void dng_tile_iterator::Initialize (const dng_rect &tile,
const dng_rect &area)
{
fArea = area;
if (area.IsEmpty ())
{
fVerticalPage = 0;
fBottomPage = -1;
return;
}
int32 vOffset = tile.t;
int32 hOffset = tile.l;
int32 tileHeight = tile.b - vOffset;
int32 tileWidth = tile.r - hOffset;
fTileHeight = tileHeight;
fTileWidth = tileWidth;
fLeftPage = (fArea.l - hOffset ) / tileWidth;
fRightPage = (fArea.r - hOffset - 1) / tileWidth;
fHorizontalPage = fLeftPage;
fTopPage = (fArea.t - vOffset ) / tileHeight;
fBottomPage = (fArea.b - vOffset - 1) / tileHeight;
fVerticalPage = fTopPage;
fTileLeft = fHorizontalPage * tileWidth + hOffset;
fTileTop = fVerticalPage * tileHeight + vOffset;
fRowLeft = fTileLeft;
}
dng_image::dng_image (const dng_rect &bounds,
uint32 planes,
uint32 pixelType)
: fBounds (bounds)
, fPlanes (planes)
, fPixelType (pixelType)
{
if (bounds.IsEmpty () || planes == 0 || PixelSize () == 0)
{
#if qDNGValidate
ReportError ("Fuzz: Attempt to create zero size image");
#endif
ThrowBadFormat ();
}
}