Drawing text on an image and saving the image

[alexanderzhirov]

I'm trying to output text to an image. It is not possible to output text by coordinates (x,y) and after saving the image turns out to be mirrored and inverted. I don't understand what I'm doing wrong?

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#include <SFML/Graphics.hpp>

int main()
{
    sf::Font font;
    font.loadFromFile("SpaceGrotesk-Medium.ttf");
    sf::Text text;
    text.setFont(font);
    text.setString("Hello world");
    text.setCharacterSize(90);
    text.setFillColor(sf::Color::Red);


    sf::Texture img;
    img.loadFromFile("image.jpg");
    sf::Sprite sprite(img);

    sf::RenderTexture texture;
    texture.create(765, 480);
    texture.draw(sprite);
    texture.draw(text);

    texture.getTexture().copyToImage().saveToFile("new_file.jpg");

    return 0;
}

Before:



After:

[kojack]

Apparently after drawing into a render texture, you have to call it's .display() method, otherwise the texture is left in an undefined state and can appear upside down.

https://www.sfml-dev.org/documentation/2.5.1/classsf_1_1RenderTexture.php#af92886d5faef3916caff9fa9ab32c555

[alexanderzhirov]

Apparently after drawing into a render texture, you have to call it's .display() method, otherwise the texture is left in an undefined state and can appear upside down.

Yes, it's worked out now! Thanks!

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It remains to understand how to correctly output the text according to the coordinates I need?

[kojack]

The Text object has a setPosition() that works just like for sprites. It controls where the top left corner of the text will be placed (default is 0,0).