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![Jacek Caban](/assets/img/avatar_default.png)
Signed-off-by: Jacek Caban <jacek@codeweavers.com> Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
897 lines
27 KiB
C
897 lines
27 KiB
C
/*
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* GDI drawing functions.
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*
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* Copyright 1993, 1994 Alexandre Julliard
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* Copyright 1997 Bertho A. Stultiens
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* 1999 Huw D M Davies
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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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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.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 "winerror.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(gdi);
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/***********************************************************************
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* null driver fallback implementations
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*/
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BOOL CDECL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep )
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{
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INT x1 = GDI_ROUND( x + cos( start * M_PI / 180 ) * radius );
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INT y1 = GDI_ROUND( y - sin( start * M_PI / 180 ) * radius );
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INT x2 = GDI_ROUND( x + cos( (start + sweep) * M_PI / 180) * radius );
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INT y2 = GDI_ROUND( y - sin( (start + sweep) * M_PI / 180) * radius );
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INT arcdir = SetArcDirection( dev->hdc, sweep >= 0 ? AD_COUNTERCLOCKWISE : AD_CLOCKWISE );
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BOOL ret = ArcTo( dev->hdc, x - radius, y - radius, x + radius, y + radius, x1, y1, x2, y2 );
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SetArcDirection( dev->hdc, arcdir );
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return ret;
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}
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BOOL CDECL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
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INT xstart, INT ystart, INT xend, INT yend )
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{
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INT width = abs( right - left );
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INT height = abs( bottom - top );
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double xradius = width / 2.0;
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double yradius = height / 2.0;
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double xcenter = right > left ? left + xradius : right + xradius;
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double ycenter = bottom > top ? top + yradius : bottom + yradius;
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double angle;
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if (!height || !width) return FALSE;
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/* draw a line from the current position to the starting point of the arc, then draw the arc */
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angle = atan2( (ystart - ycenter) / height, (xstart - xcenter) / width );
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LineTo( dev->hdc, GDI_ROUND( xcenter + cos(angle) * xradius ),
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GDI_ROUND( ycenter + sin(angle) * yradius ));
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return Arc( dev->hdc, left, top, right, bottom, xstart, ystart, xend, yend );
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}
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BOOL CDECL nulldrv_FillRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush )
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{
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BOOL ret = FALSE;
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HBRUSH prev;
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if ((prev = NtGdiSelectBrush( dev->hdc, brush )))
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{
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PHYSDEV physdev = GET_DC_PHYSDEV( get_physdev_dc( dev ), pPaintRgn );
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ret = physdev->funcs->pPaintRgn( physdev, rgn );
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NtGdiSelectBrush( dev->hdc, prev );
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}
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return ret;
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}
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BOOL CDECL nulldrv_FrameRgn( PHYSDEV dev, HRGN rgn, HBRUSH brush, INT width, INT height )
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{
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BOOL ret = FALSE;
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HRGN tmp = NtGdiCreateRectRgn( 0, 0, 0, 0 );
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if (tmp)
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{
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if (REGION_FrameRgn( tmp, rgn, width, height ))
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ret = NtGdiFillRgn( dev->hdc, tmp, brush );
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NtGdiDeleteObjectApp( tmp );
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}
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return ret;
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}
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BOOL CDECL nulldrv_InvertRgn( PHYSDEV dev, HRGN rgn )
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{
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INT prev_rop = SetROP2( dev->hdc, R2_NOT );
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BOOL ret = NtGdiFillRgn( dev->hdc, rgn, get_stock_object(BLACK_BRUSH) );
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SetROP2( dev->hdc, prev_rop );
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return ret;
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}
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static BOOL polyline( HDC hdc, const POINT *points, UINT count )
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{
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return NtGdiPolyPolyDraw( hdc, points, &count, 1, NtGdiPolyPolyline );
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}
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BOOL CDECL nulldrv_PolyBezier( PHYSDEV dev, const POINT *points, DWORD count )
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{
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BOOL ret = FALSE;
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POINT *pts;
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INT n;
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if ((pts = GDI_Bezier( points, count, &n )))
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{
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ret = polyline( dev->hdc, pts, n );
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HeapFree( GetProcessHeap(), 0, pts );
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}
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return ret;
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}
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BOOL CDECL nulldrv_PolyBezierTo( PHYSDEV dev, const POINT *points, DWORD count )
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{
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DC *dc = get_nulldrv_dc( dev );
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BOOL ret = FALSE;
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POINT *pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) );
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if (pts)
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{
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pts[0] = dc->attr->cur_pos;
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memcpy( pts + 1, points, sizeof(POINT) * count );
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count++;
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ret = NtGdiPolyPolyDraw( dev->hdc, pts, &count, 1, NtGdiPolyBezier );
