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// based on x11_common.c/vo_x11.c from libvo
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <X11/Xmd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include "cpudetect.h"
char* mDisplayName=NULL;
Display* mDisplay=NULL;
Window mRootWin=None;
int mScreen=0;
XImage * mXImage = NULL;
GC vo_gc = NULL;
Pixmap mPixmap=0;
int vo_depthonscreen=0;
int vo_screenwidth=0;
int vo_screenheight=0;
int verbose=0;
int namecnt=0;
int main(int argc,char* argv[]){
unsigned int mask;
int bpp,depth;
mp_msg_init();
mp_msg_set_level(5);
GetCpuCaps(&gCpuCaps);
mDisplayName = XDisplayName(mDisplayName);
mDisplay=XOpenDisplay(mDisplayName);
if ( !mDisplay )
{
printf("vo: couldn't open the X11 display (%s)!\n",mDisplayName );
return 0;
}
mScreen=DefaultScreen( mDisplay ); // Screen ID.
mRootWin=RootWindow( mDisplay,mScreen );// Root window ID.
vo_screenwidth=DisplayWidth( mDisplay,mScreen );
vo_screenheight=DisplayHeight( mDisplay,mScreen );
// get color depth (from root window, or the best visual):
{ XWindowAttributes attribs;
XGetWindowAttributes(mDisplay, mRootWin, &attribs);
depth=vo_depthonscreen=attribs.depth;
}
mXImage=XGetImage( mDisplay,mRootWin,0,0,vo_screenwidth,vo_screenheight,AllPlanes,ZPixmap );
bpp=mXImage->bits_per_pixel;
if((vo_depthonscreen+7)/8 != (bpp+7)/8) vo_depthonscreen=bpp; // by A'rpi
mask=mXImage->red_mask|mXImage->green_mask|mXImage->blue_mask;
if(((vo_depthonscreen+7)/8)==2){
if(mask==0x7FFF) vo_depthonscreen=15; else
if(mask==0xFFFF) vo_depthonscreen=16;
}
printf("X11 running at %d x %d, %d bpp \n",vo_screenwidth,vo_screenheight,vo_depthonscreen);
mPixmap=XCreatePixmap(mDisplay,mRootWin,vo_screenwidth,vo_screenheight,depth);
{ XGCValues xgcv;
vo_gc=XCreateGC( mDisplay,mRootWin,0L,&xgcv );
}
if(argc<2){ printf("no filenames!\n");return;}
srand(time(NULL));
while(1){
FILE *f;
char* data;
int len;
int ret;
namecnt=1+(long long)rand()*(argc-1)/RAND_MAX;
//++namecnt; if(namecnt>=argc) namecnt=1;
if(namecnt<1 || namecnt>=argc) continue; // ???
f=fopen(argv[namecnt],"rb");if(!f) continue;
fseek(f,0,SEEK_END); len=ftell(f); fseek(f,0,SEEK_SET);
data=malloc(len);
len=fread(data,1,len,f);
fclose(f);
ret=decode_jpeg(data,len,mXImage->data,vo_screenwidth,vo_screenheight,
((vo_depthonscreen+7)/8)*vo_screenwidth,vo_depthonscreen);
free(data);
if(!ret) continue; // failed to load
XPutImage( mDisplay,mPixmap,vo_gc,mXImage,
0,0, 0,0, vo_screenwidth,vo_screenheight);
XSetWindowBackgroundPixmap(mDisplay,mRootWin,mPixmap);
XClearWindow(mDisplay,mRootWin);
XSync(mDisplay, True);
break; // DONE!
}
}
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