Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <bio.h>
#include "imagefile.h"

/* Separate colors, if not a grey scale or bitmap, into one byte per color per pixel, no alpha or X */
/* Result is GREY[1248] or RGB24 */

static
int
notrans(ulong chan)
{
        switch(chan){
        case GREY1:
        case GREY2:
        case GREY4:
        case GREY8:
        case RGB24:
                return 1;
        }
        return 0;
}

Image*
multichan(Image *i)
{
        Image *ni;

        if(notrans(i->chan))
                return i;

        ni = allocimage(display, i->r, RGB24, 0, DNofill);
        if(ni == nil)
                return ni;
        draw(ni, ni->r, i, nil, i->r.min);
        return ni;
}

Memimage*
memmultichan(Memimage *i)
{
        Memimage *ni;

        if(notrans(i->chan))
                return i;

        ni = allocmemimage(i->r, RGB24);
        if(ni == nil)
                return ni;
        memimagedraw(ni, ni->r, i, i->r.min, nil, i->r.min, S);
        return ni;
}