libvips/include/vips/VDisplay.h

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2007-08-29 18:23:50 +02:00
/* VIPS display class.
*
* Hide details of im_col_display API.
*/
/*
This file is part of VIPS.
VIPS 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 2 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 Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef IM_VDISPLAY_H
#define IM_VDISPLAY_H
/* SWIG includes this file directly rather than going through vipscpp.h ... so
* we have to define these macros here as well.
*/
#ifdef SWIG
#define VIPS_NAMESPACE_START namespace vips {
#define VIPS_NAMESPACE_END }
#endif /*SWIG*/
/* Wrap pointers to these, but we don't want to import all the old C API. Just
* declare them.
*/
extern "C" {
struct im_col_display;
struct im_col_tab_disp;
}
VIPS_NAMESPACE_START
// Wrapper over im_col_display with ref counting
class VDisplay {
struct refblock {
im_col_display *disp; // im_col_display struct
im_col_tab_disp *luts; // luts built from this display
int priv; // disp is ours, or system
int nrefs; // Refs to us
// Invalidate lut
void cleanlut();
// Break attached stuff
void cleanref();
// Get ready to write
void wready() throw( VError );
// Check that luts are up-to-date
void cluts() throw( VError );
refblock() : disp(0), luts(0), priv(0), nrefs(1) {}
~refblock() { cleanref(); }
};
refblock *ref;
public:
enum VDisplayType {
BARCO, // Does many corrections for us
DUMB // Needs many corrections
};
// Get named display
VDisplay( const char *name ) throw( VError );
// Get default display
VDisplay();
// Copy constructor
VDisplay( const VDisplay &a ) { ref = a.ref; ref->nrefs++; }
// Assignment
VDisplay &operator=( const VDisplay &a );
// Destructor
virtual ~VDisplay();
// The matrix type we use
typedef float matrix[3][3];
// Extract display pointer
void *disp() const { return( ref->disp ); }
// Extract luts pointer, rebuilding luts if necessary
im_col_tab_disp *luts() const throw( VError )
{ ref->cluts(); return( ref->luts ); }
};
VIPS_NAMESPACE_END
#endif /*IM_VDISPLAY_H*/