pointer.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 371 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"

#ifndef EXPERIMENTAL_MOUSE_CURSOR_SUPPORT

/*
 * DrvSetPointerShape
 *
 * Sets the new pointer shape.
 *
 * Status
 *    @unimplemented
 */

ULONG DDKAPI
DrvSetPointerShape(
   IN SURFOBJ *pso,
   IN SURFOBJ *psoMask,
   IN SURFOBJ *psoColor,
   IN XLATEOBJ *pxlo,
   IN LONG xHot,
   IN LONG yHot,
   IN LONG x,
   IN LONG y,
   IN RECTL *prcl,
   IN FLONG fl)
{
/*   return SPS_DECLINE;*/
   return EngSetPointerShape(pso, psoMask, psoColor, pxlo, xHot, yHot, x, y, prcl, fl);
}

/*
 * DrvMovePointer
 *
 * Moves the pointer to a new position and ensures that GDI does not interfere
 * with the display of the pointer.
 *
 * Status
 *    @unimplemented
 */

VOID DDKAPI
DrvMovePointer(
   IN SURFOBJ *pso,
   IN LONG x,
   IN LONG y,
   IN RECTL *prcl)
{
   return EngMovePointer(pso, x, y, prcl);
}

#else

VOID FASTCALL
IntHideMousePointer(PPDEV ppdev, SURFOBJ *DestSurface)
{
   if (ppdev->PointerAttributes.Enable == FALSE)
   {
      return;
   }

   ppdev->PointerAttributes.Enable = FALSE;
   if (ppdev->PointerSaveSurface != NULL)
   {
      RECTL DestRect;
      POINTL SrcPoint;
      SURFOBJ *SaveSurface;
      SURFOBJ *MaskSurface;

      DestRect.left = max(ppdev->PointerAttributes.Column, 0);
      DestRect.top = max(ppdev->PointerAttributes.Row, 0);
      DestRect.right = min(
         ppdev->PointerAttributes.Column + ppdev->PointerAttributes.Width,
         ppdev->ScreenWidth - 1);
      DestRect.bottom = min(
         ppdev->PointerAttributes.Row + ppdev->PointerAttributes.Height,
         ppdev->ScreenHeight - 1);

      SrcPoint.x = max(-ppdev->PointerAttributes.Column, 0);
      SrcPoint.y = max(-ppdev->PointerAttributes.Row, 0);

      SaveSurface = EngLockSurface(ppdev->PointerSaveSurface);
      MaskSurface = EngLockSurface(ppdev->PointerMaskSurface);
      EngBitBlt(DestSurface, SaveSurface, MaskSurface, NULL, NULL,
                &DestRect, &SrcPoint, &SrcPoint, NULL, NULL, SRCCOPY);
      EngUnlockSurface(MaskSurface);
      EngUnlockSurface(SaveSurface);
   }
}

VOID FASTCALL
IntShowMousePointer(PPDEV ppdev, SURFOBJ *DestSurface)
{
   if (ppdev->PointerAttributes.Enable == TRUE)
   {
      return;
   }

   ppdev->PointerAttributes.Enable = TRUE;

   /*
    * Copy the pixels under the cursor to temporary surface.
    */

   if (ppdev->PointerSaveSurface != NULL)
   {
      RECTL DestRect;
      POINTL SrcPoint;
      SURFOBJ *SaveSurface;

      SrcPoint.x = max(ppdev->PointerAttributes.Column, 0);
      SrcPoint.y = max(ppdev->PointerAttributes.Row, 0);

      DestRect.left = SrcPoint.x - ppdev->PointerAttributes.Column;
      DestRect.top = SrcPoint.y - ppdev->PointerAttributes.Row;
      DestRect.right = min(
         ppdev->PointerAttributes.Width,
         ppdev->ScreenWidth - ppdev->PointerAttributes.Column - 1);
      DestRect.bottom = min(
         ppdev->PointerAttributes.Height,
         ppdev->ScreenHeight - ppdev->PointerAttributes.Row - 1);

