507 lines
8.6 KiB
C
507 lines
8.6 KiB
C
#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <draw.h>
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#include <event.h>
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#include <cursor.h>
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typedef struct Icon Icon;
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struct Icon
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{
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Icon *next;
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uchar w; /* icon width */
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uchar h; /* icon height */
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ushort ncolor; /* number of colors */
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ushort nplane; /* number of bit planes */
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ushort bits; /* bits per pixel */
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ulong len; /* length of data */
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ulong offset; /* file offset to data */
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Image *img;
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Image *mask;
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Rectangle r; /* relative */
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Rectangle sr; /* abs */
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};
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typedef struct Header Header;
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struct Header
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{
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uint n;
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Icon *first;
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Icon *last;
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};
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int debug;
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Mouse mouse;
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Header h;
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Image *background;
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ushort
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gets(uchar *p)
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{
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return p[0] | (p[1]<<8);
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}
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ulong
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getl(uchar *p)
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{
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return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24);
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}
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int
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Bgetheader(Biobuf *b, Header *h)
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{
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Icon *icon;
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int i;
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uchar buf[40];
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memset(h, 0, sizeof(*h));
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if(Bread(b, buf, 6) != 6)
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goto eof;
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if(gets(&buf[0]) != 0)
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goto header;
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if(gets(&buf[2]) != 1)
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goto header;
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h->n = gets(&buf[4]);
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for(i = 0; i < h->n; i++){
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icon = mallocz(sizeof(*icon), 1);
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if(icon == nil)
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sysfatal("malloc: %r");
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if(Bread(b, buf, 16) != 16)
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goto eof;
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icon->w = buf[0];
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icon->h = buf[1];
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icon->ncolor = buf[2] == 0 ? 256 : buf[2];
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if(buf[3] != 0)
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goto header;
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icon->nplane = gets(&buf[4]);
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icon->bits = gets(&buf[6]);
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icon->len = getl(&buf[8]);
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icon->offset = getl(&buf[12]);
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if(i == 0)
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h->first = icon;
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else
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h->last->next = icon;
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h->last = icon;
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}
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return 0;
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eof:
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werrstr("unexpected EOF");
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return -1;
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header:
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werrstr("unknown header format");
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return -1;
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}
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uchar*
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transcmap(Icon *icon, uchar *map)
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{
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uchar *m, *p;
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int i;
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p = m = malloc(sizeof(int)*(1<<icon->bits));
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for(i = 0; i < icon->ncolor; i++){
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*p++ = rgb2cmap(map[2], map[1], map[0]);
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map += 4;
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}
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return m;
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}
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Image*
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xor2img(Icon *icon, uchar *xor, uchar *map)
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{
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uchar *data;
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Image *img;
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int inxlen;
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uchar *from, *to;
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int s, byte, mask;
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int x, y;
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inxlen = 4*((icon->bits*icon->w+31)/32);
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to = data = malloc(icon->w*icon->h);
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/* rotate around the y axis, go to 8 bits, and convert color */
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mask = (1<<icon->bits)-1;
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for(y = 0; y < icon->h; y++){
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s = -1;
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byte = 0;
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from = xor + (icon->h - 1 - y)*inxlen;
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for(x = 0; x < icon->w; x++){
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if(s < 0){
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byte = *from++;
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s = 8-icon->bits;
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}
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*to++ = map[(byte>>s) & mask];
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s -= icon->bits;
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}
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}
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/* stick in an image */
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img = allocimage(display, Rect(0,0,icon->w,icon->h), CMAP8, 0, DNofill);
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loadimage(img, Rect(0,0,icon->w,icon->h), data, icon->h*icon->w);
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free(data);
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return img;
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}
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Image*
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and2img(Icon *icon, uchar *and)
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{
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uchar *data;
