libs/SDL/GP_SDL_VideoInit.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) 2009-2010 Jiri "BlueBear" Dluhos                            *
  20  *                         <jiri.bluebear.dluhos@gmail.com>                  *
  21  *                                                                           *
  22  * Copyright (C) 2009-2010 Cyril Hrubis <metan@ucw.cz>                       *
  23  *                                                                           *
  24  *****************************************************************************/
  25
  26 #include "GP.h"
  27 #include "GP_SDL.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 GP_RetCode GP_SDL_VideoInit(GP_Context *context, int width, int height,
  33         int argc, char **argv)
  34 {
  35         if (context == NULL) {
  36                 return GP_ENULLPTR;
  37         }
  38
  39         /* switches that can be set on the command line */
  40         int display_bpp = 0;
  41         int debug = 0;
  42
  43         if (argc > 0) {
  44
  45                 if (argv == NULL) {
  46                         return GP_ENULLPTR;
  47                 }
  48
  49                 /* extract settings from the command line */
  50                 int i;
  51                 for (i = 1; i < argc; i++) {
  52                         if (strcmp(argv[i], "--8bpp") == 0) {
  53                                 display_bpp = 8;
  54                         }
  55                         else if (strcmp(argv[i], "--16bpp") == 0) {
  56                                 display_bpp = 16;
  57                         }
  58                         else if (strcmp(argv[i], "--24bpp") == 0) {
  59                                 display_bpp = 24;
  60                         }
  61                         else if (strcmp(argv[i], "--32bpp") == 0) {
  62                                 display_bpp = 32;
  63                         }
  64                         else if (strcmp(argv[i], "--debug") == 0) {
  65                                 debug = 1;
  66                         }
  67                 }
  68         }
  69
  70         if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
  71                 if (debug) {
  72                         fprintf(stderr, "Error: Could not initialize SDL: %s\n",
  73                                 SDL_GetError());
  74                 }
  75                 return GP_EBACKENDLOST;
  76         }
  77
  78         SDL_Surface *display = NULL;
  79         display = SDL_SetVideoMode(width, height, display_bpp, SDL_SWSURFACE);
  80         if (display == NULL) {
  81                 if (debug) {
  82                         fprintf(stderr, "Error: Unable to set video mode: %s\n",
  83                                 SDL_GetError());
  84                 }
  85                 SDL_Quit();
  86                 return GP_EINVAL;
  87         }
  88
  89         if (debug) {
  90                 printf("Display properties:\n");
  91                 printf("    width: %4d, height: %4d, pitch: %4d\n",
  92                         display->w, display->h, display->pitch);
  93                 printf("    bits per pixel: %2d, bytes per pixel: %2d\n",
  94                         display->format->BitsPerPixel, display->format->BytesPerPixel);
  95                 printf("    pixel bit masks: R=%x, G=%x, B=%x, A=%x\n",
  96                         display->format->Rmask, display->format->Gmask,
  97                         display->format->Bmask, display->format->Amask);
  98         }
  99
 100         GP_RetCode retcode;
 101         retcode = GP_SDL_ContextFromSurface(context, display);
 102         if (retcode != GP_ESUCCESS) {
 103                 if (debug) {
 104                         fprintf(stderr, "Error: Could not create context: %s\n",
 105                                 GP_RetCodeName(retcode));
 106                 }
 107                 SDL_Quit();
 108                 return retcode;
 109         }
 110
 111         return GP_ESUCCESS;
 112 }