--- a/layout/reftests/w3c-css/import-tests.py
+++ b/layout/reftests/w3c-css/import-tests.py
@@ -44,16 +44,18 @@ gPrefixedProperties = [
     "column-rule-color",
     "column-rule-style",
     "column-rule-width",
     "columns",
     "column-span",
     "column-width"
 ]
 
+gPrefixingExts = {".html", ".htm", ".xht"}
+
 # Map of about:config prefs that need toggling, for a given test subdirectory.
 # Entries should look like:
 #  "$SUBDIR_NAME": "pref($PREF_NAME, $PREF_VALUE)"
 #
 # For example, when "@supports" was behind a pref, gDefaultPreferences had:
 #  "css3-conditional": "pref(layout.css.supports-rule.enabled,true)"
 gDefaultPreferences = {
 }
@@ -66,16 +68,17 @@ support_dirs_mapped = set()
 filemap = {}
 speclinkmap = {}
 propsaddedfor = []
 tests = []
 gOptions = None
 gArgs = None
 gTestfiles = []
 gTestFlags = {}
+gPngFiles = []
 
 def to_unix_path_sep(path):
     return path.replace('\\', '/')
 
 def log_output_of(subprocess):
     global gLog
     subprocess.wait()
     if (subprocess.returncode != 0):
@@ -116,32 +119,39 @@ def populate_test_files():
                 if f == "README" or \
                    f.find("-ref.") != -1:
                     continue
                 gTestfiles.append(os.path.join(dirpath, f))
 
     gTestfiles.sort()
 
 def copy_file(test, srcfile, destname, isSupportFile=False):
-    global gDestPath, gLog, gSrcPath
+    global gDestPath, gLog, gSrcPath, gPngFiles
     if not srcfile.startswith(gSrcPath):
         raise StandardError("Filename " + srcfile + " does not start with " + gSrcPath)
     logname = srcfile[len(gSrcPath):]
     gLog.write("Importing " + to_unix_path_sep(logname) +
                " to " + to_unix_path_sep(destname) + "\n")
     destfile = os.path.join(gDestPath, destname)
     destdir = os.path.dirname(destfile)
     if not os.path.exists(destdir):
         os.makedirs(destdir)
     if os.path.exists(destfile):
         if filecmp.cmp(srcfile, destfile):
             print "Warning: duplicate file {}".format(destname)
             return
         raise StandardError("file " + destfile + " already exists")
-    copy_and_prefix(test, srcfile, destfile, gPrefixedProperties, isSupportFile)
+    _, ext = os.path.splitext(srcfile)
+    if ext in gPrefixingExts:
+        copy_and_prefix(test, srcfile, destfile,
+                        gPrefixedProperties, isSupportFile)
+    else:
+        shutil.copy(srcfile, destfile)
+        if ext == ".png":
+            gPngFiles.append(destfile)
 
 def copy_support_files(test, dirname, spec):
     if dirname in support_dirs_mapped:
         return
     support_dirs_mapped.add(dirname)
     support_dir = os.path.join(dirname, "support")
     if not os.path.exists(support_dir):
         return
@@ -291,16 +301,51 @@ def read_fail_list():
         for line in f:
             line = line.strip()
             if not line or line.startswith("#"):
                 continue
             item = line.split()
             pat = re.compile(fnmatch.translate(item.pop()))
             gFailList.append((pat, item))
 
+def optimize_pngs():
+    global gDestPath, gLog, gPngFiles
+    PROCESSING_RE = re.compile(r"\*\* Processing: (.+)")
+    INPUT_SIZE_RE = re.compile(r"Input file size = (\d+ bytes)")
+    OUTPUT_SIZE_RE = re.compile(r"Output file size = (\d+ bytes)")
+
+    gLog.write("\n")
+    optipng = Popen(["optipng", "--version"] + gPngFiles,
+                    stderr=PIPE, universal_newlines=True)
+    gLog.write(optipng.stderr.readline())
+    processing = inputSize = None
+    for line in optipng.stderr:
+        if not line:
+            break
+        match = PROCESSING_RE.match(line)
+        if match:
+            processing = os.path.relpath(match.group(1), gDestPath)
+            processing = to_unix_path_sep(processing)
+            inputSize = None
+            continue
+        match = INPUT_SIZE_RE.match(line)
+        if match:
+            inputSize = match.group(1)
+            continue
+        match = OUTPUT_SIZE_RE.match(line)
+        if match:
+            if not processing or not inputSize:
+                raise StandardError("unexpected output from optipng")
+            gLog.write("Optimized {}: {} => {}\n".format(
+                processing, inputSize, match.group(1)))
+            processing = inputSize = None
+    optipng.wait()
+    if optipng.returncode != 0:
+        raise StandardError("error while running optipng")
+
 def main():
     global gDestPath, gLog, gTestfiles, gTestFlags, gFailList
     read_options()
     setup_paths()
     read_fail_list()
     setup_log()
     write_log_header()
     remove_existing_dirs()
@@ -340,12 +385,13 @@ def main():
         # We may mark a reftest fail for "match", but in that case there
         # is a good chance we do not fail the "mismatch" references.
         if "fails" in fail and testType == "!=":
             fail = ["skip"]
         test = fail + test
         listfile.write(" ".join(test) + "\n")
     listfile.close()
 
