ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/cmd/jpg/jpg.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <draw.h>
#include <event.h>
#include <keyboard.h>
#include "imagefile.h"
int cflag = 0;
int dflag = 0;
int eflag = 0;
int jflag = 0;
int fflag = 0;
int Fflag = 0;
int nineflag = 0;
int threeflag = 0;
int colorspace = CYCbCr; /* default for 8-bit displays: combine color rotation with dither */
int output = 0;
ulong outchan = CMAP8;
Image *image;
int defaultcolor = 1;
enum{
Border = 2,
Edge = 5
};
char *show(int, char*, int);
Rectangle
imager(Image *i)
{
Point p1, p2;
p1 = addpt(divpt(subpt(i->r.max, i->r.min), 2), i->r.min);
p2 = addpt(divpt(subpt(screen->clipr.max, screen->clipr.min), 2), screen->clipr.min);
return rectaddpt(i->r, subpt(p2, p1));
}
void
eresized(int new)
{
Rectangle r;
if(new && getwindow(display, Refnone) < 0){
fprint(2, "jpg: can't reattach to window\n");
exits("resize");
}
if(image == nil)
return;
r = imager(image);
border(screen, r, -Border, nil, ZP);
drawop(screen, r, image, nil, image->r.min, S);
flushimage(display, 1);
}
void
main(int argc, char *argv[])
{
int fd, i, yflag;
char *err;
char buf[12+1];
yflag = 0;
ARGBEGIN{
case 'c': /* produce encoded, compressed, bitmap file; no display by default */
cflag++;
dflag++;
output++;
if(defaultcolor)
outchan = CMAP8;
break;
case 'd': /* suppress display of image */
dflag++;
break;
case 'e': /* disable floyd-steinberg error diffusion */
eflag++;
break;
case 'F':
Fflag++; /* make a movie */
fflag++; /* merge two fields per image */
break;
case 'f':
fflag++; /* merge two fields per image */
break;
case 'J': /* decode jpeg only; no display or remap (for debugging, etc.) */
jflag++;
break;
case 'k': /* force black and white */
defaultcolor = 0;
outchan = GREY8;
break;
case 'r':
colorspace = CRGB;
break;
case '3': /* produce encoded, compressed, three-color bitmap file; no display by default */
threeflag++;
/* fall through */
case 't': /* produce encoded, compressed, true-color bitmap file; no display by default */
cflag++;
dflag++;
output++;
defaultcolor = 0;
outchan = RGB24;
break;
case 'v': /* force RGBV */
defaultcolor = 0;
outchan = CMAP8;
break;
case 'y': /* leave it in CYCbCr; for debugging only */
yflag = 1;
colorspace = CYCbCr;
break;
case '9': /* produce plan 9, uncompressed, bitmap file; no display by default */
nineflag++;
dflag++;
output++;
if(defaultcolor)
outchan = CMAP8;
break;
default:
fprint(2, "usage: jpg -39cdefFkJrtvy [file.jpg ...]\n");
exits("usage");
}ARGEND;
if(yflag==0 && dflag==0 && colorspace==CYCbCr){ /* see if we should convert right to RGB */
fd = open("/dev/screen", OREAD);
if(fd >= 0){
buf[12] = '\0';
if(read(fd, buf, 12)==12 && chantodepth(strtochan(buf))>8)
colorspace = CRGB;
close(fd);
}
}
err = nil;
if(argc == 0)
err = show(0, "<stdin>", outchan);
else{
for(i=0; i<argc; i++){
fd = open(argv[i], OREAD);
if(fd < 0){
fprint(2, "jpg: can't open %s: %r\n", argv[i]);
err = "open";
}else{
err = show(fd, argv[i], outchan);
close(fd);
}
if((nineflag || cflag) && argc>1 && err==nil){
fprint(2, "jpg: exiting after one file\n");
break;
}
}
}
exits(err);
}
Rawimage**
vidmerge(Rawimage **aa1, Rawimage **aa2)
{
Rawimage **aao, *ao, *a1, *a2;
int i, c, row, col;
aao = nil;
for (i = 0; aa1[i]; i++) {
a1 = aa1[i];
a2 = aa2[i];
if (a2 == nil){
fprint(2, "jpg: vidmerge: unequal lengths\n");
return nil;
}
aao = realloc(aao, (i+2)*sizeof(Rawimage *));
if (aao == nil){
fprint(2, "jpg: vidmerge: realloc\n");
return nil;
}
aao[i+1] = nil;
ao = aao[i] = malloc(sizeof(Rawimage));
if (ao == nil){
