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[hb-view] Improve color parsing 

Now supports 3, 4, 6, 8 digit colors.
This commit is contained in:
Behdad Esfahbod 2023-01-20 11:24:35 -07:00
parent dc4af478d1
commit 03e2e58642
2 changed files with 47 additions and 6 deletions
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11
util/helper-cairo.hh
View File

@ -130,10 +130,11 @@ helper_cairo_create_scaled_font (const font_options_t *font_opts,
{
palette_index = HB_PAINT_PALETTE_INDEX_CUSTOM;
char **entries = g_strsplit (view_opts->custom_palette, ",", -1);
for (unsigned int i = 0; entries[i]; i++)
for (unsigned i = 0; entries[i]; i++)
{
unsigned int fr, fg, fb, fa;
if (sscanf (entries[i], "%2x%2x%2x%2x", &fr, &fg, &fb, &fa) == 4)
unsigned fr, fg, fb, fa;
fr = fg = fb = fa = 0;
parse_color (entries[i], fr, fg,fb, fa);
cairo_font_options_set_custom_palette_color (font_options, i, fr / 255., fg / 255., fb / 255., fa / 255.);
}
g_strfreev (entries);
@ -510,10 +511,10 @@ helper_cairo_create_context (double w, double h,
const char *color;
br = bg = bb = ba = 255;
color = view_opts->back ? view_opts->back : DEFAULT_BACK;
sscanf (color + (*color=='#'), "%2x%2x%2x%2x", &br, &bg, &bb, &ba);
parse_color (color, br, bg, bb, ba);
fr = fg = fb = 0; fa = 255;
color = view_opts->fore ? view_opts->fore : DEFAULT_FORE;
sscanf (color + (*color=='#'), "%2x%2x%2x%2x", &fr, &fg, &fb, &fa);
parse_color (color, fr, fg, fb, fa);
if (content == CAIRO_CONTENT_ALPHA)
{

40
util/options.hh
View File

@ -242,4 +242,44 @@ __inline float scalbnf (float x, int exp)
}
#endif
static inline bool
parse_color (const char *s,
unsigned &r,
unsigned &g,
unsigned &b,
unsigned &a)
{
bool ret = false;
while (*s == ' ') s++;
if (*s == '#') s++;
unsigned sr, sg, sb, sa;
sa = 255;
if (sscanf (s, "%2x%2x%2x%2x", &sr, &sg, &sb, &sa) <= 2)
{
if (sscanf (s, "%1x%1x%1x%1x", &sr, &sg, &sb, &sa) >= 3)
{
sr *= 17;
sg *= 17;
sb *= 17;
sa *= 17;
ret = true;
}
}
else
ret = true;
if (ret)
{
r = sr;
g = sg;
b = sb;
a = sa;
}
return ret;
}
#endif