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Fix colors in glium (srgb issue)

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This commit is contained in:
Emil Ernerfeldt
2020-04-16 23:10:42 +02:00
parent 49cbd3fe07
commit 74eeaf27ce
1 changed files with 30 additions and 0 deletions
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30
emigui_glium/src/painter.rs
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@@ -41,8 +41,18 @@ impl Painter {
in vec4 v_color; in vec4 v_color;
in vec2 v_tc; in vec2 v_tc;
out vec4 f_color; out vec4 f_color;
// glium expects linear output.
vec3 linear_from_srgb(vec3 srgb) {
bvec3 cutoff = lessThan(srgb, vec3(0.04045));
vec3 higher = pow((srgb + vec3(0.055)) / vec3(1.055), vec3(2.4));
vec3 lower = srgb / vec3(12.92);
return mix(higher, lower, cutoff);
}
void main() { void main() {
f_color = v_color; f_color = v_color;
f_color.rgb = linear_from_srgb(f_color.rgb);
f_color.a *= texture(u_sampler, v_tc).r; f_color.a *= texture(u_sampler, v_tc).r;
} }
" "
@@ -74,8 +84,18 @@ impl Painter {
uniform sampler2D u_sampler; uniform sampler2D u_sampler;
varying vec4 v_color; varying vec4 v_color;
varying vec2 v_tc; varying vec2 v_tc;
// glium expects linear output.
vec3 linear_from_srgb(vec3 srgb) {
bvec3 cutoff = lessThan(srgb, vec3(0.04045));
vec3 higher = pow((srgb + vec3(0.055)) / vec3(1.055), vec3(2.4));
vec3 lower = srgb / vec3(12.92);
return mix(higher, lower, cutoff);
}
void main() { void main() {
gl_FragColor = v_color; gl_FragColor = v_color;
gl_FragColor.rgb = linear_from_srgb(gl_FragColor.rgb);
gl_FragColor.a *= texture2D(u_sampler, v_tc).r; gl_FragColor.a *= texture2D(u_sampler, v_tc).r;
} }
", ",
@@ -107,8 +127,18 @@ impl Painter {
uniform sampler2D u_sampler; uniform sampler2D u_sampler;
varying mediump vec4 v_color; varying mediump vec4 v_color;
varying mediump vec2 v_tc; varying mediump vec2 v_tc;
// glium expects linear output.
vec3 linear_from_srgb(vec3 srgb) {
bvec3 cutoff = lessThan(srgb, vec3(0.04045));
vec3 higher = pow((srgb + vec3(0.055)) / vec3(1.055), vec3(2.4));
vec3 lower = srgb / vec3(12.92);
return mix(higher, lower, cutoff);
}
void main() { void main() {
gl_FragColor = v_color; gl_FragColor = v_color;
gl_FragColor.rgb = linear_from_srgb(gl_FragColor.rgb);
gl_FragColor.a *= texture2D(u_sampler, v_tc).r; gl_FragColor.a *= texture2D(u_sampler, v_tc).r;
} }
", ",