DD::Image::DownRez Class Reference

Inherits DD::Image::Iop.

List of all members.

Public Member Functions
void	_validate (bool)
void	_request (int x, int y, int r, int t, ChannelMask, int count)
void	engine (int y, int x, int r, ChannelMask, Row &)
	DownRez (Node *node=0)
int	factor () const
void	factor (int v)
void	factor (int v, int w)
int	factor_x () const
void	factor_x (int v)
int	factor_y () const
void	factor_y (int v)
const char *	Class () const
const char *	node_help () const

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Detailed Description

Scale down the image by an integer factor, using a box filter Much faster and very predictable results so this can be used by the fast blur.

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Member Function Documentation

void DownRez::_validate

(

bool

for_real

)

[virtual]

Reimplemented from DD::Image::Iop.

References DD::Image::Iop::copy_info(), DD::Image::Mask_All, DD::Image::Iop::set_out_channels(), and DD::Image::Op::slowness().

void DownRez::_request	(	int	x,
		int	y,
		int	r,
		int	t,
		ChannelMask	c,
		int	count
	)			[virtual]

Requests the enlarged area.

Reimplemented from DD::Image::Iop.

References DD::Image::Iop::input0(), and DD::Image::Iop::request().

void DownRez::engine	(	int	y,
		int	x,
		int	r,
		ChannelMask	channels,
		Row &	row
	)			[virtual]

Because get() does the work of padding the request with any outside area our engine does not have to worry about the picture edges, making it much simpler.

Implements DD::Image::Iop.

References DD::Image::Row::erase(), DD::Image::Iop::get(), DD::Image::Iop::input0(), DD::Image::Row::is_zero(), MAX(), MIN(), and DD::Image::Row::writable().