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Fix #120789: Slowness when using image vectorscope opacity slider #120854

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Aras Pranckevicius merged 1 commits from aras_p/blender:scopes_opacity_update_cb into main 2024-04-20 17:09:06 +02:00
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Aras Pranckevicius commented 2024-04-20 16:36:45 +02:00
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Since image vectorscope RGB mode addition (567455124d), changing
the opacity was causing the scope to get recalculated from scratch,
because opacity value was put into vecscope_rgb data directly.

Instead of that, make vecscope_rgb data only contain RGB, and fill in
the GPU vertex buffer alpha values when creating the GPU batch.

Now tweaking the scope opacity slider feels at about the same
performance as in 4.0.

Since image vectorscope RGB mode addition (567455124d6161), changing the opacity was causing the scope to get recalculated from scratch, because opacity value was put into vecscope_rgb data directly. Instead of that, make vecscope_rgb data only contain RGB, and fill in the GPU vertex buffer alpha values when creating the GPU batch. Now tweaking the scope opacity slider feels at about the same performance as in 4.0.
Aras Pranckevicius added 1 commit 2024-04-20 16:36:57 +02:00
Fix #120789: Slowness when using image vectorscope opacity slider
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3028dd31d2 
Since image vectorscope RGB mode addition (567455124d), changing
the opacity was causing the scope to get recalculated from scratch,
because opacity value was put into vecscope_rgb data directly.

Instead of that, make vecscope_rgb data only contain RGB, and fill in
the GPU vertex buffer alpha values when creating the GPU batch.

Now tweaking the scope opacity slider feels at about the same
performance as in 4.0.
Aras Pranckevicius commented 2024-04-20 16:37:16 +02:00
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Aras Pranckevicius merged commit 689fce50bd into main 2024-04-20 17:09:06 +02:00
Aras Pranckevicius deleted branch scopes_opacity_update_cb 2024-04-20 17:09:08 +02:00
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Reference: blender/blender#120854
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