mirror of
https://gitlab.com/MaddoScientisto/cirnogodot.git
synced 2026-06-01 10:45:33 +00:00
42 lines
No EOL
1.2 KiB
Text
42 lines
No EOL
1.2 KiB
Text
//SHADER ORIGINALY CREADED BY "paniq" FROM SHADERTOY
|
|
//MODIFIED AND PORTED TO GODOT BY AHOPNESS (@ahopness)
|
|
//LICENSE : CC0
|
|
//COMATIBLE WITH : GLES2, GLES3, WEBGL
|
|
//SHADERTOY LINK : https://www.shadertoy.com/view/MdcGzj
|
|
|
|
shader_type canvas_item;
|
|
|
|
uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
|
|
|
|
uniform float color_depth :hint_range(0.0, 255.0) = 100.0;
|
|
uniform float color_number :hint_range(0.0, 50.0) = 20.0;
|
|
|
|
const mat3 rgb2ycbcr = mat3(
|
|
vec3(0.299, -0.168736, 0.5),
|
|
vec3(0.587, -0.331264, -0.418688),
|
|
vec3(0.114, 0.5, -0.081312)
|
|
);
|
|
const mat3 ycbcr2rgb = mat3(
|
|
vec3(1.0, 1.0, 1.0),
|
|
vec3(0.0, -0.344136, 1.772),
|
|
vec3(1.402, -0.714136, 0.0)
|
|
);
|
|
|
|
// simulating 8:4:4 compression ratio (16bit)
|
|
vec3 compress_ycbcr_844 (vec3 rgb) {
|
|
vec3 ycbcr = rgb2ycbcr * rgb;
|
|
ycbcr.r = floor(ycbcr.r * color_depth + 0.5) / color_depth;
|
|
ycbcr.gb += 0.5;
|
|
ycbcr.gb = floor(ycbcr.gb * color_number + 0.5) / color_number;
|
|
ycbcr.gb -= 0.5;
|
|
return ycbcr2rgb * ycbcr;
|
|
}
|
|
|
|
|
|
void fragment(){
|
|
vec2 uv = FRAGCOORD.xy / (1.0 / SCREEN_PIXEL_SIZE).xy;
|
|
vec3 rgb = texture(SCREEN_TEXTURE, uv).rgb;
|
|
rgb = compress_ycbcr_844(rgb);
|
|
|
|
COLOR = vec4(rgb,1.0);
|
|
} |