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wine/dlls/gdi32/mapping.c
Huw Davies e1130cbb99 gdi32: Add an internal version of DPtoLP that takes a DC pointer. 
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2016-07-29 23:43:35 +09:00

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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 "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dc);
static SIZE get_dc_virtual_size( DC *dc )
{
SIZE ret = dc->virtual_size;
if (!ret.cx)
{
ret.cx = GetDeviceCaps( dc->hSelf, HORZSIZE );
ret.cy = GetDeviceCaps( dc->hSelf, VERTSIZE );
}
return ret;
}
static SIZE get_dc_virtual_res( DC *dc )
{
SIZE ret = dc->virtual_res;
if (!ret.cx)
{
ret.cx = GetDeviceCaps( dc->hSelf, HORZRES );
ret.cy = GetDeviceCaps( dc->hSelf, VERTRES );
}
return ret;
}
/***********************************************************************
* MAPPING_FixIsotropic
*
* Fix viewport extensions for isotropic mode.
*/
static void MAPPING_FixIsotropic( DC * dc )
{
SIZE virtual_size = get_dc_virtual_size( dc );
SIZE virtual_res = get_dc_virtual_res( dc );
double xdim = fabs((double)dc->vport_ext.cx * virtual_size.cx / (virtual_res.cx * dc->wnd_ext.cx));
double ydim = fabs((double)dc->vport_ext.cy * virtual_size.cy / (virtual_res.cy * dc->wnd_ext.cy));
if (xdim > ydim)
{
INT mincx = (dc->vport_ext.cx >= 0) ? 1 : -1;
dc->vport_ext.cx = floor(dc->vport_ext.cx * ydim / xdim + 0.5);
if (!dc->vport_ext.cx) dc->vport_ext.cx = mincx;
}
else
{
INT mincy = (dc->vport_ext.cy >= 0) ? 1 : -1;
dc->vport_ext.cy = floor(dc->vport_ext.cy * xdim / ydim + 0.5);
if (!dc->vport_ext.cy) dc->vport_ext.cy = mincy;
}
}
/***********************************************************************
* null driver fallback implementations
*/
BOOL nulldrv_OffsetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
{
DC *dc = get_nulldrv_dc( dev );
if (pt)
*pt = dc->vport_org;
dc->vport_org.x += x;
dc->vport_org.y += y;
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_OffsetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
{
DC *dc = get_nulldrv_dc( dev );
if (pt)
*pt = dc->wnd_org;
dc->wnd_org.x += x;
dc->wnd_org.y += y;
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_ScaleViewportExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size )
{
DC *dc = get_nulldrv_dc( dev );
if (size)
*size = dc->vport_ext;
if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
if (!x_num || !x_denom || !y_num || !y_denom) return FALSE;
dc->vport_ext.cx = (dc->vport_ext.cx * x_num) / x_denom;
dc->vport_ext.cy = (dc->vport_ext.cy * y_num) / y_denom;
if (dc->vport_ext.cx == 0) dc->vport_ext.cx = 1;
if (dc->vport_ext.cy == 0) dc->vport_ext.cy = 1;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_ScaleWindowExtEx( PHYSDEV dev, INT x_num, INT x_denom, INT y_num, INT y_denom, SIZE *size )
{
DC *dc = get_nulldrv_dc( dev );
if (size)
*size = dc->wnd_ext;
if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
if (!x_num || !x_denom || !y_num || !y_denom) return FALSE;
dc->wnd_ext.cx = (dc->wnd_ext.cx * x_num) / x_denom;
dc->wnd_ext.cy = (dc->wnd_ext.cy * y_num) / y_denom;
if (dc->wnd_ext.cx == 0) dc->wnd_ext.cx = 1;
if (dc->wnd_ext.cy == 0) dc->wnd_ext.cy = 1;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
return TRUE;
}
INT nulldrv_SetMapMode( PHYSDEV dev, INT mode )
{
DC *dc = get_nulldrv_dc( dev );
INT ret = dc->MapMode;
SIZE virtual_size, virtual_res;
if (mode == dc->MapMode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC)) return ret;
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
switch (mode)
{
case MM_TEXT:
dc->wnd_ext.cx = 1;
dc->wnd_ext.cy = 1;
dc->vport_ext.cx = 1;
dc->vport_ext.cy = 1;
break;
case MM_LOMETRIC:
case MM_ISOTROPIC:
dc->wnd_ext.cx = virtual_size.cx * 10;
