First player sprite iterations

src/com/gnarwhal/ld46/engine/shaders/Shader.java

@@ -0,0 +1,85 @@
+package com.gnarwhal.ld46.engine.shaders;
+
+import org.joml.Matrix4f;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+import static org.lwjgl.opengl.GL20.*;
+
+public abstract class Shader {
+
+	public static Shader2c SHADER2C;
+	public static Shader2t SHADER2T;
+	public static Shader2b SHADER2B;
+	
+	protected int program;
+	
+	protected int mvpLoc;
+	
+	protected Shader(String vertPath, String fragPath) {
+		program = glCreateProgram();
+		
+		int vert = loadShader(vertPath, GL_VERTEX_SHADER);
+		int frag = loadShader(fragPath, GL_FRAGMENT_SHADER);
+		
+		glAttachShader(program, vert);
+		glAttachShader(program, frag);
+		
+		glLinkProgram(program);
+		
+		glDetachShader(program, vert);
+		glDetachShader(program, frag);
+		
+		glDeleteShader(vert);
+		glDeleteShader(frag);
+		
+		mvpLoc = glGetUniformLocation(program, "mvp");
+	}
+	
+	private int loadShader(String path, int type) {
+		StringBuilder file = new StringBuilder();
+		try {
+			BufferedReader reader = new BufferedReader(new FileReader(new File(path)));
+			String line;
+			while((line = reader.readLine()) != null)
+				file.append(line + '\n');
+			reader.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		String source = file.toString();
+		int shader = glCreateShader(type);
+		glShaderSource(shader, source);
+		glCompileShader(shader);
+		if(glGetShaderi(shader, GL_COMPILE_STATUS) != 1)
+			throw new RuntimeException("Failed to compile shader: " + path + "! " + glGetShaderInfoLog(shader));
+		return shader;
+	}
+	
+	protected abstract void getUniforms();
+	
+	public void setMVP(Matrix4f matrix) {
+		glUniformMatrix4fv(mvpLoc, false, matrix.get(new float[16]));
+	}
+	
+	public void enable() {
+		glUseProgram(program);
+	}
+	
+	public void disable() {
+		glUseProgram(0);
+	}
+	
+	public void destroy() {
+		glDeleteProgram(program);
+	}
+	
+	public static void init() {
+		SHADER2C = new Shader2c();
+		SHADER2T = new Shader2t();
+		SHADER2B = new Shader2b();
+	}
+}