471 lines
15 KiB
C
471 lines
15 KiB
C
/*
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* GDI mapping mode functions
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*
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* Copyright 1993 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "ntgdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dc);
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/* copied from kernelbase */
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int muldiv( int a, int b, int c )
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{
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LONGLONG ret;
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if (!c) return -1;
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/* We want to deal with a positive divisor to simplify the logic. */
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if (c < 0)
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{
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a = -a;
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c = -c;
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}
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/* If the result is positive, we "add" to round. else, we subtract to round. */
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if ((a < 0 && b < 0) || (a >= 0 && b >= 0))
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ret = (((LONGLONG)a * b) + (c / 2)) / c;
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else
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ret = (((LONGLONG)a * b) - (c / 2)) / c;
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if (ret > 2147483647 || ret < -2147483647) return -1;
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return ret;
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}
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static SIZE get_dc_virtual_size( DC *dc )
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{
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SIZE ret = dc->attr->virtual_size;
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if (!ret.cx)
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{
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ret.cx = NtGdiGetDeviceCaps( dc->hSelf, HORZSIZE );
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ret.cy = NtGdiGetDeviceCaps( dc->hSelf, VERTSIZE );
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}
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return ret;
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}
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static SIZE get_dc_virtual_res( DC *dc )
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{
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SIZE ret = dc->attr->virtual_res;
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if (!ret.cx)
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{
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ret.cx = NtGdiGetDeviceCaps( dc->hSelf, HORZRES );
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ret.cy = NtGdiGetDeviceCaps( dc->hSelf, VERTRES );
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}
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return ret;
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}
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/***********************************************************************
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* MAPPING_FixIsotropic
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*
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* Fix viewport extensions for isotropic mode.
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*/
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static void MAPPING_FixIsotropic( DC * dc )
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{
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SIZE virtual_size = get_dc_virtual_size( dc );
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SIZE virtual_res = get_dc_virtual_res( dc );
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double xdim = fabs((double)dc->attr->vport_ext.cx * virtual_size.cx /
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(virtual_res.cx * dc->attr->wnd_ext.cx));
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double ydim = fabs((double)dc->attr->vport_ext.cy * virtual_size.cy /
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(virtual_res.cy * dc->attr->wnd_ext.cy));
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if (xdim > ydim)
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{
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INT mincx = (dc->attr->vport_ext.cx >= 0) ? 1 : -1;
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dc->attr->vport_ext.cx = GDI_ROUND( dc->attr->vport_ext.cx * ydim / xdim );
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if (!dc->attr->vport_ext.cx) dc->attr->vport_ext.cx = mincx;
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}
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else
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{
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INT mincy = (dc->attr->vport_ext.cy >= 0) ? 1 : -1;
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dc->attr->vport_ext.cy = GDI_ROUND( dc->attr->vport_ext.cy * xdim / ydim );
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if (!dc->attr->vport_ext.cy) dc->attr->vport_ext.cy = mincy;
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}
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}
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BOOL set_map_mode( DC *dc, int mode )
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{
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SIZE virtual_size, virtual_res;
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if (mode == dc->attr->map_mode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
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return TRUE;
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switch (mode)
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{
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case MM_TEXT:
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dc->attr->wnd_ext.cx = 1;
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dc->attr->wnd_ext.cy = 1;
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dc->attr->vport_ext.cx = 1;
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dc->attr->vport_ext.cy = 1;
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break;
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case MM_LOMETRIC:
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case MM_ISOTROPIC:
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virtual_size = get_dc_virtual_size( dc );
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virtual_res = get_dc_virtual_res( dc );
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dc->attr->wnd_ext.cx = virtual_size.cx * 10;
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dc->attr->wnd_ext.cy = virtual_size.cy * 10;
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dc->attr->vport_ext.cx = virtual_res.cx;
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dc->attr->vport_ext.cy = -virtual_res.cy;
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break;
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case MM_HIMETRIC:
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virtual_size = get_dc_virtual_size( dc );
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virtual_res = get_dc_virtual_res( dc );
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dc->attr->wnd_ext.cx = virtual_size.cx * 100;
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dc->attr->wnd_ext.cy = virtual_size.cy * 100;
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dc->attr->vport_ext.cx = virtual_res.cx;
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dc->attr->vport_ext.cy = -virtual_res.cy;
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break;
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case MM_LOENGLISH:
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virtual_size = get_dc_virtual_size( dc );
