82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
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#include <GL/glew.h>
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#include <GLFW/glfw3.h>
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include "shader.hpp"
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#include "window.hpp"
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using namespace Sim::Graphics;
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static unsigned int prog_id;
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int Shader::gl_tex_mat;
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int Shader::gl_model;
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int Shader::gl_camera;
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int Shader::gl_projection;
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static int load_shader(const char* src, int type)
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{
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int id = glCreateShader(type);
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glShaderSource(id, 1, &src, nullptr);
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glCompileShader(id);
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return id;
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}
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static std::string read_shader(const char* path)
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{
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std::stringstream ss;
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std::ifstream file(path, std::ios::binary);
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char buff[1024];
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while(!file.eof())
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{
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file.read(buff, 1024);
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ss.write(buff, file.gcount());
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}
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return ss.str();
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}
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unsigned int Shader::init_program()
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{
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std::string shader_vsh = read_shader("../assets/shader/main.vsh");
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std::string shader_fsh = read_shader("../assets/shader/main.fsh");
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int success;
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int vsh_id = load_shader(shader_vsh.c_str(), GL_VERTEX_SHADER);
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int fsh_id = load_shader(shader_fsh.c_str(), GL_FRAGMENT_SHADER);
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prog_id = glCreateProgram();
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glAttachShader(prog_id, vsh_id);
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glAttachShader(prog_id, fsh_id);
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glLinkProgram(prog_id);
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glGetProgramiv(prog_id, GL_LINK_STATUS, &success);
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if(!success)
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{
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char infoLog[512];
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glGetProgramInfoLog(prog_id, 512, NULL, infoLog);
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std::cout << "Shader Link Error: " << infoLog << std::endl;
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Window::close();
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return 0;
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}
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gl_tex_mat = glGetUniformLocation(prog_id, "tex_mat");
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gl_model = glGetUniformLocation(prog_id, "model");
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gl_camera = glGetUniformLocation(prog_id, "camera");
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gl_projection = glGetUniformLocation(prog_id, "projection");
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glUseProgram(prog_id);
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glDeleteShader(vsh_id);
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glDeleteShader(fsh_id);
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return prog_id;
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}
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