void CloudIcon::makeAlphaIcon(const Graphics::Surface &icon, float alpha) {
_alphaIcon.copyFrom(icon);
byte *pixels = (byte *)_alphaIcon.getPixels();
for (int y = 0; y < _alphaIcon.h; y++) {
byte *row = pixels + y * _alphaIcon.pitch;
for (int x = 0; x < _alphaIcon.w; x++) {
uint32 srcColor;
if (_alphaIcon.format.bytesPerPixel == 2)
srcColor = READ_UINT16(row);
else if (_alphaIcon.format.bytesPerPixel == 3)
srcColor = READ_UINT24(row);
else
srcColor = READ_UINT32(row);
// Update color's alpha
byte r, g, b, a;
_alphaIcon.format.colorToARGB(srcColor, a, r, g, b);
a = (byte)(a * alpha);
uint32 color = _alphaIcon.format.ARGBToColor(a, r, g, b);
if (_alphaIcon.format.bytesPerPixel == 2)
*((uint16 *)row) = color;
else
*((uint32 *)row) = color;
row += _alphaIcon.format.bytesPerPixel;
}
}
}
int
sexp_iterator_get_uint32(struct sexp_iterator *iterator,
uint32_t *x)
{
if (iterator->type == SEXP_ATOM
&& !iterator->display
&& iterator->atom_length
&& iterator->atom[0] < 0x80)
{
size_t length = iterator->atom_length;
const uint8_t *p = iterator->atom;
/* Skip leading zeros. */
while(length && !*p)
{
length--;
p++;
}
switch(length)
{
case 0:
*x = 0;
break;
case 1:
*x = p[0];
break;
case 2:
*x = READ_UINT16(p);
break;
case 3:
*x = READ_UINT24(p);
break;
case 4:
*x = READ_UINT32(p);
break;
default:
return 0;
}
return sexp_iterator_next(iterator);
}
return 0;
}
