bool
ImageBufAlgo::flip(ImageBuf &dst, const ImageBuf &src, ROI roi, int nthreads)
{
if (&dst == &src) { // Handle in-place operation
ImageBuf tmp;
tmp.swap (const_cast<ImageBuf&>(src));
return flip (dst, tmp, roi, nthreads);
}
pvt::LoggedTimer logtime("IBA::flip");
ROI src_roi = roi.defined() ? roi : src.roi();
ROI src_roi_full = src.roi_full();
int offset = src_roi.ybegin - src_roi_full.ybegin;
int start = src_roi_full.yend - offset - src_roi.height();
ROI dst_roi (src_roi.xbegin, src_roi.xend,
start, start+src_roi.height(),
src_roi.zbegin, src_roi.zend,
src_roi.chbegin, src_roi.chend);
ASSERT (dst_roi.width() == src_roi.width() &&
dst_roi.height() == src_roi.height());
// Compute the destination ROI, it's the source ROI reflected across
// the midline of the display window.
if (! IBAprep (dst_roi, &dst, &src))
return false;
bool ok;
OIIO_DISPATCH_COMMON_TYPES2 (ok, "flip", flip_,
dst.spec().format, src.spec().format,
dst, src, dst_roi, nthreads);
return ok;
}
bool
ImageBufAlgo::rotate180 (ImageBuf &dst, const ImageBuf &src,
ROI roi, int nthreads)
{
if (&dst == &src) { // Handle in-place operation
ImageBuf tmp;
tmp.swap (const_cast<ImageBuf&>(src));
return rotate180 (dst, tmp, roi, nthreads);
}
ROI src_roi = roi.defined() ? roi : src.roi();
ROI src_roi_full = src.roi_full();
int xoffset = src_roi.xbegin - src_roi_full.xbegin;
int xstart = src_roi_full.xend - xoffset - src_roi.width();
int yoffset = src_roi.ybegin - src_roi_full.ybegin;
int ystart = src_roi_full.yend - yoffset - src_roi.height();
ROI dst_roi (xstart, xstart+src_roi.width(),
ystart, ystart+src_roi.height(),
src_roi.zbegin, src_roi.zend,
src_roi.chbegin, src_roi.chend);
ASSERT (dst_roi.width() == src_roi.width() &&
dst_roi.height() == src_roi.height());
// Compute the destination ROI, it's the source ROI reflected across
// the midline of the display window.
IBAprep (dst_roi, &dst, &src);
bool ok;
OIIO_DISPATCH_TYPES2 (ok, "rotate180", rotate180_,
dst.spec().format, src.spec().format,
dst, src, dst_roi, nthreads);
return ok;
}
bool
ImageBufAlgo::rotate270 (ImageBuf &dst, const ImageBuf &src,
ROI roi, int nthreads)
{
if (&dst == &src) { // Handle in-place operation
ImageBuf tmp;
tmp.swap (const_cast<ImageBuf&>(src));
return rotate270 (dst, tmp, roi, nthreads);
}
pvt::LoggedTimer logtime("IBA::rotate270");
ROI src_roi = roi.defined() ? roi : src.roi();
ROI src_roi_full = src.roi_full();
// Rotated full ROI swaps width and height, and keeps its origin
// where the original origin was.
ROI dst_roi_full (src_roi_full.xbegin, src_roi_full.xbegin+src_roi_full.height(),
src_roi_full.ybegin, src_roi_full.ybegin+src_roi_full.width(),
src_roi_full.zbegin, src_roi_full.zend,
src_roi_full.chbegin, src_roi_full.chend);
ROI dst_roi (src_roi.ybegin, src_roi.yend,
src_roi_full.xend-src_roi.xend,
src_roi_full.xend-src_roi.xbegin,
src_roi.zbegin, src_roi.zend,
src_roi.chbegin, src_roi.chend);
ASSERT (dst_roi.width() == src_roi.height() &&
dst_roi.height() == src_roi.width());
bool dst_initialized = dst.initialized();
if (! IBAprep (dst_roi, &dst, &src))
return false;
if (! dst_initialized)
dst.set_roi_full (dst_roi_full);
bool ok;
OIIO_DISPATCH_COMMON_TYPES2 (ok, "rotate270", rotate270_,
dst.spec().format, src.spec().format,
dst, src, dst_roi, nthreads);
return ok;
}
