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Implemented wxGraphicsContext created from wxEnhMetaFileDC for Cairo renderer (wxMSW).

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This commit is contained in:
Artur Wieczorek 2016-04-14 20:44:34 +02:00
parent ba5a0a3878
commit c911f737e3
1 changed files with 47 additions and 11 deletions
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58
src/generic/graphicc.cpp
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@ -40,6 +40,9 @@ bool wxCairoInit();
#include "wx/private/graphics.h"
#include "wx/rawbmp.h"
#include "wx/vector.h"
#if defined(__WXMSW__) && wxUSE_ENH_METAFILE
#include "wx/msw/enhmeta.h"
#endif
using namespace std;
@ -415,6 +418,9 @@ public:
wxCairoContext( wxGraphicsRenderer* renderer, GdkWindow *window );
#endif
#ifdef __WXMSW__
#if wxUSE_ENH_METAFILE
wxCairoContext(wxGraphicsRenderer* renderer, const wxEnhMetaFileDC& dc);
#endif // wxUSE_ENH_METAFILE
wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
wxCairoContext(wxGraphicsRenderer* renderer, HWND hWnd);
#endif
@ -491,7 +497,9 @@ protected:
virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y ) wxOVERRIDE;
void Init(cairo_t *context);
void ApplyTransformFromDC(const wxDC& dc);
enum ApplyTransformMode { Apply_directly, Apply_scaled_dev_origin };
void ApplyTransformFromDC(const wxDC& dc, ApplyTransformMode mode = Apply_directly);
#ifdef __WXQT__
QPainter* m_qtPainter;
@ -2010,6 +2018,29 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkWindow *window
#endif
#ifdef __WXMSW__
#if wxUSE_ENH_METAFILE
wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer, const wxEnhMetaFileDC& dc)
: wxGraphicsContext(renderer)
{
// wxMSW contexts always use MM_ANISOTROPIC, which messes up
// text rendering when printing using Cairo. Switch it to MM_TEXT
// map mode to avoid this problem.
HDC hdc = (HDC)dc.GetHDC();
::SetMapMode(hdc, MM_TEXT);
m_mswSurface = cairo_win32_printing_surface_create(hdc);
Init( cairo_create(m_mswSurface) );
wxSize sz = dc.GetSize();
m_width = sz.x;
m_height = sz.y;
// Transfer transformation settings from source DC to Cairo context on our own.
// Since we switched from MM_ANISOTROPIC to MM_TEXT mapping mode
// we have to apply rescaled DC's device origin to Cairo context.
ApplyTransformFromDC(dc, Apply_scaled_dev_origin);
}
#endif // wxUSE_ENH_METAFILE
wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
: wxGraphicsContext(renderer)
{
@ -2158,20 +2189,26 @@ void wxCairoContext::Init(cairo_t *context)
}
}
void wxCairoContext::ApplyTransformFromDC(const wxDC& dc)
void wxCairoContext::ApplyTransformFromDC(const wxDC& dc, ApplyTransformMode mode)
{
// Transfer transformation settings from source DC to Cairo context
// and store it as an internal transformation
// (which is not going to be exposed).
wxPoint org = dc.GetDeviceOrigin();
cairo_matrix_translate(&m_internalTransform, org.x, org.y);
double sx, sy;
dc.GetUserScale(&sx, &sy);
double lsx, lsy;
dc.GetLogicalScale(&lsx, &lsy);
sx *= lsx;
sy *= lsy;
wxPoint org = dc.GetDeviceOrigin();
if ( mode == Apply_scaled_dev_origin )
// This is used when mapping mode has been changed
// under wxMSW from MM_ANISOTROPIC to MM_TEXT.
cairo_matrix_translate(&m_internalTransform, org.x/sx, org.y/sy);
else
cairo_matrix_translate(&m_internalTransform, org.x, org.y);
cairo_matrix_scale(&m_internalTransform, sx, sy);
org = dc.GetLogicalOrigin();
@ -2733,14 +2770,13 @@ wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
}
#endif
#ifdef __WXMSW__
#if wxUSE_ENH_METAFILE
wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
#if defined(__WXMSW__) && wxUSE_ENH_METAFILE
wxGraphicsContext * wxCairoRenderer::CreateContext(const wxEnhMetaFileDC& dc)
{
return NULL;
ENSURE_LOADED_OR_RETURN(NULL);
return new wxCairoContext(this, dc);
}
#endif
#endif
#endif // __WXMSW__ && wxUSE_ENH_METAFILE
wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext(void * context)
{