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[hb-info] Render colors in --list-palette 

Uses chafa if available
This commit is contained in:
Behdad Esfahbod 2023-01-24 16:59:44 -07:00
parent b684c6edd4
commit 7a29ded169
2 changed files with 91 additions and 2 deletions
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91
util/hb-info.cc
View File

@ -32,6 +32,10 @@
#include <hb-gobject.h>
#endif
#ifdef HAVE_CHAFA
# include <chafa.h>
#endif
const unsigned DEFAULT_FONT_SIZE = FONT_SIZE_UPEM;
const unsigned SUBPIXEL_BITS = 0;
@ -1202,6 +1206,81 @@ struct info_t :
}
#endif
#ifdef HAVE_CHAFA
GString *
_palette_chafa_str (unsigned palette_index)
{
unsigned count = hb_ot_color_palette_get_colors (face, palette_index, 0,
nullptr, nullptr);
hb_color_t *palette = (hb_color_t *) malloc (count * sizeof (hb_color_t));
hb_ot_color_palette_get_colors (face, palette_index, 0,
&count, palette);
#define REPEAT 8
hb_color_t *data = (hb_color_t *) malloc (count * REPEAT * sizeof (hb_color_t));
for (unsigned i = 0; i < count; i++)
for (unsigned j = 0; j < REPEAT; j++)
data[i * REPEAT + j] = palette[i];
free (palette);
palette = nullptr;
chafa_set_n_threads (1); // https://github.com/hpjansson/chafa/issues/125#issuecomment-1397475217
//
gchar **environ = g_get_environ ();
ChafaTermInfo *term_info = chafa_term_db_detect (chafa_term_db_get_default (),
environ);
ChafaCanvasMode mode;
ChafaPixelMode pixel_mode = CHAFA_PIXEL_MODE_SYMBOLS;
if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_DIRECT))
mode = CHAFA_CANVAS_MODE_TRUECOLOR;
else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_256))
mode = CHAFA_CANVAS_MODE_INDEXED_240;
else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_SET_COLOR_FGBG_16))
mode = CHAFA_CANVAS_MODE_INDEXED_16;
else if (chafa_term_info_have_seq (term_info, CHAFA_TERM_SEQ_INVERT_COLORS))
mode = CHAFA_CANVAS_MODE_FGBG_BGFG;
else
mode = CHAFA_CANVAS_MODE_FGBG;
ChafaSymbolMap *symbol_map = chafa_symbol_map_new ();
chafa_symbol_map_add_by_tags (symbol_map,
(ChafaSymbolTags) (CHAFA_SYMBOL_TAG_BLOCK));
ChafaCanvasConfig *config = chafa_canvas_config_new ();
chafa_canvas_config_set_canvas_mode (config, mode);
chafa_canvas_config_set_pixel_mode (config, pixel_mode);
chafa_canvas_config_set_cell_geometry (config, REPEAT, 1);
chafa_canvas_config_set_geometry (config, 2 * count, 1);
chafa_canvas_config_set_symbol_map (config, symbol_map);
chafa_canvas_config_set_color_extractor (config, CHAFA_COLOR_EXTRACTOR_MEDIAN);
chafa_canvas_config_set_work_factor (config, 1.0f);
ChafaCanvas *canvas = chafa_canvas_new (config);
chafa_canvas_draw_all_pixels (canvas,
G_BYTE_ORDER == G_BIG_ENDIAN
? CHAFA_PIXEL_BGRA8_UNASSOCIATED
: CHAFA_PIXEL_ARGB8_UNASSOCIATED,
(const guint8 *) data,
count * REPEAT,
1,
sizeof (hb_color_t));
free (data);
auto gs = chafa_canvas_print (canvas, term_info);
chafa_canvas_unref (canvas);
chafa_canvas_config_unref (config);
chafa_symbol_map_unref (symbol_map);
chafa_term_info_unref (term_info);
g_strfreev (environ);
return gs;
}
#endif
void
_list_palettes ()
{
@ -1244,7 +1323,17 @@ struct info_t :
}
}
printf ("%u %s %s\n", i, type, name);
#ifdef HAVE_CHAFA
if (verbose)
{
GString *chafa_str = _palette_chafa_str (i);
printf ("%u %s %-23s %*s\n", i, type, name,
(int) chafa_str->len, chafa_str->str);
g_string_free (chafa_str, TRUE);
}
else
#endif
printf ("%u %s %s\n", i, type, name);
}
}

2
util/meson.build
View File

@ -44,7 +44,7 @@ if conf.get('HAVE_GLIB', 0) == 1
hb_info = executable('hb-info', [hb_info_sources, gobject_enums_h],
cpp_args: cpp_args,
include_directories: [incconfig, incsrc],
dependencies: [util_deps, libharfbuzz_gobject_dep],
dependencies: [util_deps, libharfbuzz_gobject_dep, chafa_dep],
link_with: [libharfbuzz],
install: true,
)