packages/services/gfx/mw/v2_0/src/demos/nanox/nxview.c

   1 /*
   2  * Copyright (c) 2000, 2001 Greg Haerr <greg@censoft.com>
   3  *
   4  * nxview - Nano-X image viewer
   5  *
   6  * Autorecognizes and displays BMP, GIF, JPEG, PNG and XPM files
   7  */
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #define MWINCLUDECOLORS
  12 #include "nano-X.h"
  13
  14 int
  15 main(int argc,char **argv)
  16 {
  17         GR_IMAGE_ID     image_id;
  18         GR_WINDOW_ID    window_id;
  19         GR_GC_ID        gc_id;
  20         GR_SIZE         w = -1;
  21         GR_SIZE         h = -1;
  22         GR_EVENT        event;
  23         GR_SCREEN_INFO  sinfo;
  24         GR_IMAGE_INFO   info;
  25         char            title[256];
  26
  27         if (argc < 2) {
  28                 printf("Usage: nxview <image file> [stretch]\n");
  29                 exit(1);
  30         }
  31
  32         if (GrOpen() < 0) {
  33                 fprintf(stderr, "cannot open graphics\n");
  34                 exit(1);
  35         }
  36
  37         if (!(image_id = GrLoadImageFromFile(argv[1], 0))) {
  38                 fprintf(stderr, "Can't load image file: %s\n", argv[1]);
  39                 exit(1);
  40         }
  41
  42         if(argc > 2) {
  43                 /* stretch to half screen size*/
  44                 GrGetScreenInfo(&sinfo);
  45                 w = sinfo.cols/2;
  46                 h = sinfo.rows/2;
  47         } else {
  48                 GrGetImageInfo(image_id, &info);
  49                 w = info.width;
  50                 h = info.height;
  51         }
  52
  53         sprintf(title, "nxview %s", argv[1]);
  54         window_id = GrNewWindowEx(GR_WM_PROPS_APPWINDOW, title,
  55                 GR_ROOT_WINDOW_ID, 0, 0, w, h, BLACK);
  56
  57         GrSelectEvents(window_id,
  58                 GR_EVENT_MASK_CLOSE_REQ|GR_EVENT_MASK_EXPOSURE);
  59
  60         GrMapWindow(window_id);
  61
  62         gc_id = GrNewGC();
  63
  64         while (1) {
  65                 GrGetNextEvent(&event);
  66                 switch(event.type) {
  67                 case GR_EVENT_TYPE_CLOSE_REQ:
  68                         GrDestroyWindow(window_id);
  69                         GrDestroyGC(gc_id);
  70                         GrFreeImage(image_id);
  71                         GrClose();
  72                         exit(0);
  73                         /* no return*/
  74                 case GR_EVENT_TYPE_EXPOSURE:
  75                         GrDrawImageToFit(window_id, gc_id, 0,0, w,h, image_id);
  76                         break;
  77                 }
  78         }
  79
  80         return 0;
  81 }