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HeapFree( GetProcessHeap(), 0, pts );
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}
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return ret;
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}
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BOOL CDECL nulldrv_PolyDraw( PHYSDEV dev, const POINT *points, const BYTE *types, DWORD count )
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{
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DC *dc = get_nulldrv_dc( dev );
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POINT *line_pts = NULL, *bzr_pts = NULL, bzr[4];
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DWORD i;
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INT num_pts, num_bzr_pts, space, size;
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/* check for valid point types */
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for (i = 0; i < count; i++)
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{
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switch (types[i])
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{
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case PT_MOVETO:
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case PT_LINETO | PT_CLOSEFIGURE:
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case PT_LINETO:
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break;
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case PT_BEZIERTO:
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if (i + 2 >= count) return FALSE;
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if (types[i + 1] != PT_BEZIERTO) return FALSE;
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if ((types[i + 2] & ~PT_CLOSEFIGURE) != PT_BEZIERTO) return FALSE;
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i += 2;
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break;
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default:
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return FALSE;
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}
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}
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space = count + 300;
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line_pts = HeapAlloc( GetProcessHeap(), 0, space * sizeof(POINT) );
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num_pts = 1;
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line_pts[0] = dc->attr->cur_pos;
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for (i = 0; i < count; i++)
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{
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switch (types[i])
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{
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case PT_MOVETO:
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if (num_pts >= 2) polyline( dev->hdc, line_pts, num_pts );
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num_pts = 0;
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line_pts[num_pts++] = points[i];
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break;
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case PT_LINETO:
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case (PT_LINETO | PT_CLOSEFIGURE):
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line_pts[num_pts++] = points[i];
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break;
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case PT_BEZIERTO:
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bzr[0].x = line_pts[num_pts - 1].x;
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bzr[0].y = line_pts[num_pts - 1].y;
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memcpy( &bzr[1], &points[i], 3 * sizeof(POINT) );
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if ((bzr_pts = GDI_Bezier( bzr, 4, &num_bzr_pts )))
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{
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size = num_pts + (count - i) + num_bzr_pts;
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if (space < size)
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{
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space = size * 2;
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line_pts = HeapReAlloc( GetProcessHeap(), 0, line_pts, space * sizeof(POINT) );
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}
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memcpy( &line_pts[num_pts], &bzr_pts[1], (num_bzr_pts - 1) * sizeof(POINT) );
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num_pts += num_bzr_pts - 1;
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HeapFree( GetProcessHeap(), 0, bzr_pts );
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}
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i += 2;
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break;
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}
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if (types[i] & PT_CLOSEFIGURE) line_pts[num_pts++] = line_pts[0];
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}
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if (num_pts >= 2) polyline( dev->hdc, line_pts, num_pts );
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HeapFree( GetProcessHeap(), 0, line_pts );
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return TRUE;
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}
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BOOL CDECL nulldrv_PolylineTo( PHYSDEV dev, const POINT *points, INT count )
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{
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DC *dc = get_nulldrv_dc( dev );
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BOOL ret = FALSE;
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POINT *pts;
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if (!count) return FALSE;
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if ((pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (count + 1) )))
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{
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pts[0] = dc->attr->cur_pos;
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memcpy( pts + 1, points, sizeof(POINT) * count );
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ret = polyline( dev->hdc, pts, count + 1 );
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HeapFree( GetProcessHeap(), 0, pts );
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}
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return ret;
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}
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/***********************************************************************
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* NtGdiLineTo (win32u.@)
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*/
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BOOL WINAPI NtGdiLineTo( HDC hdc, INT x, INT y )
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{
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DC * dc = get_dc_ptr( hdc );
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PHYSDEV physdev;
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BOOL ret;
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if(!dc) return FALSE;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pLineTo );
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ret = physdev->funcs->pLineTo( physdev, x, y );
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if(ret)
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{
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dc->attr->cur_pos.x = x;
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dc->attr->cur_pos.y = y;
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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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* NtGdiMoveTo (win32u.@)
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*/
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BOOL WINAPI NtGdiMoveTo( HDC hdc, INT x, INT y, POINT *pt )
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{
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BOOL ret;
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PHYSDEV physdev;
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DC * dc = get_dc_ptr( hdc );
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if(!dc) return FALSE;
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if(pt)
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*pt = dc->attr->cur_pos;
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dc->attr->cur_pos.x = x;
