1 files changed, 63 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/check-refs.sh b/libs/cairo-1.16.0/test/check-refs.sh
new file mode 100755
index 0000000..81ef81b
--- /dev/null
+++ b/libs/cairo-1.16.0/test/check-refs.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+cd $(dirname $0)/reference || exit
+
+pdiff=$1
+[ -n "$pdiff" ] || pdiff=../pdiff/perceptualdiff
+if [ ! -e "${pdiff}" ]; then
+    echo "Error:  requires pdiff executable"
+    exit 128
+fi
+
+for file in *.ref.png; do
+    test=$(echo $file | cut -d'.' -f1)
+    target=$(echo $file | cut -d'.' -f2)
+    format=$(echo $file | cut -d'.' -f3)
+    notes=""
+    ref=""
+    result=""
+
+    if [ $target = 'base' ]; then
+        # Ignore the base images for this script's purposes
+        continue
+    elif [ $target = 'ref' ]; then
+        # This is actually the baseline reference image
+        continue
+    elif [ $format = 'ref' ]; then
+        # This is either a format-specific reference, or a target-specific/format-generic image
+        # In either case, compare it against the generic reference image
+        ref="$test.ref.png"
+    else
+        # Prefer the target-specific/format-generic reference image, if available
+	ref="$test.$target.ref.png"
+	if [ ! -e $ref ]; then
+            ref="$test.$format.ref.png"
+	fi
+    fi
+
+    # Special cases
+    if [ $test = "create-from-png" ]; then
+	# The create-from-png test utilizes multiple reference images directly
+	continue
+    elif [ $test = "fallback-resolution" ]; then
+	# The fallback-resolution test generates a set of reference images;
+	# These won't be redundant with one another, but just ignore them all.
+	continue
+    fi
+
+    if [ -e $ref ]; then
+	if cmp --silent "$ref" "$file" ; then
+	    printf "redundant: %s and %s are byte-by-byte identical files\n" $file $ref
+	else
+            # Run perceptualdiff with minimum threshold
+            pdiff_output=$($pdiff $ref $file -threshold 1)
+            result=${pdiff_output%:*}
+            notes=$(echo "${pdiff_output#*: }" | tail -n 1)
+            if [ "$result" = "PASS" ] && [ "$notes" = "Images are binary identical" ]; then
+		printf "redundant: %s and %s are pixel equivalent images\n" $file $ref
+		notes=""
+            fi
+	fi
+    fi
+
+done