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* Since AppKit cannot draw directly on NSBitmapImageRep, copy the data

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to/from an offscreen window during SelectObject
* Apply the usual flip transformations


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22705 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
David Elliott 2003-08-08 14:57:04 +00:00
parent ab13160e71
commit e3d7f7703e
1 changed files with 29 additions and 2 deletions
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31
src/cocoa/dcmemory.mm
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@ -44,8 +44,11 @@ bool wxMemoryDC::CocoaLockFocus()
{
if(m_cocoaNSImage)
{
[m_cocoaNSImage lockFocusOnRepresentation: m_selectedBitmap.GetNSBitmapImageRep()];
[m_cocoaNSImage lockFocus];
sm_cocoaDCStack.Insert(this);
m_cocoaFlipped = [m_cocoaNSImage isFlipped];
m_cocoaHeight = [m_cocoaNSImage size].height;
CocoaApplyTransformations();
return true;
}
return false;
@ -57,18 +60,42 @@ bool wxMemoryDC::CocoaUnlockFocus()
return true;
}
// NOTE: The AppKit is unable to draw onto an NSBitmapImageRep so we must
// instead copy the data to an offscreen window, then copy it back
void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
{
if(m_selectedBitmap.Ok())
{
CocoaTakeFocus();
wxASSERT(m_cocoaNSImage);
m_selectedBitmap.SetNSBitmapImageRep(
[[NSBitmapImageRep alloc]
initWithFocusedViewRect:NSMakeRect(0.0,0.0,
m_selectedBitmap.GetWidth(),
m_selectedBitmap.GetHeight())]);
}
CocoaUnwindStackAndLoseFocus();
[m_cocoaNSImage release];
m_cocoaNSImage = nil;
m_selectedBitmap = bitmap;
if(m_selectedBitmap.Ok())
{
// Create an offscreen window of the same size
m_cocoaNSImage = [[NSImage alloc]
initWithSize:NSMakeSize(m_selectedBitmap.GetWidth(),
m_selectedBitmap.GetHeight())];
[m_cocoaNSImage addRepresentation: m_selectedBitmap.GetNSBitmapImageRep()];
// Now copy the data
NSImage *nsimage = [[NSImage alloc]
initWithSize:NSMakeSize(m_selectedBitmap.GetWidth(),
m_selectedBitmap.GetHeight())];
[nsimage addRepresentation: const_cast<wxBitmap&>(m_selectedBitmap).GetNSBitmapImageRep()];
[nsimage drawAtPoint: NSMakePoint(0,0)
fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
operation: NSCompositeCopy
fraction: 1.0];
[nsimage release];
}
}