From b1a90a7f915e7779aad975a70b503788b0a1b228 Mon Sep 17 00:00:00 2001 From: raysan5 Date: Wed, 2 Sep 2015 02:44:16 +0200 Subject: Added some useful postprocessing shaders Shaders come in two flavours: - shaders/gl330: OpenGL 3.3+ (Windows, Linux, OSX) - shaders/gles100: OpenGL ES 2.0 (Android, RPI, HTML5) --- shaders/gl330/grayscale.fs | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 shaders/gl330/grayscale.fs (limited to 'shaders/gl330/grayscale.fs') diff --git a/shaders/gl330/grayscale.fs b/shaders/gl330/grayscale.fs new file mode 100644 index 00000000..38337e00 --- /dev/null +++ b/shaders/gl330/grayscale.fs @@ -0,0 +1,20 @@ +#version 330 + +in vec2 fragTexCoord; + +out vec4 fragColor; + +uniform sampler2D texture0; +uniform vec4 tintColor; + +// NOTE: Add here your custom variables + +void main() +{ + vec4 base = texture2D(texture0, fragTexCoord)*tintColor; + + // Convert to grayscale using NTSC conversion weights + float gray = dot(base.rgb, vec3(0.299, 0.587, 0.114)); + + fragColor = vec4(gray, gray, gray, tintColor.a); +} \ No newline at end of file -- cgit v1.2.3