Texture stops updating midway through

[yuxuwu]

Hello,

I'm new to SFML so I've been stuck on this for a little while now, but it seems like the texture for my sprite only loads midway through. I want to display a 2D array of pixels to a window, so I wanted to see if I could fill up an entire window with a solid color as a test.
Here's a snippet of my code:

 
    sf::RenderWindow window(sf::VideoMode(WINSIZE_X, WINSIZE_Y), "My Window");
    sf::Sprite sprite;
    sf::Texture texture;
    sf::Uint8 *pixels = new sf::Uint8[WINSIZE_X * WINSIZE_Y * 4];

    if (!texture.create(WINSIZE_X, WINSIZE_Y)) {
        std::cout << "Error: texture could not be created" << std::endl;
    }

    while(window.isOpen()) {
        //Update texture
        for(int y = 0; y < WINSIZE_Y; y++) {
          for(int x = 0; x < WINSIZE_X; x++) {
            pixels[(y*WINSIZE_X)+(4*x)]       = 255; // R
            pixels[(y*WINSIZE_X)+(4*x)+1]     = 255; // G
            pixels[(y*WINSIZE_X)+(4*x)+2]     = 0; // B
            pixels[(y*WINSIZE_X)+(4*x)+3]     = 200; // A
          }
        }
        texture.update(pixels);

        //Update sprite with texture
        sprite.setTexture(texture);

        //Clear window
        window.clear(sf::Color::Black);

        //Draw everything
        window.draw(sprite);
        window.display();
    }
 

WINSIZE_X and WINSIZE_Y are defined as 800 and 600 respectively.

Sorry if this is a stupid question, but thanks in advanced for any assistance!

[Laurent]

it seems like the texture for my sprite only loads midway through

What does that mean? Can you show a screenshot?

[texus]

Every line contains WINSIZE_X pixels and 4 bytes per pixel. You are correctly multiplying x by 4, but forgot to also multiply WINSIZE_X by 4.
E.g. the second line starts at byte 3200 and not at byte 800, thus the pixels should be set like this:

pixels[(y*WINSIZE_X*4)+(4*x)]       = 255; // R
pixels[(y*WINSIZE_X*4)+(4*x)+1]     = 255; // G
pixels[(y*WINSIZE_X*4)+(4*x)+2]     = 0; // B
pixels[(y*WINSIZE_X*4)+(4*x)+3]     = 200; // A

[yuxuwu]

Thank you! The fix seemed to do the trick. Can't believe that flew over my head.