Colors about gf HOT 8 CLOSED

Investigating this weird bug...

from gf.

I cannot reproduce your bug. I created a test case in tests/bugs/bug6.cc (in the develop branch) and it displays a gray text as expected. Could you give me a piece of code that does not work?

from gf.

This is my function to store a Color in a gf::Color4u :
m_mainMenuLabel.setColor(gf::Color::Grey(0.5f));

and this is my function to render the final text on screen :

void Label::render(gf::RenderTarget &target) {
    gf::Text text(m_text, m_font, m_characterSize);
    text.setPosition(m_position);
    text.setColor(m_color);
    target.draw(text);
}

from gf.

I found that using gf::Color::Grey() with a gf::Color4u isn't working.

from gf.

Your bug is here. You should use gf::Color4f and not gf::Color4u. When you assign a gray color to a gf::Color4u, there is an implicit conversion from float to uint8_t which results in 0.5f being 1 (or 0). And then, when you use it in setColor, there is another conversion from uint8_t to float so 1.0f (or 0.0f) which results in white or black.

from gf.

So to store a Grey value in a gf::Color4u, values should looks like { 150, 150, 150, 255} ?

from gf.

Use a gf::Color4f, that's the simplest way to do. Otherwise, you can use gf::Color::rgba() and gf::Color::convert() (in the develop branch, the names are ugly and may change in the future) to convert from one format to another.

from gf.

Okay okay, anyway, i wanted to switch to gf::Color4f, looks like a way more simplier.

from gf.