/* * GDI drawing functions. * * Copyright 1993, 1994 Alexandre Julliard * Copyright 1997 Bertho A. Stultiens * 1999 Huw D M Davies */ #include #include "dc.h" #include "bitmap.h" #include "heap.h" #include "region.h" #include "path.h" #include "debugtools.h" #include "winerror.h" #include "windef.h" #include "wingdi.h" DEFAULT_DEBUG_CHANNEL(gdi); /*********************************************************************** * LineTo16 (GDI.19) */ BOOL16 WINAPI LineTo16( HDC16 hdc, INT16 x, INT16 y ) { return LineTo( hdc, x, y ); } /*********************************************************************** * LineTo (GDI32.249) */ BOOL WINAPI LineTo( HDC hdc, INT x, INT y ) { DC * dc = DC_GetDCPtr( hdc ); BOOL ret; if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) ret = PATH_LineTo(hdc, x, y); else ret = dc->funcs->pLineTo && dc->funcs->pLineTo(dc,x,y); if(ret) { dc->w.CursPosX = x; dc->w.CursPosY = y; } return ret; } /*********************************************************************** * MoveTo16 (GDI.20) */ DWORD WINAPI MoveTo16( HDC16 hdc, INT16 x, INT16 y ) { POINT16 pt; if (!MoveToEx16(hdc,x,y,&pt)) return 0; return MAKELONG(pt.x,pt.y); } /*********************************************************************** * MoveToEx16 (GDI.483) */ BOOL16 WINAPI MoveToEx16( HDC16 hdc, INT16 x, INT16 y, LPPOINT16 pt ) { POINT pt32; if (!MoveToEx( (HDC)hdc, (INT)x, (INT)y, &pt32 )) return FALSE; if (pt) CONV_POINT32TO16( &pt32, pt ); return TRUE; } /*********************************************************************** * MoveToEx (GDI32.254) */ BOOL WINAPI MoveToEx( HDC hdc, INT x, INT y, LPPOINT pt ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(pt) { pt->x = dc->w.CursPosX; pt->y = dc->w.CursPosY; } dc->w.CursPosX = x; dc->w.CursPosY = y; if(PATH_IsPathOpen(dc->w.path)) return PATH_MoveTo(hdc); if(dc->funcs->pMoveToEx) return dc->funcs->pMoveToEx(dc,x,y,pt); return TRUE; } /*********************************************************************** * Arc16 (GDI.23) */ BOOL16 WINAPI Arc16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom, INT16 xstart, INT16 ystart, INT16 xend, INT16 yend ) { return Arc( (HDC)hdc, (INT)left, (INT)top, (INT)right, (INT)bottom, (INT)xstart, (INT)ystart, (INT)xend, (INT)yend ); } /*********************************************************************** * Arc (GDI32.7) */ BOOL WINAPI Arc( HDC hdc, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_Arc(hdc, left, top, right, bottom, xstart, ystart, xend, yend); return dc->funcs->pArc && dc->funcs->pArc(dc,left,top,right,bottom,xstart,ystart,xend,yend); } /*********************************************************************** * ArcTo (GDI32.8) */ BOOL WINAPI ArcTo( HDC hdc, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) { BOOL result; DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(dc->funcs->pArcTo) return dc->funcs->pArcTo( dc, left, top, right, bottom, xstart, ystart, xend, yend ); /* * Else emulate it. * According to the documentation, a line is drawn from the current * position to the starting point of the arc. */ LineTo(hdc, xstart, ystart); /* * Then the arc is drawn. */ result = Arc(hdc, left, top, right, bottom, xstart, ystart, xend, yend); /* * If no error occured, the current position is moved to the ending * point of the arc. */ if (result) { MoveToEx(hdc, xend, yend, NULL); } return result; } /*********************************************************************** * Pie16 (GDI.26) */ BOOL16 WINAPI Pie16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom, INT16 xstart, INT16 ystart, INT16 xend, INT16 yend ) { return Pie( (HDC)hdc, (INT)left, (INT)top, (INT)right, (INT)bottom, (INT)xstart, (INT)ystart, (INT)xend, (INT)yend ); } /*********************************************************************** * Pie (GDI32.262) */ BOOL WINAPI Pie( HDC hdc, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) { FIXME("-> Path: stub\n"); return FALSE; } return dc->funcs->pPie && dc->funcs->pPie(dc,left,top,right,bottom,xstart,ystart,xend,yend); } /*********************************************************************** * Chord16 (GDI.348) */ BOOL16 WINAPI Chord16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom, INT16 xstart, INT16 ystart, INT16 xend, INT16 yend ) { return Chord( hdc, left, top, right, bottom, xstart, ystart, xend, yend ); } /*********************************************************************** * Chord (GDI32.14) */ BOOL WINAPI Chord( HDC hdc, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) { FIXME("-> Path: stub\n"); return FALSE; } return dc->funcs->pChord && dc->funcs->pChord(dc,left,top,right,bottom,xstart,ystart,xend,yend); } /*********************************************************************** * Ellipse16 (GDI.24) */ BOOL16 WINAPI Ellipse16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom ) { return Ellipse( hdc, left, top, right, bottom ); } /*********************************************************************** * Ellipse (GDI32.75) */ BOOL WINAPI Ellipse( HDC hdc, INT left, INT top, INT right, INT bottom ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) { FIXME("-> Path: stub\n"); return FALSE; } return dc->funcs->pEllipse && dc->funcs->pEllipse(dc,left,top,right,bottom); } /*********************************************************************** * Rectangle16 (GDI.27) */ BOOL16 WINAPI Rectangle16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom ) { return Rectangle( hdc, left, top, right, bottom ); } /*********************************************************************** * Rectangle (GDI32.283) */ BOOL WINAPI Rectangle( HDC hdc, INT left, INT top, INT right, INT bottom ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_Rectangle(hdc, left, top, right, bottom); return dc->funcs->pRectangle && dc->funcs->pRectangle(dc,left,top,right,bottom); } /*********************************************************************** * RoundRect16 (GDI.28) */ BOOL16 WINAPI RoundRect16( HDC16 hdc, INT16 left, INT16 top, INT16 right, INT16 bottom, INT16 ell_width, INT16 ell_height ) { return RoundRect( hdc, left, top, right, bottom, ell_width, ell_height ); } /*********************************************************************** * RoundRect (GDI32.291) */ BOOL WINAPI RoundRect( HDC hdc, INT left, INT top, INT right, INT bottom, INT ell_width, INT ell_height ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) { FIXME("-> Path: stub\n"); return FALSE; } return dc->funcs->pRoundRect && dc->funcs->pRoundRect(dc,left,top,right,bottom,ell_width,ell_height); } /*********************************************************************** * SetPixel16 (GDI.31) */ COLORREF WINAPI SetPixel16( HDC16 hdc, INT16 x, INT16 y, COLORREF color ) { return SetPixel( hdc, x, y, color ); } /*********************************************************************** * SetPixel (GDI32.327) */ COLORREF WINAPI SetPixel( HDC hdc, INT x, INT y, COLORREF color ) { DC * dc = DC_GetDCPtr( hdc ); if (!dc || !dc->funcs->pSetPixel) return 0; return dc->funcs->pSetPixel(dc,x,y,color); } /*********************************************************************** * SetPixelV (GDI32.329) */ BOOL WINAPI SetPixelV( HDC hdc, INT x, INT y, COLORREF color ) { DC * dc = DC_GetDCPtr( hdc ); if (!dc || !dc->funcs->pSetPixel) return FALSE; dc->funcs->pSetPixel(dc,x,y,color); return TRUE; } /*********************************************************************** * GetPixel16 (GDI.83) */ COLORREF WINAPI GetPixel16( HDC16 hdc, INT16 x, INT16 y ) { return GetPixel( hdc, x, y ); } /*********************************************************************** * GetPixel (GDI32.211) */ COLORREF WINAPI GetPixel( HDC hdc, INT x, INT y ) { DC * dc = DC_GetDCPtr( hdc ); if (!dc) return 0; #ifdef SOLITAIRE_SPEED_HACK return 0; #endif /* FIXME: should this be in the graphics driver? */ if (!PtVisible( hdc, x, y )) return 0; if (!dc || !dc->funcs->pGetPixel) return 0; return dc->funcs->pGetPixel(dc,x,y); } /****************************************************************************** * ChoosePixelFormat [GDI32.13] * Matches a pixel format to given format * * PARAMS * hdc [I] Device context to search for best pixel match * ppfd [I] Pixel format for which a match is sought * * RETURNS * Success: Pixel format index closest to given format * Failure: 0 */ INT WINAPI ChoosePixelFormat( HDC hdc, const LPPIXELFORMATDESCRIPTOR ppfd ) { DC * dc = DC_GetDCPtr( hdc ); TRACE("(%08x,%p)\n",hdc,ppfd); if (dc == NULL) return 0; if (dc->funcs->pChoosePixelFormat == NULL) { FIXME(" :stub\n"); return 0; } return dc->funcs->pChoosePixelFormat(dc,ppfd); } /****************************************************************************** * SetPixelFormat [GDI32.328] * Sets pixel format of device context * * PARAMS * hdc [I] Device context to search for best pixel match * iPixelFormat [I] Pixel format index * ppfd [I] Pixel format for which a match is sought * * RETURNS STD */ BOOL WINAPI SetPixelFormat( HDC hdc, INT iPixelFormat, const PIXELFORMATDESCRIPTOR *ppfd) { DC * dc = DC_GetDCPtr( hdc ); TRACE("(%d,%d,%p)\n",hdc,iPixelFormat,ppfd); if (dc == NULL) return 0; if (dc->funcs->pSetPixelFormat == NULL) { FIXME(" :stub\n"); return 0; } return dc->funcs->pSetPixelFormat(dc,iPixelFormat,ppfd); } /****************************************************************************** * GetPixelFormat [GDI32.212] * Gets index of pixel format of DC * * PARAMETERS * hdc [I] Device context whose pixel format index is sought * * RETURNS * Success: Currently selected pixel format * Failure: 0 */ INT WINAPI GetPixelFormat( HDC hdc ) { DC * dc = DC_GetDCPtr( hdc ); TRACE("(%08x)\n",hdc); if (dc == NULL) return 0; if (dc->funcs->pGetPixelFormat == NULL) { FIXME(" :stub\n"); return 0; } return dc->funcs->pGetPixelFormat(dc); } /****************************************************************************** * DescribePixelFormat [GDI32.71] * Gets info about pixel format from DC * * PARAMS * hdc [I] Device context * iPixelFormat [I] Pixel format selector * nBytes [I] Size of buffer * ppfd [O] Pointer to structure to receive pixel format data * * RETURNS * Success: Maximum pixel format index of the device context * Failure: 0 */ INT WINAPI DescribePixelFormat( HDC hdc, INT iPixelFormat, UINT nBytes, LPPIXELFORMATDESCRIPTOR ppfd ) { DC * dc = DC_GetDCPtr( hdc ); TRACE("(%08x,%d,%d,%p): stub\n",hdc,iPixelFormat,nBytes,ppfd); if (dc == NULL) return 0; if (dc->funcs->pDescribePixelFormat == NULL) { FIXME(" :stub\n"); ppfd->nSize = nBytes; ppfd->nVersion = 1; return 3; } return dc->funcs->pDescribePixelFormat(dc,iPixelFormat,nBytes,ppfd); } /****************************************************************************** * SwapBuffers [GDI32.354] * Exchanges front and back buffers of window * * PARAMS * hdc [I] Device context whose buffers get swapped * * RETURNS STD */ BOOL WINAPI SwapBuffers( HDC hdc ) { DC * dc = DC_GetDCPtr( hdc ); TRACE("(%08x)\n",hdc); if (dc == NULL) return 0; if (dc->funcs->pSwapBuffers == NULL) { FIXME(" :stub\n"); return TRUE; } return dc->funcs->pSwapBuffers(dc); } /*********************************************************************** * PaintRgn16 (GDI.43) */ BOOL16 WINAPI PaintRgn16( HDC16 hdc, HRGN16 hrgn ) { return PaintRgn( hdc, hrgn ); } /*********************************************************************** * PaintRgn (GDI32.259) */ BOOL WINAPI PaintRgn( HDC