如何格式化 XCreateImage 数据变量？

Question

下面是XCreateImage函数。我可以让它与我的程序一起工作，但图像打印不正确。应该如何格式化此函数中的数据变量以打印出良好的图像。比如它应该是 r g b r g b r g b 还是有一个标题或这个函数工作所需的任何东西？我想我会发布我的整个来源，但您仍然需要图像文件来理解我所看到的，它打印出图像但并不完美。所以很好奇如何格式化数据变量以打印出好的图像。

extern XImage *XCreateImage(
    Display*        /* display */,
    Visual*     /* visual */,
    unsigned int    /* depth */,
    int         /* format */,
    int         /* offset */,
    char*       /* data */,
    unsigned int    /* width */,
    unsigned int    /* height */,
    int         /* bitmap_pad */,
    int         /* bytes_per_line */
);

#include <arpa/inet.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <time.h>
#include <unistd.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <X11/Xutil.h>

Display *d; /* Display */
int s;      /* Screen  */

/* Windows */
Window w;
Window ngb;
Window lgb;

Visual *v;

int looping = 1;

XEvent e;

struct timeval tv;

unsigned char *AOI = 0;

unsigned char *load_bmp_image(const char *loc) {
    unsigned char *image=0;
    unsigned char *tmp=0;
    FILE *fp;
    char buffer[288];
    int i=0,c=0,br=0;
    size_t si=0;

    fp=fopen(loc, "r");
    if(fp==NULL) {
        snprintf(buffer, 287, "Unable to open %s for reading!", loc);
        buffer[287] = 0;
        perror(buffer);
        return 0;
    }
    while(!feof(fp)){ fgetc(fp); br++; }

    si=br-138;

    image=malloc(si);
    if(image==0) {
        fclose(fp);
        perror("Error allocating memory for bmp image!");
        return 0;
    }
    tmp=malloc(si);
    if(tmp==0) {
        free(image);
        fclose(fp);
        perror("Error allocating memory for bmp tmp!");
        return 0;
    }

    image[si-1]=0;

    rewind(fp);

    while(br>=0) {
        br--;
        if(c<138) {
            fgetc(fp);
            c++;
            continue;
        }
        tmp[i++]=fgetc(fp);
    }

    fclose(fp);

    for(i=0;i<si;i++){
        image[i] = tmp[si-i-1];
    }

    free(tmp);

    return image;
}

void draw_image(unsigned char *image){
    unsigned int i=0;
    int c=0;
    unsigned int ch;

    XImage *img = XCreateImage(d,v,DefaultDepth(d,s),ZPixmap, 0, (char *)image, 500,500,32,0);

    /*
    while(image[i]!=0) {
        switch(c) {
            case 0:
                ch = image[i]<<16;
                c=1;
            case 1:
                ch+= image[i]<<8;
                c=2;
            case 2:
                ch+= image[i];
                c=0;
                XAddPixel(img, ch);
            default:
                perror("Error drawing image!");
        }
        i++;
    }*/

    XPutImage(d,w,DefaultGC(d,s),img,0,0,0,0,500,500);

    XDestroyImage(img);
}

void map_main_menu () {
    w = XCreateSimpleWindow (d, RootWindow (d, s), 100, 100, 500, 500, 10, 0x802222, 0xFFFFFF);
    XSelectInput (d, w, ExposureMask | KeyPressMask | KeyReleaseMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask);
    XMapWindow (d, w);

    XSetStandardProperties(d, w, "The life of Jesus", "tloj" , None, NULL, 0, NULL);

    ngb = XCreateSimpleWindow (d, w, 165, 372, 170, 54, 0, 0x802222, 0x808080);
    XSelectInput (d, w, ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask);
    XMapWindow (d, ngb);

    lgb = XCreateSimpleWindow (d, w, 165, 436, 170, 54, 0, 0x802222, 0x808080);
    XSelectInput (d, w, ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask);
    XMapWindow (d, lgb);

    AOI=load_bmp_image("imgs/AlphaOmegaMonogram_500x500.bmp");
}

void close_program() {
    if(AOI)
        free(AOI);
    XDestroyWindow(d, w);
    XCloseDisplay(d);
    exit(EXIT_SUCCESS);
}

int main (int argc, char *argv[]) {
    int x11_fd;
    fd_set in_fds;

    KeySym key;
    char text[255];

    setbuf (stdout, NULL);

    d = XOpenDisplay (NULL);

    if (d == NULL) {
        perror ("Cannot open display!");
        exit (EXIT_FAILURE);
    }

    s = DefaultScreen (d);

    v = DefaultVisual(d,s);

    map_main_menu ();

    // This returns the FD of the X11 display (or something like that)
    x11_fd = ConnectionNumber (d);

    /* Set our select timer. */
    tv.tv_usec = 0;
    tv.tv_sec = 0;

    while (looping) {
        // Create a File Description Set containing x11_fd
        FD_ZERO (&in_fds);
        FD_SET (x11_fd, &in_fds);

        // Wait for X Event or a Timer
        int num_ready_fds = select (x11_fd + 1, &in_fds, NULL, NULL, &tv);
        if (num_ready_fds > 0) {
            //printf("Event Received!\n");
        }
        else if (num_ready_fds < 0)
            printf ("An error occured with select!\n");

        // Handle XEvents and flush the input
        while (XPending (d)) {
            XNextEvent (d, &e);
            if (e.xany.window == w) {
                if (e.type == Expose) {
                    XDrawLine (d, w, DefaultGC (d, s), 10, 10, 100, 100);
                    draw_image(AOI);
                    XFlush (d);
                }
                if (e.type==KeyPress && XLookupString(&e.xkey, text, 255, &key, 0)==1){
                    if(text[0] == 'q') {
                        close_program();
                    }
                }
            }
            else if (e.xany.window == ngb) {
                if (e.type == ButtonPress) {
                    if (e.xbutton.button == 1) {
                        printf("GOT HERE!\n");
                    }
                }
                if (e.type == ButtonRelease) {
                    if (e.xbutton.button == 1) {
                    }
                }
            }
            else if (e.xany.window == lgb) {
                if (e.type == ButtonPress) {
                    if (e.xbutton.button == 1) {
                    }
                }
                if (e.type == ButtonRelease) {
                    if (e.xbutton.button == 1) {
                    }
                }
            }
        }
    }

    return 0;
}

这是图片https://pasteboard.co/HQezZBJHwXy6.bmp

我尝试将 bmp 文件中的数据从小端复制到大端，然后将该数据提供给 XCreateImage 函数，但打印效果并不完美。我期待它能打印出完美的图像。