From: Amber <amber@igalia.com>
Date: Tue, 3 Jan 2023 10:17:24 +0000 (+0100)
Subject: Use tolerance for comparison in linear interpolation tests.
X-Git-Tag: upstream/1.3.5~2^2~4^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e25deca42ca8827f3f86b926dac339836286dc1f;p=platform%2Fupstream%2FVK-GL-CTS.git

Use tolerance for comparison in linear interpolation tests.

Components: Vulkan
VK-GL-CTS issue: 4159

Affected tests:
dEQP-VK.draw.*.linear_interpolation.*

Change-Id: I026bb0128dc78ddab75cbfdcaabab00a8d05386a
---

diff --git a/external/vulkancts/modules/vulkan/draw/vktDrawMultisampleLinearInterpolationTests.cpp b/external/vulkancts/modules/vulkan/draw/vktDrawMultisampleLinearInterpolationTests.cpp
index 63d1b2f..f877676 100644
--- a/external/vulkancts/modules/vulkan/draw/vktDrawMultisampleLinearInterpolationTests.cpp
+++ b/external/vulkancts/modules/vulkan/draw/vktDrawMultisampleLinearInterpolationTests.cpp
@@ -539,7 +539,9 @@ void MultisampleLinearInterpolationTestCase::initPrograms (SourceCollections& pr
 			<< "    out_color /= " << m_interpolationRange << ";\n";
 
 		// Run additional sample comparison test. If it fails, we write 1.0 to blue color channel.
-		frg << "    if (out_color_sample != interpolateAtOffset(in_color, gl_SamplePosition - vec2(0.5)))\n"
+		frg << "    vec4 diff = out_color_sample - interpolateAtOffset(in_color, gl_SamplePosition - vec2(0.5));"
+			<< "    float min_precision = 0.000001;\n"
+			<< "    if (diff.x > min_precision && diff.y > min_precision && diff.z > min_precision && diff.w > min_precision)\n"
 			<< "    {\n"
 			<< "        out_color.z = 1.0;\n"
 			<< "    }\n";