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stop searching for color matches if this color is an exact match

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probably very rarely ever an optimization in real-world use, but it
still seems like the logical thing to do
This commit is contained in:
Gered 2022-07-18 21:21:40 -04:00
parent d9739b4e3e
commit fb101db0ac
1 changed files with 12 additions and 8 deletions
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20
libretrogd/src/graphics/palette.rs
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@ -483,16 +483,20 @@ impl Palette {
for (index, color) in self.colors.iter().enumerate() { for (index, color) in self.colors.iter().enumerate() {
let (this_r, this_g, this_b) = from_rgb32(*color); let (this_r, this_g, this_b) = from_rgb32(*color);
// this comparison method is using the sRGB Euclidean formula described here: if r == this_r && g == this_g && b == this_b {
// https://en.wikipedia.org/wiki/Color_difference return index as u8;
} else {
// this comparison method is using the sRGB Euclidean formula described here:
// https://en.wikipedia.org/wiki/Color_difference
let distance = abs_diff(this_r, r) as u32 let distance = abs_diff(this_r, r) as u32
+ abs_diff(this_g, g) as u32 + abs_diff(this_g, g) as u32
+ abs_diff(this_b, b) as u32; + abs_diff(this_b, b) as u32;
if distance < closest_distance { if distance < closest_distance {
closest = index as u8; closest = index as u8;
closest_distance = distance; closest_distance = distance;
}
} }
} }