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Help => Graphics => Topic started by: Bertrahm on December 02, 2019, 06:54:13 pm

Title: Assertion Failed when trying to load Texture
Post by: Bertrahm on December 02, 2019, 06:54:13 pm

Hey,
im farely new to SFML and im having trouble when loadiong Textures. Im getting an Assertion Failed.
here's the message;

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Assertion failed!

Program: D:\Workspace\C++\Game-Dev\Hexagon Game Engine\bin\Debug\Hexagon Game Engine.exe
File: D:\Programming\C++\Releases\_Sources\SFML\src\SFML\Window\GlContext.cpp, Line 416

Expression: sharedContext != NULL

Heres the class where I call the load texture:

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Quote

#include "SpriteLoader.hpp"
#include <iostream>

using namespace std;
using namespace Hexagon;

string SpriteLoader::ResourceLocation;

// Constructor for Spriteloader class
SpriteLoader::SpriteLoader(string ResourceLocation) {
    InitSpriteLoader(ResourceLocation);
}

// Deconstructor for Spriteloader class
SpriteLoader::~SpriteLoader() {}

// Initialization Method
void SpriteLoader::InitSpriteLoader(string ResourceLocation) {
    cout << "HE: SpriteLoader: Initializing..." << endl;

    SpriteLoader::ResourceLocation = ResourceLocation;
}

// Method for loading/creating a Sprite
void SpriteLoader::LoadSprite(string name) {
    sf::Texture texture = LoadTexture(name);
}

// Method for loading Textures
sf::Texture SpriteLoader::LoadTexture(string name) {
    sf::Texture texture;

    if(!texture.loadFromFile(GetResourceLocation()+"/"+name)) {
        cout << "[ERROR]HE: SpriteLoader: Texture failed to load! (" << name << ")" << endl;
    }
}

// Method for getting "ResourceLocation"
string SpriteLoader::GetResourceLocation() {
    return SpriteLoader::ResourceLocation;
}

(LoadSprite calls LoadTexture, which really loads the texture)
And heres the class for my Window Creation and where I call the LoadSprite Function:

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Quote

#include "HexagonEngine.hpp"
#include <iostream>

using namespace Hexagon;
using namespace std;
SpriteLoader* Engine::spriteLoader;

Engine::Engine(int WIDTH, int HEIGHT, char* TITLE) {
    Engine::initHexagonEngine(WIDTH, HEIGHT, TITLE);
}
Engine::~Engine() {}

void Engine::initHexagonEngine(int WIDTH, int HEIGHT, char* TITLE) {
    cout << "HE: Initializing"            << endl;

    spriteLoader = new SpriteLoader("src/HexagonEngine/defaultRes");
    spriteLoader->LoadSprite("MissingTexture.png");

    cout << "HE: Creating new sf::Window" << endl;
    Engine::hexWindow.create(sf::VideoMode(WIDTH, HEIGHT), TITLE); // Create new sf::RenderWindow

    cout << "HE: Initializing finished." << endl;
}

// Method Runs GameLoop
void Engine::Start() {
    cout << "HE: Starting GameLoop" << endl;

     // Gameloop
    while(hexWindow.isOpen()) {
        sf::Event event;

        while(hexWindow.pollEvent(event)) { // Run this loop aslong as there are window events
            if (event.type == sf::Event::Closed) { // Execute any requested events
                hexWindow.close();
            }
        }

        Update();
        FixedUpdate();
        Render();
    }
}

void Engine::Update() {}
void Engine::FixedUpdate() {}

// Render Function is called every go through of the gameloop
void Engine::Render() {
    hexWindow.clear(sf::Color::Magenta);
    hexWindow.display();
}

It fails at window creation, but as soon as I remove the LoadSprite call it doesnt fail anymore and the other way arround

Title: Re: Assertion Failed when trying to load Texture
Post by: Laurent on December 02, 2019, 08:23:07 pm

Do you declare your Engine instance at global scope? Within main()? Somewhere else?

Title: Re: Assertion Failed when trying to load Texture
Post by: eXpl0it3r on December 02, 2019, 08:31:01 pm

As mentioned on Discord, your LoadTexture function isn't returning anything.

// Method for loading Textures
sf::Texture SpriteLoader::LoadTexture(string name) {
    sf::Texture texture;

    if(!texture.loadFromFile(GetResourceLocation()+"/"+name)) {
        cout << "[ERROR]HE: SpriteLoader: Texture failed to load! (" << name << ")" << endl;
    }
}

Not even sure how this code is compiling for you.