Milkdrop 1.4 presets or only some effects render upside down

[kblaschke]

After the renderer rewrite for 4.1, due to the way how presets need to be rendered to circumvent the Y coordinate flip between DirectX and OpenGL, presets not using any shaders at all will be drawn upside down and not flipped before being displayed. After applying any configured old-school filters, a final draw flipping the image should be performed.

A few presets have mismatching locations for some effects, where custom waves do not match the shape positions while they obviously should. In these occasions it looks like not all effects are correctly drawn properly Y-flipped.

Some presets with this issue can be found in the upside down.zip archive.