53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <draw.h>
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Image*
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allocimagemix(Display *d, uint32_t color1, uint32_t color3)
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{
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Image *t, *b;
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static Image *qmask;
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if(qmask == nil)
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qmask = allocimage(d, Rect(0,0,1,1), GREY8, 1, 0x3F3F3FFF);
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if(d->screenimage->depth <= 8){ /* create a 2×2 texture */
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t = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 0, color1);
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if(t == nil)
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return nil;
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b = allocimage(d, Rect(0,0,2,2), d->screenimage->chan, 1, color3);
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if(b == nil){
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freeimage(t);
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return nil;
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}
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draw(b, Rect(0,0,1,1), t, nil, ZP);
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freeimage(t);
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return b;
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}else{ /* use a solid color, blended using alpha */
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t = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 1, color1);
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if(t == nil)
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return nil;
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b = allocimage(d, Rect(0,0,1,1), d->screenimage->chan, 1, color3);
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if(b == nil){
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freeimage(t);
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return nil;
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}
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draw(b, b->r, t, qmask, ZP);
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freeimage(t);
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return b;
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}
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}
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