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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
commit | 3c57dd931145d43f2b0aef96c4d178135956bf91 (patch) | |
tree | 3de698981e9f0cc2c4f9569b19a5f3595e741f6b /app/text/gimptext-xlfd.c | |
parent | Initial commit. (diff) | |
download | gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.tar.xz gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.zip |
Adding upstream version 2.10.36.upstream/2.10.36
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/text/gimptext-xlfd.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/app/text/gimptext-xlfd.c b/app/text/gimptext-xlfd.c new file mode 100644 index 0000000..16245b5 --- /dev/null +++ b/app/text/gimptext-xlfd.c @@ -0,0 +1,301 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * GimpText + * Copyright (C) 2002-2004 Sven Neumann <sven@gimp.org> + * + * Some of this code was copied from Pango (pangox-fontmap.c) + * and was originally written by Owen Taylor <otaylor@redhat.com>. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <stdlib.h> +#include <string.h> + +#include <gio/gio.h> + +#include "libgimpbase/gimpbase.h" + +#include "text-types.h" + +#include "gimptext.h" +#include "gimptext-xlfd.h" + + +#define XLFD_MAX_FIELD_LEN 64 + +/* These are the field numbers in the X Logical Font Description fontnames, + e.g. -adobe-courier-bold-o-normal--25-180-100-100-m-150-iso8859-1 */ +enum +{ + XLFD_FOUNDRY = 0, + XLFD_FAMILY = 1, + XLFD_WEIGHT = 2, + XLFD_SLANT = 3, + XLFD_SET_WIDTH = 4, + XLFD_ADD_STYLE = 5, + XLFD_PIXELS = 6, + XLFD_POINTS = 7, + XLFD_RESOLUTION_X = 8, + XLFD_RESOLUTION_Y = 9, + XLFD_SPACING = 10, + XLFD_AVERAGE_WIDTH = 11, + XLFD_CHARSET = 12, + XLFD_NUM_FIELDS +}; + +static gchar * gimp_text_get_xlfd_field (const gchar *fontname, + gint field_num, + gchar *buffer); +static gchar * launder_font_name (gchar *name); + + +/** + * gimp_text_font_name_from_xlfd: + * @xlfd: X Logical Font Description + * + * Attempts to extract a meaningful font name from the "family", + * "weight", "slant" and "stretch" fields of an X Logical Font + * Description. + * + * Return value: a newly allocated string. + **/ +gchar * +gimp_text_font_name_from_xlfd (const gchar *xlfd) +{ + gchar *fields[4]; + gchar buffers[4][XLFD_MAX_FIELD_LEN]; + gint i = 0; + + /* family */ + fields[i] = gimp_text_get_xlfd_field (xlfd, XLFD_FAMILY, buffers[i]); + if (fields[i]) + i++; + + /* weight */ + fields[i] = gimp_text_get_xlfd_field (xlfd, XLFD_WEIGHT, buffers[i]); + if (fields[i] && strcmp (fields[i], "medium")) + i++; + + /* slant */ + fields[i] = gimp_text_get_xlfd_field (xlfd, XLFD_SLANT, buffers[i]); + if (fields[i]) + { + switch (*fields[i]) + { + case 'i': + strcpy (buffers[i], "italic"); + i++; + break; + case 'o': + strcpy (buffers[i], "oblique"); + i++; + break; + case 'r': + break; + } + } + + /* stretch */ + fields[i] = gimp_text_get_xlfd_field (xlfd, XLFD_SET_WIDTH, buffers[i]); + if (fields[i] && strcmp (fields[i], "normal")) + i++; + + if (i < 4) + fields[i] = NULL; + + return launder_font_name (g_strconcat (fields[0], " ", + fields[1], " ", + fields[2], " ", + fields[3], NULL)); +} + +/** + * gimp_text_font_size_from_xlfd: + * @xlfd: X Logical Font Description + * @size: return location for the font size + * @size_unit: return location for the font size unit + * + * Attempts to extract the font size from an X Logical Font + * Description. + * + * Return value: %TRUE on success, %FALSE otherwise. + **/ +gboolean +gimp_text_font_size_from_xlfd (const gchar *xlfd, + gdouble *size, + GimpUnit *size_unit) +{ + gchar buffer[XLFD_MAX_FIELD_LEN]; + gchar *field; + + if (!xlfd) + return FALSE; + + field = gimp_text_get_xlfd_field (xlfd, XLFD_PIXELS, buffer); + if (field) + { + *size = atoi (field); + *size_unit = GIMP_UNIT_PIXEL; + return TRUE; + } + + field = gimp_text_get_xlfd_field (xlfd, XLFD_POINTS, buffer); + if (field) + { + *size = atoi (field) / 10.0; + *size_unit = GIMP_UNIT_POINT; + return TRUE; + } + + return FALSE; +} + +/** + * gimp_text_set_font_from_xlfd: + * @text: a #GimpText object + * @xlfd: X Logical Font Description + * + * Attempts to extract font name and font size from @xlfd and sets + * them on the #GimpText object. + **/ +void +gimp_text_set_font_from_xlfd (GimpText *text, + const gchar *xlfd) +{ + gchar *font; + gdouble size; + GimpUnit size_unit; + + g_return_if_fail (GIMP_IS_TEXT (text)); + + if (!xlfd) + return; + + font = gimp_text_font_name_from_xlfd (xlfd); + +#if GIMP_TEXT_DEBUG + g_printerr ("XLFD: %s font: %s\n", xlfd, font ? font : "(null)"); +#endif + + if (gimp_text_font_size_from_xlfd (xlfd, &size, &size_unit)) + { + g_object_set (text, + "font-size", size, + "font-size-unit", size_unit, + font ? "font" : NULL, font, + NULL); + } + else if (font) + { + g_object_set (text, + "font", font, + NULL); + } + + g_free (font); +} + +/** + * gimp_text_get_xlfd_field: + * @fontname: an XLFD fontname + * @field_num: field index + * @buffer: buffer of at least XLFD_MAX_FIELD_LEN chars + * + * Fills the buffer with the specified field from the X Logical Font + * Description name, and returns it. Note: For the charset field, we + * also return the encoding, e.g. 'iso8859-1'. + * + * This function is basically copied from pangox-fontmap.c. + * + * Returns: a pointer to the filled buffer or %NULL if fontname is + * %NULL, the field is longer than XFLD_MAX_FIELD_LEN or it contains + * just an asterisk. + **/ +static gchar * +gimp_text_get_xlfd_field (const gchar *fontname, + gint field_num, + gchar *buffer) +{ + const gchar *t1, *t2; + gchar *p; + gint countdown, num_dashes; + gsize len; + + if (!fontname) + return NULL; + + /* we assume this is a valid fontname...that is, it has 14 fields */ + + for (t1 = fontname, countdown = field_num; *t1 && (countdown >= 0); t1++) + if (*t1 == '-') + countdown--; + + num_dashes = (field_num == XLFD_CHARSET) ? 2 : 1; + + for (t2 = t1; *t2; t2++) + { + if (*t2 == '-' && --num_dashes == 0) + break; + } + + if (t2 > t1) + { + /* Check we don't overflow the buffer */ + len = (gsize) t2 - (gsize) t1; + if (len > XLFD_MAX_FIELD_LEN - 1) + return NULL; + + if (*t1 == '*') + return NULL; + + strncpy (buffer, t1, len); + buffer[len] = 0; + + /* Convert to lower case. */ + for (p = buffer; *p; p++) + *p = g_ascii_tolower (*p); + } + else + { + return NULL; + } + + return buffer; +} + +/* Guard against font names that end in numbers being interpreted as a + * font size in pango font descriptions + */ +static gchar * +launder_font_name (gchar *name) +{ + gchar *laundered_name; + gchar last_char; + + last_char = name[strlen (name) - 1]; + + if (g_ascii_isdigit (last_char) || last_char == '.') + { + laundered_name = g_strconcat (name, ",", NULL); + g_free (name); + + return laundered_name; + } + else + return name; +} |