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/****************************************************************************/
/* */
/* Microsoft Confidential */
/* */
/* Copyright (c) Microsoft Corp. 1987, 1991 */
/* All Rights Reserved */
/* */
/****************************************************************************/
/****************************** Module Header *******************************
* Module Name: rwpal.c
*
* Routines for reading and writing color palette files.
*
* History:
*
****************************************************************************/
#include "imagedit.h"
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <sys\types.h> // For fstat() types.
#include <sys\stat.h> // For fstat() function.
/*
* The color palette is saved in a .PAL file. This file consists
* of a header followed by the colors.
*
* The header has the following format:
*
* struct {
* CHAR tag; // Always 'C'.
* WORD colors; // Number of colors. Always COLORSMAX.
* CHAR reserved[47]; // Reserved bytes.
* }
*
* Immediately following this is RGB quads for each of the colors in
* the palette.
*/
/*
* Size in bytes of the header of a color palette file.
*/
#define CBCOLORHDR (sizeof(CHAR) + sizeof(WORD) + 47)
/*
* Size in bytes of the color information in the color file.
*/
#define CBCOLORINFO (sizeof(DWORD) * COLORSMAX)
/*
* Size in bytes of a color palette file. This includes the
* size of the header and room for all the colors.
*/
#define CBCOLORFILE (CBCOLORHDR + CBCOLORINFO)
/************************************************************************
* LoadColorFile
*
*
*
* Arguments:
*
* History:
*
************************************************************************/
VOID LoadColorFile(VOID)
{
HFILE hf;
OFSTRUCT OfStruct;
struct _stat FileStatus;
DWORD argb[COLORSMAX];
UINT cbRead;
INT i;
CHAR tag;
CHAR szFileName[CCHMAXPATH];
*szFileName = '\0';
if (!OpenDlg(szFileName, FT_PALETTE))
return;
if ((hf = MOpenFile(szFileName, (LPOFSTRUCT)&OfStruct, OF_READ))
== (HFILE)-1) {
Message(MSG_CANTOPEN, szFileName);
return;
}
_fstat(HFILE2INT(hf, O_RDONLY), &FileStatus);
if (FileStatus.st_size != CBCOLORFILE) {
Message(MSG_BADPALFILE, szFileName);
goto Error1;
}
if ((cbRead = M_lread(hf, &tag, 1)) == -1 || cbRead != 1) {
Message(MSG_READERROR, szFileName);
goto Error1;
}
if (tag != 'C') {
Message(MSG_BADPALFILE, szFileName);
goto Error1;
}
M_llseek(hf, CBCOLORHDR, 0);
if ((cbRead = M_lread(hf, (LPSTR)argb, CBCOLORINFO)) == -1 ||
cbRead != CBCOLORINFO) {
Message(MSG_READERROR, szFileName);
goto Error1;
}
for (i = 0; i < COLORSMAX; i++)
gargbColor[i] = argb[i];
SetColorPalette(16, giType, TRUE);
Error1:
M_lclose(hf);
}
/************************************************************************
* SaveColorFile
*
*
*
* Arguments:
*
* History:
*
************************************************************************/
VOID SaveColorFile(VOID)
{
INT i;
HFILE hf;
OFSTRUCT OfStruct;
CHAR reserved[47];
WORD wColors = COLORSMAX;
CHAR tag = 'C';
CHAR szFileName[CCHMAXPATH];
*szFileName = '\0';
if (!SaveAsDlg(szFileName, FT_PALETTE))
return;
if ((hf = MOpenFile(szFileName, &OfStruct,
OF_CREATE | OF_WRITE)) == (HFILE)-1) {
Message(MSG_CANTCREATE, szFileName);
return;
}
for (i = 0; i < sizeof(reserved); i++)
reserved[i] = 0;
if (M_lwrite(hf, (LPSTR)&tag, sizeof(tag)) != sizeof(tag) ||
M_lwrite(hf, (LPSTR)&wColors, sizeof(wColors)) !=
sizeof(wColors) ||
M_lwrite(hf, (LPSTR)reserved, sizeof(reserved)) !=
sizeof(reserved) ||
M_lwrite(hf, (LPSTR)gargbColor, CBCOLORINFO) != CBCOLORINFO) {
Message(MSG_WRITEERROR, szFileName);
}
M_lclose(hf);
}
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