Commit: d6bc53b3be9adb40fd6c2347812156dcdc2592d1
Author: Jeroen Bakker
Date: Thu Sep 10 15:16:56 2020 +0200
Branches: uvimage-editor-drawing
https://developer.blender.org/rBd6bc53b3be9adb40fd6c2347812156dcdc2592d1
Reduce render artifacts introduced by snapping vertices to pixel coords
Use floor instead of round
===================================================================
M source/blender/draw/engines/overlay/shaders/edit_uv_edges_vert.glsl
===================================================================
diff --git
a/source/blender/draw/engines/overlay/shaders/edit_uv_edges_vert.glsl
b/source/blender/draw/engines/overlay/shaders/edit_uv_edges_vert.glsl
index 5e9d8054bc0..ec04ce36938 100644
--- a/source/blender/draw/engines/overlay/shaders/edit_uv_edges_vert.glsl
+++ b/source/blender/draw/engines/overlay/shaders/edit_uv_edges_vert.glsl
@@ -16,7 +16,7 @@ void main()
/* Snap vertices to the pixel grid to reduce artifacts. */
vec2 half_viewport_res = sizeViewport.xy * 0.5;
vec2 half_pixel_offset = sizeViewportInv * 0.5;
- gl_Position.xy = round(gl_Position.xy * half_viewport_res) /
half_viewport_res +
+ gl_Position.xy = floor(gl_Position.xy * half_viewport_res) /
half_viewport_res +
half_pixel_offset;
bool is_select = (flag & VERT_UV_SELECT) != 0;
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