30231f1149I tried to make it a little bit easier to follow and get rid of the need to call back to context.x.y.z (as much) [I hope]
69 lines
2 KiB
Zig
69 lines
2 KiB
Zig
// SPDX-FileCopyrightText: 2026 Ben Buhse <me@benbuhse.email>
|
|
//
|
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
pub const allocator = std.heap.c_allocator;
|
|
|
|
pub const RiverColor = struct {
|
|
red: u32,
|
|
green: u32,
|
|
blue: u32,
|
|
alpha: u32,
|
|
};
|
|
|
|
/// Parse a color in the format 0xRRGGBB or 0xRRGGBBAA and convert it to
|
|
/// 32-bit color values (used by Window.set_borders in rwm).
|
|
pub fn parseRgba(s: []const u8) !RiverColor {
|
|
if (s.len != 8 and s.len != 10) return error.InvalidRgba;
|
|
if (s[0] != '0' or s[1] != 'x') return error.InvalidRgba;
|
|
|
|
// If the color is 0xRRGGBB, add FF for the alpha channel
|
|
var color = try fmt.parseUnsigned(u32, s[2..], 16);
|
|
if (s.len == 8) {
|
|
color <<= 8;
|
|
color |= 0xff;
|
|
}
|
|
|
|
const bytes: [4]u8 = @as([4]u8, @bitCast(color));
|
|
return parseRgbaHelper(bytes);
|
|
}
|
|
|
|
/// Parse a color in the format 0xRRGGBB or 0xRRGGBBAA and convert it to
|
|
/// 32-bit color values (used by Window.set_borders in rwm) at comptime.
|
|
pub fn parseRgbaComptime(comptime s: []const u8) RiverColor {
|
|
if (s.len != 8 and s.len != 10) @compileError("Invalid RGBA");
|
|
if (s[0] != '0' or s[1] != 'x') @compileError("Invalid RGBA");
|
|
|
|
// If the color is 0xRRGGBB, add FF for the alpha channel
|
|
comptime var color = try fmt.parseUnsigned(u32, s[2..], 16);
|
|
if (s.len == 8) {
|
|
color <<= 8;
|
|
color |= 0xff;
|
|
}
|
|
|
|
const bytes = @as([4]u8, @bitCast(color));
|
|
return parseRgbaHelper(bytes);
|
|
}
|
|
|
|
fn parseRgbaHelper(bytes: [4]u8) RiverColor {
|
|
const r: u32 = bytes[3];
|
|
const g: u32 = bytes[2];
|
|
const b: u32 = bytes[1];
|
|
const a: u32 = bytes[0];
|
|
|
|
// To convert from an 8-bit color to 32-bit color, we need to do
|
|
// color * 2^32 / 2^8
|
|
// which is equivalent to
|
|
// color * 2^24
|
|
// or, in other words,
|
|
// color << 24
|
|
return .{
|
|
.red = r << 24,
|
|
.green = g << 24,
|
|
.blue = b << 24,
|
|
.alpha = a << 24,
|
|
};
|
|
}
|
|
|
|
const std = @import("std");
|
|
const fmt = std.fmt;
|