Messages

1

Graphics / Re: Draw pixels in real-time

« on: April 03, 2024, 04:17:38 pm »

Thank you very much for your help, everything is very clear. I will come back if needed.
Have a good day.

2

Graphics / Re: Draw pixels in real-time

« on: March 31, 2024, 07:18:20 am »

Sorry for the late reply. Thank you very much.
If I understand correctly, when I call renderTexture.getTexture(), the texture does not go back through the RAM; it stays on the graphics card, even if I use it to draw something else afterwards. Is that correct? And using an sf::RenderTexture would be the method that most closely resembles SDL, where everything is thought of in terms of pixel arrays, wouldn't it?
Another question. When using an sf::RenderTexture, what should the coordinates of the drawn vertices be for them to correspond properly to the points of the texture? If I'm not mistaken, an sf::Point vertex at (0.,0.) doesn't draw anything. Should the points be offset by 0.5 to hit the correct pixels?
I also did some tests with fragment shaders. Is the GLSL loaded by SFML portable across other platforms? For example, I code on macOS and I believe SFML uses OpenGL 2.1 in this environment. Will my shaders work on other platforms with more modern versions of OpenGL?
Thanks again for your help.
Have a good day.

3

Graphics / Draw pixels in real-time

« on: March 15, 2024, 02:33:46 pm »

Hello,
I'm looking to draw pixels in real-time with SFML, and I'm hesitating between sf::Image and sf::RenderTexture. What happens internally with these classes? What's the best practice between this,

sf::Image image;
image.create(1920, 1080);

image.setPixel(100, 200, sf::Color::Red);

sf::Texture texture;
texture.loadFromImage(image);
sf::Sprite sprite(texture);
window.clear();
window.draw(sprite);
window.display();
 

and that ?

sf::RenderTexture renderTexture;
renderTexture.create(1920, 1080);

renderTexture.clear();
sf::Vertex vertices[] = {sf::Vertex(sf::Vector2f(100, 200), sf::Color::Red)};
renderTexture.draw(vertices, 1, sf::Points);
renderTexture.display();

sf::Sprite sprite(renderTexture.getTexture());
window.clear();
window.draw(sprite);
window.display();
 

4

Window / full screen

« on: February 24, 2024, 05:55:15 pm »

Hello,
I cannot open a full screen window on MacBook M2 Pro. getFullscreenModes() returns nothing. What can I do?