      SaveSurface = EngLockSurface(ppdev->PointerSaveSurface);
      EngBitBlt(SaveSurface, DestSurface, NULL, NULL, NULL,
                &DestRect, &SrcPoint, NULL, NULL, NULL, SRCCOPY);
      EngUnlockSurface(SaveSurface);
   }

   /*
    * Blit the cursor on the screen.
    */

   {
      RECTL DestRect;
      POINTL SrcPoint;
      SURFOBJ *ColorSurf;
      SURFOBJ *MaskSurf;

      DestRect.left = max(ppdev->PointerAttributes.Column, 0);
      DestRect.top = max(ppdev->PointerAttributes.Row, 0);
      DestRect.right = min(
         ppdev->PointerAttributes.Column + ppdev->PointerAttributes.Width,
         ppdev->ScreenWidth - 1);
      DestRect.bottom = min(
         ppdev->PointerAttributes.Row + ppdev->PointerAttributes.Height,
         ppdev->ScreenHeight - 1);

      SrcPoint.x = max(-ppdev->PointerAttributes.Column, 0);
      SrcPoint.y = max(-ppdev->PointerAttributes.Row, 0);

      MaskSurf = EngLockSurface(ppdev->PointerMaskSurface);
      if (ppdev->PointerColorSurface != NULL)
      {
         ColorSurf = EngLockSurface(ppdev->PointerColorSurface);
         EngBitBlt(DestSurface, ColorSurf, MaskSurf, NULL, ppdev->PointerXlateObject,
                   &DestRect, &SrcPoint, &SrcPoint, NULL, NULL, 0xAACC);
         EngUnlockSurface(ColorSurf);
      }
      else
      {
         /* FIXME */
         EngBitBlt(DestSurface, MaskSurf, NULL, NULL, ppdev->PointerXlateObject,
                   &DestRect, &SrcPoint, NULL, NULL, NULL, SRCAND);
         SrcPoint.y += ppdev->PointerAttributes.Height;
         EngBitBlt(DestSurface, MaskSurf, NULL, NULL, ppdev->PointerXlateObject,
                   &DestRect, &SrcPoint, NULL, NULL, NULL, SRCINVERT);
      }
      EngUnlockSurface(MaskSurf);
   }
}

/*
 * DrvSetPointerShape
 *
 * Sets the new pointer shape.
 *
 * Status
 *    @implemented
 */

ULONG DDKAPI
DrvSetPointerShape(
   IN SURFOBJ *pso,
   IN SURFOBJ *psoMask,
   IN SURFOBJ *psoColor,
   IN XLATEOBJ *pxlo,
   IN LONG xHot,
   IN LONG yHot,
   IN LONG x,
   IN LONG y,
   IN RECTL *prcl,
   IN FLONG fl)
{
   PPDEV ppdev = (PPDEV)pso->dhpdev;
   SURFOBJ *TempSurfObj;

   IntHideMousePointer(ppdev, pso);

   if (ppdev->PointerColorSurface != NULL)
   {
      /* FIXME: Is this really needed? */
      TempSurfObj = EngLockSurface(ppdev->PointerColorSurface);
      EngFreeMem(TempSurfObj->pvBits);
      TempSurfObj->pvBits = 0;
      EngUnlockSurface(TempSurfObj);

      EngDeleteSurface(ppdev->PointerColorSurface);
      ppdev->PointerMaskSurface = NULL;
   }

   if (ppdev->PointerMaskSurface != NULL)
   {
      /* FIXME: Is this really needed? */
      TempSurfObj = EngLockSurface(ppdev->PointerMaskSurface);
      EngFreeMem(TempSurfObj->pvBits);
      TempSurfObj->pvBits = 0;
      EngUnlockSurface(TempSurfObj);

