X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/649d13e837b25f7b948ccfae02b18131f3a0a743..2877659b059c5d20b07b585e26391dfd9ed780a2:/src/common/imagbmp.cpp?ds=sidebyside diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp index 924bcf4c3d..247a300e6d 100644 --- a/src/common/imagbmp.cpp +++ b/src/common/imagbmp.cpp @@ -7,7 +7,7 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "imagbmp.h" #endif @@ -20,7 +20,7 @@ #include "wx/defs.h" -#if wxUSE_IMAGE && wxUSE_STREAMS +#if wxUSE_IMAGE #include "wx/imagbmp.h" #include "wx/bitmap.h" @@ -43,7 +43,7 @@ #endif #ifdef __WXMSW__ -#include +#include "wx/msw/wrapwin.h" #endif //----------------------------------------------------------------------------- @@ -52,9 +52,17 @@ IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler) +#if wxUSE_STREAMS + #ifndef BI_RGB -#define BI_RGB 0 + #define BI_RGB 0 +#endif + +#ifndef BI_RLE8 #define BI_RLE8 1 +#endif + +#ifndef BI_RLE4 #define BI_RLE4 2 #endif @@ -67,7 +75,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler) bool wxBMPHandler::SaveFile(wxImage *image, wxOutputStream& stream, bool verbose) -{ +{ return SaveDib(image, stream, verbose, TRUE/*IsBmp*/, FALSE/*IsMask*/); } @@ -82,17 +90,17 @@ bool wxBMPHandler::SaveDib(wxImage *image, if ( !image->Ok() ) { - if ( verbose ) + if ( verbose ) wxLogError(_("BMP: Couldn't save invalid image.")); return FALSE; } // get the format of the BMP file to save, else use 24bpp unsigned format = wxBMP_24BPP; - if ( image->HasOption(wxBMP_FORMAT) ) - format = image->GetOptionInt(wxBMP_FORMAT); + if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) ) + format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT); - unsigned bpp; // # of bits per pixel + wxUint16 bpp; // # of bits per pixel int palette_size; // # of color map entries, ie. 2^bpp colors // set the bpp and appropriate palette_size, and do additional checks @@ -117,7 +125,7 @@ bool wxBMPHandler::SaveDib(wxImage *image, ) { if ( verbose ) - wxLogError(_("BMP: wImage doesn't have own wxPalette.")); + wxLogError(_("BMP: wxImage doesn't have own wxPalette.")); return FALSE; } bpp = 8; @@ -179,7 +187,7 @@ bool wxBMPHandler::SaveDib(wxImage *image, hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap hdr.num_signif_clrs = 0; // all colors are significant - + if ( IsBmp ) { if (// VS: looks ugly but compilers tend to do ugly things with structs, @@ -188,7 +196,7 @@ bool wxBMPHandler::SaveDib(wxImage *image, !stream.Write(&hdr.magic, 2) || !stream.Write(&hdr.filesize, 4) || !stream.Write(&hdr.reserved, 4) || - !stream.Write(&hdr.data_offset, 4) + !stream.Write(&hdr.data_offset, 4) ) { if (verbose) @@ -443,20 +451,21 @@ typedef struct unsigned char r, g, b; } _cmap; -bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, +bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, int bpp, int ncolors, int comp, off_t bmpOffset, wxInputStream& stream, bool verbose, bool IsBmp, bool hasPalette) { wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0; int rshift = 0, gshift = 0, bshift = 0; + int rbits = 0, gbits = 0, bbits = 0; wxInt32 dbuf[4]; wxInt8 bbuf[4]; wxUint8 aByte; wxUint16 aWord; // allocate space for palette if needed: - _cmap *cmap = NULL; + _cmap *cmap; if ( bpp < 16 ) { @@ -474,7 +483,7 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, // destroy existing here instead of: image->Destroy(); image->Create(width, height); - + unsigned char *ptr = image->GetData(); if ( !ptr ) @@ -529,11 +538,11 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, { int bit = 0; stream.Read(dbuf, 4 * 3); - bmask = wxINT32_SWAP_ON_BE(dbuf[0]); + rmask = wxINT32_SWAP_ON_BE(dbuf[0]); gmask = wxINT32_SWAP_ON_BE(dbuf[1]); - rmask = wxINT32_SWAP_ON_BE(dbuf[2]); - // find shift amount.. ugly, but i can't think of a better way: - for (bit = 0; bit < bpp; bit++) + bmask = wxINT32_SWAP_ON_BE(dbuf[2]); + // find shift amount (Least significant bit of mask) + for (bit = bpp-1; bit>=0; bit--) { if (bmask & (1 << bit)) bshift = bit; @@ -542,6 +551,16 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, if (rmask & (1 << bit)) rshift = bit; } + // Find number of bits in mask (MSB-LSB+1) + for (bit = 0; bit < bpp; bit++) + { + if (bmask & (1 << bit)) + bbits = bit-bshift+1; + if (gmask & (1 << bit)) + gbits = bit-gshift+1; + if (rmask & (1 << bit)) + rbits = bit-rshift+1; + } } else if ( bpp == 16 ) { @@ -551,6 +570,9 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, rshift = 10; gshift = 5; bshift = 0; + rbits = 5; + gbits = 5; + bbits = 5; } else if ( bpp == 32 ) { @@ -560,6 +582,9 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, rshift = 16; gshift = 8; bshift = 0; + rbits = 8; + gbits = 8; + bbits = 8; } } @@ -583,27 +608,23 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, ptr = data; } - int line = 0; - int column = 0; int linesize = ((width * bpp + 31) / 32) * 4; /* BMPs are stored upside down */ - for ( line = (height - 1); line >= 0; line-- ) + for ( int line = (height - 1); line >= 0; line-- ) { int linepos = 0; - for ( column = 0; column < width; ) + for ( int column = 0; column < width ; ) { if ( bpp < 16 ) { - int index = 0; linepos++; aByte = stream.GetC(); if ( bpp == 1 ) { - int bit = 0; - for (bit = 0; bit < 8 && column < width; bit++) + for (int bit = 0; bit < 8 && column < width; bit++) { - index = ((aByte & (0x80 >> bit)) ? 1 : 0); + int index = ((aByte & (0x80 >> bit)) ? 1 : 0); ptr[poffset] = cmap[index].r; ptr[poffset + 1] = cmap[index].g; ptr[poffset + 2] = cmap[index].b; @@ -614,18 +635,76 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, { if ( comp == BI_RLE4 ) { - if ( verbose ) - wxLogError(_("DIB Header: Cannot deal with 4bit encoded yet.")); - image->Destroy(); - delete[] cmap; - return FALSE; + wxUint8 first; + first = aByte; + aByte = stream.GetC(); + if ( first == 0 ) + { + if ( aByte == 0 ) + { + if ( column > 0 ) + column = width; + } + else if ( aByte == 1 ) + { + column = width; + line = -1; + } + else if ( aByte == 2 ) + { + aByte = stream.GetC(); + column += aByte; + linepos = column * bpp / 4; + aByte = stream.GetC(); + line -= aByte; // upside down + } + else + { + int absolute = aByte; + wxUint8 nibble[2] ; + int readBytes = 0 ; + for (int k = 0; k < absolute; k++) + { + if ( !(k % 2 ) ) + { + ++readBytes ; + aByte = stream.GetC(); + nibble[0] = ( (aByte & 0xF0) >> 4 ) ; + nibble[1] = ( aByte & 0x0F ) ; + } + ptr[poffset ] = cmap[nibble[k%2]].r; + ptr[poffset + 1] = cmap[nibble[k%2]].g; + ptr[poffset + 2] = cmap[nibble[k%2]].b; + column++; + if ( k % 2 ) + linepos++; + } + if ( readBytes & 0x01 ) + aByte = stream.GetC(); + } + } + else + { + wxUint8 nibble[2] ; + nibble[0] = ( (aByte & 0xF0) >> 4 ) ; + nibble[1] = ( aByte & 0x0F ) ; + + for ( int l = 0; l < first && column < width; l++ ) + { + ptr[poffset ] = cmap[nibble[l%2]].r; + ptr[poffset + 1] = cmap[nibble[l%2]].g; + ptr[poffset + 2] = cmap[nibble[l%2]].b; + column++; + if ( l % 2 ) + linepos++; + } + } } else { - int nibble = 0; - for (nibble = 0; nibble < 2 && column < width; nibble++) + for (int nibble = 0; nibble < 2 && column < width; nibble++) { - index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4)); + int index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4)); if ( index >= 16 ) index = 15; ptr[poffset] = cmap[index].r; @@ -698,62 +777,67 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, // linepos += size; seems to be wrong, RR } } - } - else if ( bpp == 24 ) - { - stream.Read(bbuf, 3); - linepos += 3; - ptr[poffset ] = (unsigned char)bbuf[2]; - ptr[poffset + 1] = (unsigned char)bbuf[1]; - ptr[poffset + 2] = (unsigned char)bbuf[0]; - column++; - } - else if ( bpp == 16 ) - { - unsigned char temp; - stream.Read(&aWord, 2); - aWord = wxUINT16_SWAP_ON_BE(aWord); - linepos += 2; - temp = (aWord & rmask) >> rshift; - ptr[poffset] = temp; - temp = (aWord & gmask) >> gshift; - ptr[poffset + 1] = temp; - temp = (aWord & bmask) >> bshift; - ptr[poffset + 2] = temp; - column++; - } - else - { - unsigned char temp; - stream.Read(&aDword, 4); - aDword = wxINT32_SWAP_ON_BE(aDword); - linepos += 4; - temp = (aDword & rmask) >> rshift; - ptr[poffset] = temp; - temp = (aDword & gmask) >> gshift; - ptr[poffset + 1] = temp; - temp = (aDword & bmask) >> bshift; - ptr[poffset + 2] = temp; - column++; - } - } - while ( (linepos < linesize) && (comp != 1) && (comp != 2) ) - { - stream.Read(&aByte, 1); - linepos += 1; - if ( stream.LastError() != wxStream_NOERROR ) - break; - } - } - if (cmap) - delete[] cmap; - - image->SetMask(FALSE); - - return stream.IsOk(); + } + else if ( bpp == 24 ) + { + stream.Read(bbuf, 