2011-04-06 Tony Chang <tony@chromium.org>

        Reviewed by Darin Adler.

        teach run-webkit-tests to read checksums from png files
        https://bugs.webkit.org/show_bug.cgi?id=57993

        * Scripts/old-run-webkit-tests: Read the first 2k of a .png if there's
          no .checksum and look for the checksum in there.

git-svn-id: svn://svn.chromium.org/blink/trunk@83120 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Tools/ChangeLog

+2011-04-06  Tony Chang  <tony@chromium.org>
+
+        Reviewed by Darin Adler.
+
+        teach run-webkit-tests to read checksums from png files
+        https://bugs.webkit.org/show_bug.cgi?id=57993
+
+        * Scripts/old-run-webkit-tests: Read the first 2k of a .png if there's
+          no .checksum and look for the checksum in there.
+
 2011-04-06  David Dorwin  <ddorwin@chromium.org>
 
         Reviewed by David Levin.

third_party/WebKit/Tools/Scripts/old-run-webkit-tests

@@ -105,6 +105,7 @@ sub openWebSocketServerIfNeeded();
 sub pathcmp($$);
 sub printFailureMessageForTest($$);
 sub processIgnoreTests($$);
+sub readChecksumFromPng($);
 sub readFromDumpToolWithTimer(**);
 sub readSkippedFiles($);
 sub recordActualResultsAndDiff($$);
@@ -740,6 +741,8 @@ for my $test (@tests) {
             
             # Format expected hash into a suffix string that is appended to the path / URL passed to DRT
             $suffixExpectedHash = "'$expectedHash";
+        } elsif (my $expectedHash = readChecksumFromPng(File::Spec->catfile($expectedPixelDir, "$base-$expectedTag.png"))) {
+            $suffixExpectedHash = "'$expectedHash";
         }
     }
 
@@ -2454,6 +2457,15 @@ sub readSkippedFiles($)
     }
 }
 
+sub readChecksumFromPng($)
+{
+    my ($path) = @_;
+    my $data;
+    if (open(PNGFILE, $path) && read(PNGFILE, $data, 2048) && $data =~ /tEXtchecksum\0([a-fA-F0-9]{32})/) {
+        return $1;
+    }
+}
+
 my @testsFound;
 
 sub isUsedInReftest