mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-22 20:41:20 +00:00
6189142c60
It didn't really add anything of value as the glyph bitmap rects and the bearings were never used together, and the rest of the fields were entirely redundant. A small step towards using a component system for text.
113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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r_font.c
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Renderer font management management
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Copyright (C) 2022 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2022/8/26
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <math.h>
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#include "QF/quakefs.h"
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#include "QF/sys.h"
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#include "r_font.h"
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#include "r_text.h"
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#include "compat.h"
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rshaper_t *
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RText_NewShaper (rfont_t *font)
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{
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rshaper_t *shaper = malloc (sizeof (rshaper_t));
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shaper->rfont = font;
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shaper->font = hb_ft_font_create (font->face, 0);
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shaper->buffer = hb_buffer_create ();
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shaper->features = (r_hb_featureset_t) DARRAY_STATIC_INIT (4);
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hb_buffer_allocation_successful (shaper->buffer);
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return shaper;
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}
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void
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RText_DeleteShaper (rshaper_t *shaper)
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{
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hb_buffer_destroy (shaper->buffer);
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hb_font_destroy (shaper->font);
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DARRAY_CLEAR (&shaper->features);
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free (shaper);
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}
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void
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RText_AddFeature (rshaper_t *shaper, hb_feature_t feature)
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{
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DARRAY_APPEND (&shaper->features, feature);
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}
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void
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RText_ShapeText (rshaper_t *shaper, rtext_t *text)
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{
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hb_buffer_reset (shaper->buffer);
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hb_buffer_set_direction (shaper->buffer, text->direction);
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hb_buffer_set_script (shaper->buffer, text->script);
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const char *lang = text->language;
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hb_buffer_set_language (shaper->buffer,
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hb_language_from_string (lang, strlen (lang)));
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size_t length = strlen (text->text);
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hb_buffer_add_utf8 (shaper->buffer, text->text, length, 0, length);
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hb_shape (shaper->font, shaper->buffer,
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shaper->features.a, shaper->features.size);
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}
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void
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RText_RenderText (rshaper_t *shaper, rtext_t *text, int x, int y,
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rtext_render_t *render, void *data)
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{
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RText_ShapeText (shaper, text);
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unsigned count;
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__auto_type glyphInfo = hb_buffer_get_glyph_infos (shaper->buffer, &count);
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__auto_type glyphPos = hb_buffer_get_glyph_positions (shaper->buffer,
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&count);
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rfont_t *font = shaper->rfont;
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for (unsigned i = 0; i < count; i++) {
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vec2i_t bearing = font->glyph_bearings[glyphInfo[i].codepoint];
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int xp = x + glyphPos[i].x_offset / 64;
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int yp = y + glyphPos[i].y_offset / 64;
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int xa = glyphPos[i].x_advance / 64;
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int ya = glyphPos[i].y_advance / 64;
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xp += bearing[0];
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yp -= bearing[1];
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render (glyphInfo[i].codepoint, xp, yp, data);
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x += xa;
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y += ya;
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}
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}
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