[Bf-blender-cvs] [38399c0b10e] blender2.8: Object Mode: Outlines: Fix precision issue on intel GPU.

[Clément Foucault]

Commit: 38399c0b10e73cec5772a71809d4074332bb6231
Author: Clément Foucault
Date:   Tue Apr 17 22:09:56 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB38399c0b10e73cec5772a71809d4074332bb6231

Object Mode: Outlines: Fix precision issue on intel GPU.

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M	source/blender/draw/modes/shaders/object_outline_detect_frag.glsl

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diff --git a/source/blender/draw/modes/shaders/object_outline_detect_frag.glsl b/source/blender/draw/modes/shaders/object_outline_detect_frag.glsl
index a7e68485b86..dc457100d1c 100644
--- a/source/blender/draw/modes/shaders/object_outline_detect_frag.glsl
+++ b/source/blender/draw/modes/shaders/object_outline_detect_frag.glsl
@@ -40,8 +40,8 @@ void main()
 
 #ifdef GL_ARB_texture_gather
 	vec2 texel_size = 1.0 / vec2(textureSize(outlineId, 0).xy);
-	vec2 uv1 = gl_FragCoord.xy * texel_size - texel_size;
-	vec2 uv2 = gl_FragCoord.xy * texel_size;
+	vec2 uv1 = floor(gl_FragCoord.xy) * texel_size - texel_size;
+	vec2 uv2 = floor(gl_FragCoord.xy) * texel_size;
 
 	/* Samples order is CW starting from top left. */
 	uvec4 tmp1 = textureGather(outlineId, uv1);