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apple2ix/src/xvideo.c
Aaron Culliney e71efa3acd initial source drop, apple2-emul-0.7.4.tar.gz
2013-06-11 00:08:15 -07:00

852 lines
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/*
* Apple // emulator for Linux: X-Windows graphics support
*
* Copyright 1994 Alexander Jean-Claude Bottema
* Copyright 1995 Stephen Lee
* Copyright 1997, 1998 Aaron Culliney
* Copyright 1998, 1999, 2000 Michael Deutschmann
*
* This software package is subject to the GNU General Public License
* version 2 or later (your choice) as published by the Free Software
* Foundation.
*
* THERE ARE NO WARRANTIES WHATSOEVER.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/extensions/XShm.h>/* MITSHM! */
#include "video.h"
#include "misc.h"
#include "keys.h"
/* copied from svideo.c (didn't bother to rename!) */
static unsigned char *svga_GM;
static unsigned char vga_mem_page_0[SCANWIDTH*SCANHEIGHT]; /* page0 framebuffer */
static unsigned char vga_mem_page_1[SCANWIDTH*SCANHEIGHT]; /* page1 framebuffer */
static Display *display;
static Window win;
static GC gc;
static unsigned int width, height; /* window size */
static int screen_num;
static Visual* visual;
static XVisualInfo visualinfo;
static XColor colors[256];
XImage *image;
static Colormap cmap;
XEvent xevent;
int doShm = 1;/* assume true */
XShmSegmentInfo xshminfo;
int xshmeventtype;
/* -------------------------------------------------------------------------
video_setpage(p): Switch to screen page p
------------------------------------------------------------------------- */
void video_setpage(int p)
{
if (p == video__current_page) return;
if (p)
{
memcpy(vga_mem_page_0,svga_GM,SCANWIDTH*SCANHEIGHT);
memcpy(svga_GM,vga_mem_page_1,SCANWIDTH*SCANHEIGHT);
video__current_page = 1;
video__fb1 = vga_mem_page_0;
video__fb2 = svga_GM;
}
else
{
memcpy(vga_mem_page_1,svga_GM,SCANWIDTH*SCANHEIGHT);
memcpy(svga_GM,vga_mem_page_0,SCANWIDTH*SCANHEIGHT);
video__current_page = 0;
video__fb1 = svga_GM;
video__fb2 = vga_mem_page_1;
}
}
/*
* XShm code influenced from the DOOM source code.
* This tries to find some shared memory to use. It checks for stale segments
* (maybe due to an emulator crash) and tries to remove them or use them.
*/
static void getshm(int size) {
int key = ('a'<<24) | ('p'<<16) | ('p'<<8) | 'l';
struct shmid_ds shminfo;
int id;
int rc;
int counter=5;
/* Try to allocate shared memory segment. Use stale segments if any are
* found.
*/
do
{
id = shmget((key_t) key, 0, 0777);
if (id != -1)
{
/* we got someone else's ID. check if it's stale. */
printf("Found shared memory key=`%c%c%c%c', id=%d\n",
(key & 0xff000000)>>24,
(key & 0xff0000)>>16,
(key & 0xff00)>>8,
(key & 0xff),
id
);
rc=shmctl(id, IPC_STAT, &shminfo); /* get stats */
if (!rc) {
/* someone's using the emulator */
if (shminfo.shm_nattch) {
printf( "User uid=%d, key=`%c%c%c%c' appears to be running "
"the emulator.\n",
shminfo.shm_perm.cuid,
(key & 0xff000000)>>24,
(key & 0xff0000)>>16,
(key & 0xff00)>>8,
(key & 0xff)
);
++key; /* increase the key count */
}
/* found a stale ID. */
else {
/* it's my stale ID */
