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/*
* Copyright © 2000 SuSE, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of SuSE not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. SuSE makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Keith Packard, SuSE, Inc.
*/
#include "icint.h"
#ifdef ICINT_NEED_IC_ONES
/* Fall back on HACKMEM 169. */
int
_IcOnes (unsigned long mask)
{
register unsigned long y;
y = (mask >> 1) &033333333333;
y = mask - y - ((y >>1) & 033333333333);
return (((y + (y >> 3)) & 030707070707) % 077);
}
#endif
void
IcColorToPixel (const IcFormat *format,
const IcColor *color,
IcBits *pixel)
{
uint32_t r, g, b, a;
r = color->red >> (16 - _IcOnes (format->redMask));
g = color->green >> (16 - _IcOnes (format->greenMask));
b = color->blue >> (16 - _IcOnes (format->blueMask));
a = color->alpha >> (16 - _IcOnes (format->alphaMask));
r = r << format->red;
g = g << format->green;
b = b << format->blue;
a = a << format->alpha;
*pixel = r|g|b|a;
}
slim_hidden_def(IcColorToPixel);
static uint16_t
IcFillColor (uint32_t pixel, int bits)
{
while (bits < 16)
{
pixel |= pixel << bits;
bits <<= 1;
}
return (uint16_t) pixel;
}
void
IcPixelToColor (const IcFormat *format,
const IcBits pixel,
IcColor *color)
{
uint32_t r, g, b, a;
r = (pixel >> format->red) & format->redMask;
g = (pixel >> format->green) & format->greenMask;
b = (pixel >> format->blue) & format->blueMask;
a = (pixel >> format->alpha) & format->alphaMask;
color->red = IcFillColor (r, _IcOnes (format->redMask));
color->green = IcFillColor (r, _IcOnes (format->greenMask));
color->blue = IcFillColor (r, _IcOnes (format->blueMask));
color->alpha = IcFillColor (r, _IcOnes (format->alphaMask));
}
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