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using NSImage as first-class native representation

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If given an NSImage this will be used, unless raw bitmap data access is needed, lazily converting to a CGBitmapContext at that moment
This commit is contained in:
Stefan Csomor
2018-09-20 21:05:17 +02:00
committed by Vadim Zeitlin
parent 3e6d927eab
commit ee8132fea9
1 changed files with 221 additions and 110 deletions
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331
src/osx/core/bitmap.cpp
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@@ -37,12 +37,9 @@ CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffe
// Implementation Notes
// --------------------
//
// we are always working with a 32 bit deep pixel buffer
// under QuickDraw its alpha parts are going to be ignored in the GWorld,
// therefore we have a separate GWorld there for blitting the mask in
// under Quartz then content is transformed into a CGImageRef representing the same data
// which can be transferred to the GPU by the OS for fast rendering
// A bitmap can be represented using an NSImage or a CGBitmapContextRef
// If raw bitmap data needs to be accessed, then even the NSImage has to be
// rendered into a CGBitmapContextRef
class WXDLLEXPORT wxBitmapRefData: public wxGDIRefData
{
@@ -52,31 +49,23 @@ public:
wxBitmapRefData(int width , int height , int depth, double logicalscale = 1.0);
wxBitmapRefData(CGContextRef context);
wxBitmapRefData(CGImageRef image, double scale);
wxBitmapRefData(WX_NSImage image);
wxBitmapRefData();
wxBitmapRefData(const wxBitmapRefData &tocopy);
virtual ~wxBitmapRefData();
virtual bool IsOk() const wxOVERRIDE { return m_ok; }
bool IsOk() const;
void Free();
#if wxOSX_BITMAP_NATIVE_ACCESS
int GetWidth() const
{ return CGBitmapContextGetWidth(m_hBitmap); }
int GetHeight() const
{ return CGBitmapContextGetHeight(m_hBitmap); }
int GetDepth() const
{ return CGBitmapContextGetBitsPerPixel(m_hBitmap); }
int GetBytesPerRow() const
{ return CGBitmapContextGetBytesPerRow(m_hBitmap); }
bool HasAlpha() const
{
CGImageAlphaInfo alpha = CGBitmapContextGetAlphaInfo(m_hBitmap);
return !(alpha == kCGImageAlphaNone ||
alpha == kCGImageAlphaNoneSkipFirst ||
alpha == kCGImageAlphaNoneSkipLast);
}
int GetWidth() const;
int GetHeight() const;
int GetDepth() const;
int GetBytesPerRow() const;
bool HasAlpha() const;
WX_NSImage GetNSImage() const;
#else
void SetWidth( int width ) { m_width = width; }
void SetHeight( int height ) { m_height = height; }
@@ -130,7 +119,11 @@ private :
bool Create(int width , int height , int depth, double logicalscale);
bool Create( CGImageRef image, double scale );
bool Create( CGContextRef bitmapcontext);
bool Create( WX_NSImage image);
void Init();
void EnsureBitmapExists() const;
void FreeDerivedRepresentations();
#if !wxOSX_BITMAP_NATIVE_ACCESS
@@ -140,9 +133,11 @@ private :
int m_depth;
bool m_hasAlpha;
wxMemoryBuffer m_memBuf;
bool m_ok;
#else
WX_NSImage m_nsImage;
#endif
int m_rawAccessCount;
bool m_ok;
mutable CGImageRef m_cgImageRef;
bool m_isTemplate;
@@ -187,8 +182,9 @@ void wxBitmapRefData::Init()
m_depth = 0 ;
m_bytesPerRow = 0;
