wrlib/tests/testrot.c

   1
   2 #include <X11/Xlib.h>
   3 #include "wraster.h"
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7 #include "tile.xpm"
   8 Display *dpy;
   9 Window win;
  10 RContext *ctx;
  11 RImage *img;
  12 Pixmap pix;
  13
  14 #define MAX(a,b) (a)>(b) ? (a) : (b)
  15
  16 int main(int argc, char **argv)
  17 {
  18         RContextAttributes attr;
  19         float a;
  20
  21         dpy = XOpenDisplay("");
  22         if (!dpy) {
  23                 puts("cant open display");
  24                 exit(1);
  25         }
  26
  27         attr.flags = RC_RenderMode | RC_ColorsPerChannel;
  28         attr.render_mode = RDitheredRendering;
  29         attr.colors_per_channel = 4;
  30         ctx = RCreateContext(dpy, DefaultScreen(dpy), &attr);
  31
  32         if (argc < 2)
  33                 img = RGetImageFromXPMData(ctx, image_name);
  34         else
  35                 img = RLoadImage(ctx, argv[1], 0);
  36
  37         if (!img) {
  38                 puts(RMessageForError(RErrorCode));
  39                 exit(1);
  40         }
  41         win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 10, 10,
  42                                   MAX(img->width, img->height), MAX(img->height, img->width), 0, 0, 0);
  43         XMapRaised(dpy, win);
  44         XFlush(dpy);
  45
  46         a = 0;
  47         while (1) {
  48                 RImage *tmp;
  49
  50                 a = a + 1.0;
  51
  52                 tmp = RRotateImage(img, a);
  53                 if (!RConvertImage(ctx, tmp, &pix)) {
  54                         puts(RMessageForError(RErrorCode));
  55                         exit(1);
  56                 }
  57                 RReleaseImage(tmp);
  58
  59                 XSetWindowBackgroundPixmap(dpy, win, pix);
  60                 XFreePixmap(dpy, pix);
  61                 XClearWindow(dpy, win);
  62                 XSync(dpy, 0);
  63                 usleep(50000);
  64         }
  65         exit(0);
  66 }