Console black until it is moved

[SpaceCadetEve]

I am trying to run the same code given in https://python-tcod.readthedocs.io/en/latest/tcod.html. When I run it, the console is black. When I move the console window, "Hello, world" appears.

I am running MacOS Mojave and Python 3.7.1.

[HexDecimal]

I can't reproduce this on Windows. I speculate that the issue might be caused by sleeping rather than waiting for an event.

You could try replacing the sleep with tcod.console_wait_for_keypress(False).

If that doesn't work then you could use a different renderer for tcod.console_init_root such as tcod.RENDERER_OPENGL2, renderers are listed here.

The tcod.FONT_LAYOUT_ASCII_INROW flag is wrong and will be removed.

[SpaceCadetEve]

I need to make a correction (I’ve been trying a handful of things to see what works).
When I run what is on that page, and I run “python3 engine.py”, it never shows a screen at all.

I used a modified version of the code at http://www.rogueliketutorials.com/libtcod/1

`import tcod

def main():
screen_width = 80
screen_height = 50

tcod.console_set_custom_font(
    'dejavu16x16_gs_tc.png',
    tcod.FONT_TYPE_GRAYSCALE | tcod.FONT_LAYOUT_TCOD,
)

root_console = tcod.console_init_root(screen_width, screen_height, 'tcod tutorial revised', False)

while True:
    root_console.clear()

    root_console.print_(10,10, "hello, world")

    tcod.console_flush()

    key = tcod.console_check_for_keypress()

    if key.vk == tcod.KEY_ESCAPE:
        return True

`
When I run this, the screen shows up, but is black.

[SpaceCadetEve]

Oh, and I tried the different render modes and they either caused a crash (probably because those aren't available) or had the same effect

[HexDecimal]

Your code looks correct.

Be sure to change the default background color, example: root_console.default_bg = (0,0,255) in case that gives you something other than a black background.

All renderer modes should work on a modern computer. If there's something in libtcod causing the issue then it'd be useful if I knew which renderers were crashing.

[HexDecimal]

I've tracked the issue down to SDL2, version 2.0.9 fixes this issue, so I'll get it updated.

[HexDecimal]

tcod 8.1.0 should fix the issue. SDL2's changelog was very specific:

Mac OS X:
* Fixed black screen at start on Mac OS X Mojave

[SpaceCadetEve]

I can verify that it is fixed in 8.1.1. Thanks!