hdc, HRGN hrgn ) { DC * dc = DC_GetDCPtr( hdc ); return dc && dc->funcs->pPaintRgn && dc->funcs->pPaintRgn(dc,hrgn); } /*********************************************************************** * FillRgn16 (GDI.40) */ BOOL16 WINAPI FillRgn16( HDC16 hdc, HRGN16 hrgn, HBRUSH16 hbrush ) { return FillRgn( hdc, hrgn, hbrush ); } /*********************************************************************** * FillRgn (GDI32.101) */ BOOL WINAPI FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush ) { BOOL retval; HBRUSH prevBrush; DC * dc = DC_GetDCPtr( hdc ); if (!dc) return FALSE; if(dc->funcs->pFillRgn) return dc->funcs->pFillRgn(dc, hrgn, hbrush); prevBrush = SelectObject( hdc, hbrush ); if (!prevBrush) return FALSE; retval = PaintRgn( hdc, hrgn ); SelectObject( hdc, prevBrush ); return retval; } /*********************************************************************** * FrameRgn16 (GDI.41) */ BOOL16 WINAPI FrameRgn16( HDC16 hdc, HRGN16 hrgn, HBRUSH16 hbrush, INT16 nWidth, INT16 nHeight ) { return FrameRgn( hdc, hrgn, hbrush, nWidth, nHeight ); } /*********************************************************************** * FrameRgn (GDI32.105) */ BOOL WINAPI FrameRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush, INT nWidth, INT nHeight ) { HRGN tmp; DC *dc = DC_GetDCPtr( hdc ); if(dc->funcs->pFrameRgn) return dc->funcs->pFrameRgn( dc, hrgn, hbrush, nWidth, nHeight ); tmp = CreateRectRgn( 0, 0, 0, 0 ); if(!REGION_FrameRgn( tmp, hrgn, nWidth, nHeight )) return FALSE; FillRgn( hdc, tmp, hbrush ); DeleteObject( tmp ); return TRUE; } /*********************************************************************** * InvertRgn16 (GDI.42) */ BOOL16 WINAPI InvertRgn16( HDC16 hdc, HRGN16 hrgn ) { return InvertRgn( hdc, hrgn ); } /*********************************************************************** * InvertRgn (GDI32.246) */ BOOL WINAPI InvertRgn( HDC hdc, HRGN hrgn ) { HBRUSH prevBrush; INT prevROP; BOOL retval; DC *dc = DC_GetDCPtr( hdc ); if(dc->funcs->pInvertRgn) return dc->funcs->pInvertRgn( dc, hrgn ); prevBrush = SelectObject( hdc, GetStockObject(BLACK_BRUSH) ); prevROP = SetROP2( hdc, R2_NOT ); retval = PaintRgn( hdc, hrgn ); SelectObject( hdc, prevBrush ); SetROP2( hdc, prevROP ); return retval; } /********************************************************************** * Polyline16 (GDI.37) */ BOOL16 WINAPI Polyline16( HDC16 hdc, const POINT16* pt, INT16 count ) { register int i; BOOL16 ret; LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, count*sizeof(POINT) ); if (!pt32) return FALSE; for (i=count;i--;) CONV_POINT16TO32(&(pt[i]),&(pt32[i])); ret = Polyline(hdc,pt32,count); HeapFree( GetProcessHeap(), 0, pt32 ); return ret; } /********************************************************************** * Polyline (GDI32.276) */ BOOL WINAPI Polyline( HDC hdc, const POINT* pt, INT count ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_Polyline(hdc, pt, count); return dc->funcs->pPolyline && dc->funcs->pPolyline(dc,pt,count); } /********************************************************************** * PolylineTo (GDI32.277) */ BOOL WINAPI PolylineTo( HDC hdc, const POINT* pt, DWORD cCount ) { DC * dc = DC_GetDCPtr( hdc ); BOOL ret; if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) ret = PATH_PolylineTo(hdc, pt, cCount); else if(dc->funcs->pPolylineTo) ret = dc->funcs->pPolylineTo(dc, pt, cCount); else { /* do it using Polyline */ POINT *pts = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (cCount + 1) ); if(!pts) return FALSE; pts[0].x = dc->w.CursPosX; pts[0].y = dc->w.CursPosY; memcpy( pts + 1, pt, sizeof(POINT) * cCount ); ret = Polyline( hdc, pts, cCount + 1 ); HeapFree( GetProcessHeap(), 0, pts ); } if(ret) { dc->w.CursPosX = pt[cCount-1].x; dc->w.CursPosY = pt[cCount-1].y; } return