Alberto

`BLEND_OVERLAY` flag

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**Description** We've had an essential number of blend modes available for a long time, which are: `MAX` `MIN` `ADD` `SUB` `MULT` While these flags can be combined together to achieve...

Recent updates in #2382, #2565 and #2566 have improved the speed of Surface.fill calls when using the `ADD`, `SUB` `MULT`, `MIN` and `MAX` blend flags. However, there’s still a fundamental...

Closes part of #225.

Similar to Rect's https://pyga.me/docs/ref/rect.html#pygame.Rect.move_to.

This PR tries to simplify and improve geometry docs a bit. **What I tried to achieve:** - Lessen word repetition - Remove obvious statements - Remove self references when describing...

Condense `SDL_PixelFormat` copy code in `pgSurface_Blit()`

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This PR tries to make code more compact, legible and not dependant on SDL versions. Not completely sure this will work though.

A way to replace multiple Surface colors

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With the recent addition of `transform.hsl()` (#2398) we now have 5 ways to interact with pixels from a surface, that are: - `Surface.get_at()` / `Surface.set_at()` - `Surface.blit()` with different blend...

Add `index_from` argument to `collidelistall` methods

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Currently the `Rect`'s (and soon `Circle`'s) collidelistall methods return a list of indices of colliding objects. While this is very useful as an optimization over raw python looping (and generally...

Added `geometry.Line` base

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This pull request adds the `Line` class to the `pygame.geometry` module. It also adds the xa, ya, xb, yb, a, b attributes, str functionality (for printing), and the copy method....

Possibly unreachable blit code

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Alongside the many blitters in Pygame, we have a function called `alphablit_colorkey`: [`alphablit_colorkey` implementation](https://github.com/pygame-community/pygame-ce/blob/1c2e7526830ba35594ef7ff59354f725b3244e73/src_c/alphablit.c#L2448). It seems this blitter should be used with a surface that has both an alpha channel...