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dc->attr->cur_pos.y = y;
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physdev = GET_DC_PHYSDEV( dc, pMoveTo );
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ret = physdev->funcs->pMoveTo( physdev, x, y );
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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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* NtGdiArcInternal (win32u.@)
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*/
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BOOL WINAPI NtGdiArcInternal( UINT type, HDC hdc, INT left, INT top, INT right,
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INT bottom, INT xstart, INT ystart, INT xend, INT yend )
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{
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PHYSDEV physdev;
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BOOL ret;
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DC *dc;
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if (!(dc = get_dc_ptr( hdc ))) return FALSE;
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update_dc( dc );
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switch (type)
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{
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case NtGdiArc:
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physdev = GET_DC_PHYSDEV( dc, pArc );
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ret = physdev->funcs->pArc( physdev, left, top, right, bottom, xstart, ystart, xend, yend );
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break;
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case NtGdiArcTo:
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{
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double width = abs( right - left );
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double height = abs( bottom - top );
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double xradius = width / 2;
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double yradius = height / 2;
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double xcenter = right > left ? left + xradius : right + xradius;
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double ycenter = bottom > top ? top + yradius : bottom + yradius;
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physdev = GET_DC_PHYSDEV( dc, pArcTo );
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ret = physdev->funcs->pArcTo( physdev, left, top, right, bottom,
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xstart, ystart, xend, yend );
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if (ret)
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{
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double angle = atan2(((yend - ycenter) / height),
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((xend - xcenter) / width));
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dc->attr->cur_pos.x = GDI_ROUND( xcenter + (cos( angle ) * xradius) );
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dc->attr->cur_pos.y = GDI_ROUND( ycenter + (sin( angle ) * yradius) );
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}
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break;
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}
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case NtGdiChord:
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physdev = GET_DC_PHYSDEV( dc, pChord );
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ret = physdev->funcs->pChord( physdev, left, top, right, bottom,
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xstart, ystart, xend, yend );
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break;
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case NtGdiPie:
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physdev = GET_DC_PHYSDEV( dc, pPie );
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ret = physdev->funcs->pPie( physdev, left, top, right, bottom,
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xstart, ystart, xend, yend );
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break;
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default:
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WARN( "invalid arc type %u\n", type );
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ret = FALSE;
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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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* NtGdiEllipse (win32u.@)
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*/
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BOOL WINAPI NtGdiEllipse( HDC hdc, INT left, INT top, INT right, INT bottom )
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{
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BOOL ret;
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PHYSDEV physdev;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pEllipse );
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ret = physdev->funcs->pEllipse( physdev, left, top, right, bottom );
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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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* NtGdiRectangle (win32u.@)
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*/
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BOOL WINAPI NtGdiRectangle( HDC hdc, INT left, INT top, INT right, INT bottom )
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{
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PHYSDEV physdev;
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BOOL ret;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pRectangle );
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ret = physdev->funcs->pRectangle( physdev, left, top, right, bottom );
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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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* NtGdiRoundRect (win32u.@)
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*/
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BOOL WINAPI NtGdiRoundRect( HDC hdc, INT left, INT top, INT right,
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INT bottom, INT ell_width, INT ell_height )
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{
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PHYSDEV physdev;
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BOOL ret;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pRoundRect );
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ret = physdev->funcs->pRoundRect( physdev, left, top, right, bottom, ell_width, ell_height );
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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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* NtGdiSetPixel (win32u.@)
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*/
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COLORREF WINAPI NtGdiSetPixel( HDC hdc, INT x, INT y, COLORREF color )
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{
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PHYSDEV physdev;
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COLORREF ret;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return CLR_INVALID;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pSetPixel );
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ret = physdev->funcs->pSetPixel( physdev, x, y, color );
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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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* NtGdiGetPixel (win32u.@)
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*/
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COLORREF WINAPI NtGdiGetPixel( HDC hdc, INT x, INT y )
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{
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PHYSDEV physdev;
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COLORREF ret;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return CLR_INVALID;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pGetPixel );
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ret = physdev->funcs->pGetPixel( physdev, x, y );
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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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* NtGdiSetPixelFormat (win32u.@)
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*
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* Probably not the correct semantics, it's supposed to be an internal backend for SetPixelFormat.
