C++ (Cpp) VIPS_IMAGE_SIZEOF_IMAGE Examples

Example #1

File: webp2vips.c Project: gargsms/libvips

static int
read_image( Read *read, VipsImage *out )
{
	VipsImage **t = (VipsImage **) 
		vips_object_local_array( VIPS_OBJECT( out ), 3 );

	t[0] = vips_image_new_memory();
	if( read_header( read, t[0] ) )
		return( -1 );
	if( vips_image_write_prepare( t[0] ) ) 
		return( -1 );

	read->config.output.u.RGBA.rgba = VIPS_IMAGE_ADDR( t[0], 0, 0 );
	read->config.output.u.RGBA.stride = VIPS_IMAGE_SIZEOF_LINE( t[0] );
	read->config.output.u.RGBA.size = VIPS_IMAGE_SIZEOF_IMAGE( t[0] );
	read->config.output.is_external_memory = 1;

	if( WebPDecode( (uint8_t *) read->data, read->length, 
		&read->config) != VP8_STATUS_OK ) {
		vips_error( "webp2vips", "%s", _( "unable to read pixels" ) ); 
		return( -1 );
	}

	if( vips_image_write( t[0], out ) )
		return( -1 );

	return( 0 );
}

Example #2

File: webp2vips.c Project: allsmy/libvips

static int
read_image( Read *read, VipsImage *out )
{
	VipsImage **t = (VipsImage **) 
		vips_object_local_array( VIPS_OBJECT( out ), 3 );
	webp_decoder decoder;

	t[0] = vips_image_new_memory();
	if( read_header( read, t[0] ) )
		return( -1 );
	if( vips_image_write_prepare( t[0] ) ) 
		return( -1 );

	if( t[0]->Bands == 3 )
		decoder = WebPDecodeRGBInto;
	else
		decoder = WebPDecodeRGBAInto;

	if( !decoder( (uint8_t *) read->data, read->length, 
		VIPS_IMAGE_ADDR( t[0], 0, 0 ), 
		VIPS_IMAGE_SIZEOF_IMAGE( t[0] ),
		VIPS_IMAGE_SIZEOF_LINE( t[0] ) ) ) { 
		vips_error( "webp2vips", "%s", _( "unable to read pixels" ) ); 
		return( -1 );
	}

	if( vips_image_write( t[0], out ) )
		return( -1 );

	return( 0 );
}

Example #3

File: jpeg2vips.c Project: Jondeen/libvips

/* Auto-rotate, if rotate_image is set.
 */
static VipsImage *
read_jpeg_rotate( VipsObject *process, VipsImage *im )
{
	VipsImage **t = (VipsImage **) vips_object_local_array( process, 2 );
	VipsAngle angle = vips_autorot_get_angle( im );

	if( angle != VIPS_ANGLE_D0 ) {
		/* Need to copy to memory or disc, we have to stay seq.
		 */
		const guint64 image_size = VIPS_IMAGE_SIZEOF_IMAGE( im );
		const guint64 disc_threshold = vips_get_disc_threshold();

		if( image_size > disc_threshold ) 
			t[0] = vips_image_new_temp_file( "%s.v" );
		else
			t[0] = vips_image_new_memory();

		if( vips_image_write( im, t[0] ) ||
			vips_rot( t[0], &t[1], angle, NULL ) )
			return( NULL );
		im = t[1];
		(void) vips_image_remove( im, ORIENTATION );
	}

	return( im );
}

Example #4

File: webp2vips.c Project: binarytemple/debian-vips

static int
read_image( Read *read, VipsImage *out )
{
	VipsImage **t = (VipsImage **) 
		vips_object_local_array( VIPS_OBJECT( out ), 3 );
	guint64 length;
	void *data; 
	int fd;
	webp_decoder decoder;

	/* libwebp makes streaming very hard. We have to read to a full memory
	 * buffer, then copy to out.
	 *
	 * mmap the input file, it's slightly quicker.
	 */
	t[0] = vips_image_new_buffer();
	if( read_header( read, t[0] ) )
		return( -1 );
	if( vips_image_write_prepare( t[0] ) ) 
		return( -1 );

	if( !(fd = vips__open_image_read( read->filename )) )
		return( -1 );
	if( (length = vips_file_length( fd )) < 0 ) {
		vips_tracked_close( fd ); 
		return( -1 );
	}
	if( !(data = vips__mmap( fd, FALSE, length, 0 )) ) {
		vips_tracked_close( fd ); 
		return( -1 );
	}

	if( t[0]->Bands == 3 )
		decoder = WebPDecodeRGBInto;
	else
		decoder = WebPDecodeRGBAInto;

	if( !decoder( (uint8_t *) data, length, 
		VIPS_IMAGE_ADDR( t[0], 0, 0 ), 
		VIPS_IMAGE_SIZEOF_IMAGE( t[0] ),
		VIPS_IMAGE_SIZEOF_LINE( t[0] ) ) ) { 
		vips__munmap( data, length ); 
		vips_tracked_close( fd ); 
		vips_error( "webp2vips", "%s", _( "unable to read pixels" ) ); 
		return( -1 );
	}

	vips__munmap( data, length ); 
	vips_tracked_close( fd ); 

	if( vips_image_write( t[0], out ) )
		return( -1 );

	return( 0 );
}

Example #5

File: vips.c Project: sepastian/libvips

/* Predict the size of the header plus pixel data. Don't use off_t,
 * it's sometimes only 32 bits (eg. on many windows build environments) and we
 * want to always be 64 bit.
 */
static gint64
image_pixel_length( VipsImage *image )
{
	gint64 psize;

	switch( image->Coding ) {
	case VIPS_CODING_LABQ:
	case VIPS_CODING_RAD:
	case VIPS_CODING_NONE:
		psize = VIPS_IMAGE_SIZEOF_IMAGE( image );
		break;

	default:
		psize = image->Length;
		break;
	}

	return( psize + image->sizeof_header );
}