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Sweden-Number/dlls/gdi32/mapping.c

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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 "ntgdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dc);
/* copied from kernelbase */
int muldiv( int a, int b, int c )
{
LONGLONG ret;
if (!c) return -1;
/* We want to deal with a positive divisor to simplify the logic. */
if (c < 0)
{
a = -a;
c = -c;
}
/* If the result is positive, we "add" to round. else, we subtract to round. */
if ((a < 0 && b < 0) || (a >= 0 && b >= 0))
ret = (((LONGLONG)a * b) + (c / 2)) / c;
else
ret = (((LONGLONG)a * b) - (c / 2)) / c;
if (ret > 2147483647 || ret < -2147483647) return -1;
return ret;
}
static SIZE get_dc_virtual_size( DC *dc )
{
SIZE ret = dc->attr->virtual_size;
if (!ret.cx)
{
ret.cx = NtGdiGetDeviceCaps( dc->hSelf, HORZSIZE );
ret.cy = NtGdiGetDeviceCaps( dc->hSelf, VERTSIZE );
}
return ret;
}
static SIZE get_dc_virtual_res( DC *dc )
{
SIZE ret = dc->attr->virtual_res;
if (!ret.cx)
{
ret.cx = NtGdiGetDeviceCaps( dc->hSelf, HORZRES );
ret.cy = NtGdiGetDeviceCaps( 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->attr->vport_ext.cx * virtual_size.cx /
(virtual_res.cx * dc->attr->wnd_ext.cx));
double ydim = fabs((double)dc->attr->vport_ext.cy * virtual_size.cy /
(virtual_res.cy * dc->attr->wnd_ext.cy));
if (xdim > ydim)
{
INT mincx = (dc->attr->vport_ext.cx >= 0) ? 1 : -1;
dc->attr->vport_ext.cx = floor(dc->attr->vport_ext.cx * ydim / xdim + 0.5);
if (!dc->attr->vport_ext.cx) dc->attr->vport_ext.cx = mincx;
}
else
{
INT mincy = (dc->attr->vport_ext.cy >= 0) ? 1 : -1;
dc->attr->vport_ext.cy = floor(dc->attr->vport_ext.cy * xdim / ydim + 0.5);
if (!dc->attr->vport_ext.cy) dc->attr->vport_ext.cy = mincy;
}
}
BOOL set_map_mode( DC *dc, int mode )
{
SIZE virtual_size, virtual_res;
if (mode == dc->attr->map_mode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
return TRUE;
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
switch (mode)
{
case MM_TEXT:
dc->attr->wnd_ext.cx = 1;
dc->attr->wnd_ext.cy = 1;
dc->attr->vport_ext.cx = 1;
dc->attr->vport_ext.cy = 1;
break;
case MM_LOMETRIC:
case MM_ISOTROPIC:
dc->attr->wnd_ext.cx = virtual_size.cx * 10;
dc->attr->wnd_ext.cy = virtual_size.cy * 10;
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIMETRIC:
dc->attr->wnd_ext.cx = virtual_size.cx * 100;
dc->attr->wnd_ext.cy = virtual_size.cy * 100;
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_LOENGLISH:
dc->attr->wnd_ext.cx = muldiv(1000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(1000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIENGLISH:
dc->attr->wnd_ext.cx = muldiv(10000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(10000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_TWIPS:
dc->attr->wnd_ext.cx = muldiv(14400, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(14400, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_ANISOTROPIC:
break;
default:
return FALSE;
}
/* RTL layout is always MM_ANISOTROPIC */
if (!(dc->attr->layout & LAYOUT_RTL)) dc->attr->map_mode = mode;
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);
}
/***********************************************************************
* NtGdiTransformPoints (win32u.@)
*/
BOOL WINAPI NtGdiTransformPoints( HDC hdc, const POINT *points_in, POINT *points_out,
INT count, UINT mode )
{
DC *dc = get_dc_ptr( hdc );
int i = 0;
BOOL ret = FALSE;
if (!dc) return FALSE;
switch (mode)
{
case NtGdiLPtoDP:
for (i = 0; i < count; i++)
{
double x = points_in[i].x;
double y = points_in[i].y;
points_out[i].x = floor( x * dc->xformWorld2Vport.eM11 +
y * dc->xformWorld2Vport.eM21 +
dc->xformWorld2Vport.eDx + 0.5 );
points_out[i].y = floor( x * dc->xformWorld2Vport.eM12 +
y * dc->xformWorld2Vport.eM22 +
dc->xformWorld2Vport.eDy + 0.5 );
}
ret = TRUE;
break;
case NtGdiDPtoLP:
if (!dc->vport2WorldValid) break;
for (i = 0; i < count; i++)
{
double x = points_in[i].x;
double y = points_in[i].y;
points_out[i].x = floor( x * dc->xformVport2World.eM11 +
y * dc->xformVport2World.eM21 +
