+
+// ----------------------------------------------------------------------------
+// raw bitmap access support
+// ----------------------------------------------------------------------------
+
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
+{
+ if ( !Ok() )
+ {
+ // no bitmap, no data (raw or otherwise)
+ return NULL;
+ }
+
+ if ( M_BITMAPDATA->m_bitmapType != kMacBitmapTypeGrafWorld )
+ {
+ wxFAIL_MSG( _T("GetRawData() only supported for GWorlds") );
+
+ return NULL;
+ }
+
+ GWorldPtr gworld = MAC_WXHBITMAP(M_BITMAPDATA->m_hBitmap);
+ PixMapHandle hPixMap = GetGWorldPixMap(gworld);
+ wxCHECK_MSG( hPixMap && *hPixMap, NULL,
+ _T("GetRawData(): failed to get PixMap from GWorld?") );
+
+ wxCHECK_MSG( (*hPixMap)->pixelSize == bpp, NULL,
+ _T("GetRawData(): pixel format mismatch") );
+
+ if ( !LockPixels(hPixMap) )
+ {
+ wxFAIL_MSG( _T("failed to lock PixMap in GetRawData()") );
+
+ return NULL;
+ }
+
+ data.m_width = GetWidth();
+ data.m_height = GetHeight();
+ data.m_stride = (*hPixMap)->rowBytes & 0x7fff;
+
+ M_BITMAPDATA->m_hasAlpha = false;
+
+ return GetPixBaseAddr(hPixMap);
+}
+
+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 )
+ {
+ UnlockPixels(hPixMap);
+ }
+}
+
+void wxBitmap::UseAlpha()
+{
+ // remember that we are using alpha channel, we'll need to create a proper
+ // mask in UngetRawData()
+ M_BITMAPDATA->m_hasAlpha = true;
+}
+
projects / wxWidgets.git / blobdiff