Intenté los mismos comandos y obtuve los mismos resultados.
$ printf "\u2318" | convert -size 100x100 label:@- \
-font unifont-Medium command.png
Sin embargo, cambiar al Unicode para la letra G funciona bien:
$ printf "\u0047" | convert -size 100x100 label:@- \
-font unifont-Medium command.png
Publicaría esta pregunta en el sitio del Discurso de ImageMagick para ver por qué ocurre esto. Puedo ayudarlo si no está seguro de cómo hacer esto o proceder.
Conversión de depuración
Puede agregar el -debug annotate
interruptor para ver qué convert
está haciendo.
Ejemplo
$ printf "\u2318" | convert -size 100x100 label:@- -font unifont-Medium -pointsize 40 -debug annotate command.png
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 12
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 6.375; height: 14; ascent: 11; descent: -3; max advance: 24; bounds: 0.625,0 6.78125,8; origin: 7,0; pixels per em: 12,12; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 12
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 6.375; height: 14; ascent: 11; descent: -3; max advance: 24; bounds: 0.625,0 6.78125,8; origin: 7,0; pixels per em: 12,12; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 24
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 12.75; height: 28; ascent: 22; descent: -5; max advance: 48; bounds: 1.25,0 13.5781,18; origin: 15,0; pixels per em: 24,24; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 48
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 25.5156; height: 55; ascent: 43; descent: -10; max advance: 96; bounds: 2.48438,0 27.1406,35.5; origin: 29,0; pixels per em: 48,48; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.010u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 96
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 53.0312; height: 110; ascent: 87; descent: -20; max advance: 192; bounds: 4.96875,0 54.2812,70; origin: 59,0; pixels per em: 96,96; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 96
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 53.0312; height: 110; ascent: 87; descent: -20; max advance: 192; bounds: 4.96875,0 54.2812,70; origin: 59,0; pixels per em: 96,96; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 95
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 52.0781; height: 109; ascent: 86; descent: -20; max advance: 190; bounds: 4.92188,0 53.7188,70; origin: 58,0; pixels per em: 95,95; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 94
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 51.1406; height: 108; ascent: 85; descent: -20; max advance: 188; bounds: 4.85938,0 53.1562,68; origin: 57,0; pixels per em: 94,94; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 93
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 51.1875; height: 107; ascent: 84; descent: -20; max advance: 186; bounds: 4.8125,0 52.5781,67; origin: 57,0; pixels per em: 93,93; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 92
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 50.2344; height: 106; ascent: 83; descent: -19; max advance: 184; bounds: 4.76562,0 52.0156,67; origin: 56,0; pixels per em: 92,92; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.020 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 91
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 50.2969; height: 105; ascent: 82; descent: -19; max advance: 182; bounds: 4.70312,0 51.4531,65.4688; origin: 56,0; pixels per em: 91,91; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 90
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 49.3438; height: 103; ascent: 81; descent: -19; max advance: 180; bounds: 4.65625,0 50.8906,65.4688; origin: 55,0; pixels per em: 90,90; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 89
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 48.3906; height: 102; ascent: 81; descent: -19; max advance: 178; bounds: 4.60938,0 50.3281,64; origin: 54,0; pixels per em: 89,89; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 88
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 48.4375; height: 101; ascent: 80; descent: -19; max advance: 176; bounds: 4.5625,0 49.7656,64; origin: 54,0; pixels per em: 88,88; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 87
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 47.5; height: 100; ascent: 79; descent: -18; max advance: 174; bounds: 4.5,0 49.1875,63; origin: 53,0; pixels per em: 87,87; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 86
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 47.5469; height: 99; ascent: 78; descent: -18; max advance: 172; bounds: 4.45312,0 48.625,63; origin: 53,0; pixels per em: 86,86; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 86
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/GetTypeMetrics/798/Annotate
Metrics: text: ⌘; width: 47.5469; height: 99; ascent: 78; descent: -18; max advance: 172; bounds: 4.45312,0 48.625,63; origin: 53,0; pixels per em: 86,86; underline position: -5.0625; underline thickness: 3.35938
2014-04-10T09:37:04-04:00 0:00.030 0.020u 6.7.8 Annotate convert[16619]: annotate.c/RenderFreetype/1220/Annotate
Font /usr/share/fonts/msttcorefonts/arialbd.ttf; font-encoding none; text-encoding none; pointsize 86
ACTUALIZACIÓN # 1 - Depuración adicional
Este problema me estaba molestando, así que creo que finalmente lo he resuelto. El problema es la selección de la fuente, y no poder mostrar ese glifo en particular.
En primer lugar, puede usar este comando para ver qué fuentes tiene disponibles convert
. Entonces, comencemos allí.
$ convert -list font | head -8
Path: /etc/ImageMagick/type-ghostscript.xml
Font: AvantGarde-Book
family: AvantGarde
style: Normal
stretch: Normal
weight: 400
glyphs: /usr/share/fonts/default/Type1/a010013l.pfb
...
Lo anterior muestra una muestra, cada fuente tiene líneas similares a las anteriores. Por cierto, ejecutar este comando muestra que tenemos varios cientos de fuentes:
$ convert -list font | grep Font | wc -l
262
A continuación, vamos a pasar por la tarea de codificar nuestro personaje, \u2318
usando cada fuente que tengamos. Esto suena complicado pero es bastante trivial con algunos liners bien pensados a través de Bash.
$ for i in $(convert -list font | grep Font | awk '{print $2}'); \
do convert -font $i -pointsize 36 label:⌘ ${i}.gif;done
Este fragmento utilizará un bucle for para ejecutar cada fuente, ejecutando una versión modificada de su convert
comando.
Ahora miramos a través de los resultados. Muchas de las fuentes no podían mostrar este glifo en particular, pero varias sí, lo que parece indicar que no es necesariamente un error en ImageMagick, sino una limitación de las fuentes mismas. Aquí hay una lista de las fuentes que tenía que podrían mostrar este glifo.
- DejaVu-Sans-Bold
- DejaVu-Sans-Bold-Oblique
- DejaVu-Sans-Book
- DejaVu-Sans-Condensed-Bold
- DejaVu-Sans-Condensed-Bold-Oblique
- DejaVu-Sans-Condensed
- DejaVu-Sans-Condensed-Oblique
- DejaVu-Sans-Mono-Bold
- DejaVu-Sans-Mono-Bold-Oblique
- DejaVu-Sans-Mono-Book
- DejaVu-Sans-Mono-Oblique
- DejaVu-Sans-Oblique
- DejaVu-Serif-Bold
- DejaVu-Serif-Bold-Italic
- DejaVu-Serif-Book
- DejaVu-Serif-Condensed-Bold
- DejaVu-Serif-Condensed-Bold-Italic
- DejaVu-Serif-Condensed
- DejaVu-Serif-Condensed-Italic
- DejaVu-Serif-Italic
- FreeMono-Regular
- FreeSerif-Regular
- STIX-Math-Regular
- STIX-Regular
- VL-Gótico-regular
Revisé visualmente los ~ 260 .gif
archivos resultantes para determinar cuál funcionó y cuál no. Aquí hay una muestra de algunos de los que funcionaron para que pueda verlos.
Referencias