#include "clipm_priv_checks.h"
#include "clipm_priv_error.h"
#include "clipm_priv_math.h"

#define	_POSIX_C_SOURCE 200112L

#define	max(a, b) ((a) > (b) ? (a) : (b))

#define	min(a, b) ((a) < (b) ? (a) : (b))

int	clipm_priv_checks_is_window_full_image (const cpl_size window_xxyy[4], const cpl_image *image)
	Check if window coordinates represent the whole image. More...

cpl_error_code	clipm_priv_checks_window_image (const cpl_size window_xxyy[4], const cpl_image image, int allow_window_NULL, cpl_size img_size_xy, cpl_size window_size_xy, cpl_size buffer_start_xy)
	Check window coordinates with the corresponding image. More...

cpl_error_code	clipm_priv_checks_window_minmax (const int window_xxyy[4], int ndims, int allow_window_NULL)
	Check coordinates for min/max condition. More...

cpl_error_code	clipm_priv_checks_window_guarantee (cpl_size window_xxyy[4], cpl_size xsize, cpl_size ysize, cpl_size min_windowsize)
	Cut window coordinates to a FITS image range if outside, expand if necessary. More...

cpl_error_code	clipm_priv_checks_window_guarantee_image (cpl_size window_xxyy[4], const cpl_image *image, cpl_size min_windowsize)
	Cut window coordinates to a FITS image range if outside, expand if necessary. More...

cpl_error_code	clipm_priv_checks_window_guarantee_window (cpl_size window_xxyy[4], const cpl_size *ref_window, cpl_size min_windowsize)
	Cut window coordinates to an existing reference window range, expand if necessary. More...

cpl_error_code	clipm_priv_checks_images_match (const cpl_image img1, const cpl_image img2, cpl_type type, cpl_size xsize, cpl_size *ysize)
	Check whether two images match in the requested features. More...

cpl_error_code	clipm_priv_checks_imtype_any (const cpl_image image, cpl_type out_type)
	Check whether an image is of an allowed type. More...

cpl_error_code	clipm_priv_checks_imtype_float (const cpl_image image, cpl_type out_type)
	Check whether an image is of a floating-point type. More...

Macro Definition Documentation

#define _POSIX_C_SOURCE 200112L

#define max	(	a,
		b
	)	((a) > (b) ? (a) : (b))

#define min	(	a,
		b
	)	((a) < (b) ? (a) : (b))

Function Documentation

cpl_error_code clipm_priv_checks_images_match	(	const cpl_image *	img1,
		const cpl_image *	img2,
		cpl_type *	type,
		cpl_size *	xsize,
		cpl_size *	ysize
	)

Check whether two images match in the requested features.

Parameters

img1	Image 1
img2	Image 2
type	(output) CPL type, can be NULL
xsize	(output) Horizontal size, can be NULL
ysize	(output) Vertical size, can be NULL

Returns: CPL error code

Error Handling:

The following error codes can be set:

CPL_ERROR_NULL_INPUT: img1 or img2 is NULL
CPL_ERROR_TYPE_MISMATCH: type != NULL and img1 and img2 don't have the same type
CPL_ERROR_INCOMPATIBLE_INPUT:
- xsize != NULL and img1 and img2 differ in their horizontal size, or
- ysize != NULL and img1 and img2 differ in their vertical size

cpl_error_code clipm_priv_checks_imtype_any	(	const cpl_image *	image,
		cpl_type *	out_type
	)

Check whether an image is of an allowed type.

Parameters

image	Input image
out_type	(Optional output) image type

Returns: CPL error code

Error Handling:

The following error codes can be returned:

CPL_ERROR_NULL_INPUT: image is NULL
CPL_ERROR_INVALID_TYPE: image is neither of type CPL_TYPE_INT, CPL_TYPE_FLOAT, nor CPL_TYPE_DOUBLE

cpl_error_code clipm_priv_checks_imtype_float	(	const cpl_image *	image,
		cpl_type *	out_type
	)

Check whether an image is of a floating-point type.

Parameters

image	Input image
out_type	(Optional output) image type

Returns: CPL error code

Error Handling:

The following error codes can be returned:

CPL_ERROR_NULL_INPUT: image is NULL
CPL_ERROR_INVALID_TYPE: image is neither of type CPL_TYPE_FLOAT nor CPL_TYPE_DOUBLE

int clipm_priv_checks_is_window_full_image	(	const cpl_size	window_xxyy[4],
		const cpl_image *	image
	)

Check if window coordinates represent the whole image.

Parameters

window_xxyy	Coordinate buffer of the form {x1a, x1b, y1a, y1b}, minimum/maximum order is irrelevant
image	Image (FITS convention)

Returns: CPL error code

Principle:: If window_xxyy is != NULL and the coordinates in window_xxyy represent exactly the whole image plane, then 1 is returned. Otherwise 0 is returned.

Error Handling:

The following codes are set, if the check fails:

CPL_ERROR_NULL_INPUT: image is NULL

No error is set if window_xxyy is NULL or if the coordinates in window_xxyy are outside the image range.

cpl_error_code clipm_priv_checks_window_guarantee	(	cpl_size	window_xxyy[4],
		cpl_size	xsize,
		cpl_size	ysize,
		cpl_size	min_windowsize
	)

Cut window coordinates to a FITS image range if outside, expand if necessary.

