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Diffstat (limited to 'win/rfb_win32/LogicalPalette.h')
-rw-r--r-- | win/rfb_win32/LogicalPalette.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/win/rfb_win32/LogicalPalette.h b/win/rfb_win32/LogicalPalette.h new file mode 100644 index 00000000..204f1081 --- /dev/null +++ b/win/rfb_win32/LogicalPalette.h @@ -0,0 +1,90 @@ +/* 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 |