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style: Document the remaining public parts of Gecko's values module.

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Emilio Cobos Álvarez 2017-01-02 04:57:22 +01:00
parent 632c99676b
commit 94f8c0fc63
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1 changed files with 7 additions and 3 deletions
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10
components/style/gecko/values.rs
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@ -4,6 +4,8 @@
#![allow(unsafe_code)]
//! Different kind of helpers to interact with Gecko values.
use app_units::Au;
use cssparser::RGBA;
use gecko_bindings::structs::{nsStyleCoord, StyleShapeRadius};
@ -221,6 +223,7 @@ impl GeckoStyleCoordConvertible for None_ {
}
}
/// Convert a given RGBA value to `nscolor`.
pub fn convert_rgba_to_nscolor(rgba: &RGBA) -> u32 {
(((rgba.alpha * 255.0).round() as u32) << 24) |
(((rgba.blue * 255.0).round() as u32) << 16) |
@ -228,6 +231,7 @@ pub fn convert_rgba_to_nscolor(rgba: &RGBA) -> u32 {
((rgba.red * 255.0).round() as u32)
}
/// Convert a given `nscolor` to a Servo RGBA value.
pub fn convert_nscolor_to_rgba(color: u32) -> RGBA {
RGBA {
red: ((color & 0xff) as f32) / 255.0,
@ -237,11 +241,11 @@ pub fn convert_nscolor_to_rgba(color: u32) -> RGBA {
}
}
/// Round `width` down to the nearest device pixel, but any non-zero value that
/// would round down to zero is clamped to 1 device pixel. Used for storing
/// computed values of border-*-width and outline-width.
#[inline]
pub fn round_border_to_device_pixels(width: Au, au_per_device_px: Au) -> Au {
// Round width down to the nearest device pixel, but any non-zero value that
// would round down to zero is clamped to 1 device pixel. Used for storing
// computed values of border-*-width and outline-width.
if width == Au(0) {
Au(0)
} else {