wxWidgets/include/wx/dcsvg.h
2019-04-10 23:37:34 +02:00

279 lines
9.4 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: wx/dcsvg.h
// Purpose: wxSVGFileDC
// Author: Chris Elliott
// Modified by:
// Created:
// Copyright: (c) Chris Elliott
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DCSVG_H_
#define _WX_DCSVG_H_
#include "wx/string.h"
#include "wx/dc.h"
#if wxUSE_SVG
#include "wx/scopedptr.h"
#define wxSVGVersion wxT("v0101")
class WXDLLIMPEXP_FWD_BASE wxFileOutputStream;
class WXDLLIMPEXP_FWD_CORE wxSVGFileDC;
// Base class for bitmap handlers used by wxSVGFileDC, used by the standard
// "embed" and "link" handlers below but can also be used to create a custom
// handler.
class WXDLLIMPEXP_CORE wxSVGBitmapHandler
{
public:
// Write the representation of the given bitmap, appearing at the specified
// position, to the provided stream.
virtual bool ProcessBitmap(const wxBitmap& bitmap,
wxCoord x, wxCoord y,
wxOutputStream& stream) const = 0;
virtual ~wxSVGBitmapHandler() {}
};
// Predefined standard bitmap handler: creates a file, stores the bitmap in
// this file and uses the file URI in the generated SVG.
class WXDLLIMPEXP_CORE wxSVGBitmapFileHandler : public wxSVGBitmapHandler
{
public:
virtual bool ProcessBitmap(const wxBitmap& bitmap,
wxCoord x, wxCoord y,
wxOutputStream& stream) const wxOVERRIDE;
};
// Predefined handler which embeds the bitmap (base64-encoding it) inside the
// generated SVG file.
class WXDLLIMPEXP_CORE wxSVGBitmapEmbedHandler : public wxSVGBitmapHandler
{
public:
virtual bool ProcessBitmap(const wxBitmap& bitmap,
wxCoord x, wxCoord y,
wxOutputStream& stream) const wxOVERRIDE;
};
class WXDLLIMPEXP_CORE wxSVGFileDCImpl : public wxDCImpl
{
public:
wxSVGFileDCImpl(wxSVGFileDC *owner, const wxString &filename,
int width = 320, int height = 240, double dpi = 72.0,
const wxString &title = wxString());
virtual ~wxSVGFileDCImpl();
bool IsOk() const wxOVERRIDE { return m_OK; }
virtual bool CanDrawBitmap() const wxOVERRIDE { return true; }
virtual bool CanGetTextExtent() const wxOVERRIDE { return true; }
virtual int GetDepth() const wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::GetDepth Call not implemented"));
return -1;
}
virtual void Clear() wxOVERRIDE;
virtual void DestroyClippingRegion() wxOVERRIDE;
virtual wxCoord GetCharHeight() const wxOVERRIDE;
virtual wxCoord GetCharWidth() const wxOVERRIDE;
#if wxUSE_PALETTE
virtual void SetPalette(const wxPalette& WXUNUSED(palette)) wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::SetPalette not implemented"));
}
#endif
virtual void SetLogicalFunction(wxRasterOperationMode WXUNUSED(function)) wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::SetLogicalFunction Call not implemented"));
}
virtual wxRasterOperationMode GetLogicalFunction() const wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::GetLogicalFunction() not implemented"));
return wxCOPY;
}
virtual void SetLogicalOrigin(wxCoord x, wxCoord y) wxOVERRIDE
{
wxDCImpl::SetLogicalOrigin(x, y);
m_graphics_changed = true;
}
virtual void SetDeviceOrigin(wxCoord x, wxCoord y) wxOVERRIDE
{
wxDCImpl::SetDeviceOrigin(x, y);
m_graphics_changed = true;
}
virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) wxOVERRIDE
{
wxDCImpl::SetAxisOrientation(xLeftRight, yBottomUp);
m_graphics_changed = true;
}
virtual void SetBackground(const wxBrush &brush) wxOVERRIDE;
virtual void SetBackgroundMode(int mode) wxOVERRIDE;
virtual void SetBrush(const wxBrush& brush) wxOVERRIDE;
virtual void SetFont(const wxFont& font) wxOVERRIDE;
virtual void SetPen(const wxPen& pen) wxOVERRIDE;
virtual void* GetHandle() const wxOVERRIDE { return NULL; }
void SetBitmapHandler(wxSVGBitmapHandler* handler);
private:
virtual bool DoGetPixel(wxCoord, wxCoord, wxColour *) const wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::DoGetPixel Call not implemented"));
