From 70b5daf6a02ba292381a4b5a557d5cdf70a3c731 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Thu, 14 Sep 2023 18:20:41 -0700
Subject: [PATCH] add sRGB

---
 mod.zig  |  2 ++
 sRGB.zig | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 sRGB.zig

diff --git a/mod.zig b/mod.zig
index d23b33c3336e9a6f95c000fa39fa1652e1f1f8f5..57ad889c6ce4d4b1c786cfc962819e770258c28b 100644
--- a/mod.zig
+++ b/mod.zig
@@ -1,2 +1,4 @@
 const std = @import("std");
 const color = @This();
+
+pub const sRGB = @import("./sRGB.zig");
diff --git a/sRGB.zig b/sRGB.zig
new file mode 100644
index 0000000000000000000000000000000000000000..f52c17efbc3fdce8532a34bea39ff6fecb62210d
--- /dev/null
+++ b/sRGB.zig
@@ -0,0 +1,65 @@
+//! object representing a single color in the sRGB colorspace with channel values from 0-255
+
+const std = @import("std");
+const Self = @This();
+
+r: u8, // red value
+g: u8, // green value
+b: u8, // blue value
+a: u8, // alpha value
+
+pub fn initRGBA(r: u8, g: u8, b: u8, a: u8) Self {
+    return Self{
+        .r = r,
+        .g = g,
+        .b = b,
+        .a = a,
+    };
+}
+
+pub fn initRGB(r: u8, g: u8, b: u8) Self {
+    return initRGBA(r, g, b, 255);
+}
+
+pub fn parseHexConst(comptime input: *const [7:0]u8) Self {
+    comptime std.debug.assert(input[0] == '#');
+    return comptime initRGB(
+        std.fmt.parseInt(u8, input[1..3], 16) catch unreachable,
+        std.fmt.parseInt(u8, input[3..5], 16) catch unreachable,
+        std.fmt.parseInt(u8, input[5..7], 16) catch unreachable,
+    );
+}
+
+pub fn parseHex(input: []const u8) Self {
+    std.debug.assert(input.len == 7);
+    std.debug.assert(input[0] == '#');
+    return initRGB(
+        std.fmt.parseInt(u8, input[1..3], 16) catch unreachable,
+        std.fmt.parseInt(u8, input[3..5], 16) catch unreachable,
+        std.fmt.parseInt(u8, input[5..7], 16) catch unreachable,
+    );
+}
+
+pub fn eql(x: Self, y: Self) bool {
+    return x.r == y.r and x.g == y.g and x.b == y.b;
+}
+
+pub fn format(x: Self, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
+    _ = fmt;
+    _ = options;
+    if (x.a < 255) {
+        @setCold(true);
+        try writer.print("#{:0>2}{:0>2}{:0>2}{:0>2}", .{
+            std.fmt.fmtSliceHexLower(&.{x.r}),
+            std.fmt.fmtSliceHexLower(&.{x.g}),
+            std.fmt.fmtSliceHexLower(&.{x.b}),
+            std.fmt.fmtSliceHexLower(&.{x.a}),
+        });
+        return;
+    }
+    try writer.print("#{:0>2}{:0>2}{:0>2}", .{
+        std.fmt.fmtSliceHexLower(&.{x.r}),
+        std.fmt.fmtSliceHexLower(&.{x.g}),
+        std.fmt.fmtSliceHexLower(&.{x.b}),
+    });
+}
-- 
2.54.0