dc->wnd_ext.cy = virtual_size.cy * 10;
dc->vport_ext.cx = virtual_res.cx;
dc->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIMETRIC:
dc->wnd_ext.cx = virtual_size.cx * 100;
dc->wnd_ext.cy = virtual_size.cy * 100;
dc->vport_ext.cx = virtual_res.cx;
dc->vport_ext.cy = -virtual_res.cy;
break;
case MM_LOENGLISH:
dc->wnd_ext.cx = MulDiv(1000, virtual_size.cx, 254);
dc->wnd_ext.cy = MulDiv(1000, virtual_size.cy, 254);
dc->vport_ext.cx = virtual_res.cx;
dc->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIENGLISH:
dc->wnd_ext.cx = MulDiv(10000, virtual_size.cx, 254);
dc->wnd_ext.cy = MulDiv(10000, virtual_size.cy, 254);
dc->vport_ext.cx = virtual_res.cx;
dc->vport_ext.cy = -virtual_res.cy;
break;
case MM_TWIPS:
dc->wnd_ext.cx = MulDiv(14400, virtual_size.cx, 254);
dc->wnd_ext.cy = MulDiv(14400, virtual_size.cy, 254);
dc->vport_ext.cx = virtual_res.cx;
dc->vport_ext.cy = -virtual_res.cy;
break;
case MM_ANISOTROPIC:
break;
default:
return 0;
}
/* RTL layout is always MM_ANISOTROPIC */
if (!(dc->layout & LAYOUT_RTL)) dc->MapMode = mode;
DC_UpdateXforms( dc );
return ret;
}
BOOL nulldrv_SetViewportExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size )
{
DC *dc = get_nulldrv_dc( dev );
if (size)
*size = dc->vport_ext;
if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
if (!cx || !cy) return FALSE;
dc->vport_ext.cx = cx;
dc->vport_ext.cy = cy;
if (dc->MapMode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_SetViewportOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
{
DC *dc = get_nulldrv_dc( dev );
if (pt)
*pt = dc->vport_org;
dc->vport_org.x = x;
dc->vport_org.y = y;
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_SetWindowExtEx( PHYSDEV dev, INT cx, INT cy, SIZE *size )
{
DC *dc = get_nulldrv_dc( dev );
if (size)
*size = dc->wnd_ext;
if (dc->MapMode != MM_ISOTROPIC && dc->MapMode != MM_ANISOTROPIC) return TRUE;
if (!cx || !cy) return FALSE;
dc->wnd_ext.cx = cx;
dc->wnd_ext.cy = cy;
/* 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 );
return TRUE;
}
BOOL nulldrv_SetWindowOrgEx( PHYSDEV dev, INT x, INT y, POINT *pt )
{
DC *dc = get_nulldrv_dc( dev );
if (pt)
*pt = dc->wnd_org;
dc->wnd_org.x = x;
dc->wnd_org.y = y;
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_ModifyWorldTransform( PHYSDEV dev, const XFORM *xform, DWORD mode )
{
DC *dc = get_nulldrv_dc( dev );
switch (mode)
{
case MWT_IDENTITY:
dc->xformWorld2Wnd.eM11 = 1.0f;
dc->xformWorld2Wnd.eM12 = 0.0f;
dc->xformWorld2Wnd.eM21 = 0.0f;
dc->xformWorld2Wnd.eM22 = 1.0f;
dc->xformWorld2Wnd.eDx = 0.0f;
dc->xformWorld2Wnd.eDy = 0.0f;
break;
case MWT_LEFTMULTIPLY:
CombineTransform( &dc->xformWorld2Wnd, xform, &dc->xformWorld2Wnd );
break;
case MWT_RIGHTMULTIPLY:
CombineTransform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd, xform );
break;
default:
return FALSE;
}
DC_UpdateXforms( dc );
return TRUE;
}
BOOL nulldrv_SetWorldTransform( PHYSDEV dev, const XFORM *xform )
{
DC *dc = get_nulldrv_dc( dev );
dc->xformWorld2Wnd = *xform;
DC_UpdateXforms( dc );
return TRUE;
}
/***********************************************************************
* dp_to_lp
*
* Internal version of DPtoLP that takes a DC *.
*/
BOOL dp_to_lp( DC *dc, POINT *points, INT count )
{
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++;
}
}
return (count < 0);
}
/***********************************************************************
* DPtoLP (GDI32.@)
*/
BOOL WINAPI DPtoLP( HDC hdc, POINT *points, INT count )
{
DC * dc = get_dc_ptr( hdc );
BOOL ret;
if (!dc) return FALSE;
ret = dp_to_lp( dc, points, count );
release_dc_ptr( dc );
return ret;
}
/***********************************************************************
* lp_to_dp
*
* Internal version of LPtoDP that takes a DC *.
