+bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream,
+ bool WXUNUSED(verbose), int index)
+{
+ bool bResult = FALSE;
+ bool IsBmp = FALSE;
+
+ ICONDIR IconDir;
+
+ off_t iPos = stream.TellI();
+ stream.Read(&IconDir, sizeof(IconDir));
+ wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount);
+ // nType is 1 for Icons, 2 for Cursors:
+ wxUint16 nType = wxUINT16_SWAP_ON_BE(IconDir.idType);
+
+ // loop round the icons and choose the best one:
+ ICONDIRENTRY *pIconDirEntry = new ICONDIRENTRY[nIcons];
+ ICONDIRENTRY *pCurrentEntry = pIconDirEntry;
+ int wMax = 0;
+ int colmax = 0;
+ int iSel = wxNOT_FOUND;
+
+ for (int i = 0; i < nIcons; i++ )
+ {
+ stream.Read(pCurrentEntry, sizeof(ICONDIRENTRY));
+ // bHeight and bColorCount are wxUint8
+ if ( pCurrentEntry->bWidth >= wMax )
+ {
+ // see if we have more colors, ==0 indicates > 8bpp:
+ if ( pCurrentEntry->bColorCount == 0 )
+ pCurrentEntry->bColorCount = 255;
+ if ( pCurrentEntry->bColorCount >= colmax )
+ {
+ iSel = i;
+ wMax = pCurrentEntry->bWidth;
+ colmax = pCurrentEntry->bColorCount;
+ }
+ }
+ pCurrentEntry++;
+ }
+
+ if ( index != -1 )
+ {
+ // VS: Note that we *have* to run the loop above even if index != -1, because
+ // it reads ICONDIRENTRies.
+ iSel = index;
+ }
+
+ if ( iSel == wxNOT_FOUND || iSel < 0 || iSel >= nIcons )
+ {
+ wxLogError(_("ICO: Invalid icon index."));
+ bResult = FALSE;
+ }
+ else
+ {
+ // seek to selected icon:
+ pCurrentEntry = pIconDirEntry + iSel;
+ stream.SeekI(iPos + wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart);
+ bResult = LoadDib(image, stream, TRUE, IsBmp);
+ bool bIsCursorType = (this->GetType() == wxBITMAP_TYPE_CUR) || (this->GetType() == wxBITMAP_TYPE_ANI);
+ if ( bResult && bIsCursorType && nType == 2 )
+ {
+ // it is a cursor, so let's set the hotspot:
+ image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes));
+ image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount));
+ }
+ }
+ delete[] pIconDirEntry;
+ return bResult;
+}
+
+int wxICOHandler::GetImageCount(wxInputStream& stream)
+{
+ ICONDIR IconDir;
+ off_t iPos = stream.TellI();
+ stream.SeekI(0);
+ stream.Read(&IconDir, sizeof(IconDir));
+ wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount);
+ stream.SeekI(iPos);
+ return (int)nIcons;
+}
+
+bool wxICOHandler::DoCanRead(wxInputStream& stream)
+{
+ stream.SeekI(0);
+ unsigned char hdr[4];
+ if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
+ return FALSE;
+
+ // hdr[2] is one for an icon and two for a cursor
+ return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\1' && hdr[3] == '\0';
+}
+
+
+
+//-----------------------------------------------------------------------------
+// wxCURHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler)
+
+bool wxCURHandler::DoCanRead(wxInputStream& stream)
+{
+ stream.SeekI(0);
+ unsigned char hdr[4];
+ if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
+ return FALSE;
+
+ // hdr[2] is one for an icon and two for a cursor
+ return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\2' && hdr[3] == '\0';
+}
+
+//-----------------------------------------------------------------------------
+// wxANIHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler)
