Tooltip flicker alpha on redraw #56752

New Issue

Campbell Barton · 2018-09-11T05:34:45+02:00

Campbell Barton commented

2018-09-11 05:34:45 +02:00

Using the toolbar, move your cursor over the buttons until tooltips show, as you move your cursor, notice the outline and shadow flickers.

As well as this the alpha of the tooltip changes.

In 58a8277098 this is also an issue with the redo panel.

I've looked into this bug and am quite sure its related to the way buttons draw with a batch cache, since replacing the draw calls using UI_draw_roundbox_4fv doesn't have the problem.

Using the toolbar, move your cursor over the buttons until tooltips show, as you move your cursor, notice the outline and shadow flickers. As well as this the alpha of the tooltip changes. In 58a8277098 this is also an issue with the redo panel. I've looked into this bug and am quite sure its related to the way buttons draw with a batch cache, since replacing the draw calls using `UI_draw_roundbox_4fv` doesn't have the problem.

Campbell Barton commented

2018-09-11 05:34:45 +02:00

Added subscriber: @ideasman42

Clément Foucault was assigned by Campbell Barton

2018-09-11 05:35:02 +02:00

Roger B commented

2018-09-11 21:24:57 +02:00

Added subscriber: @rboxman

Roger B commented

2018-09-11 21:24:57 +02:00

Here's a gif showing the flicker in case a repro is hard to see -- happens on my 2 Win10 machines, 1 with nVidia Quadro and 1 with AMD fire pro

Here's a gif showing the flicker in case a repro is hard to see -- happens on my 2 Win10 machines, 1 with nVidia Quadro and 1 with AMD fire pro ![flicker.gif](https://archive.blender.org/developer/F4668013/flicker.gif)

Clément Foucault commented

2018-09-11 21:30:51 +02:00

@rboxman Thanks, I can repro now.

Campbell Barton commented

2018-09-11 21:51:58 +02:00

@fclem, note: checking over the code it seems the use-case for optimized button drawing is quite different to tooltip backdrop where it's not really such an advantage,
so I don't think it's so bad to avoid the problem and use UI_draw_roundbox_4fv for tooltips too.

It does mean we'd loose the outline and drop-shadow though (unless it's re-implemented).

@fclem, note: checking over the code it seems the use-case for optimized button drawing is quite different to tooltip backdrop where it's not really such an advantage, so I don't think it's so bad to avoid the problem and use `UI_draw_roundbox_4fv` for tooltips too. It does mean we'd loose the outline and drop-shadow though (unless it's re-implemented).

blender-admin commented

2018-09-11 22:11:05 +02:00

This issue was referenced by 8eedccb3f5

This issue was referenced by 8eedccb3f5d91bc60c4feb284cc2045badb45041

Clément Foucault commented

2018-09-11 22:11:24 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2018-09-11 22:11:24 +02:00

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Tooltip flicker alpha on redraw #56752