[Laszlo-dev] Implementing full FTE and TLF support for OpenLaszlo and Flash10

[Raju Bitter]

The changeset has been committed, it's in Trunk now. The test file
(for anyone interested) can be found here:
http://localhost:8080/trunk/test/tlf/embedascff.lzx

On Fri, Oct 14, 2011 at 2:47 PM, Raju Bitter
<r.bitter.mailinglists at googlemail.com> wrote:
> I have checked in a changeset for review, adding the embedascff
> property to font. The changeset contains a test file as well.
> openlaszlo/patches/raju-20111014-aaS.tar
>
> A screenshot of the test file in action has been attached to the JIRA:
> http://jira.openlaszlo.org/jira/secure/attachment/13472/TestScreenShot.jpg
>
> On Wed, Oct 12, 2011 at 3:54 PM, Raju Bitter
> <r.bitter.mailinglists at googlemail.com> wrote:
>> I have attached a screenshot of a proof-of-concept app using TLF 1.0
>> and a custom font embedded with embedAsCFF='true'.
>> http://jira.openlaszlo.org/jira/secure/attachment/13470/Proof-of-concept+of+TLF+TextFlow+with+embedded+font+and+rotation..jpg
>>
>> On Wed, Oct 12, 2011 at 1:23 PM, Raju Bitter
>> <r.bitter.mailinglists at googlemail.com> wrote:
>>> I've created a JIRA here
>>> http://jira.openlaszlo.org/jira/browse/LPP-10093 for the embedAsCFF
>>> attribute handling. I have that working already locally for
>>>
>>> <font name="LibertineRegular" src="LinBiolinum_r.otf" embedascff="true" />,
>>>
>>> and I can use rotated text with a TextFlow component. Text quality
>>> looks very good. But I have a few questions:
>>>
>>> 1) What should the name of the property be? I suppose embedascff would
>>> be the best choice.
>>>
>>> 2) How should multiple fonts be treated? Should the embedascff be set
>>> on the font tag, or the face tag (less optimal in my eyes)?
>>> <font name="myfont" embedascff="true">
>>>  <face src="myfont.otf"      style="plain"      />
>>>  <face src="myfont-bold.otf" style="bold"       />
>>>  <face src="myfont-ital.otf" style="italic"     />
>>>  <face src="myfont-bita.otf" style="bold italic"/>
>>> </font>
>>>
>>> 3) How is the usage of CFF fonts going to affect DHTML font embedding?
>>> Haven't investigated, yet.
>>>
>>> 4) Compiler implementation question:
>>> What is the org.openlaszlo.compiler.Canvas.mInfo element used for?
>>> Does the new property 'embedascff' need to be added to the mInfo
>>> element, e.g.
>>> File: org.openlaszlo.compiler.FontCompiler#compileFont
>>>
>>>    private void compileFont(String name, Element element) {
>>>        String style = element.getAttributeValue("style");
>>>        try {
>>>            String path = mEnv.resolveReference(element).getAbsolutePath();
>>>            String embedAsCFF = null;
>>>            if (mEnv.isCanvas()) {
>>>              Element info = new Element("resolve");
>>>              info.setAttribute("src", element.getAttributeValue("src"));
>>>              info.setAttribute("pathname",
>>> mEnv.resolveReference(element).toString());
>>>              embedAsCFF = element.getAttributeValue("embedascff");
>>>              if (embedAsCFF == null) {
>>>                  // Default value should be false to support embedded
>>> fonts in Flash TextField components.
>>>                  // See http://jira.openlaszlo.org/jira/browse/LPP-9140
>>>                  embedAsCFF = "false";
>>>              }
>>>              info.setAttribute("embedascff", embedAsCFF);
>>>              mEnv.getCanvas().addInfo(info);
>>>            }
>>>
>>> Thanks,
>>> Raju
>>>
>>> On Tue, Oct 11, 2011 at 4:25 PM, Raju Bitter
>>> <r.bitter.mailinglists at googlemail.com> wrote:
>>>> Great, thanks Henry. I appreciate your help!
>>>>
>>>> For now, I'll use these two wiki pages to collect the information I have:
>>>> http://wiki.openlaszlo.org/Adobe_TextLayoutFramework
>>>> http://wiki.openlaszlo.org/Enhanced_Text_API
>>>>
>>>> OL trunk includes TLF 1.0 at the moment. Flex 4.5 ships with TLF 2.0.
>>>>
>>>> On Tue, Oct 11, 2011 at 3:09 PM, Henry Minsky <hqm at alum.mit.edu> wrote:
>>>>> I can advise, although any memory of the details is rapidly fading.
>>>>>
>>>>> The current implentation tried to make an exact drop-in class that works
>>>>> like the venerable TextField, so it could be swapped into LzTextSprite with
>>>>> no changes to LzTextSprite.
>>>>>
>>>>> The embedding of fonts was handled by some calls in the compiler to emit
>>>>> Flex resource directives. I could try to help out on modifying some of those
>>>>> to take different args.
>>>>>
>>>>>
>>>>> On Tue, Oct 11, 2011 at 8:23 AM, Raju Bitter
>>>>> <r.bitter.mailinglists at googlemail.com> wrote:
>>>>>>
>>>>>> The current textfield implementation utilizing the TLF is limited in
>>>>>> how much of the FTE and TLE can be used. To have full TLF feature
>>>>>> support, OpenLaszlo would have to support OTF/CFF fonts - which the
>>>>>> platform does not do right now.
>>>>>>
>>>>>> Would Laszlo be interested in working with me on implementing full
>>>>>> FTE/TLE support in OpenLaszlo? The support I'd need would be
>>>>>>
>>>>>> 1) support for working on a spec for the new features (Amy?)
>>>>>> 2) a contact person with good knowledge of font handling in the AS3
>>>>>> runtime
>>>>>> 3) a QA resource for testing changes
>>>>>>
>>>>>> The ultimate goal is to have a the functionality for an RTE componen
>>>>>> in Flash using the TLF.
>>>>>>
>>>>>> - Raju
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Henry Minsky
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>