3); + linepos += 3; + ptr[poffset ] = (unsigned char)bbuf[2]; + ptr[poffset + 1] = (unsigned char)bbuf[1]; + ptr[poffset + 2] = (unsigned char)bbuf[0]; + column++; + } + else if ( bpp == 16 ) + { + unsigned char temp; + stream.Read(&aWord, 2); + aWord = wxUINT16_SWAP_ON_BE(aWord); + linepos += 2; + /* use the masks and calculated amonut of shift + to retrieve the color data out of the word. Then + shift it left by (8 - number of bits) such that + the image has the proper dynamic range */ + temp = (aWord & rmask) >> rshift << (8-rbits); + ptr[poffset] = temp; + temp = (aWord & gmask) >> gshift << (8-gbits); + ptr[poffset + 1] = temp; + temp = (aWord & bmask) >> bshift << (8-bbits); + ptr[poffset + 2] = temp; + column++; + } + else + { + unsigned char temp; + stream.Read(&aDword, 4); + aDword = wxINT32_SWAP_ON_BE(aDword); + linepos += 4; + temp = (aDword & rmask) >> rshift; + ptr[poffset] = temp; + temp = (aDword & gmask) >> gshift; + ptr[poffset + 1] = temp; + temp = (aDword & bmask) >> bshift; + ptr[poffset + 2] = temp; + column++; + } + } + while ( (linepos < linesize) && (comp != 1) && (comp != 2) ) + { + stream.Read(&aByte, 1); + linepos += 1; + if ( !stream ) + break; + } + } + + delete[] cmap; + + image->SetMask(FALSE); + + const wxStreamError err = stream.GetLastError(); + return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF; } -bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, +bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, bool verbose, bool IsBmp) { wxUint16 aWord; @@ -785,7 +869,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, int width = (int)wxINT32_SWAP_ON_BE(dbuf[0]); int height = (int)wxINT32_SWAP_ON_BE(dbuf[1]); if ( !IsBmp)height = height / 2; // for icons divide by 2 - + if ( width > 32767 ) { if (verbose) @@ -815,7 +899,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, stream.Read(dbuf, 4 * 4); int comp = (int)wxINT32_SWAP_ON_BE(dbuf[0]); - if ( comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && + if ( comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS ) { if (verbose) @@ -865,7 +949,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, return TRUE; } -bool wxBMPHandler::LoadFile(wxImage *image, wxInputStream& stream, +bool wxBMPHandler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index)) { // Read a single DIB fom the file: @@ -876,19 +960,25 @@ bool wxBMPHandler::DoCanRead(wxInputStream& stream) { unsigned char hdr[2]; - stream.Read(hdr, 2); - stream.SeekI(-2, wxFromCurrent); - return (hdr[0] == 'B' && hdr[1] == 'M'); + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return FALSE; + + // do we have the BMP file signature? + return hdr[0] == 'B' && hdr[1] == 'M'; } +#endif // wxUSE_STREAMS +#if wxUSE_ICO_CUR //----------------------------------------------------------------------------- // wxICOHandler //----------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxICOHandler, wxBMPHandler) +#if wxUSE_STREAMS + struct ICONDIRENTRY { wxUint8 bWidth; // Width of the image @@ -935,7 +1025,7 @@ bool wxICOHandler::SaveFile(wxImage *image, int images = 1; // only generate one image - // VS: This is a hack of sort - since ICO and CUR files are almost + // VS: This is a hack of sort - since ICO and CUR files are almost // identical, we have all the meat in wxICOHandler and check for // the actual (handler) type when the code has to distinguish between // the two formats @@ -966,7 +1056,7 @@ bool wxICOHandler::SaveFile(wxImage *image, wxImage mask; if ( image->HasMask() ) - { + { // make another image with black/white: mask = image->ConvertToMono (image->GetMaskRed(), image->GetMaskGreen(), image->GetMaskBlue() ); @@ -982,8 +1072,8 @@ bool wxICOHandler::SaveFile(wxImage *image, { for (j = 0; j < mask.GetHeight(); j++) { - if ((r == mask.GetRed(i, j)) && - (g == mask.GetGreen(i, j))&& + if ((r == mask.GetRed(i, j)) && + (g == mask.GetGreen(i, j))&& (b == mask.GetBlue(i, j)) ) image->SetRGB(i, j, 0, 0, 0 ); } @@ -1001,10 +1091,10 @@ bool wxICOHandler::SaveFile(wxImage *image, } // Set the formats for image and mask // (Windows never saves with more than 8 colors): - image->SetOption(wxBMP_FORMAT, wxBMP_8BPP); + image->SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_8BPP); // monochome bitmap: - mask.SetOption(wxBMP_FORMAT, wxBMP_1BPP_BW); + mask.SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_1BPP_BW); bool IsBmp = FALSE; bool IsMask = FALSE; @@ -1049,11 +1139,11 @@ bool wxICOHandler::SaveFile(wxImage *image, icondirentry.wBitCount = wxUINT16_SWAP_ON_BE(wxBMP_8BPP); if ( type == 2 /*CUR*/) { - int hx = image->HasOption(wxCUR_HOTSPOT_X) ? - image->GetOptionInt(wxCUR_HOTSPOT_X) : + int hx = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ? + image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) : image->GetWidth() / 2; - int hy = image->HasOption(wxCUR_HOTSPOT_Y) ? - image->GetOptionInt(wxCUR_HOTSPOT_Y) : + int hy = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ? + image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) : image->GetHeight() / 2; // actually write the values of the hot spot here: @@ -1106,19 +1196,27 @@ bool wxICOHandler::SaveFile(wxImage *image, return TRUE; } -bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, +bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index) +{ + stream.SeekI(0); + return DoLoadFile(image, stream, verbose, index); +} + +bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, + bool WXUNUSED(verbose), int index) { bool bResult = FALSE; bool IsBmp = FALSE; ICONDIR IconDir; - stream.SeekI(0); + + 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; @@ -1136,7 +1234,7 @@ bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, if ( pCurrentEntry->bColorCount == 0 ) pCurrentEntry->bColorCount = 255; if ( pCurrentEntry->bColorCount >= colmax ) - { + { iSel = i; wMax = pCurrentEntry->bWidth; colmax = pCurrentEntry->bColorCount; @@ -1144,14 +1242,14 @@ bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, } 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.")); @@ -1161,13 +1259,14 @@ bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, { // seek to selected icon: pCurrentEntry = pIconDirEntry + iSel; - stream.SeekI(wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart); + stream.SeekI(iPos + wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart); bResult = LoadDib(image, stream, TRUE, IsBmp); - if ( bResult && this->GetType() == wxBITMAP_TYPE_CUR && nType == 2 ) + 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(wxCUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes)); - image->SetOption(wxCUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount)); + 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; @@ -1177,23 +1276,26 @@ bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, 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; - stream.SeekI (0); - stream.Read(hdr, 4); - stream.SeekI(-4, wxFromCurrent); - //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'); + // 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'; } +#endif // wxUSE_STREAMS //----------------------------------------------------------------------------- @@ -1202,15 +1304,188 @@ bool wxICOHandler::DoCanRead(wxInputStream& stream) IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler) +#if wxUSE_STREAMS + bool wxCURHandler::DoCanRead(wxInputStream& stream) { + stream.SeekI(0); unsigned char hdr[4]; + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return FALSE; - stream.SeekI (0); - stream.Read(hdr, 4); - stream.SeekI(-4, wxFromCurrent); - //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'); + // 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'; } -#endif // wxUSE_IMAGE && wxUSE_STREAMS +#endif // wxUSE_STREAMS + +//----------------------------------------------------------------------------- +// wxANIHandler +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler) + +#if wxUSE_STREAMS + +bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream, + bool verbose, int index) +{ + wxInt32 FCC1, FCC2; + wxUint32 datalen; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + 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 ; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + wxInt32 anih32; + memcpy( &anih32, "anih", 4 ); + + 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 ; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + wxInt32 anih32; + memcpy( &anih32, "anih", 4 ); + + 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; +} + +#endif // wxUSE_STREAMS + +#endif // wxUSE_ICO_CUR + +#endif // wxUSE_IMAGE