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https://git.code.sf.net/p/quake/quakeforge
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95f55dfc34
And add a function to process a passage into a set of views with glyphs. The views can be flowed: they have flow gravity and their sizes set to contain all the glyphs within each view (nominally, words). Nothing is tested yet, and font rendering is currently broken completely.
115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
/*
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text.h
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Text 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: 2022/9/4
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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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#ifndef __QF_ui_text_h
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#define __QF_ui_text_h
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#include <hb.h>
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#include <hb-ft.h>
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#include "QF/darray.h"
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#include "QF/ecs/component.h"
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typedef struct script_component_s {
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hb_language_t language;
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hb_script_t script;
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hb_direction_t direction;
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} script_component_t;
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typedef struct glyphobj_s {
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int glyphid;
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int x, y;
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int fontid;
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} glyphobj_t;
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typedef struct glyphref_s {
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uint32_t start;
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uint32_t count;
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} glyphref_t;
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typedef struct glyphset_s {
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glyphobj_t *glyphs;
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uint32_t count;
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} glyphset_t;
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typedef struct text_s {
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const char *text;
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const char *language;
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hb_script_t script;
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hb_direction_t direction;
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} text_t;
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enum {
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// covers both view and passage text object hierarcies
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text_href,
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// all the glyhphs in a passage
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text_passage,
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text_glyphs,
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text_script,
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text_font,
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text_features,
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text_type_count
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};
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typedef struct featureset_s DARRAY_TYPE (hb_feature_t) featureset_t;
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struct font_s;
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struct rglyph_s;
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typedef void text_render_t (uint32_t glyphid, int x, int y, void *data);
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typedef struct shaper_s {
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struct font_s *rfont;
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hb_font_t *font;
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hb_buffer_t *buffer;
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featureset_t features;
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} shaper_t;
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extern hb_feature_t LigatureOff;
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extern hb_feature_t LigatureOn;
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extern hb_feature_t KerningOff;
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extern hb_feature_t KerningOn;
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extern hb_feature_t CligOff;
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extern hb_feature_t CligOn;
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struct font_s;
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struct passage_s;
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shaper_t *Text_NewShaper (struct font_s *font);
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void Text_DeleteShaper (shaper_t *shaper);
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void Text_AddFeature (shaper_t *shaper, hb_feature_t feature);
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void Text_ShapeText (shaper_t *shaper, text_t *text);
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void Text_RenderText (shaper_t *shaper, text_t *text, int x, int y,
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text_render_t *render, void *data);
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void Text_Init (void);
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struct view_s Text_View (struct font_s *font, struct passage_s *passage);
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#endif//__QF_ui_text_h
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