IABSD.fr/xenocara/xserver/hw/kdrive/src/kshadow.c

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  Commit

• Author : matthieu
  Date : 2019-07-27 07:57:06
  Hash : a77e9959
  Message : Update to xserver 1.20.5. Tested by jsg@

• xserver/hw/kdrive/src/kshadow.c

• /*
   * Copyright © 1999 Keith Packard
   *
   * Permission to use, copy, modify, distribute, and sell this software and its
   * documentation for any purpose is hereby granted without fee, provided that
   * the above copyright notice appear in all copies and that both that
   * copyright notice and this permission notice appear in supporting
   * documentation, and that the name of Keith Packard not be used in
   * advertising or publicity pertaining to distribution of the software without
   * specific, written prior permission.  Keith Packard makes no
   * representations about the suitability of this software for any purpose.  It
   * is provided "as is" without express or implied warranty.
   *
   * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
   * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
   * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
   * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
   * PERFORMANCE OF THIS SOFTWARE.
   */
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  #include "kdrive.h"
  
  Bool
  KdShadowFbAlloc(KdScreenInfo * screen, Bool rotate)
  {
      int paddedWidth;
      void *buf;
      int width = rotate ? screen->height : screen->width;
      int height = rotate ? screen->width : screen->height;
      int bpp = screen->fb.bitsPerPixel;
  
      /* use fb computation for width */
      paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
      buf = xallocarray(paddedWidth, height);
      if (!buf)
          return FALSE;
      if (screen->fb.shadow)
          free(screen->fb.frameBuffer);
      screen->fb.shadow = TRUE;
      screen->fb.frameBuffer = buf;
      screen->fb.byteStride = paddedWidth;
      screen->fb.pixelStride = paddedWidth * 8 / bpp;
      return TRUE;
  }
  
  void
  KdShadowFbFree(KdScreenInfo * screen)
  {
      if (screen->fb.shadow) {
          free(screen->fb.frameBuffer);
          screen->fb.frameBuffer = 0;
          screen->fb.shadow = FALSE;
      }
  }
  
  Bool
  KdShadowSet(ScreenPtr pScreen, int randr, ShadowUpdateProc update,
              ShadowWindowProc window)
  {
      KdScreenPriv(pScreen);
      KdScreenInfo *screen = pScreenPriv->screen;
  
      shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
      if (screen->fb.shadow) {
          return shadowAdd(pScreen, pScreen->GetScreenPixmap(pScreen),
                           update, window, randr, 0);
      }
      return TRUE;
  }
  
  void
  KdShadowUnset(ScreenPtr pScreen)
  {
      shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
  }