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less bloated

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git-svn-id: https://gambatte.svn.sourceforge.net/svnroot/gambatte@132 9dfb2916-2d38-0410-aef4-c5fe6c9ffc24
This commit is contained in:
sinamas 2008-03-05 18:38:41 +00:00
parent 57dbb2e710
commit 6c37c96d0e
1 changed files with 10 additions and 23 deletions
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33
gambatte_qt/src/swscale.h
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@ -59,26 +59,19 @@ void linearScale(const T *src, T *dst, const unsigned inWidth, const unsigned in
unsigned long c13,c2;
};
Colorsum *const sums = new Colorsum[inWidth];
Colorsum *const sums = new Colorsum[inWidth + 1];
unsigned char *const hcoeffs = new unsigned char[outWidth - 1];
{
unsigned long hppos = outWidth + inWidth >> 1;
while (hppos < outWidth) {
hppos += inWidth;
}
hppos -= outWidth;
unsigned w = inWidth - 1;
unsigned w = inWidth;
unsigned char *coeff = hcoeffs;
do {
do {
while (hppos < outWidth) {
*coeff++ = (hppos << c13distance) / outWidth;
hppos += inWidth;
} while (hppos < outWidth);
}
hppos -= outWidth;
} while (--w);
@ -95,7 +88,7 @@ void linearScale(const T *src, T *dst, const unsigned inWidth, const unsigned in
{
const unsigned coeff = (vppos << c13distance) / outHeight;
const T *s = src;
Colorsum *sum = sums;
Colorsum *sum = sums + 1;
unsigned n = inWidth;
do {
@ -110,29 +103,23 @@ void linearScale(const T *src, T *dst, const unsigned inWidth, const unsigned in
++sum;
++s;
} while (--n);
sums[0] = sums[1];
}
{
const Colorsum *sum = sums;
unsigned long hppos = outWidth + inWidth >> 1;
while (hppos < outWidth) {
*dst++ = sum->c13 | sum->c2 >> c13distance & c2mask;
hppos += inWidth;
}
hppos -= outWidth;
const unsigned char *coeff = hcoeffs;
unsigned w = inWidth - 1;
unsigned w = inWidth;
do {
do {
while (hppos < outWidth) {
*dst++ = sum->c13 + (((sum+1)->c13 - sum->c13) * *coeff >> c13distance) & c13mask |
(sum->c2 << c13distance) + ((sum+1)->c2 - sum->c2) * *coeff >> c13distance * 2 & c2mask;
hppos += inWidth;
++coeff;
} while (hppos < outWidth);
}
hppos -= outWidth;
++sum;