initial commit

shaders/ds_tonemap.glsl

@@ -0,0 +1,25 @@
+// vert //
+
+void main(void) {
+	gl_Position = qgl_ftransform();
+}
+
+
+// frag //
+
+uniform sampler2D tex_0;
+uniform float gamma, frame_max;
+
+const vec3 luma = vec3(0.299, 0.587, 0.114);
+
+void main(void) {
+	ivec2 tc = ivec2(gl_FragCoord.xy);
+	vec4 src = texelFetch(tex_0, tc, 0);
+	vec3 res = src.rgb;
+	float l = dot(res, luma) * 0.75;
+	float g = gamma / frame_max;
+	res /= l;
+	l = 1 - exp(-l*g);
+	res *= l;
+	qgl_FragColor = vec4(res, dot(res, luma));
+}