[cairo] CAIRO_FORMAT_A1 image source color

[Uli Schlachter]

On 01.04.2014 19:32, sthustfo wrote:
> But still unable to identify where in png routines, the data is converted
> to monochrome? The data returned by cairo_image_surface_get_data() is all
> 0xff's. Any pointers would be appreciated.

If you really want monochrome, use CAIRO_FORMAT_RGB24.

If you want to interpret CAIRO_FORMAT_A1: The "1" means "one bit per pixel". So
a byte containing 0xff would mean 8 pixels with full alpha aka "opaque".

Uli
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