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331
src/cmd/page/gfx.c
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331
src/cmd/page/gfx.c
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/*
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* graphics file reading for page
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*/
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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#include <bio.h>
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#include "page.h"
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typedef struct Convert Convert;
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typedef struct GfxInfo GfxInfo;
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typedef struct Graphic Graphic;
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struct Convert {
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char *name;
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char *cmd;
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char *truecmd; /* cmd for true color */
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};
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struct GfxInfo {
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Graphic *g;
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};
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struct Graphic {
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int type;
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char *name;
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uchar *buf; /* if stdin */
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int nbuf;
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};
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enum {
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Ipic,
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Itiff,
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Ijpeg,
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Igif,
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Iinferno,
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Ifax,
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Icvt2pic,
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Iplan9bm,
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Iccittg4,
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Ippm,
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Ipng,
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Iyuv,
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Ibmp,
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};
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/*
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* N.B. These commands need to read stdin if %a is replaced
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* with an empty string.
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*/
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Convert cvt[] = {
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[Ipic] { "plan9", "fb/3to1 rgbv %a |fb/pcp -tplan9" },
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[Itiff] { "tiff", "fb/tiff2pic %a | fb/3to1 rgbv | fb/pcp -tplan9" },
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[Iplan9bm] { "plan9bm", nil },
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[Ijpeg] { "jpeg", "jpg -9 %a", "jpg -t9 %a" },
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[Igif] { "gif", "gif -9 %a", "gif -t9 %a" },
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[Iinferno] { "inferno", nil },
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[Ifax] { "fax", "aux/g3p9bit -g %a" },
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[Icvt2pic] { "unknown", "fb/cvt2pic %a |fb/3to1 rgbv" },
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[Ippm] { "ppm", "ppm -9 %a", "ppm -t9 %a" },
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/* ``temporary'' hack for hobby */
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[Iccittg4] { "ccitt-g4", "cat %a|rx nslocum /usr/lib/ocr/bin/bcp -M|fb/pcp -tcompressed -l0" },
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[Ipng] { "png", "png -9 %a", "png -t9 %a" },
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[Iyuv] { "yuv", "yuv -9 %a", "yuv -t9 %a" },
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[Ibmp] { "bmp", "bmp -9 %a", "bmp -t9 %a" },
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};
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static Image* convert(Graphic*);
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static Image* gfxdrawpage(Document *d, int page);
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static char* gfxpagename(Document*, int);
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static int spawnrc(char*, uchar*, int);
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static int addpage(Document*, char*);
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static int rmpage(Document*, int);
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static int genaddpage(Document*, char*, uchar*, int);
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static char*
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gfxpagename(Document *doc, int page)
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{
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GfxInfo *gfx = doc->extra;
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return gfx->g[page].name;
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}
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static Image*
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gfxdrawpage(Document *doc, int page)
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{
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GfxInfo *gfx = doc->extra;
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return convert(gfx->g+page);
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}
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Document*
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initgfx(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
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{
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GfxInfo *gfx;
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Document *doc;
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int i;
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USED(b);
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doc = emalloc(sizeof(*doc));
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gfx = emalloc(sizeof(*gfx));
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gfx->g = nil;
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doc->npage = 0;
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doc->drawpage = gfxdrawpage;
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doc->pagename = gfxpagename;
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doc->addpage = addpage;
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doc->rmpage = rmpage;
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doc->extra = gfx;
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doc->fwdonly = 0;
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fprint(2, "reading through graphics...\n");
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if(argc==0 && buf)
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genaddpage(doc, nil, buf, nbuf);
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else{
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for(i=0; i<argc; i++)
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if(addpage(doc, argv[i]) < 0)
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fprint(2, "warning: not including %s: %r\n", argv[i]);
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}
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return doc;
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}
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static int
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genaddpage(Document *doc, char *name, uchar *buf, int nbuf)
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{
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Graphic *g;
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GfxInfo *gfx;
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Biobuf *b;
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uchar xbuf[32];
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int i, l;
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l = 0;
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gfx = doc->extra;
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assert((name == nil) ^ (buf == nil));
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assert(name != nil || doc->npage == 0);
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for(i=0; i<doc->npage; i++)
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if(strcmp(gfx->g[i].name, name) == 0)
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return i;
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if(name){
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l = strlen(name);
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if((b = Bopen(name, OREAD)) == nil) {
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werrstr("Bopen: %r");
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return -1;
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}
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if(Bread(b, xbuf, sizeof xbuf) != sizeof xbuf) {
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werrstr("short read: %r");
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return -1;
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}
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Bterm(b);
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buf = xbuf;
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nbuf = sizeof xbuf;
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}
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gfx->g = erealloc(gfx->g, (doc->npage+1)*(sizeof(*gfx->g)));
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g = &gfx->g[doc->npage];
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memset(g, 0, sizeof *g);
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if(memcmp(buf, "GIF", 3) == 0)
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g->type = Igif;
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else if(memcmp(buf, "\111\111\052\000", 4) == 0)
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g->type = Itiff;
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else if(memcmp(buf, "\115\115\000\052", 4) == 0)
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g->type = Itiff;
