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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,10 @@ | ||
| FILE(GLOB IRRADIANCE_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp) | ||
| FILE(GLOB IRRADIANCE_HEADER_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.h) | ||
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| ADD_EXECUTABLE(Irradiance ${IRRADIANCE_SOURCE_FILES} ${IRRADIANCE_HEADER_FILES} ) | ||
| TARGET_LINK_LIBRARIES(Irradiance glCommon gl-sample-common-asset-importer) | ||
| ADD_DEPENDENCIES(Irradiance glCommon gl-sample-common-asset-importer) | ||
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| TARGET_INCLUDE_DIRECTORIES(Irradiance PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ) | ||
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| INSTALL(TARGETS Irradiance DESTINATION bin) |
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| #include "GLUIComponent.h" | ||
| #include "Skybox.h" | ||
| #include <GL/glew.h> | ||
| #include <GLSample.h> | ||
| #include <GLSampleWindow.h> | ||
| #include <ImageImport.h> | ||
| #include <ShaderLoader.h> | ||
| #include <Util/CameraController.h> | ||
| #include <glm/glm.hpp> | ||
| #include <glm/gtc/matrix_transform.hpp> | ||
| #include <iostream> | ||
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| namespace glsample { | ||
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| /** | ||
| * @brief | ||
| * | ||
| */ | ||
| class Irradiance : public GLSampleWindow { | ||
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| public: | ||
| Irradiance() : GLSampleWindow() { | ||
| this->setTitle("Irradiance"); | ||
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| this->skyboxSettingComponent = | ||
| std::make_shared<IrradianceSettingComponent>(*this); | ||
| this->addUIComponent(this->skyboxSettingComponent); | ||
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| this->camera.setPosition(glm::vec3(25.0f)); | ||
| this->camera.lookAt(glm::vec3(0.f)); | ||
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| this->camera.enableNavigation(true); | ||
| } | ||
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| struct uniform_buffer_block { | ||
| glm::mat4 proj{}; | ||
| glm::mat4 modelViewProjection{}; | ||
| glm::vec4 tintColor = glm::vec4(1.0f, 1.0f, 1.0f, 1.0f); | ||
| float exposure = 1.0f; | ||
| float gamma = 2.2; | ||
| } uniform_stage_buffer; | ||
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| Skybox skybox; | ||
| MeshObject sphere; | ||
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| unsigned int display_graphic_program{}; | ||
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| unsigned int irradiance_texture = 0; | ||
| unsigned int skybox_texture_panoramic = 0; | ||
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| CameraController camera; | ||
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| /* Uniform buffer. */ | ||
| unsigned int uniform_buffer_binding = 0; | ||
| unsigned int uniform_buffer{}; | ||
| const size_t nrUniformBuffer = 3; | ||
| size_t uniformSize = sizeof(uniform_buffer_block); | ||
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| const std::string vertexSkyboxPanoramicShaderPath = "Shaders/irradiance/irradiance.vert.spv"; | ||
| const std::string fragmentSkyboxPanoramicShaderPath = "Shaders/skybox/panoramic.frag.spv"; | ||
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| public: | ||
| class IrradianceSettingComponent : public GLUIComponent<Irradiance> { | ||
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| public: | ||
| IrradianceSettingComponent(Irradiance &sample) | ||
| : GLUIComponent<Irradiance>(sample, "Irradiance Settings"), uniform(sample.uniform_stage_buffer) {} | ||
| void draw() override { | ||
| ImGui::ColorEdit4("Tint", &this->uniform.tintColor[0], | ||
| ImGuiColorEditFlags_HDR | ImGuiColorEditFlags_Float); | ||
| ImGui::TextUnformatted("Debug"); | ||
| ImGui::Checkbox("WireFrame", &this->showWireFrame); | ||
| ImGui::Image(static_cast<ImTextureID>(this->getRefSample().irradiance_texture), ImVec2(512, 256), | ||
| ImVec2(1, 1), ImVec2(0, 0)); | ||
| } | ||
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| bool showWireFrame = false; | ||
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| private: | ||
| struct uniform_buffer_block &uniform; | ||
| }; | ||
| std::shared_ptr<IrradianceSettingComponent> skyboxSettingComponent; | ||
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| void Release() override { | ||
| glDeleteProgram(this->display_graphic_program); | ||
| glDeleteTextures(1, (const GLuint *)&this->skybox_texture_panoramic); | ||
| glDeleteTextures(1, (const GLuint *)&this->irradiance_texture); | ||
| } | ||
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| void Initialize() override { | ||
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| const std::string panoramicPath = this->getResult()["texture"].as<std::string>(); | ||
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| { | ||
| /* Load shader binaries. */ | ||
| const std::vector<uint32_t> vertex_skybox_binary = | ||
| IOUtil::readFileData<uint32_t>(this->vertexSkyboxPanoramicShaderPath, this->getFileSystem()); | ||
| const std::vector<uint32_t> fragment_skybox_binary = | ||
| IOUtil::readFileData<uint32_t>(this->fragmentSkyboxPanoramicShaderPath, this->getFileSystem()); | ||
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| /* */ | ||
| fragcore::ShaderCompiler::CompilerConvertOption compilerOptions; | ||
| compilerOptions.target = fragcore::ShaderLanguage::GLSL; | ||
| compilerOptions.glslVersion = this->getShaderVersion(); | ||
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| /* Create skybox graphic pipeline program. */ | ||