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*/
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BOOL WINAPI NtGdiSetPixelFormat( HDC hdc, INT format )
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{
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DC *dc;
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BOOL ret = TRUE;
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if (!(dc = get_dc_ptr( hdc ))) return FALSE;
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if (!dc->pixel_format) dc->pixel_format = format;
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else ret = (dc->pixel_format == format);
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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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* NtGdiDescribePixelFormat (win32u.@)
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*/
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INT WINAPI NtGdiDescribePixelFormat( HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
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{
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FIXME( "(%p,%d,%d,%p): stub\n", hdc, format, size, descr );
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return 0;
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}
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/******************************************************************************
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* NtGdiSwapBuffers (win32u.@)
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*/
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BOOL WINAPI NtGdiSwapBuffers( HDC hdc )
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{
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FIXME( "(%p): stub\n", hdc );
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return FALSE;
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}
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/***********************************************************************
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* NtGdiFillRgn (win32u.@)
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*/
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BOOL WINAPI NtGdiFillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
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{
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PHYSDEV physdev;
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BOOL retval;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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update_dc( dc );
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physdev = GET_DC_PHYSDEV( dc, pFillRgn );
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retval = physdev->funcs->pFillRgn( physdev, hrgn, hbrush );
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release_dc_ptr( dc );
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return retval;
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}
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/***********************************************************************
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* NtGdiFrameRgn (win32u.@)
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*/
|
|
BOOL WINAPI NtGdiFrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush, INT width, INT height )
|
|
{
|
|
PHYSDEV physdev;
|
|
BOOL ret;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
if (!dc) return FALSE;
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pFrameRgn );
|
|
ret = physdev->funcs->pFrameRgn( physdev, hrgn, hbrush, width, height );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* NtGdiInvertRgn (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiInvertRgn( HDC hdc, HRGN hrgn )
|
|
{
|
|
PHYSDEV physdev;
|
|
BOOL ret;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
if (!dc) return FALSE;
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pInvertRgn );
|
|
