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- /*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- Image*
- allocimagemix(Display *d, uint32_t color1, uint32_t color3)
- {
- Image *t, *b;
- static Image *qmask;
- if(qmask == nil)
- qmask = allocimage(d, Rect(0,0,1,1), GREY8, 1, 0x3F3F3FFF);
- if(d->screenimage->depth <= 8){ /* create a 2×2 texture */
- t = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 0, color1);
- if(t == nil)
- return nil;
- b = allocimage(d, Rect(0,0,2,2), d->screenimage->chan, 1, color3);
- if(b == nil){
- freeimage(t);
- return nil;
- }
- draw(b, Rect(0,0,1,1), t, nil, ZP);
- freeimage(t);
- return b;
- }else{ /* use a solid color, blended using alpha */
- t = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 1, color1);
- if(t == nil)
- return nil;
- b = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 1, color3);
- if(b == nil){
- freeimage(t);
- return nil;
- }
- draw(b, b->r, t, qmask, ZP);
- freeimage(t);
- return b;
- }
- }
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