- added libdrawtext

[demo_prior] / libs / drawtext / src / draw.c

diff --git a/libs/drawtext/src/draw.c b/libs/drawtext/src/draw.c
new file mode 100644 (file)
index 0000000..a35b4d4
--- /dev/null
+++ b/libs/drawtext/src/draw.c
@@ -0,0 +1,108 @@
+/*
+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/>.
+*/
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#if defined(WIN32) || defined(__WIN32__)
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
+#include "drawtext.h"
+#include "drawtext_impl.h"
+
+void dtx_position(float x, float y)
+{
+       dtx_cur_offset[0] = x;
+       dtx_cur_offset[1] = y;
+}
+
+void dtx_color(float r, float g, float b, float a)
+{
+       dtx_cur_color[0] = r;
+       dtx_cur_color[1] = g;
+       dtx_cur_color[2] = b;
+       dtx_cur_color[3] = a;
+
+       dtx_cur_color_int[0] = r > 1.0 ? 255 : (int)(r * 255.0);
+       dtx_cur_color_int[1] = g > 1.0 ? 255 : (int)(g * 255.0);
+       dtx_cur_color_int[2] = b > 1.0 ? 255 : (int)(b * 255.0);
+       dtx_cur_color_int[3] = a > 1.0 ? 255 : (int)(a * 255.0);
+}
+
+void dtx_string(const char *str)
+{
+       dtx_substring(str, 0, strlen(str));
+}
+
+void dtx_substring(const char *str, int start, int end)
+{
+       int should_flush = dtx_buf_mode == DTX_NBF;
+       float pos_x = dtx_cur_offset[0];
+       float pos_y = dtx_cur_offset[1];
+
+       if(!dtx_font) {
+               return;
+       }
+
+       /* skip start characters */
+       while(*str && start > 0) {
+               str = dtx_utf8_next_char((char*)str);
+               --start;
+               --end;
+       }
+
+       while(*str && --end >= 0) {
+               str = dtx_drawchar(str, &pos_x, &pos_y, &should_flush);
+       }
+
+       if(should_flush) {
+               dtx_drawflush();
+       }
+}
+
+void dtx_printf(const char *fmt, ...)
+{
+       va_list ap;
+       int buf_size;
+       char *buf, tmp;
+
+       if(!dtx_font) {
+               return;
+       }
+
+       va_start(ap, fmt);
+       buf_size = vsnprintf(&tmp, 0, fmt, ap);
+       va_end(ap);
+
+       if(buf_size == -1) {
+               buf_size = 512;
+       }
+
+       buf = alloca(buf_size + 1);
+       va_start(ap, fmt);
+       vsnprintf(buf, buf_size + 1, fmt, ap);
+       va_end(ap);
+
+       dtx_string(buf);
+}
+
+void dtx_flush(void)
+{
+       dtx_drawflush();
+}