1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/osx/carbon/dcclient.cpp
3 // Purpose: wxClientDCImpl class
4 // Author: Stefan Csomor
5 // Modified by:
6 // Created: 01/02/97
7 // Copyright: (c) Stefan Csomor
8 // Licence: wxWindows licence
9 /////////////////////////////////////////////////////////////////////////////
10
11 #include "wx/wxprec.h"
12
13 #include "wx/dcclient.h"
14
15 #ifndef WX_PRECOMP
16 #include "wx/log.h"
17 #include "wx/window.h"
18 #include "wx/dcmemory.h"
19 #include "wx/settings.h"
20 #include "wx/toplevel.h"
21 #include "wx/math.h"
22 #include "wx/region.h"
23 #endif
24
25 #include "wx/graphics.h"
26 #include "wx/rawbmp.h"
27 #include "wx/osx/private.h"
28 #include "wx/osx/dcclient.h"
29
30 //-----------------------------------------------------------------------------
31 // wxWindowDCImpl
32 //-----------------------------------------------------------------------------
33
IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl,wxGCDCImpl)34 IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxGCDCImpl)
35
36 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner )
37 : wxGCDCImpl( owner )
38 {
39 m_release = false;
40 }
41
42
wxWindowDCImpl(wxDC * owner,wxWindow * window)43 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
44 : wxGCDCImpl( owner )
45 {
46 m_window = window;
47
48 m_ok = true ;
49
50 m_window->GetSize( &m_width , &m_height);
51 if ( !m_window->IsShownOnScreen() )
52 m_width = m_height = 0;
53
54 CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
55
56 m_release = false;
57 if ( cg == NULL )
58 {
59 SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
60 m_contentScaleFactor = window->GetContentScaleFactor();
61 SetDeviceOrigin(-window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize());
62 }
63 else
64 {
65 // determine content scale
66 CGRect userrect = CGRectMake(0, 0, 10, 10);
67 CGRect devicerect;
68 devicerect = CGContextConvertRectToDeviceSpace(cg, userrect);
69 m_contentScaleFactor = devicerect.size.height / userrect.size.height;
70
71 CGContextSaveGState( cg );
72 m_release = true ;
73 // make sure the context is having its origin at the wx-window coordinates of the
74 // view (read at the top of window.cpp about the differences)
75 if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
76 CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
77
78 wxGraphicsContext* context = wxGraphicsContext::CreateFromNative( cg );
79 context->EnableOffset(true);
80 SetGraphicsContext( context );
81 }
82 DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
83
84 SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
85
86 SetFont( window->GetFont() ) ;
87 }
88
~wxWindowDCImpl()89 wxWindowDCImpl::~wxWindowDCImpl()
90 {
91 if ( m_release )
92 {
93 // this must not necessarily be the current context, we must restore the state of the
94 // cg we started with above (before the CGContextTranslateCTM call)
95 CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
96 CGContextRestoreGState(cg);
97 }
98 }
99
DoGetSize(int * width,int * height) const100 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
101 {
102 if ( width )
103 *width = m_width;
104 if ( height )
105 *height = m_height;
106 }
107
108 #if wxOSX_USE_CARBON
DoGetAsBitmap(const wxRect * subrect) const109 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
110 {
111 // wxScreenDC is derived from wxWindowDC, so a screen dc will
112 // call this method when a Blit is performed with it as a source.
113 if (!m_window)
114 return wxNullBitmap;
115
116 ControlRef handle = (ControlRef) m_window->GetHandle();
117 if ( !handle )
118 return wxNullBitmap;
119
120 HIRect rect;
121 CGImageRef image;
122 CGContextRef context;
123
124 HIViewCreateOffscreenImage( handle, 0, &rect, &image);
125
126
127 int width = subrect != NULL ? subrect->width : (int)rect.size.width;
128 int height = subrect != NULL ? subrect->height : (int)rect.size.height ;
129
130 wxBitmap bmp = wxBitmap(width, height, 32);
131
132 context = (CGContextRef)bmp.GetHBITMAP();
133
134 CGContextSaveGState(context);
135
136 CGContextTranslateCTM( context, 0, height );
137 CGContextScaleCTM( context, 1, -1 );
138
139 if ( subrect )
140 rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
141 CGContextDrawImage( context, rect, image );
142
143 CGContextRestoreGState(context);
144 return bmp;
145 }
146 #endif
147
148 /*
149 * wxClientDCImpl
150 */
151
IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl,wxWindowDCImpl)152 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
153
154 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
155 : wxWindowDCImpl( owner )
156 {
157 }
158
wxClientDCImpl(wxDC * owner,wxWindow * window)159 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
160 wxWindowDCImpl( owner, window )
161 {
162 wxCHECK_RET( window, wxT("invalid window in wxClientDCImpl") );
163 wxPoint origin = window->GetClientAreaOrigin() ;
164 m_window->GetClientSize( &m_width , &m_height);
165 if ( !m_window->IsShownOnScreen() )
166 m_width = m_height = 0;
167
168 int x0,y0;
169 DoGetDeviceOrigin(&x0,&y0);
170 SetDeviceOrigin( origin.x + x0, origin.y + y0 );
171
172 DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
173 }
174
~wxClientDCImpl()175 wxClientDCImpl::~wxClientDCImpl()
176 {
177 if( GetGraphicsContext() && GetGraphicsContext()->GetNativeContext() && !m_release )
178 Flush();
179 }
180
181 /*
182 * wxPaintDCImpl
183 */
184
IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl,wxWindowDCImpl)185 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
186
187 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
188 : wxWindowDCImpl( owner )
189 {
190 }
191
192 #if wxDEBUG_LEVEL
IsGLCanvas(wxWindow * window)193 static bool IsGLCanvas( wxWindow * window )
194 {
195 // If the wx gl library isn't loaded then ciGLCanvas will be NULL.
196 static const wxClassInfo* const ciGLCanvas = wxClassInfo::FindClass("wxGLCanvas");
197 return ciGLCanvas && window->IsKindOf(ciGLCanvas);
198 }
199 #endif
200
wxPaintDCImpl(wxDC * owner,wxWindow * window)201 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
202 wxWindowDCImpl( owner, window )
203 {
204 // With macOS 10.14, wxGLCanvas windows have a NULL CGContextRef.
205 wxASSERT_MSG( window->MacGetCGContextRef() != NULL || IsGLCanvas(window), wxT("using wxPaintDC without being in a native paint event") );
206 wxPoint origin = window->GetClientAreaOrigin() ;
207 m_window->GetClientSize( &m_width , &m_height);
208 SetDeviceOrigin( origin.x, origin.y );
209 DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
210 }
211
~wxPaintDCImpl()212 wxPaintDCImpl::~wxPaintDCImpl()
213 {
214 }
215