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start adding sequential jpeg support

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This commit is contained in:
John Cupitt 2012-02-17 18:08:58 +00:00
parent 3dcd3729a0
commit 77ab09d451
1 changed files with 23 additions and 0 deletions
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23
libvips/foreign/jpegload.c
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@ -97,6 +97,15 @@ typedef VipsForeignLoadClass VipsForeignLoadJpegClass;
G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadJpeg, vips_foreign_load_jpeg,
VIPS_TYPE_FOREIGN_LOAD );
static VipsForeignFlags
vips_foreign_load_jpeg_get_flags( VipsForeignLoad *load )
{
/* The jpeg reader supports sequential read.
*/
//return( VIPS_FOREIGN_SEQUENTIAL );
return( 0 );
}
static int
vips_foreign_load_jpeg_build( VipsObject *object )
{
@ -123,6 +132,7 @@ vips_foreign_load_jpeg_class_init( VipsForeignLoadJpegClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
@ -131,6 +141,8 @@ vips_foreign_load_jpeg_class_init( VipsForeignLoadJpegClass *class )
object_class->description = _( "load jpeg" );
object_class->build = vips_foreign_load_jpeg_build;
load_class->get_flags = vips_foreign_load_jpeg_get_flags;
VIPS_ARG_INT( class, "shrink", 10,
_( "Shrink" ),
_( "Shrink factor on load" ),
@ -166,6 +178,15 @@ typedef VipsForeignLoadJpegClass VipsForeignLoadJpegFileClass;
G_DEFINE_TYPE( VipsForeignLoadJpegFile, vips_foreign_load_jpeg_file,
vips_foreign_load_jpeg_get_type() );
static VipsForeignFlags
vips_foreign_load_jpeg_file_get_flags_filename( const char *filename )
{
/* The jpeg reader supports sequential read.
*/
//return( VIPS_FOREIGN_SEQUENTIAL );
return( 0 );
}
static gboolean
vips_foreign_load_jpeg_file_is_a( const char *filename )
{
@ -216,6 +237,8 @@ vips_foreign_load_jpeg_file_class_init( VipsForeignLoadJpegFileClass *class )
foreign_class->suffs = jpeg_suffs;
load_class->get_flags_filename =
vips_foreign_load_jpeg_file_get_flags_filename;
load_class->is_a = vips_foreign_load_jpeg_file_is_a;
load_class->header = vips_foreign_load_jpeg_file_header;
load_class->load = vips_foreign_load_jpeg_file_load;