mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 06:34:11 +00:00
935e883d8d
This means that QF should support more exotic fonts without any issue (once the rest of the text handling system is up to snuff) as HarfBuzz does all the hard work of handling OpenType, Graphite, etc text shaping, including kerning (when enabled). Also, font loading now loads all the glyphs into the atlas (preload is gone).
130 lines
3.3 KiB
C
130 lines
3.3 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 "QF/math/bitop.h"
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#include "r_font.h"
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#include "compat.h"
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static FT_Library ft;
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static void
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copy_glyph (rglyph_t *glyph, FT_GlyphSlot src_glyph)
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{
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int dst_pitch = glyph->font->scrap.width;
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byte *dst = glyph->font->scrap_bitmap + glyph->rect->x + glyph->rect->y * dst_pitch;
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int src_pitch = src_glyph->bitmap.pitch;
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byte *src = src_glyph->bitmap.buffer;
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for (unsigned i = 0; i < src_glyph->bitmap.rows; i++) {
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memcpy (dst, src, src_glyph->bitmap.width);
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dst += dst_pitch;
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src += src_pitch;
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}
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}
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VISIBLE void
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R_FontInit (void)
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{
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if (FT_Init_FreeType (&ft)) {
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Sys_Error ("Could not init FreeType library");
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}
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}
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VISIBLE void
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R_FontFree (rfont_t *font)
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{
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if (font->face) {
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FT_Done_Face (font->face);
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}
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if (font->scrap.rects || font->scrap.free_rects) {
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R_ScrapDelete (&font->scrap);
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}
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free (font->glyphs);
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free (font->scrap_bitmap);
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free (font->font_resource);
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free (font);
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}
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VISIBLE rfont_t *
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R_FontLoad (QFile *font_file, int size)
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{
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byte *font_data = QFS_LoadFile (font_file, 0);
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if (!font_data) {
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return 0;
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}
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size_t font_size = Qfilesize (font_file);;
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rfont_t *font = calloc (1, sizeof (rfont_t));
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font->font_resource = font_data;
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if (FT_New_Memory_Face (ft, font_data, font_size, 0, &font->face)) {
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R_FontFree (font);
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return 0;
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}
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FT_Set_Pixel_Sizes(font->face, 0, size);
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int pixels = 0;
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for (FT_Long gind = 0; gind < font->face->num_glyphs; gind++) {
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FT_Load_Glyph (font->face, gind, FT_LOAD_DEFAULT);
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__auto_type g = font->face->glyph;
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pixels += g->bitmap.width * g->bitmap.rows;
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}
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pixels = sqrt (2 * pixels);
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pixels = BITOP_RUP (pixels);
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R_ScrapInit (&font->scrap, pixels, pixels);
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font->scrap_bitmap = calloc (1, pixels * pixels);
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font->num_glyphs = font->face->num_glyphs;
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font->glyphs = malloc (font->num_glyphs * sizeof (rglyph_t));
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for (FT_Long gind = 0; gind < font->face->num_glyphs; gind++) {
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rglyph_t *glyph = &font->glyphs[gind];
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FT_Load_Glyph (font->face, gind, FT_LOAD_DEFAULT);
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__auto_type slot = font->face->glyph;
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FT_Render_Glyph (slot, FT_RENDER_MODE_NORMAL);
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int width = slot->bitmap.width;
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int height = slot->bitmap.rows;
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glyph->font = font;
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glyph->rect = R_ScrapAlloc (&font->scrap, width, height);
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glyph->bearing = (vec2i_t) { slot->bitmap_left, slot->bitmap_top };
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glyph->advance = slot->advance.x;
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glyph->charcode = gind;
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copy_glyph (glyph, slot);
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}
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return font;
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}
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