*/
void lp_to_dp( DC *dc, POINT *points, INT count )
{
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++;
}
}
/***********************************************************************
* LPtoDP (GDI32.@)
*/
BOOL WINAPI LPtoDP( HDC hdc, POINT *points, INT count )
{
DC * dc = get_dc_ptr( hdc );
if (!dc) return FALSE;
lp_to_dp( dc, points, count );
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* SetMapMode (GDI32.@)
*/
INT WINAPI SetMapMode( HDC hdc, INT mode )
{
INT ret = 0;
DC * dc = get_dc_ptr( hdc );
TRACE("%p %d\n", hdc, mode );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetMapMode );
ret = physdev->funcs->pSetMapMode( physdev, mode );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetViewportExtEx (GDI32.@)
*/
BOOL WINAPI SetViewportExtEx( HDC hdc, INT x, INT y, LPSIZE size )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetViewportExtEx );
ret = physdev->funcs->pSetViewportExtEx( physdev, x, y, size );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetViewportOrgEx (GDI32.@)
*/
BOOL WINAPI SetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetViewportOrgEx );
ret = physdev->funcs->pSetViewportOrgEx( physdev, x, y, pt );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetWindowExtEx (GDI32.@)
*/
BOOL WINAPI SetWindowExtEx( HDC hdc, INT x, INT y, LPSIZE size )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWindowExtEx );
ret = physdev->funcs->pSetWindowExtEx( physdev, x, y, size );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetWindowOrgEx (GDI32.@)
*/
BOOL WINAPI SetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWindowOrgEx );
ret = physdev->funcs->pSetWindowOrgEx( physdev, x, y, pt );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* OffsetViewportOrgEx (GDI32.@)
*/
BOOL WINAPI OffsetViewportOrgEx( HDC hdc, INT x, INT y, LPPOINT pt)
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pOffsetViewportOrgEx );
ret = physdev->funcs->pOffsetViewportOrgEx( physdev, x, y, pt );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* OffsetWindowOrgEx (GDI32.@)
*/
BOOL WINAPI OffsetWindowOrgEx( HDC hdc, INT x, INT y, LPPOINT pt )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pOffsetWindowOrgEx );
ret = physdev->funcs->pOffsetWindowOrgEx( physdev, x, y, pt );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* ScaleViewportExtEx (GDI32.@)
*/
BOOL WINAPI ScaleViewportExtEx( HDC hdc, INT xNum, INT xDenom,
INT yNum, INT yDenom, LPSIZE size )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pScaleViewportExtEx );
ret = physdev->funcs->pScaleViewportExtEx( physdev, xNum, xDenom, yNum, yDenom, size );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* ScaleWindowExtEx (GDI32.@)
*/
BOOL WINAPI ScaleWindowExtEx( HDC hdc, INT xNum, INT xDenom,
INT yNum, INT yDenom, LPSIZE size )
{
BOOL ret = FALSE;
DC * dc = get_dc_ptr( hdc );
if (dc)
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pScaleWindowExtEx );
ret = physdev->funcs->pScaleWindowExtEx( physdev, xNum, xDenom, yNum, yDenom, size );
release_dc_ptr( dc );
}
return ret;
}
/****************************************************************************
* ModifyWorldTransform (GDI32.@)
*/
BOOL WINAPI ModifyWorldTransform( HDC hdc, const XFORM *xform, DWORD mode )
{
BOOL ret = FALSE;
DC *dc;
if (!xform && mode != MWT_IDENTITY) return FALSE;
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pModifyWorldTransform );
if (dc->GraphicsMode == GM_ADVANCED)
ret = physdev->funcs->pModifyWorldTransform( physdev, xform, mode );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetWorldTransform (GDI32.@)
*/
BOOL WINAPI SetWorldTransform( HDC hdc, const XFORM *xform )
{
BOOL ret = FALSE;
DC *dc;
if (!xform) return FALSE;
/* The transform must conform to (eM11 * eM22 != eM12 * eM21) requirement */
if (xform->eM11 * xform->eM22 == xform->eM12 * xform->eM21) return FALSE;
TRACE("eM11 %f eM12 %f eM21 %f eM22 %f eDx %f eDy %f\n",
xform->eM11, xform->eM12, xform->eM21, xform->eM22, xform->eDx, xform->eDy);
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetWorldTransform );
if (dc->GraphicsMode == GM_ADVANCED)
ret = physdev->funcs->pSetWorldTransform( physdev, xform );
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 || !vert_res || !horz_size || !vert_size)
{
/* they must be all zero */
if (horz_res || vert_res || horz_size || vert_size) 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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