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add no_strip option to dzsave

it's sometimes useful to have pyramid tiles with ICC profiles

see #1451
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jcupitt committed Oct 21, 2019
1 parent be7c140 commit 8337e1742880aad7a5c8ce5c10fc658a997d26f2
Showing with 20 additions and 3 deletions.
  1. +1 −0 ChangeLog
  2. +19 −3 libvips/foreign/dzsave.c
@@ -16,6 +16,7 @@
- add @interpretation and @format to rawload
- nifti load/save uses double for all floating point metadata
- add vips_error_buffer_copy()
- add @no_strip option to dzsave [kalozka1]

31/8/19 started 8.8.3
- revert sharpen restoring the input colourspace
@@ -81,6 +81,8 @@
* - write all associated images
* 19/12/18
* - add @skip_blanks
* 21/10/19
* - add @no_strip
*/

/*
@@ -454,6 +456,7 @@ struct _VipsForeignSaveDz {
int compression;
VipsRegionShrink region_shrink;
int skip_blanks;
gboolean no_strip;

/* Tile and overlap geometry. The members above are the parameters we
* accept, this next set are the derived values which are actually
@@ -588,12 +591,12 @@ write_image( VipsForeignSaveDz *dz,
void *buf;
size_t len;

/* Hopefully, no one will want the same metadata on all the images.
* Strip them.
/* We default to stripping all metadata. Only "no_strip" turns this
* off. Very few people really want metadata on every tile.
*/
vips_image_set_int( image, "hide-progress", 1 );
if( vips_image_write_to_buffer( image, format, &buf, &len,
"strip", TRUE,
"strip", !dz->no_strip,
NULL ) )
return( -1 );

@@ -2329,6 +2332,13 @@ vips_foreign_save_dz_class_init( VipsForeignSaveDzClass *class )
G_STRUCT_OFFSET( VipsForeignSaveDz, skip_blanks ),
-1, 65535, -1 );

VIPS_ARG_BOOL( class, "no_strip", 20,
_( "No strip" ),
_( "Don't strip tile metadata" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignSaveDz, no_strip ),
FALSE );

/* How annoying. We stupidly had these in earlier versions.
*/

@@ -2570,6 +2580,7 @@ vips_foreign_save_dz_buffer_init( VipsForeignSaveDzBuffer *buffer )
* * @compression: %gint zip deflate compression level
* * @region_shrink: #VipsRegionShrink how to shrink each 2x2 region
* * @skip_blanks: %gint skip tiles which are nearly equal to the background
* * @no_strip: %gboolean don't strip tiles
*
* Save an image as a set of tiles at various resolutions. By default dzsave
* uses DeepZoom layout -- use @layout to pick other conventions.
@@ -2609,6 +2620,10 @@ vips_foreign_save_dz_buffer_init( VipsForeignSaveDzBuffer *buffer )
* programs which wish to use fields from source files loaded via
* vips_openslideload().
*
* By default, all tiles are stripped, since very few people want a copy of
* the metadata on every tile. Set @no_strip if you really want to keep
* metadata.
*
* If @container is set to `zip`, you can set a compression level from -1
* (use zlib default), 0 (store, compression disabled) to 9 (max compression).
* If no value is given, the default is to store files without compression.
@@ -2662,6 +2677,7 @@ vips_dzsave( VipsImage *in, const char *name, ... )
* * @compression: %gint zip deflate compression level
* * @region_shrink: #VipsRegionShrink how to shrink each 2x2 region.
* * @skip_blanks: %gint skip tiles which are nearly equal to the background
* * @no_strip: %gboolean don't strip tiles
*
* As vips_dzsave(), but save to a memory buffer.
*

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