#if !defined( WINMAP_INCLUDED ) /* Include this file only once */
#define WINMAP_INCLUDED
/*
*+
* Name:
* winmap.h
* Type:
* C include file.
* Purpose:
* Define the interface to the WinMap class.
* Invocation:
* #include "winmap.h"
* Description:
* This include file defines the interface to the WinMap class and
* provides the type definitions, function prototypes and macros,
* etc. needed to use this class.
*
* The WinMap class implements Mappings which maps one window onto
* another window by scaling and shifting the values on each axis.
* Inheritance:
* The WinMap class inherits from the Mapping class.
* Attributes Over-Ridden:
* None.
* New Attributes Defined:
* None.
* Methods Over-Ridden:
* Public:
* None.
*
* Protected:
* ClearAttrib
* Clear an attribute value for a WinMap.
* GetAttrib
* Get an attribute value for a WinMap.
* SetAttrib
* Set an attribute value for a WinMap.
* TestAttrib
* Test if an attribute value has been set for a WinMap.
* astMapMerge
* Simplify a sequence of Mappings containing a WinMap.
* astTransform
* Apply a WinMap to transform a set of points.
* New Methods Defined:
* Public:
* None.
*
* Protected:
* astWinTerms
* Obtain copies of the shift and scale terms used by a WinMap.
* Other Class Functions:
* Public:
* astIsAWinMap
* Test class membership.
* astWinMap
* Create a WinMap.
*
* Protected:
* astCheckWinMap
* Validate class membership.
* astInitWinMap
* Initialise a WinMap.
* astInitWinMapVtab
* Initialise the virtual function table for the WinMap class.
* astLoadWinMap
* Load a WinMap.
* Macros:
* None.
* Type Definitions:
* Public:
* AstWinMap
* WinMap object type.
*
* Protected:
* AstWinMapVtab
* WinMap virtual function table type.
* Feature Test Macros:
* astCLASS
* If the astCLASS macro is undefined, only public symbols are
* made available, otherwise protected symbols (for use in other
* class implementations) are defined. This macro also affects
* the reporting of error context information, which is only
* provided for external calls to the AST library.
* Copyright:
* Copyright (C) 1997-2006 Council for the Central Laboratory of the
* Research Councils
* Licence:
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
* Authors:
* DSB: D.S. Berry (Starlink)
* History:
* 23-OCT-1996 (DSB):
* Original version.
* 8-JAN-2003 (DSB):
* Changed private InitVtab method to protected astInitWinMapVtab
* method.
*-
*/
/* Include files. */
/* ============== */
/* Interface definitions. */
/* ---------------------- */
#include "mapping.h" /* Coordinate mappings (parent class) */
#if defined(astCLASS) /* Protected */
#include "pointset.h" /* Sets of points/coordinates */
#include "channel.h" /* I/O channels */
#endif
/* C header files. */
/* --------------- */
#if defined(astCLASS) /* Protected */
#include <stddef.h>
#endif
/* Macros */
/* ====== */
/* Define a dummy __attribute__ macro for use on non-GNU compilers. */
#ifndef __GNUC__
# define __attribute__(x) /*NOTHING*/
#endif
/* Type Definitions. */
/* ================= */
/* WinMap structure. */
/* ------------------ */
/* This structure contains all information that is unique to each object in
the class (e.g. its instance variables). */
typedef struct AstWinMap {
/* Attributes inherited from the parent class. */
AstMapping mapping; /* Parent class structure */
/* Attributes specific to objects in this class. */
double *a; /* Pointer to array of shifts */
double *b; /* Pointer to array of scale factors */
} AstWinMap;
/* Virtual function table. */
/* ----------------------- */
/* This table contains all information that is the same for all
objects in the class (e.g. pointers to its virtual functions). */
#if defined(astCLASS) /* Protected */
typedef struct AstWinMapVtab {
