Re: [DerelictSDL] SDL_RenderCopy does not accept optional arguements when written in a file aside from main

[Lucien via Digitalmars-d-learn]

On Thursday, 24 December 2015 at 09:41:39 UTC, Jack wrote:
So I have separated my texture rendering methods in another 
file and have run into a problem hence the title name.

#main.d
----------

void render()
{
SDL_RenderClear(renderTarget);
renderSprite(renderTarget);
SDL_RenderPresent(renderTarget);
}
----------
#other_file.d
-----------
void renderSprite(SDL_Renderer _renderTarget)
{

SDL_Texture texture = 
SDL_CreateTextureFromSurface(_renderTarget, 
IMG_Load("image.png"));

SDL_RenderCopy(_renderTarget,texture, null,null);
}
----------

Error: cannot implicitly convert expression (null) of type 
typeof(null) to SDL_Rect
Error: cannot implicitly convert expression (null) of type 
typeof(null) to SDL_Rect

=====================
But when I do this:

#main.d
-------------------

void render()
{
SDL_RenderClear(renderTarget);
SDL_RenderCopy(renderTarget,texture,null,null);
SDL_RenderPresent(renderTarget);
}
--------------------

It works with no problem. I've DerelictSDL2.load and SDL_Init 
already.
So is this a bug or am I doing something wrong here?

You need a pointer to renderTarget.


#other_file.d

---------------------
module my.sdl.project;

import derelict.sdl2.sdl;
import derelict.sdl2.image;


void renderSprite(SDL_Renderer* _renderTarget)
{
    SDL_Texture* texture = 
SDL_CreateTextureFromSurface(_renderTarget, 
IMG_Load("image.png"));
    SDL_RenderCopy(_renderTarget,texture, null,null);
}
---------------

#main.d
-----------

import my.sdl.project;
//...
-----------