<html><head><style type="text/css"></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><DIV>Hakki,</DIV> <DIV> </DIV> <DIV>That worked perfectly -- I didn't realize I was making more work for myself than I realized. And I appreciate you making it more cross-platform.. Point noted. :)</DIV> <DIV> </DIV> <DIV>Sean  </DIV>-- <DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"> <DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">----- Original Message ---- From: Hakki Dogusan <dogusanh@tr.net> To: cairo@cairographics.org Sent: Saturday, January 26, 2008 1:48:35 PM Subject: Re: [cairo] Cairo + Win32 GDI + wxWidgets? Hi, (Code modified inline) Sean Dunn yazmšē: > Hi all, > >  > > I just started using wxWidgets with Cairo. My target platform right now > is Win32. I'm pretty new to wxWidgets, Cairo, and GDI, and I'm madly > trying to grok it all. > >  > > I'm having trouble getting the following code to show anything, and I'm > not sure what's wrong. It's supposed to create a Cairo surface based on > the win32 surface, draw to it, and then bitblt it back to my window (a > combination of gradients that cover the surface). Nothing shows up, > though. This sample is based on the Docview wxWidgets sample, and the > Gradient Cairo sample. > >  > > I'm looking for pointers and perhaps any online resources that discuss > using Cairo/Win32GDI/wxWidgets all at once (it doesn't seem to be a > popular combination, most seem to be using GTK/Cairo). Also, what is the > most efficient manner for drawing to GDI surfaces? In this case, I'm > doing a bitblt of a buffer.. But is there a way to draw directly with > double buffering? > >  > cairo_t* CreateContext(wxDC* dc) { #ifdef __WXMSW__ //#if CAIRO_HAS_WIN32_SURFACE     HDC hdc = (HDC)dc->GetHDC();     cairo_t *cr = cairo_create(cairo_win32_surface_create( hdc ));     return cr; #endif #ifdef __WXGTK__ //#ifdef GDK_WINDOWING_X11     GdkDrawable *drawable = dc->m_window;     cairo_t *cr = gdk_cairo_create( drawable ) ;     return cr; #endif     return NULL; } > void MyView::OnDraw(wxDC *dc) > { /******************************************************************* >      // wxFrame* m_frame >      HWND hWnd = (HWND)m_frame->GetHWND(); > >      PAINTSTRUCT ps; >      HDC hDc = BeginPaint(hWnd, &ps); >      RECT rc; >      BOOL succ = GetClientRect(hWnd, &rc); > >      long width = rc.right - rc.left; >      long height = rc.bottom - rc.top; >      long x = rc.left; >      long y = rc.top; > >      HDC hBuffer = CreateCompatibleDC(hDc); >      HBITMAP hBitmap = CreateCompatibleBitmap(hDc,width,height); >      HGDIOBJ hOldBitmap = SelectObject(hBuffer, hBitmap); > >  > >      //cairo > >      cairo_surface_t* surf = cairo_win32_surface_create(hBuffer); >      cairo_t* ctx = cairo_create(surf); *******************************************************************/     wxCoord x = 0, y = 0;     wxCoord width, height;     dc.GetSize(&width, &height);     cairo_t* ctx = CreateContext(dc);     if (ctx == NULL) return; > >      cairo_pattern_t *pat; > >      pat = cairo_pattern_create_linear (0.0, 0.0,  0.0, (double)height); >      cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 0, 1); >      cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1); >      cairo_rectangle (ctx, 0, 0, (double)width, (double)height); >      cairo_set_source (ctx, pat); >      cairo_fill (ctx); >      cairo_pattern_destroy (pat); > >      pat = cairo_pattern_create_radial (115.2, 102.4, 25.6, >                102.4,  102.4, 128.0); >      cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1); >      cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 0, 1); >      cairo_set_source (ctx, pat); >      cairo_arc (ctx, 128.0, 128.0, 76.8, 0, 2 * M_PI); >      cairo_fill (ctx); >      cairo_pattern_destroy (pat); > /****************************************************************** >      cairo_surface_finish(surf); > >  > >      BitBlt(hDc, 0, 0, width,  height, hBuffer, x, y, SRCCOPY); > >      SelectObject( hBuffer, hOldBitmap ); >      DeleteObject( hBitmap ); >      DeleteDC( hBuffer ); > >      EndPaint(hWnd, &ps);      *******************************************************************/     cairo_destroy (ctx); > } > >  > > Any help is appreciated..! > >  > > Thank you, > Sean > >  -- Regards, Hakki Dogusan _______________________________________________ cairo mailing list <A href="mailto:cairo@cairographics.org" ymailto="mailto:cairo@cairographics.org">cairo@cairographics.org</A> <A href="http://lists.cairographics.org/mailman/listinfo/cairo" target=_blank>http://lists.cairographics.org/mailman/listinfo/cairo</A></DIV> </DIV></div></body></html>