From: Stefan Csomor Date: Thu, 27 Jun 2013 07:24:15 +0000 (+0000) Subject: native bitmap scaling codes X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/c944835aaad14d090837aae9a14d78c08f7df512?hp=ec2df34e27ba41f202ecbf096cdfed082a9ddb8f native bitmap scaling codes git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74300 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- diff --git a/include/wx/osx/bitmap.h b/include/wx/osx/bitmap.h index d9ec58f7bf..d6d973aeda 100644 --- a/include/wx/osx/bitmap.h +++ b/include/wx/osx/bitmap.h @@ -104,8 +104,9 @@ public: wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth = 1); // creates an bitmap from the native image format - wxBitmap(CGImageRef image); + wxBitmap(CGImageRef image, double scale = 1.0); wxBitmap(WX_NSImage image); + wxBitmap(CGContextRef bitmapcontext); // Create a bitmap compatible with the given DC wxBitmap(int width, int height, const wxDC& dc); @@ -132,8 +133,9 @@ public: { return Create(sz.GetWidth(), sz.GetHeight(), depth); } virtual bool Create(const void* data, wxBitmapType type, int width, int height, int depth = 1); - bool Create( CGImageRef image ); + bool Create( CGImageRef image, double scale = 1.0 ); bool Create( WX_NSImage image ); + bool Create( CGContextRef bitmapcontext); // Create a bitmap compatible with the given DC, inheriting its magnification factor bool Create(int width, int height, const wxDC& dc); diff --git a/include/wx/osx/cocoa/private.h b/include/wx/osx/cocoa/private.h index 118bad21ac..e55ea62c1b 100644 --- a/include/wx/osx/cocoa/private.h +++ b/include/wx/osx/cocoa/private.h @@ -39,8 +39,10 @@ OSStatus WXDLLIMPEXP_CORE wxMacDrawCGImage( CGContextRef inContext, const CGRect * inBounds, CGImageRef inImage) ; -WX_NSImage WXDLLIMPEXP_CORE wxOSXGetNSImageFromCGImage( CGImageRef image ); -CGImageRef WXDLLIMPEXP_CORE wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage ); +WX_NSImage WXDLLIMPEXP_CORE wxOSXGetNSImageFromCGImage( CGImageRef image, double scale = 1.0 ); +CGImageRef WXDLLIMPEXP_CORE wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage, double *scale = NULL ); +CGContextRef WXDLLIMPEXP_CORE wxOSXCreateBitmapContextFromNSImage( WX_NSImage nsimage); + wxBitmap WXDLLIMPEXP_CORE wxOSXCreateSystemBitmap(const wxString& id, const wxString &client, const wxSize& size); WXWindow WXDLLIMPEXP_CORE wxOSXGetMainWindow(); diff --git a/src/osx/carbon/utilscocoa.mm b/src/osx/carbon/utilscocoa.mm index a4c9ba8016..1de870f81e 100644 --- a/src/osx/carbon/utilscocoa.mm +++ b/src/osx/carbon/utilscocoa.mm @@ -388,18 +388,17 @@ wxBitmap wxOSXCreateSystemBitmap(const wxString& name, const wxString &client, c wxBitmap wxOSXCreateSystemBitmap(const wxString& name, const wxString &WXUNUSED(client), const wxSize& WXUNUSED(size)) { wxCFStringRef cfname(name); - wxCFRef image( wxOSXCreateCGImageFromNSImage([NSImage imageNamed:cfname.AsNSString()]) ); - return wxBitmap( image ); + return wxBitmap( [NSImage imageNamed:cfname.AsNSString()] ); } // From "Cocoa Drawing Guide:Working with Images" -WX_NSImage wxOSXGetNSImageFromCGImage( CGImageRef image ) +WX_NSImage wxOSXGetNSImageFromCGImage( CGImageRef image, double scaleFactor ) { NSRect imageRect = NSMakeRect(0.0, 0.0, 0.0, 0.0); // Get the image dimensions. - imageRect.size.height = CGImageGetHeight(image); - imageRect.size.width = CGImageGetWidth(image); + imageRect.size.height = CGImageGetHeight(image)/scaleFactor; + imageRect.size.width = CGImageGetWidth(image)/scaleFactor; // Create a new image to receive the Quartz image data. NSImage *newImage = [[NSImage alloc] initWithSize:imageRect.size]; @@ -422,22 +421,47 @@ WX_NSImage wxOSXGetNSImageFromCGImage( CGImageRef image ) return( newImage ); } -CGImageRef wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage ) +CGContextRef WXDLLIMPEXP_CORE wxOSXCreateBitmapContextFromNSImage( WX_NSImage nsimage) { // based on http://www.mail-archive.com/cocoa-dev@lists.apple.com/msg18065.html - - CGImageRef image = NULL; + + CGContextRef hbitmap = NULL; if (nsimage != nil) { + CGFloat scale = [[NSScreen mainScreen] backingScaleFactor]; + NSSize imageSize = [nsimage size]; - CGContextRef context = CGBitmapContextCreate(NULL, imageSize.width, imageSize.height, 8, 0, wxMacGetGenericRGBColorSpace(), kCGImageAlphaPremultipliedFirst); - NSGraphicsContext *nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO]; + + hbitmap = CGBitmapContextCreate(NULL, imageSize.width*scale, imageSize.height*scale, 8, 0, wxMacGetGenericRGBColorSpace(), kCGImageAlphaPremultipliedFirst); + CGContextScaleCTM( hbitmap, scale, scale ); + + NSGraphicsContext *nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:hbitmap flipped:NO]; [NSGraphicsContext saveGraphicsState]; [NSGraphicsContext setCurrentContext:nsGraphicsContext]; [[NSColor whiteColor] setFill]; NSRectFill(NSMakeRect(0.0, 0.0, imageSize.width, imageSize.height)); [nsimage drawAtPoint:NSZeroPoint fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0]; [NSGraphicsContext setCurrentContext:nsGraphicsContext]; + } + return hbitmap; +} + +CGImageRef wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage, double *scaleptr ) +{ + // based on http://www.mail-archive.com/cocoa-dev@lists.apple.com/msg18065.html + + CGImageRef image = NULL; + if (nsimage != nil) + { + CGContextRef context = wxOSXCreateBitmapContextFromNSImage(nsimage); + if ( scaleptr ) + { + // determine content scale + CGRect userrect = CGRectMake(0, 0, 10, 10); + CGRect devicerect; + devicerect = CGContextConvertRectToDeviceSpace(context, userrect); + *scaleptr = devicerect.size.height / userrect.size.height; + } image = CGBitmapContextCreateImage(context); CFRelease(context); } diff --git a/src/osx/core/bitmap.cpp b/src/osx/core/bitmap.cpp index f1f1821a38..bf31f8a00c 100644 --- a/src/osx/core/bitmap.cpp +++ b/src/osx/core/bitmap.cpp @@ -58,7 +58,8 @@ class WXDLLEXPORT wxBitmapRefData: public wxGDIRefData public: wxBitmapRefData(int width , int height , int depth, double logicalscale); wxBitmapRefData(int width , int height , int depth); - wxBitmapRefData(CGImageRef image); + wxBitmapRefData(CGContextRef context); + wxBitmapRefData(CGImageRef image, double scale); wxBitmapRefData(); wxBitmapRefData(const wxBitmapRefData &tocopy); @@ -111,7 +112,8 @@ public: private : bool Create(int width , int height , int depth); bool Create(int width , int height , int depth, double logicalScale); - bool Create( CGImageRef image ); + bool Create( CGImageRef image, double scale ); + bool Create( CGContextRef bitmapcontext); void Init(); int m_width; @@ -281,14 +283,20 @@ wxBitmapRefData::wxBitmapRefData(int w , int h , int d, double logicalscale) Create( w , h , d, logicalscale ) ; } -wxBitmapRefData::wxBitmapRefData(CGImageRef image) +wxBitmapRefData::wxBitmapRefData(CGContextRef