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Transparent windows on macOS are opaque #6330

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rparrett opened this issue Oct 21, 2022 · 1 comment
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Transparent windows on macOS are opaque #6330

rparrett opened this issue Oct 21, 2022 · 1 comment
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A-Rendering Drawing game state to the screen A-Windowing Platform-agnostic interface layer to run your app in C-Bug An unexpected or incorrect behavior O-MacOS Specific to the MacOS (Apple) desktop operating system

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@rparrett
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rparrett commented Oct 21, 2022 •
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Bevy version

main

What you did

run the transparent_window example

What went wrong

window is not transparent

Additional information

Related to gfx-rs/wgpu#687

This can be "worked around" by setting alpha_mode to CompositeAlphaMode::PostMultiplied instead of CompositeAlphaMode::Auto (in bevy 0.9-dev+). I'm not sure what the other implications of doing that are.

See also a similar issue on linux: #5779
@rparrett rparrett added C-Bug An unexpected or incorrect behavior A-Rendering Drawing game state to the screen A-Windowing Platform-agnostic interface layer to run your app in O-MacOS Specific to the MacOS (Apple) desktop operating system labels Oct 21, 2022
@aprchen
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aprchen commented Nov 24, 2022

Thanks, this worked for me

This can be "worked around" by setting alpha_mode to CompositeAlphaMode::PostMultiplied instead of CompositeAlphaMode::Auto (in bevy 0.9-dev+). I'm not sure what the other implications of doing that are.

@rparrett rparrett mentioned this issue Feb 11, 2023
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@bors bors bot closed this as completed in 57bf771 Mar 4, 2023
Shfty pushed a commit to shfty-rust/bevy that referenced this issue Mar 19, 2023
@mockersf @Shfty
Transparent window on macos (bevyengine#7617)
50544d6 
# Objective

- Example `transparent_window` doesn't display a transparent window on macOS
- Fixes bevyengine#6330

## Solution

- Set the `composite_alpha_mode` of the window to the correct value
- Update docs
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A-Rendering Drawing game state to the screen A-Windowing Platform-agnostic interface layer to run your app in C-Bug An unexpected or incorrect behavior O-MacOS Specific to the MacOS (Apple) desktop operating system
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[Merged by Bors] - Transparent window on macos mockersf/bevy
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@rparrett @aprchen