1 files changed, 101 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/interface/reflectionmipF.glsl b/indra/newview/app_settings/shaders/class1/interface/reflectionmipF.glsl
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index 0000000000..9dd97a80b2
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+++ b/indra/newview/app_settings/shaders/class1/interface/reflectionmipF.glsl
@@ -0,0 +1,101 @@
+/** 
+ * @file reflectionmipF.glsl
+ *
+ * $LicenseInfo:firstyear=2022&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2022, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+// NOTE screenMap should always be texture channel 0 and 
+// depthmap should always be channel 1
+uniform sampler2DRect diffuseRect;
+uniform sampler2DRect depthMap;
+
+uniform float resScale;
+uniform float znear;
+uniform float zfar;
+
+VARYING vec2 vary_texcoord0;
+
+// get linear depth value given a depth buffer sample d and znear and zfar values
+float linearDepth(float d, float znear, float zfar);
+
+void main() 
+{
+#if 0
+    float w[9];
+
+    float c = 1.0/16.0;  //corner weight
+    float e = 1.0/8.0; //edge weight
+    float m = 1.0/4.0; //middle weight
+
+    //float wsum = c*4+e*4+m;
+
+    w[0] = c;   w[1] = e;    w[2] = c;
+    w[3] = e;    w[4] = m;     w[5] = e;
+    w[6] = c;   w[7] = e;    w[8] = c;
+    
+    vec2 tc[9];
+
+    float ed = 1;
+    float cd = 1;
+
+
+    tc[0] = vec2(-cd, cd);    tc[1] = vec2(0, ed);    tc[2] = vec2(cd, cd);
+    tc[3] = vec2(-ed, 0);    tc[4] = vec2(0, 0);    tc[5] = vec2(ed, 0);
+    tc[6] = vec2(-cd, -cd);    tc[7] = vec2(0, -ed);   tc[8] = vec2(cd, -1);
+
+    vec3 color = vec3(0,0,0);
+
+    for (int i = 0; i < 9; ++i)
+    {
+        color += texture2DRect(screenMap, vary_texcoord0.xy+tc[i]).rgb * w[i];
+        //color += texture2DRect(screenMap, vary_texcoord0.xy+tc[i]*2.0).rgb * w[i]*0.5;
+    }
+
+    //color /= wsum;
+
+    frag_color = vec4(color, 1.0);
+#else
+    vec2 depth_tc = vary_texcoord0.xy * resScale;
+    float depth = texture(depthMap, depth_tc).r;
+    float dist = linearDepth(depth, znear, zfar);
+
+    // convert linear depth to distance
+    vec3 v;
+    v.xy = depth_tc / 512.0 * 2.0 - 1.0;
+    v.z = 1.0;
+    v = normalize(v);
+    dist /= v.z;
+
+    vec3 col = texture2DRect(diffuseRect, vary_texcoord0.xy).rgb;
+    frag_color = vec4(col, dist/256.0); 
+#endif
+}