[meson] Add first regression test to FreeType

* tests/README.md: documentation explaining how to
  build and run the tests with the Meson build.

* tests/scripts/download-test-fonts.sh: Simple script
  to download test font files to the 'tests/data/'
  folder.

* meson.build, meson_options.txt, tests/meson.build:
  Add 'tests' option to enable building and running the
  test programs, disabled by default.

* tests/issue-1063/main.c: Simple regression test to
  exhibit issue 1063.

* .gitignore: Ignore the content of the tests/data/
  folder for now.

1 files changed, 66 insertions, 0 deletions

diff --git a/tests/scripts/download-test-fonts.sh b/tests/scripts/download-test-fonts.sh
new file mode 100755
index 000000000..1158f10c5
--- /dev/null
+++ b/tests/scripts/download-test-fonts.sh
@@ -0,0 +1,66 @@
+#!/usr/bin/bash
+# Download test fonts used by the FreeType regression test programs.
+# These will be copied to $FREETYPE/tests/data/
+# Each font file contains an 8-hexchar prefix corresponding to its md5sum
+
+set -e
+
+export LANG=C
+export LC_ALL=C
+
+PROGDIR=$(dirname "$0")
+PROGNAME=$(basename "$0")
+
+# Download a file from a given URL
+#
+# $1: URL
+# $2: Destination directory
+# $3: If not empty, destination file name. Default is to take
+# the URL's basename.
+#
+download_file () {
+  local URL=$1
+  local DST_DIR=$2
+  local DST_FILE=$3
+  if [[ -z "$DST_FILE" ]]; then
+    DST_FILE=$(basename "$URL")
+  fi
+  echo "URL: $URL"
+  wget -q -O "$DST_DIR/$DST_FILE" "$URL"
+}
+
+# $1: URL
+# $2: Destination directory
+# $3+: Optional file list, otherwise the full archive is extracted to $2
+download_and_extract_zip () {
+  local URL=$1
+  local DST_DIR=$2
+  shift
+  shift
+  TEMP_DST_DIR=$(mktemp -d)
+  TEMP_DST_NAME="a.zip"
+  download_file "$URL" "$TEMP_DST_DIR" "$TEMP_DST_NAME"
+  unzip -qo "$TEMP_DST_DIR/$TEMP_DST_NAME" -d "$DST_DIR" "$@"
+  rm -rf "$TEMP_DST_DIR"
+}
+
+# $1: File path
+# $2: Expected md5sum
+md5sum_check () {
+  local FILE=$1
+  local EXPECTED=$2
+  local HASH=$(md5sum "$FILE" | cut -d" " -f1)
+  if [[ "$EXPECTED" != "$HASH" ]]; then
+    echo "$FILE: Invalid md5sum $HASH expected $EXPECTED"
+    return 1
+  fi
+}
+
+INSTALL_DIR=$(cd $PROGDIR/.. && pwd)/data
+
+mkdir -p "$INSTALL_DIR"
+
+# See https://gitlab.freedesktop.org/freetype/freetype/-/issues/1063
+download_and_extract_zip "https://github.com/python-pillow/Pillow/files/6622147/As.I.Lay.Dying.zip" "$INSTALL_DIR"
+mv "$INSTALL_DIR/As I Lay Dying.ttf" "$INSTALL_DIR/As.I.Lay.Dying.ttf"
+md5sum_check "$INSTALL_DIR/As.I.Lay.Dying.ttf" e153d60e66199660f7cfe99ef4705ad7