surface.c

来自「ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机」· C语言 代码 · 共 202 行

/*
 * ReactOS Generic Framebuffer display driver
 *
 * Copyright (C) 2004 Filip Navara
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include "framebuf.h"

/*
 * DrvEnableSurface
 *
 * Create engine bitmap around frame buffer and set the video mode requested
 * when PDEV was initialized.
 *
 * Status
 *    @implemented
 */

HSURF DDKAPI
DrvEnableSurface(
   IN DHPDEV dhpdev)
{
   PPDEV ppdev = (PPDEV)dhpdev;
   HSURF hSurface;
   ULONG BitmapType;
   SIZEL ScreenSize;
   VIDEO_MEMORY VideoMemory;
   VIDEO_MEMORY_INFORMATION VideoMemoryInfo;
   ULONG ulTemp;

   /*
    * Set video mode of our adapter.
    */

   if (EngDeviceIoControl(ppdev->hDriver, IOCTL_VIDEO_SET_CURRENT_MODE,
                          &(ppdev->ModeIndex), sizeof(ULONG), NULL, 0,
                          &ulTemp))
   {
      return FALSE;
   }

   /*
    * Map the framebuffer into our memory.
    */

   VideoMemory.RequestedVirtualAddress = NULL;
   if (EngDeviceIoControl(ppdev->hDriver, IOCTL_VIDEO_MAP_VIDEO_MEMORY,
                          &VideoMemory, sizeof(VIDEO_MEMORY),
                          &VideoMemoryInfo, sizeof(VIDEO_MEMORY_INFORMATION),
                          &ulTemp))
   {
      return FALSE;
   }

   ppdev->ScreenPtr = VideoMemoryInfo.FrameBufferBase;

   switch (ppdev->BitsPerPixel)
   {
      case 8:
         IntSetPalette(dhpdev, ppdev->PaletteEntries, 0, 256);
         BitmapType = BMF_8BPP;
         break;

      case 16:
         BitmapType = BMF_16BPP;
         break;

      case 24:
         BitmapType = BMF_24BPP;
         break;

      case 32:
         BitmapType = BMF_32BPP;
         break;

      default:
         return FALSE;
   }

   ppdev->iDitherFormat = BitmapType;

   ScreenSize.cx = ppdev->ScreenWidth;
   ScreenSize.cy = ppdev->ScreenHeight;

   hSurface = (HSURF)EngCreateBitmap(ScreenSize, ppdev->ScreenDelta, BitmapType,
                                     (ppdev->ScreenDelta > 0) ? BMF_TOPDOWN : 0,
                                     ppdev->ScreenPtr);
   if (hSurface == NULL)
   {
      return FALSE;
   }

   /*
    * Associate the surface with our device.
    */

   if (!EngAssociateSurface(hSurface, ppdev->hDevEng, 0))
   {
      EngDeleteSurface(hSurface);
      return FALSE;
   }

   ppdev->hSurfEng = hSurface;

   return hSurface;
}

/*
 * DrvDisableSurface
 *
 * Used by GDI to notify a driver that the surface created by DrvEnableSurface
 * for the current device is no longer needed.
 *
 * Status
 *    @implemented
 */

VOID DDKAPI
DrvDisableSurface(
   IN DHPDEV dhpdev)
{
   DWORD ulTemp;
   VIDEO_MEMORY VideoMemory;
   PPDEV ppdev = (PPDEV)dhpdev;

   EngDeleteSurface(ppdev->hSurfEng);
   ppdev->hSurfEng = NULL;

#ifdef EXPERIMENTAL_MOUSE_CURSOR_SUPPORT
   /* Clear all mouse pointer surfaces. */
   DrvSetPointerShape(NULL, NULL, NULL, NULL, 0, 0, 0, 0, NULL, 0);
#endif

   /*
    * Unmap the framebuffer.
    */

   VideoMemory.RequestedVirtualAddress = ((PPDEV)dhpdev)->ScreenPtr;
   EngDeviceIoControl(((PPDEV)dhpdev)->hDriver, IOCTL_VIDEO_UNMAP_VIDEO_MEMORY,
                      &VideoMemory, sizeof(VIDEO_MEMORY), NULL, 0, &ulTemp);
}

/*
 * DrvAssertMode
 *
 * Sets the mode of the specified physical device to either the mode specified
 * when the PDEV was initialized or to the default mode of the hardware.
 *
 * Status
 *    @implemented
 */

BOOL DDKAPI
DrvAssertMode(
   IN DHPDEV dhpdev,
   IN BOOL bEnable)
{
   PPDEV ppdev = (PPDEV)dhpdev;
   ULONG ulTemp;

   if (bEnable)
   {
      BOOLEAN Result;
      /*
       * Reinitialize the device to a clean state.
       */
      Result = EngDeviceIoControl(ppdev->hDriver, IOCTL_VIDEO_SET_CURRENT_MODE,
                                  &(ppdev->ModeIndex), sizeof(ULONG), NULL, 0,
                                  &ulTemp);
      if (ppdev->BitsPerPixel == 8)
      {
	     IntSetPalette(dhpdev, ppdev->PaletteEntries, 0, 256);
      }

      return Result;

   }
   else
   {
      /*
       * Call the miniport driver to reset the device to a known state.
       */

      return !EngDeviceIoControl(ppdev->hDriver, IOCTL_VIDEO_RESET_DEVICE,
                                 NULL, 0, NULL, 0, &ulTemp);
   }
}