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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifndef __RFB_WIN32_LOGPALETTE_H__
#define __RFB_WIN32_LOGPALETTE_H__
#include <windows.h>
#include <rdr/Exception.h>
namespace rfb {
namespace win32 {
class LogicalPalette {
public:
LogicalPalette() {
BYTE buf[sizeof(LOGPALETTE)+256*sizeof(PALETTEENTRY)];
LOGPALETTE* logpal = (LOGPALETTE*)buf;
logpal->palVersion = 0x300;
logpal->palNumEntries = 256;
for (int i=0; i<256;i++) {
logpal->palPalEntry[i].peRed = 0;
logpal->palPalEntry[i].peGreen = 0;
logpal->palPalEntry[i].peBlue = 0;
logpal->palPalEntry[i].peFlags = 0;
}
palette = CreatePalette(logpal);
if (!palette)
throw rdr::SystemException("failed to CreatePalette", GetLastError());
}
~LogicalPalette() {
if (palette && !DeleteObject(palette))
throw rdr::SystemException("del palette failed", GetLastError());
}
void setEntries(int start, int count, const Colour* cols) {
if (numEntries < count) {
ResizePalette(palette, start+count);
numEntries = start+count;
}
PALETTEENTRY* logpal = new PALETTEENTRY[count];
for (int i=0; i<count; i++) {
logpal[i].peRed = cols[i].r >> 8;
logpal[i].peGreen = cols[i].g >> 8;
logpal[i].peBlue = cols[i].b >> 8;
logpal[i].peFlags = 0;
}
UnrealizeObject(palette);
SetPaletteEntries(palette, start, count, logpal);
delete [] logpal;
}
HPALETTE getHandle() {return palette;}
protected:
HPALETTE palette;
int numEntries;
};
class PaletteSelector {
public:
PaletteSelector(HDC dc, HPALETTE pal) : device(dc), redrawRequired(false) {
oldPal = SelectPalette(dc, pal, FALSE);
redrawRequired = RealizePalette(dc) > 0;
}
~PaletteSelector() {
if (oldPal) SelectPalette(device, oldPal, TRUE);
}
bool isRedrawRequired() {return redrawRequired;}
protected:
HPALETTE oldPal;
HDC device;
bool redrawRequired;
};
};
};
#endif
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