m_hasAlpha = false;
#else
m_nsImage = NULL;
#endif
m_ok = false ;
m_bitmapMask = NULL ;
m_cgImageRef = NULL ;
m_isTemplate = false;
@@ -241,6 +237,32 @@ wxBitmapRefData::wxBitmapRefData(CGImageRef image, double scale)
Init();
Create( image, scale );
}
wxBitmapRefData::wxBitmapRefData(WX_NSImage image)
{
Init();
Create( image );
}
void wxBitmapRefData::EnsureBitmapExists() const
{
if ( ! m_hBitmap && m_nsImage)
{
wxBitmapRefData* t = const_cast<wxBitmapRefData*>(this);
t->m_hBitmap = wxOSXCreateBitmapContextFromNSImage(m_nsImage, &t->m_isTemplate);
}
}
bool wxBitmapRefData::Create( WX_NSImage image )
{
m_nsImage = image;
wxMacCocoaRetain(image);
return true;
}
// code from Technical Q&A QA1509
bool wxBitmapRefData::Create(CGImageRef image, double scale)
@@ -289,10 +311,7 @@ bool wxBitmapRefData::Create(CGImageRef image, double scale)
} /* data != NULL */
#endif
}
m_ok = ( m_hBitmap != NULL ) ;
return m_ok ;
return IsOk() ;
}
bool wxBitmapRefData::Create(CGContextRef context)
@@ -336,9 +355,7 @@ bool wxBitmapRefData::Create(CGContextRef context)
#endif
}
}
m_ok = ( m_hBitmap != NULL ) ;
return m_ok ;
return IsOk() ;
}
bool wxBitmapRefData::Create( int w , int h , int d, double logicalscale )
@@ -370,13 +387,94 @@ bool wxBitmapRefData::Create( int w , int h , int d, double logicalscale )
#if !wxOSX_BITMAP_NATIVE_ACCESS
} /* data != NULL */
#endif
m_ok = ( m_hBitmap != NULL ) ;
return m_ok ;
return IsOk() ;
}
bool wxBitmapRefData::IsOk() const
{
return ( m_hBitmap.get() != NULL
#if wxOSX_BITMAP_NATIVE_ACCESS
|| m_nsImage != NULL
#endif
);
}
#if wxOSX_BITMAP_NATIVE_ACCESS
int wxBitmapRefData::GetWidth() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( m_hBitmap )
return CGBitmapContextGetWidth(m_hBitmap);
else
return (int) wxOSXGetImageSize(m_nsImage).width;
}
int wxBitmapRefData::GetHeight() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( m_hBitmap )
return CGBitmapContextGetHeight(m_hBitmap);
else
return (int) wxOSXGetImageSize(m_nsImage).height;
}
int wxBitmapRefData::GetDepth() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( m_hBitmap )
return CGBitmapContextGetBitsPerPixel(m_hBitmap);
else
return 32; // a bitmap converted from an nsimage would have this depth
}
int wxBitmapRefData::GetBytesPerRow() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( m_hBitmap )
return CGBitmapContextGetBytesPerRow(m_hBitmap);
else
return GetBestBytesPerRow( GetWidth() * 4);
}
bool wxBitmapRefData::HasAlpha() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( m_hBitmap )
{
CGImageAlphaInfo alpha = CGBitmapContextGetAlphaInfo(m_hBitmap);
return !(alpha == kCGImageAlphaNone || alpha == kCGImageAlphaNoneSkipFirst || alpha == kCGImageAlphaNoneSkipLast);
}
else
{
return true; // a bitmap converted from an nsimage would have alpha
}
}
WX_NSImage wxBitmapRefData::GetNSImage() const
{
wxCHECK_MSG( IsOk() , 0 , "Invalid Bitmap");
if ( !m_nsImage )
{
wxCFRef< CGImageRef > cgimage(CreateCGImage());
return wxOSXGetNSImageFromCGImage( cgimage, GetScaleFactor(), IsTemplate() );
}
return m_nsImage;
}
#endif
void wxBitmapRefData::UseAlpha( bool use )
{
wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
if ( HasAlpha() == use )
