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get byteswap working again

This commit is contained in:
John Cupitt 2011-12-01 14:52:49 +00:00
parent 9154e03715
commit 48763493e5
5 changed files with 53 additions and 91 deletions
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14
TODO
View File

@ -1,19 +1,5 @@
- try
edvips -n big x.v
header x.v
vips_image_build: byteswapping vips read
vips warning: VipsImage: unable to read data for "x.v", file has been
truncated
sanity failure: VipsImage (0x1764170) bad enum
- test vips_foreign_load_vips_get_flags(), sense inverted?
we have various printf()s left in the byteswap codepath
test load/save jpeg buffer
leaktest

4
libvips/iofuncs/header.c
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@ -538,6 +538,10 @@ vips_image_copy_fields_array( VipsImage *out, VipsImage *in[] )
g_assert( in[0] );
/* Copy magic too, handy for knowing the original image's byte order.
*/
out->magic = in[0]->magic;
out->Xsize = in[0]->Xsize;
out->Ysize = in[0]->Ysize;
out->Bands = in[0]->Bands;

16
libvips/iofuncs/image.c
View File

@ -405,12 +405,11 @@ vips_image_sanity( VipsObject *object, VipsBuf *buf )
if( !image->filename )
vips_buf_appends( buf, "NULL filename\n" );
/* All -1 means im has been inited but never used.
/* All 0 means im has been inited but never used.
*/
if( image->Xsize != -1 ||
image->Ysize != -1 ||
image->Bands != -1 ||
image->BandFmt != -1 ) {
if( image->Xsize != 0 ||
image->Ysize != 0 ||
image->Bands != 0 ) {
if( image->Xsize <= 0 ||
image->Ysize <= 0 ||
image->Bands <= 0 )
@ -602,9 +601,6 @@ vips_image_build( VipsObject *object )
VipsImage *t;
VipsImage *t2;
printf( "vips_image_build: "
"byteswapping vips read\n" );
/* Open the image in t, then byteswap to this
* image.
*/
@ -1597,8 +1593,8 @@ int
vips_image_write( VipsImage *image, VipsImage *out )
{
if( vips_image_pio_input( image ) ||
vips_image_pio_output( out ) )
if( vips_image_copy_fields( out, image ) )
vips_image_pio_output( out ) ||
vips_image_copy_fields( out, image ) )
return( -1 );
vips_demand_hint( out,
VIPS_DEMAND_STYLE_THINSTRIP, image, NULL );

