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wine/dlls/gdi32/mapping.c
Andrew Nguyen c3e9de0b4c gdi32: Fix a typo in ScaleViewportExtEx. 
Spotted by Gregor Schneider.
2009-12-30 17:10:11 +01:00

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/*
* GDI mapping mode functions
*
* Copyright 1993 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "wownt32.h"
#include "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dc);
/***********************************************************************
* MAPPING_FixIsotropic
*
* Fix viewport extensions for isotropic mode.
*/
static void MAPPING_FixIsotropic( DC * dc )
{
double xdim = fabs((double)dc->vportExtX * dc->virtual_size.cx /
(dc->virtual_res.cx * dc->wndExtX));
double ydim = fabs((double)dc->vportExtY * dc->virtual_size.cy /
(dc->virtual_res.cy * dc->wndExtY));
if (xdim > ydim)
{
INT mincx = (dc->vportExtX >= 0) ? 1 : -1;
dc->vportExtX = floor(dc->vportExtX * ydim / xdim + 0.5);
if (!dc->vportExtX) dc->vportExtX = mincx;
}
else
{
INT mincy = (dc->vportExtY >= 0) ? 1 : -1;
dc->vportExtY = floor(dc->vportExtY * xdim / ydim + 0.5);
if (!dc->vportExtY) dc->vportExtY = mincy;
}
}
/***********************************************************************
* DPtoLP (GDI32.@)
*/
BOOL WINAPI DPtoLP( HDC hdc, LPPOINT points, INT count )
{
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->vport2WorldValid)
{
while (count--)
{
double x = points->x;
double y = points->y;
points->x = floor( x * dc->xformVport2World.eM11 +
y * dc->xformVport2World.eM21 +
dc->xformVport2World.eDx + 0.5 );
points->y = floor( x * dc->xformVport2World.eM12 +
y * dc->xformVport2World.eM22 +
dc->xformVport2World.eDy + 0.5 );
points++;
}
}
release_dc_ptr( dc );
return (count < 0);
}
/***********************************************************************
* LPtoDP (GDI32.@)
*/
BOOL WINAPI LPtoDP( HDC hdc, LPPOINT points, INT count )
{
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
while (count--)
{
double x = points->x;
double y = points->y;
points->x = floor( x * dc->xformWorld2Vport.eM11 +
y * dc->xformWorld2Vport.eM21 +
dc->xformWorld2Vport.eDx + 0.5 );
points->y = floor( x * dc->xformWorld2Vport.eM12 +
y * dc->xformWorld2Vport.eM22 +
dc->xformWorld2Vport.eDy + 0.5 );
points++;
}
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* SetMapMode (GDI32.@)
*/
INT WINAPI SetMapMode( HDC hdc, INT mode )
{
INT ret;
INT horzSize, vertSize, horzRes, vertRes;
DC * dc = get_dc_ptr( hdc );
if (!dc) return 0;
if (dc->funcs->pSetMapMode)
{
if((ret = dc->funcs->pSetMapMode( dc->physDev, mode )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
TRACE("%p %d\n", hdc, mode );
ret = dc->MapMode;
if (mode == dc->MapMode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
goto done;
horzSize = dc->virtual_size.cx;
vertSize = dc->virtual_size.cy;
horzRes = dc->virtual_res.cx;
vertRes = dc->virtual_res.cy;
switch(mode)
{
case MM_TEXT:
dc->wndExtX = 1;
dc->wndExtY = 1;
dc->vportExtX = 1;
dc->vportExtY = 1;
break;
case MM_LOMETRIC:
case MM_ISOTROPIC:
dc->wndExtX = horzSize * 10;
dc->wndExtY = vertSize * 10;
dc->vportExtX = horzRes;
dc->vportExtY = -vertRes;
break;
case MM_HIMETRIC:
dc->wndExtX = horzSize * 100;
dc->wndExtY = vertSize * 100;
dc->vportExtX = horzRes;
dc->vportExtY = -vertRes;
break;
case MM_LOENGLISH:
dc->wndExtX = MulDiv(1000, horzSize, 254);
dc->wndExtY = MulDiv(1000, vertSize, 254);
dc->vportExtX = horzRes;
dc->vportExtY = -vertRes;
break;
case MM_HIENGLISH:
dc->wndExtX = MulDiv(10000, horzSize, 254);
dc->wndExtY = MulDiv(10000, vertSize, 254);
dc->vportExtX = horzRes;
dc->vportExtY = -vertRes;
break;
case MM_TWIPS:
dc->wndExtX = MulDiv(14400, horzSize, 254);
dc->wndExtY = MulDiv(14400, vertSize, 254);
dc->vportExtX = horzRes;
dc->vportExtY = -vertRes;
break;
case MM_ANISOTROPIC:
break;
default:
goto done;
}
dc->MapMode = mode;
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetViewportExtEx (GDI32.@)
*/
BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pSetViewportExt)
{
if((ret = dc->funcs->pSetViewportExt( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (size)
{
size->cx = dc->vportExtX;
size->cy = dc->vportExtY;
}
if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
goto done;
if (!x || !y)
{
ret = FALSE;
goto done;
}
dc->vportExtX = x;
dc->vportExtY = y;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetViewportOrgEx (GDI32.@)
*/
BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pSetViewportOrg)
{
if((ret = dc->funcs->pSetViewportOrg( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (pt)
{
pt->x = dc->vportOrgX;
pt->y = dc->vportOrgY;
}
dc->vportOrgX = x;
dc->vportOrgY = y;
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetWindowExtEx (GDI32.@)
*/
BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pSetWindowExt)
