Merge branch '8.10'

ChangeLog

@@ -10,11 +10,13 @@
 - add _source load support for pdfium
 - add "seed" param to perlin, worley and gaussnoise
 
-18/12/20 started 8.10.5
+22/12/20 start 8.10.6
-- fix potential /0 in animated webp load [lovell]
 - don't seek on bad file descriptors [kleisauke]
 - check for null memory sources [kleisauke]
 
+18/12/20 started 8.10.5
+- fix potential /0 in animated webp load [lovell]
+
 14/12/20 started 8.10.4
 - fix spng detection
 

doc/Examples.xml

@@ -19,7 +19,7 @@
 <refsect3 xml:id="average-a-region-of-interest-box-on-an-image">
   <title>Average a region of interest box on an image</title>
   <programlisting language="python">
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 import sys
 import pyvips
@@ -31,7 +31,7 @@ height = 64
 
 image = pyvips.Image.new_from_file(sys.argv[1])
 roi = image.crop(left, top, width, height)
-print 'average:', roi.avg()
+print('average:', roi.avg())
 </programlisting>
 </refsect3>
 <refsect3 xml:id="libvips-and-numpy">
@@ -40,7 +40,7 @@ print 'average:', roi.avg()
     You can use <literal>pyvips.Image.new_from_memory()</literal> to make a vips image from an area of memory. The memory array needs to be laid out band-interleaved, as a set of scanlines, with no padding between lines.
   </para>
   <programlisting language="python">
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 import sys
 import time
@@ -50,7 +50,7 @@ from PIL import Image
 import numpy as np
 
 if len(sys.argv) != 3:
-    print('usage: {0} input-filename output-filename'.format(sys.argv[0]))
+    print(f'usage: {sys.argv[0]} input-filename output-filename')
     sys.exit(-1)
 
 # map vips formats to np dtypes
@@ -135,7 +135,7 @@ $ for i in {1..1000}; do cp x.tif test/$i.tif; done
     And run this Python program on them:
   </para>
   <programlisting>
-$ time ./try255.py x.tif[squash,compression=ccittfax4,strip,bigtif] test/*
+$ time python try255.py x.tif[squash,compression=ccittfax4,strip,bigtiff] test/*
 real    1m59.924s
 user    4m5.388s
 sys 0m8.936s
@@ -147,7 +147,8 @@ sys 0m8.936s
     If you wanted to handle transparency, or if you wanted mixed CMYK and RGB images, you’d need to do some more work to convert them all into the same colourspace before inserting them.
   </para>
   <programlisting language="python">
-#!/usr/bin/env python
+#!/usr/bin/python3
+#file try255.py
 
 import sys
 import random

doc/Using-vipsthumbnail.xml

@@ -21,6 +21,14 @@ $filename = "image.jpg";
 $image = Vips\Image::thumbnail($filename, 200, ["height" => 200]);
 $image->writeToFile("my-thumbnail.jpg");
 </programlisting>
+<para>
+  You can also call <literal>thumbnail_source</literal> from the CLI, for example:
+</para>
+<programlisting>
+$ cat k2.jpg | \
+    vips thumbnail_source [descriptor=0] .jpg[Q=90] 128 | \
+    cat &gt; x.jpg
+</programlisting>
 <refsect3 xml:id="libvips-options">
   <title>libvips options</title>
   <para>
@@ -263,7 +271,7 @@ $ ls -l tn_shark.jpg
     Now transform to sRGB and don’t attach a profile (you can also use <literal>strip</literal>, though that will remove <emphasis>all</emphasis> metadata from the image):
   </para>
   <programlisting>
-$ vipsthumbnail shark.jpg --eprofile srgb -o tn_shark.jpg[profile=none]
+$ vipsthumbnail shark.jpg --export-profile srgb -o tn_shark.jpg[profile=none]
 $ ls -l tn_shark.jpg 
 -rw-r–r– 1 john john 4229 Nov  9 14:33 tn_shark.jpg
 </programlisting>
@@ -274,22 +282,11 @@ $ ls -l tn_shark.jpg
     <literal>tn_shark.jpg</literal> will look identical to a user, but it’s almost half the size.
   </para>
   <para>
-    You can also specify a fallback input profile to use if the image has no embedded one. This can often happen with CMYK images, producing an error message like:
+    You can also specify a fallback input profile to use if the image has no embedded one. For example, perhaps you somehow know that a JPG is in Adobe98 space, even though it has no embedded profile.
   </para>
   <programlisting>
-$ vipsthumbnail kgdev.jpg
+$ vipsthumbnail kgdev.jpg --input-profile /my/profiles/a98.icm 
-vipsthumbnail: unable to thumbnail kgdev.jpg
-vips_colourspace: no known route from 'cmyk' to 'srgb'
 </programlisting>
-  <para>
-    If you supply a CMYK profile, it will be able to convert the image, for example:
-  </para>
-  <programlisting>
-$ vipsthumbnail kgdev.jpg --iprofile cmyk 
-</programlisting>
-  <para>
-    (As before, the magic string <literal>cmyk</literal> selects a high-quality CMYK profile that’s built into libvips, but you can use any CMYK profile you like.)
-  </para>
 </refsect3>
 <refsect3 xml:id="final-suggestion">
   <title>Final suggestion</title>
@@ -299,9 +296,8 @@ $ vipsthumbnail kgdev.jpg --iprofile cmyk
   <programlisting>
 $ vipsthumbnail fred.jpg \
     --size 128 \
-    --eprofile srgb \
+    --export-profile srgb \
-    -o tn_%s.jpg[optimize_coding,strip] \
+    -o tn_%s.jpg[optimize_coding,strip] 
-    --eprofile srgb
 </programlisting>
 </refsect3>