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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: wxWidgets licence
10/////////////////////////////////////////////////////////////////////////////
11
12#include "wx/wxprec.h"
13
14#ifndef WX_PRECOMP
15 #include "wx/log.h"
16 #include "wx/dcmemory.h"
17#endif //WX_PRECOMP
18
19#include "wx/cocoa/autorelease.h"
20
21#import <AppKit/NSImage.h>
22#import <AppKit/NSAffineTransform.h>
23#import <AppKit/NSGraphicsContext.h>
24#import <AppKit/NSColor.h>
25#import <AppKit/NSBezierPath.h>
26
27//-----------------------------------------------------------------------------
28// wxMemoryDC
29//-----------------------------------------------------------------------------
30
31IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxDC)
32
33wxMemoryDC::wxMemoryDC(void)
34{
35 m_cocoaNSImage = NULL;
36 m_ok = false;
37}
38
39wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
40{
41 m_cocoaNSImage = NULL;
42 m_ok = false;
43}
44
45wxMemoryDC::~wxMemoryDC(void)
46{
47 CocoaUnwindStackAndLoseFocus();
48 [m_cocoaNSImage release];
49}
50
51bool wxMemoryDC::CocoaLockFocus()
52{
53 if(m_cocoaNSImage)
54 {
55 [m_cocoaNSImage lockFocus];
56 sm_cocoaDCStack.Insert(this);
57 NSAffineTransform *newTransform = CocoaGetWxToBoundsTransform([m_cocoaNSImage isFlipped], [m_cocoaNSImage size].height);
58 [newTransform retain];
59 [m_cocoaWxToBoundsTransform release];
60 m_cocoaWxToBoundsTransform = newTransform;
61 CocoaApplyTransformations();
62 return true;
63 }
64 return false;
65}
66
67bool wxMemoryDC::CocoaUnlockFocus()
68{
69 [m_cocoaNSImage unlockFocus];
70 return true;
71}
72
73// NOTE: The AppKit is unable to draw onto an NSBitmapImageRep so we must
74// instead copy the data to an offscreen window, then copy it back
75void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
76{
77 wxAutoNSAutoreleasePool pool;
78 if(m_selectedBitmap.Ok())
79 {
80 CocoaTakeFocus();
81 wxASSERT(m_cocoaNSImage);
82 m_selectedBitmap.SetNSBitmapImageRep(
83 [[NSBitmapImageRep alloc]
84 initWithFocusedViewRect:NSMakeRect(0.0,0.0,
85 m_selectedBitmap.GetWidth(),
86 m_selectedBitmap.GetHeight())]);
87 }
88 CocoaUnwindStackAndLoseFocus();
89 [m_cocoaNSImage release];
90 m_cocoaNSImage = nil;
91 m_selectedBitmap = bitmap;
92 if(m_selectedBitmap.Ok())
93 {
94 // Create an offscreen window of the same size
95 m_cocoaNSImage = [[NSImage alloc]
96 initWithSize:NSMakeSize(m_selectedBitmap.GetWidth(),
97 m_selectedBitmap.GetHeight())];
98
99 // Now copy the data
100 NSImage *nsimage = [m_selectedBitmap.GetNSImage(false) retain];
101 [m_cocoaNSImage lockFocus];
102 [nsimage drawAtPoint: NSMakePoint(0,0)
103 fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
104 operation: NSCompositeCopy
105 fraction: 1.0];
106 [m_cocoaNSImage unlockFocus];
107
108 [nsimage release];
109 }
110}
111
112void wxMemoryDC::DoGetSize( int *width, int *height ) const
113{
114 if(width)
115 *width = m_selectedBitmap.GetWidth();
116 if(height)
117 *height = m_selectedBitmap.GetHeight();
118}
119
120bool wxMemoryDC::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
121 wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
122 int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
123{
124 if(!m_selectedBitmap.Ok())
125 return false;
126
127 NSAffineTransform *transform = [NSAffineTransform transform];
128 [transform translateXBy:xdest yBy:ydest];
129
130 NSAffineTransform *flipTransform = [NSAffineTransform transform];
131 /* x' = 1x + 0y + 0
132 y' = 0x + -1y + window's height
133 */
134 NSAffineTransformStruct matrix = {
135 1, 0
136 , 0, -1
137 , 0, height
138 };
139 [flipTransform setTransformStruct: matrix];
140
141 NSGraphicsContext *context = [NSGraphicsContext currentContext];
142 [context saveGraphicsState];
143 [transform concat];
144 [flipTransform concat];
145
146 wxLogTrace(wxTRACE_COCOA,wxT("[m_cocoaNSImage isFlipped]=%d"), [m_cocoaNSImage isFlipped]);
147 [m_cocoaNSImage drawAtPoint: NSMakePoint(0,0)
148 fromRect: NSMakeRect(xsrc,
149 m_selectedBitmap.GetHeight()-height-ysrc,
150 width, height)
151 operation: NSCompositeCopy // FIXME: raster ops
152 fraction: 1.0];
153
154 [context restoreGraphicsState];
155 return false;
156}
157
158bool wxMemoryDC::CocoaGetBounds(void *rectData)
159{
160 if(!rectData)
161 return false;
162 if(!m_cocoaNSImage)
163 return false;
164 NSRect *pRect = (NSRect*)rectData;
165 pRect->origin.x = 0.0;
166 pRect->origin.y = 0.0;
167 pRect->size = [m_cocoaNSImage size];
168 return true;
169}
170