Andreas Kling e2c2a4c6d7 Painter: Add a fast path for draw_scaled_bitmap() with integer scale. ...

When both the x and y scale factors are integers, we can avoid a whole bunch
of the pixel lookups in the source image.

This makes 2x scaling a 320x200 bitmap another ~25% faster. :^)

2019-05-11 05:34:20 +02:00

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