X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8af27d1dee477e3e52aa60d73b19d46f531374b7..b53aea81d2e102224b452ef5bf7aee1132f37c6f:/src/common/imagjpeg.cpp diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp index c8db0ce961..f14027cb78 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: $Id$ @@ -7,62 +7,74 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#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++). -// 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(__WATCOMC__)) + +#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 + #define boolean wxHACK_BOOLEAN #endif extern "C" { + #if defined(__WXMSW__) + #define XMD_H + #endif #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__ -#ifdef FAR -#undef FAR -#endif +// ---------------------------------------------------------------------------- +// types +// ---------------------------------------------------------------------------- + +// the standard definition of METHODDEF(type) from jmorecfg.h is "static type" +// which means that we can't declare the method functions as extern "C" - the +// compiler (rightfully) complains about the multiple storage classes in +// declaration +// +// so we only add extern "C" when using our own, modified, jmorecfg.h - and use +// whatever we have in the system headers if this is what we use hoping that it +// should be ok (can't do anything else) +#ifdef JPEG_METHOD_LINKAGE + #define CPP_METHODDEF(type) extern "C" METHODDEF(type) +#else // not using our jmorecfg.h header + #define CPP_METHODDEF(type) METHODDEF(type) #endif -// we can't use METHODDEF here as it includes static yet the functions must be -// extern "C" and these can't be used together! -#undef METHODDEF -#define METHODDEF(type) extern "C" type wxC_CALLING_CONV - //----------------------------------------------------------------------------- // wxJPEGHandler //----------------------------------------------------------------------------- @@ -80,17 +92,20 @@ typedef struct { JOCTET* buffer; /* start of buffer */ wxInputStream *stream; -} my_source_mgr; +} wx_source_mgr; + +typedef wx_source_mgr * wx_src_ptr; -typedef my_source_mgr * my_src_ptr; +extern "C" +{ -METHODDEF(void) my_init_source ( j_decompress_ptr WXUNUSED(cinfo) ) +CPP_METHODDEF(void) wx_init_source ( j_decompress_ptr WXUNUSED(cinfo) ) { } -METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr cinfo ) +CPP_METHODDEF(wxjpeg_boolean) wx_fill_input_buffer ( j_decompress_ptr cinfo ) { - my_src_ptr src = (my_src_ptr) cinfo->src; + wx_src_ptr src = (wx_src_ptr) cinfo->src; src->pub.next_input_byte = src->buffer; src->pub.bytes_in_buffer = src->stream->Read(src->buffer, JPEG_IO_BUFFER_SIZE).LastRead(); @@ -105,11 +120,11 @@ METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr cinfo ) return TRUE; } -METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes ) +CPP_METHODDEF(void) wx_skip_input_data ( j_decompress_ptr cinfo, long num_bytes ) { if (num_bytes > 0) { - my_src_ptr src = (my_src_ptr) cinfo->src; + wx_src_ptr src = (wx_src_ptr) cinfo->src; while (num_bytes > (long)src->pub.bytes_in_buffer) { @@ -121,9 +136,9 @@ METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes ) } } -METHODDEF(void) my_term_source ( j_decompress_ptr cinfo ) +CPP_METHODDEF(void) wx_term_source ( j_decompress_ptr cinfo ) { - my_src_ptr src = (my_src_ptr) cinfo->src; + wx_src_ptr src = (wx_src_ptr) cinfo->src; if (src->pub.bytes_in_buffer > 0) src->stream->SeekI(-(long)src->pub.bytes_in_buffer, wxFromCurrent); @@ -133,54 +148,77 @@ METHODDEF(void) my_term_source ( j_decompress_ptr cinfo ) // JPEG error manager: -struct my_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 my_error_mgr * my_error_ptr; - /* * Here's the routine that will replace the standard error_exit method: */ -METHODDEF(void) my_error_exit (j_common_ptr cinfo) +CPP_METHODDEF(void) wx_error_exit (j_common_ptr cinfo) { - /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ - my_error_ptr myerr = (my_error_ptr) cinfo->err; + /* cinfo->err really points to a wx_error_mgr struct, so coerce pointer */ + 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 jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile ) +void wx_jpeg_io_src( j_decompress_ptr cinfo, wxInputStream& infile ) { - my_src_ptr src; + wx_src_ptr src; if (cinfo->src == NULL) { /* first time for this JPEG object? */ cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, - sizeof(my_source_mgr)); - src = (my_src_ptr) cinfo->src; + sizeof(wx_source_mgr)); } - src = (my_src_ptr) cinfo->src; + src = (wx_src_ptr) cinfo->src; src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */ src->buffer = new JOCTET[JPEG_IO_BUFFER_SIZE]; src->pub.next_input_byte = NULL; /* until buffer loaded */ src->stream = &infile; - src->pub.init_source = my_init_source; - src->pub.fill_input_buffer = my_fill_input_buffer; - src->pub.skip_input_data = my_skip_input_data; + src->pub.init_source = wx_init_source; + src->pub.fill_input_buffer = wx_fill_input_buffer; + src->pub.skip_input_data = wx_skip_input_data; src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */ - src->pub.term_source = my_term_source; + 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 @@ -190,19 +228,24 @@ void jpeg_wxio_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 