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src/theme.c: support inline alpha encoding like #aabbccff

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.. and mark the current `#rrggbb aaa` encoding as deprecated.
This commit is contained in:
Consolatis 2024-04-07 17:25:40 +02:00 • committed by Johan Malm
parent 45c60de263
commit 2c2341530b
2 changed files with 25 additions and 9 deletions
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6
docs/labwc-theme.5.scd
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@ -34,7 +34,11 @@ labwc-config(5).
*color*
Colors can be specified by either of the following:
- #rrggbb (hexadecimal RGB values)
- #rrggbb aaa (same but with decimal alpha value)
- #rrggbb aaa (same but with decimal alpha value percentage)
- #rrggbbaa (same but with inline alpha value in hex encoding)
Note: the #rrggbb aaa notation is deprecated starting from
labwc 0.7.2 and may be removed in future releases.
*justification*
Justification determines the horizontal alignment of text.

22
src/theme.c
View file

@ -404,15 +404,27 @@ parse_hexstr(const char *hex, float *rgba)
rgba[0] = (hex_to_dec(hex[1]) * 16 + hex_to_dec(hex[2])) / 255.0;
rgba[1] = (hex_to_dec(hex[3]) * 16 + hex_to_dec(hex[4])) / 255.0;
rgba[2] = (hex_to_dec(hex[5]) * 16 + hex_to_dec(hex[6])) / 255.0;
if (strlen(hex) > 7) {
rgba[3] = atoi(hex + 7) / 100.0;
rgba[3] = 1.0;
size_t len = strlen(hex);
if (len >= 9 && hex[7] == ' ') {
/* Deprecated #aabbcc 100 alpha encoding to support openbox themes */
rgba[3] = atoi(hex + 8) / 100.0;
wlr_log(WLR_ERROR,
"The theme uses deprecated alpha notation %s, please convert to "
"#rrggbbaa to ensure your config works on newer labwc releases", hex);
} else if (len == 9) {
/* Inline alpha encoding like #aabbccff */
rgba[3] = (hex_to_dec(hex[7]) * 16 + hex_to_dec(hex[8])) / 255.0;
} else if (len > 7) {
/* More than just #aabbcc */
wlr_log(WLR_ERROR, "invalid alpha color encoding: '%s'", hex);
}
/* Pre-multiply everything as expected by wlr_scene */
rgba[0] *= rgba[3];
rgba[1] *= rgba[3];
rgba[2] *= rgba[3];
} else {
rgba[3] = 1.0;
}
}
static enum lab_justification