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else if(memcmp(buf, "\377\330\377", 3) == 0)
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g->type = Ijpeg;
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else if(memcmp(buf, "\211PNG\r\n\032\n", 3) == 0)
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g->type = Ipng;
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else if(memcmp(buf, "compressed\n", 11) == 0)
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g->type = Iinferno;
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else if(memcmp(buf, "\0PC Research, Inc", 17) == 0)
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g->type = Ifax;
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else if(memcmp(buf, "TYPE=ccitt-g31", 14) == 0)
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g->type = Ifax;
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else if(memcmp(buf, "II*", 3) == 0)
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g->type = Ifax;
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else if(memcmp(buf, "TYPE=ccitt-g4", 13) == 0)
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g->type = Iccittg4;
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else if(memcmp(buf, "TYPE=", 5) == 0)
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g->type = Ipic;
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else if(buf[0] == 'P' && '0' <= buf[1] && buf[1] <= '9')
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g->type = Ippm;
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else if(memcmp(buf, "BM", 2) == 0)
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g->type = Ibmp;
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else if(memcmp(buf, " ", 10) == 0 &&
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'0' <= buf[10] && buf[10] <= '9' &&
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buf[11] == ' ')
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g->type = Iplan9bm;
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else if(strtochan((char*)buf) != 0)
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g->type = Iplan9bm;
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else if (l > 4 && strcmp(name + l -4, ".yuv") == 0)
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g->type = Iyuv;
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else
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g->type = Icvt2pic;
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if(name)
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g->name = estrdup(name);
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else{
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g->name = estrdup("stdin"); /* so it can be freed */
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g->buf = buf;
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g->nbuf = nbuf;
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}
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if(chatty) fprint(2, "classified \"%s\" as \"%s\"\n", g->name, cvt[g->type].name);
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return doc->npage++;
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}
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static int
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addpage(Document *doc, char *name)
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{
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return genaddpage(doc, name, nil, 0);
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}
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static int
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rmpage(Document *doc, int n)
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{
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int i;
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GfxInfo *gfx;
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if(n < 0 || n >= doc->npage)
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return -1;
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gfx = doc->extra;
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doc->npage--;
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free(gfx->g[n].name);
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for(i=n; i<doc->npage; i++)
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gfx->g[i] = gfx->g[i+1];
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if(n < doc->npage)
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return n;
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if(n == 0)
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return 0;
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return n-1;
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}
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static Image*
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convert(Graphic *g)
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{
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int fd;
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Convert c;
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char *cmd;
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char *name, buf[1000];
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Image *im;
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int rcspawned = 0;
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Waitmsg *w;
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c = cvt[g->type];
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if(c.cmd == nil) {
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if(chatty) fprint(2, "no conversion for bitmap \"%s\"...\n", g->name);
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if(g->buf == nil){ /* not stdin */
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fd = open(g->name, OREAD);
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if(fd < 0) {
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fprint(2, "cannot open file: %r\n");
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wexits("open");
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}
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}else
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fd = stdinpipe(g->buf, g->nbuf);
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} else {
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cmd = c.cmd;
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if(truecolor && c.truecmd)
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cmd = c.truecmd;
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if(g->buf != nil) /* is stdin */
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name = "";
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else
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name = g->name;
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if(strlen(cmd)+strlen(name) > sizeof buf) {
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fprint(2, "command too long\n");
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wexits("convert");
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}
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snprint(buf, sizeof buf, cmd, name);
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if(chatty) fprint(2, "using \"%s\" to convert \"%s\"...\n", buf, g->name);
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fd = spawnrc(buf, g->buf, g->nbuf);
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rcspawned++;
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if(fd < 0) {
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fprint(2, "cannot spawn converter: %r\n");
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wexits("convert");
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}
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}
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im = readimage(display, fd, 0);
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if(im == nil) {
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fprint(2, "warning: couldn't read image: %r\n");
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}
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close(fd);
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/* for some reason rx doesn't work well with wait */
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/* for some reason 3to1 exits on success with a non-null status of |3to1 */
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if(rcspawned && g->type != Iccittg4) {
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if((w=wait())!=nil && w->msg[0] && !strstr(w->msg, "3to1"))
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fprint(2, "slave wait error: %s\n", w->msg);
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free(w);
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}
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return im;
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}
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static int
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spawnrc(char *cmd, uchar *stdinbuf, int nstdinbuf)
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{
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int pfd[2];
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int pid;
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if(chatty) fprint(2, "spawning(%s)...", cmd);
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if(pipe(pfd) < 0)
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return -1;
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if((pid = fork()) < 0)
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return -1;
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if(pid == 0) {
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close(pfd[1]);
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if(stdinbuf)
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dup(stdinpipe(stdinbuf, nstdinbuf), 0);
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else
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dup(open("/dev/null", OREAD), 0);
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dup(pfd[0], 1);
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//dup(pfd[0], 2);
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execl("/bin/rc", "rc", "-c", cmd, nil);
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wexits("exec");
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}
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close(pfd[0]);
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return pfd[1];
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}
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