xserver-multidpi/hw/xwin/winrandr.c

/*
 *Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
 *Copyright (C) 2009-2010 Jon TURNEY
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 *a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of the author(s)
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from the author(s)
 *
 * Authors:	Harold L Hunt II
 *              Jon TURNEY
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
#include "mivalidate.h" // for union _Validate used by windowstr.h

#ifndef RANDR_12_INTERFACE
#error X server must have RandR 1.2 interface
#endif


/*
 * Answer queries about the RandR features supported.
 */

static Bool
winRandRGetInfo (ScreenPtr pScreen, Rotation *pRotations)
{
  winDebug ("winRandRGetInfo ()\n");

  /* Don't support rotations */
  *pRotations = RR_Rotate_0;

  /*
    The screen doesn't have to be limited to the actual
    monitor size (we can have scrollbars :-), so what is
    the upper limit?
  */
  RRScreenSetSizeRange(pScreen, 0, 0, 4096, 4096);

  return TRUE;
}


/*
  Copied from the xfree86 DDX

  Why can't this be in DIX?
  Does union _Validate vary depending on DDX??
 */
static void
xf86SetRootClip (ScreenPtr pScreen, Bool enable)
{
    WindowPtr	pWin = pScreen->root;
    WindowPtr	pChild;
    Bool	WasViewable = (Bool)(pWin->viewable);
    Bool	anyMarked = FALSE;
    WindowPtr   pLayerWin;
    BoxRec	box;

    if (WasViewable)
    {
	for (pChild = pWin->firstChild; pChild; pChild = pChild->nextSib)
	{
	    (void) (*pScreen->MarkOverlappedWindows)(pChild,
						     pChild,
						     &pLayerWin);
	}
	(*pScreen->MarkWindow) (pWin);
	anyMarked = TRUE;
	if (pWin->valdata)
	{
	    if (HasBorder (pWin))
	    {
		RegionPtr	borderVisible;

		borderVisible = REGION_CREATE(pScreen, NullBox, 1);
		REGION_SUBTRACT(pScreen, borderVisible,
				&pWin->borderClip, &pWin->winSize);
		pWin->valdata->before.borderVisible = borderVisible;
	    }
	    pWin->valdata->before.resized = TRUE;
	}
    }

    /*
     * Use REGION_BREAK to avoid optimizations in ValidateTree
     * that assume the root borderClip can't change well, normally
     * it doesn't...)
     */
    if (enable)
    {
	box.x1 = 0;
	box.y1 = 0;
	box.x2 = pScreen->width;
	box.y2 = pScreen->height;
	REGION_INIT (pScreen, &pWin->winSize, &box, 1);
	REGION_INIT (pScreen, &pWin->borderSize, &box, 1);
	if (WasViewable)
	    REGION_RESET(pScreen, &pWin->borderClip, &box);
	pWin->drawable.width = pScreen->width;
	pWin->drawable.height = pScreen->height;
        REGION_BREAK (pWin->drawable.pScreen, &pWin->clipList);
    }
    else
    {
	REGION_EMPTY(pScreen, &pWin->borderClip);
	REGION_BREAK (pWin->drawable.pScreen, &pWin->clipList);
    }

    ResizeChildrenWinSize (pWin, 0, 0, 0, 0);

    if (WasViewable)
    {
	if (pWin->firstChild)
	{
	    anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin->firstChild,
							   pWin->firstChild,
							   (WindowPtr *)NULL);
	}
	else
	{
	    (*pScreen->MarkWindow) (pWin);
	    anyMarked = TRUE;
	}


	if (anyMarked)
	    (*pScreen->ValidateTree)(pWin, NullWindow, VTOther);
    }

    if (WasViewable)
    {
	if (anyMarked)
	    (*pScreen->HandleExposures)(pWin);
	if (anyMarked && pScreen->PostValidateTree)
	    (*pScreen->PostValidateTree)(pWin, NullWindow, VTOther);
    }
    if (pWin->realized)
	WindowsRestructured ();
    FlushAllOutput ();
}

/*

*/
void
winDoRandRScreenSetSize (ScreenPtr  pScreen,
                         CARD16	    width,
                         CARD16	    height,
                         CARD32	    mmWidth,
                         CARD32	    mmHeight)
{
  winScreenPriv(pScreen);
  winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
  WindowPtr pRoot = pScreen->root;

  // Prevent screen updates while we change things around
  xf86SetRootClip(pScreen, FALSE);

  /* Update the screen size as requested */
  pScreenInfo->dwWidth = width;
  pScreenInfo->dwHeight = height;

