#include "wx/icon.h"
#endif
+#include "wx/settings.h"
#include "wx/dcprint.h"
#include <string.h>
m_windowExtX = VIEWPORT_EXTENT;
m_windowExtY = VIEWPORT_EXTENT;
-
- m_hDCCount = 0;
}
wxDC::~wxDC()
{
- if ( m_hDC != 0 ) {
+ if ( m_hDC != 0 )
+ {
SelectOldObjects(m_hDC);
- if ( m_bOwnsDC ) {
- if ( m_canvas == NULL )
- ::DeleteDC(GetHdc());
+
+ // if we own the HDC, we delete it, otherwise we just release it
+
+ if ( m_bOwnsDC )
+ {
+ ::DeleteDC(GetHdc());
+ }
+ else // we don't own our HDC
+ {
+ if (m_canvas)
+ {
+ ::ReleaseDC(GetHwndOf(m_canvas), GetHdc());
+ }
else
- ::ReleaseDC((HWND)m_canvas->GetHWND(), GetHdc());
+ {
+ // Must have been a wxScreenDC
+ ::ReleaseDC((HWND) NULL, GetHdc());
+ }
}
}
-
}
// This will select current objects out of the 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::UpdateClipBox()
+{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
+ 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)
+void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_clipping = TRUE;
- IntersectClipRect(GetHdc(), XLOG2DEV(cx), YLOG2DEV(cy),
- XLOG2DEV(cx + cw), YLOG2DEV(cy + ch));
- DO_SET_CLIPPING_BOX()
+
+ // the region coords are always the device ones, so do the translation
+ // manually
+ //
+ // FIXME: possible +/-1 error here, to check!
+ HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x),
+ LogicalToDeviceY(y),
+ LogicalToDeviceX(x + w),
+ LogicalToDeviceY(y + h));
+ if ( !hrgn )
+ {
+ wxLogLastError(_T("CreateRectRgn"));
+ }
+ else
+ {
+ if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
+ {
+ wxLogLastError(_T("SelectClipRgn"));
+ }
+ DeleteObject(hrgn);
+
+ UpdateClipBox();
+ }
}
void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
{
- wxCHECK_RET( region.GetHRGN(), wxT("invalid clipping region") );
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
+ wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
m_clipping = TRUE;
#ifdef __WIN16__
- SelectClipRgn(GetHdc(), (HRGN) region.GetHRGN());
-#else
- ExtSelectClipRgn(GetHdc(), (HRGN) region.GetHRGN(), RGN_AND);
-#endif
+ SelectClipRgn(GetHdc(), GetHrgnOf(region));
+#else // Win32
+ ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
+#endif // Win16/32
- DO_SET_CLIPPING_BOX()
+ UpdateClipBox();
}
void wxDC::DestroyClippingRegion()
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
if (m_clipping && m_hDC)
{
// TODO: this should restore the previous clipping region,
SelectClipRgn(GetHdc(), rgn);
DeleteObject(rgn);
}
+
m_clipping = FALSE;
}
bool wxDC::CanGetTextExtent() const
{
+#ifdef __WXMICROWIN__
+ // TODO Extend MicroWindows' GetDeviceCaps function
+ return TRUE;
+#else
// What sort of display is it?