+    optimize_pngs()
     gLog.close()
 
 if __name__ == '__main__':
     main()

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index e473bf80efc66766cb32ec2cc60244ed37dc1157..08d508ba2f12bfc01ca24741f2727125406a2410
GIT binary patch
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index 82eeace7fc0c4202f79610978ab423e62abf8939..87ce881c705102db1da3b32aa26fbde3fbe93d6a
GIT binary patch
literal 1193
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index f6ac0ef7e8f6e192c9c26239884bf92b13cf67b8..48d1d884826bf4e54ba099b59aced1b7b0cb53fc
GIT binary patch
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index 59843ae54b64f6ce4f7e616d4be491c911ea84cf..856d2209344646a87e6025bb4fcb5c370e31c87e
GIT binary patch
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--- a/layout/reftests/w3c-css/received/import.log
+++ b/layout/reftests/w3c-css/received/import.log
@@ -158,8 +158,38 @@ Importing css-values-3/vh-support-atview
 Importing css-values-3/vh-support-margin.html to css-values-3/vh-support-margin.html
 Importing css-values-3/vh-support-transform-origin.html to css-values-3/vh-support-transform-origin.html
 Importing css-values-3/vh-support-transform-translate.html to css-values-3/vh-support-transform-translate.html
 Importing css-values-3/vh-support.html to css-values-3/vh-support.html
 Importing css-values-3/vh-zero-support.html to css-values-3/vh-zero-support.html
 Importing css-values-3/vh_not_refreshing_on_chrome.html to css-values-3/vh_not_refreshing_on_chrome.html
 Importing css-values-3/reference/vh_not_refreshing_on_chrome-ref.html to css-values-3/vh_not_refreshing_on_chrome-ref.html
 Importing css-values-3/vh_not_refreshing_on_chrome_iframe.html to css-values-3/vh_not_refreshing_on_chrome_iframe.html
+
+OptiPNG version 0.7.5
+Optimized css-values-3/support/1x1-maroon.png: 109 bytes => 108 bytes
+Optimized css-values-3/support/1x1-navy.png: 109 bytes => 108 bytes
+Optimized css-values-3/support/1x1-white.png: 109 bytes => 102 bytes
+Optimized css-values-3/support/60x60-gg-rr.png: 224 bytes => 185 bytes
+Optimized css-values-3/support/60x60-green.png: 218 bytes => 176 bytes
+Optimized css-values-3/support/60x60-red.png: 217 bytes => 176 bytes
+Optimized css-values-3/support/cat.png: 1883 bytes => 1057 bytes
+Optimized css-values-3/support/pattern-grg-rgr-grg.png: 222 bytes => 176 bytes
+Optimized css-values-3/support/pattern-grg-rrg-rgg.png: 231 bytes => 142 bytes
+Optimized css-values-3/support/pattern-rgr-grg-rgr.png: 223 bytes => 174 bytes
+Optimized css-values-3/support/pattern-tr.png: 137 bytes => 118 bytes
+Optimized css-values-3/support/ruler-h-50%.png: 691 bytes => 330 bytes
+Optimized css-values-3/support/ruler-h-50px.png: 671 bytes => 347 bytes
+Optimized css-values-3/support/ruler-v-100px.png: 760 bytes => 348 bytes
+Optimized css-values-3/support/ruler-v-50px.png: 757 bytes => 347 bytes
+Optimized css-values-3/support/swatch-blue.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/swatch-green.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/swatch-lime.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/swatch-orange.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/swatch-red.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/swatch-yellow.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/test-br.png: 1045 bytes => 1033 bytes
+Optimized css-values-3/support/test-inner-half-size.png: 180 bytes => 112 bytes
+Optimized css-values-3/support/test-outer.png: 2412 bytes => 1193 bytes
+Optimized css-values-3/support/test-tl.png: 1025 bytes => 1016 bytes
+Optimized css-values-3/support/test-tr.png: 1235 bytes => 1234 bytes
+Optimized css-values-3/support/support/swatch-green.png: 84 bytes => 83 bytes
+Optimized css-values-3/support/support/swatch-red.png: 84 bytes => 83 bytes