How to disable linear interpolation / smoothing / anti-aliasing when drawing an image in Cairo?
I want to draw a low-resolution image onto another surface in Cairo with upscaling. For instance, I have a 2x3 image which looks like this when zoomed in:
Drawing this image onto another surface with a zoom level of 10 results in:
The rendering code closely follows this example, i.e., all surface/context settings are at default. Apparently, Cairo applies some interpolation by default. What I want is to keep the blocky/pixelated look of the original image.
How can I control the type of interpolation in Cairo? In other libraries, there are commonly options to set interpolation to from cubic over linear to nearest. Is there an equivalent in Cairo?
I think you might be looking for something like cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);. This call would be done after cairo_set_source_surface().
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