dc->xformVport2World.eDx + 0.5 );
points_out[i].y = floor( x * dc->xformVport2World.eM12 +
y * dc->xformVport2World.eM22 +
dc->xformVport2World.eDy + 0.5 );
}
ret = TRUE;
break;
default:
WARN( "invalid mode %x\n", mode );
break;
}
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++;
}
}
/***********************************************************************
* NtGdiComputeXformCoefficients (win32u.@)
*/
BOOL WINAPI NtGdiComputeXformCoefficients( HDC hdc )
{
DC *dc;
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* NtGdiScaleViewportExtEx (win32u.@)
*/
BOOL WINAPI NtGdiScaleViewportExtEx( HDC hdc, INT x_num, INT x_denom,
INT y_num, INT y_denom, SIZE *size )
{
DC *dc;
if ((!(dc = get_dc_ptr( hdc )))) return FALSE;
if (size) *size = dc->attr->vport_ext;
if (dc->attr->map_mode == MM_ISOTROPIC || dc->attr->map_mode == MM_ANISOTROPIC)
{
if (!x_num || !x_denom || !y_num || !y_denom)
{
release_dc_ptr( dc );
return FALSE;
}
dc->attr->vport_ext.cx = (dc->attr->vport_ext.cx * x_num) / x_denom;
dc->attr->vport_ext.cy = (dc->attr->vport_ext.cy * y_num) / y_denom;
if (dc->attr->vport_ext.cx == 0) dc->attr->vport_ext.cx = 1;
if (dc->attr->vport_ext.cy == 0) dc->attr->vport_ext.cy = 1;
if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
}
release_dc_ptr( dc );
return TRUE;
}
/***********************************************************************
* NtGdiScaleWindowExtEx (win32u.@)
*/
BOOL WINAPI NtGdiScaleWindowExtEx( HDC hdc, INT x_num, INT x_denom,
INT y_num, INT y_denom, SIZE *size )
{
DC *dc;
if ((!(dc = get_dc_ptr( hdc )))) return FALSE;
if (size) *size = dc->attr->wnd_ext;
if (dc->attr->map_mode == MM_ISOTROPIC || dc->attr->map_mode == MM_ANISOTROPIC)
{
if (!x_num || !x_denom || !y_num || !y_denom)
{
release_dc_ptr( dc );
return FALSE;
}
dc->attr->wnd_ext.cx = (dc->attr->wnd_ext.cx * x_num) / x_denom;
dc->attr->wnd_ext.cy = (dc->attr->wnd_ext.cy * y_num) / y_denom;
if (dc->attr->wnd_ext.cx == 0) dc->attr->wnd_ext.cx = 1;
if (dc->attr->wnd_ext.cy == 0) dc->attr->wnd_ext.cy = 1;
if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
DC_UpdateXforms( dc );
}
release_dc_ptr( dc );
return TRUE;
}
/****************************************************************************
* NtGdiModifyWorldTransform (win32u.@)
*/
BOOL WINAPI NtGdiModifyWorldTransform( 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 )))
{
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;
ret = TRUE;
break;
case MWT_LEFTMULTIPLY:
combine_transform( &dc->xformWorld2Wnd, xform, &dc->xformWorld2Wnd );
ret = TRUE;
break;
case MWT_RIGHTMULTIPLY:
combine_transform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd, xform );
ret = TRUE;
break;
case MWT_SET:
ret = dc->attr->graphics_mode == GM_ADVANCED &&
xform->eM11 * xform->eM22 != xform->eM12 * xform->eM21;
if (ret) dc->xformWorld2Wnd = *xform;
break;
}
if (ret) DC_UpdateXforms( dc );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* NtGdiSetVirtualResolution (win32u.@)
*
* 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 NtGdiGetDeviceCaps, 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 NtGdiGetDeviceCaps.
*/
BOOL WINAPI NtGdiSetVirtualResolution( 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->attr->virtual_res.cx = horz_res;
dc->attr->virtual_res.cy = vert_res;
dc->attr->virtual_size.cx = horz_size;
dc->attr->virtual_size.cy = vert_size;
release_dc_ptr( dc );
return TRUE;
}
void combine_transform( XFORM *result, const XFORM *xform1, const XFORM *xform2 )
{
XFORM r;
/* Create the result in a temporary XFORM, since result may be
* equal to xform1 or xform2 */
r.eM11 = xform1->eM11 * xform2->eM11 + xform1->eM12 * xform2->eM21;
r.eM12 = xform1->eM11 * xform2->eM12 + xform1->eM12 * xform2->eM22;
r.eM21 = xform1->eM21 * xform2->eM11 + xform1->eM22 * xform2->eM21;
r.eM22 = xform1->eM21 * xform2->eM12 + xform1->eM22 * xform2->eM22;
r.eDx = xform1->eDx * xform2->eM11 + xform1->eDy * xform2->eM21 + xform2->eDx;
r.eDy = xform1->eDx * xform2->eM12 + xform1->eDy * xform2->eM22 + xform2->eDy;
*result = r;
}
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