demos/ttf2img/ttf2img.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2012 Cyril Hrubis <metan@ucw.cz>                       *
  20  *                                                                           *
  21  *****************************************************************************/
  22
  23  /*
  24
  25    Uses gfxprim to render small image with defined string.
  26
  27   */
  28
  29 #include <GP.h>
  30
  31 static const char help[] = {
  32         "usage: ttf2img -f font.ttf -i file.png -s string [-d debug_level]\n",
  33 };
  34
  35 static void print_help(int i)
  36 {
  37         fputs(help, stderr);
  38         exit(i);
  39 }
  40
  41 int main(int argc, char *argv[])
  42 {
  43         const char *font_path = NULL;
  44         const char *img_path = NULL;
  45         const char *string   = "Foo Bar!";
  46         int opt, debug_level = 0;
  47         int img_w = 400, img_h = 100;
  48
  49         while ((opt = getopt(argc, argv, "d:f:i:s:")) != -1) {
  50                 switch (opt) {
  51                 case 'f':
  52                         font_path = optarg;
  53                 break;
  54                 case 'i':
  55                         img_path = optarg;
  56                 break;
  57                 case 'd':
  58                         debug_level = atoi(optarg);
  59                 break;
  60                 case 'h':
  61                         print_help(0);
  62                 break;
  63                 case 's':
  64                         string = optarg;
  65                 break;
  66                 default:
  67                         fprintf(stderr, "Invalid paramter '%c'\n", opt);
  68                         print_help(1);
  69                 }
  70         }
  71
  72         if (font_path == NULL || img_path == NULL)
  73                 print_help(1);
  74
  75         GP_SetDebugLevel(debug_level);
  76
  77         GP_Context *context = GP_ContextAlloc(img_w, img_h, GP_PIXEL_RGB888);
  78
  79         GP_Pixel black_pixel = GP_RGBToContextPixel(0x00, 0x00, 0x00, context);
  80         GP_Pixel white_pixel = GP_RGBToContextPixel(0xff, 0xff, 0xff, context);
  81
  82         GP_Fill(context, white_pixel);
  83
  84         GP_TextStyle style = GP_DEFAULT_TEXT_STYLE;
  85
  86         style.font = GP_FontFaceLoad(font_path, 27, 0);
  87
  88         GP_Text(context, &style, img_w/2, img_h/2, GP_ALIGN_CENTER|GP_VALIGN_CENTER,
  89                 black_pixel, white_pixel, string);
  90
  91         GP_SavePNG(context, img_path, NULL);
  92
  93         GP_ContextFree(context);
  94
  95         return 0;
  96 }