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Image *img;
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int inxlen;
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int outxlen;
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uchar *from, *to;
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int x, y;
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inxlen = 4*((icon->w+31)/32);
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to = data = malloc(inxlen*icon->h);
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/* rotate around the y axis and invert bits */
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outxlen = (icon->w+7)/8;
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for(y = 0; y < icon->h; y++){
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from = and + (icon->h - 1 - y)*inxlen;
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for(x = 0; x < outxlen; x++){
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*to++ = ~(*from++);
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}
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}
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/* stick in an image */
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img = allocimage(display, Rect(0,0,icon->w,icon->h), GREY1, 0, DNofill);
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loadimage(img, Rect(0,0,icon->w,icon->h), data, icon->h*outxlen);
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free(data);
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return img;
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}
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int
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Bgeticon(Biobuf *b, Icon *icon)
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{
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ulong l;
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ushort s;
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uchar *xor;
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uchar *and;
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uchar *cm;
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uchar *buf;
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uchar *map2map;
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Image *img;
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Bseek(b, icon->offset, 0);
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buf = malloc(icon->len);
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if(buf == nil)
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return -1;
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if(Bread(b, buf, icon->len) != icon->len){
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werrstr("unexpected EOF");
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return -1;
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}
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/* this header's info takes precedence over previous one */
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if(getl(buf) != 40){
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werrstr("bad icon header");
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return -1;
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}
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l = getl(buf+4);
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if(l != icon->w)
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icon->w = l;
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l = getl(buf+8);
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if(l>>1 != icon->h)
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icon->h = l>>1;
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s = gets(buf+12);
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if(s != icon->nplane)
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icon->nplane = s;
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s = gets(buf+14);
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if(s != icon->bits)
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icon->bits = s;
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/* limit what we handle */
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switch(icon->bits){
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case 1:
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case 2:
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case 4:
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case 8:
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break;
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default:
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werrstr("don't support %d bit pixels", icon->bits);
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return -1;
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}
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if(icon->nplane != 1){
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werrstr("don't support %d planes", icon->nplane);
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return -1;
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}
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cm = buf + 40;
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xor = cm + 4*icon->ncolor;
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and = xor + icon->h*4*((icon->bits*icon->w+31)/32);
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/* translate the color map to a plan 9 one */
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map2map = transcmap(icon, cm);
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/* convert the images */
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icon->img = xor2img(icon, xor, map2map);
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icon->mask = and2img(icon, and);
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/* so that we save an image with a white background */
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img = allocimage(display, icon->img->r, CMAP8, 0, DWhite);
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draw(img, icon->img->r, icon->img, icon->mask, ZP);
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icon->img = img;
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free(buf);
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free(map2map);
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return 0;
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}
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void
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usage(void)
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{
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fprint(2, "usage: %s -W winsize [file]\n", argv0);
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exits("usage");
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}
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enum
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{
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Mimage,
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Mmask,
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Mexit,
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Up= 1,
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Down= 0
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};
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char *menu3str[] = {
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"write image",
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"write mask",
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"exit",
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0
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};
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Menu menu3 = {
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menu3str
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};
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Cursor sight = {
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{-7, -7},
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{0x1F, 0xF8, 0x3F, 0xFC, 0x7F, 0xFE, 0xFB, 0xDF,
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0xF3, 0xCF, 0xE3, 0xC7, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xE3, 0xC7, 0xF3, 0xCF,
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0x7B, 0xDF, 0x7F, 0xFE, 0x3F, 0xFC, 0x1F, 0xF8,},
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{0x00, 0x00, 0x0F, 0xF0, 0x31, 0x8C, 0x21, 0x84,
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0x41, 0x82, 0x41, 0x82, 0x41, 0x82, 0x7F, 0xFE,
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0x7F, 0xFE, 0x41, 0x82, 0x41, 0x82, 0x41, 0x82,
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0x21, 0x84, 0x31, 0x8C, 0x0F, 0xF0, 0x00, 0x00,}
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};
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void
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buttons(int ud)
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{
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while((mouse.buttons==0) != ud)
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mouse = emouse();
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}
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void
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mesg(char *fmt, ...)
