int>( |
| (numComponents == 4 ? (colors[2].w() * colors[2].w() - background.w() * background.w()) : 1.0f) * 255)), |
| // GL_FUNC_REVERSE_SUBTRACT |
| tcu::RGBA(static_cast<unsigned int>((background.x() - colors[3].x()) * 255), |
| static_cast<unsigned int>((numComponents >= 2 ? (background.y() - colors[3].y()) : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents >= 3 ? (background.z() - colors[3].z()) : 0.0f) * 255), |
| static_cast<unsigned int>((numComponents == 4 ? (background.w() - colors[3].w()) : 1.0f) * 255)) |
| }; |
| |
| // Setup blending operations |
| BlendMaskStateMachine state(m_context, m_testCtx.getLog(), maxDrawBuffers); |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| switch (i % 4) |
| { |
| case 0: |
| // GL_MIN |
| state.SetEnablei(i); |
| state.SetBlendEquationSeparatei(i, GL_MIN, GL_MAX); |
| state.SetBlendFunci(i, GL_ONE, GL_ONE); |
| break; |
| case 1: |
| // GL_FUNC_ADD |
| state.SetEnablei(i); |
| state.SetBlendEquationi(i, GL_FUNC_ADD); |
| state.SetBlendFuncSeparatei(i, GL_ZERO, GL_ONE, GL_ONE, GL_ZERO); |
| break; |
| case 2: |
| // GL_FUNC_SUBTRACT |
| state.SetEnablei(i); |
| state.SetBlendEquationi(i, GL_FUNC_SUBTRACT); |
| state.SetBlendFunci(i, GL_SRC_ALPHA, GL_DST_ALPHA); |
| break; |
| case 3: |
| // GL_FUNC_REVERSE_SUBTRACT |
| state.SetEnablei(i); |
| state.SetBlendEquationi(i, GL_FUNC_REVERSE_SUBTRACT); |
| state.SetBlendFunci(i, GL_ONE, GL_ONE); |
| break; |
| } |
| } |
| |
| // Prepare shader programs and draw fullscreen quad |
| glu::ShaderProgram program(m_context.getRenderContext(), |
| glu::makeVtxFragSources(GenVS().c_str(), GenFS(maxDrawBuffers).c_str())); |
| if (!program.isOk()) |
| { |
| m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Could not create shader program"); |
| return STOP; |
| } |
| gl.useProgram(program.getProgram()); |
| |
| glw::GLuint positionLocation = gl.getAttribLocation(program.getProgram(), "position"); |
| tcu::Vec3 vertices[] = { |
| tcu::Vec3(-1.0f, -1.0f, 0.0f), tcu::Vec3(1.0f, -1.0f, 0.0f), tcu::Vec3(-1.0f, 1.0f, 0.0f), |
| tcu::Vec3(1.0f, 1.0f, 0.0f), tcu::Vec3(-1.0f, 1.0f, 0.0f), tcu::Vec3(1.0f, -1.0f, 0.0f) |
| }; |
| |
| gl.vertexAttribPointer(positionLocation, 3, GL_FLOAT, GL_FALSE, 0, vertices); |
| gl.enableVertexAttribArray(positionLocation); |
| |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| std::ostringstream os; |
| os << "c" << i; |
| // i.e.: glUniform4fv(glGetUniformLocation(m_program, "c0"), 1, &colors[i].r); |
| gl.uniform4fv(gl.getUniformLocation(program.getProgram(), os.str().c_str()), 1, &colors[i % 4][0]); |
| } |
| |
| gl.drawArrays(GL_TRIANGLES, 0, 6); |
| |
| // Read buffer colors and validate proper blending behaviour |
| bool success = true; |
| tcu::RGBA epsilon = GetEpsilon(); |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| gl.readBuffer(GL_COLOR_ATTACHMENT0 + i); |
| |
| tcu::TextureLevel textureLevel(tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::UNORM_INT8), |
| kSize, kSize); |
| glu::readPixels(m_context.getRenderContext(), 0, 0, textureLevel.getAccess()); |
| |
| if (!VerifyImg(textureLevel, expected[i % 4], epsilon)) |
| { |
| m_testCtx.getLog() << tcu::TestLog::Message << "Blending error in texture format " << format |
| << " occurred for draw buffer #" << i << "\n" |
| << tcu::TestLog::EndMessage; |
| m_testCtx.getLog() << tcu::TestLog::Image("Result", "Rendered result image", textureLevel.getAccess()); |
| success = false; |
| } |
| } |
| |
| gl.disable(GL_BLEND); |
| gl.useProgram(0); |
| gl.bindTexture(GL_TEXTURE_2D_ARRAY, 0); |
