X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/dc1efb1d9f4e4ce7d8f889dad3aaab7026b73058..54081dc5c22c4ef292eb343b4c5b8821ac92dbbd:/src/msw/dc.cpp diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp index 354c617418..90433d392f 100644 --- a/src/msw/dc.cpp +++ b/src/msw/dc.cpp @@ -55,7 +55,7 @@ #include #endif -IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject) +IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase) // --------------------------------------------------------------------------- // constants @@ -82,10 +82,87 @@ static const int MM_METRIC = 10; // convert degrees to radians static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; } +// ---------------------------------------------------------------------------- +// private classes +// ---------------------------------------------------------------------------- + +// instead of duplicating the same code which sets and then restores text +// colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes, +// encapsulate this in a small helper class + +// wxColourChanger: changes the text colours in the ctor if required and +// restores them in the dtor +class wxColourChanger +{ +public: + wxColourChanger(wxDC& dc); + ~wxColourChanger(); + +private: + wxDC& m_dc; + + COLORREF m_colFgOld, m_colBgOld; + + bool m_changed; +}; + // =========================================================================== // implementation // =========================================================================== +// ---------------------------------------------------------------------------- +// wxColourChanger +// ---------------------------------------------------------------------------- + +wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc) +{ + if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE ) + { + HDC hdc = GetHdcOf(dc); + m_colFgOld = ::GetTextColor(hdc); + m_colBgOld = ::GetBkColor(hdc); + + // note that Windows convention is opposite to wxWindows one, this is + // why text colour becomes the background one and vice versa + const wxColour& colFg = dc.GetTextForeground(); + if ( colFg.Ok() ) + { + ::SetBkColor(hdc, colFg.GetPixel()); + } + + const wxColour& colBg = dc.GetTextBackground(); + if ( colBg.Ok() ) + { + ::SetTextColor(hdc, colBg.GetPixel()); + } + + SetBkMode(hdc, + dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT + : OPAQUE); + + // flag which telsl us to undo changes in the dtor + m_changed = TRUE; + } + else + { + // nothing done, nothing to undo + m_changed = FALSE; + } +} + +wxColourChanger::~wxColourChanger() +{ + if ( m_changed ) + { + // restore the colours we changed + HDC hdc = GetHdcOf(m_dc); + + ::SetBkMode(hdc, TRANSPARENT); + ::SetTextColor(hdc, m_colFgOld); + ::SetBkColor(hdc, m_colBgOld); + } +} + // --------------------------------------------------------------------------- // wxDC // --------------------------------------------------------------------------- @@ -175,43 +252,39 @@ void wxDC::SelectOldObjects(WXHDC dc) // clipping // --------------------------------------------------------------------------- +#define DO_SET_CLIPPING_BOX() \ +{ \ + RECT rect; \ + \ + GetClipBox(GetHdc(), &rect); \ + \ + m_clipX1 = (wxCoord) XDEV2LOG(rect.left); \ + m_clipY1 = (wxCoord) YDEV2LOG(rect.top); \ + m_clipX2 = (wxCoord) XDEV2LOG(rect.right); \ + m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom); \ +} + void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch) { m_clipping = TRUE; - m_clipX1 = (int)cx; - m_clipY1 = (int)cy; - m_clipX2 = (int)(cx + cw); - m_clipY2 = (int)(cy + ch); - - DoClipping((WXHDC) m_hDC); + IntersectClipRect(GetHdc(), XLOG2DEV(cx), YLOG2DEV(cy), + XLOG2DEV(cx + cw), YLOG2DEV(cy + ch)); + DO_SET_CLIPPING_BOX() } void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region) { wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") ); - wxRect box = region.GetBox(); - m_clipping = TRUE; - m_clipX1 = box.x; - m_clipY1 = box.y; - m_clipX2 = box.x + box.width; - m_clipY2 = box.y + box.height; #ifdef __WIN16__ SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN()); #else ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND); #endif -} -void wxDC::DoClipping(WXHDC dc) -{ - if (m_clipping && dc) - { - IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1), - XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2)); - } + DO_SET_CLIPPING_BOX() } void wxDC::DestroyClippingRegion() @@ -307,7 +380,7 @@ void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style) // * The point is outside the clipping region