[Gnash-dev] ColorTransform and EditText (YouTube buzz videos)

[Michael Fötsch]

Hi,

On the YouTube front page, there's an SWF with "Videos being watched 
right now". When you hover over a thumbnail, the video title appears 
beneath the thumbnail. In the proprietary player, the title appears in 
blue; in Gnash, it's white on white, so this is a bug.

The TextField has RGB=0,50,151. It's the child of a sprite with a 
ColorTransform that forces all colors to white. In Flash 10, the 
parent's ColorTransform doesn't seem to affect the TextField. In Gnash, 
TextField::get_world_cxform accumulates the ColorTransforms of the 
parents. See also the test case that I'm attaching. (Use it with 
`swfmill xml2swf cxtest.xml cxtest.swf`)

In TextField::get_world_cxform, I found this comment:

"Linux version of Adobe's player also ignores tint transform, so we 
should (or not) return an identity cxform here. This has to be discussed..."

Has this been discussed already?


If I can help with testing or coding for this bug, please let me know how.

Kind Regards,
M.F.

<?xml version="1.0"?>
<swf version="7" compressed="1">
  <Header framerate="12" frames="1">
    <size>
      <Rectangle left="0" right="6400" top="0" bottom="4800"/>
    </size>
    <tags>
      <SetBackgroundColor>
        <color>
          <Color red="255" green="255" blue="255"/>
        </color>
      </SetBackgroundColor>

      <!-- This EditText is blue with alpha=128 --> 
      <DefineEditText objectID="1" wordWrap="1" multiLine="1" password="0" 
readOnly="0" autoSize="0" hasLayout="1" notSelectable="0" hasBorder="0" 
isHTML="0" useOutlines="0" fontRef="9" fontHeight="252" align="2" 
leftMargin="0" rightMargin="0" indent="0" leading="0" variableName="" 
initialText="hello world!">
        <size>
          <Rectangle left="0" right="6400" top="0" bottom="3200"/>
        </size>
        <color>
          <Color red="0" green="0" blue="255" alpha="128"/>
        </color>
      </DefineEditText>

      <DefineSprite objectID="2" frames="1">
        <tags>
          <PlaceObject2 replace="0" depth="1" objectID="1">
            <transform>
              <Transform transX="0" transY="0"/>
            </transform>
          </PlaceObject2>
          <ShowFrame/>
          <End/>
        </tags>
      </DefineSprite>

      <!--
          This is the parent of the EditText. It has a ColorTransform that 
converts all colors to red
          and leaves alpha unaffected.
          In Gnash, the child EditText appears red, still with alpha=128.
          In Flash 10, the ColorTransform does not affect the EditText (still 
blue). The original alpha
          of the EditText is ignored (alpha=255).
      -->
      <PlaceObject2 replace="0" depth="1" objectID="2">
        <transform>
          <Transform scaleX="1" scaleY="1" transX="0" transY="0"/>
        </transform>
        <colorTransform>
          <ColorTransform2 factorRed="0" factorGreen="0" factorBlue="0" 
factorAlpha="256" offsetRed="255" offsetGreen="0" offsetBlue="0" 
offsetAlpha="0"/>
        </colorTransform>
      </PlaceObject2>
      <ShowFrame/>
      <End/>
    </tags>
  </Header>
</swf>