X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fe9308c639e9738796028b56c40c58f2e8a648de..87f0b1323b7ac77f02133b836c8dfee63b0fd387:/src/common/imagjpeg.cpp diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp index 42b995aae9..88bcb4f313 100644 --- a/src/common/imagjpeg.cpp +++ b/src/common/imagjpeg.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: imagjpeg.cpp +// Name: src/common/imagjpeg.cpp // Purpose: wxImage JPEG handler // Author: Vaclav Slavik // RCS-ID: $Id$ @@ -7,35 +7,35 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation "imagjpeg.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif -#include "wx/defs.h" - #if wxUSE_IMAGE && wxUSE_LIBJPEG #include "wx/imagjpeg.h" -#include "wx/bitmap.h" -#include "wx/debug.h" -#include "wx/log.h" -#include "wx/app.h" - -// NB: Some compilers define boolean type in Windows headers -// (e.g. Watcom C++, but not Open Watcom). -// This causes a conflict with jmorecfg.h header from libjpeg, so we have -// to make sure libjpeg won't try to define boolean itself. This is done by -// defining HAVE_BOOLEAN. -#if defined(__WXMSW__) && (defined(__MWERKS__) || defined(__DIGITALMARS__) || (defined(__WATCOMC__) && __WATCOMC__ < 1200)) +#include "wx/versioninfo.h" + +#ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/app.h" + #include "wx/intl.h" + #include "wx/bitmap.h" + #include "wx/module.h" +#endif + +// A hack based on one from tif_jpeg.c to overcome the problem on Windows +// of rpcndr.h defining boolean with a different type to the jpeg headers. +// +// This hack is only necessary for an external jpeg library, the builtin one +// usually used on Windows doesn't use the type boolean, so always works. +// +#ifdef wxHACK_BOOLEAN #define HAVE_BOOLEAN - #include "wx/msw/wrapwin.h" + #define boolean wxHACK_BOOLEAN #endif extern "C" @@ -46,20 +46,18 @@ extern "C" #include "jpeglib.h" } +#ifndef HAVE_WXJPEG_BOOLEAN +typedef boolean wxjpeg_boolean; +#endif + #include "wx/filefn.h" #include "wx/wfstream.h" -#include "wx/intl.h" -#include "wx/module.h" // For memcpy #include // For JPEG library error handling #include -#ifdef __SALFORDC__ -#undef FAR -#endif - // ---------------------------------------------------------------------------- // types // ---------------------------------------------------------------------------- @@ -99,11 +97,14 @@ typedef struct { typedef wx_source_mgr * wx_src_ptr; +extern "C" +{ + CPP_METHODDEF(void) wx_init_source ( j_decompress_ptr WXUNUSED(cinfo) ) { } -CPP_METHODDEF(boolean) wx_fill_input_buffer ( j_decompress_ptr cinfo ) +CPP_METHODDEF(wxjpeg_boolean) wx_fill_input_buffer ( j_decompress_ptr cinfo ) { wx_src_ptr src = (wx_src_ptr) cinfo->src; @@ -148,14 +149,11 @@ CPP_METHODDEF(void) wx_term_source ( j_decompress_ptr cinfo ) // JPEG error manager: -struct wx_error_mgr { - struct jpeg_error_mgr pub; /* "public" fields */ - +struct wx_error_mgr : public jpeg_error_mgr +{ jmp_buf setjmp_buffer; /* for return to caller */ }; -typedef struct wx_error_mgr * wx_error_ptr; - /* * Here's the routine that will replace the standard error_exit method: */ @@ -163,14 +161,24 @@ typedef struct wx_error_mgr * wx_error_ptr; CPP_METHODDEF(void) wx_error_exit (j_common_ptr cinfo) { /* cinfo->err really points to a wx_error_mgr struct, so coerce pointer */ - wx_error_ptr myerr = (wx_error_ptr) cinfo->err; + wx_error_mgr * const jerr = (wx_error_mgr *) cinfo->err; /* Always display the message. */ /* We could postpone this until after returning, if we chose. */ - if (cinfo->err->output_message) (*cinfo->err->output_message) (cinfo); + (*cinfo->err->output_message) (cinfo); /* Return control to the setjmp point */ - longjmp(myerr->setjmp_buffer, 1); + longjmp(jerr->setjmp_buffer, 1); +} + +/* + * This will replace the standard output_message method when the user + * wants us to be silent (verbose==false). We must have such method instead of + * simply using NULL for cinfo->err->output_message because it's called + * unconditionally from within libjpeg when there's "garbage input". + */ +CPP_METHODDEF(void) wx_ignore_message (j_common_ptr WXUNUSED(cinfo)) +{ } void wx_jpeg_io_src( j_decompress_ptr cinfo, wxInputStream& infile ) @@ -195,6 +203,23 @@ void wx_jpeg_io_src( j_decompress_ptr cinfo, wxInputStream& infile ) src->pub.term_source = wx_term_source; } +} // extern "C" + +static inline void wx_cmyk_to_rgb(unsigned char* rgb, const unsigned char* cmyk) +{ + register int k = 255 - cmyk[3]; + register int k2 = cmyk[3]; + register int c; + + c = k + k2 * (255 - cmyk[0]) / 255; + rgb[0] = (unsigned char)((c > 255) ? 