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122 lines
4.9 KiB
C
122 lines
4.9 KiB
C
/* zfont.h - handle fonts */
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/*
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libzint - the open source barcode library
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Copyright (C) 2026 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef Z_FONT_H
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#define Z_FONT_H
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#define ZFONT_MAX_CHARS ((int) sizeof(((struct zint_symbol *)0)->text))
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#define ZFONT_MAX_LINES ZFONT_MAX_CHARS
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/* NOTE: ZFONT_HALIGN_XXX be same as vector_string->halign */
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#define ZFONT_HALIGN_CENTRE 0
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#define ZFONT_HALIGN_LEFT 1
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#define ZFONT_HALIGN_RIGHT 2
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#define ZFONT_UPCEAN_TEXT 4 /* Helper flag to indicate dealing with EAN/UPC */
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#define ZFONT_UPCO_TEXT 8
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#define STBTT_STATIC
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#include "stb_truetype_zint.h"
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struct zfont_patch_info;
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struct zfont {
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stbtt_fontinfo info;
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/* Raster patching */
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const unsigned char *patch_info_idxs;
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const struct zfont_patch_info *patch_infos;
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const unsigned char *patches;
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const char *bases;
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int patch_info_idxs_size;
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const struct zfont_patch_info *upco_patch_infos;
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const unsigned char *upco_patches;
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int upceanflag;
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int grayscale;
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float scale; /* stb scale */
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float upco_scale; /* stb scale for UPC-E/A outside digits */
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int font_height;
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int upco_font_height; /* UPC-E/A outside digits font size */
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float ascent;
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float descent_adj;
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float line_gap;
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float text_height;
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/* Note using "ascender" to mean height above digits as "ascent" usually measured from baseline */
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float digit_ascender;
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float text_gap_antialias;
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float antialias_fudge;
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float hadvances[ZFONT_MAX_CHARS]; /* Horizontal advances */
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float line_widths[ZFONT_MAX_LINES];
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float max_line_width;
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unsigned char line_idxs[ZFONT_MAX_LINES + 1]; /* Line indices into `symbol->text`; last extra index is length */
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unsigned char iso_line_idxs[ZFONT_MAX_LINES + 1]; /* Line indices into `iso_text`; last extra index is length */
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int lines; /* Number of lines */
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int line_advance; /* Size (height) of each line */
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unsigned char iso_text[ZFONT_MAX_CHARS]; /* `symbol->text` converted to ISO/IEC 8859-1 */
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int iso_len; /* Length of `iso_text[]` */
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int glyphs[256]; /* Font glyphs (confined to ISO/IEC 8859-1, i.e. <= 0xFF) */
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unsigned char *bitmaps[256]; /* Rendered bitmaps per glyph */
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int bitmap_dims[256][4]; /* { width, height, `xMin`, `yMin` } */
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int space_glyph;
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int first_ch, last_ch; /* First/last bitmap character used */
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/* UPC-E/A outside stuff */
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int upco_glyphs[10]; /* Digits only */
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unsigned char *upco_bitmaps[10]; /* Rendered bitmaps per UPC-E/A outside glyph */
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int upco_bitmap_dims[10][4]; /* { width, height, `xMin`, `yMin` } */
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};
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/* Initialize a font */
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INTERNAL int zint_font_init(struct zfont *zfnt, struct zint_symbol *symbol, const int upceanflag);
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/* Free any resources */
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INTERNAL void zint_font_free(struct zfont *zfnt, const int si);
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/* Calculate various font metrics, and set total height of text in `zfnt->text_height` */
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INTERNAL int zint_font_text_height(struct zfont *zfnt, struct zint_symbol *symbol, const int si,
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const float max_width, const unsigned char addon[6], const int addon_len);
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/* Raster rendering */
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INTERNAL void zint_font_text_render(struct zfont *zfnt, struct zint_symbol *symbol, unsigned char *pixelbuf,
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const int line, const int main_width, const int xoffset, const int roffset, const int yposn,
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const int textflags, const int image_width, const int image_height, const int si);
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/* vim: set ts=4 sw=4 et : */
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#endif /* Z_FONT_H */
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