{
if((ret = dc->funcs->pSetWindowExt( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (size)
{
size->cx = dc->wndExtX;
size->cy = dc->wndExtY;
}
if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
goto done;
if (!x || !y)
{
ret = FALSE;
goto done;
}
dc->wndExtX = x;
dc->wndExtY = y;
/* The API docs say that you should call SetWindowExtEx before
SetViewportExtEx. This advice does not imply that Windows
doesn't ensure the isotropic mapping after SetWindowExtEx! */
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetWindowOrgEx (GDI32.@)
*/
BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pSetWindowOrg)
{
if((ret = dc->funcs->pSetWindowOrg( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (pt)
{
pt->x = dc->wndOrgX;
pt->y = dc->wndOrgY;
}
dc->wndOrgX = x;
dc->wndOrgY = y;
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* OffsetViewportOrgEx (GDI32.@)
*/
BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pOffsetViewportOrg)
{
if((ret = dc->funcs->pOffsetViewportOrg( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (pt)
{
pt->x = dc->vportOrgX;
pt->y = dc->vportOrgY;
}
dc->vportOrgX += x;
dc->vportOrgY += y;
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* OffsetWindowOrgEx (GDI32.@)
*/
BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pOffsetWindowOrg)
{
if((ret = dc->funcs->pOffsetWindowOrg( dc->physDev, x, y )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (pt)
{
pt->x = dc->wndOrgX;
pt->y = dc->wndOrgY;
}
dc->wndOrgX += x;
dc->wndOrgY += y;
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* ScaleViewportExtEx (GDI32.@)
*/
BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
INT yNum, INT yDenom, LPSIZE size )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pScaleViewportExt)
{
if((ret = dc->funcs->pScaleViewportExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (size)
{
size->cx = dc->vportExtX;
size->cy = dc->vportExtY;
}
if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
goto done;
if (!xNum || !xDenom || !yNum || !yDenom)
{
ret = FALSE;
goto done;
}
dc->vportExtX = (dc->vportExtX * xNum) / xDenom;
dc->vportExtY = (dc->vportExtY * yNum) / yDenom;
if (dc->vportExtX == 0) dc->vportExtX = 1;
if (dc->vportExtY == 0) dc->vportExtY = 1;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* ScaleWindowExtEx (GDI32.@)
*/
BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
INT yNum, INT yDenom, LPSIZE size )
{
INT ret = TRUE;
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
if (dc->funcs->pScaleWindowExt)
{
if((ret = dc->funcs->pScaleWindowExt( dc->physDev, xNum, xDenom, yNum, yDenom )) != TRUE)
{
if(ret == GDI_NO_MORE_WORK)
ret = TRUE;
goto done;
}
}
if (size)
{
size->cx = dc->wndExtX;
size->cy = dc->wndExtY;
}
if ((dc->MapMode != MM_ISOTROPIC) && (dc->MapMode != MM_ANISOTROPIC))
goto done;
if (!xNum || !xDenom || !xNum || !yDenom)
{
ret = FALSE;
goto done;
}
dc->wndExtX = (dc->wndExtX * xNum) / xDenom;
dc->wndExtY = (dc->wndExtY * yNum) / yDenom;
if (dc->wndExtX == 0) dc->wndExtX = 1;
if (dc->wndExtY == 0) dc->wndExtY = 1;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
done:
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* SetVirtualResolution (GDI32.@)
*
* Undocumented on msdn.
*
* Changes the values of screen size in pixels and millimeters used by
* the mapping mode functions.
*
* PARAMS
* hdc [I] Device context
* horz_res [I] Width in pixels (equivalent to HORZRES device cap).
* vert_res [I] Height in pixels (equivalent to VERTRES device cap).
* horz_size [I] Width in mm (equivalent to HORZSIZE device cap).
* vert_size [I] Height in mm (equivalent to VERTSIZE device cap).
*
* RETURNS
* TRUE if successful.
* FALSE if any (but not all) of the last four params are zero.
*
* NOTES
* This doesn't change the values returned by GetDeviceCaps, just the
* scaling of the mapping modes.
*
* Calling with the last four params equal to zero sets the values
* back to their defaults obtained by calls to GetDeviceCaps.
*/
BOOL WINAPI SetVirtualResolution(HDC hdc, DWORD horz_res, DWORD vert_res,
DWORD horz_size, DWORD vert_size)
{
DC * dc;
TRACE("(%p %d %d %d %d)\n", hdc, horz_res, vert_res, horz_size, vert_size);
if(horz_res == 0 && vert_res == 0 && horz_size == 0 && vert_size == 0)
{
horz_res = GetDeviceCaps(hdc, HORZRES);
vert_res = GetDeviceCaps(hdc, VERTRES);
horz_size = GetDeviceCaps(hdc, HORZSIZE);
vert_size = GetDeviceCaps(hdc, VERTSIZE);
}
else if(horz_res == 0 || vert_res == 0 || horz_size == 0 || vert_size == 0)
return FALSE;
dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
dc->virtual_res.cx = horz_res;
dc->virtual_res.cy = vert_res;
dc->virtual_size.cx = horz_size;
dc->virtual_size.cy = vert_size;
release_dc_ptr( dc );
return TRUE;
}
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