vil1_resample_image_impl Class Reference

#include <vil1_resample_image_impl.h>

Inheritance diagram for vil1_resample_image_impl:

Detailed Description

Adaptor which produces an image by resampling.

Note that the actual subsampling only takes place at the moment when the get_section() method is called.

Definition at line 19 of file vil1_resample_image_impl.h.


Public Member Functions
	vil1_resample_image_impl (vil1_image const &underlying, unsigned nw, unsigned nh)
	~vil1_resample_image_impl ()
int	planes () const
	these inlines partly document the semantics of vil1_resample_image.
int	width () const
	Dimensions: Planes x W x H x Components.
int	height () const
	Dimensions: Planes x W x H x Components.
int	components () const
	Dimensions: Planes x W x H x Components.
int	bits_per_component () const
	Number of bits per component.
vil1_component_format	component_format () const
	Format.
vil1_image	get_plane (unsigned int p) const
	return the ith plane.
bool	get_section (void *buf, int x0, int y0, int w, int h) const
	Copy buffer of this to BUF.
bool	put_section (void const *buf, int x0, int y0, int w, int h)
	Copy plane PLANE of BUF to this.
bool	get_property (char const tag, void property_value_out=0) const
	Extra property information.
virtual vcl_string	is_a () const
	Return the name of the class.
virtual bool	is_class (vcl_string const &s) const
	Return true if the name of the class matches the argument.
virtual char const *	file_format () const
	Return a string describing the file format.
virtual bool	set_property (char const tag, void const property_value=0) const
Private Attributes
vil1_image	base
unsigned	new_width
unsigned	new_height

Constructor & Destructor Documentation

vil1_resample_image_impl::vil1_resample_image_impl	(	vil1_image const &	underlying,
		unsigned	nw,
		unsigned	nh
	)

Definition at line 18 of file vil1_resample_image_impl.cxx.

vil1_resample_image_impl::~vil1_resample_image_impl ( ) [inline]

Definition at line 23 of file vil1_resample_image_impl.h.

Member Function Documentation

int vil1_resample_image_impl::planes ( ) const [inline, virtual]

these inlines partly document the semantics of vil1_resample_image.

Implements vil1_image_impl.

Definition at line 26 of file vil1_resample_image_impl.h.

int vil1_resample_image_impl::width ( ) const [inline, virtual]

Dimensions: Planes x W x H x Components.

Implements vil1_image_impl.

Definition at line 27 of file vil1_resample_image_impl.h.

int vil1_resample_image_impl::height ( ) const [inline, virtual]

Dimensions: Planes x W x H x Components.

Implements vil1_image_impl.

Definition at line 28 of file vil1_resample_image_impl.h.

int vil1_resample_image_impl::components ( ) const [inline, virtual]

Dimensions: Planes x W x H x Components.

Implements vil1_image_impl.

Definition at line 29 of file vil1_resample_image_impl.h.

int vil1_resample_image_impl::bits_per_component ( ) const [inline, virtual]

Number of bits per component.

Size (in bits) for the smallest entity of the image.

Implements vil1_image_impl.

Definition at line 30 of file vil1_resample_image_impl.h.

vil1_component_format vil1_resample_image_impl::component_format ( ) const [inline, virtual]

Format.

A standard RGB RGB RGB image has

components() == 3
bits_per_component() == 8
component_format() == VIL1_COMPONENT_FORMAT_UNSIGNED_INT Use vil1_print(fmt) to return a string description of the format fmt.

Implements vil1_image_impl.

Definition at line 31 of file vil1_resample_image_impl.h.

vil1_image vil1_resample_image_impl::get_plane ( unsigned int p ) const [virtual]

return the ith plane.

Reimplemented from vil1_image_impl.

Definition at line 30 of file vil1_resample_image_impl.cxx.

bool vil1_resample_image_impl::get_section	(	void *	buf,
		int	x0,
		int	y0,
		int	w,
		int	h
	)			const `[virtual]`

Copy buffer of this to BUF.

The buffer is stored like this for each pixel: component0(plane0,plane1,plane2,...),component1(plane0,plane1,plane2,...),...
total size of BUF in bytes should be (bits_per_component * components + 7) / 8 i.e. rounding to the next multiple of 8 bits (only correct if 1 byte = 8 bits)

Implements vil1_image_impl.

Definition at line 48 of file vil1_resample_image_impl.cxx.

bool vil1_resample_image_impl::put_section	(	void const *	buf,
		int	x0,
		int	y0,
		int	w,
		int	h
	)			`[virtual]`

Copy plane PLANE of BUF to this.

The buffer should look like this for each pixel: component0(plane0,plane1,plane2,...),component1(plane0,plane1,plane2,...),...
total size of BUF in bytes should be (bits_per_component * components + 7) / 8 i.e. rounding to the next multiple of 8 bits (only correct if 1 byte = 8 bits)

Implements vil1_image_impl.

Definition at line 36 of file vil1_resample_image_impl.cxx.