return ;
@@ -400,6 +498,9 @@ void wxBitmapRefData::UseAlpha( bool use )
const void *wxBitmapRefData::GetRawAccess() const
{
wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
EnsureBitmapExists();
#if !wxOSX_BITMAP_NATIVE_ACCESS
return m_memBuf.GetData() ;
#else
@@ -665,13 +766,19 @@ IconRef wxBitmapRefData::GetIconRef()
CGImageRef wxBitmapRefData::CreateCGImage() const
{
wxASSERT( m_ok ) ;
wxASSERT( IsOk() ) ;
wxASSERT( m_rawAccessCount >= 0 ) ;
CGImageRef image ;
if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
{
if ( GetDepth() != 1 && m_bitmapMask == NULL )
if (m_nsImage)
{
image = wxOSXCreateCGImageFromNSImage(m_nsImage);
}
else
{
if (GetDepth() != 1 && m_bitmapMask == NULL)
{
#if 0
// in order for this code to work properly, wxMask would have to invert black and white
// in the native bitmap
@@ -685,85 +792,84 @@ CGImageRef wxBitmapRefData::CreateCGImage() const
}
else
#endif
image = CGBitmapContextCreateImage( m_hBitmap );
}
else
{
size_t imageSize = GetHeight() * GetBytesPerRow() ;
int w = GetWidth() ;
int h = GetHeight() ;
CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
wxMemoryBuffer membuf;
if ( m_bitmapMask )
{
alphaInfo = kCGImageAlphaFirst ;
unsigned char *destalphastart = (unsigned char*) membuf.GetWriteBuf( imageSize ) ;
memcpy( destalphastart , GetRawAccess() , imageSize ) ;
unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
for ( int y = 0 ; y < h ; ++y , destalphastart += GetBytesPerRow(), sourcemaskstart += maskrowbytes)
{
unsigned char *sourcemask = sourcemaskstart ;
unsigned char *destalpha = destalphastart ;
for ( int x = 0 ; x < w ; ++x , sourcemask += kMaskBytesPerPixel , destalpha += 4 )
{
*destalpha = 0xFF - *sourcemask ;
}
}
membuf.UngetWriteBuf( imageSize );
image = CGBitmapContextCreateImage(m_hBitmap);
}
else
{
if ( HasAlpha() )
size_t imageSize = GetHeight() * GetBytesPerRow();
int w = GetWidth();
int h = GetHeight();
CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst;
wxMemoryBuffer membuf;
if (m_bitmapMask)
{
alphaInfo = kCGImageAlphaFirst;
unsigned char* destalphastart = (unsigned char*)membuf.GetWriteBuf(imageSize);
memcpy(destalphastart, GetRawAccess(), imageSize);
unsigned char* sourcemaskstart = (unsigned char*)m_bitmapMask->GetRawAccess();
int maskrowbytes = m_bitmapMask->GetBytesPerRow();
for (int y = 0; y < h; ++y, destalphastart += GetBytesPerRow(), sourcemaskstart += maskrowbytes)
{
unsigned char* sourcemask = sourcemaskstart;
unsigned char* destalpha = destalphastart;
for (int x = 0; x < w; ++x, sourcemask += kMaskBytesPerPixel, destalpha += 4)
{
*destalpha = 0xFF - *sourcemask;
}
}
membuf.UngetWriteBuf(imageSize);
}
else
{
if (HasAlpha())
{
#if wxOSX_USE_PREMULTIPLIED_ALPHA
alphaInfo = kCGImageAlphaPremultipliedFirst ;
alphaInfo = kCGImageAlphaPremultipliedFirst;
#else
alphaInfo = kCGImageAlphaFirst ;
alphaInfo = kCGImageAlphaFirst;
#endif
}
#if wxOSX_BITMAP_NATIVE_ACCESS
memcpy(membuf.GetWriteBuf( imageSize ),GetRawAccess(),imageSize);
membuf.UngetWriteBuf(imageSize);
#endif
}
CGDataProviderRef dataProvider = NULL ;
if ( GetDepth() == 1 )
{
// TODO CHECK ALIGNMENT
wxMemoryBuffer maskBuf;
