Nimterop SDL2 wrapper

sdl2.nim

## An SDL2 wrapper using nimterop.

import os

import nimterop/build
import nimterop/cimport

const
  Base = getProjectCacheDir("sdl2")

setDefines(@[
  "SDLStd"
])

getHeader("SDL2/SDL.h",
          giturl = "https://github.com/SDL-mirror/SDL",
          dlurl = "http://libsdl.org/release/SDL2-$1.zip",
          outdir = Base,
          altNames = "SDL2")

cPlugin:
  import strutils

  const NoPrefixStripping = [
    "SDL_bool", "SDL_floor"
  ]

  proc onSymbol*(sym: var Symbol) {.exportc, dynlib.} =
    sym.name = sym.name.replace("__", "_").strip(chars = {'_'})
    if sym.name notin NoPrefixStripping:
      sym.name.removePrefix("SDL_")
    if sym.name.startsWith("GL") and sym.kind == nskType:
      sym.name[0..1] = "gl"
    if sym.name.endsWith("Event") or sym.name.endsWith("Update") or
       sym.name == "Quit":
      sym.name.insert("X", 0)

cOverride:
  type
    BlitMap = pointer
    HapticDirection = object
      `type`: uint8
      dir: int32
    RWops = pointer
    GameControllerAxis = enum
      CONTROLLER_AXIS_INVALID
      CONTROLLER_AXIS_LEFTX
      CONTROLLER_AXIS_LEFTY
      CONTROLLER_AXIS_RIGHTX
      CONTROLLER_AXIS_RIGHTY
      CONTROLLER_AXIS_TRIGGERLEFT
      CONTROLLER_AXIS_TRIGGERRIGHT
      CONTROLLER_AXIS_MAX
    GameControllerButton = enum
      CONTROLLER_BUTTON_INVALID
      CONTROLLER_BUTTON_A
      CONTROLLER_BUTTON_B
      CONTROLLER_BUTTON_X
      CONTROLLER_BUTTON_Y
      CONTROLLER_BUTTON_BACK
      CONTROLLER_BUTTON_GUIDE
      CONTROLLER_BUTTON_START
      CONTROLLER_BUTTON_LEFTSTICK
      CONTROLLER_BUTTON_RIGHTSTICK
      CONTROLLER_BUTTON_LEFTSHOULDER
      CONTROLLER_BUTTON_RIGHTSHOULDER
      CONTROLLER_BUTTON_DPAD_UP
      CONTROLLER_BUTTON_DPAD_DOWN
      CONTROLLER_BUTTON_DPAD_LEFT
      CONTROLLER_BUTTON_DPAD_RIGHT
      CONTROLLER_BUTTON_MAX
    GameControllerButtonBind = GameControllerButton
    Haptic = pointer

cImport(SDLPath, recurse = true, dynlib = "SDLLPath")