[SOLVED]Can't load a background

[denisonl]

Hello! I can't load a background for a window. That's my code:

#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>

int main()
{
    // Create the main window
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");
    while (window.isOpen())
    {
        // Process events
        sf::Event event;
        sf::Image image;
        image.loadFromFile("texture.png");

        sf::Texture texture;
        texture.update(image);
        sf::Sprite sprite;
        sprite.setTexture(texture);
        window.draw(sprite);

        while (window.pollEvent(event))
        {
            // Close window: exit
            if (event.type == sf::Event::Closed)
                window.close();
        }

       
        // Clear screen
        window.clear();
        // Update the window
        window.display();
    }
    return EXIT_SUCCESS;
}

What did I do wrong? Thank you

[victorlevasseur]

You need to draw the sprite between the clear and display statements.

By the way, you don't need to load the texture every frame. Just load it before the "while".

[denisonl]

I've done what you said, but there is no result. Only black window

#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
int main()
{
    // Create the main window
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");
    sf::Image image;
    image.loadFromFile("texture.png");

    sf::Texture texture;
    texture.update(image);
    sf::Sprite sprite;
    sprite.setTexture(texture);
    while (window.isOpen())
    {
        // Process events
        sf::Event event;
        while (window.pollEvent(event))
        {
            // Close window: exit
            if (event.type == sf::Event::Closed)
                window.close();
        }
       
        // Clear screen
        window.clear();
        window.draw(sprite);
        // Update the window
        window.display();
    }
    return EXIT_SUCCESS;
}

[Stellaris]

Maybe the "texture.png" doesn't exists (typo ?)
Check the image was correctly loaded with the return value of loadFromFile

[eXpl0it3r]

Is the image loaded successfully? Make sure to always check that. You can btw. load an image directly on a texture.

Also make sure to use the [code=cpp][/code] tags on the forum for code formatting.

[denisonl]

Maybe the "texture.png" doesn't exists (typo ?)
Check the image was correctly loaded with the return value of loadFromFile

File exists, return value of loadFromFile is 1 (true)

[Hapax]

You aren't creating the texture before attempting to update it with the content of the image.
"This function does nothing if the texture was not previously created." - sf::Texture::update(sf::Image) documentation

You could create the texture first or just "load" the texture from the image:

sf::Texture texture;
if (!texture.loadFromImage(image))
    return EXIT_FAILURE;

Simpler still, you can skip the sf::Image completely if you don't need to do any image processing and load directly into the texture from the file:

sf::Texture texture;
if (!texture.loadFromFile("texture.png"))
    return EXIT_FAILURE;

[denisonl]

Thank you very much! I've done it