unsigned char * maskBufData = (unsigned char*) maskBuf.GetWriteBuf( GetWidth() * GetHeight() );
unsigned char * bufData = (unsigned char *) membuf.GetData() ;
// copy one color component
size_t i = 0;
for( int y = 0 ; y < GetHeight() ; bufData+= GetBytesPerRow(), ++y )
{
unsigned char *bufDataIter = bufData+3;
for ( int x = 0 ; x < GetWidth() ; bufDataIter += 4, ++x, ++i )
{
maskBufData[i] = *bufDataIter;
}
#if wxOSX_BITMAP_NATIVE_ACCESS
memcpy(membuf.GetWriteBuf(imageSize), GetRawAccess(), imageSize);
membuf.UngetWriteBuf(imageSize);
#endif
}
maskBuf.UngetWriteBuf( GetWidth() * GetHeight() );
dataProvider =
wxMacCGDataProviderCreateWithMemoryBuffer( maskBuf );
CGDataProviderRef dataProvider = NULL;
if (GetDepth() == 1)
{
// TODO CHECK ALIGNMENT
wxMemoryBuffer maskBuf;
unsigned char* maskBufData = (unsigned char*)maskBuf.GetWriteBuf(GetWidth() * GetHeight());
unsigned char* bufData = (unsigned char*)membuf.GetData();
// copy one color component
size_t i = 0;
for (int y = 0; y < GetHeight(); bufData += GetBytesPerRow(), ++y)
{
unsigned char* bufDataIter = bufData + 3;
for (int x = 0; x < GetWidth(); bufDataIter += 4, ++x, ++i)
{
maskBufData[i] = *bufDataIter;
}
}
maskBuf.UngetWriteBuf(GetWidth() * GetHeight());
image = ::CGImageMaskCreate( w, h, 8, 8, GetWidth() , dataProvider, NULL, false );
dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer(maskBuf);
image = ::CGImageMaskCreate(w, h, 8, 8, GetWidth(), dataProvider, NULL, false);
}
else
{
CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer(membuf);
image = ::CGImageCreate(
w, h, 8, 32, GetBytesPerRow(), colorSpace, alphaInfo,
dataProvider, NULL, false, kCGRenderingIntentDefault);
}
CGDataProviderRelease(dataProvider);
}
else
{
CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer( membuf );
image =
::CGImageCreate(
w, h, 8 , 32 , GetBytesPerRow() , colorSpace, alphaInfo ,
dataProvider, NULL , false , kCGRenderingIntentDefault );
}
CGDataProviderRelease( dataProvider);
}
}
else
@@ -832,6 +938,8 @@ void wxBitmapRefData::Free()
FreeDerivedRepresentations();
wxMacCocoaRelease(m_nsImage);
m_hBitmap.reset();
wxDELETE(m_bitmapMask);
}
@@ -849,6 +957,9 @@ wxBitmapRefData::~wxBitmapRefData()
bool wxBitmap::CopyFromIcon(const wxIcon& icon)
{
#if wxOSX_BITMAP_NATIVE_ACCESS
return Create( icon.GetNSImage() );
#else
int w = icon.GetWidth() ;
int h = icon.GetHeight() ;
@@ -866,6 +977,7 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon)
}
return false;
#endif
}
wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
@@ -1006,11 +1118,11 @@ wxBitmap::wxBitmap(WX_NSImage image)
bool wxBitmap::Create(WX_NSImage image)
{
bool isTemplate;
if (!Create(wxOSXCreateBitmapContextFromNSImage(image, &isTemplate)))
return false;
GetBitmapData()->SetTemplate(isTemplate);
return true;
UnRef();
m_refData = new wxBitmapRefData( image );
return GetBitmapData()->IsOk() ;
}
wxBitmap::wxBitmap(CGContextRef bitmapcontext)
@@ -1029,8 +1141,7 @@ bool wxBitmap::Create(CGContextRef bitmapcontext)
WX_NSImage wxBitmap::GetNSImage() const
{
wxCFRef< CGImageRef > cgimage(CreateCGImage());
return wxOSXGetNSImageFromCGImage( cgimage, GetScaleFactor(), GetBitmapData()->IsTemplate() );
return GetBitmapData()->GetNSImage();
}
#endif