begin 3d

app/src/main/java/chess/view/DDDrender/shader/ShaderProgram.java

@@ -0,0 +1,94 @@
+package chess.view.DDDrender.shader;
+
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+
+import org.joml.Matrix4f;
+import org.joml.Vector3f;
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL30;
+import org.lwjgl.system.MemoryStack;
+
+public abstract class ShaderProgram {
+	private int programId;
+	private int vertexShaderId;
+	private int fragmentShaderId;
+
+	public ShaderProgram() {
+		this.programId = 0;
+		this.vertexShaderId = 0;
+		this.fragmentShaderId = 0;
+	}
+
+	public void Start() {
+		GL30.glUseProgram(this.programId);
+	}
+
+	public void Stop() {
+		GL30.glUseProgram(0);
+	}
+
+	public void LoadProgram(String vertexSource, String fragmentSource) {
+		this.vertexShaderId = LoadShader(vertexSource, GL30.GL_VERTEX_SHADER);
+		this.fragmentShaderId = LoadShader(fragmentSource, GL30.GL_FRAGMENT_SHADER);
+
+		this.programId = GL30.glCreateProgram();
+		GL30.glAttachShader(this.programId, vertexShaderId);
+		GL30.glAttachShader(this.programId, this.fragmentShaderId);
+		GL30.glLinkProgram(this.programId);
+		GL30.glValidateProgram(this.programId);
+
+		if (GL30.glGetProgrami(programId, GL30.GL_VALIDATE_STATUS) == 0) {
+			System.err.println("Warning validating Shader code: " + GL30.glGetProgramInfoLog(programId, 1024));
+		}
+
+		GetAllUniformLocation();
+	}
+
+	private int LoadShader(String source, int type) {
+		int shaderId = GL30.glCreateShader(type);
+
+		GL30.glShaderSource(shaderId, source);
+		GL30.glCompileShader(shaderId);
+
+		IntBuffer compileSuccesful = BufferUtils.createIntBuffer(1);
+		GL30.glGetShaderiv(shaderId, GL30.GL_COMPILE_STATUS, compileSuccesful);
+
+		if (compileSuccesful.get() != 1) {
+			System.out.println("Shader did not compile !");
+			return -1;
+
+		}
+
+		return shaderId;
+	}
+
+	protected abstract void GetAllUniformLocation();
+
+	protected int GetUniformLocation(String uniformName) {
+		int location = GL30.glGetUniformLocation(programId, uniformName);
+		if (location == -1) {
+			System.out.println("Uniform value not found !");
+		}
+		return location;
+	}
+
+	public void LoadFloat(int location, float value) {
+		GL30.glUniform1f(location, value);
+	}
+
+	public void LoadInt(int location, int value) {
+		GL30.glUniform1i(location, value);
+	}
+
+	public void LoadVector(int location, Vector3f vector) {
+		GL30.glUniform3f(location, vector.x, vector.y, vector.z);
+	}
+
+	public void LoadMat4(int location, Matrix4f mat) {
+		try (MemoryStack stack = MemoryStack.stackPush()) {
+			FloatBuffer buffer = mat.get(stack.mallocFloat(16));
+			GL30.glUniformMatrix4fv(location, false, buffer);
+		}
+	}
+}