residualvm/residualvm — pull request #791 by inguin (2013-12-18 21:57:54+00:00)
Title: EMI: Flip y coordinate when creating screenshot textures

The MakeScreenTextures() opcode is used to create texture tiles from the
current screen content for use with an overworld actor, e.g. when fading over
the slides in the intro. With OpenGL the created textures were mirrorered in
y direction because OpenGL uses a different coordinate system where (0, 0)
is the bottom left corner.