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#version 450
layout(set = 0, binding = 0) uniform sampler2D tex;
layout(location = 0) in vec2 uv;
layout(location = 0) out vec4 out_color;
layout(push_constant) uniform UBO {
layout(offset = 80) float alpha;
} data;
layout (constant_id = 0) const int TEXTURE_TRANSFORM = 0;
// Matches enum wlr_vk_texture_transform
#define TEXTURE_TRANSFORM_IDENTITY 0
#define TEXTURE_TRANSFORM_SRGB 1
float srgb_to_linear(float x) {
return max(x / 12.92, pow((x + 0.055) / 1.055, 2.4));
}
void main() {
vec4 val = textureLod(tex, uv, 0);
if (TEXTURE_TRANSFORM == TEXTURE_TRANSFORM_SRGB) {
out_color = vec4(
srgb_to_linear(val.r),
srgb_to_linear(val.g),
srgb_to_linear(val.b),
val.a
);
} else { // TEXTURE_TRANSFORM_IDENTITY
out_color = val;
}
out_color *= data.alpha;
}
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