Committing in .

[wxWidgets.git] / src / common / imagjpeg.cpp

diff --git a/src/common/imagjpeg.cpp b/src/common/imagjpeg.cpp
index 0b89c5c3ec2c0234718d03163cf2c606f1e5c21b..a4fc184bedbbf8fe39878d607b307b9f00aa5abf 100644 (file)
--- a/src/common/imagjpeg.cpp
+++ b/src/common/imagjpeg.cpp
@@ -28,8 +28,9 @@
 #include "wx/debug.h"
 #include "wx/log.h"
 #include "wx/app.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"
 }
 #include "wx/filefn.h"
 #include "wx/wfstream.h"


@@ -65,7 +66,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxJPEGHandler,wxImageHandler)
 
 typedef struct {
     struct jpeg_source_mgr pub;   /* public fields */
 
 typedef struct {
     struct jpeg_source_mgr pub;   /* public fields */

-    
+

     JOCTET* buffer;               /* start of buffer */
 } my_source_mgr;
 
     JOCTET* buffer;               /* start of buffer */
 } my_source_mgr;
 


@@ -83,7 +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;
 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;
 }
     src->pub.next_input_byte += (size_t) num_bytes;
     src->pub.bytes_in_buffer -= (size_t) num_bytes;
 }


@@ -91,15 +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;
 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;
     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));
         cinfo->src = (struct jpeg_source_mgr *)
             (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
             sizeof(my_source_mgr));


@@ -110,7 +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->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;
     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;


@@ -122,9 +123,9 @@ void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile )
 // JPEG error manager:
 
 struct my_error_mgr {
 // 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;
 };
 
 typedef struct my_error_mgr * my_error_ptr;


@@ -156,7 +157,7 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos
     JSAMPARRAY tempbuf;
     unsigned char *ptr;
     unsigned stride;
     JSAMPARRAY tempbuf;
     unsigned char *ptr;
     unsigned stride;

-    
+

     image->Destroy();
     cinfo.err = jpeg_std_error( &jerr.pub );
     jerr.pub.error_exit = my_error_exit;
     image->Destroy();
     cinfo.err = jpeg_std_error( &jerr.pub );
     jerr.pub.error_exit = my_error_exit;


@@ -179,7 +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 );
     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 );
     image->Create( cinfo.image_width, cinfo.image_height );
     if (!image->Ok()) {
         jpeg_finish_decompress( &cinfo );


@@ -191,7 +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 );
     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 );
     while ( cinfo.output_scanline < cinfo.output_height ) {
         jpeg_read_scanlines( &cinfo, tempbuf, 1 );
         memcpy( ptr, tempbuf[0], stride );


@@ -208,19 +209,19 @@ bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbos
 
 typedef struct {
     struct jpeg_destination_mgr pub;
 
 typedef struct {
     struct jpeg_destination_mgr pub;

-    
+

     wxOutputStream *stream;
     JOCTET * buffer;
 } my_destination_mgr;
 
 typedef my_destination_mgr * my_dest_ptr;
 
     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;
 
 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,
     /* 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,


@@ -232,7 +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;
 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;
     dest->stream->Write(dest->buffer, OUTPUT_BUF_SIZE);
     dest->pub.next_output_byte = dest->buffer;
     dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;


@@ -251,13 +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;
 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));
     }
         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;
     dest = (my_dest_ptr) cinfo->dest;
     dest->pub.init_destination = init_destination;
     dest->pub.empty_output_buffer = empty_output_buffer;


@@ -269,10 +270,10 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
 {
     struct jpeg_compress_struct cinfo;
     struct my_error_mgr jerr;
 {
     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;
     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;
 
     cinfo.err = jpeg_std_error(&jerr.pub);
     jerr.pub.error_exit = my_error_exit;
 


@@ -290,15 +291,15 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
 
     jpeg_create_compress(&cinfo);
     jpeg_wxio_dest(&cinfo, stream);
 
     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);
     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];
     image_buffer = image->GetData();
     while (cinfo.next_scanline < cinfo.image_height) {
         row_pointer[0] = &image_buffer[cinfo.next_scanline * stride];


@@ -306,15 +307,23 @@ bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbo
     }
     jpeg_finish_compress(&cinfo);
     jpeg_destroy_compress(&cinfo);
     }
     jpeg_finish_compress(&cinfo);
     jpeg_destroy_compress(&cinfo);

-    
+

     return TRUE;
 }
 
     return TRUE;
 }
 

-#endif 
-  // wxUSE_STREAMS

 
 

-#endif 
-  // wxUSE_LIBJPEG
+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
+
+#endif   // wxUSE_LIBJPEG