X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/57bd4c6031d438f11af0ec540136f49a928b923c..bad6c5e264fe9a7ac9e931d071d72acdabb3401e:/src/common/imagbmp.cpp diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp index 0dced8f819..388a0c8224 100644 --- a/src/common/imagbmp.cpp +++ b/src/common/imagbmp.cpp @@ -16,6 +16,8 @@ #if wxUSE_IMAGE +#include "wx/imagbmp.h" + #ifndef WX_PRECOMP #ifdef __WXMSW__ #include "wx/msw/wrapwin.h" @@ -23,24 +25,20 @@ #include "wx/log.h" #include "wx/app.h" #include "wx/bitmap.h" - #include "wx/module.h" + #include "wx/palette.h" + #include "wx/intl.h" + #include "wx/math.h" #endif -#include "wx/imagbmp.h" #include "wx/filefn.h" #include "wx/wfstream.h" -#include "wx/intl.h" #include "wx/quantize.h" +#include "wx/scopeguard.h" +#include "wx/anidecod.h" // For memcpy #include -#ifdef __SALFORDC__ -#ifdef FAR -#undef FAR -#endif -#endif - //----------------------------------------------------------------------------- // wxBMPHandler //----------------------------------------------------------------------------- @@ -152,7 +150,7 @@ bool wxBMPHandler::SaveDib(wxImage *image, wxUint16 bpp; // bits per pixel wxUint32 compression; // compression method wxUint32 size_of_bmp; // size of the bitmap - wxUint32 h_res, v_res; // image resolution in dpi + wxUint32 h_res, v_res; // image resolution in pixels-per-meter wxUint32 num_clrs; // number of colors used wxUint32 num_signif_clrs;// number of significant colors } hdr; @@ -179,7 +177,36 @@ bool wxBMPHandler::SaveDib(wxImage *image, hdr.bpp = wxUINT16_SWAP_ON_BE(bpp); hdr.compression = 0; // RGB uncompressed hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight()); - hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard + + // get the resolution from the image options or fall back to 72dpi standard + // for the BMP format if not specified + int hres, vres; + switch ( GetResolutionFromOptions(*image, &hres, &vres) ) + { + default: + wxFAIL_MSG( _T("unexpected image resolution units") ); + // fall through + + case wxIMAGE_RESOLUTION_NONE: + hres = + vres = 72; + // fall through to convert it to correct units + + case wxIMAGE_RESOLUTION_INCHES: + // convert resolution in inches to resolution in centimeters + hres = (int)(10*mm2inches*hres); + vres = (int)(10*mm2inches*vres); + // fall through to convert it to resolution in meters + + case wxIMAGE_RESOLUTION_CM: + // convert resolution in centimeters to resolution in meters + hres *= 100; + vres *= 100; + break; + } + + hdr.h_res = wxUINT32_SWAP_ON_BE(hres); + hdr.v_res = wxUINT32_SWAP_ON_BE(vres); hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap hdr.num_signif_clrs = 0; // all colors are significant @@ -442,18 +469,20 @@ bool wxBMPHandler::SaveDib(wxImage *image, } -typedef struct +struct BMPPalette { + static void Free(BMPPalette* pal) { delete [] pal; } + unsigned char r, g, b; -} _cmap; +}; bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, int bpp, int ncolors, int comp, wxFileOffset bmpOffset, wxInputStream& stream, bool verbose, bool IsBmp, bool hasPalette) { - wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0; - int rshift = 0, gshift = 0, bshift = 0; + wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0, amask = 0; + int rshift = 0, gshift = 0, bshift = 0, ashift = 0; int rbits = 0, gbits = 0, bbits = 0; wxInt32 dbuf[4]; wxInt8 bbuf[4]; @@ -461,11 +490,11 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, wxUint16 aWord; // allocate space for palette if needed: - _cmap *cmap; + BMPPalette *cmap; if ( bpp < 16 ) { - cmap = new _cmap[ncolors]; + cmap = new BMPPalette[ncolors]; if ( !cmap ) { if (verbose) @@ -473,8 +502,12 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, return false; } } - else + else // no palette + { cmap = NULL; + } + + wxON_BLOCK_EXIT1(&BMPPalette::Free, cmap); // destroy existing here instead of: image->Destroy(); @@ -486,11 +519,27 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, { if ( verbose ) wxLogError( _("BMP: Couldn't allocate memory.") ); - if ( cmap ) - delete[] cmap; return false; } + unsigned char *alpha; + if ( bpp == 32 ) + { + // tell the image to allocate an alpha buffer + image->SetAlpha(); + alpha = image->GetAlpha(); + if ( !alpha ) + { + if ( verbose ) + wxLogError(_("BMP: Couldn't allocate memory.")); + return false; + } + } + else // no alpha + { + alpha = NULL; + } + // Reading the palette, if it exists: if ( bpp < 16 && ncolors != 0 ) { @@ -575,6 +624,9 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, rmask = 0x00FF0000; gmask = 0x0000FF00; bmask = 0x000000FF; + amask = 0xFF000000; + + ashift = 24; rshift = 16; gshift = 8; bshift = 0; @@ -588,7 +640,13 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, * Reading the image data */ if ( IsBmp ) - stream.SeekI(bmpOffset); // else icon, just carry on + { + // NOTE: seeking a positive amount in wxFromCurrent mode allows us to + // load even non-seekable streams (see wxInputStream::SeekI docs)! + if (stream.SeekI(bmpOffset, wxFromCurrent) == wxInvalidOffset) + return false; + //else: icon, just carry on + } unsigned char *data = ptr; @@ -813,6 +871,11 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, ptr[poffset + 1] = temp; temp = (unsigned char)((aDword & bmask) >> bshift); ptr[poffset + 2] = temp; + if ( alpha ) + { + temp = (unsigned char)((aDword & amask) >> ashift); + alpha[line * width + column] = temp; + } column++; } } @@ -825,8 +888,6 @@ bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, } } - delete[] cmap; - image->SetMask(false); const wxStreamError err = stream.GetLastError(); @@ -840,15 +901,9 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, wxInt32 dbuf[4]; wxInt8 bbuf[4]; - wxFileOffset offset = 0; // keep gcc quiet if ( IsBmp ) { // read the header off the .BMP format file - - offset = stream.TellI(); - if (offset == wxInvalidOffset) - offset = 0; - stream.Read(bbuf, 2); stream.Read(dbuf, 16); } @@ -859,7 +914,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, #if 0 // unused wxInt32 size = wxINT32_SWAP_ON_BE(dbuf[0]); #endif - offset = offset + wxINT32_SWAP_ON_BE(dbuf[2]); + wxFileOffset offset = wxINT32_SWAP_ON_BE(dbuf[2]); stream.Read(dbuf, 4 * 2); int width = wxINT32_SWAP_ON_BE((int)dbuf[0]); @@ -904,6 +959,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, } stream.Read(dbuf, 4 * 2); + int ncolors = wxINT32_SWAP_ON_BE( (int)dbuf[0] ); if (ncolors == 0) ncolors = 1 << bpp; @@ -942,6 +998,11 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, } + // the resolution in the bitmap header is in meters, convert to centimeters + image->SetOption(wxIMAGE_OPTION_RESOLUTIONUNIT, wxIMAGE_RESOLUTION_CM); + image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, dbuf[2]/100); + image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, dbuf[3]/100); + return true; } @@ -956,7 +1017,7 @@ bool wxBMPHandler::DoCanRead(wxInputStream& stream) { unsigned char hdr[2]; - if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here return false; // do we have the BMP file signature? @@ -1113,7 +1174,7 @@ bool wxICOHandler::SaveFile(wxImage *image, } wxUint32 Size = cStream.GetSize(); - // wxCountingOutputStream::Ok() always returns true for now and this + // wxCountingOutputStream::IsOk() always returns true for now and this // "if" provokes VC++ warnings in optimized build #if 0 if ( !cStream.Ok() ) @@ -1194,7 +1255,6 @@ bool wxICOHandler::SaveFile(wxImage *image, bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index) { - stream.SeekI(0); return