ret = physdev->funcs->pInvertRgn( physdev, hrgn );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* NtGdiPolyPolyDraw (win32u.@)
|
|
*/
|
|
ULONG WINAPI NtGdiPolyPolyDraw( HDC hdc, const POINT *points, const UINT *counts,
|
|
UINT count, UINT function )
|
|
{
|
|
PHYSDEV physdev;
|
|
ULONG ret;
|
|
DC *dc;
|
|
|
|
if (function == NtGdiPolyPolygonRgn)
|
|
return HandleToULong( create_polypolygon_region( points, (const INT *)counts, count,
|
|
HandleToULong(hdc), NULL ));
|
|
|
|
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
|
|
update_dc( dc );
|
|
|
|
switch (function)
|
|
{
|
|
case NtGdiPolyPolygon:
|
|
physdev = GET_DC_PHYSDEV( dc, pPolyPolygon );
|
|
ret = physdev->funcs->pPolyPolygon( physdev, points, (const INT *)counts, count );
|
|
break;
|
|
|
|
case NtGdiPolyPolyline:
|
|
physdev = GET_DC_PHYSDEV( dc, pPolyPolyline );
|
|
ret = physdev->funcs->pPolyPolyline( physdev, points, counts, count );
|
|
break;
|
|
|
|
case NtGdiPolyBezier:
|
|
/* *counts must be 3 * n + 1 (where n >= 1) */
|
|
if (count == 1 && *counts != 1 && *counts % 3 == 1)
|
|
{
|
|
physdev = GET_DC_PHYSDEV( dc, pPolyBezier );
|
|
ret = physdev->funcs->pPolyBezier( physdev, points, *counts );
|
|
if (ret) dc->attr->cur_pos = points[*counts - 1];
|
|
}
|
|
else ret = FALSE;
|
|
break;
|
|
|
|
case NtGdiPolyBezierTo:
|
|
if (count == 1 && *counts && *counts % 3 == 0)
|
|
{
|
|
physdev = GET_DC_PHYSDEV( dc, pPolyBezierTo );
|
|
ret = physdev->funcs->pPolyBezierTo( physdev, points, *counts );
|
|
if (ret) dc->attr->cur_pos = points[*counts - 1];
|
|
}
|
|
else ret = FALSE;
|
|
break;
|
|
|
|
case NtGdiPolylineTo:
|
|
if (count == 1)
|
|
{
|
|
physdev = GET_DC_PHYSDEV( dc, pPolylineTo );
|
|
ret = physdev->funcs->pPolylineTo( physdev, points, *counts );
|
|
if (ret && *counts) dc->attr->cur_pos = points[*counts - 1];
|
|
}
|
|
else ret = FALSE;
|
|
break;
|
|
|
|
default:
|
|
WARN( "invalid function %u\n", function );
|
|
ret = FALSE;
|
|
break;
|
|
}
|
|
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* NtGdiExtFloodFill (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiExtFloodFill( HDC hdc, INT x, INT y, COLORREF color, UINT fill_type )
|
|
{
|
|
PHYSDEV physdev;
|
|
BOOL ret;
|
|
DC * dc = get_dc_ptr( hdc );
|
|
|
|
if (!dc) return FALSE;
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pExtFloodFill );
|
|
ret = physdev->funcs->pExtFloodFill( physdev, x, y, color, fill_type );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* NtGdiAngleArc (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiAngleArc( HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle )
|
|
{
|
|
PHYSDEV physdev;
|
|
BOOL result;
|
|
DC *dc;
|
|
|
|
if( (signed int)dwRadius < 0 )
|
|
return FALSE;
|
|
|
|
dc = get_dc_ptr( hdc );
|
|
if(!dc) return FALSE;
|
|
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pAngleArc );
|
|
result = physdev->funcs->pAngleArc( physdev, x, y, dwRadius, eStartAngle, eSweepAngle );
|
|
|
|
if (result)
|
|
{
|
|
dc->attr->cur_pos.x = GDI_ROUND( x + cos( (eStartAngle + eSweepAngle) * M_PI / 180 ) * dwRadius );
|
|
dc->attr->cur_pos.y = GDI_ROUND( y - sin( (eStartAngle + eSweepAngle) * M_PI / 180 ) * dwRadius );
|
|
}
|
|
release_dc_ptr( dc );
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* NtGdiPolyDraw (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiPolyDraw( HDC hdc, const POINT *points, const BYTE *types, DWORD count )
|
|
{
|
|
DC *dc = get_dc_ptr( hdc );
|
|
PHYSDEV physdev;
|
|
BOOL result;
|
|
|
|
if(!dc) return FALSE;
|
|
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pPolyDraw );
|
|
result = physdev->funcs->pPolyDraw( physdev, points, types, count );
|
|
if (result && count)
|
|
dc->attr->cur_pos = points[count - 1];
|
|
|
|
release_dc_ptr( dc );
|
|
return result;
|
|
}
|
|
|
|
|
|
/******************************************************************
|
|
*
|
|
* *Very* simple bezier drawing code,
|
|
*
|
|
* It uses a recursive algorithm to divide the curve in a series
|
|
* of straight line segments. Not ideal but sufficient for me.
|
|
* If you are in need for something better look for some incremental
|
|
* algorithm.