106
libvips/iofuncs/vips.c
View File

@ -170,54 +170,34 @@ image_pixel_length( VipsImage *image )
return( psize + image->sizeof_header );
}
/* Read short/int/float LSB and MSB first.
/* Copy 2 and 4 bytes, swapping to and from native.
*/
void
vips__read_4byte( int msb_first, unsigned char *to, unsigned char **from )
vips__copy_4byte( int msb_first, unsigned char *to, unsigned char *from )
{
unsigned char *p = *from;
int out;
guint32 out;
if( msb_first )
out = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
out = from[0] << 24 | from[1] << 16 | from[2] << 8 | from[3];
else
out = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
out = from[3] << 24 | from[2] << 16 | from[1] << 8 | from[0];
*from += 4;
*((guint32 *) to) = out;
}
void
vips__read_2byte( int msb_first, unsigned char *to, unsigned char **from )
vips__copy_2byte( int msb_first, unsigned char *to, unsigned char *from )
{
int out;
unsigned char *p = *from;
guint16 out;
if( msb_first )
out = p[0] << 8 | p[1];
out = from[0] << 8 | from[1];
else
out = p[1] << 8 | p[0];
out = from[1] << 8 | from[0];
*from += 2;
*((guint16 *) to) = out;
}
/* We always write in native byte order.
*/
void
vips__write_4byte( unsigned char **to, unsigned char *from )
{
*((guint32 *) *to) = *((guint32 *) from);
*to += 4;
}
void
vips__write_2byte( unsigned char **to, unsigned char *from )
{
*((guint16 *) *to) = *((guint16 *) from);
*to += 2;
}
guint32
vips__file_magic( const char *filename )
{
@ -235,39 +215,25 @@ vips__file_magic( const char *filename )
*/
typedef struct _FieldIO {
glong offset;
void (*read)( int msb_first, unsigned char *to, unsigned char **from );
void (*write)( unsigned char **to, unsigned char *from );
int size;
void (*copy)( int msb_first, unsigned char *to, unsigned char *from );
} FieldIO;
static FieldIO fields[] = {
{ G_STRUCT_OFFSET( VipsImage, Xsize ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Ysize ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Bands ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Bbits ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, BandFmt ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Coding ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Type ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Xres ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Yres ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Length ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Compression ),
vips__read_2byte, vips__write_2byte },
{ G_STRUCT_OFFSET( VipsImage, Level ),
vips__read_2byte, vips__write_2byte },
{ G_STRUCT_OFFSET( VipsImage, Xoffset ),
vips__read_4byte, vips__write_4byte },
{ G_STRUCT_OFFSET( VipsImage, Yoffset ),
vips__read_4byte, vips__write_4byte }
{ G_STRUCT_OFFSET( VipsImage, Xsize ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Ysize ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Bands ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Bbits ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, BandFmt ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Coding ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Type ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Xres ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Yres ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Length ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Compression ), 2, vips__copy_2byte },
{ G_STRUCT_OFFSET( VipsImage, Level ), 2, vips__copy_2byte },
{ G_STRUCT_OFFSET( VipsImage, Xoffset ), 4, vips__copy_4byte },
{ G_STRUCT_OFFSET( VipsImage, Yoffset ), 4, vips__copy_4byte }
};
int
@ -276,19 +242,23 @@ vips__read_header_bytes( VipsImage *im, unsigned char *from )
int msb_first;
int i;
vips__read_4byte( 1, (unsigned char *) &im->magic, &from );
vips__copy_4byte( 1, (unsigned char *) &im->magic, from );
from += 4;
if( im->magic != VIPS_MAGIC_INTEL &&
im->magic != VIPS_MAGIC_SPARC ) {
vips_error( "VipsImage", _( "\"%s\" is not a VIPS image" ),
im->filename );
return( -1 );
}
msb_first = im->magic == VIPS_MAGIC_SPARC;
for( i = 0; i < VIPS_NUMBER( fields ); i++ )
fields[i].read( msb_first,
for( i = 0; i < VIPS_NUMBER( fields ); i++ ) {
fields[i].copy( msb_first,
&G_STRUCT_MEMBER( unsigned char, im, fields[i].offset ),
&from );
from );
from += fields[i].size;
}
/* Set this ourselves ... bbits is deprecated in the file format.
*/
@ -300,6 +270,7 @@ vips__read_header_bytes( VipsImage *im, unsigned char *from )
int
vips__write_header_bytes( VipsImage *im, unsigned char *to )
{
int msb_first;
int i;
unsigned char *q;
@ -311,10 +282,15 @@ vips__write_header_bytes( VipsImage *im, unsigned char *to )
to[3] = im->magic;
q = to + 4;
for( i = 0; i < VIPS_NUMBER( fields ); i++ )
fields[i].write( &q,
msb_first = im->magic == VIPS_MAGIC_SPARC;
for( i = 0; i < VIPS_NUMBER( fields ); i++ ) {
fields[i].copy( msb_first,
q,
&G_STRUCT_MEMBER( unsigned char, im,
fields[i].offset ) );
q += fields[i].size;
}
/* Pad spares with zeros.
*/

4
tools/header.c
View File

@ -160,9 +160,9 @@ print_header( IMAGE *im, gboolean many )
vips_image_get_interpretation( im ) ) );
if( im->magic == VIPS_MAGIC_SPARC )
printf( ", SPARC" );
printf( ", sparc" );
else if( im->magic == VIPS_MAGIC_INTEL )
printf( ", INTEL" );
printf( ", intel" );
printf( "\n" );