Parameters

window_xxyy	Coordinate buffer of the form {x1a, x1b, y1a, y1b} in FITS convention, minimum/maximum order is irrelevant
xsize	Horizontal image size
ysize	Vertical image size
min_windowsize	Minimum window size

Returns: CPL error code

Principle:

This function cuts window coordinates so that they fit into a FITS image range:

The window entries are ordered to {x_min, y_min, x_max, y_max}.
If window is already smaller than min_windowsize, then it is expanded in the respective dimension.
If window exceeds the FITS image range, it is cut.
If, by the cutting, window gets smaller than min_windowsize in x or y, it is expanded into the opposite direction. This is to ensure a minimum window size for certain purposes, e.g. like gaussian fitting etc.

Error Handling:

The following error codes can be set and returned:

CPL_ERROR_NULL_INPUT: window is NULL
CPL_ERROR_ACCESS_OUT_OF_RANGE: min_windowsize > xsize or ysize
CPL_ERROR_ILLEGAL_INPUT: min_windowsize < 1

In the case of error, window is not modified.

cpl_error_code clipm_priv_checks_window_guarantee_image	(	cpl_size	window_xxyy[4],
		const cpl_image *	image,
		cpl_size	min_windowsize
	)

Cut window coordinates to a FITS image range if outside, expand if necessary.

Parameters

window_xxyy	Coordinate buffer of the form {x1a, x1b, y1a, y1b} in FITS convention, minimum/maximum order is irrelevant
image	The reference image
min_windowsize	Minimum window size

Returns: CPL error code

See Also: For the complete documentation, please refer to clipm_priv_checks_window_guarantee(). If image is NULL, then also CPL_ERROR_NULL_INPUT is set and returned.

cpl_error_code clipm_priv_checks_window_guarantee_window	(	cpl_size	window_xxyy[4],
		const cpl_size *	ref_window,
		cpl_size	min_windowsize
	)

Cut window coordinates to an existing reference window range, expand if necessary.

Parameters

window_xxyy	Coordinate buffer of the form {x1a, x1b, y1a, y1b} in FITS convention, minimum/maximum order is irrelevant
ref_window	Coordinate buffer of the form {x1a, x1b, y1a, y1b} in FITS convention, minimum/maximum order is irrelevant
min_windowsize	Minimum window size

Returns: CPL error code

See Also: For the complete documentation, please refer to clipm_priv_checks_window_guarantee(). If image is NULL, then also CPL_ERROR_NULL_INPUT is set and returned.

cpl_error_code clipm_priv_checks_window_image	(	const cpl_size	window_xxyy[4],
		const cpl_image *	image,
		int	allow_window_NULL,
		cpl_size *	img_size_xy,
		cpl_size *	window_size_xy,
		cpl_size *	buffer_start_xy
	)

Check window coordinates with the corresponding image.

Parameters

window_xxyy	Coordinate buffer of the form {x1a, x1b, y1a, y1b}, minimum/maximum order is irrelevant
image	Image (FITS convention)
allow_window_NULL	If !0, then no error is set if (window==NULL)
img_size_xy	Buffer of size 2, to which the image size [x, y] is put out, can be NULL
window_size_xy	Buffer of size 2, to which the window size is determined and written, can be NULL
buffer_start_xy	Buffer of size 2, to which the lower left window indices are written, starting at 0 (not FITS), can be NULL

Returns: CPL error code

Overview:

The window coordinates are checked for being inside the image range.
If an input is NULL, or if the coordinates are out of range, then the appropriate CPL error is set and returned.
If out_window_size != NULL, then the window size is calculated and written to this buffer. If window_xxyy == NULL, then out_window_size is set to the image size!

Error Handling:

The following codes are set, if the check fails:

CPL_ERROR_NULL_INPUT: image and/or window_xxyy is NULL
CPL_ERROR_ACCESS_OUT_OF_RANGE: window coordinates are outside the image In the case of error, the output parameter values are undefined.

Note

This function does not check min/max conditions. Use clipm_priv_checks_window_minmax() for this purpose.
Specifying buffers of too small size (sizeof(window) < 4 || sizeof(out_img_size) < 2 || sizeof(out_window_size) < 2 || sizeof(out_buffer_start_xy) < 2) will crash the application!

cpl_error_code clipm_priv_checks_window_minmax	(	const int	window_xxyy[4],
		int	ndims,
		int	allow_window_NULL
	)

Check coordinates for min/max condition.

Parameters

window_xxyy	Coordinate buffer containing [xmin, xmax, ymin, ymax, zmin, zmax,...], its size must be 2*ndims
ndims	Number of dimensions
allow_window_NULL	If > 0, then no error is set if (window==NULL)

Returns: CPL error code

Overview:: The min coordinates are checked for being <= the max coordinates. If they violate this, then CPL_ERROR_ACCESS_OUT_OF_RANGE is set and returned.

Error Handling:

The following codes are set, if the check fails:

CPL_ERROR_NULL_INPUT: image is NULL

Note: Specifying a buffer of too small size (sizeof(window) < 4) will crash the application!