if (getuid() == shminfo.shm_perm.cuid) {
rc = shmctl(id, IPC_RMID, 0);
if (!rc)
printf("Was able to kill my old shared memory\n");
else {
perror("shmctl");
printf("Was NOT able to kill my old shared memory\n");
}
id = shmget((key_t)key, size, IPC_CREAT|0777);
if (id == -1) {
perror("shmget");
printf("Could not get shared memory\n");
}
rc=shmctl(id, IPC_STAT, &shminfo);
if (rc) {
perror("shmctl");
}
break;
}
/* not my ID, but maybe we can use it */
if (size == shminfo.shm_segsz) {
printf( "Will use stale shared memory of uid=%d\n",
shminfo.shm_perm.cuid);
break;
}
/* not my ID, and we can't use it */
else {
printf( "Can't use stale shared memory belonging to uid=%d, "
"key=`%c%c%c%c', id=%d\n",
shminfo.shm_perm.cuid,
(key & 0xff000000)>>24,
(key & 0xff0000)>>16,
(key & 0xff00)>>8,
(key & 0xff),
id
);
++key;
}
}
}
else
{
/* oops. what to do now? */
perror("shmctl");
printf( "Could not get stats on key=`%c%c%c%c', id=%d\n",
(key & 0xff000000)>>24,
(key & 0xff0000)>>16,
(key & 0xff00)>>8,
(key & 0xff),
id
);
++key;
}
}
else
{
/* no stale ID's */
id = shmget((key_t)key, size, IPC_CREAT|0777);
if (id == -1) {
perror("shmget");
printf("Could not get shared memory\n");
++key;
}
break;
}
} while (--counter);
if (!counter)
{
printf( "System has too many stale/used "
"shared memory segments!\n");
}
xshminfo.shmid = id;
/* attach to the shared memory segment */
image->data = xshminfo.shmaddr = shmat(id, 0, 0);
if (image->data == -1) {
perror("shmat");
printf("Could not attach to shared memory\n");
exit(1);
}
printf( "Using shared memory key=`%c%c%c%c', id=%d, addr=0x%x\n",
(key & 0xff000000)>>24,
(key & 0xff0000)>>16,
(key & 0xff00)>>8,
(key & 0xff),
id,
(int) (image->data));
}
static void c_initialize_colors() {
static unsigned char col2[ 3 ] = {255,255,255};
static int firstcall = 1;
int c,i,j;
if (visualinfo.class == PseudoColor && visualinfo.depth == 8)
{
/* initialize the colormap */
if (firstcall) {
firstcall = 0;
for (i=0; i<256; i++) {
colors[i].pixel = i;
colors[i].flags = DoRed|DoGreen|DoBlue;
}
}
/* align the palette for hires graphics */
for (i = 0; i < 8; i++) {
for (j = 0; j < 3; j++) {
c = (i & 1) ? col2[ j ] : 0;
colors[ j+i*3+32].red = (c<<8) + c;
c = (i & 2) ? col2[ j ] : 0;
colors[ j+i*3+32].green = (c<<8) + c;
c = (i & 4) ? col2[ j ] : 0;
colors[ j+i*3+32].blue = (c<<8) + c;
}
}
colors[ COLOR_FLASHING_BLACK].red = 0;
colors[ COLOR_FLASHING_BLACK].green = 0;
colors[ COLOR_FLASHING_BLACK].blue = 0;
colors[ COLOR_LIGHT_WHITE].red = (255<<8)|255;
colors[ COLOR_LIGHT_WHITE].green = (255<<8)|255;
colors[ COLOR_LIGHT_WHITE].blue = (255<<8)|255;
colors[ COLOR_FLASHING_WHITE].red = (255<<8)|255;
colors[ COLOR_FLASHING_WHITE].green = (255<<8)|255;
colors[ COLOR_FLASHING_WHITE].blue = (255<<8)|255;
colors[0x00].red = 0; colors[0x00].green = 0;
colors[0x00].blue = 0; /* Black */
colors[0x10].red = 195; colors[0x10].green = 0;
colors[0x10].blue = 48; /* Magenta */
colors[0x20].red = 0; colors[0x20].green = 0;
colors[0x20].blue = 130; /* Dark Blue */
colors[0x30].red = 166; colors[0x30].green = 52;
colors[0x30].blue = 170; /* Purple */
colors[0x40].red = 0; colors[0x40].green = 146;
