Skip to content

[Merged by Bors] - Add conversions from Color to u32 #4088

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
Azorlogh wants to merge 3 commits into from
Closed

[Merged by Bors] - Add conversions from Color to u32 #4088

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
0c0125c
add Color::as_rgba_u32 and Color::as_linear_rgba_u32
Azorlogh Mar 3, 2022
d8b1508
fix comment typo
Azorlogh Mar 4, 2022
a64ec66
improve comment
Azorlogh Mar 7, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
94 changes: 93 additions & 1 deletion crates/bevy_render/src/color/mod.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -414,7 +414,7 @@ impl Color {
}
}

/// Converts a `Color` to a `[f32; 4]` from linear RBG colorspace
/// Converts a `Color` to a `[f32; 4]` from linear RGB colorspace
#[inline]
pub fn as_linear_rgba_f32(self: Color) -> [f32; 4] {
match self {
Expand Down Expand Up @@ -487,6 +487,98 @@ impl Color {
} => [hue, saturation, lightness, alpha],
}
}

/// Converts Color to a u32 from sRGB colorspace.
///
/// Maps the RGBA channels in RGBA order to a little-endian byte array (GPUs are little-endian).
/// A will be the most significant byte and R the least significant.
pub fn as_rgba_u32(self: Color) -> u32 {
match self {
Color::Rgba {
red,
green,
blue,
alpha,
} => u32::from_le_bytes([
(red * 255.0) as u8,
(green * 255.0) as u8,
(blue * 255.0) as u8,
(alpha * 255.0) as u8,
]),
Color::RgbaLinear {
red,
green,
blue,
alpha,
} => u32::from_le_bytes([
(red.linear_to_nonlinear_srgb() * 255.0) as u8,
(green.linear_to_nonlinear_srgb() * 255.0) as u8,
(blue.linear_to_nonlinear_srgb() * 255.0) as u8,
(alpha * 255.0) as u8,
]),
Color::Hsla {
hue,
saturation,
lightness,
alpha,
} => {
let [red, green, blue] =
HslRepresentation::hsl_to_nonlinear_srgb(hue, saturation, lightness);
u32::from_le_bytes([
(red * 255.0) as u8,
(green * 255.0) as u8,
(blue * 255.0) as u8,
(alpha * 255.0) as u8,
])
}
}
}

/// Converts Color to a u32 from linear RGB colorspace.
///
/// Maps the RGBA channels in RGBA order to a little-endian byte array (GPUs are little-endian).
/// A will be the most significant byte and R the least significant.
pub fn as_linear_rgba_u32(self: Color) -> u32 {
match self {
Color::Rgba {
red,
green,
blue,
alpha,
} => u32::from_le_bytes([
(red.nonlinear_to_linear_srgb() * 255.0) as u8,
(green.nonlinear_to_linear_srgb() * 255.0) as u8,
(blue.nonlinear_to_linear_srgb() * 255.0) as u8,
(alpha * 255.0) as u8,
]),
Color::RgbaLinear {
red,
green,
blue,
alpha,
} => u32::from_le_bytes([
(red * 255.0) as u8,
(green * 255.0) as u8,
(blue * 255.0) as u8,
(alpha * 255.0) as u8,
]),
Color::Hsla {
hue,
saturation,
lightness,
alpha,
} => {
let [red, green, blue] =
HslRepresentation::hsl_to_nonlinear_srgb(hue, saturation, lightness);
u32::from_le_bytes([
(red.nonlinear_to_linear_srgb() * 255.0) as u8,
(green.nonlinear_to_linear_srgb() * 255.0) as u8,
(blue.nonlinear_to_linear_srgb() * 255.0) as u8,
(alpha * 255.0) as u8,
])
}
}
}
}

impl Default for Color {
Expand Down