0 : (255 - c)); + + c = k + k2 * (255 - cmyk[1]) / 255; + rgb[1] = (unsigned char)((c > 255) ? 0 : (255 - c)); + + c = k + k2 * (255 - cmyk[2]) / 255; + rgb[2] = (unsigned char)((c > 255) ? 0 : (255 - c)); +} // temporarily disable the warning C4611 (interaction between '_setjmp' and // C++ object destruction is non-portable) - I don't see any dtors here @@ -204,17 +229,22 @@ void wx_jpeg_io_src( j_decompress_ptr cinfo, wxInputStream& infile ) bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) ) { + wxCHECK_MSG( image, false, "NULL image pointer" ); + struct jpeg_decompress_struct cinfo; - struct wx_error_mgr jerr; - JSAMPARRAY tempbuf; + wx_error_mgr jerr; unsigned char *ptr; - unsigned stride; + // save this before calling Destroy() + const unsigned maxWidth = image->GetOptionInt(wxIMAGE_OPTION_MAX_WIDTH), + maxHeight = image->GetOptionInt(wxIMAGE_OPTION_MAX_HEIGHT); image->Destroy(); - cinfo.err = jpeg_std_error( &jerr.pub ); - jerr.pub.error_exit = wx_error_exit; - if (!verbose) cinfo.err->output_message=NULL; + cinfo.err = jpeg_std_error( &jerr ); + jerr.error_exit = wx_error_exit; + + if (!verbose) + cinfo.err->output_message = wx_ignore_message; /* Establish the setjmp return context for wx_error_exit to use. */ if (setjmp(jerr.setjmp_buffer)) { @@ -222,36 +252,95 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos * We need to clean up the JPEG object, close the input file, and return. */ if (verbose) + { wxLogError(_("JPEG: Couldn't load - file is probably corrupted.")); + } (cinfo.src->term_source)(&cinfo); jpeg_destroy_decompress(&cinfo); - if (image->Ok()) image->Destroy(); + if (image->IsOk()) image->Destroy(); return false; } jpeg_create_decompress( &cinfo ); wx_jpeg_io_src( &cinfo, stream ); jpeg_read_header( &cinfo, TRUE ); - cinfo.out_color_space = JCS_RGB; + + int bytesPerPixel; + if ((cinfo.out_color_space == JCS_CMYK) || (cinfo.out_color_space == JCS_YCCK)) + { + cinfo.out_color_space = JCS_CMYK; + bytesPerPixel = 4; + } + else // all the rest is treated as RGB + { + cinfo.out_color_space = JCS_RGB; + bytesPerPixel = 3; + } + + // scale the picture to fit in the specified max size if necessary + if ( maxWidth > 0 || maxHeight > 0 ) + { + unsigned& scale = cinfo.scale_denom; + while ( (maxWidth && (cinfo.image_width / scale > maxWidth)) || + (maxHeight && (cinfo.image_height / scale > maxHeight)) ) + { + scale *= 2; + } + } + jpeg_start_decompress( &cinfo ); - image->Create( cinfo.image_width, cinfo.image_height ); - if (!image->Ok()) { + image->Create( cinfo.output_width, cinfo.output_height ); + if (!image->IsOk()) { jpeg_finish_decompress( &cinfo ); jpeg_destroy_decompress( &cinfo ); return false; } image->SetMask( false ); ptr = image->GetData(); - stride = cinfo.output_width * 3; - tempbuf = (*cinfo.mem->alloc_sarray) - ((j_common_ptr) &cinfo, JPOOL_IMAGE, stride, 1 ); - while ( cinfo.output_scanline < cinfo.output_height ) { + unsigned stride = cinfo.output_width * bytesPerPixel; + JSAMPARRAY tempbuf = (*cinfo.mem->alloc_sarray) + ((j_common_ptr) &cinfo, JPOOL_IMAGE, stride, 1 ); + + while ( cinfo.output_scanline < cinfo.output_height ) + { jpeg_read_scanlines( &cinfo, tempbuf, 1 ); - memcpy( ptr, tempbuf[0], stride ); - ptr += stride; + if (cinfo.out_color_space == JCS_RGB) + { + memcpy( ptr, tempbuf[0], stride ); + ptr += stride; + } + else // CMYK + { + const unsigned char* inptr = (const unsigned char*) tempbuf[0]; + for (size_t i = 0; i < cinfo.output_width; i++) + { + wx_cmyk_to_rgb(ptr, inptr); + ptr += 3; + inptr += 4; + } + } } + + // set up resolution if available: it's part of optional JFIF APP0 chunk + if ( cinfo.saw_JFIF_marker ) + { + image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, cinfo.X_density); + image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, cinfo.Y_density); + + // we use the same values for this option as libjpeg