context) { Init(); - Create( image ); + Create( context ); +} + +wxBitmapRefData::wxBitmapRefData(CGImageRef image, double scale) +{ + Init(); + Create( image, scale ); } // code from Technical Q&A QA1509 -bool wxBitmapRefData::Create(CGImageRef image) +bool wxBitmapRefData::Create(CGImageRef image, double scale) { if ( image != NULL ) { @@ -296,6 +304,7 @@ bool wxBitmapRefData::Create(CGImageRef image) m_height = CGImageGetHeight(image); m_depth = 32; m_hBitmap = NULL; + m_scaleFactor = scale; m_bytesPerRow = GetBestBytesPerRow( m_width * 4 ) ; size_t size = m_bytesPerRow * m_height ; @@ -319,7 +328,7 @@ bool wxBitmapRefData::Create(CGImageRef image) wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ; CGContextTranslateCTM( m_hBitmap, 0, m_height ); - CGContextScaleCTM( m_hBitmap, 1, -1 ); + CGContextScaleCTM( m_hBitmap, 1*m_scaleFactor, -1*m_scaleFactor ); } /* data != NULL */ } m_ok = ( m_hBitmap != NULL ) ; @@ -328,6 +337,41 @@ bool wxBitmapRefData::Create(CGImageRef image) } +bool wxBitmapRefData::Create(CGContextRef context) +{ + if ( context != NULL && CGBitmapContextGetData(context) ) + { + m_hBitmap = context; + m_bytesPerRow = CGBitmapContextGetBytesPerRow(context); + m_width = CGBitmapContextGetWidth(context); + m_height = CGBitmapContextGetHeight(context); + m_depth = CGBitmapContextGetBitsPerPixel(context) ; + + // our own contexts conform to this, always. + wxASSERT( m_depth == 32 ); + + // determine content scale + CGRect userrect = CGRectMake(0, 0, 10, 10); + CGRect devicerect; + devicerect = CGContextConvertRectToDeviceSpace(context, userrect); + m_scaleFactor = devicerect.size.height / userrect.size.height; + + CGImageAlphaInfo alpha = CGBitmapContextGetAlphaInfo(context); + + if ( alpha == kCGImageAlphaNone || alpha == kCGImageAlphaNoneSkipFirst || alpha == kCGImageAlphaNoneSkipLast ) + { + // no alpha + } + else + { + m_hasAlpha = true; + } + } + m_ok = ( m_hBitmap != NULL ) ; + + return m_ok ; +} + bool wxBitmapRefData::Create( int w , int h , int d ) { m_width = wxMax(1, w); @@ -965,9 +1009,9 @@ wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type) LoadFile(filename, type); } -wxBitmap::wxBitmap(CGImageRef image) +wxBitmap::wxBitmap(CGImageRef image, double scale) { - (void) Create(image); + (void) Create(image,scale); } wxGDIRefData* wxBitmap::CreateGDIRefData() const @@ -1033,14 +1077,27 @@ wxBitmap::wxBitmap(WX_NSImage image) bool wxBitmap::Create(WX_NSImage image) { - wxCFRef cgimage(wxOSXCreateCGImageFromNSImage(image)); - return Create(cgimage); + return Create(wxOSXCreateBitmapContextFromNSImage(image)); +} + +wxBitmap::wxBitmap(CGContextRef bitmapcontext) +{ + (void)Create(bitmapcontext); +} + +bool wxBitmap::Create(CGContextRef bitmapcontext) +{ + UnRef(); + + m_refData = new wxBitmapRefData( bitmapcontext ); + + return M_BITMAPDATA->IsOk() ; } WX_NSImage wxBitmap::GetNSImage() const { wxCFRef< CGImageRef > cgimage(CreateCGImage()); - return wxOSXGetNSImageFromCGImage( cgimage ); + return wxOSXGetNSImageFromCGImage( cgimage, GetScaleFactor() ); } #endif @@ -1154,11 +1211,11 @@ bool wxBitmap::CreateScaled(int w, int h, int d, double logicalScale) return M_BITMAPDATA->IsOk() ; } -bool wxBitmap::Create(CGImageRef image) +bool wxBitmap::Create(CGImageRef image, double scale) { UnRef(); - m_refData = new wxBitmapRefData( image ); + m_refData = new wxBitmapRefData( image, scale ); return M_BITMAPDATA->IsOk() ; }