colors[0x40].blue = 0; /* Dark Green */
colors[0x50].red = 105; colors[0x50].green = 105;
colors[0x50].blue = 105; /* Dark Grey*/
colors[0x60].red = 113; colors[0x60].green = 24;
colors[0x60].blue = 255; /* Medium Blue */
colors[0x70].red = 12; colors[0x70].green = 190;
colors[0x70].blue = 235; /* Light Blue */
colors[0x80].red = 150; colors[0x80].green = 85;
colors[0x80].blue = 40; /* Brown */
colors[0x90].red = 255; colors[0xa0].green = 24;
colors[0x90].blue = 44; /* Orange */
colors[0xa0].red = 150; colors[0xa0].green = 170;
colors[0xa0].blue = 170; /* Light Gray */
colors[0xb0].red = 255; colors[0xb0].green = 158;
colors[0xb0].blue = 150; /* Pink */
colors[0xc0].red = 0; colors[0xc0].green = 255;
colors[0xc0].blue = 0; /* Green */
colors[0xd0].red = 255; colors[0xd0].green = 255;
colors[0xd0].blue = 0; /* Yellow */
colors[0xe0].red = 130; colors[0xe0].green = 255;
colors[0xe0].blue = 130; /* Aqua */
colors[0xf0].red = 255; colors[0xf0].green = 255;
colors[0xf0].blue = 255; /* White */
/* mirror of lores colors optimized for dhires code */
colors[0x00].red = 0; colors[0x00].green = 0;
colors[0x00].blue = 0; /* Black */
colors[0x08].red = 195; colors[0x08].green = 0;
colors[0x08].blue = 48; /* Magenta */
colors[0x01].red = 0; colors[0x01].green = 0;
colors[0x01].blue = 130; /* Dark Blue */
colors[0x09].red = 166; colors[0x09].green = 52;
colors[0x09].blue = 170; /* Purple */
colors[0x02].red = 0; colors[0x02].green = 146;
colors[0x02].blue = 0; /* Dark Green */
colors[0x0a].red = 105; colors[0x0A].green = 105;
colors[0x0a].blue = 105; /* Dark Grey*/
colors[0x03].red = 113; colors[0x03].green = 24;
colors[0x03].blue = 255; /* Medium Blue */
colors[0x0b].red = 12; colors[0x0b].green = 190;
colors[0x0b].blue = 235; /* Light Blue */
colors[0x04].red = 150; colors[0x04].green = 85;
colors[0x04].blue = 40; /* Brown */
colors[0x0c].red = 255; colors[0x0c].green = 24;
colors[0x0c].blue = 44; /* Orange */
colors[0x05].red = 150; colors[0x05].green = 170;
colors[0x05].blue = 170; /* Light Gray */
colors[0x0d].red = 255; colors[0x0d].green = 158;
colors[0x0d].blue = 150; /* Pink */
colors[0x06].red = 0; colors[0x06].green = 255;
colors[0x06].blue = 0; /* Green */
colors[0x0e].red = 255; colors[0x0e].green = 255;
colors[0x0e].blue = 0; /* Yellow */
colors[0x07].red = 130; colors[0x07].green = 255;
colors[0x07].blue = 130; /* Aqua */
colors[0x0f].red = 255; colors[0x0f].green = 255;
colors[0x0f].blue = 255; /* White */
for (i=0; i<16; i++) {
colors[i].red = (colors[i].red<<8) | colors[i].red;
colors[i].green = (colors[i].green<<8) | colors[i].green;
colors[i].blue = (colors[i].blue<<8) | colors[i].blue;
colors[i<<4].red = (colors[i<<4].red<<8) | colors[i<<4].red;
colors[i<<4].green = (colors[i<<4].green<<8) | colors[i<<4].green;
colors[i<<4].blue = (colors[i<<4].blue<<8) | colors[i<<4].blue;
}
// store the colors to the current colormap
XStoreColors(display, cmap, colors, 256);
}
}
/* HACK: this is incredibly broken.
* Map the X keysyms back into scancodes so the routines in keys.c can deal
* with it. We do this to be compatible with what the SVGAlib version does.