so we don't need + // any conversion here + image->SetOption(wxIMAGE_OPTION_RESOLUTIONUNIT, cinfo.density_unit); + } + + if ( cinfo.image_width != cinfo.output_width || cinfo.image_height != cinfo.output_height ) + { + // save the original image size + image->SetOption(wxIMAGE_OPTION_ORIGINAL_WIDTH, cinfo.image_width); + image->SetOption(wxIMAGE_OPTION_ORIGINAL_HEIGHT, cinfo.image_height); + } + jpeg_finish_decompress( &cinfo ); jpeg_destroy_decompress( &cinfo ); return true; @@ -268,6 +357,9 @@ typedef wx_destination_mgr * wx_dest_ptr; #define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */ +extern "C" +{ + CPP_METHODDEF(void) wx_init_destination (j_compress_ptr cinfo) { wx_dest_ptr dest = (wx_dest_ptr) cinfo->dest; @@ -280,7 +372,7 @@ CPP_METHODDEF(void) wx_init_destination (j_compress_ptr cinfo) dest->pub.free_in_buffer = OUTPUT_BUF_SIZE; } -CPP_METHODDEF(boolean) wx_empty_output_buffer (j_compress_ptr cinfo) +CPP_METHODDEF(wxjpeg_boolean) wx_empty_output_buffer (j_compress_ptr cinfo) { wx_dest_ptr dest = (wx_dest_ptr) cinfo->dest; @@ -316,18 +408,21 @@ GLOBAL(void) wx_jpeg_io_dest (j_compress_ptr cinfo, wxOutputStream& outfile) dest->stream = &outfile; } +} // extern "C" + bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose ) { struct jpeg_compress_struct cinfo; - struct wx_error_mgr jerr; + wx_error_mgr jerr; JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */ JSAMPLE *image_buffer; int stride; /* physical row width in image buffer */ - cinfo.err = jpeg_std_error(&jerr.pub); - jerr.pub.error_exit = wx_error_exit; + cinfo.err = jpeg_std_error(&jerr); + jerr.error_exit = wx_error_exit; - if (!verbose) cinfo.err->output_message=NULL; + if (!verbose) + cinfo.err->output_message = wx_ignore_message; /* Establish the setjmp return context for wx_error_exit to use. */ if (setjmp(jerr.setjmp_buffer)) @@ -336,7 +431,9 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo * We need to clean up the JPEG object, close the input file, and return. */ if (verbose) + { wxLogError(_("JPEG: Couldn't save image.")); + } jpeg_destroy_compress(&cinfo); return false; } @@ -356,41 +453,20 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo // 'Quality' is a number between 0 (terrible) and 100 (very good). // The default (in jcparam.c, jpeg_set_defaults) is 75, // and force_baseline is TRUE. - if (image->HasOption(wxT("quality"))) - jpeg_set_quality(&cinfo, image->GetOptionInt(wxT("quality")), TRUE); + if (image->HasOption(wxIMAGE_OPTION_QUALITY)) + jpeg_set_quality(&cinfo, image->GetOptionInt(wxIMAGE_OPTION_QUALITY), TRUE); // set the resolution fields in the output file - UINT16 resX, - resY; - if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONX) && - image->HasOption(wxIMAGE_OPTION_RESOLUTIONY) ) - { - resX = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); - resY = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); - } - else if ( image->HasOption(wxIMAGE_OPTION_RESOLUTION) ) - { - resX = - resY = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTION); - } - else - { - resX = - resY = 0; - } - - if ( resX && resY ) + int resX, resY; + wxImageResolution res = GetResolutionFromOptions(*image, &resX, &resY); + if ( res != wxIMAGE_RESOLUTION_NONE ) { cinfo.X_density = resX; cinfo.Y_density = resY; - } - // sets the resolution unit field in the output file - // wxIMAGE_RESOLUTION_INCHES for inches - // wxIMAGE_RESOLUTION_CM for centimeters - if ( image->HasOption(wxIMAGE_OPTION_RESOLUTIONUNIT) ) - { - cinfo.density_unit = (UINT8)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); + // it so happens that wxIMAGE_RESOLUTION_INCHES/CM values are the same + // ones as used by libjpeg, so we can assign them directly + cinfo.density_unit = res; } jpeg_start_compress(&cinfo, TRUE); @@ -415,7 +491,7 @@ bool wxJPEGHandler::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; return hdr[0] == 0xFF && hdr[1] == 0xD8; @@ -423,10 +499,9 @@ bool wxJPEGHandler::DoCanRead( wxInputStream& stream ) #endif // wxUSE_STREAMS -#endif // wxUSE_LIBJPEG - - - - - +/*static*/ wxVersionInfo wxJPEGHandler::GetLibraryVersionInfo() +{ + return wxVersionInfo("libjpeg", JPEG_LIB_VERSION/10, JPEG_LIB_VERSION%10); +} +#endif // wxUSE_LIBJPEG