Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

1 files changed, 45 insertions, 0 deletions

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+# Print Reftests
+
+Print reftests are like ordinary [reftests](reftests), except that the
+output is rendered to pagninated form and then compared page-by-page
+with the reference.
+
+Print reftests are distinguished by the string `-print` in the
+filename immediately before the extension, or by being under a
+directory named `print`. Examples:
+
+- `css/css-foo/bar-print.html` is a print reftest
+- `css/css-foo/print/bar.html` is a print reftest
+- `css/css-foo/bar-print-001.html` is **not** a print reftest
+
+
+Like ordinary reftests, the reference is specified using a `<link
+rel=match>` element.
+
+The default page size for print reftests is 12.7 cm by 7.62 cm (5
+inches by 3 inches).
+
+All the features of ordinary reftests also work with print reftests
+including [fuzzy matching](reftests.html#fuzzy-matching). Any fuzzy
+specifier applies to each image comparison performed i.e. separately
+for each page.
+
+## Page Ranges
+
+In some cases it may be desirable to only compare a subset of the
+output pages in the reftest. This is possible using
+```
+<meta name=reftest-pages content=[range-specifier]>
+```
+Where a range specifier has the form
+```
+range-specifier = <specifier-item> ["," <specifier-item>]*
+specifier-item = <int> | <int>? "-" <int>?
+```
+
+For example to specify rendering pages 1 and 2, 4, 6 and 7, and 9 and
+10 of a 10 page page document one could write:
+
+```
+<meta name=reftest-pages content="-2,4,6,7,9-">
+```