sys/src/cmd/mothra/getpix.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <draw.h>
   4 #include <event.h>
   5 #include <panel.h>
   6 #include "mothra.h"
   7
   8 typedef struct Pix Pix;
   9 struct Pix{
  10         Pix *next;
  11         Image *b;
  12         int width;
  13         int height;
  14         char name[NNAME];
  15 };
  16
  17 char *pixcmd[]={
  18 [GIF]   "gif -9t",
  19 [JPEG]  "jpg -9t",
  20 [PNG]   "png -9t",
  21 [PIC]   "fb/3to1 /lib/fb/cmap/rgbv",
  22 [TIFF]  "/sys/lib/mothra/tiffcvt",
  23 [XBM]   "fb/xbm2pic",
  24 };
  25
  26 void storebitmap(Rtext *t, Image *b){
  27         t->b=b;
  28         free(t->text);
  29         t->text=0;
  30 }
  31
  32 void getimage(Rtext *t, Www *w){
  33         int pfd[2];
  34         Action *ap;
  35         Url url;
  36         Image *b;
  37         int fd;
  38         char err[512];
  39         Pix *p;
  40
  41         ap=t->user;
  42         crackurl(&url, ap->image, w->base);
  43         for(p=w->pix;p!=nil; p=p->next)
  44                 if(strcmp(ap->image, p->name)==0 && ap->width==p->width && ap->height==p->height){
  45                         storebitmap(t, p->b);
  46                         free(ap->image);
  47                         ap->image=0;
  48                         w->changed=1;
  49                         return;
  50                 }
  51         fd=urlopen(&url, GET, 0);
  52         if(fd==-1){
  53         Err:
  54                 snprint(err, sizeof(err), "[%s: %r]", url.fullname);
  55                 free(t->text);
  56                 t->text=strdup(err);
  57                 free(ap->image);
  58                 ap->image=0;
  59                 w->changed=1;
  60                 close(fd);
  61                 return;
  62         }
  63         if(url.type!=GIF
  64         && url.type!=JPEG
  65         && url.type!=PNG
  66         && url.type!=PIC
  67         && url.type!=TIFF
  68         && url.type!=XBM){
  69                 werrstr("unknown image type");
  70                 goto Err;
  71         }
  72
  73         if((fd = pipeline(pixcmd[url.type], fd)) < 0)
  74                 goto Err;
  75         if(ap->width>0 || ap->height>0){
  76                 char buf[80];
  77                 char *p;
  78
  79                 p = buf;
  80                 p += sprint(p, "resize");
  81                 if(ap->width>0)
  82                         p += sprint(p, " -x %d", ap->width);
  83                 if(ap->height>0)
  84                         p += sprint(p, " -y %d", ap->height);
  85                 if((fd = pipeline(buf, fd)) < 0)
  86                         goto Err;
  87         }
  88         b=readimage(display, fd, 1);
  89         if(b==0){
  90                 werrstr("can't read image");
  91                 goto Err;
  92         }
  93         close(fd);
  94         p = emallocz(sizeof(Pix), 1);
  95         strncpy(p->name, ap->image, sizeof(p->name));
  96         p->b=b;
  97         p->width=ap->width;
  98         p->height=ap->height;
  99         p->next=w->pix;
 100         w->pix=p;
 101         storebitmap(t, b);
 102         free(ap->image);
 103         ap->image=0;
 104         w->changed=1;
 105 }
 106
 107 void getpix(Rtext *t, Www *w){
 108         Action *ap;
 109
 110         for(;t!=0;t=t->next){
 111                 ap=t->user;
 112                 if(ap && ap->image)
 113                         getimage(t, w);
 114         }
 115 }
 116
 117 void freepix(void *p)
 118 {
 119         Pix *x, *xx;
 120         xx = p;
 121         while(x = xx){
 122                 xx = x->next;
 123                 freeimage(x->b);
 124                 free(x);
 125         }
 126 }