that is, it is not // visible on the device. // - wxLogLastError("ExtFloodFill"); + wxLogLastError(wxT("ExtFloodFill")); } CalcBoundingBox(x, y); @@ -315,31 +388,12 @@ void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style) bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const { + wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") ); + // get the color of the pixel COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)); - // JACS: what was this for? -#if 0 - // get the color of the pen - COLORREF pencolor = 0x00ffffff; - if (m_pen.Ok()) - { - pencolor = m_pen.GetColour().GetPixel(); - } -#endif - - // return the color of the pixel - if( col ) - { - col->Set(GetRValue(pixelcolor), - GetGValue(pixelcolor), - GetBValue(pixelcolor)); - } - - // check, if color of the pixels is the same as the color of the current - // pen and return TRUE if it is, FALSE otherwise - // JACS, 24/02/2000: can't understand the reason for this, so returning TRUE instead. - // return pixelcolor == pencolor; + wxRGBToColour(*col, pixelcolor); return TRUE; } @@ -374,14 +428,23 @@ void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) CalcBoundingBox(x2, y2); } -void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wxCoord yc) +// Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1) +// and ending at (x2, y2) +void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, + wxCoord x2, wxCoord y2, + wxCoord xc, wxCoord yc) { - double dx = xc-x1; - double dy = yc-y1; - double radius = (double)sqrt(dx*dx+dy*dy) ;; - if (x1==x2 && x2==y2) + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling + + double dx = xc - x1; + double dy = yc - y1; + double radius = (double)sqrt(dx*dx+dy*dy); + wxCoord r = (wxCoord)radius; + + // treat the special case of full circle separately + if ( x1 == x2 && y1 == y2 ) { - DrawEllipse(xc,yc,(wxCoord)(radius*2.0),(wxCoord)(radius*2.0)); + DrawEllipse(xc - r, yc - r, 2*r, 2*r); return; } @@ -393,27 +456,27 @@ void wxDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2, wxCoord xc, wx wxCoord yyc = YLOG2DEV(yc); wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1))); - (void)MoveToEx(GetHdc(), (int) xx1, (int) yy1, NULL); wxCoord xxx1 = (wxCoord) (xxc-ray); wxCoord yyy1 = (wxCoord) (yyc-ray); wxCoord xxx2 = (wxCoord) (xxc+ray); wxCoord yyy2 = (wxCoord) (yyc+ray); - if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT) + + if ( m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT ) { // Have to add 1 to bottom-right corner of rectangle // to make semi-circles look right (crooked line otherwise). // Unfortunately this is not a reliable method, depends // on the size of shape. // TODO: figure out why this happens! - Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1, - xx1,yy1,xx2,yy2); + Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1, xx1,yy1,xx2,yy2); } else - Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2, - xx1,yy1,xx2,yy2); + { + Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2, xx1,yy1,xx2,yy2); + } - CalcBoundingBox((wxCoord)(xc-radius), (wxCoord)(yc-radius)); - CalcBoundingBox((wxCoord)(xc+radius), (wxCoord)(yc+radius)); + CalcBoundingBox(xc - r, yc - r); + CalcBoundingBox(xc + r, yc + r); } void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1, @@ -466,27 +529,7 @@ void wxDC::DoDrawPoint(wxCoord x, wxCoord y) void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle) { - COLORREF old_textground = ::GetTextColor(GetHdc()); - COLORREF old_background = ::GetBkColor(GetHdc()); - if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE) - { - - if (m_textForegroundColour.Ok()) - { //just the oposite from what is expected see help on pattern brush - // 1 in mask becomes bk color - ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel() ); - } - if (m_textBackgroundColour.Ok()) - { //just the oposite from what is expected - // 0 in mask becomes text color - ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel() ); - } - - if (m_backgroundMode == wxTRANSPARENT) - SetBkMode(GetHdc(), TRANSPARENT); - else - SetBkMode(GetHdc(), OPAQUE); - } + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling // Do things less efficiently if we have offsets if (xoffset != 0 || yoffset != 0) @@ -515,13 +558,6 @@ void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffs (void)Polygon(GetHdc(), (POINT*) points, n); SetPolyFillMode(GetHdc(),prev); } - - if (m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE) - { - ::SetBkMode(GetHdc(), TRANSPARENT); - ::SetTextColor(GetHdc(), old_textground); - ::SetBkColor(GetHdc(), old_background); - } } void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset) @@ -553,31 +589,7 @@ void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { - COLORREF colFgOld = 0, - colBgOld = 0; - - if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE ) - { - colFgOld = ::GetTextColor(GetHdc()); - colBgOld = ::GetBkColor(GetHdc()); - - if ( m_textForegroundColour.Ok() ) - { - // just the oposite from what is expected see help on pattern brush - // 1 in mask becomes bk color - ::SetBkColor(GetHdc(), m_textForegroundColour.GetPixel()); - } - - if ( m_textBackgroundColour.Ok() ) - { - // 0 in mask becomes text color - ::SetTextColor(GetHdc(), m_textBackgroundColour.GetPixel()); - } - - // VZ: IMHO this does strictly nothing here - SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT - : OPAQUE); - } + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling wxCoord x2 = x + width; wxCoord y2 = y + height; @@ -595,7 +607,7 @@ void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { // Windows draws the filled rectangles without outline (i.e. drawn with a // transparent pen) one pixel smaller in both directions and we want them - // to have the same size regardless of which pen is used - adjust + // to have the same size regardless of which pen is used - adjust // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR. if ( m_pen.GetStyle() == wxTRANSPARENT ) @@ -604,24 +616,18 @@ void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) y2++; } - (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); + (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); } CalcBoundingBox(x, y); CalcBoundingBox(x2, y2); - - if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE ) - { - // restore the colours we changed - ::SetBkMode(GetHdc(), TRANSPARENT); - ::SetTextColor(GetHdc(), colFgOld); - ::SetBkColor(GetHdc(), colBgOld); - } } void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius) { + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling + // Now, a negative radius value is interpreted to mean // 'the proportion of the smallest X or Y dimension' @@ -656,6 +662,8 @@ void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord h void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling + wxCoord x2 = (x+width); wxCoord y2 = (y+height); @@ -668,8 +676,10 @@ void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height) // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea) { - wxCoord x2 = (x+w); - wxCoord y2 = (y+h); + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling + + wxCoord x2 = x + w; + wxCoord y2 = y + h; int rx1 = XLOG2DEV(x+w/2); int ry1 = YLOG2DEV(y+h/2); @@ -686,20 +696,22 @@ void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,d // draw pie with NULL_PEN first and then outline otherwise a line is // drawn from the start and end points to the centre - HPEN orig_pen = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN)); + HPEN hpenOld = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN)); if (m_signY > 0) { (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1, - rx1, ry1, rx2, ry2); + rx1, ry1, rx2, ry2); } else { (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2), - rx1, ry1-1, rx2, ry2-1); + rx1, ry1-1, rx2, ry2-1); } - ::SelectObject(GetHdc(), orig_pen); + + ::SelectObject(GetHdc(), hpenOld); + (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2), - rx1, ry1, rx2, ry2); + rx1, ry1, rx2, ry2); CalcBoundingBox(x, y); CalcBoundingBox(x2, y2); @@ -709,7 +721,11 @@ void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) { wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") ); +#ifdef __WIN32__ + ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon), icon.GetWidth(), icon.GetHeight(), 0, NULL, DI_NORMAL); +#else ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon)); +#endif CalcBoundingBox(x, y); CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight()); @@ -823,7 +839,7 @@ void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y) if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), text.c_str(), text.length()) == 0 ) { - wxLogLastError("TextOut"); + wxLogLastError(wxT("TextOut")); } // restore the old parameters (text foreground colour may be left because @@ -856,7 +872,7 @@ void wxDC::DoDrawRotatedText(const wxString& text, LOGFONT lf; if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 ) { - wxLogLastError("GetObject(hfont)"); + wxLogLastError(wxT("GetObject(hfont)")); } // GDI wants the angle in tenth of degree @@ -867,7 +883,7 @@ void