doc fixups

TODO

@@ -6,27 +6,20 @@
   on set_progress(FALSE) vips_sink_disc() should stop calling
   vips_image_preeval()
 
-- shouldn't 
+  progress reporting should be done by vips.c, not by libvips?
+
+
+
+
+
 
-	$ vips invert --help
 
-  produce help for invert? or did that get removed?
 
 - threadpool recyling might be useful for dzsave?
 
 
 
 
-- can we call affine from nip2 vips_call? do we need a double array?
-
-
-
-- the docs reference vips__temp_name() several times, but we don't doc it
-
-  where should we discuss the temporary directory? vips_image_new_temp_file()
-  I guess. What about vips_system()?
-
-
 - check and fix up docs
 
   index items should all be links

libvips/iofuncs/image.c

@@ -2056,9 +2056,13 @@ vips_image_set_delete_on_close( VipsImage *image, gboolean delete_on_close )
  * Make a "w" disc #VipsImage which will be automatically unlinked when it is
  * destroyed. @format is something like "%s.v" for a vips file.
  *
- * The file is created in the temporary directory, see vips__temp_name().
+ * The file is created in the temporary directory. This is set with the
+ * environment variable TMPDIR. If this is not set, then on Unix systems, vips
+ * will default to /tmp. On Windows, vips uses GetTempPath() to find the
+ * temporary directory. 
  *
- * See also: vips__temp_name().
+ * vips uses g_mkstemp() to make the temporary filename. They generally look
+ * something like "vips-12-EJKJFGH.v".
  *
  * Returns: the new #VipsImage, or %NULL on error.
  */

libvips/iofuncs/system.c

@@ -314,27 +314,19 @@ vips_system_init( VipsSystem *system )
  * vips_system() runs a command, optionally passing a set of images in and 
  * optionally getting an image back. The command's stdout is returned in @log. 
  *
- * First, if @in is set, the array of images are written to files. The 
+ * First, if @in is set, the array of images are written to files. See
- * filenames are formed by substituting something like "vips-49857-1" for 
+ * vips_image_new_temp_file() to see how temporary files are created. 
- * the first %%s in @in_format, then prepending "/tmp". If the environment 
- * variable TMPDIR is defined, it can be used to set a different temporary 
- * directory. 
- *
- * On Windows, if the environment variable TMPDIR is not defined, VIPS calls 
- * GetTempPath() to get the user's preferred temporary area. If that fails, it
- * defaults to C:\temp.
- *
  * If @in_format is
- * something like "%%s.png", the file will be written in PNG format. By
+ * something like %s.png, the file will be written in PNG format. By
- * default, @in_format is "%%s.tif". 
+ * default, @in_format is %s.tif. 
  *
  * If @out_format is set, an output filename is formed in the same way.
  *
- * The command string to run is made by substituting the first set of %%s 
+ * The command string to run is made by substituting the first set of %s 
  * in @cmd_format for the names of the input files, if @in is set, and then 
- * the next %%s for the output filename, if @out_format is set. 
+ * the next %s for the output filename, if @out_format is set. 
- * You can put a number between the %% and the s to change the order in which
+ * You can put a number between the % and the s to change the order 
- * the substitution occurs.
+ * in which the substitution occurs.
  *
  * The command is executed with popen() and the output captured in @log. 
  *