Add optional bindings for SDL2_gfx #22
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The
SDL2_gfxlibrary provides the basic drawing functions such as circles or triangles against renderers of SDL2.This PR adds optional bindings for SDL2_gfx and closes #20.
While the library provides support functions for other concerns (such as framerate control), only graphics related functions are binded in
src/lib_gfx.cr.src/gfx.crdefines 3 new shapes (Circle,EllipseandTriangle) underSDLnamespace and defines new drawing methods forSDL::Renderer.I added the
samples/gfx.crexample which showcase the new drawing methods.