| gl.deleteTextures(1, &tex); |
| releaseFramebuffer(); |
| |
| // Check for error |
| glw::GLenum error_code = gl.getError(); |
| if (error_code != GL_NO_ERROR) |
| { |
| m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Some functions generated error"); |
| formatId = 0; |
| return STOP; |
| } |
| |
| if (!success) |
| { |
| m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Blending error occurred"); |
| formatId = 0; |
| return STOP; |
| } |
| else |
| { |
| ++formatId; |
| if (formatId < (sizeof(BlendFormats) / sizeof(BlendFormats[0]))) |
| { |
| return CONTINUE; |
| } |
| else |
| { |
| m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass"); |
| formatId = 0; |
| return STOP; |
| } |
| } |
| } |
| |
| std::string DrawBuffersIndexedBlending::GenVS() |
| { |
| std::ostringstream os; |
| os << "#version 300 es \n" |
| "precision highp float; \n" |
| "precision highp int; \n" |
| "layout(location = 0) in vec4 position; \n" |
| "void main() { \n" |
| " gl_Position = position; \n" |
| "}"; |
| return os.str(); |
| } |
| std::string DrawBuffersIndexedBlending::GenFS(int maxDrawBuffers) |
| { |
| std::ostringstream os; |
| os << "#version 300 es \n" |
| "precision highp float; \n" |
| "precision highp int; \n"; |
| |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| os << "\nlayout(location = " << i << ") out vec4 color" << i << ";"; |
| } |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| os << "\nuniform vec4 c" << i << ";"; |
| } |
| |
| os << "\nvoid main() {"; |
| |
| for (int i = 0; i < maxDrawBuffers; ++i) |
| { |
| os << "\n color" << i << " = c" << i << ";"; |
| } |
| |
| os << "\n}"; |
| return os.str(); |
| } |
| |
| unsigned int DrawBuffersIndexedBlending::NumComponents(glw::GLenum format) |
| { |
| switch (format) |
| { |
| case GL_R8: |
| case GL_R8I: |
| case GL_R8UI: |
| case GL_R16I: |
| case GL_R16UI: |
| case GL_R32I: |
| case GL_R32UI: |
| return 1; |
| case GL_RG8: |
| case GL_RG8I: |
| case GL_RG8UI: |
| case GL_RG16I: |
| case GL_RG16UI: |
| case GL_RG32I: |
| case GL_RG32UI: |
| return 2; |
| case GL_RGB8: |
| case GL_RGB565: |
| return 3; |
| case GL_RGBA4: |
| case GL_RGB5_A1: |
| case GL_RGBA8: |
| case GL_RGB10_A2: |
| case GL_RGBA8I: |
| case GL_RGBA8UI: |
| case GL_RGBA16I: |
| case GL_RGBA16UI: |
| case GL_RGBA32I: |
| case GL_RGBA32UI: |
| return 4; |
| default: |
| return 0; |
| } |
| } |
| |
| tcu::RGBA DrawBuffersIndexedBlending::GetEpsilon() |
| { |
| const glw::Functions& gl = m_context.getRenderContext().getFunctions(); |
| |
| tcu::IVec4 bits; |
| tcu::UVec4 epsilon; |
| |
| for (int i = 0; i < 4; ++i) |
| { |
| gl.getIntegerv(GL_RED_BITS + i, &bits[i]); |
| epsilon[i] = de::min( |
| 255u, static_cast<unsigned int>(ceil(1.0 + 255.0 * (1.0 / pow(2.0, static_cast<double>(bits[i])))))); |
| } |
| |
| return tcu::RGBA(epsilon.x(), epsilon.y(), epsilon.z(), epsilon.w()); |
| } |
| |
| bool DrawBuffersIndexedBlending::VerifyImg(const tcu::TextureLevel& textureLevel, tcu::RGBA expectedColor, |
| tcu::RGBA epsilon) |
| { |
| for (int y = 0; y < textureLevel.getHeight(); ++y) |
| { |
| for (int x = 0; x < textureLevel.getWidth(); ++x) |
| { |
| tcu::RGBA pixel(textureLevel.getAccess().getPixel(x, y)); |
| if (!tcu::compareThreshold(pixel, expectedColor, epsilon)) |
| { |
| m_testCtx.getLog() << tcu::TestLog::Message << "Expected value: " << expectedColor << "\n" |
| << "Read value: " << pixel << "\n" |
| << "Epsilon: " << epsilon << tcu::TestLog::EndMessage; |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| } // namespace glcts |