80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
#include "headers/shader.h"
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const char *vertexShaderSource = "#version 330 core\n"
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"layout (location = 0) in vec3 aPos;\n"
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"void main()\n"
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"{\n"
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" gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
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"}\0";
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const char *fragmentShaderSource = "#version 330 core\n"
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"out vec4 FragColor;\n"
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"void main()\n"
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"{\n"
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" FragColor = vec4(0.25f, 1.0f, 0.49f, 1.0f);\n"
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"}\n\0";
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Shader::Shader() {
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m_program = glCreateProgram();
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m_shaders[0] = CreateShader(vertexShaderSource, GL_VERTEX_SHADER);
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m_shaders[1] = CreateShader(fragmentShaderSource, GL_FRAGMENT_SHADER);
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for (unsigned int i = 0; i < NUM_SHADERS; i++) {
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glAttachShader(m_program, m_shaders[i]);
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std::cout << "Shader successfully attatched" << std::endl;
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}
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glLinkProgram(m_program);
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int success;
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char infoLog[512];
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glGetProgramiv(m_program, GL_LINK_STATUS, &success);
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if (!success) {
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glGetProgramInfoLog(m_program, 512, NULL, infoLog);
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std::cout << "Shader program linking failed" << infoLog << std::endl;
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}
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else {
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std::cout << "Shader(s) successfully linked" << std::endl;
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std::cout << "Shader program successfully loadedd" << std::endl;
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}
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}
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GLuint Shader::CreateShader(const std::string& text, GLenum shaderType) {
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GLuint shader = glCreateShader(shaderType);
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if (shader == 0) {
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std::cout << "Error creating shader" << std::endl;
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}
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const GLchar* sourceString[1];
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sourceString[0] = text.c_str();
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glShaderSource(shader, 1, sourceString, NULL);
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glCompileShader(shader);
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int success;
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char infoLog[512];
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glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
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if (!success) {
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glGetShaderInfoLog(shader, 512, NULL, infoLog);
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std::cout << "Shader compilation failed" << infoLog << std::endl;
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}
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else {
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std::cout << "Shader successfully compiled" << std::endl;
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}
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return shader;
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}
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void Shader::Bind() {
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glUseProgram(m_program);
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}
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Shader::~Shader() {
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for (unsigned int i = 0; i < NUM_SHADERS; i++) {
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glDetachShader(m_program, m_shaders[i]);
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glDeleteShader(m_shaders[i]);
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}
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glDeleteProgram(m_program);
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}
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