*/
static int keysym_to_scancode(void) {
static int rc = 0xFF;
switch(rc = XKeycodeToKeysym(display, xevent.xkey.keycode, 0))
{
case XK_F1:
rc = 59; break;
case XK_F2:
rc = 60; break;
case XK_F3:
rc = 61; break;
case XK_F4:
rc = 62; break;
case XK_F5:
rc = 63; break;
case XK_F6:
rc = 64; break;
case XK_F7:
rc = 65; break;
case XK_F8:
rc = 66; break;
case XK_F9:
rc = 67; break;
case XK_F10:
rc = 68; break;
case XK_Left:
rc = 105; break;
case XK_Right:
rc = 106; break;
case XK_Down:
rc = 108; break;
case XK_Up:
rc = 103; break;
case XK_Escape:
rc = 1; break;
case XK_Return:
rc = 28; break;
case XK_Tab:
rc = 15; break;
case XK_Shift_L:
rc = SCODE_L_SHIFT; break;
case XK_Shift_R:
rc = SCODE_R_SHIFT; break;
case XK_Control_L:
rc = SCODE_L_CTRL; break;
case XK_Control_R:
rc = SCODE_R_CTRL; break;
case XK_Caps_Lock:
rc = SCODE_CAPS; break;
case XK_BackSpace:
rc = 14; break;
case XK_Insert:
rc = 110; break;
case XK_Pause:
rc = 119; break;
case XK_Break:
/* Pause and Break are the same key, but have different
* scancodes (on PC keyboards). Ctrl makes the difference.
*
* We assume the X server is passing along the distinction to us,
* rather than making us check Ctrl manually.
*/
rc = 101; break;
case XK_Print:
rc = 99; break;
case XK_Delete:
rc = 111; break;
case XK_End:
rc = 107; break;
case XK_Home:
rc = 102; break;
case XK_Page_Down:
rc = 109; break;
case XK_Page_Up:
rc = 104; break;
// keypad joystick movement
case XK_KP_5:
case XK_KP_Begin:
rc = SCODE_J_C; break;
case XK_KP_4:
case XK_KP_Left:
rc = SCODE_J_L; break;
case XK_KP_8:
case XK_KP_Up:
rc = SCODE_J_U; break;
case XK_KP_6:
case XK_KP_Right:
rc = SCODE_J_R; break;
case XK_KP_2:
case XK_KP_Down:
rc = SCODE_J_D; break;
case XK_Alt_L:
rc = 56; break;
case XK_Alt_R:
rc = 100; break;
default:
if ((rc >= XK_space) && (rc <= XK_asciitilde))
rc = xevent.xkey.keycode - 8;
break;
}
return rc & 0xFF;/* normalize */
}
static void post_image() {
if (doShm) {
if (!XShmPutImage(
display,
win,
gc,
image,
0, 0,
0, 0,
SCANWIDTH, SCANHEIGHT,
True))
fprintf(stderr, "XShmPutImage() failed\n");
} else {
if (XPutImage(
display,
win,
gc,
image,
0, 0,
0, 0,
SCANWIDTH, SCANHEIGHT
))
fprintf(stderr, "XPutImage() failed\n");
}
}
static void c_flash_cursor(int on) {
// flash only if it's text or mixed modes.
if (softswitches & (SS_TEXT|SS_MIXED)) {
if (!on) {
colors[ COLOR_FLASHING_BLACK].red = 0;
colors[ COLOR_FLASHING_BLACK].green = 0;
colors[ COLOR_FLASHING_BLACK].blue = 0;
colors[ COLOR_FLASHING_WHITE].red = 0xffff;
colors[ COLOR_FLASHING_WHITE].green = 0xffff;
colors[ COLOR_FLASHING_WHITE].blue = 0xffff;
} else {
colors[ COLOR_FLASHING_WHITE].red = 0;
colors[ COLOR_FLASHING_WHITE].green = 0;
colors[ COLOR_FLASHING_WHITE].blue = 0;
colors[ COLOR_FLASHING_BLACK].red = 0xffff;
colors[ COLOR_FLASHING_BLACK].green = 0xffff;
colors[ COLOR_FLASHING_BLACK].blue = 0xffff;
}
// store the colors to the current colormap
XStoreColors(display, cmap, colors, 256);
}
}
/* FIXME: blocking not implemented... */
void video_sync(int block) {
static int flash_count = 0;
// post the image and loop waiting for it to finish and
// also process other input events
post_image();
LOOP:
if (doShm)
XNextEvent(
display,
&xevent);
else if (!XCheckMaskEvent(
display,
KeyPressMask|KeyReleaseMask,
&xevent))
goto POLL_FINISHED;
switch (xevent.type) {
case KeyPress:
c_read_raw_key(keysym_to_scancode(), 1);
break;
case KeyRelease:
c_read_raw_key(keysym_to_scancode(), 0);
break;
default:
if (xevent.type == xshmeventtype)
goto POLL_FINISHED;
break;
}
goto LOOP;
POLL_FINISHED:
switch (++flash_count)
{
case 6:
c_flash_cursor(1);
break;
case 12:
c_flash_cursor(0);
flash_count = 0;
break;
default:
break;
}
}
static Cursor hidecursor() {
Pixmap cursormask;
XGCValues xgc;
