X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b9b32d5c4fd7156164b7c264d0f88dfe264851ba..6842d18650b487249b4ae29d0d7e17231b24cde8:/src/common/imagjpeg.cpp diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp index 890985f957..a4fc184bed 100644 --- a/src/common/imagjpeg.cpp +++ b/src/common/imagjpeg.cpp @@ -21,15 +21,16 @@ #include "wx/defs.h" -#if wxUSE_STREAMS && wxUSE_LIBJPEG +#if wxUSE_LIBJPEG #include "wx/image.h" #include "wx/bitmap.h" #include "wx/debug.h" #include "wx/log.h" #include "wx/app.h" -extern "C" { -#include "jpeglib.h" +extern "C" +{ + #include "jpeglib.h" } #include "wx/filefn.h" #include "wx/wfstream.h" @@ -59,11 +60,13 @@ extern "C" { IMPLEMENT_DYNAMIC_CLASS(wxJPEGHandler,wxImageHandler) #endif +#if wxUSE_STREAMS + //------------- JPEG Data Source Manager typedef struct { struct jpeg_source_mgr pub; /* public fields */ - + JOCTET* buffer; /* start of buffer */ } my_source_mgr; @@ -81,7 +84,7 @@ METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr WXUNUSED(cinfo) ) METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes ) { my_src_ptr src = (my_src_ptr) cinfo->src; - + src->pub.next_input_byte += (size_t) num_bytes; src->pub.bytes_in_buffer -= (size_t) num_bytes; } @@ -89,15 +92,15 @@ METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes ) METHODDEF(void) my_term_source ( j_decompress_ptr cinfo ) { my_src_ptr src = (my_src_ptr) cinfo->src; - + free (src->buffer); } void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile ) { my_src_ptr src; - - if (cinfo->src == NULL) { /* first time for this JPEG object? */ + + 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)); @@ -108,7 +111,7 @@ void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile ) src->buffer = (JOCTET *) malloc (infile.GetSize()); src->pub.next_input_byte = src->buffer; /* until buffer loaded */ infile.Read(src->buffer, infile.GetSize()); - + 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; @@ -120,9 +123,9 @@ void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile ) // JPEG error manager: struct my_error_mgr { - struct jpeg_error_mgr pub; /* "public" fields */ + struct jpeg_error_mgr pub; /* "public" fields */ - jmp_buf setjmp_buffer; /* for return to caller */ + jmp_buf setjmp_buffer; /* for return to caller */ }; typedef struct my_error_mgr * my_error_ptr; @@ -154,7 +157,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos JSAMPARRAY tempbuf; unsigned char *ptr; unsigned stride; - + image->Destroy(); cinfo.err = jpeg_std_error( &jerr.pub ); jerr.pub.error_exit = my_error_exit; @@ -177,7 +180,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos jpeg_read_header( &cinfo, TRUE ); cinfo.out_color_space = JCS_RGB; jpeg_start_decompress( &cinfo ); - + image->Create( cinfo.image_width, cinfo.image_height ); if (!image->Ok()) { jpeg_finish_decompress( &cinfo ); @@ -189,7 +192,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos 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 ) { jpeg_read_scanlines( &cinfo, tempbuf, 1 ); memcpy( ptr, tempbuf[0], stride ); @@ -206,19 +209,19 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos typedef struct { struct jpeg_destination_mgr pub; - + wxOutputStream *stream; JOCTET * buffer; } my_destination_mgr; typedef my_destination_mgr * my_dest_ptr; -#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */ +#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */ METHODDEF(void) init_destination (j_compress_ptr cinfo) { my_dest_ptr dest = (my_dest_ptr) cinfo->dest; - + /* Allocate the output buffer --- it will be released when done with image */ dest->buffer = (JOCTET *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, @@ -230,7 +233,7 @@ METHODDEF(void) init_destination (j_compress_ptr cinfo) METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo) { my_dest_ptr dest = (my_dest_ptr) cinfo->dest; - + dest->stream->Write(dest->buffer, OUTPUT_BUF_SIZE); dest->pub.next_output_byte = dest->buffer; dest->pub.free_in_buffer = OUTPUT_BUF_SIZE; @@ -249,13 +252,13 @@ METHODDEF(void) term_destination (j_compress_ptr cinfo) GLOBAL(void) jpeg_wxio_dest (j_compress_ptr cinfo, wxOutputStream& outfile) { my_dest_ptr dest; - - if (cinfo->dest == NULL) { /* first time for this JPEG object? */ + + 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)); } - + dest = (my_dest_ptr) cinfo->dest; dest->pub.init_destination = init_destination; dest->pub.empty_output_buffer = empty_output_buffer; @@ -267,10 +270,10 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo { struct jpeg_compress_struct cinfo; struct my_error_mgr jerr; - JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */ + JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */ JSAMPLE *image_buffer; - int stride; /* physical row width in image buffer */ - + int stride; /* physical row width in image buffer */ + cinfo.err = jpeg_std_error(&jerr.pub); jerr.pub.error_exit = my_error_exit; @@ -288,15 +291,15 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo jpeg_create_compress(&cinfo); jpeg_wxio_dest(&cinfo, stream); - + cinfo.image_width = image->GetWidth(); cinfo.image_height = image->GetHeight(); cinfo.input_components = 3; cinfo.in_color_space = JCS_RGB; jpeg_set_defaults(&cinfo); jpeg_start_compress(&cinfo, TRUE); - - stride = cinfo.image_width * 3; /* JSAMPLEs per row in image_buffer */ + + stride = cinfo.image_width * 3; /* JSAMPLEs per row in image_buffer */ image_buffer = image->GetData(); while (cinfo.next_scanline < cinfo.image_height) { row_pointer[0] = &image_buffer[cinfo.next_scanline * stride]; @@ -304,21 +307,23 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo } jpeg_finish_compress(&cinfo); jpeg_destroy_compress(&cinfo); - + return TRUE; } -bool wxJPEGHandler::CanRead( wxInputStream& stream ) +bool wxJPEGHandler::DoCanRead( wxInputStream& stream ) { unsigned char hdr[2]; - + stream.Read(&hdr, 2); stream.SeekI(-2, wxFromCurrent); return (hdr[0] == 0xFF && hdr[1] == 0xD8); } -#endif // wxUSE_STREAMS && wxUSE_LIBJPEG +#endif // wxUSE_STREAMS + +#endif // wxUSE_LIBJPEG