ColorWinDemo.exw

include std/machine.e

include EuSDL2.ew
include flags.e

if SDL_Init(SDL_INIT_EVERYTHING) = -1 then
	puts(1,"Failed to initialize SDL!\n")
	abort(0)
end if

atom win = SDL_CreateWindow("Use WASD keys to change background color",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,640,480,SDL_WINDOW_SHOWN)
atom ren = SDL_CreateRenderer(win,-1,SDL_RENDERER_ACCELERATED)

if win = -1 then
	puts(1,"Failed to create Window!\n")
	abort(0)
	elsif ren = -1 then
		puts(1,"Failed to create Renderer!\n")
		abort(0)
end if

atom rect = allocate(16)
poke4(rect,{50,50,100,100})

atom run = 1
atom key = 0

while run = 1 do
	
	SDL_PumpEvents()
	
	key = SDL_GetKeyboardState(key)
	
	if (peek(key+SDL_SCANCODE_ESCAPE) > 0) then
		run = 0
	end if
	
	if (peek(key+SDL_SCANCODE_W) > 0) then
		SDL_SetRenderDrawColor(ren,255,0,0,0) --red
		SDL_RenderFillRect(ren,rect)
		elsif (peek(key+SDL_SCANCODE_S) > 0) then
			SDL_SetRenderDrawColor(ren,0,255,0,0) --green
			SDL_RenderFillRect(ren,rect)
		elsif (peek(key+SDL_SCANCODE_A) > 0) then
			SDL_SetRenderDrawColor(ren,0,0,255,0) --blue
			SDL_RenderFillRect(ren,rect)
		elsif (peek(key+SDL_SCANCODE_D) > 0) then
			SDL_SetRenderDrawColor(ren,0,0,0,255) --alpha or back to blank
			SDL_RenderFillRect(ren,rect)
	end if
	
	SDL_RenderClear(ren)
	
	SDL_RenderPresent(ren)

end while

SDL_DestroyRenderer(ren)
SDL_DestroyWindow(win)

free(key)

SDL_Quit()
­12.36