1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <memdraw.h>
5 #include <bio.h>
6 #include "imagefile.h"
7 
8 /* Separate colors, if not a grey scale or bitmap, into one byte per color per pixel, no alpha or X */
9 /* Result is GREY[1248] or RGB24 */
10 
11 int drawlog2[] = {
12 	0, 0, 1, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0,
13 	4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
14 	5
15 };
16 
17 static
18 int
19 notrans(ulong chan)
20 {
21 	switch(chan){
22 	case GREY1:
23 	case GREY2:
24 	case GREY4:
25 	case GREY8:
26 	case RGB24:
27 		return 1;
28 	}
29 	return 0;
30 }
31 
32 Image*
33 multichan(Image *i)
34 {
35 	Image *ni;
36 
37 	if(notrans(i->chan))
38 		return i;
39 
40 	ni = allocimage(display, i->r, RGB24, 0, DNofill);
41 	if(ni == nil)
42 		return ni;
43 	draw(ni, ni->r, i, nil, i->r.min);
44 	return ni;
45 }
46 
47 Memimage*
48 memmultichan(Memimage *i)
49 {
50 	Memimage *ni;
51 
52 	if(notrans(i->chan))
53 		return i;
54 
55 	ni = allocmemimage(i->r, RGB24);
56 	if(ni == nil)
57 		return ni;
58 	memimagedraw(ni, ni->r, i, i->r.min, nil, i->r.min, S);
59 	return ni;
60 }