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Fix #6345

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@m4rw3r this is fixing a bug in #6218. Seems fairly straightforward but
since it's your code, please review.
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Kovid Goyal 2023-06-07 16:23:30 +05:30
parent 5ef5b5f363
commit 3ae489b151
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GPG key ID: 06BC317B515ACE7C
2 changed files with 13 additions and 3 deletions
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10
kitty/blit_fragment.glsl
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@ -5,6 +5,16 @@ uniform sampler2D image;
in vec2 texcoord;
out vec4 color;
float linear2srgb(float x) {
// Linear to sRGB conversion.
float lower = 12.92 * x;
float upper = 1.055 * pow(x, 1.0f / 2.4f) - 0.055f;
return mix(lower, upper, step(0.0031308f, x));
}
void main() {
color = texture(image, texcoord);
color.a = linear2srgb(color.a);
}

6
kitty/cell_fragment.glsl
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@ -240,9 +240,9 @@ void main() {
#ifdef FOREGROUND
final_color = calculate_foreground(); // pre-multiplied foreground
// This is the last pass, adjust alpha to compensate for gamma-incorrect
// blending in compositor:
final_color.a = linear2srgb(final_color.a);
// This is the last pass, called both with transparency and without but not in draw_cells_simple().
// When transparent it is drawn into a framebuffer and linear2srgb() will be done
// when blitting that framebuffer. When not transparent there is not need to do linear2srgb() anyway.
#endif
}