/////////////////////////////////////////////////////////////////////////////
// Name: src/cocoa/dcmemory.mm
-// Purpose: wxMemoryDC class
+// Purpose: wxMemoryDCImpl class
// Author: David Elliott
// Modified by:
// Created: 2003/03/16
// RCS-ID: $Id$
// Copyright: (c) 2002 David Elliott
-// Licence: wxWindows licence
+// Licence: wxWidgets licence
/////////////////////////////////////////////////////////////////////////////
-#include "wx/dcmemory.h"
+#include "wx/wxprec.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+#endif //WX_PRECOMP
+
+#include "wx/cocoa/dcmemory.h"
+#include "wx/cocoa/autorelease.h"
#import <AppKit/NSImage.h>
+#import <AppKit/NSAffineTransform.h>
+#import <AppKit/NSGraphicsContext.h>
+#import <AppKit/NSColor.h>
+#import <AppKit/NSBezierPath.h>
//-----------------------------------------------------------------------------
-// wxMemoryDC
+// wxMemoryDCImpl
//-----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxDC)
+IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl,wxCocoaDCImpl)
-wxMemoryDC::wxMemoryDC(void)
+void wxMemoryDCImpl::Init()
{
m_cocoaNSImage = NULL;
m_ok = false;
}
-wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
+wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC *owner, wxDC *WXUNUSED(dc))
+: wxCocoaDCImpl(owner)
{
- m_cocoaNSImage = NULL;
- m_ok = false;
+ Init();
}
-wxMemoryDC::~wxMemoryDC(void)
+wxMemoryDCImpl::~wxMemoryDCImpl(void)
{
CocoaUnwindStackAndLoseFocus();
[m_cocoaNSImage release];
}
-bool wxMemoryDC::CocoaLockFocus()
+bool wxMemoryDCImpl::CocoaLockFocus()
{
if(m_cocoaNSImage)
{
- [m_cocoaNSImage lockFocusOnRepresentation: m_selectedBitmap.GetNSBitmapImageRep()];
+ [m_cocoaNSImage lockFocus];
sm_cocoaDCStack.Insert(this);
+ NSAffineTransform *newTransform = CocoaGetWxToBoundsTransform([m_cocoaNSImage isFlipped], [m_cocoaNSImage size].height);
+ [newTransform retain];
+ [m_cocoaWxToBoundsTransform release];
+ m_cocoaWxToBoundsTransform = newTransform;
+ CocoaApplyTransformations();
return true;
}
return false;
}
-bool wxMemoryDC::CocoaUnlockFocus()
+bool wxMemoryDCImpl::CocoaUnlockFocus()
{
[m_cocoaNSImage unlockFocus];
return true;
}
-void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
+// 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 wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
{
+ wxAutoNSAutoreleasePool pool;
+ if(m_selectedBitmap.Ok())
+ {
+ CocoaTakeFocus();
+ wxASSERT(m_cocoaNSImage);
+ // Replace the bitmap's native data with a newly created one based on the
+ // NSImage that has been (potentially) drawn upon. Note that this may and
+ // probably will in many cases change the bitmap's format.
+ // There is nothing we can do about this using pure Cocoa code. Even using
+ // CGBitmapContext is not an option because it only supports a limited
+ // number of bitmap formats. Specifically, 24-bpp is not supported.
+ 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
+ // Pass false to GetNSImage so the mask is not applied as an alpha channel.
+ // Cocoa uses premultiplied alpha so applying the mask would cause all
+ // color information masked out to be turned black which is undesirable.
+ // FIXME: Currently, the mask will not be updated if any drawing occurs.
+ // My only suggestion is for wxCocoa users to eschew the mask in favor
+ // of an alpha channel or to recreate the mask after drawing.
+ // The only way to fix this is to draw twice, once as normal and again
+ // onto the mask to update it. That would require overriding every
+ // single drawing primitive (e.g. DoDrawLine, DoDrawRectangle, etc.)
