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Add a debanding property to Viewport

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It can be enabled in the Project Settings
(`rendering/quality/screen_filters/use_debanding`). It's disabled
by default as it has a small performance impact and can make
PNG screenshots much larger (due to how dithering works).
It will also slightly brighten the scene's dark areas.

As a result, it should be enabled only when banding is noticeable enough.

This closes #17006.
This commit is contained in:
Hugo Locurcio
2020-04-20 23:34:47 +02:00
parent aded76cb84
commit 8891579068
16 changed files with 82 additions and 14 deletions
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servers/rendering/rasterizer_rd/rasterizer_effects_rd.cpp
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@@ -708,6 +708,7 @@ void RasterizerEffectsRD::tonemapper(RID p_source_color, RID p_dst_framebuffer,
tonemap.push_constant.use_color_correction = p_settings.use_color_correction;
tonemap.push_constant.use_fxaa = p_settings.use_fxaa;
tonemap.push_constant.use_debanding = p_settings.use_debanding;
tonemap.push_constant.pixel_size[0] = 1.0 / p_settings.texture_size.x;
tonemap.push_constant.pixel_size[1] = 1.0 / p_settings.texture_size.y;