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virtual_res = get_dc_virtual_res( dc );
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dc->attr->wnd_ext.cx = muldiv(1000, virtual_size.cx, 254);
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dc->attr->wnd_ext.cy = muldiv(1000, virtual_size.cy, 254);
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dc->attr->vport_ext.cx = virtual_res.cx;
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dc->attr->vport_ext.cy = -virtual_res.cy;
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break;
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case MM_HIENGLISH:
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virtual_size = get_dc_virtual_size( dc );
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virtual_res = get_dc_virtual_res( dc );
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dc->attr->wnd_ext.cx = muldiv(10000, virtual_size.cx, 254);
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dc->attr->wnd_ext.cy = muldiv(10000, virtual_size.cy, 254);
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dc->attr->vport_ext.cx = virtual_res.cx;
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dc->attr->vport_ext.cy = -virtual_res.cy;
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break;
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case MM_TWIPS:
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virtual_size = get_dc_virtual_size( dc );
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virtual_res = get_dc_virtual_res( dc );
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dc->attr->wnd_ext.cx = muldiv(14400, virtual_size.cx, 254);
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dc->attr->wnd_ext.cy = muldiv(14400, virtual_size.cy, 254);
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dc->attr->vport_ext.cx = virtual_res.cx;
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dc->attr->vport_ext.cy = -virtual_res.cy;
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break;
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case MM_ANISOTROPIC:
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break;
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default:
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return FALSE;
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}
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/* RTL layout is always MM_ANISOTROPIC */
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if (!(dc->attr->layout & LAYOUT_RTL)) dc->attr->map_mode = mode;
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DC_UpdateXforms( dc );
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return TRUE;
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}
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/***********************************************************************
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* dp_to_lp
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*
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* Internal version of DPtoLP that takes a DC *.
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*/
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BOOL dp_to_lp( DC *dc, POINT *points, INT count )
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{
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if (dc->vport2WorldValid)
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{
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while (count--)
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{
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double x = points->x;
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double y = points->y;
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points->x = GDI_ROUND( x * dc->xformVport2World.eM11 +
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y * dc->xformVport2World.eM21 +
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dc->xformVport2World.eDx );
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points->y = GDI_ROUND( x * dc->xformVport2World.eM12 +
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y * dc->xformVport2World.eM22 +
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dc->xformVport2World.eDy );
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points++;
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}
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}
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return (count < 0);
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}
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/***********************************************************************
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* NtGdiTransformPoints (win32u.@)
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*/
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BOOL WINAPI NtGdiTransformPoints( HDC hdc, const POINT *points_in, POINT *points_out,
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INT count, UINT mode )
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{
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DC *dc = get_dc_ptr( hdc );
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int i = 0;
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BOOL ret = FALSE;
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if (!dc) return FALSE;
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switch (mode)
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{
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case NtGdiLPtoDP:
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for (i = 0; i < count; i++)
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{
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double x = points_in[i].x;
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double y = points_in[i].y;
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points_out[i].x = GDI_ROUND( x * dc->xformWorld2Vport.eM11 +
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y * dc->xformWorld2Vport.eM21 +
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dc->xformWorld2Vport.eDx );
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points_out[i].y = GDI_ROUND( x * dc->xformWorld2Vport.eM12 +
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y * dc->xformWorld2Vport.eM22 +
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dc->xformWorld2Vport.eDy );
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}
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ret = TRUE;
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break;
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case NtGdiDPtoLP:
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if (!dc->vport2WorldValid) break;
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for (i = 0; i < count; i++)
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{
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double x = points_in[i].x;
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double y = points_in[i].y;
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points_out[i].x = GDI_ROUND( x * dc->xformVport2World.eM11 +
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y * dc->xformVport2World.eM21 +
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dc->xformVport2World.eDx );
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points_out[i].y = GDI_ROUND( x * dc->xformVport2World.eM12 +
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y * dc->xformVport2World.eM22 +
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dc->xformVport2World.eDy );
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}
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ret = TRUE;
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break;
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default:
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WARN( "invalid mode %x\n", mode );
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break;
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}
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* lp_to_dp
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*
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* Internal version of LPtoDP that takes a DC *.
