Messages

1

Graphics / Re: texture NOT updating from window

« on: November 05, 2016, 10:27:38 pm »

Thank you Hapax and Mr_Blame for the explanations, deleting the display() call has solved the problem!

2

Graphics / (Solved!) texture NOT updating from window

« on: November 04, 2016, 03:15:46 pm »

Hello, I'm facing a problem of a sf::Texture NOT updating from sf::RenderWindow in SFML 2.4.
Here's the code example:

#pragma once

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

int main ()
{
        sf::RenderWindow window (sf::VideoMode (1280, 720), sf::String ("100%"));
        sf::Texture grassTexture;
        if (!grassTexture.loadFromFile ("grass.jpg", sf::IntRect (0, 0, 1280, 720)))
        {
                std::cout << "Could not load image" << std::endl;
                return -1;
        }

        sf::Sprite background (grassTexture, sf::IntRect { 0, 0, 1280, 720 });

        while (window.isOpen ())
        {
                sf::Event event;
                while (window.pollEvent (event))
                {
                        if (event.type == sf::Event::Closed)
                                window.close ();
                       
                        if (event.type == sf::Event::MouseButtonReleased &&
                                event.mouseButton.button == sf::Mouse::Left)
                        {
                                window.clear (sf::Color::White);
                                window.display ();
                                grassTexture.update (window, 0, 0);
                                sf::Image tmpImg = grassTexture.copyToImage ();
                                tmpImg.saveToFile ("tmp.jpg");

                                background = sf::Sprite (grassTexture);
                        }
                }

                window.clear (sf::Color::White);
                window.draw (background);
       
                window.display ();

                if (sf::Keyboard::isKeyPressed (sf::Keyboard::Escape))
                {
                        window.close ();
                }
        }

        return 0;
}
 

So after a left-click the texture should update with the white screen. I even save it to an image which shows that it's still the grass image loaded initially (it's attached) and not a white image.

The udpate() function description says:

    /// No additional check is performed on the size of the window,
    /// passing an invalid combination of window size and offset
    /// will lead to an undefined behavior.
    ///
    /// This function does nothing if either the texture or the window
    /// was not previously created.
 

These both are not the case as you can see.

I'm looking forward to any help.