void resetCropping(MapGenerator* pGenerator)
{
XnCropping crop;
crop.bEnabled = FALSE;
crop.nXOffset = crop.nYOffset = 0;
crop.nXSize = crop.nYSize = 0;
setStreamCropping(pGenerator, &crop);
}
void drawCropStream(MapGenerator* pGenerator, IntRect location, IntRect selection, int dividedBy)
{
if (!pGenerator->IsCapabilitySupported(XN_CAPABILITY_CROPPING))
{
return;
}
XnMapOutputMode Mode;
pGenerator->GetMapOutputMode(Mode);
// check if entire selection is in location
if (selection.uLeft >= location.uLeft &&
selection.uRight <= location.uRight &&
selection.uBottom >= location.uBottom &&
selection.uTop <= location.uTop)
{
IntRect cropRect;
cropRect.uBottom = Mode.nYRes * (selection.uBottom - location.uBottom) / (location.uTop - location.uBottom);
cropRect.uTop = Mode.nYRes * (selection.uTop - location.uBottom) / (location.uTop - location.uBottom);
cropRect.uLeft = Mode.nXRes * (selection.uLeft - location.uLeft) / (location.uRight - location.uLeft);
cropRect.uRight = Mode.nXRes * (selection.uRight - location.uLeft) / (location.uRight - location.uLeft);
XnCropping cropping;
cropping.bEnabled = TRUE;
cropping.nXOffset = cropRect.uLeft;
cropping.nYOffset = cropRect.uBottom;
cropping.nXSize = cropRect.uRight - cropRect.uLeft;
cropping.nYSize = cropRect.uTop - cropRect.uBottom;
if ((cropping.nXOffset % dividedBy) != 0)
cropping.nXOffset -= (cropping.nXOffset % dividedBy);
if ((cropping.nXSize % dividedBy) != 0)
cropping.nXSize += dividedBy - (cropping.nXSize % dividedBy);
setStreamCropping(pGenerator, &cropping);
}
}
void drawCropStream(openni::VideoStream& stream, IntRect location, IntRect selection, int dividedBy)
{
if (!stream.isCroppingSupported())
{
return;
}
openni::VideoMode Mode = stream.getVideoMode();
// check if entire selection is in location
if (selection.uLeft >= location.uLeft &&
selection.uRight <= location.uRight &&
selection.uBottom >= location.uBottom &&
selection.uTop <= location.uTop)
{
IntRect cropRect;
cropRect.uBottom = Mode.getResolutionY() * (selection.uBottom - location.uBottom) / (location.uTop - location.uBottom);
cropRect.uTop = Mode.getResolutionY() * (selection.uTop - location.uBottom) / (location.uTop - location.uBottom);
cropRect.uLeft = Mode.getResolutionX() * (selection.uLeft - location.uLeft) / (location.uRight - location.uLeft);
cropRect.uRight = Mode.getResolutionX() * (selection.uRight - location.uLeft) / (location.uRight - location.uLeft);
int originX, originY, width, height;
originX = cropRect.uLeft;
originY = cropRect.uBottom;
width = cropRect.uRight - cropRect.uLeft;
height = cropRect.uTop - cropRect.uBottom;
if ((originX % dividedBy) != 0)
originX -= (originX % dividedBy);
if ((width % dividedBy) != 0)
width += dividedBy - (width % dividedBy);
setStreamCropping(stream, originX, originY, width, height);
}
}