|
|
*
|
|
* 7 July 1998 Rein Klazes
|
|
*/
|
|
|
|
/*
|
|
* some macro definitions for bezier drawing
|
|
*
|
|
* to avoid truncation errors the coordinates are
|
|
* shifted upwards. When used in drawing they are
|
|
* shifted down again, including correct rounding
|
|
* and avoiding floating point arithmetic
|
|
* 4 bits should allow 27 bits coordinates which I saw
|
|
* somewhere in the win32 doc's
|
|
*
|
|
*/
|
|
|
|
#define BEZIERSHIFTBITS 4
|
|
#define BEZIERSHIFTUP(x) ((x)<<BEZIERSHIFTBITS)
|
|
#define BEZIERPIXEL BEZIERSHIFTUP(1)
|
|
#define BEZIERSHIFTDOWN(x) (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
|
|
/* maximum depth of recursion */
|
|
#define BEZIERMAXDEPTH 8
|
|
|
|
/* size of array to store points on */
|
|
/* enough for one curve */
|
|
#define BEZIER_INITBUFSIZE (150)
|
|
|
|
/* calculate Bezier average, in this case the middle
|
|
* correctly rounded...
|
|
* */
|
|
|
|
#define BEZIERMIDDLE(Mid, P1, P2) \
|
|
(Mid).x=((P1).x+(P2).x + 1)/2;\
|
|
(Mid).y=((P1).y+(P2).y + 1)/2;
|
|
|
|
/**********************************************************
|
|
* BezierCheck helper function to check
|
|
* that recursion can be terminated
|
|
* Points[0] and Points[3] are begin and endpoint
|
|
* Points[1] and Points[2] are control points
|
|
* level is the recursion depth
|
|
* returns true if the recursion can be terminated
|
|
*/
|
|
static BOOL BezierCheck( int level, POINT *Points)
|
|
{
|
|
INT dx, dy;
|
|
dx=Points[3].x-Points[0].x;
|
|
dy=Points[3].y-Points[0].y;
|
|
if(abs(dy)<=abs(dx)){/* shallow line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].x < Points[0].x){
|
|
if(Points[1].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].x > Points[3].x)
|
|
return FALSE;
|
|
if(Points[2].x < Points[0].x){
|
|
if(Points[2].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].x > Points[3].x)
|
|
return FALSE;
|
|
dx=BEZIERSHIFTDOWN(dx);
|
|
if(!dx) return TRUE;
|
|
if(abs(Points[1].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
|
|
abs(Points[2].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}else{ /* steep line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].y < Points[0].y){
|
|
if(Points[1].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].y > Points[3].y)
|
|
return FALSE;
|
|
if(Points[2].y < Points[0].y){
|
|
if(Points[2].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].y > Points[3].y)
|
|
return FALSE;
|
|
dy=BEZIERSHIFTDOWN(dy);
|
|
if(!dy) return TRUE;
|
|
if(abs(Points[1].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
|
|
abs(Points[2].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/* Helper for GDI_Bezier.
|
|
* Just handles one Bezier, so Points should point to four POINTs
|
|
*/
|
|
static void GDI_InternalBezier( POINT *Points, POINT **PtsOut, INT *dwOut,
|
|
INT *nPtsOut, INT level )
|
|
{
|
|
if(*nPtsOut == *dwOut) {
|
|
*dwOut *= 2;
|
|
*PtsOut = HeapReAlloc( GetProcessHeap(), 0, *PtsOut,
|
|
*dwOut * sizeof(POINT) );
|
|
}
|
|
|
|
if(!level || BezierCheck(level, Points)) {
|
|
if(*nPtsOut == 0) {
|
|
(*PtsOut)[0].x = BEZIERSHIFTDOWN(Points[0].x);
|
|
(*PtsOut)[0].y = BEZIERSHIFTDOWN(Points[0].y);
|
|
*nPtsOut = 1;
|
|
}
|
|
(*PtsOut)[*nPtsOut].x = BEZIERSHIFTDOWN(Points[3].x);
|
|
(*PtsOut)[*nPtsOut].y = BEZIERSHIFTDOWN(Points[3].y);
|
|
(*nPtsOut) ++;
|
|
} else {
|
|
POINT Points2[4]; /* for the second recursive call */
|
|
Points2[3]=Points[3];
|
|
BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
|
|
BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
|
|
BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
|
|
|
|
BEZIERMIDDLE(Points[1], Points[0], Points[1]);
|
|
BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
|
|
BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
|
|
|
|
Points2[0]=Points[3];
|
|
|
|
/* do the two halves */
|
|
GDI_InternalBezier(Points, PtsOut, dwOut, nPtsOut, level-1);
|
|
GDI_InternalBezier(Points2, PtsOut, dwOut, nPtsOut, level-1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
* GDI_Bezier [INTERNAL]
|
|
* Calculate line segments that approximate -what microsoft calls- a bezier
|
|
* curve.