XColor dummycolour;
Cursor cursor;
cursormask = XCreatePixmap(display, win, 1, 1, 1/*depth*/);
xgc.function = GXclear;
gc = XCreateGC(display, cursormask, GCFunction, &xgc);
XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
dummycolour.pixel = 0;
dummycolour.red = 0;
dummycolour.flags = 04;
cursor = XCreatePixmapCursor(display, cursormask, cursormask,
&dummycolour,&dummycolour, 0,0);
XFreePixmap(display,cursormask);
XFreeGC(display,gc);
return cursor;
}
static void parseArgs() {
int i;
for (i=0; i<argc; i++) {
if (strstr(argv[i], "-noshm"))
doShm=0;
}
}
void video_init() {
XSetWindowAttributes attribs;
unsigned long attribmask;
int x, y; /* window position */
int drawingok;
unsigned int display_width, display_height;
XGCValues xgcvalues;
int valuemask;
char *window_name = "Apple ][";
char *icon_name = window_name;
XSizeHints *size_hints;
XWMHints *wm_hints;
XClassHint *class_hints;
XTextProperty windowName, iconName;
GC gc;
char *progname;/* name this program was invoked by */
char *displayname = NULL;
progname = argv[0];
/* give up root privileges. equivalent of vga_init() */
setegid(getgid());
seteuid(getuid());
parseArgs();
if (!(size_hints = XAllocSizeHints())) {
fprintf(stderr, "cannot allocate memory for SizeHints\n");
exit(1);
}
if (!(wm_hints = XAllocWMHints())) {
fprintf(stderr, "cannot allocate memory for WMHints\n");
exit(1);
}
if (!(class_hints = XAllocClassHint())) {
fprintf(stderr, "cannot allocate memory for ClassHints\n");
exit(1);
}
/* connect to X server */
if ( (display=XOpenDisplay(displayname)) == NULL )
{
fprintf(stderr, "cannot connect to X server \"%s\"\n",
XDisplayName(displayname));
exit(1);
}
/* get screen size from display structure macro */
screen_num = DefaultScreen(display);
if (!XMatchVisualInfo(display, screen_num, 8, PseudoColor, &visualinfo)) {
fprintf(stderr,
"Sorry bud, xapple2 only supports "
"8bit PseudoColor displays.\n"
"Maybe you can fix this!\n");
exit(1);
}
visual = visualinfo.visual;
display_width = DisplayWidth(display, screen_num);
display_height = DisplayHeight(display, screen_num);
/* Note that in a real application, x and y would default to 0
* but would be settable from the command line or resource database.
*/
x = y = 0;
width = SCANWIDTH, height = SCANHEIGHT;
/* init MITSHM if we're doing it */
if (doShm) {
/* make sure we have it */
doShm = XShmQueryExtension(display);
/* and it's a local connection */
if (!displayname)
displayname = getenv("DISPLAY");
if (displayname)
{
if ((*displayname != ':') || !doShm) {
printf("Cannot run MITSHM version of emulator "
"with display \"%s\"\n"
"Try something like \":0.0\". "
"Reverting to regular X with no sound.\n",
displayname);
doShm = 0;
soundAllowed=0;
c_initialize_sound();
}
}
} else {
/* and it's a local connection */
if (!displayname)
displayname = getenv("DISPLAY");
if (displayname)
{
if (*displayname != ':') {
printf("Sound not allowed for remote display \"%s\".\n",
displayname);
soundAllowed=0;
c_initialize_sound();
}
}
}
/* initialize colors */
cmap = XCreateColormap(display, RootWindow(display, screen_num),
visual, AllocAll);
c_initialize_colors();
attribs.colormap = cmap;
attribs.border_pixel = 0;
/* select event types wanted */
attribmask = CWEventMask | CWColormap | CWBorderPixel;/* HACK CWBorderPixel? */
attribs.event_mask =
KeyPressMask
| KeyReleaseMask
| ExposureMask;
/* create opaque window */
win = XCreateWindow(display, RootWindow(display,screen_num),
x, y, width, height,
0,/* border_width */
8,/* depth */
InputOutput,
visual,
attribmask,
&attribs);
/* set size hints for window manager. We don't want the user to
* dynamically allocate window size since we won't do the right
* scaling in response. Whaddya want, performance or a snazzy gui?
