Multi tool use

SDL memory leak

So I tryed to make something on SDL, but on first programm I have memory lear (idk leak or not) so there is some code:

#include <stdio.h>
#include <SDL.h>
#include <SDL_image.h>
#include <SDL_ttf.h>
#define SCREENSIZEX 180
#define SCREENSIZEY 300
SDL_Window* mainwind = NULL;
SDL_Renderer* rend = NULL;
TTF_Font* Usefont = NULL;

int main(int argc, char* argv)
{
SDL_Init(SDL_INIT_EVERYTHING);
Uint32 windowflags;
windowflags = SDL_WINDOW_SHOWN;
mainwind = SDL_CreateWindow("FooBar",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
SCREENSIZEX,
SCREENSIZEY,
windowflags);
rend = SDL_CreateRenderer(mainwind, -1, SDL_RENDERER_ACCELERATED);
SDL_SetRenderDrawColor(rend, 255, 255, 255, 255);
int imgFlags = IMG_INIT_PNG;
IMG_Init(imgFlags);
TTF_Init();
Usefont = TTF_OpenFont("DOTMBold.TTF",90);

SDL_Surface* TextSurf = NULL;
SDL_Texture* TextTexture = NULL;

SDL_Color UsingColor;
UsingColor.r=0;
UsingColor.g=255;
UsingColor.b=255;
UsingColor.a=100;

bool exit = false;
char Text[500];
int counter = 0;
SDL_Event evneet;
while(!exit)
{
SDL_PollEvent(&evneet);
SDL_RenderClear(rend);
counter++;
TextSurf = TTF_RenderUTF8_Blended(Usefont, Text, UsingColor);
TextTexture = SDL_CreateTextureFromSurface(rend, TextSurf);
SDL_FreeSurface(TextSurf);
TextSurf = NULL;
SDL_RenderCopy(rend, TextTexture, NULL, NULL);
TextTexture = NULL;
SDL_DestroyTexture(TextTexture);
SDL_RenderPresent(rend);
}
SDL_FreeSurface(TextSurf);
TextSurf = NULL;
SDL_DestroyTexture(TextTexture);
SDL_DestroyRenderer(rend);
SDL_DestroyWindow(mainwind);
SDL_Quit();
return 0;
}


Problem:
some screenshots

Idk how to fix this and tryed to do a lot of freeing and memory manipulations.
This programm do only one task. Just counting frames (in code only 0 displayed)
Its 3rd my try to make rendering and always i got the same.
Please help!

TextTexture

NULL

SDL_DestroyTexture

Text

SDL_PollEvent

1 Answer
1

This looks suspicious:

while(!exit)
{
...
TextTexture = SDL_CreateTextureFromSurface(rend, TextSurf);
...
TextTexture = NULL; // A
SDL_DestroyTexture(TextTexture); // B
...
}


SDL_DestroyTexture() doesn't get a valid handle here, but a NULL-Pointer is passed. You have to swap the lines A and B, so the Texture can be freed properly.

SDL_DestroyTexture()

NULL

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