X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8af27d1dee477e3e52aa60d73b19d46f531374b7..73fe67bd60b57f95dc63809f7843ed2a15928436:/src/common/imagjpeg.cpp?ds=sidebyside diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp index c8db0ce961..5ecb9f6168 100644 --- a/src/common/imagjpeg.cpp +++ b/src/common/imagjpeg.cpp @@ -7,7 +7,7 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "imagjpeg.h" #endif @@ -28,17 +28,21 @@ #include "wx/log.h" #include "wx/app.h" -// NB: Some compilers define boolean type in Windows headers (e.g. Watcom C++). +// 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(__WATCOMC__)) +#if defined(__WXMSW__) && (defined(__MWERKS__) || defined(__DIGITALMARS__) || (defined(__WATCOMC__) && __WATCOMC__ < 1200)) #define HAVE_BOOLEAN - #include + #include "wx/msw/wrapwin.h" #endif extern "C" { + #if defined(__WXMSW__) + #define XMD_H + #endif #include "jpeglib.h" } @@ -53,15 +57,26 @@ extern "C" #include #ifdef __SALFORDC__ -#ifdef FAR #undef FAR #endif -#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 +// ---------------------------------------------------------------------------- +// 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 //----------------------------------------------------------------------------- // wxJPEGHandler @@ -80,17 +95,17 @@ typedef struct { JOCTET* buffer; /* start of buffer */ wxInputStream *stream; -} my_source_mgr; +} wx_source_mgr; -typedef my_source_mgr * my_src_ptr; +typedef wx_source_mgr * wx_src_ptr; -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(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); @@ -133,22 +148,22 @@ METHODDEF(void) my_term_source ( j_decompress_ptr cinfo ) // JPEG error manager: -struct my_error_mgr { +struct wx_error_mgr { struct jpeg_error_mgr pub; /* "public" fields */ jmp_buf setjmp_buffer; /* for return to caller */ }; -typedef struct my_error_mgr * my_error_ptr; +typedef struct wx_error_mgr * wx_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_ptr myerr = (wx_error_ptr) cinfo->err; /* Always display the message. */ /* We could postpone this until after returning, if we chose. */ @@ -158,27 +173,26 @@ METHODDEF(void) my_error_exit (j_common_ptr cinfo) longjmp(myerr->setjmp_buffer, 1); } -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; } @@ -191,18 +205,18 @@ void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile ) bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) ) { struct jpeg_decompress_struct cinfo; - struct my_error_mgr jerr; + struct wx_error_mgr jerr; JSAMPARRAY tempbuf; unsigned char *ptr; unsigned stride; image->Destroy(); cinfo.err = jpeg_std_error( &jerr.pub ); - jerr.pub.error_exit = my_error_exit; + jerr.pub.error_exit = wx_error_exit; if (!verbose) cinfo.err->output_message=NULL; - /* 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. * We need to clean up the JPEG object, close the input file, and return. @@ -216,7 +230,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos } 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; jpeg_start_decompress( &cinfo ); @@ -248,15 +262,15 @@ 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) +CPP_METHODDEF(void) wx_init_destination (j_compress_ptr cinfo) { - my_dest_ptr dest = (my_dest_ptr) cinfo->dest; + 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 +280,9 @@ 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(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 +290,46 @@ 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; } bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose ) { struct jpeg_compress_struct cinfo; - struct my_error_mgr jerr; + struct 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; + jerr.pub.error_exit = wx_error_exit; if (!verbose) cinfo.err->output_message=NULL; - /* 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. @@ -328,7 +342,7 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo } 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(); @@ -345,6 +359,21 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo if (image->HasOption(wxT("quality"))) jpeg_set_quality(&cinfo, image->GetOptionInt(wxT("quality")), TRUE); + // sets the resolution fields in the output file + if (image->HasOption(wxIMAGE_OPTION_RESOLUTION)) + { + cinfo.X_density = + cinfo.Y_density = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTION); + } + + // 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 = image->GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); + } + jpeg_start_compress(&cinfo, TRUE); stride = cinfo.image_width * 3; /* JSAMPLEs per row in image_buffer */ @@ -367,9 +396,10 @@ 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