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Added wxImage wxImage::GetSubImage(cont wxRect&) const

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3414 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Sylvain Bougnoux
1999-08-18 17:01:47 +00:00
parent 895fc9cb8b
commit 7b2471a060
3 changed files with 77 additions and 6 deletions
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49
src/common/image.cpp
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@@ -189,6 +189,43 @@ wxImage wxImage::Scale( int width, int height ) const
return image;
}
wxImage wxImage::GetSubImage( const wxRect &rect ) const
{
wxImage image;
wxCHECK_MSG( Ok(), image, _T("invalid image") );
wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight())
, image, _T("invalid subimage size") );
int subwidth=rect.GetWidth();
const int subheight=rect.GetHeight();
image.Create( subwidth, subheight );
char unsigned *subdata = image.GetData(), *data=GetData();
wxCHECK_MSG( subdata, image, _T("unable to create image") );
if (M_IMGDATA->m_hasMask)
image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
const int subleft=3*rect.GetLeft();
const int width=3*GetWidth();
subwidth*=3;
data+=rect.GetTop()*width+subleft;
for (long j = 0; j < subheight; ++j)
{
memcpy( subdata, data, subwidth);
subdata+=subwidth;
data+=width;
}
return image;
}
void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
{
wxCHECK_RET( Ok(), _T("invalid image") );
@@ -388,7 +425,6 @@ bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
}
#if wxUSE_STREAMS
//#include <stream.h>
bool wxImage::LoadFile( wxInputStream& stream, long type )
{
@@ -403,8 +439,8 @@ bool wxImage::LoadFile( wxInputStream& stream, long type )
// here we can try to guess the handler according the extension,
// but we lose the stream name !?
// Probably we should write methods such as
// bool wxImageHandler::IsAppropriate(wxString&)
// bool wxImageHandler::IsAppropriate(sxInputStream&&)
// bool wxImageHandler::CanRead(wxString&)
// bool wxImageHandler::CanRead(sxInputStream&&)
// for png : see example.c
wxList &list=GetHandlers();
off_t pos=stream.TellI();
@@ -412,13 +448,14 @@ bool wxImage::LoadFile( wxInputStream& stream, long type )
wxLogNull prevent_log;
for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
{
handler=(wxImageHandler*)node->GetData();
//cout << handler->GetExtension() << endl;
{
handler=(wxImageHandler*)node->GetData();
if (handler->LoadFile( this, stream, FALSE )) return TRUE;
stream.SeekI(pos);
}
wxLogWarning( _T("No handler found for this image.") );
return FALSE;
}