.. _program_listing_file_Src_GraphicsEngineOpenGL_renderer_ShaderIncludes.cpp:

Program Listing for File ShaderIncludes.cpp
===========================================

|exhale_lsh| :ref:`Return to documentation for file <file_Src_GraphicsEngineOpenGL_renderer_ShaderIncludes.cpp>` (``Src/GraphicsEngineOpenGL/renderer/ShaderIncludes.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "renderer/ShaderIncludes.hpp"
   #include "renderer/OpenGLRendererConfig.hpp"
   
   // clang-format off
   // you must include glad before glfw!
   // therefore disable clang-format for this section
   #include <glad/glad.h>
   #include <GLFW/glfw3.h>
   // clang-format on
   
   #include <stdio.h>
   #include <string.h>
   
   #include <array>
   #include <cassert>
   #include <filesystem>
   #include <sstream>
   
   #include "spdlog/spdlog.h"
   #include "util/File.hpp"
   
   // this method is setting all files we want to use in a shader per #include
   // you have to specify the name(how file appears in shader)
   // and its actual file location relatively
   // https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_shading_language_include.txt
   ShaderIncludes::ShaderIncludes()
   {
       assert(includeNames.size() == file_locations_relative.size());
   
       if (!isExtensionSupported("GL_ARB_shading_language_include")) {
           spdlog::error("GL_ARB_shading_language_include is supported!");
       }
   
       std::vector<std::string> file_locations_abs;
       for (uint32_t i = 0; i < static_cast<uint32_t>(includeNames.size()); i++) {
           std::stringstream aux;
           std::filesystem::path cwd = std::filesystem::current_path();
           aux << cwd.string();
           aux << RELATIVE_RESOURCE_PATH;
           aux << file_locations_relative[i];
           file_locations_abs.push_back(aux.str());
       }
   
       for (uint32_t i = 0; i < static_cast<uint32_t>(includeNames.size()); i++) {
           File file(file_locations_abs[i]);
           std::string file_content = file.read();
           char tmpstr[2000];
           snprintf(tmpstr, 2000, "/%s", includeNames[i]);
           if (glNamedStringARB) {
               spdlog::info("glNamedStringARB successfully loaded!");
           } else {
               spdlog::error("Failed to load glNamedStringARB!");
           }
           glNamedStringARB(GL_SHADER_INCLUDE_ARB,
             static_cast<GLint>(strlen(tmpstr)),
             tmpstr,
             static_cast<GLint>(strlen(file_content.c_str())),
             file_content.c_str());
       }
   }
   
   ShaderIncludes::~ShaderIncludes() {}