support --strip for tiffsave

stops metadata save

ChangeLog

@@ -12,6 +12,7 @@
 - support tiff orientation tag
 - autorotate option for tiff load
 - tiffsave converts for jpg if jpg compression is turned on
+- tiffsave supports --strip
 
 18/5/16 started 8.3.2
 - more robust vips image reading

TODO

@@ -1,5 +1,3 @@
-- tiff write does not support [strip]
-
 - add more webp tests to py suite
 
 - try moving some more of the CLI tests to py

libvips/foreign/tiff.h

@@ -50,7 +50,8 @@ int vips__tiff_write( VipsImage *in, const char *filename,
 	VipsForeignTiffResunit resunit, double xres, double yres,
 	gboolean bigtiff,
 	gboolean rgbjpeg,
-	gboolean properties );
+	gboolean properties,
+	gboolean strip );
 
 int vips__tiff_read_header( const char *filename, VipsImage *out, 
 	int page, gboolean autorotate );

libvips/foreign/tiffsave.c

@@ -166,7 +166,8 @@ vips_foreign_save_tiff_build( VipsObject *object )
 		tiff->resunit, tiff->xres, tiff->yres,
 		tiff->bigtiff,
 		tiff->rgbjpeg,
-		tiff->properties ) )
+		tiff->properties,
+		save->strip ) )
 		return( -1 );
 
 	return( 0 );
@@ -353,6 +354,7 @@ vips_foreign_save_tiff_init( VipsForeignSaveTiff *tiff )
  * * @yres: %gdouble vertical resolution in pixels/mm
  * * @bigtiff: set %TRUE to write a BigTiff file
  * * @properties: set %TRUE to write an IMAGEDESCRIPTION tag
+ * * @strip: set %TRUE to block metadata save
  *
  * Write a VIPS image to a file as TIFF.
  *

libvips/foreign/vips2tiff.c

@@ -160,6 +160,8 @@
  * 	- better alpha handling, thanks sadaqatullahn
  * 21/12/15
  * 	- write TIFFTAG_IMAGEDESCRIPTION
+ * 2/6/16
+ * 	- support strip option
  */
 
 /*
@@ -278,6 +280,7 @@ struct _Write {
 	int bigtiff;			/* True for bigtiff write */
 	int rgbjpeg;			/* True for RGB not YCbCr */
 	int properties;			/* Set to save XML props */
+	int strip;			/* Don't write metadata */
 };
 
 /* Open TIFF for output.
@@ -578,12 +581,13 @@ write_tiff_header( Write *write, Layer *layer )
 	TIFFSetField( tif, TIFFTAG_YRESOLUTION, 
 		VIPS_FCLIP( 0.01, write->yres, 1000000 ) );
 
-	if( write_embed_profile( write, tif ) ||
-		write_embed_xmp( write, tif ) ||
-		write_embed_ipct( write, tif ) ||
-		write_embed_photoshop( write, tif ) ||
-		write_embed_imagedescription( write, tif ) )
-		return( -1 ); 
+	if( !write->strip ) 
+		if( write_embed_profile( write, tif ) ||
+			write_embed_xmp( write, tif ) ||
+			write_embed_ipct( write, tif ) ||
+			write_embed_photoshop( write, tif ) ||
+			write_embed_imagedescription( write, tif ) )
+			return( -1 ); 
 
 	if( vips_image_get_typeof( write->im, VIPS_META_ORIENTATION ) &&
 		!vips_image_get_int( write->im, 
@@ -875,7 +879,8 @@ write_new( VipsImage *im, const char *filename,
 	VipsForeignTiffResunit resunit, double xres, double yres,
 	gboolean bigtiff,
 	gboolean rgbjpeg,
-	gboolean properties )
+	gboolean properties,
+	gboolean strip )
 {
 	Write *write;
 
@@ -898,6 +903,7 @@ write_new( VipsImage *im, const char *filename,
 	write->bigtiff = bigtiff;
 	write->rgbjpeg = rgbjpeg;
 	write->properties = properties;
+	write->strip = strip;
 
 	write->resunit = get_resunit( resunit );
 	write->xres = xres;
@@ -1541,12 +1547,13 @@ write_copy_tiff( Write *write, TIFF *out, TIFF *in )
 
 	/* We can't copy profiles or xmp :( Set again from Write.
 	 */
-	if( write_embed_profile( write, out ) ||
-		write_embed_xmp( write, out ) ||
-		write_embed_ipct( write, out ) ||
-		write_embed_photoshop( write, out ) ||
-		write_embed_imagedescription( write, out ) )
-		return( -1 );
+	if( !write->strip ) 
+		if( write_embed_profile( write, out ) ||
+			write_embed_xmp( write, out ) ||
+			write_embed_ipct( write, out ) ||
+			write_embed_photoshop( write, out ) ||
+			write_embed_imagedescription( write, out ) )
+			return( -1 );
 
 	buf = vips_malloc( NULL, TIFFTileSize( in ) );
 	n = TIFFNumberOfTiles( in );
@@ -1613,7 +1620,7 @@ vips__tiff_write( VipsImage *in, const char *filename,
 	VipsForeignTiffResunit resunit, double xres, double yres,
 	gboolean bigtiff,
 	gboolean rgbjpeg,
-	gboolean properties )
+	gboolean properties, gboolean strip )
 {
 	Write *write;
 
@@ -1632,7 +1639,7 @@ vips__tiff_write( VipsImage *in, const char *filename,
 		compression, Q, predictor, profile,
 		tile, tile_width, tile_height, pyramid, squash,
 		miniswhite, resunit, xres, yres, bigtiff, rgbjpeg, 
-		properties )) )
+		properties, strip )) )
 		return( -1 );
 
 	if( vips_sink_disc( write->im, write_strip, write ) ) {