*/
size_hints->flags = PPosition | PSize | PMinSize | PMaxSize;
size_hints->min_width = width;
size_hints->min_height = height;
size_hints->max_width = width;
size_hints->max_height = height;
/* store window_name and icon_name for niceity. */
if (XStringListToTextProperty(&window_name, 1, &windowName) == 0) {
fprintf(stderr, "structure allocation for windowName failed.\n");
exit(1);
}
if (XStringListToTextProperty(&icon_name, 1, &iconName) == 0) {
fprintf(stderr, "structure allocation for iconName failed.\n");
exit(1);
}
wm_hints->initial_state = NormalState;
wm_hints->input = True;
wm_hints->flags = StateHint | IconPixmapHint/* | InputHint*/;
class_hints->res_name = progname;
class_hints->res_class = "Apple2";
XSetWMProperties(display, win, &windowName, &iconName,
argv, argc, size_hints, wm_hints,
class_hints);
XDefineCursor(display, win, hidecursor(display, win));
/* create the GC */
valuemask = GCGraphicsExposures;
xgcvalues.graphics_exposures = False;
gc = XCreateGC(
display,
win,
valuemask,
&xgcvalues);
/* display window */
XMapWindow(display, win);
/* wait until it is OK to draw */
drawingok = 0;
while (!drawingok)
{
XNextEvent(display, &xevent);
if ((xevent.type == Expose) && !xevent.xexpose.count)
{
drawingok = 1;
}
}
xshmeventtype = XShmGetEventBase(display) + ShmCompletion;
/* create the image */
if (doShm) {
image = XShmCreateImage(
display,
visual,
8,
ZPixmap,
0,
&xshminfo,
SCANWIDTH,
SCANHEIGHT);
if (!image) {
fprintf(stderr, "XShmCreateImage failed\n");
exit(1);
}
printf("Allocating shared memory %dx%d region\n",
image->bytes_per_line, image->height);
getshm(image->bytes_per_line * image->height);
/* get the X server to attach to it */
if (!XShmAttach(display, &xshminfo)) {
fprintf(stderr, "XShmAttach() failed in InitGraphics()\n");
exit(1);
}
} else {
char *data = malloc(SCANWIDTH*SCANHEIGHT*sizeof(unsigned char));
if (!data) {
fprintf(stderr, "no memory for image data!\n");
exit(1);
}
printf("Creating regular XImage\n");
image = XCreateImage(
display,
visual,
8,
ZPixmap,
0,
data,
SCANWIDTH,
SCANHEIGHT,
8/*bitmap_pad*/,
SCANWIDTH/*bytes_per_line*/);
if (!image) {
fprintf(stderr, "XCreateImage failed\n");
exit(1);
}
}
svga_GM = video__fb1 = image->data;
video__fb2 = vga_mem_page_1;
memset(video__fb1,0,SCANWIDTH*SCANHEIGHT);
memset(video__fb2,0,SCANWIDTH*SCANHEIGHT);
}
void video_shutdown(void)
{
if (doShm) {
// Detach from X server
if (!XShmDetach(display, &xshminfo))
fprintf(stderr,"XShmDetach() failed in video_shutdown()\n");
// Release shared memory.
shmdt(xshminfo.shmaddr);
shmctl(xshminfo.shmid, IPC_RMID, 0);
// Paranoia.
image->data = NULL;
} else {
free(image->data);
}
exit(0);
}
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