我尝试使用bmp文件在x11窗口中设置背景图像。我使用XReadBitmapFile但它无法正常工作。我如何使用bmp文件来设置x11窗口背景。提前致谢
答案 0 :(得分:2)
XReadBitmapFile仅用于读取.xbm文件。我们需要的是一个用于读取BMP文件的库,一种可能性是ImLib2,它可以读取多种类型的文件,并且可以很好地与Xlib一起使用。
以下是使用它的一个长期例子:
/* displays an image or sets root background
* PUBLIC DOMAIN - CC0 http://creativecommons.org/publicdomain/zero/1.0/
* J.Mayo 2013
*
* gcc -Wall -W -g3 -o xrootbg xrootbg.c -lX11 -lImlib2
*
*/
#include <stdio.h>
#include <X11/Xlib.h>
#include <Imlib2.h>
int main(int argc, char **argv)
{
Imlib_Image img;
Display *dpy;
Pixmap pix;
Window root;
Screen *scn;
int width, height;
const char *filename = NULL;
if (argc < 2)
goto usage;
filename = argv[1];
img = imlib_load_image(filename);
if (!img) {
fprintf(stderr, "%s:Unable to load image\n", filename);
goto usage;
}
imlib_context_set_image(img);
width = imlib_image_get_width();
height = imlib_image_get_height();
dpy = XOpenDisplay(NULL);
if (!dpy)
return 0;
scn = DefaultScreenOfDisplay(dpy);
root = DefaultRootWindow(dpy);
pix = XCreatePixmap(dpy, root, width, height,
DefaultDepthOfScreen(scn));
imlib_context_set_display(dpy);
imlib_context_set_visual(DefaultVisualOfScreen(scn));
imlib_context_set_colormap(DefaultColormapOfScreen(scn));
imlib_context_set_drawable(pix);
imlib_render_image_on_drawable(0, 0);
XSetWindowBackgroundPixmap(dpy, root, pix);
XClearWindow(dpy, root);
while (XPending(dpy)) {
XEvent ev;
XNextEvent(dpy, &ev);
}
XFreePixmap(dpy, pix);
imlib_free_image();
XCloseDisplay(dpy);
return 0;
usage:
fprintf(stderr, "usage: %s <image_file>\n", argv[0]);
return 1;
}