KiCad PCB EDA Suite
hidpi_gl_canvas.cpp
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1 /*
2  * This program source code file is part of KICAD, a free EDA CAD application.
3  *
4  * Copyright (C) 2017 Bernhard Stegmaier <stegmaier@sw-systems.de>
5  * Copyright (C) 2016-2017 Kicad Developers, see change_log.txt for contributors.
6  *
7  * Base class for HiDPI aware wxGLCanvas implementations.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
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26 
27 #include <gal/hidpi_gl_canvas.h>
28 
29 #include <dpi_scaling.h>
30 
31 
32 HIDPI_GL_CANVAS::HIDPI_GL_CANVAS( wxWindow* parent, wxWindowID id, const int* attribList,
33  const wxPoint& pos, const wxSize& size, long style, const wxString& name,
34  const wxPalette& palette )
35  : wxGLCanvas( parent, id, attribList, pos, size, style, name, palette ),
36  m_scale_factor( DPI_SCALING::GetDefaultScaleFactor() )
37 {
38 #ifdef RETINA_OPENGL_PATCH
39  SetViewWantsBestResolution( true );
40 #endif
41 }
42 
43 
45 {
46  wxSize size = wxGLCanvas::GetClientSize();
47 
48  const float scaleFactor = GetBackingScaleFactor();
49  size.x *= scaleFactor;
50  size.y *= scaleFactor;
51 
52  return size;
53 }
54 
55 
57 {
58 #ifdef RETINA_OPENGL_PATCH
59  // this is ugly, but original method isn't marked const although it doesn't modify anything
60  // => clean up when it officially has arrived in wxWidgets
61  return static_cast< wxGLCanvas* >( const_cast< HIDPI_GL_CANVAS* >( this ))->GetBackingScaleFactor();
62 #else
63 
64  // Return the cached value (which originally was set from config or automatically)
65  return m_scale_factor;
66 #endif
67 }
68 
69 
70 void HIDPI_GL_CANVAS::SetScaleFactor( double aNewScaleFactor )
71 {
72  m_scale_factor = aNewScaleFactor;
73 }
74 
75 
77 {
78  return m_scale_factor;
79 }
virtual wxSize GetNativePixelSize() const
double GetScaleFactor() const
Get the current scale factor.
Class to handle configuration and automatic determination of the DPI scale to use for canvases.
Definition: dpi_scaling.h:35
HIDPI_GL_CANVAS(wxWindow *parent, wxWindowID id=wxID_ANY, const int *attribList=NULL, const wxPoint &pos=wxDefaultPosition, const wxSize &size=wxDefaultSize, long style=0, const wxString &name=wxGLCanvasName, const wxPalette &palette=wxNullPalette)
double m_scale_factor
The current scale factor (e.g.
const char * name
Definition: DXF_plotter.cpp:61
virtual float GetBackingScaleFactor() const
void SetScaleFactor(double aFactor)
Set the canvas scale factor, probably for a hi-DPI display.