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1

Graphics / why screenshot weight more than original picture? and why i get black image?

« on: July 08, 2016, 10:01:19 pm »

image weight

(click to show/hide)

//this program open "image.png" and save screenshot "screenshot.png"
//to make screenshot press left arrow
#include <SFML/Graphics.hpp>

int main()
{
sf::Texture texture;
if (!texture.loadFromFile("image.png")){return 0;}

//windows size = texture size because i want to copy whole image

sf::Vector2u WindowSize = texture.getSize();
sf::RenderWindow window(sf::VideoMode(WindowSize.x,WindowSize.y), "SFML works!",sf::Style::Close);

sf::Image screenshot;

sf::Sprite sprite;
sprite.setTexture(texture);




    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();

            if (sf::Mouse::isButtonPressed(sf::Mouse::Left))
                {
                screenshot = window.capture();
                screenshot.saveToFile("Screenshot.png");
                }
        }



 window.clear(sf::Color::Transparent);
 window.draw(sprite);
 window.display();
    }
    return 0;
}

black image + if you minimize a window it turns black or white

(click to show/hide)

int main()
{
sf::Texture texture;
if (!texture.loadFromFile("image.png")){return 0;}

//windows size = texture size because i want to copy whole image

sf::Vector2u WindowSize = texture.getSize();
sf::RenderWindow window(sf::VideoMode(WindowSize.x,WindowSize.y), "SFML works!",sf::Style::Close);

sf::Image screenshot;

sf::Sprite sprite;
sprite.setTexture(texture);


 window.clear(sf::Color::Transparent);
 window.draw(sprite);
 window.display();

screenshot = window.capture();                  //<<<<<<<<<<
screenshot.saveToFile("Screenshot.png");        //<<<<<<<<<<

    return 0;
}

i tested it on this image https://en.wikipedia.org/wiki/Portable_Network_Graphics#/media/File:PNG_transparency_demonstration_1.png
original: 214 KB
screenshot: 330KB

2

Network / Can sfml open Port (computer networking) in firewall?

« on: February 24, 2016, 06:38:38 pm »

Can sfml open ports?

3

Feature requests / function to create/delete/take list directory contents of folder

« on: February 08, 2016, 06:08:20 pm »

it would be useful to manage files. I think it will make game more portable(find save files and etc).