first commit

tb/shader/TextureBrowser.fragsh

@@ -0,0 +1,43 @@
+#version 120
+
+/*
+ Copyright (C) 2010-2017 Kristian Duske
+ 
+ This file is part of TrenchBroom.
+ 
+ TrenchBroom is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+ 
+ TrenchBroom 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 General Public License for more details.
+ 
+ You should have received a copy of the GNU General Public License
+ along with TrenchBroom. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+uniform float Brightness;
+uniform sampler2D Texture;
+uniform bool ApplyTinting;
+uniform vec4 TintColor;
+uniform bool GrayScale;
+
+void main() {
+    gl_FragColor = texture2D(Texture, gl_TexCoord[0].st);
+    
+    gl_FragColor = vec4(vec3(Brightness / 2.0 * gl_FragColor), gl_FragColor.a);
+    gl_FragColor = clamp(2.0 * gl_FragColor, 0.0, 1.0);
+
+    if (GrayScale) {
+        float gray = dot(gl_FragColor.rgb, vec3(0.299, 0.587, 0.114));
+        gl_FragColor = vec4(gray, gray, gray, gl_FragColor.a);
+    }
+    
+    if (ApplyTinting) {
+        gl_FragColor = vec4(gl_FragColor.rgb * TintColor.rgb * TintColor.a, gl_FragColor.a);
+        gl_FragColor = clamp(2.0 * gl_FragColor, 0.0, 1.0);
+    }
+}