wxDC::DoDrawRotatedText(const wxString& text, hfont = ::CreateFontIndirect(&lf); if ( !hfont ) { - wxLogLastError("CreateFont"); + wxLogLastError(wxT("CreateFont")); } else { @@ -1020,7 +1036,23 @@ void wxDC::SetBrush(const wxBrush& brush) if (m_brush.Ok()) { - if (m_brush.GetResourceHandle()) + // to make sure the brush is alligned with the logical coordinates + wxBitmap *stipple = m_brush.GetStipple(); + if ( stipple && stipple->Ok() ) + { +#ifdef __WIN32__ + ::SetBrushOrgEx(GetHdc(), + m_deviceOriginX % stipple->GetWidth(), + m_deviceOriginY % stipple->GetHeight(), + NULL); // don't need previous brush origin +#else + ::SetBrushOrg(GetHdc(), + m_deviceOriginX % stipple->GetWidth(), + m_deviceOriginY % stipple->GetHeight()); +#endif + } + + if ( m_brush.GetResourceHandle() ) { HBRUSH b = 0; b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle()); @@ -1083,6 +1115,7 @@ void wxDC::SetBackgroundMode(int mode) ::SetBkMode(GetHdc(), TRANSPARENT); else ::SetBkMode(GetHdc(), OPAQUE); + Last change: AC 29 Jan 101 8:54 pm */ } @@ -1301,7 +1334,9 @@ void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y) wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const { - return (wxCoord) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX) - m_logicalOriginX); + double xRel = x - m_deviceOriginX; + xRel /= m_logicalScaleX*m_userScaleX*m_signX*m_scaleX; + return (wxCoord)(xRel + m_logicalOriginX); } wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const @@ -1311,7 +1346,9 @@ wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const { - return (wxCoord) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY) - m_logicalOriginY); + double yRel = y - m_deviceOriginY; + yRel /= m_logicalScaleY*m_userScaleY*m_signY*m_scaleY; + return (wxCoord)(yRel + m_logicalOriginY); } wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const @@ -1408,7 +1445,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, // of the mask which is also contrary to the Windows one) success = ::MaskBlt(GetHdc(), xdest, ydest, width, height, GetHdcOf(*source), xsrc, ysrc, - (HBITMAP)mask->GetMaskBitmap(), 0, 0, + (HBITMAP)mask->GetMaskBitmap(), xsrc, ysrc, MAKEROP4(dwRop, DSTCOPY)) != 0; if ( !success ) @@ -1427,14 +1464,14 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, GetHdc(), xdest, ydest, SRCCOPY) ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } // copy src to buffer using selected raster op if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, GetHdcOf(*source), xsrc, ysrc, dwRop) ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } // set masked area in buffer to BLACK (pixel value 0) @@ -1443,7 +1480,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, dc_mask, xsrc, ysrc, SRCAND) ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } // set unmasked area in dest to BLACK @@ -1452,7 +1489,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height, dc_mask, xsrc, ysrc, SRCAND) ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values ::SetTextColor(GetHdc(), prevCol); @@ -1463,7 +1500,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, dc_buffer, 0, 0, SRCPAINT) != 0; if ( !success ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } // tidy up temporary DCs and bitmap @@ -1481,7 +1518,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, GetHdcOf(*source), xsrc, ysrc, dwRop) != 0; if ( !success ) { - wxLogLastError("BitBlt"); + wxLogLastError(wxT("BitBlt")); } } ::SetTextColor(GetHdc(), old_textground); @@ -1532,239 +1569,4 @@ void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y, } #endif -// --------------------------------------------------------------------------- -// spline drawing code -// --------------------------------------------------------------------------- - -#if wxUSE_SPLINES - -class wxSpline: public wxObject -{ -public: - int type; - wxList *points; - - wxSpline(wxList *list); - void DeletePoints(); - - // Doesn't delete points - ~wxSpline(); -}; - -void wx_draw_open_spline(wxDC *dc, wxSpline *spline); - -void wx_quadratic_spline(double a1, double b1, double a2, double b2, - double a3, double b3, double a4, double b4); -void wx_clear_stack(); -int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3, - double *y3, double *x4, double *y4); -void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, - double x4, double y4); -static bool wx_spline_add_point(double x, double y); -static void wx_spline_draw_point_array(wxDC *dc); -wxSpline *wx_make_spline(int x1, int y1, int x2, int y2, int x3, int y3); - -void wxDC::DoDrawSpline(wxList *list) -{ - wxSpline spline(list); - - wx_draw_open_spline(this, &spline); -} - -wxList wx_spline_point_list; - -void wx_draw_open_spline(wxDC *dc, wxSpline *spline) -{ - wxPoint *p; - double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4; - double x1, y1, x2, y2; - - wxNode *node = spline->points->First(); - p = (wxPoint *)node->Data(); - - x1 = p->x; - y1 = p->y; - - node = node->Next(); - p = (wxPoint *)node->Data(); - - x2 = p->x; - y2 = p->y; - cx1 = (double)((x1 + x2) / 2); - cy1 = (double)((y1 + y2) / 2); - cx2 = (double)((cx1 + x2) / 2); - cy2 = (double)((cy1 + y2) / 2); - - wx_spline_add_point(x1, y1); - - while ((node = node->Next()) != NULL) - { - p = (wxPoint *)node->Data(); - x1 = x2; - y1 = y2; - x2 = p->x; - y2 = p->y; - cx4 = (double)(x1 + x2) / 2; - cy4 = (double)(y1 + y2) / 2; - cx3 = (double)(x1 + cx4) / 2; - cy3 = (double)(y1 + cy4) / 2; - - wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4); - - cx1 = cx4; - cy1 = cy4; - cx2 = (double)(cx1 + x2) / 2; - cy2 = (double)(cy1 + y2) / 2; - } - - wx_spline_add_point((double)wx_round(cx1), (double)wx_round(cy1)); - wx_spline_add_point(x2, y2); - - wx_spline_draw_point_array(dc); - -} - -/********************* CURVES FOR SPLINES ***************************** - - The following spline drawing routine is from - - "An Algorithm for High-Speed Curve Generation" - by George Merrill Chaikin, - Computer Graphics and Image Processing, 3, Academic Press, - 1974, 346-349. - - and - - "On Chaikin's Algorithm" by R. F. Riesenfeld, - Computer Graphics and Image Processing, 4, Academic Press, - 1975, 304-310. - -***********************************************************************/ - -#define half(z1, z2) ((z1+z2)/2.0) -#define THRESHOLD 5 - -/* iterative version */ - -void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4, - double b4) -{ - register double xmid, ymid; - double x1, y1, x2, y2, x3, y3, x4, y4; - - wx_clear_stack(); - wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4); - - while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) { - xmid = (double)half(x2, x3); - ymid = (double)half(y2, y3); - if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD && - fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) { - wx_spline_add_point((double)wx_round(x1), (double)wx_round(y1)); - wx_spline_add_point((double)wx_round(xmid), (double)wx_round(ymid)); - } else { - wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3), - (double)half(x3, x4), (double)half(y3, y4), x4, y4); - wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2), - (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid); - } - } -} - - -/* utilities used by spline drawing routines */ - - -typedef struct wx_spline_stack_struct { - double x1, y1, x2, y2, x3, y3, x4, y4; -} -Stack; - -#define SPLINE_STACK_DEPTH 20 -static Stack wx_spline_stack[SPLINE_STACK_DEPTH]; -static Stack *wx_stack_top; -static int wx_stack_count; - -void wx_clear_stack() -{ - wx_stack_top = wx_spline_stack; - wx_stack_count = 0; -} - -void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) -{ - wx_stack_top->x1 = x1; - wx_stack_top->y1 = y1; - wx_stack_top->x2 = x2; - wx_stack_top->y2 = y2; - wx_stack_top->x3 = x3; - wx_stack_top->y3 = y3; - wx_stack_top->x4 = x4; - wx_stack_top->y4 = y4; - wx_stack_top++; - wx_stack_count++; -} - -int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, - double *x3, double *y3, double *x4, double *y4) -{ - if (wx_stack_count == 0) - return (0); - wx_stack_top--; - wx_stack_count--; - *x1 = wx_stack_top->x1; - *y1 = wx_stack_top->y1; - *x2 = wx_stack_top->x2; - *y2 = wx_stack_top->y2; - *x3 = wx_stack_top->x3; - *y3 = wx_stack_top->y3; - *x4 = wx_stack_top->x4; - *y4 = wx_stack_top->y4; - return (1); -} - -static bool wx_spline_add_point(double x, double y) -{ - wxPoint *point = new wxPoint; - point->x = (int) x; - point->y = (int) y; - wx_spline_point_list.Append((wxObject*)point); - return TRUE; -} - -static void wx_spline_draw_point_array(wxDC *dc) -{ - dc->DrawLines(&wx_spline_point_list, 0, 0); - wxNode *node = wx_spline_point_list.First(); - while (node) - { - wxPoint *point = (wxPoint *)node->Data(); - delete point; - delete node; - node = wx_spline_point_list.First(); - } -} - -wxSpline::wxSpline(wxList *list) -{ - points = list; -} - -wxSpline::~wxSpline() -{ -} - -void wxSpline::DeletePoints() -{ - for(wxNode *node = points->First(); node; node = points->First()) - { - wxPoint *point = (wxPoint *)node->Data(); - delete point; - delete node; - } - delete points; -} - - -#endif // wxUSE_SPLINES