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Round border-*-width values to pixels in geckolib.

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This commit is contained in:
Cameron McCormack 2016-05-10 10:58:03 +10:00
parent a834bc1ec7
commit 4c249968d9
2 changed files with 23 additions and 2 deletions
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11
ports/geckolib/properties.mako.rs
View file

@ -31,6 +31,7 @@ use style::properties::make_cascade_vec;
use style::properties::style_struct_traits::*;
use gecko_style_structs::{nsStyleUnion, nsStyleUnit};
use values::{ToGeckoStyleCoord, convert_rgba_to_nscolor, convert_nscolor_to_rgba};
use values::round_border_to_device_pixels;
#[derive(Clone)]
pub struct GeckoComputedValues {
@ -264,9 +265,14 @@ def set_gecko_property(ffi_name, expr):
<%call expr="impl_color_copy(ident, gecko_ffi_name, color_flags_ffi_name)"></%call>
</%def>
<%def name="impl_app_units(ident, gecko_ffi_name, need_clone)">
<%def name="impl_app_units(ident, gecko_ffi_name, need_clone, round_to_pixels=False)">
fn set_${ident}(&mut self, v: longhands::${ident}::computed_value::T) {
% if round_to_pixels:
let au_per_device_px = Au(self.gecko.mTwipsPerPixel);
self.gecko.${gecko_ffi_name} = round_border_to_device_pixels(v, au_per_device_px).0;
% else:
self.gecko.${gecko_ffi_name} = v.0;
% endif
}
<%call expr="impl_simple_copy(ident, gecko_ffi_name)"></%call>
%if need_clone:
@ -499,7 +505,8 @@ fn static_assert() {
<% impl_color("border_%s_color" % side.ident, "mBorderColor[%s]" % side.index,
color_flags_ffi_name="mBorderStyle[%s]" % side.index) %>
<% impl_app_units("border_%s_width" % side.ident, "mComputedBorder.%s" % side.ident, need_clone=False) %>
<% impl_app_units("border_%s_width" % side.ident, "mComputedBorder.%s" % side.ident, need_clone=False,
round_to_pixels=True) %>
fn border_${side.ident}_has_nonzero_width(&self) -> bool {
self.gecko.mComputedBorder.${side.ident} != 0

14
ports/geckolib/values.rs
View file

@ -2,8 +2,10 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use app_units::Au;
use cssparser::RGBA;
use gecko_style_structs::{nsStyleUnion, nsStyleUnit};
use std::cmp::max;
use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
pub trait ToGeckoStyleCoord {
@ -81,3 +83,15 @@ pub fn convert_nscolor_to_rgba(color: u32) -> RGBA {
alpha: (((color >> 24) & 0xff) as f32) / 255.0,
}
}
#[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 {
max(au_per_device_px, Au(width.0 / au_per_device_px.0 * au_per_device_px.0))
}
}