/* Properties (e.g. methods) inherited from the parent class. */
AstMappingVtab mapping_vtab; /* Parent class virtual function table */
/* A Unique identifier to determine class membership. */
AstClassIdentifier id;
/* Properties (e.g. methods) specific to this class. */
int (* WinTerms)( AstWinMap *, double **, double **, int * );
} AstWinMapVtab;
#if defined(THREAD_SAFE)
/* Define a structure holding all data items that are global within the
object.c file. */
typedef struct AstWinMapGlobals {
AstWinMapVtab Class_Vtab;
int Class_Init;
} AstWinMapGlobals;
/* Thread-safe initialiser for all global data used by this module. */
void astInitWinMapGlobals_( AstWinMapGlobals * );
#endif
#endif
/* Function prototypes. */
/* ==================== */
/* Prototypes for standard class functions. */
/* ---------------------------------------- */
astPROTO_CHECK(WinMap) /* Check class membership */
astPROTO_ISA(WinMap) /* Test class membership */
/* Constructor. */
#if defined(astCLASS) /* Protected. */
AstWinMap *astWinMap_( int, const double [], const double [], const double [], const double [], const char *, int *, ...);
#else
AstWinMap *astWinMapId_( int, const double [], const double [], const double [], const double [], const char *, ... )__attribute__((format(printf,6,7)));
#endif
#if defined(astCLASS) /* Protected */
/* Initialiser. */
AstWinMap *astInitWinMap_( void *, size_t, int, AstWinMapVtab *,
const char *, int, const double *, const double *,
const double *, const double *, int * );
/* Vtab initialiser. */
void astInitWinMapVtab_( AstWinMapVtab *, const char *, int * );
/* Loader. */
AstWinMap *astLoadWinMap_( void *, size_t, AstWinMapVtab *,
const char *, AstChannel *, int * );
#endif
/* Prototypes for member functions. */
/* -------------------------------- */
# if defined(astCLASS) /* Protected */
int astWinTerms_( AstWinMap *, double **, double **, int * );
#endif
/* Function interfaces. */
/* ==================== */
/* These macros are wrap-ups for the functions defined by this class
to make them easier to invoke (e.g. to avoid type mis-matches when
passing pointers to objects from derived classes). */
/* Interfaces to standard class functions. */
/* --------------------------------------- */
/* Some of these functions provide validation, so we cannot use them
to validate their own arguments. We must use a cast when passing
object pointers (so that they can accept objects from derived
classes). */
/* Check class membership. */
#define astCheckWinMap(this) astINVOKE_CHECK(WinMap,this,0)
#define astVerifyWinMap(this) astINVOKE_CHECK(WinMap,this,1)
/* Test class membership. */
#define astIsAWinMap(this) astINVOKE_ISA(WinMap,this)
/* Constructor. */
#if defined(astCLASS) /* Protected. */
#define astWinMap astINVOKE(F,astWinMap_)
#else
#define astWinMap astINVOKE(F,astWinMapId_)
#endif
#if defined(astCLASS) /* Protected */
/* Initialiser. */
#define \
astInitWinMap(mem,size,init,vtab,name,ncoord,c1_in,c2_in,c1_out,c2_out) \
astINVOKE(O,astInitWinMap_(mem,size,init,vtab,name,ncoord,c1_in,c2_in,c1_out,c2_out,STATUS_PTR))
/* Vtab Initialiser. */
#define astInitWinMapVtab(vtab,name) astINVOKE(V,astInitWinMapVtab_(vtab,name,STATUS_PTR))
/* Loader. */
#define astLoadWinMap(mem,size,vtab,name,channel) \
astINVOKE(O,astLoadWinMap_(mem,size,vtab,name,astCheckChannel(channel),STATUS_PTR))
#endif
/* Interfaces to public member functions. */
/* -------------------------------------- */
/* Here we make use of astCheckWinMap to validate WinMap pointers
before use. This provides a contextual error report if a pointer
to the wrong sort of Object is supplied. */
#if defined(astCLASS) /* Protected */
#define astWinTerms(this,scale,shift) \
astINVOKE(V,astWinTerms_(astCheckWinMap(this),scale,shift,STATUS_PTR))
#endif
#endif