int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
+#endif
}
int wxDC::GetDepth() const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return 16;
+#endif
+
return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
}
void wxDC::Clear()
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
RECT rect;
if ( m_canvas )
{
void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
col.GetPixel(),
style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return FALSE;
+#endif
+
wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") );
// get the color of the pixel
void wxDC::DoCrossHair(wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxCoord x1 = x-VIEWPORT_EXTENT;
wxCoord y1 = y-VIEWPORT_EXTENT;
wxCoord x2 = x+VIEWPORT_EXTENT;
void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
(void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
(void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
wxCoord x2, wxCoord y2,
wxCoord xc, wxCoord yc)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
double dx = xc - x1;
void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
wxCoord width, wxCoord height)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxCoord x2 = x1 + width,
y2 = y1 + height;
-#if defined(__WIN32__) && !defined(__SC__)
+#if defined(__WIN32__) && !defined(__SC__) && !defined(__WXMICROWIN__)
RECT rect;
rect.left = x1;
rect.top = y1;
HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush);
::SetROP2(GetHdc(), R2_COPYPEN);
Rectangle(GetHdc(), x1, y1, x2, y2);
- MoveTo(GetHdc(), x1, y1);
+ MoveToEx(GetHdc(), x1, y1, NULL);
LineTo(GetHdc(), x2, y2);
- MoveTo(GetHdc(), x2, y1);
+ MoveToEx(GetHdc(), x2, y1, NULL);
LineTo(GetHdc(), x1, y2);
::SelectObject(GetHdc(), hPenOld);
::SelectObject(GetHdc(), hBrushOld);
void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
COLORREF color = 0x00ffffff;
if (m_pen.Ok())
{
void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
// Do things less efficiently if we have offsets
void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// Do things less efficiently if we have offsets
if (xoffset != 0 || yoffset != 0)
{
void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
wxCoord x2 = x + width;
void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
// Now, a negative radius value is interpreted to mean
void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
wxCoord x2 = (x+width);
// 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)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
wxCoord x2 = x + w;
void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
#ifdef __WIN32__
void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
int width = bmp.GetWidth(),
if ( useMask )
{
#ifdef __WIN32__
- HDC hdcMem = ::CreateCompatibleDC(GetHdc());
- ::SelectObject(hdcMem, GetHbitmapOf(bmp));
-
// use MaskBlt() with ROP which doesn't do anything to dst in the mask
// points
- bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
+ // On some systems, MaskBlt succeeds yet is much much slower
+ // than the wxWindows fall-back implementation. So we need
+ // to be able to switch this on and off at runtime.
+ bool ok = FALSE;
+ if (wxSystemSettings::GetOptionInt(wxT("no-maskblt")) == 0)
+ {
+ HDC hdcMem = ::CreateCompatibleDC(GetHdc());
+ ::SelectObject(hdcMem, GetHbitmapOf(bmp));
+
+ ok = ::MaskBlt(GetHdc(), x, y, width, height,
hdcMem, 0, 0,
hbmpMask, 0, 0,
MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
- ::DeleteDC(hdcMem);
+ ::DeleteDC(hdcMem);
+ }
if ( !ok )
#endif // Win32
void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
DrawAnyText(text, x, y);
// update the bounding box
void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// prepare for drawing the text
if ( m_textForegroundColour.Ok() )
SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
wxCoord x, wxCoord y,
double angle)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// we test that we have some font because otherwise we should still use the
// "else" part below to avoid that DrawRotatedText(angle = 180) and
// DrawRotatedText(angle = 0) use different fonts (we can't use the default
{
DoDrawText(text, x, y);
}
+#ifndef __WXMICROWIN__
else
{
// NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
CalcBoundingBox(x, y);
CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
}
+#endif
}
// ---------------------------------------------------------------------------
void wxDC::SetPalette(const wxPalette& palette)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// Set the old object temporarily, in case the assignment deletes an object
// that's not yet selected out.
if (m_oldPalette)
void wxDC::SetFont(const wxFont& the_font)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// Set the old object temporarily, in case the assignment deletes an object
// that's not yet selected out.
if (m_oldFont)
void wxDC::SetPen(const wxPen& pen)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// Set the old object temporarily, in case the assignment deletes an object
// that's not yet selected out.
if (m_oldPen)
void wxDC::SetBrush(const wxBrush& brush)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
// Set the old object temporarily, in case the assignment deletes an object
// that's not yet selected out.
if (m_oldBrush)
void wxDC::SetBackground(const wxBrush& brush)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_backgroundBrush = brush;
if (!m_backgroundBrush.Ok())
void wxDC::SetBackgroundMode(int mode)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_backgroundMode = mode;
// SetBackgroundColour now only refers to text background
void wxDC::SetLogicalFunction(int function)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_logicalFunction = function;
SetRop(m_hDC);
SetROP2(GetHdc(), rop);
}
-bool wxDC::StartDoc(const wxString& message)
+bool wxDC::StartDoc(const wxString& WXUNUSED(message))
{
// We might be previewing, so return TRUE to let it continue.