  /* Reallocate the framebuffer used by the drawing engine */
  (*pScreenPriv->pwinFreeFB)(pScreen);
  if (!(*pScreenPriv->pwinAllocateFB)(pScreen))
    {
      ErrorF ("winDoRandRScreenSetSize - Could not reallocate framebuffer\n");
    }

  pScreen->width = width;
  pScreen->height = height;
  pScreen->mmWidth = mmWidth;
  pScreen->mmHeight = mmHeight;

  /* Update the screen pixmap to point to the new framebuffer */
  winUpdateFBPointer(pScreen, pScreenInfo->pfb);

  // pScreen->devPrivate == pScreen->GetScreenPixmap(screen) ?
  // resize the root window
  //pScreen->ResizeWindow(pRoot, 0, 0, width, height, NULL);
  // does this emit a ConfigureNotify??

  // Restore the ability to update screen, now with new dimensions
  xf86SetRootClip(pScreen, TRUE);

  // and arrange for it to be repainted
  miPaintWindow(pRoot, &pRoot->borderClip,  PW_BACKGROUND);

  /* Indicate that a screen size change took place */
  RRScreenSizeNotify(pScreen);
}

/*
 * Respond to resize request
 */
static
Bool
winRandRScreenSetSize (ScreenPtr  pScreen,
		       CARD16	    width,
		       CARD16	    height,
		       CARD16       pixWidth,
		       CARD16       pixHeight,
		       CARD32	    mmWidth,
		       CARD32	    mmHeight)
{
  winScreenPriv(pScreen);
  winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;

  winDebug ("winRandRScreenSetSize ()\n");

  /*
    It doesn't currently make sense to allow resize in fullscreen mode
    (we'd actually have to list the supported resolutions)
  */
  if (pScreenInfo->fFullScreen)
    {
      ErrorF ("winRandRScreenSetSize - resize not supported in fullscreen mode\n");
      return FALSE;
    }

  /*
    Client resize requests aren't allowed in rootless modes, even if
    the X screen is monitor or virtual desktop size, we'd need to
    resize the native display size
  */
  if (FALSE
#ifdef XWIN_MULTIWINDOWEXTWM
      || pScreenInfo->fMWExtWM
#endif
      || pScreenInfo->fRootless
#ifdef XWIN_MULTIWINDOW
      || pScreenInfo->fMultiWindow
#endif
      )
    {
      ErrorF ("winRandRScreenSetSize - resize not supported in rootless modes\n");
      return FALSE;
    }

  winDoRandRScreenSetSize(pScreen, width, height, mmWidth, mmHeight);

  /* Cause the native window for the screen to resize itself */
  {
    DWORD dwStyle, dwExStyle;
    RECT rcClient;

    rcClient.left = 0;
    rcClient.top = 0;
    rcClient.right = width;
    rcClient.bottom = height;

    ErrorF ("winRandRScreenSetSize new client area w: %d h: %d\n", width, height);

    /* Get the Windows window style and extended style */
    dwExStyle = GetWindowLongPtr(pScreenPriv->hwndScreen, GWL_EXSTYLE);
    dwStyle = GetWindowLongPtr(pScreenPriv->hwndScreen, GWL_STYLE);

    /*
     * Calculate the window size needed for the given client area
     * adjusting for any decorations it will have
     */
    AdjustWindowRectEx(&rcClient, dwStyle, FALSE, dwExStyle);

    ErrorF ("winRandRScreenSetSize new window area w: %ld h: %ld\n", rcClient.right-rcClient.left, rcClient.bottom-rcClient.top);

    SetWindowPos(pScreenPriv->hwndScreen, NULL,
                 0, 0, rcClient.right-rcClient.left, rcClient.bottom-rcClient.top,
                 SWP_NOZORDER | SWP_NOMOVE);
  }

  return TRUE;
}

/*
 * Initialize the RandR layer.
 */

Bool
winRandRInit (ScreenPtr pScreen)
{
  rrScrPrivPtr pRRScrPriv;
  winDebug ("winRandRInit ()\n");

  if (!RRScreenInit (pScreen))
    {
      ErrorF ("winRandRInit () - RRScreenInit () failed\n");
      return FALSE;
    }

  /* Set some RandR function pointers */
  pRRScrPriv = rrGetScrPriv (pScreen);
  pRRScrPriv->rrGetInfo = winRandRGetInfo;
  pRRScrPriv->rrSetConfig = NULL;
  pRRScrPriv->rrScreenSetSize = winRandRScreenSetSize;
  pRRScrPriv->rrCrtcSet = NULL;
  pRRScrPriv->rrCrtcSetGamma = NULL;

  return TRUE;
}