X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/88a7a4e10ed18f81a576dcd866cfbf02bf404c00..3cb6eaec797ebbe20a0e05e5c9ba625909845e72:/src/common/imagjpeg.cpp diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp index 790dc68121..d045596065 100644 --- a/src/common/imagjpeg.cpp +++ b/src/common/imagjpeg.cpp @@ -22,19 +22,19 @@ #include "wx/log.h" #include "wx/app.h" #include "wx/intl.h" + #include "wx/bitmap.h" + #include "wx/module.h" #endif -#include "wx/bitmap.h" -#include "wx/debug.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__)) +// 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" @@ -45,9 +45,12 @@ extern "C" #include "jpeglib.h" } +#ifndef HAVE_WXJPEG_BOOLEAN +typedef boolean wxjpeg_boolean; +#endif + #include "wx/filefn.h" #include "wx/wfstream.h" -#include "wx/module.h" // For memcpy #include @@ -97,11 +100,14 @@ 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; @@ -203,6 +209,23 @@ 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 @@ -214,9 +237,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos { struct jpeg_decompress_struct cinfo; struct wx_error_mgr jerr; - JSAMPARRAY tempbuf; unsigned char *ptr; - unsigned stride; image->Destroy(); cinfo.err = jpeg_std_error( &jerr.pub ); @@ -241,7 +262,19 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos 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; + } + jpeg_start_decompress( &cinfo ); image->Create( cinfo.image_width, cinfo.image_height ); @@ -252,15 +285,42 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos } 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); + } + jpeg_finish_decompress( &cinfo ); jpeg_destroy_decompress( &cinfo ); return true; @@ -277,6 +337,9 @@ 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; @@ -289,7 +352,7 @@ 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; @@ -325,6 +388,8 @@ 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; @@ -370,37 +435,16 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo 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 = (UINT16)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); - resY = (UINT16)image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); - } - else if ( image->HasOption(wxIMAGE_OPTION_RESOLUTION) ) - { - resX = - resY = (UINT16)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);