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/*
* Example on using the TGA Referance Library.
*
*
* cc tga.c tgaexample.c -o tgaexample -lX11 -L/usr/X11/lib
*/
#include <stdio.h>
#include "../include/tga.h"
#include <X11/X.h>
#include <X11/Xlib.h>
/*
#include "toggle_btn0.h"
*/
int main(int argc, char *argv[])
{
int status;
Display *dpy;
Window root_w, w;
XImage *ximage;
unsigned int depth;
int scr_num;
Screen *scr_ptr;
GC gc;
event_t xevent;
tga_data_struct td;
unsigned char *img_data;
long img_len8;
if(argc < 2)
{
fprintf(stderr, "%s: What file do you want to display?\n",
argv[0]
);
return(1);
}
/* Set up X resources. */
dpy = XOpenDisplay(NULL);
scr_num = DefaultScreen(dpy);
scr_ptr = DefaultScreenOfDisplay(dpy);
depth = DefaultDepthOfScreen(scr_ptr);
gc = DefaultGC(dpy, scr_num);
root_w = DefaultRootWindow(dpy);
/* Load the image. */
status = TgaReadFromFile(argv[1], &td, depth);
/*
status = TgaReadFromData(toggle_btn0, &td, depth);
*/
if(status != TgaSuccess)
{
fprintf(stderr,
"%s: Cannot read image.\n",
argv[1]
);
XCloseDisplay(dpy); dpy = NULL;
return(1);
}
/* Create a segment of data to copy the loaded data to. */
img_len8 = (long)td.width * (long)td.height *
(long)td.data_depth / 8;
img_data = (unsigned char *)calloc(1, img_len8 * sizeof(unsigned char));
memcpy(img_data, td.data, img_len8);
w = XCreateSimpleWindow(dpy, root_w, 0, 0, td.width, td.height, 0,
BlackPixel(dpy, scr_num), BlackPixel(dpy, scr_num));
XSelectInput(dpy, w, KeyPressMask | ButtonReleaseMask
| ExposureMask);
ximage = XCreateImage(
dpy,
DefaultVisual(dpy, scr_num),
depth,
ZPixmap,
0,
(char *)img_data,
td.width, td.height,
td.data_depth,
0
);
XMapRaised(dpy, w);
/* We don't need any tga data after this point. */
TgaDestroyData(&td);
XPutImage(dpy, (Drawable)w, gc, ximage, 0, 0, 0, 0, ximage->width,
ximage->height);
while(1)
{
XNextEvent(dpy, &xevent);
XPutImage(dpy, (Drawable)w, gc, ximage, 0, 0, 0, 0, ximage->width,
ximage->height);
if( (xevent.type == KeyPress) ||
(xevent.type == ButtonRelease)
)
break;
}
XDestroyImage(ximage);
XCloseDisplay(dpy); dpy = NULL;
return(0);
}
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