- added libdrawtext

[demo_prior] / libs / drawtext / src / drawtext_impl.h

diff --git a/libs/drawtext/src/drawtext_impl.h b/libs/drawtext/src/drawtext_impl.h
new file mode 100644 (file)
index 0000000..31042e3
--- /dev/null
+++ b/libs/drawtext/src/drawtext_impl.h
@@ -0,0 +1,94 @@
+/*
+libdrawtext - a simple library for fast text rendering in OpenGL
+Copyright (C) 2011-2016  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef DRAWTEXT_IMPL_H_
+#define DRAWTEXT_IMPL_H_
+
+#include "drawtext.h"
+
+struct glyph {
+       int code;
+       float x, y, width, height;
+       /* normalized coords [0, 1] */
+       float nx, ny, nwidth, nheight;
+       float orig_x, orig_y;
+       float advance;
+       struct glyph *next;
+};
+
+struct dtx_glyphmap {
+       int ptsize;
+
+       int xsz, ysz;
+       unsigned int xsz_shift;
+       unsigned char *pixels;
+       unsigned int tex;
+       int tex_valid;
+       void *udata;
+
+       int cstart, cend;       /* character range */
+       int crange;
+
+       float line_advance;
+       float baseline;
+
+       struct glyph *glyphs;
+       struct dtx_glyphmap *next;
+};
+
+struct dtx_font {
+       /* freetype FT_Face */
+       void *face;
+
+       /* list of glyphmaps */
+       struct dtx_glyphmap *gmaps;
+
+       /* last returned glyphmap (cache) */
+       struct dtx_glyphmap *last_gmap;
+};
+
+#ifndef COMMON
+#define COMMON extern
+#endif
+
+COMMON struct dtx_font *dtx_font;
+COMMON int dtx_font_sz;
+COMMON int dtx_buf_mode;       /* DTX_NBF is 0 */
+COMMON float dtx_cur_color[4];
+COMMON int dtx_cur_color_int[4];
+COMMON float dtx_cur_offset[2];
+
+#define fperror(str) \
+       fprintf(stderr, "%s: %s: %s\n", __func__, (str), strerror(errno))
+
+#ifdef _MSC_VER
+#define __func__       __FUNCTION__
+#endif
+
+/* returns zero if it should NOT be printed and modifies xpos/ypos */
+/* implemented in font.c */
+struct dtx_glyphmap *dtx_proc_char(int code, float *xpos, float *ypos);
+
+COMMON const char *(*dtx_drawchar)(const char*, float*, float*, int*);
+COMMON void (*dtx_drawflush)(void);
+
+int dtx_gl_setopt(enum dtx_option opt, int val);
+int dtx_gl_getopt(enum dtx_option opt, int *ret);
+int dtx_rast_setopt(enum dtx_option opt, int val);
+int dtx_rast_getopt(enum dtx_option opt, int *ret);
+
+#endif /* DRAWTEXT_IMPL_H_ */