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#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "meh.h"
extern Display *display;
/* Supported Formats */
extern struct imageformat libjpeg;
extern struct imageformat giflib;
extern struct imageformat libpng;
extern struct imageformat gif;
struct imageformat *formats[] = {
&libjpeg,
&gif,
&libpng,
&giflib,
NULL
};
void usage(){
printf("USAGE: meh [FILE1 [FILE2 [...]]]\n");
printf(" meh -list : treat stdin as list of files\n");
printf(" meh -ctl : display files as they are received on stdin\n");
exit(1);
}
struct image *imgopen(const char *filename){
struct image *img = NULL;
struct imageformat **fmt = formats;
FILE *f;
if((f = fopen(filename, "rb")) == NULL){
fprintf(stderr, "Cannot open '%s'\n", filename);
return NULL;
}
for(fmt = formats; *fmt; fmt++){
if((img = (*fmt)->open(f))){
img->fmt = *fmt;
return img;
}
}
fprintf(stderr, "Unknown file type: '%s'\n", filename);
return NULL;
}
struct imagenode{
struct imagenode *next, *prev;
char *filename;
};
struct imagenode *buildlist(int argc, char *argv[]){
struct imagenode *head = NULL, *tail = NULL, *tmp;
if(argc){
while(argc--){
tmp = malloc(sizeof(struct imagenode));
if(!head)
head = tail = tmp;
tmp->filename = *argv++;
tmp->prev = tail;
tail->next = tmp;
tail=tmp;
}
tail->next = head;
head->prev = tail;
return head;
}else{
fprintf(stderr, "No files to view\n");
exit(1);
}
}
struct imagenode *images;
const char *nextimage(){
images = images->next;
return images->filename;
}
const char *previmage(){
images = images->prev;
return images->filename;
}
void run(){
const char *(*direction)() = nextimage;
const char *filename = direction();
int width = 0, height = 0;
struct image *img = NULL;
int redraw = 0;
for(;;){
XEvent event;
for(;;){
if(redraw && !XPending(display))
break;
XNextEvent(display, &event);
switch(event.type){
case MapNotify:
break;
case ConfigureNotify:
if(width != event.xconfigure.width || height != event.xconfigure.height){
width = event.xconfigure.width;
height = event.xconfigure.height;
redraw = 1;
/* Some window managers need reminding */
if(img)
setaspect(img->width, img->height);
}
break;
case Expose:
redraw = 1;
break;
case KeyPress:
switch(XLookupKeysym(&event.xkey, 0)){
case XK_Escape:
exit(0);
break;
case XK_q:
exit(0);
break;
case XK_t:
case XK_n:
if(XLookupKeysym(&event.xkey, 0) == XK_t){
direction = nextimage;
}else{
direction = previmage;
}
filename = direction();
/* Pass through */
case XK_r:
if(img){
if(img->buf)
free(img->buf);
free(img);
}
img = NULL;
redraw = 1;
break;
case XK_Return:
puts(filename);
fflush(stdout);
break;
}
break;
}
}
if(redraw){
if(!img){
const char *firstimg = filename;
while(!(img = imgopen(filename))){
filename = direction();
if(filename == firstimg){
fprintf(stderr, "No valid images to view\n");
exit(1);
}
}
img->buf = NULL;
setaspect(img->width, img->height);
continue; /* make sure setaspect can do its thing */
}
if(!img->buf){
img->buf = malloc(3 * img->width * img->height);
if(img->fmt->read(img)){
fprintf(stderr, "read error!\n");
}
continue; /* Allow for some events to be read, read is slow */
}
drawimage(img, width, height);
redraw = 0;
}
}
}
int main(int argc, char *argv[]){
if(argc < 2)
usage();
xinit();
images = buildlist(argc - 1, &argv[1]);
run();
return 0;
}
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