1 files changed, 49 insertions, 0 deletions
diff --git a/blockgame/shaders.js b/blockgame/shaders.js
new file mode 100644
index 0000000..f89270a
--- /dev/null
+++ b/blockgame/shaders.js
@@ -0,0 +1,49 @@
+const vs_src = `
+	attribute vec4 position;
+
+	uniform mat4 mv_matrix;
+	uniform mat4 projection_matrix;
+
+	void main() {
+		gl_Position = projection_matrix * mv_matrix * position;
+	}
+`;
+
+const fs_src = `
+	void main() {
+		gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
+	}
+`;
+
+export function init(gl) {
+	const vshader = loadShader(gl, gl.VERTEX_SHADER, vs_src);
+	const fshader = loadShader(gl, gl.FRAGMENT_SHADER, fs_src);
+
+	const program = gl.createProgram();
+	gl.attachShader(program, vshader);
+	gl.attachShader(program, fshader);
+
+	gl.linkProgram(program);
+
+	if(!gl.getProgramParameter(program, gl.LINK_STATUS)) {
+		alert("Unable to initialize shader program: " + gl.getProgramInfoLog(program));
+		return null;
+	}
+
+	return program;
+}
+
+export function loadShader(gl, type, src){
+	const shader = gl.createShader(type)
+
+	gl.shaderSource(shader, src);
+	gl.compileShader(shader);
+
+	if(!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
+		alert('Failed to compile shader : ' + gl.getShaderInfoLog(shader));
+		gl.deleteShader(shader);
+		return null;
+	}
+
+	return shader;
+}