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Added dithering as an ALS post-processing effect to prevent banding

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Fernando García Liñán 2019-04-21 18:53:19 +02:00
parent 6e6258744a
commit 6d58c143c0
1 changed files with 6 additions and 0 deletions
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6
Shaders/filters-ALS.frag
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@ -20,6 +20,7 @@ uniform bool use_IR_vision;
uniform int display_xsize; uniform int display_xsize;
uniform int display_ysize; uniform int display_ysize;
float rand2D(in vec2 co);
float Noise2D(in vec2 coord, in float wavelength); float Noise2D(in vec2 coord, in float wavelength);
vec3 gamma_correction (in vec3 color) { vec3 gamma_correction (in vec3 color) {
@ -108,6 +109,11 @@ return color;
vec3 filter_combined (in vec3 color) { vec3 filter_combined (in vec3 color) {
// Apply some dithering to eliminate banding caused by rendering to a
// 32 bpp framebuffer
float dither_noise = rand2D(gl_FragCoord.xy);
color += mix(-0.5/255.0, 0.5/255.0, dither_noise);
if (use_filtering == false) if (use_filtering == false)
{ {
return color; return color;