104 lines
4.3 KiB
C
104 lines
4.3 KiB
C
/*
|
|
* CDE - Common Desktop Environment
|
|
*
|
|
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
|
|
*
|
|
* These libraries and programs are free software; you can
|
|
* redistribute them and/or modify them 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.
|
|
*
|
|
* These libraries and programs are distributed in the hope that
|
|
* they 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 these libraries and programs; if not, write
|
|
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
|
|
* Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
/* $XConsortium: ilscaleint.h /main/3 1995/10/23 16:00:23 rswiston $ */
|
|
/**---------------------------------------------------------------------
|
|
***
|
|
*** (c)Copyright 1991 Hewlett-Packard Co.
|
|
***
|
|
*** RESTRICTED RIGHTS LEGEND
|
|
*** Use, duplication, or disclosure by the U.S. Government is subject to
|
|
*** restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
|
|
*** Technical Data and Computer Software clause in DFARS 252.227-7013.
|
|
*** Hewlett-Packard Company
|
|
*** 3000 Hanover Street
|
|
*** Palo Alto, CA 94304 U.S.A.
|
|
*** Rights for non-DOD U.S. Government Departments and Agencies are as set
|
|
*** forth in FAR 52.227-19(c)(1,2).
|
|
***
|
|
***-------------------------------------------------------------------*/
|
|
|
|
#ifndef ILSCALEINT_H
|
|
#define ILSCALEINT_H
|
|
|
|
/* PRIVATE definitions shared between scaling code, e.g. /ilc/ilscale.c .
|
|
NO OTHER CODE SHOULD INCLUDE THIS FILE !
|
|
*/
|
|
|
|
|
|
/* In /ilc/ilbigray.c : */
|
|
|
|
/* Called by ilScale().
|
|
Adds an element to "pipe" to scale the pipe image to "dstWidth" by "dstHeight"
|
|
which both must be > 0. The input pipe image must be a bitonal,
|
|
bit-per-pixel image, with the given "blackIsZero". "pInfo" points to the
|
|
pipe info, "dstWidth/Height" is the (> 0) size to scale to, and nGrayLevels
|
|
is the number of levels of gray. The output image is a gray image.
|
|
Only a scale down in both directions is allowed; the following must be true:
|
|
srcWidth must be >= dstWidth and srcHeight must be >= dstHeight!
|
|
*/
|
|
IL_EXTERN void _ilScaleBitonalToGray (
|
|
ilPipe pipe,
|
|
unsigned long dstWidth,
|
|
unsigned long dstHeight,
|
|
unsigned long nGrayLevels,
|
|
ilBool blackIsZero,
|
|
ilPipeInfo *pInfo
|
|
);
|
|
|
|
/* Called by ilScale().
|
|
Adds an element to "pipe" to scale the pipe image to "dstWidth" by "dstHeight"
|
|
which both must be > 0. The input pipe image must be a bitonal,
|
|
bit-per-pixel image, with _any_ "blackIsZero". The resulting image is of the
|
|
same type. "pInfo" points to the pipe info, "dstWidth/Height" is the (> 0) size
|
|
to scale to.
|
|
Only a scale down in both directions is allowed; the following must be true:
|
|
srcWidth must be >= dstWidth and srcHeight must be >= dstHeight!
|
|
Logically the same as ilScaleBitonalToGray(): a gray byte is produced for
|
|
each destination pixel, using 256 levels of gray. If that byte is
|
|
>= "*pGrayThreshold"; a white pixel is written; else a black pixel is written.
|
|
NOTE: the value at "*pGrayThreshold" is read each time the pipe is executed
|
|
(during Init()); the caller change its value and get different results without
|
|
recreating the pipe. If "pGrayThreshold" is NULL, a default value is used.
|
|
*/
|
|
IL_EXTERN void _ilAreaScaleBitonal (
|
|
ilPipe pipe,
|
|
unsigned long dstWidth,
|
|
unsigned long dstHeight,
|
|
int *pGrayThreshold,
|
|
ilPipeInfo *pInfo
|
|
);
|
|
|
|
IL_EXTERN void _ilScaleSample (
|
|
ilPipe pipe,
|
|
int Ncomponents,
|
|
unsigned long dstWidth,
|
|
unsigned long dstHeight,
|
|
unsigned long nLevels,
|
|
ilBool blackIsZero,
|
|
ilPipeInfo *pInfo
|
|
);
|
|
|
|
|
|
|
|
#endif
|