[Bf-blender-cvs] [998b680e5bc] master: UI: Widget: Add conservative raster to avoid cut widget borders
Clément Foucault
noreply at git.blender.org
Tue Sep 1 16:08:52 CEST 2020
Commit: 998b680e5bc745721737f321fc1fad95875ca7bb
Author: Clément Foucault
Date: Tue Sep 1 15:44:53 2020 +0200
Branches: master
https://developer.blender.org/rB998b680e5bc745721737f321fc1fad95875ca7bb
UI: Widget: Add conservative raster to avoid cut widget borders
This avoids incorrect AA when the widget is not perfectly alligned with the
pixel grid.
===================================================================
M source/blender/gpu/shaders/gpu_shader_2D_widget_base_vert.glsl
===================================================================
diff --git a/source/blender/gpu/shaders/gpu_shader_2D_widget_base_vert.glsl b/source/blender/gpu/shaders/gpu_shader_2D_widget_base_vert.glsl
index d15f48c8f8a..fb512a1f00e 100644
--- a/source/blender/gpu/shaders/gpu_shader_2D_widget_base_vert.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_2D_widget_base_vert.glsl
@@ -57,9 +57,14 @@ in float dummy;
vec2 do_widget(void)
{
+ /* Offset to avoid loosing pixels (mimics conservative rasterization). */
+ const vec2 ofs = vec2(0.5, -0.5);
lineWidth = abs(rect.x - recti.x);
vec2 emboss_ofs = vec2(0.0, -lineWidth);
- vec2 v_pos[4] = vec2[4](rect.xz + emboss_ofs, rect.xw, rect.yz + emboss_ofs, rect.yw);
+ vec2 v_pos[4] = vec2[4](rect.xz + emboss_ofs + ofs.yy,
+ rect.xw + ofs.yx,
+ rect.yz + emboss_ofs + ofs.xy,
+ rect.yw + ofs.xx);
vec2 pos = v_pos[gl_VertexID];
uvInterp = pos - rect.xz;
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