101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
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OpenLase - a realtime laser graphics toolkit
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Copyright (C) 2009-2011 Hector Martin "marcan" <hector@marcansoft.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 or version 3.
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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. See the
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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 the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <math.h>
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#include "libol.h"
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#include "text.h"
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extern Font default_font;
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Font *olGetDefaultFont(void)
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{
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return &default_font;
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}
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float olGetCharWidth(Font *font, char c)
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{
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if (!font)
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return 0;
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return font->chars[(uint8_t)c].width / font->height;
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}
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float olGetCharOverlap(Font *font, float height)
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{
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if (!font)
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return 0;
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float ratio = height / font->height;
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return font->overlap * ratio;
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}
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float olDrawChar(Font *font, float x, float y, float height, uint32_t color, char c)
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{
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if (!font)
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return 0;
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const FontChar *chr = &font->chars[(uint8_t)c];
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const FontPoint *p = chr->points;
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float ratio = height / font->height;
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if (p) {
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olBegin(OL_BEZIERSTRIP);
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do {
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olVertex3(x + p->x * ratio, y - p->y * ratio, 0, color);
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if (p->flag == 1) {
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olEnd();
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olBegin(OL_BEZIERSTRIP);
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}
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} while ((p++)->flag != 2);
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olEnd();
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}
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return chr->width * ratio;
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}
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float olDrawString(Font *font, float x, float y, float height, uint32_t color, const char *s)
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{
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float w = 0;
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float ratio = height / font->height;
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while(*s) {
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w += olDrawChar(font, x+w, y, height, color, *s) - font->overlap * ratio;
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s++;
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}
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return w + font->overlap * ratio;
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}
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float olGetStringWidth(Font *font, float height, const char *s)
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{
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float w = 0;
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float ratio = height / font->height;
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while(*s) {
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w += font->chars[(uint8_t)*s].width * ratio - font->overlap * ratio;
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s++;
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}
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return w + font->overlap * ratio;
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}
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