return TRUE;
wxCoord wxDC::GetCharHeight() const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return 0;
+#endif
+
TEXTMETRIC lpTextMetric;
GetTextMetrics(GetHdc(), &lpTextMetric);
wxCoord wxDC::GetCharWidth() const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return 0;
+#endif
+
TEXTMETRIC lpTextMetric;
GetTextMetrics(GetHdc(), &lpTextMetric);
void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
wxCoord *descent, wxCoord *externalLeading,
- wxFont *theFont) const
+ wxFont *font) const
{
- wxFont *fontToUse = (wxFont*) theFont;
- if (!fontToUse)
- fontToUse = (wxFont*) &m_font;
+#ifdef __WXMICROWIN__
+ if (!GetHDC())
+ {
+ if (x) *x = 0;
+ if (y) *y = 0;
+ if (descent) *descent = 0;
+ if (externalLeading) *externalLeading = 0;
+ return;
+ }
+#endif
+
+ HFONT hfontOld;
+ if ( font )
+ {
+ wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") );
+
+ hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
+ }
+ else // don't change the font
+ {
+ hfontOld = 0;
+ }
SIZE sizeRect;
TEXTMETRIC tm;
- GetTextExtentPoint(GetHdc(), WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
+ GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
GetTextMetrics(GetHdc(), &tm);
if (x) *x = XDEV2LOGREL(sizeRect.cx);
if (y) *y = YDEV2LOGREL(sizeRect.cy);
if (descent) *descent = tm.tmDescent;
if (externalLeading) *externalLeading = tm.tmExternalLeading;
+
+ if ( hfontOld )
+ {
+ ::SelectObject(GetHdc(), hfontOld);
+ }
}
void wxDC::SetMapMode(int mode)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_mappingMode = mode;
int pixel_width = 0;
void wxDC::SetUserScale(double x, double y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_userScaleX = x;
m_userScaleY = y;
void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_signX = xLeftRight ? 1 : -1;
m_signY = yBottomUp ? -1 : 1;
void wxDC::SetSystemScale(double x, double y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_scaleX = x;
m_scaleY = y;
void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_logicalOriginX = x;
m_logicalOriginY = y;
void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_deviceOriginX = x;
m_deviceOriginY = y;
wxDC *source, wxCoord xsrc, wxCoord ysrc,
int rop, bool useMask)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return FALSE;
+#endif
+
wxMask *mask = NULL;
if ( useMask )
{
return FALSE;
}
- bool success;
+ bool success = FALSE;
if (useMask)
{
// transparent, so use "DSTCOPY" ROP for the mask points (the usual
// meaning of fg and bg is inverted which corresponds to wxWin notion
// of the mask which is also contrary to the Windows one)
- success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
+
+ // On some systems, MaskBlt succeeds yet is much much slower
+ // than the wxWindows fall-back implementation. So we need
+ // to be able to switch this on and off at runtime.
+ if (wxSystemSettings::GetOptionInt(wxT("no-maskblt")) == 0)
+ {
+ success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
GetHdcOf(*source), xsrc, ysrc,
(HBITMAP)mask->GetMaskBitmap(), xsrc, ysrc,
MAKEROP4(dwRop, DSTCOPY)) != 0;
+ }
if ( !success )
#endif // Win32
void wxDC::DoGetSize(int *w, int *h) const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
}
void wxDC::DoGetSizeMM(int *w, int *h) const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
}
wxSize wxDC::GetPPI() const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return wxSize();
+#endif
+
int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
// For use by wxWindows only, unless custom units are required.
void wxDC::SetLogicalScale(double x, double y)
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
m_logicalScaleX = x;
m_logicalScaleY = y;
}
float *descent, float *externalLeading,
wxFont *theFont, bool use16bit) const
{
+#ifdef __WXMICROWIN__
+ if (!GetHDC()) return;
+#endif
+
wxCoord x1, y1, descent1, externalLeading1;
GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
*x = x1; *y = y1;
}
#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
projects / wxWidgets.git / blobdiff