+
+bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream,
+ bool verbose, int index)
+{
+ wxInt32 FCC1, FCC2;
+ wxUint32 datalen;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *icotxt = "icon";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *ico32 = (wxInt32 *) icotxt;
+
+ int iIcon = 0;
+
+ stream.SeekI(0);
+ stream.Read(&FCC1, 4);
+ if ( FCC1 != *riff32 )
+ return FALSE;
+
+ // we have a riff file:
+ while (stream.IsOk())
+ {
+ // we always have a data size
+ stream.Read(&datalen, 4);
+ datalen = wxINT32_SWAP_ON_BE(datalen) ;
+ //data should be padded to make even number of bytes
+ if (datalen % 2 == 1) datalen ++ ;
+ //now either data or a FCC
+ if ( (FCC1 == *riff32) || (FCC1 == *list32) )
+ {
+ stream.Read(&FCC2, 4);
+ }
+ else
+ {
+ if (FCC1 == *ico32 && iIcon >= index)
+ {
+ return DoLoadFile(image, stream, verbose, -1);
+ }
+ else
+ {
+ stream.SeekI(stream.TellI() + datalen);
+ if ( FCC1 == *ico32 )
+ iIcon ++;
+ }
+ }
+
+ // try to read next data chunk:
+ stream.Read(&FCC1, 4);
+ }
+ return FALSE;
+}
+
+bool wxANIHandler::DoCanRead(wxInputStream& stream)
+{
+ wxInt32 FCC1, FCC2;
+ wxUint32 datalen ;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *anihtxt = "anih";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *anih32 = (wxInt32 *) anihtxt;
+
+ stream.SeekI(0);
+ if ( !stream.Read(&FCC1, 4) )
+ return FALSE;
+
+ if ( FCC1 != *riff32 )
+ return FALSE;
+
+ // we have a riff file:
+ while ( stream.IsOk() )
+ {
+ if ( FCC1 == *anih32 )
+ return TRUE;
+ // we always have a data size:
+ stream.Read(&datalen, 4);
+ datalen = wxINT32_SWAP_ON_BE(datalen) ;
+ //data should be padded to make even number of bytes
+ if (datalen % 2 == 1) datalen ++ ;
+ // now either data or a FCC:
+ if ( (FCC1 == *riff32) || (FCC1 == *list32) )
+ {
+ stream.Read(&FCC2, 4);
+ }
+ else
+ {
+ stream.SeekI(stream.TellI() + datalen);
+ }
+
+ // try to read next data chunk:
+ if ( !stream.Read(&FCC1, 4) )
+ {
+ // reading failed -- either EOF or IO error, bail out anyhow
+ return FALSE;
+ }
+ }
+
+ return FALSE;
+}
+
+int wxANIHandler::GetImageCount(wxInputStream& stream)
+{
+ wxInt32 FCC1, FCC2;
+ wxUint32 datalen ;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *anihtxt = "anih";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *anih32 = (wxInt32 *) anihtxt;
+
+ stream.SeekI(0);
+ stream.Read(&FCC1, 4);
+ if ( FCC1 != *riff32 )
+ return wxNOT_FOUND;
+
+ // we have a riff file:
+ while ( stream.IsOk() )
+ {
+ // we always have a data size:
+ stream.Read(&datalen, 4);
+ datalen = wxINT32_SWAP_ON_BE(datalen) ;
+ //data should be padded to make even number of bytes
+ if (datalen % 2 == 1) datalen ++ ;
+ // now either data or a FCC:
+ if ( (FCC1 == *riff32) || (FCC1 == *list32) )
+ {
+ stream.Read(&FCC2, 4);
+ }
+ else
+ {
+ if ( FCC1 == *anih32 )
+ {
+ wxUint32 *pData = new wxUint32[datalen/4];
+ stream.Read(pData, datalen);
+ int nIcons = wxINT32_SWAP_ON_BE(*(pData + 1));
+ delete[] pData;
+ return nIcons;
+ }
+ else
+ stream.SeekI(stream.TellI() + datalen);
+ }
+
+ // try to read next data chunk:
+ stream.Read(&FCC1, 4);
+ }
+
+ return wxNOT_FOUND;
+}
projects / wxWidgets.git / blobdiff