wrlib/view.c

   1 #include <X11/Xlib.h>
   2 #include "wraster.h"
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include "tile.xpm"
   6 Display *dpy;
   7 Window win;
   8 RContext *ctx;
   9 RImage *img;
  10 Pixmap pix;
  11
  12
  13
  14 int
  15 main(int argc, char **argv)
  16 {
  17     RContextAttributes attr;
  18
  19     dpy = XOpenDisplay("");
  20     if (!dpy) {
  21         puts("cant open display");
  22         exit(1);
  23     }
  24
  25     attr.flags = RC_RenderMode | RC_ColorsPerChannel;
  26     attr.render_mode = RDitheredRendering;
  27     attr.colors_per_channel = 4;
  28     ctx = RCreateContext(dpy, DefaultScreen(dpy), &attr);
  29
  30     if (argc<2)
  31         img = RGetImageFromXPMData(ctx, image_name);
  32     else
  33         img = RLoadImage(ctx, argv[1], 0);
  34
  35     if (!img) {
  36         puts(RMessageForError(RErrorCode));
  37         exit(1);
  38     }
  39     /*
  40     if (argc > 2) {
  41         RImage *tmp = img;
  42
  43         img = RSmoothScaleImage(tmp, tmp->width*atol(argv[2]),
  44                                 tmp->height*atol(argv[2]));
  45         RReleaseImage(tmp);
  46     }
  47      */
  48 #if 0
  49     if (argc > 2) {
  50         img = RScaleImage(img, img->width*atof(argv[2]),
  51                           img->height*atof(argv[2]));
  52     }
  53
  54     {
  55         RImage *tmp = RCreateImage(200, 200, True);
  56         RColor col = {0,0,255,255};
  57
  58         if (img->format == RRGBAFormat)
  59             puts("alpha");
  60         else
  61             puts("no alpha");
  62
  63         RClearImage(tmp, &col);
  64
  65         RCombineArea(tmp, img, 0, 0, 20, 20, 10, 10);
  66         img = tmp;
  67     }
  68 #endif
  69
  70     if (!RConvertImage(ctx, img, &pix)) {
  71         puts(RMessageForError(RErrorCode));
  72         exit(1);
  73     }
  74
  75     printf("%ix%i\n", img->width, img->height);
  76
  77
  78
  79     win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 10, 10,
  80                               img->width, img->height, 0, 0, 0);
  81     XSetWindowBackgroundPixmap(dpy, win, pix);
  82     XClearWindow(dpy, win);
  83     XMapRaised(dpy, win);
  84     XFlush(dpy);
  85     getchar();
  86
  87     return 0;
  88 }