| Re: [AD] DO_PARALLELOGRAM_MAP again |
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On 2010-09-10, Elias Pschernig <elias.pschernig@xxxxxxxxxx> wrote:
> As can be seen in the failing [test scaled rotate 5][sw] unit test,
> parallelogram_map cannot draw things which exceed the range of an
> al_fixed, which is 32768. I suggested a few times already to move
> al_draw_bitmap et al. into the primitives addon and then use the polygon
> rasterizer in there for drawing rotated bitmaps, which has no such
> limitations. It is slower though.
If we're going to do that then I'd rather move more of the primitives
into the core.
> Other than that, I'm not really sure what to do. I'd hate to ship A5
> with an always failing unit test. Limiting to 32768 also is out of the
> question these days, I think some of my panoramic photographs are like
> 60000 pixels wide and I want to view them in my A5 programs :) Also
> scaling a typical screen of 1920x1200 zoomed 16x would go over the
> limit.
>
> The parallelogram_map code looks kinda unfixable to me, a #define which
> is several pages long with the worst kind of comments ("ugly hack", "i
> think the can never happen") and things like a commented out #ifdef
> where nobody knows what it was about. That code was written by Shawn for
> Allegro 1.0 a really long time ago I think so no surprise...
It was written by Sven Sandberg in 2001.
Peter