Re: [AD] al_convert_bitmap

[Trent Gamblin <trent@xxxxxxxxxx>]

Just my 2c, but I don't really like auto or especially forced anything. There should be a way to say I want video only or memory only and never convert my bitmaps (apologize if I am out of touch but I haven't followed the thread closely).

On 2011-06-09, at 10:22 AM, Matthew Leverton <meffer@xxxxxxxxxx> wrote:

>> One thing which needs thought is when i call al_load_bitmap with the
>> new VIDEO flag - it will return NULL and I'd have to load the same
>> bitmap a second time.
>> 
> Then why request a video bitmap if you don't really want one?
> 
> What if there is a display present, you have VIDEO set and it fails
> because it's too big? You currently have to manually check and create
> a memory bitmap.
> 
> Allegro has a split personality regarding this. If you try to create a
> huge bitmap before a display, it will happily create a memory bitmap
> of that size. It will later then try to convert it and fail. But if
> you create that same bitmap after a display, it will return null.
> 
> This is why there should be three types that the program can request:
> 
> any: try video first, then memory. It does this even if there is an
> active display. default behavior.
> video: only try video. If no display, then this fails immediately.
> memory: only try memory.
> 
> If we auto convert, then the "any" bitmaps would auto convert at
> display creation. Since it would be the default flag (0), bitmap
> creation would generally always succeed and always end up video
> bitmaps after a display is created. (Also any "video" bitmaps that
> were downgraded to "memory" due to previous display being destroyed
> would also be converted.)
> 
> I don't mind if auto-conversion is the default behavior, but I would
> make it optional and keep the convert-all function around. i.e.:
> 
> al_set_new_display_flags(ALLEGRO_AUTO_UPLOAD_BITMAPS, 0); // defaults to 1
> 
> Now the average user is happy because he doesn't know any better, and
> the more advanced can still explicitly say when and where to convert
> the bitmaps.
> 
> And I think tags can be useful, but I agree that the user could just
> manage that themselves. Probably better that way since Allegro doesn't
> normally get too high level like that.
> 
> --
> Matthew Leverton
> 
> ------------------------------------------------------------------------------
> EditLive Enterprise is the world's most technically advanced content
> authoring tool. Experience the power of Track Changes, Inline Image
> Editing and ensure content is compliant with Accessibility Checking.
> http://p.sf.net/sfu/ephox-dev2dev
> -- 
> https://lists.sourceforge.net/lists/listinfo/alleg-developers