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*/
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void lp_to_dp( DC *dc, POINT *points, INT count )
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{
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while (count--)
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{
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double x = points->x;
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double y = points->y;
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points->x = GDI_ROUND( x * dc->xformWorld2Vport.eM11 +
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y * dc->xformWorld2Vport.eM21 +
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dc->xformWorld2Vport.eDx );
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points->y = GDI_ROUND( x * dc->xformWorld2Vport.eM12 +
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y * dc->xformWorld2Vport.eM22 +
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dc->xformWorld2Vport.eDy );
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points++;
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}
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}
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/***********************************************************************
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* NtGdiComputeXformCoefficients (win32u.@)
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*/
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BOOL WINAPI NtGdiComputeXformCoefficients( HDC hdc )
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{
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DC *dc;
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if (!(dc = get_dc_ptr( hdc ))) return FALSE;
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if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
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DC_UpdateXforms( dc );
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release_dc_ptr( dc );
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return TRUE;
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}
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/***********************************************************************
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* NtGdiScaleViewportExtEx (win32u.@)
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*/
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BOOL WINAPI NtGdiScaleViewportExtEx( HDC hdc, INT x_num, INT x_denom,
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INT y_num, INT y_denom, SIZE *size )
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{
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DC *dc;
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if ((!(dc = get_dc_ptr( hdc )))) return FALSE;
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if (size) *size = dc->attr->vport_ext;
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if (dc->attr->map_mode == MM_ISOTROPIC || dc->attr->map_mode == MM_ANISOTROPIC)
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{
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if (!x_num || !x_denom || !y_num || !y_denom)
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{
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release_dc_ptr( dc );
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return FALSE;
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}
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dc->attr->vport_ext.cx = (dc->attr->vport_ext.cx * x_num) / x_denom;
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dc->attr->vport_ext.cy = (dc->attr->vport_ext.cy * y_num) / y_denom;
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if (dc->attr->vport_ext.cx == 0) dc->attr->vport_ext.cx = 1;
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if (dc->attr->vport_ext.cy == 0) dc->attr->vport_ext.cy = 1;
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if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
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DC_UpdateXforms( dc );
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}
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release_dc_ptr( dc );
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return TRUE;
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}
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/***********************************************************************
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* NtGdiScaleWindowExtEx (win32u.@)
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*/
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BOOL WINAPI NtGdiScaleWindowExtEx( HDC hdc, INT x_num, INT x_denom,
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INT y_num, INT y_denom, SIZE *size )
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{
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DC *dc;
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if ((!(dc = get_dc_ptr( hdc )))) return FALSE;
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if (size) *size = dc->attr->wnd_ext;
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if (dc->attr->map_mode == MM_ISOTROPIC || dc->attr->map_mode == MM_ANISOTROPIC)
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{
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if (!x_num || !x_denom || !y_num || !y_denom)
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{
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release_dc_ptr( dc );
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return FALSE;
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}
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dc->attr->wnd_ext.cx = (dc->attr->wnd_ext.cx * x_num) / x_denom;
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dc->attr->wnd_ext.cy = (dc->attr->wnd_ext.cy * y_num) / y_denom;
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if (dc->attr->wnd_ext.cx == 0) dc->attr->wnd_ext.cx = 1;
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if (dc->attr->wnd_ext.cy == 0) dc->attr->wnd_ext.cy = 1;
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if (dc->attr->map_mode == MM_ISOTROPIC) MAPPING_FixIsotropic( dc );
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DC_UpdateXforms( dc );
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}
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release_dc_ptr( dc );
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return TRUE;
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}
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/****************************************************************************
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* NtGdiModifyWorldTransform (win32u.@)
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*/
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BOOL WINAPI NtGdiModifyWorldTransform( HDC hdc, const XFORM *xform, DWORD mode )
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{
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BOOL ret = FALSE;
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DC *dc;