ret; } /********************************************************************** * Polygon16 (GDI.36) */ BOOL16 WINAPI Polygon16( HDC16 hdc, const POINT16* pt, INT16 count ) { register int i; BOOL ret; LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, count*sizeof(POINT) ); if (!pt32) return FALSE; for (i=count;i--;) CONV_POINT16TO32(&(pt[i]),&(pt32[i])); ret = Polygon(hdc,pt32,count); HeapFree( GetProcessHeap(), 0, pt32 ); return ret; } /********************************************************************** * Polygon (GDI32.275) */ BOOL WINAPI Polygon( HDC hdc, const POINT* pt, INT count ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_Polygon(hdc, pt, count); return dc->funcs->pPolygon && dc->funcs->pPolygon(dc,pt,count); } /********************************************************************** * PolyPolygon16 (GDI.450) */ BOOL16 WINAPI PolyPolygon16( HDC16 hdc, const POINT16* pt, const INT16* counts, UINT16 polygons ) { int i,nrpts; LPPOINT pt32; LPINT counts32; BOOL16 ret; nrpts=0; for (i=polygons;i--;) nrpts+=counts[i]; pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, sizeof(POINT)*nrpts); if(pt32 == NULL) return FALSE; for (i=nrpts;i--;) CONV_POINT16TO32(&(pt[i]),&(pt32[i])); counts32 = (LPINT)HeapAlloc( GetProcessHeap(), 0, polygons*sizeof(INT) ); if(counts32 == NULL) { HeapFree( GetProcessHeap(), 0, pt32 ); return FALSE; } for (i=polygons;i--;) counts32[i]=counts[i]; ret = PolyPolygon(hdc,pt32,counts32,polygons); HeapFree( GetProcessHeap(), 0, counts32 ); HeapFree( GetProcessHeap(), 0, pt32 ); return ret; } /********************************************************************** * PolyPolygon (GDI.450) */ BOOL WINAPI PolyPolygon( HDC hdc, const POINT* pt, const INT* counts, UINT polygons ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_PolyPolygon(hdc, pt, counts, polygons); return dc->funcs->pPolyPolygon && dc->funcs->pPolyPolygon(dc,pt,counts,polygons); } /********************************************************************** * PolyPolyline (GDI32.272) */ BOOL WINAPI PolyPolyline( HDC hdc, const POINT* pt, const DWORD* counts, DWORD polylines ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_PolyPolyline(hdc, pt, counts, polylines); return dc->funcs->pPolyPolyline && dc->funcs->pPolyPolyline(dc,pt,counts,polylines); } /********************************************************************** * ExtFloodFill16 (GDI.372) */ BOOL16 WINAPI ExtFloodFill16( HDC16 hdc, INT16 x, INT16 y, COLORREF color, UINT16 fillType ) { return ExtFloodFill( hdc, x, y, color, fillType ); } /********************************************************************** * ExtFloodFill (GDI32.96) */ BOOL WINAPI ExtFloodFill( HDC hdc, INT x, INT y, COLORREF color, UINT fillType ) { DC *dc = DC_GetDCPtr( hdc ); return dc && dc->funcs->pExtFloodFill && dc->funcs->pExtFloodFill(dc,x,y,color,fillType); } /********************************************************************** * FloodFill16 (GDI.25) */ BOOL16 WINAPI FloodFill16( HDC16 hdc, INT16 x, INT16 y, COLORREF color ) { return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER ); } /********************************************************************** * FloodFill (GDI32.104) */ BOOL WINAPI FloodFill( HDC hdc, INT x, INT y, COLORREF color ) { return ExtFloodFill( hdc, x, y, color, FLOODFILLBORDER ); } /****************************************************************************** * PolyBezier16 [GDI.502] */ BOOL16 WINAPI PolyBezier16( HDC16 hDc, const POINT16* lppt, INT16 cPoints ) { int i; BOOL16 ret; LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, cPoints*sizeof(POINT) ); if(!pt32) return FALSE; for (i=cPoints;i--;) CONV_POINT16TO32(&(lppt[i]),&(pt32[i])); ret= PolyBezier(hDc, pt32, cPoints); HeapFree( GetProcessHeap(), 0, pt32 ); return