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implemented alpha support for raw bitmaps under Mac

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21145 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-06-14 12:57:44 +00:00
parent 059d039e1e
commit 1e74d03b7f
4 changed files with 103 additions and 15 deletions
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53
src/mac/carbon/bitmap.cpp
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@@ -366,6 +366,7 @@ wxBitmapRefData::wxBitmapRefData()
m_hPict = NULL ;
m_hIcon = NULL ;
m_bitmapType = kMacBitmapTypeUnknownType ;
m_hasAlpha = false;
}
// TODO move this to a public function of Bitmap Ref
@@ -1051,8 +1052,7 @@ void wxBitmap::SetMask(wxMask *mask)
m_refData = new wxBitmapRefData;
// Remove existing mask if there is one.
if (M_BITMAPDATA->m_bitmapMask)
delete M_BITMAPDATA->m_bitmapMask;
delete M_BITMAPDATA->m_bitmapMask;
M_BITMAPDATA->m_bitmapMask = mask ;
}
@@ -1150,7 +1150,7 @@ bool wxMask::Create(const wxBitmap& bitmap)
wxCHECK_MSG( bitmap.Ok(), false, wxT("Invalid bitmap"));
m_depth = bitmap.GetDepth() ;
m_depth = bitmap.GetDepth() ;
m_maskBitmap = wxMacCreateGWorld(bitmap.GetWidth(), bitmap.GetHeight(), bitmap.GetDepth() );
Rect rect = { 0,0, bitmap.GetHeight(), bitmap.GetWidth() };
@@ -1366,14 +1366,55 @@ void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
data.m_height = GetHeight();
data.m_stride = (*hPixMap)->rowBytes & 0x7fff;
M_BITMAPDATA->m_hasAlpha = false;
return GetPixBaseAddr(hPixMap);
}
void wxBitmap::UngetRawData(wxPixelDataBase& data)
void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
{
if ( !Ok() )
return;
if ( M_BITMAPDATA->m_hasAlpha )
{
wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
int w = data.GetWidth(),
h = data.GetHeight();
wxBitmap bmpMask(GetWidth(), GetHeight(), 32);
wxAlphaPixelData dataMask(bmpMask, data.GetOrigin(), wxSize(w, h));
wxAlphaPixelData::Iterator pMask(dataMask),
p(data);
for ( int y = 0; y < h; y++ )
{
wxAlphaPixelData::Iterator rowStartMask = pMask,
rowStart = p;
for ( int x = 0; x < w; x++ )
{
const wxAlphaPixelData::Iterator::ChannelType
alpha = p.Alpha();
pMask.Red() = alpha;
pMask.Green() = alpha;
pMask.Blue() = alpha;
++p;
++pMask;
}
p = rowStart;
p.OffsetY(data, 1);
pMask = rowStartMask;
pMask.OffsetY(dataMask, 1);
}
SetMask(new wxMask(bmpMask));
}
GWorldPtr gworld = MAC_WXHBITMAP(M_BITMAPDATA->m_hBitmap);
PixMapHandle hPixMap = GetGWorldPixMap(gworld);
if ( hPixMap )
@@ -1384,6 +1425,8 @@ void wxBitmap::UngetRawData(wxPixelDataBase& data)
void wxBitmap::UseAlpha()
{
// nothing to do here so far
// remember that we are using alpha channel, we'll need to create a proper
// mask in UngetRawData()
M_BITMAPDATA->m_hasAlpha = true;
}