Premultiply background RGB values if alpha is used
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parent
d06bf1fd7e
commit
ffcacfa98d
12
x.c
12
x.c
@ -784,9 +784,15 @@ xloadcols(void)
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/* set alpha value of bg color */
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if (opt_alpha)
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alpha = strtof(opt_alpha, NULL);
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dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
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dc.col[defaultbg].pixel &= 0x00FFFFFF;
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dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
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dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
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dc.col[defaultbg].color.red =
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((unsigned short)(dc.col[defaultbg].color.red * alpha)) & 0xff00;
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dc.col[defaultbg].color.green =
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((unsigned short)(dc.col[defaultbg].color.green * alpha)) & 0xff00;
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dc.col[defaultbg].color.blue =
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((unsigned short)(dc.col[defaultbg].color.blue * alpha)) & 0xff00;
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dc.col[defaultbg].pixel &= 0x00FFFFFF;
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dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
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loaded = 1;
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}
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