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if (!xform && mode != MWT_IDENTITY) return FALSE;
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if ((dc = get_dc_ptr( hdc )))
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{
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switch (mode)
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{
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case MWT_IDENTITY:
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dc->xformWorld2Wnd.eM11 = 1.0f;
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dc->xformWorld2Wnd.eM12 = 0.0f;
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dc->xformWorld2Wnd.eM21 = 0.0f;
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dc->xformWorld2Wnd.eM22 = 1.0f;
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dc->xformWorld2Wnd.eDx = 0.0f;
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dc->xformWorld2Wnd.eDy = 0.0f;
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ret = TRUE;
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break;
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case MWT_LEFTMULTIPLY:
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combine_transform( &dc->xformWorld2Wnd, xform, &dc->xformWorld2Wnd );
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ret = TRUE;
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break;
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case MWT_RIGHTMULTIPLY:
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combine_transform( &dc->xformWorld2Wnd, &dc->xformWorld2Wnd, xform );
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ret = TRUE;
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break;
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case MWT_SET:
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ret = dc->attr->graphics_mode == GM_ADVANCED &&
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xform->eM11 * xform->eM22 != xform->eM12 * xform->eM21;
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if (ret) dc->xformWorld2Wnd = *xform;
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break;
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}
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if (ret) DC_UpdateXforms( dc );
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* NtGdiSetVirtualResolution (win32u.@)
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*
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* Undocumented on msdn.
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*
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* Changes the values of screen size in pixels and millimeters used by
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* the mapping mode functions.
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*
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* PARAMS
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* hdc [I] Device context
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* horz_res [I] Width in pixels (equivalent to HORZRES device cap).
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* vert_res [I] Height in pixels (equivalent to VERTRES device cap).
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* horz_size [I] Width in mm (equivalent to HORZSIZE device cap).
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* vert_size [I] Height in mm (equivalent to VERTSIZE device cap).
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*
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* RETURNS
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* TRUE if successful.
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* FALSE if any (but not all) of the last four params are zero.
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*
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* NOTES
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* This doesn't change the values returned by NtGdiGetDeviceCaps, just the
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* scaling of the mapping modes.
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*
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* Calling with the last four params equal to zero sets the values
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* back to their defaults obtained by calls to NtGdiGetDeviceCaps.
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*/
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BOOL WINAPI NtGdiSetVirtualResolution( HDC hdc, DWORD horz_res, DWORD vert_res,
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DWORD horz_size, DWORD vert_size )
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{
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DC * dc;
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TRACE("(%p %d %d %d %d)\n", hdc, horz_res, vert_res, horz_size, vert_size);
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if (!horz_res || !vert_res || !horz_size || !vert_size)
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{
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/* they must be all zero */
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if (horz_res || vert_res || horz_size || vert_size) return FALSE;
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}
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dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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dc->attr->virtual_res.cx = horz_res;
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dc->attr->virtual_res.cy = vert_res;
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dc->attr->virtual_size.cx = horz_size;
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dc->attr->virtual_size.cy = vert_size;
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release_dc_ptr( dc );
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return TRUE;
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}
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void combine_transform( XFORM *result, const XFORM *xform1, const XFORM *xform2 )
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{
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XFORM r;
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/* Create the result in a temporary XFORM, since result may be
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* equal to xform1 or xform2 */
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r.eM11 = xform1->eM11 * xform2->eM11 + xform1->eM12 * xform2->eM21;
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r.eM12 = xform1->eM11 * xform2->eM12 + xform1->eM12 * xform2->eM22;
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r.eM21 = xform1->eM21 * xform2->eM11 + xform1->eM22 * xform2->eM21;
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r.eM22 = xform1->eM21 * xform2->eM12 + xform1->eM22 * xform2->eM22;
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r.eDx = xform1->eDx * xform2->eM11 + xform1->eDy * xform2->eM21 + xform2->eDx;
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r.eDy = xform1->eDx * xform2->eM12 + xform1->eDy * xform2->eM22 + xform2->eDy;
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*result = r;
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}
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