my_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 = my_error_exit; - if (!verbose) cinfo.err->output_message=NULL; + cinfo.err = jpeg_std_error( &jerr ); + jerr.error_exit = wx_error_exit; - /* Establish the setjmp return context for my_error_exit to use. */ + 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)) { /* If we get here, the JPEG code has signaled an error. * We need to clean up the JPEG object, close the input file, and return. @@ -212,35 +255,85 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos (cinfo.src->term_source)(&cinfo); jpeg_destroy_decompress(&cinfo); if (image->Ok()) image->Destroy(); - return FALSE; + return false; } jpeg_create_decompress( &cinfo ); - jpeg_wxio_src( &cinfo, stream ); + 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 ); + image->Create( cinfo.output_width, cinfo.output_height ); if (!image->Ok()) { jpeg_finish_decompress( &cinfo ); jpeg_destroy_decompress( &cinfo ); - return FALSE; + return false; } - image->SetMask( 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); } + jpeg_finish_decompress( &cinfo ); jpeg_destroy_decompress( &cinfo ); - return TRUE; + return true; } typedef struct { @@ -248,15 +341,18 @@ typedef struct { wxOutputStream *stream; JOCTET * buffer; -} my_destination_mgr; +} wx_destination_mgr; -typedef my_destination_mgr * my_dest_ptr; +typedef wx_destination_mgr * wx_dest_ptr; #define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */ -METHODDEF(void) init_destination (j_compress_ptr cinfo) +extern "C" { - my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + +CPP_METHODDEF(void) wx_init_destination (j_compress_ptr cinfo) +{ + wx_dest_ptr dest = (wx_dest_ptr) cinfo->dest; /* Allocate the output buffer --- it will be released when done with image */ dest->buffer = (JOCTET *) @@ -266,9 +362,9 @@ METHODDEF(void) init_destination (j_compress_ptr cinfo) dest->pub.free_in_buffer = OUTPUT_BUF_SIZE; } -METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo) +CPP_METHODDEF(wxjpeg_boolean) wx_empty_output_buffer (j_compress_ptr cinfo) { - my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + wx_dest_ptr dest = (wx_dest_ptr) cinfo->dest; dest->stream->Write(dest->buffer, OUTPUT_BUF_SIZE); dest->pub.next_output_byte = dest->buffer; @@ -276,46 +372,49 @@ METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo) return TRUE; } -METHODDEF(void) term_destination (j_compress_ptr cinfo) +CPP_METHODDEF(void) wx_term_destination (j_compress_ptr cinfo) { - my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + wx_dest_ptr dest = (wx_dest_ptr) cinfo->dest; size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer; /* Write any data remaining in the buffer */ if (datacount > 0) dest->stream->Write(dest->buffer, datacount); } -GLOBAL(void) jpeg_wxio_dest (j_compress_ptr cinfo, wxOutputStream& outfile) +GLOBAL(void) wx_jpeg_io_dest (j_compress_ptr cinfo, wxOutputStream& outfile) { - my_dest_ptr dest; + wx_dest_ptr dest; if (cinfo->dest == NULL) { /* first time for this JPEG object? */ cinfo->dest = (struct jpeg_destination_mgr *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, - sizeof(my_destination_mgr)); + sizeof(wx_destination_mgr)); } - dest = (my_dest_ptr) cinfo->dest; - dest->pub.init_destination = init_destination; - dest->pub.empty_output_buffer = empty_output_buffer; - dest->pub.term_destination = term_destination; + dest = (wx_dest_ptr) cinfo->dest; + dest->pub.init_destination = wx_init_destination; + dest->pub.empty_output_buffer = wx_empty_output_buffer; + dest->pub.term_destination = wx_term_destination; dest->stream = &outfile; } +} // extern "C" + bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose ) { struct jpeg_compress_struct cinfo; - struct my_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 = my_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 my_error_exit to use. */ + /* Establish the setjmp return context for wx_error_exit to use. */ if (setjmp(jerr.setjmp_buffer)) { /* If we get here, the JPEG code has signaled an error. @@ -324,11 +423,11 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo if (verbose) wxLogError(_("JPEG: Couldn't save image.")); jpeg_destroy_compress(&cinfo); - return FALSE; + return false; } jpeg_create_compress(&cinfo); - jpeg_wxio_dest(&cinfo, stream); + wx_jpeg_io_dest(&cinfo, stream); cinfo.image_width = image->GetWidth(); cinfo.image_height = image->GetHeight(); @@ -342,8 +441,21 @@ 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 + int resX, resY; + wxImageResolution res = GetResolutionFromOptions(*image, &resX, &resY); + if ( res != wxIMAGE_RESOLUTION_NONE ) + { + cinfo.X_density = resX; + cinfo.Y_density = resY; + + // 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); @@ -356,7 +468,7 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo jpeg_finish_compress(&cinfo); jpeg_destroy_compress(&cinfo); - return TRUE; + return true; } #ifdef __VISUALC__ @@ -367,17 +479,12 @@ bool wxJPEGHandler::DoCanRead( wxInputStream& stream ) { unsigned char hdr[2]; - stream.Read(hdr, 2); - stream.SeekI(-2, wxFromCurrent); - return (hdr[0] == 0xFF && hdr[1] == 0xD8); + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return false; + + return hdr[0] == 0xFF && hdr[1] == 0xD8; } #endif // wxUSE_STREAMS #endif // wxUSE_LIBJPEG - - - - - -