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Added color dither

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This commit is contained in:
Joshua Barretto 2023-05-31 19:10:09 +01:00
parent 2a9e43b847
commit 2064ad5d80
2 changed files with 27 additions and 3 deletions
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26
assets/voxygen/shaders/postprocess-frag.glsl
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@ -166,6 +166,23 @@ vec3 aa_sample(vec2 uv, vec2 off) {
}
#endif
#ifdef EXPERIMENTAL_COLORDITHERING
float dither(ivec2 p, float level) {
// Bayer dithering
int dither[8][8] = {
{ 0, 32, 8, 40, 2, 34, 10, 42}, /* 8x8 Bayer ordered dithering */
{48, 16, 56, 24, 50, 18, 58, 26}, /* pattern. Each input pixel */
{12, 44, 4, 36, 14, 46, 6, 38}, /* is scaled to the 0..63 range */
{60, 28, 52, 20, 62, 30, 54, 22}, /* before looking in this table */
{ 3, 35, 11, 43, 1, 33, 9, 41}, /* to determine the action. */
{51, 19, 59, 27, 49, 17, 57, 25},
{15, 47, 7, 39, 13, 45, 5, 37},
{63, 31, 55, 23, 61, 29, 53, 21}
};
return step((dither[p.x % 8][p.y % 8]+1) * 0.016, level);
}
#endif
void main() {
#ifdef EXPERIMENTAL_BAREMINIMUM
tgt_color = vec4(texture(sampler2D(t_src_color, s_src_color), uv).rgb, 1);
@ -315,9 +332,14 @@ void main() {
#endif
#ifdef EXPERIMENTAL_NEWSPAPER
float nz = hash_three(uvec3(uvec2(uv * screen_res.xy), tick.x * dot(fract(uv * 10) + 5, vec2(1)) * 0.3));
float nz = hash_three(uvec3(uvec2(uv * screen_res.xy), tick.x * dot(fract(uv * 10) + 5, vec2(1)) * 0.2));
nz = (nz > 0.5) ? (pow(nz * 2 - 1, 1.5) * 0.5 + 0.5) : (pow(nz * 2, 1/1.5) * 0.5);
final_color.rgb = vec3(step(nz, length(final_color.rgb))) * mix(vec3(1, 0.5, 0.3), normalize(final_color.rgb), 0.05);
final_color.rgb = vec3(step(nz, length(final_color.rgb))) * vec3(1, 0.5, 0.3);
#else
#ifdef EXPERIMENTAL_COLORDITHERING
float d = dither(ivec2(uv * screen_res.xy), sqrt(length(final_color.rgb) * 0.25));
final_color.rgb = vec3(d) * sqrt(normalize(final_color.rgb));
#endif
#endif
tgt_color = vec4(final_color.rgb, 1);

4
voxygen/src/render/mod.rs
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@ -537,6 +537,8 @@ pub enum ExperimentalShader {
/// Prefer using physically-based values for various rendering parameters,
/// where possible.
Photorealistic,
/// A dithered newspaper effect.
/// A noisy newspaper effect.
Newspaper,
/// A colorful dithering effect.
ColorDithering,
}