add v1.541 (Extreme)

shaders/world-1/composite4.fsh

@@ -0,0 +1,50 @@
+#version 120
+/* DRAWBUFFERS:6 */
+//overwrite buffer 6, final image is buffer 7
+
+#define Bloom
+#define bloom_strength 0.75
+#define composite4
+#include "/shaders.settings"
+
+#ifdef Bloom
+varying vec2 texcoord;
+varying float eyeAdapt;
+
+uniform sampler2D colortex6;
+
+uniform int isEyeInWater;
+uniform float rainStrength;
+uniform float viewWidth;
+uniform float viewHeight;
+#endif
+
+void main() {
+
+#ifdef Bloom
+	const int nSteps = 17;
+	const int center = 8;		//=nSteps-1 / 2
+
+	//huge gaussian blur for glare
+	vec3 blur = vec3(0.0);
+	float tw = 0.0;
+	for (int i = 0; i < nSteps; i++) {
+		float dist = abs(i-float(center))/center;
+		float weight = (exp(-(dist*dist)/ 0.28));
+		vec3 bsample = texture2D(colortex6,(texcoord.xy + vec2(1.0/viewWidth,1.0/viewHeight)*vec2(0.0,i-center))).rgb*3.0;
+
+		blur += bsample*weight;
+		tw += weight;
+	}
+	blur /= tw;
+
+	vec3 glow = blur * bloom_strength;
+	vec3 overglow = glow*pow(length(glow)*2.0,2.8)*2.0;
+
+	vec3 finalColor = (overglow+glow*1.15)*(1+isEyeInWater*10.0+(pow(rainStrength,3.0)*7.0/pow(eyeAdapt,1.0)))*1.2;
+
+	gl_FragData[0] = vec4(finalColor, 1.0);
+#else
+	gl_FragData[0] = vec4(0.0);
+#endif
+}