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#ifndef SOURCE_LOOKUP
#define SOURCE_LOOKUP(x) (x)
#define SOURCE_LOOKUP_AUTO
#endif
#ifndef SOURCE_TYPE
#define SOURCE_TYPE u16
#define SOURCE_TYPE_AUTO
#endif
#if 0
#define HVX_DEBUG(x...) direct_log_printf( NULL, x )
#else
#define HVX_DEBUG(x...) do {} while (0)
#endif
/*** OPTIMIZE by doing two pixels at once (vertically) with a 32 bit line buffer ***/
/*static void STRETCH_HVX_NV16( void *dst,
int dpitch,
const void *src,
int spitch,
int width,
int height,
int dst_width,
int dst_height,
DFBRegion *clip )*/
{
long x, y = 0;
long cw = clip->x2 - clip->x1 + 1;
long ch = clip->y2 - clip->y1 + 1;
long hfraq = ((long)(width - MINUS_1) << 18) / (long)(dst_width);
long vfraq = ((long)(height - MINUS_1) << 18) / (long)(dst_height);
long point0 = POINT_0 + clip->x1 * hfraq;
long point = point0;
long line = LINE_0 + clip->y1 * vfraq;
long ratios[cw];
u16 *dst16;
u16 _lbT[cw+16];
u16 _lbB[cw+16];
u16 *lbX;
u16 *lbT = (u16*)((((ulong)(&_lbT[0])) + 31) & ~31);
u16 *lbB = (u16*)((((ulong)(&_lbB[0])) + 31) & ~31);
long lineT = -2000;
for (x=0; x<cw; x++) {
ratios[x] = POINT_TO_RATIO( point, hfraq );
point += hfraq;
}
dst += clip->x1 * 2 + clip->y1 * dpitch;
dst16 = dst;
/*
* Scale line by line.
*/
for (y=0; y<ch; y++) {
long nlT = LINE_T( line, vfraq );
D_ASSERT( nlT >= 0 );
D_ASSERT( nlT < height-1 );
/*
* Fill line buffer(s) ?
*/
if (nlT != lineT) {
u16 L, R;
const SOURCE_TYPE *srcT = src + spitch * nlT;
const SOURCE_TYPE *srcB = src + spitch * (nlT + 1);
long diff = nlT - lineT;
if (diff > 1) {
/*
* Horizontal interpolation
*/
for (x=0, point=point0; x<cw; x++, point += hfraq) {
long pl = POINT_L( point, hfraq );
HVX_DEBUG("%ld,%ld %lu (%lu/%lu) 0x%x 0x%x\n", x, y, pl,
POINT_L( point, hfraq ), POINT_R( point, hfraq ), point, ratios[r] );
D_ASSERT( pl >= 0 );
D_ASSERT( pl < width-1 );
L = SOURCE_LOOKUP(srcT[pl]);
R = SOURCE_LOOKUP(srcT[pl+1]);
lbT[x] = (((((R & 0x00ff)-(L & 0x00ff))*ratios[x] + ((L & 0x00ff)<<8)) & 0x00ff00) +
((((R & 0xff00)-(L & 0xff00))*ratios[x] + ((L & 0xff00)<<8)) & 0xff0000)) >> 8;
L = SOURCE_LOOKUP(srcB[pl]);
R = SOURCE_LOOKUP(srcB[pl+1]);
lbB[x] = (((((R & 0x00ff)-(L & 0x00ff))*ratios[x] + ((L & 0x00ff)<<8)) & 0x00ff00) +
((((R & 0xff00)-(L & 0xff00))*ratios[x] + ((L & 0xff00)<<8)) & 0xff0000)) >> 8;
}
}
else {
/* Swap */
lbX = lbT;
lbT = lbB;
lbB = lbX;
/*
* Horizontal interpolation
*/
for (x=0, point=point0; x<cw; x++, point += hfraq) {
long pl = POINT_L( point, hfraq );
HVX_DEBUG("%ld,%ld %lu (%lu/%lu) 0x%x 0x%x\n", x, y, pl,
POINT_L( point, hfraq ), POINT_R( point, hfraq ), point, ratios[r] );
D_ASSERT( pl >= 0 );
D_ASSERT( pl < width-1 );
L = SOURCE_LOOKUP(srcB[pl]);
R = SOURCE_LOOKUP(srcB[pl+1]);
lbB[x] = (((((R & 0x00ff)-(L & 0x00ff))*ratios[x] + ((L & 0x00ff)<<8)) & 0x00ff00) +
((((R & 0xff00)-(L & 0xff00))*ratios[x] + ((L & 0xff00)<<8)) & 0xff0000)) >> 8;
}
}
lineT = nlT;
}
/*
* Vertical interpolation
*/
long X = LINE_TO_RATIO( line, vfraq );
for (x=0; x<cw; x++)
dst16[x] = (((((lbB[x] & 0x00ff)-(lbT[x] & 0x00ff))*X + ((lbT[x] & 0x00ff)<<8)) & 0x00ff00) +
((((lbB[x] & 0xff00)-(lbT[x] & 0xff00))*X + ((lbT[x] & 0xff00)<<8)) & 0xff0000)) >> 8;
dst16 += dpitch / 2;
line += vfraq;
}
}
#ifdef SOURCE_LOOKUP_AUTO
#undef SOURCE_LOOKUP_AUTO
#undef SOURCE_LOOKUP
#endif
#ifdef SOURCE_TYPE_AUTO
#undef SOURCE_TYPE_AUTO
#undef SOURCE_TYPE
#endif
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