nuclear@24: /*
nuclear@24: libdrawtext - a simple library for fast text rendering in OpenGL
nuclear@29: Copyright (C) 2011-2012  John Tsiombikas <nuclear@member.fsf.org>
nuclear@24: 
nuclear@24: This program is free software: you can redistribute it and/or modify
nuclear@24: it under the terms of the GNU Lesser General Public License as published by
nuclear@24: the Free Software Foundation, either version 3 of the License, or
nuclear@24: (at your option) any later version.
nuclear@24: 
nuclear@24: This program is distributed in the hope that it will be useful,
nuclear@24: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@24: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@24: GNU Lesser General Public License for more details.
nuclear@24: 
nuclear@24: You should have received a copy of the GNU Lesser General Public License
nuclear@24: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@24: */
nuclear@24: #ifndef TEXT_IMPL_H_
nuclear@24: #define TEXT_IMPL_H_
nuclear@24: 
nuclear@66: #include <stdio.h>
nuclear@66: #include <string.h>
nuclear@66: #include <errno.h>
nuclear@66: 
nuclear@24: struct glyph {
nuclear@24: 	int code;
nuclear@24: 	float x, y, width, height;
nuclear@24: 	/* normalized coords [0, 1] */
nuclear@24: 	float nx, ny, nwidth, nheight;
nuclear@24: 	float orig_x, orig_y;
nuclear@24: 	float advance;
nuclear@24: 	struct glyph *next;
nuclear@24: };
nuclear@24: 
nuclear@24: struct dtx_glyphmap {
nuclear@24: 	int ptsize;
nuclear@24: 
nuclear@24: 	int xsz, ysz;
nuclear@24: 	unsigned char *pixels;
nuclear@24: 	unsigned int tex;
nuclear@24: 
nuclear@24: 	int cstart, cend;	/* character range */
nuclear@24: 	int crange;
nuclear@24: 
nuclear@24: 	float line_advance;
nuclear@24: 
nuclear@24: 	struct glyph *glyphs;
nuclear@24: 	struct dtx_glyphmap *next;
nuclear@24: };
nuclear@24: 
nuclear@24: struct dtx_font {
nuclear@24: 	/* freetype FT_Face */
nuclear@24: 	void *face;
nuclear@24: 
nuclear@24: 	/* list of glyphmaps */
nuclear@24: 	struct dtx_glyphmap *gmaps;
nuclear@24: 
nuclear@24: 	/* last returned glyphmap (cache) */
nuclear@24: 	struct dtx_glyphmap *last_gmap;
nuclear@24: };
nuclear@24: 
nuclear@24: 
nuclear@24: struct dtx_font *dtx_font;
nuclear@24: int dtx_font_sz;
nuclear@24: 
nuclear@24: 
nuclear@24: #define fperror(str) \
nuclear@66: 	fprintf(stderr, "%s: %s: %s\n", __FUNCTION__, (str), strerror(errno))
nuclear@24: 
nuclear@24: int dtx_gl_init(void);
nuclear@24: 
nuclear@24: /* returns zero if it should NOT be printed and modifies xpos/ypos */
nuclear@24: /* implemented in font.c */
nuclear@24: struct dtx_glyphmap *dtx_proc_char(int code, float *xpos, float *ypos);
nuclear@24: 
nuclear@24: #endif	/* TEXT_IMPL_H_ */