OpenEuphoria

Re: Help Solving SDL2 Wrapper Example

• Posted by Icy_Viking Sep 24, 2017
• 1759 views

xSDL_CreateRenderer = define_c_func(sdl2,"SDL_CreateRender",{C_POINTER,C_INT,C_UINT},C_POINTER) 

xSDL_CreateRenderer = define_c_func(sdl2,"SDL_CreateRenderer",{C_POINTER,C_INT,C_UINT},C_POINTER) 

Yes it does. Thank you. The solution was so simple.

OK, need help with one more. I get the same error as before, but I don't see any typos in this one.

-Wrapper Code

xSDL_BlitSurface = define_c_func(sdl2,"SDL_BlitSurface",{C_POINTER,C_POINTER,C_POINTER,C_POINTER},C_INT) 
 
public function SDL_BlitSurface(atom src,atom srcr,atom dst,atom dstr) 
 
 return c_func(xSDL_BlitSurface,{src,srcr,dst,dstr}) 
	 
end function 

-Example

--Demo currently not working 
include std/machine.e 
include EuSDL2.ew 
include flags.e 
 
atom width = 800, height = 600 
atom buffer,format 
atom x 
x = SDL_Init(SDL_INIT_EVERYTHING) 
 
if x = -1 then 
	puts(1,"Failed to load initialize SDL!\n") 
	abort(0) 
end if 
 
atom win = SDL_CreateWindow("Window Image",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,width,height,SDL_WINDOW_SHOWN) 
 
if win = -1 then 
	puts(1,"Failed to create window!\n") 
	abort(0) 
end if 
 
atom surf = SDL_GetWindowSurface(win) 
 
atom img = SDL_LoadBMP("SDL.bmp") 
 
if img = -1 then 
	puts(1,"Failed to load image!\n") 
	abort(0) 
end if 
 
procedure calc_rect(atom rect,integer sx,integer sy,integer tx,integer ty) 
 
 poke4(rect,sx) 
 poke4(rect+2,sy) 
 poke4(rect+4,tx) 
 poke4(rect+6,ty) 
	 
end procedure 
 
atom srect = allocate(10) 
atom drect = allocate(10) 
 
calc_rect(srect,0,0,100,100) 
calc_rect(drect,0,0,100,100) 
 
format = peek4u(surf+4) 
buffer = SDL_ConvertSurface(surf,format,0) 
 
x = SDL_BlitSurface(img,srect,surf,drect) 
 
if x = 0 then 
	puts(1,"Failed to blit image!\n") 
	abort(0) 
end if 
 
SDL_UpdateWindowSurface(win) 
 
SDL_Delay(3000) 
 
SDL_FreeSurface(img) 
SDL_FreeSurface(surf) 
 
SDL_DestroyWindow(win) 
 
SDL_Quit()