|
|
* The routine recursively divides the curve in two parts until a straight
|
|
* line can be drawn
|
|
*
|
|
* PARAMS
|
|
*
|
|
* Points [I] Ptr to count POINTs which are the end and control points
|
|
* of the set of Bezier curves to flatten.
|
|
* count [I] Number of Points. Must be 3n+1.
|
|
* nPtsOut [O] Will contain no of points that have been produced (i.e. no. of
|
|
* lines+1).
|
|
*
|
|
* RETURNS
|
|
*
|
|
* Ptr to an array of POINTs that contain the lines that approximate the
|
|
* Beziers. The array is allocated on the process heap and it is the caller's
|
|
* responsibility to HeapFree it. [this is not a particularly nice interface
|
|
* but since we can't know in advance how many points we will generate, the
|
|
* alternative would be to call the function twice, once to determine the size
|
|
* and a second time to do the work - I decided this was too much of a pain].
|
|
*/
|
|
POINT *GDI_Bezier( const POINT *Points, INT count, INT *nPtsOut )
|
|
{
|
|
POINT *out;
|
|
INT Bezier, dwOut = BEZIER_INITBUFSIZE, i;
|
|
|
|
if (count == 1 || (count - 1) % 3 != 0) {
|
|
ERR("Invalid no. of points %d\n", count);
|
|
return NULL;
|
|
}
|
|
*nPtsOut = 0;
|
|
out = HeapAlloc( GetProcessHeap(), 0, dwOut * sizeof(POINT));
|
|
for(Bezier = 0; Bezier < (count-1)/3; Bezier++) {
|
|
POINT ptBuf[4];
|
|
memcpy(ptBuf, Points + Bezier * 3, sizeof(POINT) * 4);
|
|
for(i = 0; i < 4; i++) {
|
|
ptBuf[i].x = BEZIERSHIFTUP(ptBuf[i].x);
|
|
ptBuf[i].y = BEZIERSHIFTUP(ptBuf[i].y);
|
|
}
|
|
GDI_InternalBezier( ptBuf, &out, &dwOut, nPtsOut, BEZIERMAXDEPTH );
|
|
}
|
|
TRACE("Produced %d points\n", *nPtsOut);
|
|
return out;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* NtGdiGdiGradientFill (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiGradientFill( HDC hdc, TRIVERTEX *vert_array, ULONG nvert,
|
|
void *grad_array, ULONG ngrad, ULONG mode )
|
|
{
|
|
DC *dc;
|
|
PHYSDEV physdev;
|
|
BOOL ret;
|
|
ULONG i;
|
|
|
|
if (!vert_array || !nvert || !grad_array || !ngrad || mode > GRADIENT_FILL_TRIANGLE)
|
|
{
|
|
SetLastError( ERROR_INVALID_PARAMETER );
|
|
return FALSE;
|
|
}
|
|
for (i = 0; i < ngrad * (mode == GRADIENT_FILL_TRIANGLE ? 3 : 2); i++)
|
|
if (((ULONG *)grad_array)[i] >= nvert) return FALSE;
|
|
|
|
if (!(dc = get_dc_ptr( hdc ))) return FALSE;
|
|
update_dc( dc );
|
|
physdev = GET_DC_PHYSDEV( dc, pGradientFill );
|
|
ret = physdev->funcs->pGradientFill( physdev, vert_array, nvert, grad_array, ngrad, mode );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* NtGdiDrawStream (win32u.@)
|
|
*/
|
|
BOOL WINAPI NtGdiDrawStream( HDC hdc, ULONG in, void *pvin )
|
|
{
|
|
FIXME("stub: %p, %d, %p\n", hdc, in, pvin);
|
|
return FALSE;
|
|
}
|