Initial commit

OpenGL/shader.cpp

@@ -0,0 +1,79 @@
+#include "shader.h"
+
+const char *vertexShaderSource = "#version 330 core\n"
+"layout (location = 0) in vec3 aPos;\n"
+"void main()\n"
+"{\n"
+"   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+"}\0";
+const char *fragmentShaderSource = "#version 330 core\n"
+"out vec4 FragColor;\n"
+"void main()\n"
+"{\n"
+"   FragColor = vec4(0.25f, 1.0f, 0.49f, 1.0f);\n"
+"}\n\0";
+
+Shader::Shader() {
+	m_program = glCreateProgram();
+	m_shaders[0] = CreateShader(vertexShaderSource, GL_VERTEX_SHADER);
+	m_shaders[1] = CreateShader(fragmentShaderSource, GL_FRAGMENT_SHADER);
+
+	for (unsigned int i = 0; i < NUM_SHADERS; i++) {
+		glAttachShader(m_program, m_shaders[i]);
+		std::cout << "Shader successfully attatched" << std::endl;
+	}
+
+	glLinkProgram(m_program);
+
+	int success;
+	char infoLog[512];
+	glGetProgramiv(m_program, GL_LINK_STATUS, &success);
+	if (!success) {
+		glGetProgramInfoLog(m_program, 512, NULL, infoLog);
+		std::cout << "Shader program linking failed" << infoLog << std::endl;
+	}
+	else {
+		std::cout << "Shader(s) successfully linked" << std::endl;
+		std::cout << "Shader program successfully loadedd" << std::endl;
+	}
+}
+
+GLuint Shader::CreateShader(const std::string& text, GLenum shaderType) {
+	GLuint shader = glCreateShader(shaderType);
+
+	if (shader == 0) {
+		std::cout << "Error creating shader" << std::endl;
+	}
+
+	const GLchar* sourceString[1];
+	sourceString[0] = text.c_str();
+
+	glShaderSource(shader, 1, sourceString, NULL);
+	glCompileShader(shader);
+
+	int success;
+	char infoLog[512];
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+	if (!success) {
+		glGetShaderInfoLog(shader, 512, NULL, infoLog);
+		std::cout << "Shader compilation failed" << infoLog << std::endl;
+	}
+	else {
+		std::cout << "Shader successfully compiled" << std::endl;
+	}
+
+	return shader;
+}
+
+void Shader::Bind() {
+	glUseProgram(m_program);
+}
+
+Shader::~Shader() {
+	for (unsigned int i = 0; i < NUM_SHADERS; i++) {
+		glDetachShader(m_program, m_shaders[i]);
+		glDeleteShader(m_shaders[i]);
+	}
+
+	glDeleteProgram(m_program);
+}