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{
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va_list arg;
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char buf[1024];
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static char obuf[1024];
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va_start(arg, fmt);
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vseprint(buf, buf+sizeof(buf), fmt, arg);
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va_end(arg);
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string(screen, screen->r.min, background, ZP, font, obuf);
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string(screen, screen->r.min, display->white, ZP, font, buf);
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strcpy(obuf, buf);
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}
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void
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doimage(Icon *icon)
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{
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int rv;
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char file[256];
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int fd;
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rv = -1;
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snprint(file, sizeof(file), "%dx%d.img", icon->w, icon->h);
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fd = create(file, OWRITE, 0664);
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if(fd >= 0){
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rv = writeimage(fd, icon->img, 0);
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close(fd);
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}
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if(rv < 0)
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mesg("error writing %s: %r", file);
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else
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mesg("created %s", file);
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}
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void
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domask(Icon *icon)
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{
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int rv;
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char file[64];
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int fd;
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rv = -1;
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snprint(file, sizeof(file), "%dx%d.mask", icon->w, icon->h);
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fd = create(file, OWRITE, 0664);
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if(fd >= 0){
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rv = writeimage(fd, icon->mask, 0);
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close(fd);
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}
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if(rv < 0)
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mesg("error writing %s: %r", file);
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else
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mesg("created %s", file);
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}
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void
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apply(void (*f)(Icon*))
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{
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Icon *icon;
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esetcursor(&sight);
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buttons(Down);
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if(mouse.buttons == 4)
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for(icon = h.first; icon; icon = icon->next)
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if(ptinrect(mouse.xy, icon->sr)){
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buttons(Up);
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f(icon);
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break;
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}
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buttons(Up);
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esetcursor(0);
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}
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void
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menu(void)
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{
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int sel;
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sel = emenuhit(3, &mouse, &menu3);
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switch(sel){
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case Mimage:
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apply(doimage);
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break;
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case Mmask:
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apply(domask);
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break;
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case Mexit:
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exits(0);
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break;
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}
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}
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void
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mousemoved(void)
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{
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Icon *icon;
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for(icon = h.first; icon; icon = icon->next)
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if(ptinrect(mouse.xy, icon->sr)){
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mesg("%dx%d", icon->w, icon->h);
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return;
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}
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mesg("");
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}
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enum
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{
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BORDER= 1
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};
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void
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eresized(int new)
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{
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Icon *icon;
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Rectangle r;
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if(new && getwindow(display, Refnone) < 0)
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sysfatal("can't reattach to window");
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draw(screen, screen->clipr, background, nil, ZP);
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r.max.x = screen->r.min.x;
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r.min.y = screen->r.min.y + font->height + 2*BORDER;
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for(icon = h.first; icon != nil; icon = icon->next){
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r.min.x = r.max.x + BORDER;
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r.max.x = r.min.x + Dx(icon->img->r);
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r.max.y = r.min.y + Dy(icon->img->r);
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draw(screen, r, icon->img, nil, ZP);
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border(screen, r, -BORDER, display->black, ZP);
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icon->sr = r;
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}
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flushimage(display, 1);
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}
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void
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main(int argc, char **argv)
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{
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Biobuf in;
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Icon *icon;
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int fd;
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Rectangle r;
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Event e;
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ARGBEGIN{
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case 'W':
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winsize = EARGF(usage());
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break;
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case 'd':
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debug = 1;
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break;
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}ARGEND;
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fd = -1;
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switch(argc){
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case 0:
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fd = 0;
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break;
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case 1:
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fd = open(argv[0], OREAD);
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if(fd < 0)
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sysfatal("opening: %r");
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break;
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default:
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usage();
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break;
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}
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Binit(&in, fd, OREAD);
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if(Bgetheader(&in, &h) < 0)
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sysfatal("reading header: %r");
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initdraw(0, nil, "ico");
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background = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, 0x808080FF);
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einit(Emouse|Ekeyboard);
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r.min = Pt(4, 4);
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for(icon = h.first; icon != nil; icon = icon->next){
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if(Bgeticon(&in, icon) < 0){
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fprint(2, "bad rectangle: %r\n");
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continue;
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}
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if(debug)
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fprint(2, "w %ud h %ud ncolor %ud bits %ud len %lud offset %lud\n",
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icon->w, icon->h, icon->ncolor, icon->bits, icon->len, icon->offset);
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r.max = addpt(r.min, Pt(icon->w, icon->h));
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icon->r = r;
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r.min.x += r.max.x;
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}
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eresized(0);
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for(;;)
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switch(event(&e)){
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case Ekeyboard:
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break;
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case Emouse:
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mouse = e.mouse;
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if(mouse.buttons & 4)
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menu();
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else
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mousemoved();
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break;
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}
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}
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