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vulkan: implement all alpha modes

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This commit is contained in:
Julian Orth 2026-02-21 14:10:59 +01:00
parent 69ca5d92e7
commit 56a6012a7c
12 changed files with 62 additions and 11 deletions
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8
src/gfx_apis/vulkan/shaders/tex.frag
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@ -8,6 +8,7 @@
#include "tex.common.glsl"
#include "tex_set.glsl"
#include "eotfs.glsl"
#include "alpha_modes.glsl"
layout(set = 0, binding = 0) uniform sampler sam;
layout(location = 0) in vec2 tex_pos;
@ -15,12 +16,15 @@ layout(location = 0) out vec4 out_color;
void main() {
vec4 c = textureLod(sampler2D(tex, sam), tex_pos, 0);
if (eotf != inv_eotf || has_matrix) {
if (eotf != inv_eotf || has_matrix || alpha_mode != AM_PREMULTIPLIED_ELECTRICAL) {
vec3 rgb = c.rgb;
if (src_has_alpha) {
if (src_has_alpha && alpha_mode == AM_PREMULTIPLIED_ELECTRICAL) {
rgb /= mix(c.a, 1.0, c.a == 0.0);
}
rgb = apply_eotf(rgb);
if (src_has_alpha && alpha_mode == AM_PREMULTIPLIED_OPTICAL) {
rgb /= mix(c.a, 1.0, c.a == 0.0);
}
if (has_matrix) {
rgb = (cm_data.matrix * vec4(rgb, 1.0)).rgb;
}