[SOLVED] Window Transparency

[Domingo Diego]

Hello

I think I might be doing this wrong as nobody has had this problem so far.
(Or maybe it's just not possible)

I'm trying to set the window's background color to be 0% Opaque.

However, when the window runs it runs at 100% Opacity regardless of what number I put in the 4th argument of the sf::Color's constructor.

Here's the code:

Code: [Select]

#include <SFML/Graphics.hpp>

int main()
{
sf::RenderWindow App(sf::VideoMode(800, 600), "Test", sf::Style::None);
App.SetFramerateLimit(600);

while (App.IsOpened())
{
sf::Event Event;
while (App.GetEvent(Event))
{
if (Event.Type == sf::Event::Closed)
App.Close();
}

App.Clear(sf::Color(0,0,0,0));

App.Display();
}

    return 0;
}

That creates a 800 x 600 frameless window that is, unfortunatly, black and completely opaque.

Am I doing this wrong? Is it not possible? (I did search, I couldn't find anyone asking this question...)

Edit:
I am using SFML 1.5

[Laurent]

You can't set the window's opacity like this. The fact that the OpenGL back buffer is transparent won't tell Windows to make the window transparent as well

Setting the window opacity would requires a new function, and is very OS-specific. It's not even supported by every OS.

[Domingo Diego]

Ah, I see.

Yeah, I worked up an ugly Windows API call to make the window transparent only to figure out I really didn't want it transparent after all.

I'll mark the post as [SOLVED] because you can set the window's transparency, but it's OS-Specific and it's sort of useless.

The solution is out there though if a person really wants a semi-transparent window that only works on Windows (There may be a Mac way, but that's still OS specific).

Thanks for the help!
Btw: Nice library