palette.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 *  ReactOS W32 Subsystem
 *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
 *
 *  This program 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 program 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 program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/* $Id: palette.c 21433 2006-04-01 15:25:40Z gedmurphy $
 *
 * COPYRIGHT:         See COPYING in the top level directory
 * PROJECT:           ReactOS kernel
 * PURPOSE:           GDI Palette Functions
 * FILE:              subsys/win32k/eng/palette.c
 * PROGRAMER:         Jason Filby
 * REVISION HISTORY:
 *                 11/7/1999: Created
 */

#include <w32k.h>

#define NDEBUG
#include <debug.h>

/*
 * @implemented
 */
HPALETTE STDCALL
EngCreatePalette(ULONG Mode, ULONG NumColors, ULONG *Colors,
                 ULONG Red, ULONG Green, ULONG Blue)
{
   HPALETTE Palette;

   Palette = PALETTE_AllocPalette(Mode, NumColors, Colors, Red, Green, Blue);
   if (Palette != NULL)
   {
      GDIOBJ_SetOwnership(GdiHandleTable, Palette, NULL);
   }

   return Palette;
}

/*
 * @implemented
 */
BOOL STDCALL
EngDeletePalette(IN HPALETTE Palette)
{
   GDIOBJ_SetOwnership(GdiHandleTable, Palette, PsGetCurrentProcess());

   return PALETTE_FreePalette(Palette);
}

/*
 * @implemented
 */
ULONG STDCALL
PALOBJ_cGetColors(PALOBJ *PalObj, ULONG Start, ULONG Colors, ULONG *PaletteEntry)
{
   PALGDI *PalGDI;

   PalGDI = (PALGDI*)PalObj;
   /* PalGDI = (PALGDI*)AccessInternalObjectFromUserObject(PalObj); */

   if (Start >= PalGDI->NumColors)
      return 0;

   Colors = min(Colors, PalGDI->NumColors - Start);

   /* NOTE: PaletteEntry ULONGs are in the same order as PALETTEENTRY. */
   RtlCopyMemory(PaletteEntry, PalGDI->IndexedColors + Start, sizeof(ULONG) * Colors);

   return Colors;
}

/* EOF */