X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a37e742445fab5311049c705ed7c17aeff878abd..66f75561893ea7b4bf429d1882d9cc0407ba932d:/src/common/imagpng.cpp diff --git a/src/common/imagpng.cpp b/src/common/imagpng.cpp index 21bcf6ee4d..32845b9afe 100644 --- a/src/common/imagpng.cpp +++ b/src/common/imagpng.cpp @@ -25,6 +25,7 @@ #if wxUSE_IMAGE && wxUSE_LIBPNG #include "wx/imagpng.h" +#include "wx/versioninfo.h" #ifndef WX_PRECOMP #include "wx/log.h" @@ -148,29 +149,31 @@ struct wxPNGInfoStruct extern "C" { -void PNGLINKAGEMODE wx_PNG_stream_reader( png_structp png_ptr, png_bytep data, - png_size_t length ) +static void PNGLINKAGEMODE wx_PNG_stream_reader( png_structp png_ptr, png_bytep data, + png_size_t length ) { WX_PNG_INFO(png_ptr)->stream.in->Read(data, length); } -void PNGLINKAGEMODE wx_PNG_stream_writer( png_structp png_ptr, png_bytep data, - png_size_t length ) +static void PNGLINKAGEMODE wx_PNG_stream_writer( png_structp png_ptr, png_bytep data, + png_size_t length ) { WX_PNG_INFO(png_ptr)->stream.out->Write(data, length); } -void +static void PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message) { wxPNGInfoStruct *info = png_ptr ? WX_PNG_INFO(png_ptr) : NULL; if ( !info || info->verbose ) + { wxLogWarning( wxString::FromAscii(message) ); + } } // from pngerror.c // so that the libpng doesn't send anything on stderr -void +static void PNGLINKAGEMODE wx_png_error(png_structp png_ptr, png_const_charp message) { wx_png_warning(NULL, message); @@ -302,7 +305,7 @@ bool wxPNGHandler::DoCanRead( wxInputStream& stream ) { 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; return memcmp(hdr, "\211PNG", WXSIZEOF(hdr)) == 0; @@ -385,7 +388,7 @@ void CopyDataFromPNG(wxImage *image, // must be opaque then as otherwise we shouldn't be // using the mask at all - wxASSERT_MSG( IsOpaque(a), _T("logic error") ); + wxASSERT_MSG( IsOpaque(a), wxT("logic error") ); // fall through @@ -453,7 +456,7 @@ void CopyDataFromPNG(wxImage *image, { // must be opaque then as otherwise we shouldn't be // using the mask at all - wxASSERT_MSG( IsOpaque(a), _T("logic error") ); + wxASSERT_MSG( IsOpaque(a), wxT("logic error") ); // if we couldn't find a unique colour for the // mask, we can have real pixels with the same @@ -538,7 +541,7 @@ wxPNGHandler::LoadFile(wxImage *image, goto error; png_read_info( png_ptr, info_ptr ); - png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, (int*) NULL, (int*) NULL ); + png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, NULL, NULL ); if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_expand( png_ptr ); @@ -558,18 +561,16 @@ wxPNGHandler::LoadFile(wxImage *image, if (!image->Ok()) goto error; - lines = (unsigned char **)malloc( (size_t)(height * sizeof(unsigned char *)) ); + // initialize all line pointers to NULL to ensure that they can be safely + // free()d if an error occurs before all of them could be allocated + lines = (unsigned char **)calloc(height, sizeof(unsigned char *)); if ( !lines ) goto error; for (i = 0; i < height; i++) { if ((lines[i] = (unsigned char *)malloc( (size_t)(width * (sizeof(unsigned char) * 4)))) == NULL) - { - for ( unsigned int n = 0; n < i; n++ ) - free( lines[n] ); goto error; - } } png_read_image( png_ptr, lines ); @@ -610,7 +611,9 @@ wxPNGHandler::LoadFile(wxImage *image, error: if (verbose) + { wxLogError(_("Couldn't load a PNG image - file is corrupted or not enough memory.")); + } if ( image->Ok() ) { @@ -659,7 +662,9 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos if (!png_ptr) { if (verbose) + { wxLogError(_("Couldn't save PNG image.")); + } return false; } @@ -668,7 +673,9 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos { png_destroy_write_struct( &png_ptr, (png_infopp)NULL ); if (verbose) + { wxLogError(_("Couldn't save PNG image.")); + } return false; } @@ -676,7 +683,9 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos { png_destroy_write_struct( &png_ptr, (png_infopp)NULL ); if (verbose) + { wxLogError(_("Couldn't save PNG image.")); + } return false; } @@ -691,9 +700,6 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos ? image->GetOptionInt(wxIMAGE_OPTION_PNG_BITDEPTH) : 8; - wxASSERT_MSG( iBitDepth == 8 || iBitDepth == 16, - _T("PNG bit depth must be 8 or 16") ); - bool bHasAlpha = image->HasAlpha(); bool bHasMask = image->HasMask(); bool bUseAlpha = bHasAlpha || bHasMask; @@ -710,6 +716,21 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos : PNG_COLOR_TYPE_GRAY; } + if (image->HasOption(wxIMAGE_OPTION_PNG_FILTER)) + png_set_filter( png_ptr, PNG_FILTER_TYPE_BASE, image->GetOptionInt(wxIMAGE_OPTION_PNG_FILTER) ); + + if (image->HasOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL)) + png_set_compression_level( png_ptr, image->GetOptionInt(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL) ); + + if (image->HasOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL)) + png_set_compression_mem_level( png_ptr, image->GetOptionInt(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL) ); + + if (image->HasOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY)) + png_set_compression_strategy( png_ptr, image->GetOptionInt(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY) ); + + if (image->HasOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE)) + png_set_compression_buffer_size( png_ptr, image->GetOptionInt(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE) ); + png_set_IHDR( png_ptr, info_ptr, image->GetWidth(), image->GetHeight(), iBitDepth, iPngColorType, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, @@ -761,7 +782,7 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos break; default: - wxFAIL_MSG( _T("unsupported image resolution units") ); + wxFAIL_MSG( wxT("unsupported image resolution units") ); } if ( resX && resY ) @@ -808,7 +829,7 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos switch ( iColorType ) { default: - wxFAIL_MSG( _T("unknown wxPNG_TYPE_XXX") ); + wxFAIL_MSG( wxT("unknown wxPNG_TYPE_XXX") ); // fall through case wxPNG_TYPE_COLOUR: @@ -882,4 +903,18 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos #endif // wxUSE_STREAMS +/*static*/ wxVersionInfo wxPNGHandler::GetLibraryVersionInfo() +{ + // The version string seems to always have a leading space and a trailing + // new line, get rid of them both. + wxString str = png_get_header_version(NULL) + 1; + str.Replace("\n", ""); + + return wxVersionInfo("libpng", + PNG_LIBPNG_VER_MAJOR, + PNG_LIBPNG_VER_MINOR, + PNG_LIBPNG_VER_RELEASE, + str); +} + #endif // wxUSE_LIBPNG