[cairo] PDF device origin?

[Behdad Esfahbod]

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Ian Britten wrote:
> Hi all,
> Is the device origin of the PdfSurface in the lower-left corner, or
> in the upper-left?
> For some reason, my data is coming out upside-down  :(  I've been
> assuming it was lower-left, but now I'm beginning to have doubts...
> 
> [ I'm pretty sure the user origin is always lower-left, independent
> of the Surface type being used, eh? ]

You're wrong.  It's always upper-left.

> On a related note, is there anything I can do with a
> cairo_matrix_t to flip my data (Top-to-bottom, not left-to-right)
> I didn't see any 'flip' type of functions available...

cairo_scale (cr, 1, -1);

You prolly also need a translate to the new origin before that.

> Thanks for any info!
> Ian


Have fun!

behdad
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