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Add is_a support to SVG file class loader

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This commit is contained in:
Lovell Fuller 2018-03-19 18:42:50 +00:00
parent c5bf128e39
commit 63cab9bc62
1 changed files with 86 additions and 76 deletions
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162
libvips/foreign/svgload.c
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@ -350,82 +350,6 @@ typedef VipsForeignLoadSvgClass VipsForeignLoadSvgFileClass;
G_DEFINE_TYPE( VipsForeignLoadSvgFile, vips_foreign_load_svg_file,
vips_foreign_load_svg_get_type() );
static int
vips_foreign_load_svg_file_header( VipsForeignLoad *load )
{
VipsForeignLoadSvg *svg = (VipsForeignLoadSvg *) load;
VipsForeignLoadSvgFile *file = (VipsForeignLoadSvgFile *) load;
GError *error = NULL;
if( !(svg->page = rsvg_handle_new_from_file(
file->filename, &error )) ) {
vips_g_error( &error );
return( -1 );
}
VIPS_SETSTR( load->out->filename, file->filename );
return( vips_foreign_load_svg_header( load ) );
}
static const char *vips_foreign_svg_suffs[] = {
".svg",
/* librsvg supports svgz directly, no need to check for zlib here.
*/
#if LIBRSVG_CHECK_FEATURE(SVGZ)
".svgz",
".svg.gz",
#endif
NULL
};
static void
vips_foreign_load_svg_file_class_init(
VipsForeignLoadSvgFileClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsForeignClass *foreign_class = (VipsForeignClass *) class;
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "svgload";
foreign_class->suffs = vips_foreign_svg_suffs;
load_class->header = vips_foreign_load_svg_file_header;
VIPS_ARG_STRING( class, "filename", 1,
_( "Filename" ),
_( "Filename to load from" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadSvgFile, filename ),
NULL );
}
static void
vips_foreign_load_svg_file_init( VipsForeignLoadSvgFile *file )
{
}
typedef struct _VipsForeignLoadSvgBuffer {
VipsForeignLoadSvg parent_object;
/* Load from a buffer.
*/
VipsArea *buf;
} VipsForeignLoadSvgBuffer;
typedef VipsForeignLoadSvgClass VipsForeignLoadSvgBufferClass;
G_DEFINE_TYPE( VipsForeignLoadSvgBuffer, vips_foreign_load_svg_buffer,
vips_foreign_load_svg_get_type() );
#ifdef HANDLE_SVGZ
static void *
vips_foreign_load_svg_zalloc( void *opaque, unsigned items, unsigned size )
@ -526,6 +450,92 @@ vips_foreign_load_svg_is_a_buffer( const void *buf, size_t len )
return( FALSE );
}
static gboolean
vips_foreign_load_svg_is_a( const char *filename )
{
unsigned char buf[300];
return( vips__get_bytes( filename, buf, 300 ) &&
vips_foreign_load_svg_is_a_buffer( buf, 300 ) );
}
static int
vips_foreign_load_svg_file_header( VipsForeignLoad *load )
{
VipsForeignLoadSvg *svg = (VipsForeignLoadSvg *) load;
VipsForeignLoadSvgFile *file = (VipsForeignLoadSvgFile *) load;
GError *error = NULL;
if( !(svg->page = rsvg_handle_new_from_file(
file->filename, &error )) ) {
vips_g_error( &error );
return( -1 );
}
VIPS_SETSTR( load->out->filename, file->filename );
return( vips_foreign_load_svg_header( load ) );
}
static const char *vips_foreign_svg_suffs[] = {
".svg",
/* librsvg supports svgz directly, no need to check for zlib here.
*/
#if LIBRSVG_CHECK_FEATURE(SVGZ)
".svgz",
".svg.gz",
#endif
NULL
};
static void
vips_foreign_load_svg_file_class_init(
VipsForeignLoadSvgFileClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsForeignClass *foreign_class = (VipsForeignClass *) class;
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "svgload";
foreign_class->suffs = vips_foreign_svg_suffs;
load_class->is_a = vips_foreign_load_svg_is_a;
load_class->header = vips_foreign_load_svg_file_header;
VIPS_ARG_STRING( class, "filename", 1,
_( "Filename" ),
_( "Filename to load from" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadSvgFile, filename ),
NULL );
}
static void
vips_foreign_load_svg_file_init( VipsForeignLoadSvgFile *file )
{
}
typedef struct _VipsForeignLoadSvgBuffer {
VipsForeignLoadSvg parent_object;
/* Load from a buffer.
*/
VipsArea *buf;
} VipsForeignLoadSvgBuffer;
typedef VipsForeignLoadSvgClass VipsForeignLoadSvgBufferClass;
G_DEFINE_TYPE( VipsForeignLoadSvgBuffer, vips_foreign_load_svg_buffer,
vips_foreign_load_svg_get_type() );
static int
vips_foreign_load_svg_buffer_header( VipsForeignLoad *load )
{