Add AVIF plugin (using libavif)

.ci/install.sh

@@ -23,7 +23,8 @@ if [[ $(uname) != CYGWIN* ]]; then
     sudo apt-get -qq install libfreetype6-dev liblcms2-dev python3-tk\
                              ghostscript libffi-dev libjpeg-turbo-progs libopenjp2-7-dev\
                              cmake meson imagemagick libharfbuzz-dev libfribidi-dev\
-                             sway wl-clipboard libopenblas-dev
+                             sway wl-clipboard libopenblas-dev\
+                             ninja-build build-essential nasm
 fi
 
 python3 -m pip install --upgrade pip
@@ -55,6 +56,9 @@ if [[ $(uname) != CYGWIN* ]]; then
     # raqm
     pushd depends && ./install_raqm.sh && popd
 
+    # libavif
+    pushd depends && ./install_libavif.sh && popd
+
     # extra test images
     pushd depends && ./install_extra_test_images.sh && popd
 else

.github/workflows/macos-install.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-brew install libtiff libjpeg openjpeg libimagequant webp little-cms2 freetype libraqm
+brew install libtiff libjpeg openjpeg libimagequant webp little-cms2 freetype openblas libraqm dav1d aom rav1e
 export PKG_CONFIG_PATH="/usr/local/opt/openblas/lib/pkgconfig"
 
 PYTHONOPTIMIZE=0 python3 -m pip install cffi
@@ -16,5 +16,8 @@ python3 -m pip install pyroma
 
 python3 -m pip install numpy
 
+# libavif
+pushd depends && ./install_libavif.sh && popd
+
 # extra test images
 pushd depends && ./install_extra_test_images.sh && popd

.github/workflows/test-cygwin.yml

@@ -54,6 +54,7 @@ jobs:
             liblcms2-devel
             libopenjp2-devel
             libraqm-devel
+            libavif-devel
             libtiff-devel
             libwebp-devel
             libxcb-devel

.github/workflows/test-mingw.yml

@@ -50,6 +50,7 @@ jobs:
               mingw-w64-x86_64-libimagequant \
               mingw-w64-x86_64-libjpeg-turbo \
               mingw-w64-x86_64-libraqm \
+              mingw-w64-x86_64-libavif \
               mingw-w64-x86_64-libtiff \
               mingw-w64-x86_64-libwebp \
               mingw-w64-x86_64-openjpeg2 \

.github/workflows/test-windows.yml

@@ -66,6 +66,8 @@ jobs:
         7z x winbuild\depends\nasm-2.16.01-win64.zip "-o$env:RUNNER_WORKSPACE\"
         echo "$env:RUNNER_WORKSPACE\nasm-2.16.01" >> $env:GITHUB_PATH
 
+        python -m pip install meson
+
         choco install ghostscript --version=10.0.0.20230317
         echo "C:\Program Files\gs\gs10.00.0\bin" >> $env:GITHUB_PATH
 
@@ -149,6 +151,10 @@ jobs:
       if: steps.build-cache.outputs.cache-hit != 'true'
       run: "& winbuild\\build\\build_dep_fribidi.cmd"
 
+    - name: Build dependencies / libavif
+      if: steps.build-cache.outputs.cache-hit != 'true'
+      run: "& winbuild\\build\\build_dep_libavif.cmd"
+
     # trim ~150MB for each job
     - name: Optimize build cache
       if: steps.build-cache.outputs.cache-hit != 'true'

Tests/check_avif_leaks.py

@@ -0,0 +1,42 @@
+from io import BytesIO
+
+import pytest
+
+from PIL import Image
+
+from .helper import is_win32, skip_unless_feature
+
+# Limits for testing the leak
+mem_limit = 1024 * 1048576
+stack_size = 8 * 1048576
+iterations = int((mem_limit / stack_size) * 2)
+test_file = "Tests/images/avif/hopper.avif"
+
+pytestmark = [
+    pytest.mark.skipif(is_win32(), reason="requires Unix or macOS"),
+    skip_unless_feature("avif"),
+]
+
+
+def test_leak_load():
+    from resource import RLIMIT_AS, RLIMIT_STACK, setrlimit
+
+    setrlimit(RLIMIT_STACK, (stack_size, stack_size))
+    setrlimit(RLIMIT_AS, (mem_limit, mem_limit))
+    for _ in range(iterations):
+        with Image.open(test_file) as im:
+            im.load()
+
+
+def test_leak_save():
+    from resource import RLIMIT_AS, RLIMIT_STACK, setrlimit
+
+    setrlimit(RLIMIT_STACK, (stack_size, stack_size))
+    setrlimit(RLIMIT_AS, (mem_limit, mem_limit))
+    for _ in range(iterations):
+        with Image.open(test_file) as im:
+            im.load()
+            test_output = BytesIO()
+            im.save(test_output, "AVIF")
+            test_output.seek(0)
+            test_output.read()

Tests/helper.py

@@ -2,6 +2,7 @@
 Helper functions.
 """
 
+import gc
 import logging
 import os
 import shutil
@@ -218,6 +219,7 @@ def _test_leak(self, core):
         start_mem = self._get_mem_usage()
         for cycle in range(self.iterations):
             core()
+            gc.collect()
             mem = self._get_mem_usage() - start_mem
             msg = f"memory usage limit exceeded in iteration {cycle}"
             assert mem < self.mem_limit, msg