taskGnash - The GNU Flash player - Tasks: task #7430, Add support for the _quality...


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task #7430: Add support for the _quality property of a movie

Submitter:  Sandro Santilli <strk>
Submitted:  Wed 31 Oct 2007 10:08:27 AM UTC
Should Start On:  Tue 30 Oct 2007 11:00:00 PM UTC Should be Finished on:  Tue 30 Oct 2007 11:00:00 PM UTC
Category:  None Priority:  5 - Normal
Status:  In Progress Privacy:  Public
Assigned to:  None Percent Complete:  30%
Open/Closed:  Open Effort:  0.00

Sun 18 Jan 2009 09:09:43 PM UTC, comment #5: 

There are 4 quality levels in flash, and this is what we're going to use for the interface. Each renderer should be free to interpret the quality as it likes. I'm looking at AGG, though I'm not sure how far I'll get. I'm not going to look at Cairo or OGL.

movie_root controls the quality (because it's a Global AS property) so the GUI will have to use its _stage member to control it.

Benjamin Wolsey <bwy>
Group Member
Thu 29 May 2008 04:05:47 PM UTC, comment #4: 

Not so fast; I didn't yet implement that for Cairo. I started on the renderer interface first.

Cairo has three anti-aliasing methods: none, better, best. With OpenGL there's none, simple, good (accum), best (multisample). With AGG I believe there's only one type of anti-aliasing.

All renderers can tweak their bezier curve interpolation. So we'd likely want to use some sort of predefined combination of interpolation accuracy and anti-aliasing type for _quality.

Bastiaan Jacques <bjacques>
Group Member
Thu 29 May 2008 02:22:47 PM UTC, comment #3: 

I belive bastiaan implemented optional antialiasing for cairo.
Bastiaan, feel like designing an interface for render_handler
to set that ? Does cairo implement multi-level setting for it ?
(flash quality can be low/medium/high IIRC)

Sandro Santilli <strk>
Group Member
Tue 18 Mar 2008 07:41:54 AM UTC, comment #2: 

The first step can easily be done using the interfaceEventCallback. I might add that this afternoon (so the log_unimpl moves to gui).

Benjamin Wolsey <bwy>
Group Member
Sun 25 Nov 2007 04:32:10 AM UTC, comment #1: 

What exactly would be controlled by this property?

Two things immediately come to mind:
1) Anti-aliasing methods;
2) Bezier curve interpolation accuracy.

Bastiaan Jacques <bjacques>
Group Member
Wed 31 Oct 2007 10:08:27 AM UTC, original submission:  

This means:

- Adding an interface to render_handler to change quality
- Adding an interface to Gui to change quality (which would trigger redisplay)
- Adding a Gui reference in the core to signal quality change, or have the Gui query the quality on each ::display call...

Sandro Santilli <strk>
Group Member


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    Date Changed by Updated Field Previous Value => Replaced by
    2009-01-18 bwy StatusNone In Progress
        Percent Complete0% 30%

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