ret; } /****************************************************************************** * PolyBezierTo16 [GDI.503] */ BOOL16 WINAPI PolyBezierTo16( HDC16 hDc, const POINT16* lppt, INT16 cPoints ) { int i; BOOL16 ret; LPPOINT pt32 = (LPPOINT)HeapAlloc( GetProcessHeap(), 0, cPoints*sizeof(POINT) ); if(!pt32) return FALSE; for (i=cPoints;i--;) CONV_POINT16TO32(&(lppt[i]),&(pt32[i])); ret= PolyBezierTo(hDc, pt32, cPoints); HeapFree( GetProcessHeap(), 0, pt32 ); return ret; } /****************************************************************************** * PolyBezier [GDI32.268] * Draws one or more Bezier curves * * PARAMS * hDc [I] Handle to device context * lppt [I] Pointer to endpoints and control points * cPoints [I] Count of endpoints and control points * * RETURNS STD */ BOOL WINAPI PolyBezier( HDC hdc, const POINT* lppt, DWORD cPoints ) { DC * dc = DC_GetDCPtr( hdc ); if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) return PATH_PolyBezier(hdc, lppt, cPoints); if(dc->funcs->pPolyBezier) return dc->funcs->pPolyBezier(dc, lppt, cPoints); /* We'll convert it into line segments and draw them using Polyline */ { POINT *Pts; INT nOut; BOOL ret; Pts = GDI_Bezier( lppt, cPoints, &nOut ); if(!Pts) return FALSE; TRACE("Pts = %p, no = %d\n", Pts, nOut); ret = Polyline( dc->hSelf, Pts, nOut ); HeapFree( GetProcessHeap(), 0, Pts ); return ret; } } /****************************************************************************** * PolyBezierTo [GDI32.269] * Draws one or more Bezier curves * * PARAMS * hDc [I] Handle to device context * lppt [I] Pointer to endpoints and control points * cPoints [I] Count of endpoints and control points * * RETURNS STD */ BOOL WINAPI PolyBezierTo( HDC hdc, const POINT* lppt, DWORD cPoints ) { DC * dc = DC_GetDCPtr( hdc ); BOOL ret; if(!dc) return FALSE; if(PATH_IsPathOpen(dc->w.path)) ret = PATH_PolyBezierTo(hdc, lppt, cPoints); else if(dc->funcs->pPolyBezierTo) ret = dc->funcs->pPolyBezierTo(dc, lppt, cPoints); else { /* We'll do it using PolyBezier */ POINT *pt; pt = HeapAlloc( GetProcessHeap(), 0, sizeof(POINT) * (cPoints + 1) ); if(!pt) return FALSE; pt[0].x = dc->w.CursPosX; pt[0].y = dc->w.CursPosY; memcpy(pt + 1, lppt, sizeof(POINT) * cPoints); ret = PolyBezier(dc->hSelf, pt, cPoints+1); HeapFree( GetProcessHeap(), 0, pt ); } if(ret) { dc->w.CursPosX = lppt[cPoints-1].x; dc->w.CursPosY = lppt[cPoints-1].y; } return ret; } /*********************************************************************** * AngleArc (GDI32.5) * */ BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, FLOAT eSweepAngle) { FIXME("AngleArc, stub\n"); return 0; } /*********************************************************************** * PolyDraw (GDI32.270) * */ BOOL WINAPI PolyDraw(HDC hdc, const POINT *lppt, const BYTE *lpbTypes, DWORD cCount) { FIXME("PolyDraw, stub\n"); return 0; } /****************************************************************** * * *Very* simple bezier drawing code, * * It uses a recursive algorithm to divide the curve in a series * of straight line segements. Not ideal but for me sufficient. * 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 trucation errors the coordinates are * shifted upwards. When used in drawing they are * shifted down again, including correct rounding * and avoiding floating point arithmatic * 4 bits should allow 27 bits coordinates which I saw * somewere in the win32 doc's * */ #define BEZIERSHIFTBITS 4 #define BEZIERSHIFTUP(x) ((x)<>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 recusion 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 approximinate 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 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) % 3 != 0) { ERR("Invalid no. of points\n"); 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; }