mirror of
https://github.com/curioustorvald/Terrarum.git
synced 2026-03-08 12:51:51 +09:00
35 lines
707 B
GLSL
35 lines
707 B
GLSL
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
in vec4 v_color;
|
|
in vec2 v_texCoords;
|
|
|
|
uniform sampler2D u_texture;
|
|
|
|
out vec4 fragColor;
|
|
|
|
const mat4 rgb_to_ycocg = mat4(
|
|
0.25, 1.0, -0.5, 0.0,
|
|
0.5, 0.0, 1.0, 0.0,
|
|
0.25, -1.0, -0.5, 0.0,
|
|
0.0, 0.0, 0.0, 1.0
|
|
);
|
|
|
|
const mat4 ycocg_to_rgb = mat4(
|
|
1.0, 1.0, 1.0, 0.0,
|
|
0.5, 0.0, -0.5, 0.0,
|
|
-0.5, 0.5, -0.5, 0.0,
|
|
0.0, 0.0, 0.0, 1.0
|
|
);
|
|
|
|
const vec2 boolean = vec2(0.0, 1.0);
|
|
|
|
void main() {
|
|
vec4 incolour = texture(u_texture, v_texCoords);
|
|
vec4 yog = rgb_to_ycocg * incolour; // vec4(Y, Co, Cg, A) where Y,A=[0,1]; Co,Cg=[-1,1]
|
|
|
|
vec4 scalar = vec4(1.0, 2.0, 2.0, 1.0);
|
|
|
|
fragColor = ycocg_to_rgb * (yog * scalar);
|
|
} |