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1/////////////////////////////////////////////////////////////////////////////
2// Name: src/cocoa/dcmemory.mm
3// Purpose: wxMemoryDC class
4// Author: David Elliott
5// Modified by:
6// Created: 2003/03/16
7// RCS-ID: $Id$
8// Copyright: (c) 2002 David Elliott
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12#include "wx/dcmemory.h"
2c23fe91 13#include "wx/log.h"
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14
15#import <AppKit/NSImage.h>
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16#import <AppKit/NSAffineTransform.h>
17#import <AppKit/NSGraphicsContext.h>
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18
19//-----------------------------------------------------------------------------
20// wxMemoryDC
21//-----------------------------------------------------------------------------
22
23IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxDC)
24
25wxMemoryDC::wxMemoryDC(void)
26{
27 m_cocoaNSImage = NULL;
28 m_ok = false;
29}
30
31wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
32{
33 m_cocoaNSImage = NULL;
34 m_ok = false;
35}
36
37wxMemoryDC::~wxMemoryDC(void)
38{
39 CocoaUnwindStackAndLoseFocus();
40 [m_cocoaNSImage release];
41}
42
43bool wxMemoryDC::CocoaLockFocus()
44{
45 if(m_cocoaNSImage)
46 {
e3d7f770 47 [m_cocoaNSImage lockFocus];
28f3fe51 48 sm_cocoaDCStack.Insert(this);
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49 m_cocoaFlipped = [m_cocoaNSImage isFlipped];
50 m_cocoaHeight = [m_cocoaNSImage size].height;
51 CocoaApplyTransformations();
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52 return true;
53 }
54 return false;
55}
56
57bool wxMemoryDC::CocoaUnlockFocus()
58{
59 [m_cocoaNSImage unlockFocus];
60 return true;
61}
62
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63// NOTE: The AppKit is unable to draw onto an NSBitmapImageRep so we must
64// instead copy the data to an offscreen window, then copy it back
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65void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
66{
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67 if(m_selectedBitmap.Ok())
68 {
69 CocoaTakeFocus();
70 wxASSERT(m_cocoaNSImage);
71 m_selectedBitmap.SetNSBitmapImageRep(
72 [[NSBitmapImageRep alloc]
73 initWithFocusedViewRect:NSMakeRect(0.0,0.0,
74 m_selectedBitmap.GetWidth(),
75 m_selectedBitmap.GetHeight())]);
76 }
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77 CocoaUnwindStackAndLoseFocus();
78 [m_cocoaNSImage release];
79 m_cocoaNSImage = nil;
80 m_selectedBitmap = bitmap;
81 if(m_selectedBitmap.Ok())
82 {
e3d7f770 83 // Create an offscreen window of the same size
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84 m_cocoaNSImage = [[NSImage alloc]
85 initWithSize:NSMakeSize(m_selectedBitmap.GetWidth(),
86 m_selectedBitmap.GetHeight())];
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87
88 // Now copy the data
89 NSImage *nsimage = [[NSImage alloc]
90 initWithSize:NSMakeSize(m_selectedBitmap.GetWidth(),
91 m_selectedBitmap.GetHeight())];
92 [nsimage addRepresentation: const_cast<wxBitmap&>(m_selectedBitmap).GetNSBitmapImageRep()];
5a5797ca 93 [m_cocoaNSImage lockFocus];
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94 [nsimage drawAtPoint: NSMakePoint(0,0)
95 fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
96 operation: NSCompositeCopy
97 fraction: 1.0];
5a5797ca 98 [m_cocoaNSImage unlockFocus];
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99
100 [nsimage release];
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101 }
102}
103
104void wxMemoryDC::DoGetSize( int *width, int *height ) const
105{
106 if(width)
107 *width = m_selectedBitmap.GetWidth();
108 if(height)
109 *height = m_selectedBitmap.GetHeight();
110}
111
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112bool wxMemoryDC::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
113 wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
114 int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
115{
116 if(!m_selectedBitmap.Ok())
117 return false;
118
119 NSAffineTransform *transform = [NSAffineTransform transform];
120 [transform translateXBy:xdest yBy:ydest];
121
122 NSAffineTransform *flipTransform = [NSAffineTransform transform];
123 /* x' = 1x + 0y + 0
124 y' = 0x + -1y + window's height
125 */
126 NSAffineTransformStruct matrix = {
127 1, 0
128 , 0, -1
129 , 0, height
130 };
131 [flipTransform setTransformStruct: matrix];
132
133 NSGraphicsContext *context = [NSGraphicsContext currentContext];
134 [context saveGraphicsState];
135 [transform concat];
136 [flipTransform concat];
137
138 wxLogDebug("[m_cocoaNSImage isFlipped]=%d", [m_cocoaNSImage isFlipped]);
139 [m_cocoaNSImage drawAtPoint: NSMakePoint(0,0)
140 fromRect: NSMakeRect(xsrc,
141 m_selectedBitmap.GetHeight()-height-ysrc,
142 width, height)
143 operation: NSCompositeCopy // FIXME: raster ops
144 fraction: 1.0];
145
146 [context restoreGraphicsState];
147 return false;
148}
149