DoLoadFile(image, stream, verbose, index); } @@ -1206,9 +1266,9 @@ bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, ICONDIR IconDir; - wxFileOffset 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); @@ -1219,9 +1279,13 @@ bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, int colmax = 0; int iSel = wxNOT_FOUND; - for (int i = 0; i < nIcons; i++ ) + // remember how many bytes we read from the stream: + wxFileOffset alreadySeeked = sizeof(IconDir); + + for (unsigned int i = 0; i < nIcons; i++ ) { - stream.Read(pCurrentEntry, sizeof(ICONDIRENTRY)); + alreadySeeked += stream.Read(pCurrentEntry, sizeof(ICONDIRENTRY)).LastRead(); + // bHeight and bColorCount are wxUint8 if ( pCurrentEntry->bWidth >= wMax ) { @@ -1235,6 +1299,7 @@ bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, colmax = pCurrentEntry->bColorCount; } } + pCurrentEntry++; } @@ -1254,7 +1319,13 @@ bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, { // seek to selected icon: pCurrentEntry = pIconDirEntry + iSel; - stream.SeekI(iPos + wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart); + + // NOTE: seeking a positive amount in wxFromCurrent mode allows us to + // load even non-seekable streams (see wxInputStream::SeekI docs)! + wxFileOffset offset = wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset) - alreadySeeked; + if (offset != 0 && stream.SeekI(offset, wxFromCurrent) == wxInvalidOffset) + return false; + bResult = LoadDib(image, stream, true, IsBmp); bool bIsCursorType = (this->GetType() == wxBITMAP_TYPE_CUR) || (this->GetType() == wxBITMAP_TYPE_ANI); if ( bResult && bIsCursorType && nType == 2 ) @@ -1264,26 +1335,27 @@ bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount)); } } - delete[] pIconDirEntry; + + delete [] pIconDirEntry; + return bResult; } -int wxICOHandler::GetImageCount(wxInputStream& stream) +int wxICOHandler::DoGetImageCount(wxInputStream& stream) { ICONDIR IconDir; - wxFileOffset 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; + + if (stream.Read(&IconDir, sizeof(IconDir)).LastRead() != sizeof(IconDir)) + // it's ok to modify the stream position here + return 0; + + return (int)wxUINT16_SWAP_ON_BE(IconDir.idCount); } bool wxICOHandler::DoCanRead(wxInputStream& stream) { - stream.SeekI(0); unsigned char hdr[4]; - if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here return false; // hdr[2] is one for an icon and two for a cursor @@ -1303,9 +1375,8 @@ IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler) bool wxCURHandler::DoCanRead(wxInputStream& stream) { - stream.SeekI(0); unsigned char hdr[4]; - if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here return false; // hdr[2] is one for an icon and two for a cursor @@ -1323,160 +1394,29 @@ IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler) #if wxUSE_STREAMS bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream, - bool verbose, int index) + bool WXUNUSED(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 ) + wxANIDecoder decoder; + if (!decoder.Load(stream)) 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; + return decoder.ConvertToImage(index != -1 ? (size_t)index : 0, image); } 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; + wxANIDecoder decod; + return decod.CanRead(stream); + // it's ok to modify the stream position here } -int wxANIHandler::GetImageCount(wxInputStream& stream) +int wxANIHandler::DoGetImageCount(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 ) + wxANIDecoder decoder; + if (!decoder.Load(stream)) // it's ok to modify the stream position here 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; + return decoder.GetFrameCount(); } #endif // wxUSE_STREAMS