fprint(2, "jpg: vidmerge: malloc\n");
return nil;
}
memcpy(ao, a1, sizeof(Rawimage));
if (!eqrect(a1->r , a2->r)){
fprint(2, "jpg: vidmerge: rects different in img %d\n", i);
return nil;
}
if (a1->cmaplen != a2->cmaplen){
fprint(2, "jpg: vidmerge: cmaplen different in img %d\n", i);
return nil;
}
if (a1->nchans != a2->nchans){
fprint(2, "jpg: vidmerge: nchans different in img %d\n", i);
return nil;
}
if (a1->fields != a2->fields){
fprint(2, "jpg: vidmerge: fields different in img %d\n", i);
return nil;
}
ao->r.max.y += Dy(ao->r);
ao->chanlen += ao->chanlen;
if (ao->chanlen != Dx(ao->r)*Dy(ao->r)){
fprint(2, "jpg: vidmerge: chanlen wrong %d != %d*%d\n",
ao->chanlen, Dx(ao->r), Dy(ao->r));
return nil;
}
row = Dx(a1->r);
for (c = 0; c < ao->nchans; c++) {
uchar *po, *p1, *p2;
ao->chans[c] = malloc(ao->chanlen);
if (ao->chans[c] == nil){
fprint(2, "jpg: vidmerge: malloc chan\n");
return nil;
}
po = ao->chans[c];
p1 = a1->chans[c];
p2 = a2->chans[c];
for (col = 0; col < Dy(a1->r); col++) {
memcpy(po, p1, row);
po += row, p1 += row;
memcpy(po, p2, row);
po += row, p2 += row;
}
free(a1->chans[c]);
free(a2->chans[c]);
}
if(a2->cmap != nil)
free(a2->cmap);
free(a1);
free(a2);
}
if (aa2[i] != nil)
fprint(2, "jpg: vidmerge: unequal lengths\n");
free(aa1);
free(aa2);
return aao;
}
char*
show(int fd, char *name, int outc)
{
Rawimage **array, *r, *c;
static int inited;
Image *i;
int j, ch, outchan;
Biobuf b;
char buf[32];
if(Binit(&b, fd, OREAD) < 0)
return nil;
outchan = outc;
rpt: array = Breadjpg(&b, colorspace);
if(array == nil || array[0]==nil){
fprint(2, "jpg: decode %s failed: %r\n", name);
return "decode";
}
if (fflag) {
Rawimage **a;
a = Breadjpg(&b, colorspace);
if(a == nil || a[0]==nil){
fprint(2, "jpg: decode %s-2 failed: %r\n", name);
return "decode";
}
array = vidmerge(a, array);
} else
Bterm(&b);
r = array[0];
c = nil;
if(jflag)
goto Return;
if(!dflag){
if (!inited) {
if(initdraw(0, 0, 0) < 0){
fprint(2, "jpg: initdraw failed: %r\n");
return "initdraw";
}
if(Fflag == 0)
einit(Ekeyboard|Emouse);
inited++;
}
if(defaultcolor && screen->depth>8 && outchan==CMAP8)
outchan = RGB24;
}
if(outchan == CMAP8)
c = torgbv(r, !eflag);
else{
if(outchan==GREY8 || (r->chandesc==CY && threeflag==0)){
c = totruecolor(r, CY);
outchan = GREY8;
}else
c = totruecolor(r, CRGB24);
}
if(c == nil){
fprint(2, "jpg: conversion of %s failed: %r\n", name);
return "torgbv";
}
if(!dflag){
if(c->chandesc == CY)
i = allocimage(display, c->r, GREY8, 0, 0);
else
i = allocimage(display, c->r, outchan, 0, 0);
if(i == nil){
fprint(2, "jpg: allocimage %s failed: %r\n", name);
return "allocimage";
}
if(loadimage(i, i->r, c->chans[0], c->chanlen) < 0){
fprint(2, "jpg: loadimage %s failed: %r\n", name);
return "loadimage";
}
image = i;
eresized(0);
if (Fflag) {
freeimage(i);
for(j=0; j<r->nchans; j++)
free(r->chans[j]);
free(r->cmap);
free(r);
free(array);
goto rpt;
}
if((ch=ekbd())=='q' || ch==Kdel || ch==Keof)
exits(nil);
draw(screen, screen->clipr, display->white, nil, ZP);
image = nil;
freeimage(i);
}
if(nineflag){
chantostr(buf, outchan);
print("%11s %11d %11d %11d %11d ", buf,
c->r.min.x, c->r.min.y, c->r.max.x, c->r.max.y);
if(write(1, c->chans[0], c->chanlen) != c->chanlen){
fprint(2, "jpg: %s: write error %r\n", name);
return "write";
}
}else if(cflag){
if(writerawimage(1, c) < 0){
fprint(2, "jpg: %s: write error: %r\n", name);
return "write";
}
}
Return:
for(j=0; j<r->nchans; j++)
free(r->chans[j]);
free(r->cmap);
free(r);
free(array);
if(c){
free(c->chans[0]);
free(c);
}
if (Fflag) goto rpt;
return nil;
}