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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