X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7a893a3152a6ac676b0409320daef188a7be1b7b..bad6c5e264fe9a7ac9e931d071d72acdabb3401e:/src/common/imagpng.cpp diff --git a/src/common/imagpng.cpp b/src/common/imagpng.cpp index bf3b40ab49..83446867ad 100644 --- a/src/common/imagpng.cpp +++ b/src/common/imagpng.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: src/common/imagepng.cpp +// Name: src/common/imagpng.cpp // Purpose: wxImage PNG handler // Author: Robert Roebling // RCS-ID: $Id$ @@ -11,10 +11,6 @@ // declarations // ============================================================================ -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation "imagpng.h" -#endif - // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- @@ -23,35 +19,25 @@ #include "wx/wxprec.h" #ifdef __BORLANDC__ - #pragma hdrstop -#endif - -#ifndef WX_PRECOMP - #include "wx/defs.h" + #pragma hdrstop #endif #if wxUSE_IMAGE && wxUSE_LIBPNG #include "wx/imagpng.h" -#include "wx/bitmap.h" -#include "wx/debug.h" -#include "wx/log.h" -#include "wx/app.h" + +#ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/intl.h" + #include "wx/palette.h" + #include "wx/stream.h" +#endif + #include "png.h" -#include "wx/filefn.h" -#include "wx/wfstream.h" -#include "wx/intl.h" -#include "wx/module.h" // For memcpy #include -#ifdef __SALFORDC__ -#ifdef FAR -#undef FAR -#endif -#endif - // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -109,7 +95,9 @@ IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler) #if wxUSE_STREAMS #ifndef PNGLINKAGEMODE - #if defined(__WATCOMC__) && defined(__WXMSW__) + #ifdef PNGAPI + #define PNGLINKAGEMODE PNGAPI + #elif defined(__WATCOMC__) // we need an explicit cdecl for Watcom, at least according to // // http://sf.net/tracker/index.php?func=detail&aid=651492&group_id=9863&atid=109863 @@ -160,27 +148,19 @@ 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); } -// from pngerror.c -// so that the libpng doesn't send anything on stderr -void -PNGLINKAGEMODE wx_png_error(png_structp WXUNUSED(png_ptr), png_const_charp message) -{ - wxLogFatalError( wxString::FromAscii(message) ); -} - -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; @@ -188,6 +168,19 @@ PNGLINKAGEMODE wx_png_warning(png_structp png_ptr, png_const_charp message) wxLogWarning( wxString::FromAscii(message) ); } +// from pngerror.c +// so that the libpng doesn't send anything on stderr +static void +PNGLINKAGEMODE wx_png_error(png_structp png_ptr, png_const_charp message) +{ + wx_png_warning(NULL, message); + + // we're not using libpng built-in jump buffer (see comment before + // wxPNGInfoStruct above) so we have to return ourselves, otherwise libpng + // would just abort + longjmp(WX_PNG_INFO(png_ptr)->jmpbuf, 1); +} + } // extern "C" // ---------------------------------------------------------------------------- @@ -278,6 +271,7 @@ FindMaskColour(unsigned char **lines, png_uint_32 width, png_uint_32 height, r2 = *p++; g2 = *p++; b2 = *p++; + ++p; // jump over alpha wxImageHistogramEntry& entry = h[wxImageHistogram:: MakeKey(r2, g2, b2)]; @@ -308,7 +302,7 @@ 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; @@ -383,8 +377,8 @@ void CopyDataFromPNG(wxImage *image, if ( IsTransparent(a) ) { *ptrDst++ = rMask; - *ptrDst++ = bMask; *ptrDst++ = gMask; + *ptrDst++ = bMask; break; } // else: !transparent @@ -451,8 +445,8 @@ void CopyDataFromPNG(wxImage *image, if ( IsTransparent(a) ) { *ptrDst++ = rMask; - *ptrDst++ = bMask; *ptrDst++ = gMask; + *ptrDst++ = bMask; break; } else // !transparent @@ -507,13 +501,16 @@ wxPNGHandler::LoadFile(wxImage *image, bool verbose, int WXUNUSED(index)) { - // VZ: as this function uses setjmp() the only fool proof error handling + // VZ: as this function uses setjmp() the only fool-proof error handling // method is to use goto (setjmp is not really C++ dtors friendly...) unsigned char **lines = NULL; png_infop info_ptr = (png_infop) NULL; wxPNGInfoStruct wxinfo; + png_uint_32 i, width, height = 0; + int bit_depth, color_type, interlace_type; + wxinfo.verbose = verbose; wxinfo.stream.in = &stream; @@ -540,11 +537,8 @@ wxPNGHandler::LoadFile(wxImage *image, if (setjmp(wxinfo.jmpbuf)) goto error; - png_uint_32 i, width, height; - int bit_depth, color_type, interlace_type; - 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 ); @@ -564,22 +558,43 @@ 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 ); png_read_end( png_ptr, info_ptr ); + +#if wxUSE_PALETTE + if (color_type == PNG_COLOR_TYPE_PALETTE) + { + const size_t ncolors = info_ptr->num_palette; + unsigned char* r = new unsigned char[ncolors]; + unsigned char* g = new unsigned char[ncolors]; + unsigned char* b = new unsigned char[ncolors]; + + for (size_t j = 0; j < ncolors; j++) + { + r[j] = info_ptr->palette[j].red; + g[j] = info_ptr->palette[j].green; + b[j] = info_ptr->palette[j].blue; + } + + image->SetPalette(wxPalette(ncolors, r, g, b)); + delete[] r; + delete[] g; + delete[] b; + } +#endif // wxUSE_PALETTE + png_destroy_read_struct( &png_ptr, &info_ptr, (png_infopp) NULL ); // loaded successfully, now init wxImage with this data @@ -602,6 +617,9 @@ error: if ( lines ) { + for ( unsigned int n = 0; n < height; n++ ) + free( lines[n] ); + free( lines ); } @@ -671,9 +689,6 @@ 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; @@ -690,6 +705,21 @@ 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, @@ -720,6 +750,33 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos if ( iBitDepth == 16 ) iElements *= 2; + // save the image resolution if we have it + int resX, resY; + switch ( GetResolutionFromOptions(*image, &resX, &resY) ) + { + case wxIMAGE_RESOLUTION_INCHES: + { + const double INCHES_IN_METER = 10000.0 / 254; + resX = int(resX * INCHES_IN_METER); + resY = int(resY * INCHES_IN_METER); + } + break; + + case wxIMAGE_RESOLUTION_CM: + resX *= 100; + resY *= 100; + break; + + case wxIMAGE_RESOLUTION_NONE: + break; + + default: + wxFAIL_MSG( _T("unsupported image resolution units") ); + } + + if ( resX && resY ) + png_set_pHYs( png_ptr, info_ptr, resX, resY, PNG_RESOLUTION_METER ); + png_set_sBIT( png_ptr, info_ptr, &sig_bit ); png_write_info( png_ptr, info_ptr ); png_set_shift( png_ptr, &sig_bit );