1 files changed, 41 insertions, 0 deletions
diff --git a/src/rend2/glsl/shadowfill_fp.glsl b/src/rend2/glsl/shadowfill_fp.glsl
new file mode 100644
index 00000000..150f3d12
--- /dev/null
+++ b/src/rend2/glsl/shadowfill_fp.glsl
@@ -0,0 +1,41 @@
+uniform vec4  u_LightOrigin;
+uniform float u_LightRadius;
+
+varying vec3  var_Position;
+
+void main()
+{
+#if defined(USE_DEPTH)
+	float depth = length(u_LightOrigin.xyz - var_Position) / u_LightRadius;
+ #if 0
+	// 32 bit precision
+	const vec4 bitSh = vec4( 256 * 256 * 256,   256 * 256,         256,           1);
+	const vec4 bitMsk = vec4(              0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
+	
+	vec4 comp;
+	comp = depth * bitSh;
+	comp.xyz = fract(comp.xyz);
+	comp -= comp.xxyz * bitMsk;
+	gl_FragColor = comp;
+ #endif
+
+ #if 1
+	// 24 bit precision
+	const vec3 bitSh = vec3( 256 * 256,         256,           1);
+	const vec3 bitMsk = vec3(        0, 1.0 / 256.0, 1.0 / 256.0);
+	
+	vec3 comp;
+	comp = depth * bitSh;
+	comp.xy = fract(comp.xy);
+	comp -= comp.xxy * bitMsk;
+	gl_FragColor = vec4(comp, 1.0);
+ #endif
+
+ #if 0
+	// 8 bit precision
+	gl_FragColor = vec4(depth, depth, depth, 1);
+ #endif
+#else
+	gl_FragColor = vec4(0, 0, 0, 1);
+#endif
+}