      EngDeleteSurface(ppdev->PointerMaskSurface);
      ppdev->PointerMaskSurface = NULL;
   }

   if (ppdev->PointerSaveSurface != NULL)
   {
      EngDeleteSurface(ppdev->PointerSaveSurface);
      ppdev->PointerSaveSurface = NULL;
   }

   /*
    * See if we are being asked to hide the pointer.
    */

   if (psoMask == NULL)
   {
      return SPS_ACCEPT_EXCLUDE;
   }

   ppdev->PointerHotSpot.x = xHot;
   ppdev->PointerHotSpot.y = yHot;

   ppdev->PointerXlateObject = pxlo;
   ppdev->PointerAttributes.Column = x - xHot;
   ppdev->PointerAttributes.Row = y - yHot;
   ppdev->PointerAttributes.Width = psoMask->lDelta << 3;
   ppdev->PointerAttributes.Height = (psoMask->cjBits / psoMask->lDelta) >> 1;

   if (psoColor != NULL)
   {
      SIZEL Size;
      PBYTE Bits;

      Size.cx = ppdev->PointerAttributes.Width;
      Size.cy = ppdev->PointerAttributes.Height;
      Bits = EngAllocMem(0, psoColor->cjBits, ALLOC_TAG);
      memcpy(Bits, psoColor->pvBits, psoColor->cjBits);

      ppdev->PointerColorSurface = (HSURF)EngCreateBitmap(Size,
         psoColor->lDelta, psoColor->iBitmapFormat, 0, Bits);
   }
   else
   {
      ppdev->PointerColorSurface = NULL;
   }

   if (psoMask != NULL)
   {
      SIZEL Size;
      PBYTE Bits;

      Size.cx = ppdev->PointerAttributes.Width;
      Size.cy = ppdev->PointerAttributes.Height << 1;
      Bits = EngAllocMem(0, psoMask->cjBits, ALLOC_TAG);
      memcpy(Bits, psoMask->pvBits, psoMask->cjBits);

      ppdev->PointerMaskSurface = (HSURF)EngCreateBitmap(Size,
         psoMask->lDelta, psoMask->iBitmapFormat, 0, Bits);
   }
   else
   {
      ppdev->PointerMaskSurface = NULL;
   }

   /*
    * Create surface for saving the pixels under the cursor.
    */

   {
      SIZEL Size;
      LONG lDelta;

      Size.cx = ppdev->PointerAttributes.Width;
      Size.cy = ppdev->PointerAttributes.Height;

      switch (pso->iBitmapFormat)
      {
         case BMF_8BPP: lDelta = Size.cx; break;
         case BMF_16BPP: lDelta = Size.cx << 1; break;
         case BMF_24BPP: lDelta = Size.cx * 3; break;
         case BMF_32BPP: lDelta = Size.cx << 2; break;
      }

      ppdev->PointerSaveSurface = (HSURF)EngCreateBitmap(
         Size, lDelta, pso->iBitmapFormat, BMF_NOZEROINIT, NULL);
   }

   IntShowMousePointer(ppdev, pso);

   return SPS_ACCEPT_EXCLUDE;
}

/*
 * DrvMovePointer
 *
 * Moves the pointer to a new position and ensures that GDI does not interfere
 * with the display of the pointer.
 *
 * Status
 *    @implemented
 */

VOID DDKAPI
DrvMovePointer(
   IN SURFOBJ *pso,
   IN LONG x,
   IN LONG y,
   IN RECTL *prcl)
{
   PPDEV ppdev = (PPDEV)pso->dhpdev;
   BOOL WasVisible;

   WasVisible = ppdev->PointerAttributes.Enable;
   if (WasVisible)
   {
      IntHideMousePointer(ppdev, pso);
   }

   if (x == -1)
   {
      return;
   }

   ppdev->PointerAttributes.Column = x - ppdev->PointerHotSpot.x;
   ppdev->PointerAttributes.Row = y - ppdev->PointerHotSpot.y;

   if (WasVisible)
   {
      IntShowMousePointer(ppdev, pso);
   }
}

#endif