| this->display_graphic_program = | ||
| ShaderLoader::loadGraphicProgram(compilerOptions, &vertex_skybox_binary, &fragment_skybox_binary); | ||
| } | ||
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| /* Setup graphic pipeline. */ | ||
| glUseProgram(this->display_graphic_program); | ||
| unsigned int uniform_buffer_index = | ||
| glGetUniformBlockIndex(this->display_graphic_program, "UniformBufferBlock"); | ||
| glUniformBlockBinding(this->display_graphic_program, uniform_buffer_index, 0); | ||
| glUniform1i(glGetUniformLocation(this->display_graphic_program, "PanoramaTexture"), 0); | ||
| glUseProgram(0); | ||
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| /* Load panoramic texture. */ | ||
| TextureImporter textureImporter(this->getFileSystem()); | ||
| this->skybox_texture_panoramic = textureImporter.loadImage2D(panoramicPath, ColorSpace::SRGB); | ||
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| ProcessData util(this->getFileSystem()); | ||
| util.computeIrradiance(this->skybox_texture_panoramic, this->irradiance_texture, 256, 128); | ||
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| skybox.Init(this->skybox_texture_panoramic, Skybox::loadDefaultProgram(this->getFileSystem())); | ||
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| /* */ | ||
| GLint minMapBufferSize = 0; | ||
| glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &minMapBufferSize); | ||
| this->uniformSize = Math::align<size_t>(this->uniformSize, (size_t)minMapBufferSize); | ||
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| /* Create uniform buffer. */ | ||
| glGenBuffers(1, &this->uniform_buffer); | ||
| glBindBuffer(GL_UNIFORM_BUFFER, this->uniform_buffer); | ||
| glBufferData(GL_UNIFORM_BUFFER, this->uniformSize * this->nrUniformBuffer, nullptr, GL_DYNAMIC_DRAW); | ||
| glBindBuffer(GL_UNIFORM_BUFFER, 0); | ||
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| Common::loadSphere(this->sphere, 3, 16, 16); | ||
| } | ||
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| void onResize(int width, int height) override { this->camera.setAspect((float)width / (float)height); } | ||
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| void draw() override { | ||
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| int width = 0, height = 0; | ||
| this->getSize(&width, &height); | ||
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| /* */ | ||
| glViewport(0, 0, width, height); | ||
| /* */ | ||
| glClearColor(0.0f, 0.0f, 0.0f, 1.0f); | ||
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); | ||
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| /* Optional - to display wireframe. */ | ||
| glPolygonMode(GL_FRONT_AND_BACK, skyboxSettingComponent->showWireFrame ? GL_LINE : GL_FILL); | ||
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| { | ||
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| glBindBufferRange(GL_UNIFORM_BUFFER, this->uniform_buffer_binding, this->uniform_buffer, | ||
| (this->getFrameCount() % this->nrUniformBuffer) * this->uniformSize, | ||
| this->uniformSize); | ||
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| /* */ | ||
| glUseProgram(this->display_graphic_program); | ||
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| glDisable(GL_CULL_FACE); | ||
| glEnable(GL_DEPTH_TEST); | ||
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| /* */ | ||
| glActiveTexture(GL_TEXTURE0); | ||
| glBindTexture(GL_TEXTURE_2D, this->irradiance_texture); | ||
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| /* Draw triangle. */ | ||
| glBindVertexArray(this->sphere.vao); | ||
| glDrawElements(GL_TRIANGLES, this->sphere.nrIndicesElements, GL_UNSIGNED_INT, nullptr); | ||
| glBindVertexArray(0); | ||
| } | ||
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| this->skybox.Render(this->camera); | ||
| } | ||
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| void update() override { | ||
| /* */ | ||
| this->camera.update(this->getTimer().deltaTime<float>()); | ||
|
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| /* */ | ||
| this->uniform_stage_buffer.proj = this->camera.getProjectionMatrix(); | ||
| this->uniform_stage_buffer.modelViewProjection = | ||
| (this->uniform_stage_buffer.proj * this->camera.getViewMatrix()); | ||
|
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| /* */ | ||
| glBindBuffer(GL_UNIFORM_BUFFER, this->uniform_buffer); | ||
| void *uniformPointer = glMapBufferRange( | ||
| GL_UNIFORM_BUFFER, ((this->getFrameCount() + 1) % this->nrUniformBuffer) * this->uniformSize, | ||
| this->uniformSize, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT); | ||
| memcpy(uniformPointer, &this->uniform_stage_buffer, sizeof(this->uniform_stage_buffer)); | ||
| glUnmapBuffer(GL_UNIFORM_BUFFER); | ||
| } | ||
| }; | ||
|
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| class IrradianceGLSample : public GLSample<Irradiance> { | ||
| public: | ||
| IrradianceGLSample() : GLSample<Irradiance>() {} | ||
|
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| void customOptions(cxxopts::OptionAdder &options) override { | ||
| options("T,texture", "Texture Path", | ||
| cxxopts::value<std::string>()->default_value("asset/snowy_forest_4k.exr")); | ||
| } | ||
| }; | ||
| } // namespace glsample | ||
|
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| int main(int argc, const char **argv) { | ||
| try { | ||
| glsample::IrradianceGLSample sample; | ||
| sample.run(argc, argv); | ||
|
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| } catch (const std::exception &ex) { | ||
| std::cerr << cxxexcept::getStackMessage(ex) << std::endl; | ||
| return EXIT_FAILURE; | ||
| } | ||
| return EXIT_SUCCESS; | ||
| } |
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