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I'm completely lost after all these propositions.
1) Functions fl_push_matrix()/fl_pop_matrix() belong to the "Drawing complex shapes" API so they affect only that part of the drawing API. In contrast, the scaling factor affects all drawing functions. I don't see how a transient change of the scaling factor could be related to the transformation matrix of the "complex shapes" API.
2) Proposal for this function float fl_set_scale(float s);
involves two scaling factor values, the current one, and the new one, whereas in what has been programmed, the new value is always 1. I don't see how changing the scaling factor to another value makes sense. The goal is to allow working at the single pixel level. And only one value of the scaling factor is compatible with that, value 1.f.
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