使用xlib输出8000张图片

Question

该计划的整个目标是将8000张图片输出到屏幕上。这就是我在这方面取得的成就。

如果你可以帮我把图片而不是空白空间我应该很好，因为我不太熟悉xlib。

我想稍后更改屏幕上的图片。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

void draw(char *rgb_out, int w, int h)
{
for(int i=0; i<w*h*4; i++)
*rgb_out++ = rand();
}

XImage *create_ximage(Display *display, Visual *visual, int width, int height)
{
char *image32 = (char *)malloc(width * height * 4);
draw(image32, width, height);
return XCreateImage(display, visual, 24, ZPixmap, 0, image32, width, height, 32, 0);
}

int x11_err_handler(Display *pd, XErrorEvent *pxev)
{
char msg[4096] = { 0 };
XGetErrorText(pd, pxev -> error_code, msg, sizeof(msg));
printf("%s\n", msg);
return 0;
}

draw_graphics(Window win, GC gc, int window_width, int window_height)

{
int x, y;
unsigned int width, height;
height = window_height/2;
width = 3 * window_width/4;
x = window_width/2 - width/2;  /* Center */
y = window_height/2 - height/2;
XDrawRectangle(display, win, gc, x, y, width, height);
}

int main (int argc, char *argv[])
{
Display                 *display;
    Visual                  *visual;
    int                     depth;
    XSetWindowAttributes    frame_attributes;
    Window                  frame_window;
    XFontStruct             *fontinfo;
    XGCValues               gr_values;
    GC                      graphical_context;
    XKeyEvent               event;
    char                    hello_string[] = "Hello World";
    int                     hello_string_length = strlen(hello_string);
    int                     i = 0;
    int                     t = 0;
    int                     x = 15;
    int                     y = 15;


    display = XOpenDisplay(NULL);
    visual = DefaultVisual(display, 0);
    depth  = DefaultDepth(display, 0);

    frame_attributes.background_pixel = XWhitePixel(display, 0);
    /* create the application window */
    frame_window = XCreateWindow(display, XRootWindow(display, 0),
                                 0, 0, 1200, 1200, 5, depth,
                                 InputOutput, visual, CWBackPixel,
                                 &frame_attributes);
    XStoreName(display, frame_window, "Hello World Example");
    XSelectInput(display, frame_window, ExposureMask | StructureNotifyMask);

    fontinfo = XLoadQueryFont(display, "10x20");
    gr_values.font = fontinfo->fid;
    gr_values.foreground = XBlackPixel(display, 0);
    gr_values.background = XWhitePixel(display, 0);
    graphical_context = XCreateGC(display, frame_window,
                                  GCFont+GCForeground+GCBackground, &gr_values);
    XMapWindow(display, frame_window);

    while ( 1 ) {
        XNextEvent(display, (XEvent *)&event);
        switch ( event.type ) {
            case Expose:
            {
         while (i < 64){
           i = 0;
                while(i < 125)
        {

                XImage *ximage = create_ximage(display, visual, 125, 125);
                XPutImage(display, frame_window, graphical_context, ximage, 0, 0, x, y, 9, 9);

        XDestroyImage(ximage);

                XFlush(display);
                ++i;
        x = x + 9;                
        }
        y = y + 9;
    x = 9;

    ++t;
    i = t;
        }                   
        usleep(2);
            }
          default:
              break;
       }
    }    
 return(0);

}