// pitch: width * pixel size
static void fcImageFlipY(void *image_, int width, int height, int pitch)
{
std::vector<char> buf_(pitch);
char *image = (char*)image_;
char *buf = &buf_[0];
for (int y = 0; y < height / 2; ++y) {
int iy = height - y - 1;
memcpy(buf, image + (pitch*y), pitch);
memcpy(image + (pitch*y), image + (pitch*iy), pitch);
memcpy(image + (pitch*iy), buf, pitch);
}
}
void fcImageFlipY(void *image_, int width, int height, fcPixelFormat fmt)
{
size_t pitch = width * fcGetPixelSize(fmt);
Buffer buf_((size_t)pitch);
char *image = (char*)image_;
char *buf = &buf_[0];
for (int y = 0; y < height / 2; ++y) {
int iy = height - y - 1;
memcpy(buf, image + (pitch*y), pitch);
memcpy(image + (pitch*y), image + (pitch*iy), pitch);
memcpy(image + (pitch*iy), buf, pitch);
}
}
void c4_FormatB::SetOne(int index_, const c4_Bytes &xbuf_, bool ignoreMemos_) {
// this fixes bug in 2.4.0 when copying string from higher row
// TODO: this fix is very conservative, figure out when to copy
// (can probably look at pointer to see whether it's from us)
int sz = xbuf_.Size();
c4_Bytes buf_(xbuf_.Contents(), sz, 0 < sz && sz <= c4_Column::kSegMax);
c4_Column *cp = &_data;
t4_i32 start = Offset(index_);
int len = Offset(index_ + 1) - start;
if (!ignoreMemos_ && _memos.GetAt(index_) != 0)
len = ItemLenOffCol(index_, start, cp);
int m = buf_.Size();
int n = m - len;
if (n > 0)
cp->Grow(start, n);
else if (n < 0)
cp->Shrink(start, - n);
else if (m == 0)
return ;
// no size change and no contents
_recalc = true;
cp->StoreBytes(start, buf_);
if (n && cp == &_data) {
// if size has changed
int k = _offsets.GetSize() - 1;
// if filling in an empty entry at end: extend offsets first
if (m > 0 && index_ >= k) {
_offsets.InsertAt(k, _offsets.GetAt(k), index_ - k + 1);
k = index_ + 1;
d4_assert(k == _offsets.GetSize() - 1);
}
// adjust following entry offsets
while (++index_ <= k)
_offsets.ElementAt(index_) += n;
}
d4_assert((t4_i32)_offsets.GetAt(_offsets.GetSize() - 1) == _data.ColSize());
}
void FHT::_transform(float* p, int n, int k) {
if (n == 8) {
transform8(p + k);
return;
}
int i, j, ndiv2 = n / 2;
float a, *t1, *t2, *t3, *t4, *ptab, *pp;
for (i = 0, t1 = buf_(), t2 = buf_() + ndiv2, pp = &p[k]; i < ndiv2; i++)
*t1++ = *pp++, *t2++ = *pp++;
std::copy(buf_(), buf_() + n, p + k);
_transform(p, ndiv2, k);
_transform(p, ndiv2, k + ndiv2);
j = num_ / ndiv2 - 1;
t1 = buf_();
t2 = t1 + ndiv2;
t3 = p + k + ndiv2;
ptab = tab_();
pp = p + k;
a = *ptab++ * *t3++;
a += *ptab * *pp;
ptab += j;
*t1++ = *pp + a;
*t2++ = *pp++ - a;
for (i = 1, t4 = p + k + n; i < ndiv2; i++, ptab += j) {
a = *ptab++ * *t3++;
a += *ptab * *--t4;
*t1++ = *pp + a;
*t2++ = *pp++ - a;
}
std::copy(buf_(), buf_() + n, p + k);
}
