1 files changed, 48 insertions, 0 deletions
diff --git a/src/color.c b/src/color.c
new file mode 100644
index 0000000..f6b3275
--- /dev/null
+++ b/src/color.c
@@ -0,0 +1,48 @@
+#include <stdlib.h>
+#include <string.h>
+#include "color.h"
+#include "log.h"
+
+struct color hex_to_color(const char *hex)
+{
+	if (hex[0] == '#') {
+		hex++;
+	}
+
+	uint32_t val = 0;
+	size_t len = strlen(hex);
+
+	if (len == 3) {
+		char str[] = {
+			hex[0], hex[0],
+			hex[1], hex[1],
+			hex[2], hex[2],
+			'\0'};
+		val = strtol(str, NULL, 16);
+		val <<= 8;
+		val |= 0xFFu;
+	} else if (len == 4) {
+		char str[] = {
+			hex[0], hex[0],
+			hex[1], hex[1],
+			hex[2], hex[2],
+			hex[3], hex[3],
+			'\0'};
+		val = strtol(str, NULL, 16);
+	} else if (len == 6) {
+		val = strtol(hex, NULL, 16);
+		val <<= 8;
+		val |= 0xFFu;
+	} else if (len == 8) {
+		val = strtol(hex, NULL, 16);
+	} else {
+		log_error("Invalid hex color %s\n", hex);
+	}
+
+	return (struct color) {
+		.r = ((val & 0xFF000000u) >> 24) / 255.0f,
+		.g = ((val & 0x00FF0000u) >> 16) / 255.0f,
+		.b = ((val & 0x0000FF00u) >> 8)  / 255.0f,
+		.a = ((val & 0x000000FFu) >> 0)  / 255.0f,
+	};
+}