Adding upstream version 1.3+ds.upstream/1.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 91 insertions, 0 deletions

diff --git a/testfiles/cli_tests/l2compare.sh b/testfiles/cli_tests/l2compare.sh
new file mode 100755
index 0000000..cbb5540
--- /dev/null
+++ b/testfiles/cli_tests/l2compare.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Convert an image (or a single page of a PDF/PostScript document) to a bitmap
+# and calculate the relative root-mean-squared (L2) distance from the reference.
+#
+# Authors:
+#   Rafael Siejakowski <rs@rs-math.net>
+#
+# Copyright (C) 2022 Authors
+#
+# Released under GNU GPL v2+, read the file 'COPYING' for more information.
+#
+
+MY_LOCATION=$(dirname "$0")
+source "${MY_LOCATION}/../utils/functions.sh"
+
+ensure_command "convert"
+ensure_command "compare"
+ensure_command "bc"
+ensure_command "cp"
+
+OUTPUT_FILENAME="$1"
+OUTPUT_PAGE="$2"
+REFERENCE_FILENAME="$3"
+PERCENTAGE_DIFFERENCE_ALLOWED="$4"
+DPI="$5"
+
+if [ ! -f "${OUTPUT_FILENAME}" ]
+then
+    echo "Error: Test file '${OUTPUT_FILENAME}' not found."
+    exit 1
+fi
+
+if [ ! -f "${REFERENCE_FILENAME}" ]
+then
+    echo "Error: Reference file '${REFERENCE_FILENAME}' not found."
+    exit 1
+fi
+
+# Convert the output file to the PNG format
+CONVERSION_OPTIONS="-colorspace RGB"
+
+# Extract a page from multipage PS/PDF if requested
+OUTFILE_SUFFIX=""
+if [[ "x$OUTPUT_PAGE" != "x" ]]
+then
+    OUTFILE_SUFFIX="[${OUTPUT_PAGE}]" # Use ImageMagick's bracket operator
+fi
+
+DPI_OPTION=""
+if [[ "x$DPI" != "x" ]]
+then
+    DPI_OPTION="-density $DPI"
+fi
+
+if [[ $(identify -format "%m" "${OUTPUT_FILENAME}") != "PNG" ]]
+then
+    if ! convert $DPI_OPTION "${OUTPUT_FILENAME}${OUTFILE_SUFFIX}" $CONVERSION_OPTIONS "${OUTPUT_FILENAME}-output.png"
+    then
+        echo "Warning: Failed to convert test file '${OUTPUT_FILENAME}' to PNG format. Skipping comparison test."
+        exit 42
+    fi
+else
+    cp "${OUTPUT_FILENAME}" "${OUTPUT_FILENAME}-output.png"
+fi
+
+
+# Copy the reference file
+cp "${REFERENCE_FILENAME}" "${OUTPUT_FILENAME}-reference.png"
+
+# Compare the two files
+COMPARE_OUTPUT=$(compare 2>&1 -metric RMSE "${OUTPUT_FILENAME}-output.png" "${OUTPUT_FILENAME}-reference.png" \
+                 "${OUTPUT_FILENAME}-diff.png")
+RELATIVE_ERROR=$(get_compare_result "$COMPARE_OUTPUT")
+PERCENTAGE_ERROR=$(fraction_to_percentage "$RELATIVE_ERROR")
+
+if (( $(is_relative_error_within_tolerance "$RELATIVE_ERROR" "$PERCENTAGE_DIFFERENCE_ALLOWED") ))
+then
+    # Test passed: print stats and clean up the files.
+    echo "Fuzzy comparison PASSED; error of ${PERCENTAGE_ERROR}% is within ${PERCENTAGE_DIFFERENCE_ALLOWED}% tolerance."
+    for FILE in ${OUTPUT_FILENAME}{,-reference.png,-output.png,-diff.png}
+    do
+        rm -f "${FILE}"
+    done
+else
+    # Test failed!
+    echo "Fuzzy comparison FAILED; error of ${PERCENTAGE_ERROR}% exceeds ${PERCENTAGE_DIFFERENCE_ALLOWED}% tolerance."
+    exit 1
+fi
+