+ // and would be a major undertaking.
+ NSImage *nsimage = [m_selectedBitmap.GetNSImage(false) retain];
+ [m_cocoaNSImage lockFocus];
+ [nsimage drawAtPoint: NSMakePoint(0,0)
+ fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
+ operation: NSCompositeCopy
+ fraction: 1.0];
+ [m_cocoaNSImage unlockFocus];
+
+ [nsimage release];
}
}
-void wxMemoryDC::DoGetSize( int *width, int *height ) const
+void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
{
if(width)
*width = m_selectedBitmap.GetWidth();
*height = m_selectedBitmap.GetHeight();
}
+bool wxMemoryDCImpl::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
+ wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
+ int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
+{
+ if(!m_selectedBitmap.Ok())
+ return false;
+
+ NSAffineTransform *transform = [NSAffineTransform transform];
+ [transform translateXBy:xdest yBy:ydest];
+
+ NSAffineTransform *flipTransform = [NSAffineTransform transform];
+ /* x' = 1x + 0y + 0
+ y' = 0x + -1y + window's height
+ */
+ NSAffineTransformStruct matrix = {
+ 1, 0
+ , 0, -1
+ , 0, height
+ };
+ [flipTransform setTransformStruct: matrix];
+
+ NSGraphicsContext *context = [NSGraphicsContext currentContext];
+ [context saveGraphicsState];
+ [transform concat];
+ [flipTransform concat];
+
+ NSImage *sourceImage;
+ if(useMask)
+ {
+ sourceImage = [m_cocoaNSImage copy];
+ // Apply the mask to the copied image
+ NSBitmapImageRep *maskRep = m_selectedBitmap.GetMask()->GetNSBitmapImageRep();
+ NSImage *maskImage = [[NSImage alloc] initWithSize:[maskRep size]];
+ [maskImage addRepresentation:maskRep];
+ [sourceImage lockFocus];
+ [maskImage compositeToPoint:NSZeroPoint operation:NSCompositeDestinationIn];
+ [sourceImage unlockFocus];
+ [maskImage release];
+ }
+ else
+ { // retain the m_cocoaNSImage so it has the same ownership as the copy done in the other case.
+ sourceImage = [m_cocoaNSImage retain];
+ }
+ NSCompositingOperation drawingOp;
+ switch(logicalFunc)
+ {
+ case wxCOPY:
+ // Even if not using the mask, the image might have an alpha channel
+ // so always use NSCompositeSourceOver. If the image is fully opaque
+ // it works out the same as NSCompositeCopy.
+ drawingOp = NSCompositeSourceOver;
+ break;
+ // FIXME: implement more raster ops
+ default:
+ wxLogDebug(wxT("wxCocoa does not support blitting with raster operation %d."), logicalFunc);
+ // Just use the default operation.
+ drawingOp = NSCompositeCopy;
+ }
+
+ wxLogTrace(wxTRACE_COCOA,wxT("[m_cocoaNSImage isFlipped]=%d"), [m_cocoaNSImage isFlipped]);
+ [sourceImage drawAtPoint: NSMakePoint(0,0)
+ fromRect: NSMakeRect(xsrc,
+ m_selectedBitmap.GetHeight()-height-ysrc,
+ width, height)
+ operation: drawingOp
+ fraction: 1.0];
+
+ [sourceImage release]; // It was either retained, copied, or allocated.
+ [context restoreGraphicsState];
+ return false;
+}
+
+bool wxMemoryDCImpl::CocoaGetBounds(void *rectData)
+{
+ if(!rectData)
+ return false;
+ if(!m_cocoaNSImage)
+ return false;
+ NSRect *pRect = (NSRect*)rectData;
+ pRect->origin.x = 0.0;
+ pRect->origin.y = 0.0;
+ pRect->size = [m_cocoaNSImage size];
+ return true;
+}
+
projects / wxWidgets.git / blobdiff