return true;
}
virtual bool DoBlit(wxCoord, wxCoord, wxCoord, wxCoord, wxDC *,
wxCoord, wxCoord, wxRasterOperationMode = wxCOPY,
bool = 0, int = -1, int = -1) wxOVERRIDE;
virtual void DoCrossHair(wxCoord, wxCoord) wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::CrossHair Call not implemented"));
}
virtual void DoDrawArc(wxCoord, wxCoord, wxCoord, wxCoord, wxCoord, wxCoord) wxOVERRIDE;
virtual void DoDrawBitmap(const wxBitmap &, wxCoord, wxCoord, bool = false) wxOVERRIDE;
virtual void DoDrawCheckMark(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
double sa, double ea) wxOVERRIDE;
virtual void DoDrawIcon(const wxIcon &, wxCoord, wxCoord) wxOVERRIDE;
virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) wxOVERRIDE;
virtual void DoDrawLines(int n, const wxPoint points[],
wxCoord xoffset = 0, wxCoord yoffset = 0) wxOVERRIDE;
virtual void DoDrawPoint(wxCoord, wxCoord) wxOVERRIDE;
virtual void DoDrawPolygon(int n, const wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle) wxOVERRIDE;
virtual void DoDrawPolyPolygon(int n, const int count[], const wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
wxPolygonFillMode fillStyle) wxOVERRIDE;
virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
double angle) wxOVERRIDE;
virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
wxCoord w, wxCoord h,
double radius = 20) wxOVERRIDE;
virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) wxOVERRIDE;
virtual bool DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
const wxColour& WXUNUSED(col),
wxFloodFillStyle WXUNUSED(style) = wxFLOOD_SURFACE) wxOVERRIDE
{
wxFAIL_MSG(wxT("wxSVGFILEDC::DoFloodFill Call not implemented"));
return false;
}
virtual void DoGetSize(int * x, int *y) const wxOVERRIDE
{
if ( x )
*x = m_width;
if ( y )
*y = m_height;
}
virtual void DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h,
wxCoord *descent = NULL,
wxCoord *externalLeading = NULL,
const wxFont *font = NULL) const wxOVERRIDE;
virtual void DoSetDeviceClippingRegion(const wxRegion& region) wxOVERRIDE
{
DoSetClippingRegion(region.GetBox().x, region.GetBox().y,
region.GetBox().width, region.GetBox().height);
}
virtual void DoSetClippingRegion(int x, int y, int width, int height) wxOVERRIDE;
virtual void DoGetSizeMM(int *width, int *height) const wxOVERRIDE;
virtual wxSize GetPPI() const wxOVERRIDE;
void Init(const wxString &filename, int width, int height,
double dpi, const wxString &title);
void write(const wxString &s);
private:
// If m_graphics_changed is true, close the current <g> element and start a
// new one for the last pen/brush change.
void NewGraphicsIfNeeded();
// Open a new graphics group setting up all the attributes according to
// their current values in wxDC.
void DoStartNewGraphics();
wxString m_filename;
int m_sub_images; // number of png format images we have
bool m_OK;
bool m_graphics_changed; // set by Set{Brush,Pen}()
int m_width, m_height;
double m_dpi;
wxScopedPtr<wxFileOutputStream> m_outfile;
wxScopedPtr<wxSVGBitmapHandler> m_bmp_handler; // class to handle bitmaps
// The clipping nesting level is incremented by every call to
// SetClippingRegion() and reset when DestroyClippingRegion() is called.
size_t m_clipNestingLevel;
// Unique ID for every clipping graphics group: this is simply always
// incremented in each SetClippingRegion() call.
size_t m_clipUniqueId;
wxDECLARE_ABSTRACT_CLASS(wxSVGFileDCImpl);
};
class WXDLLIMPEXP_CORE wxSVGFileDC : public wxDC
{
public:
wxSVGFileDC(const wxString& filename,
int width = 320,
int height = 240,
double dpi = 72.0,
const wxString& title = wxString())
: wxDC(new wxSVGFileDCImpl(this, filename, width, height, dpi, title))
{
}
// wxSVGFileDC-specific methods:
// Use a custom bitmap handler: takes ownership of the handler.
void SetBitmapHandler(wxSVGBitmapHandler* handler);
};
#endif // wxUSE_SVG
#endif // _WX_DCSVG_H_