From 1d545449bb19148b45d2d92f213e1001a8eb527c Mon Sep 17 00:00:00 2001 From: raysan5 Date: Thu, 7 Apr 2016 12:32:32 +0200 Subject: Reviewed shaders and added comments --- examples/resources/shaders/glsl100/grayscale.fs | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 examples/resources/shaders/glsl100/grayscale.fs (limited to 'examples/resources/shaders/glsl100/grayscale.fs') diff --git a/examples/resources/shaders/glsl100/grayscale.fs b/examples/resources/shaders/glsl100/grayscale.fs new file mode 100644 index 00000000..f92ec335 --- /dev/null +++ b/examples/resources/shaders/glsl100/grayscale.fs @@ -0,0 +1,25 @@ +#version 100 + +precision mediump float; + +// Input vertex attributes (from vertex shader) +varying vec2 fragTexCoord; +varying vec4 fragColor; + +// Input uniform values +uniform sampler2D texture0; +uniform vec4 fragTintColor; + +// NOTE: Add here your custom variables + +void main() +{ + // Texel color fetching from texture sampler + vec4 texelColor = texture(texture0, fragTexCoord)*fragTintColor*fragColor; + + // Convert texel color to grayscale using NTSC conversion weights + float gray = dot(texelColor.rgb, vec3(0.299, 0.587, 0.114)); + + // Calculate final fragment color + gl_FragColor = vec4(gray, gray, gray, texelColor.a); +} \ No newline at end of file -- cgit v1.2.3