diff options
Diffstat (limited to 'render/vulkan/shaders/texture.frag')
| -rw-r--r-- | render/vulkan/shaders/texture.frag | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/render/vulkan/shaders/texture.frag b/render/vulkan/shaders/texture.frag index 8b5a0c8d..eab2c2d1 100644 --- a/render/vulkan/shaders/texture.frag +++ b/render/vulkan/shaders/texture.frag @@ -15,23 +15,31 @@ layout (constant_id = 0) const int TEXTURE_TRANSFORM = 0; #define TEXTURE_TRANSFORM_IDENTITY 0 #define TEXTURE_TRANSFORM_SRGB 1 -float srgb_to_linear(float x) { +float srgb_channel_to_linear(float x) { return max(x / 12.92, pow((x + 0.055) / 1.055, 2.4)); } +vec4 srgb_color_to_linear(vec4 color) { + if (color.a == 0) { + return vec4(0); + } + color.rgb /= color.a; + color.rgb = vec3( + srgb_channel_to_linear(color.r), + srgb_channel_to_linear(color.g), + srgb_channel_to_linear(color.b) + ); + color.rgb *= color.a; + return color; +} + 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 - ); + out_color = srgb_color_to_linear(val); } else { // TEXTURE_TRANSFORM_IDENTITY out_color = val; } out_color *= data.alpha; } - |