Increase threshold in layout_binding tests.

Bug: 19990291
Change-Id: I3292bdd7077546adbdd88240362166d53905f804

diff --git a/modules/gles31/functional/es31fLayoutBindingTests.cpp b/modules/gles31/functional/es31fLayoutBindingTests.cpp
index 70672ca..9c6b557 100644 (file)
--- a/modules/gles31/functional/es31fLayoutBindingTests.cpp
+++ b/modules/gles31/functional/es31fLayoutBindingTests.cpp
@@ -526,9 +526,16 @@ void LayoutBindingRenderCase::initRenderState (void)
 
 bool LayoutBindingRenderCase::drawAndVerifyResult (const Vec4& expectedColor)
 {
-       const glw::Functions&   gl                      = m_context.getRenderContext().getFunctions();
-       const tcu::RGBA                 threshold       = m_context.getRenderContext().getRenderTarget().getPixelFormat().getColorThreshold();
-       tcu::Surface                    reference       (TEST_RENDER_WIDTH, TEST_RENDER_HEIGHT);
+       const glw::Functions&   gl                                      = m_context.getRenderContext().getFunctions();
+       tcu::Surface                    reference                       (TEST_RENDER_WIDTH, TEST_RENDER_HEIGHT);
+
+       // the point of these test is to check layout_binding. For this purpose, we can use quite
+       // large thresholds.
+       const tcu::RGBA                 surfaceThreshold        = m_context.getRenderContext().getRenderTarget().getPixelFormat().getColorThreshold();
+       const tcu::RGBA                 compareThreshold        = tcu::RGBA(de::clamp(2 * surfaceThreshold.getRed(),   0, 255),
+                                                                                                                       de::clamp(2 * surfaceThreshold.getGreen(), 0, 255),
+                                                                                                                       de::clamp(2 * surfaceThreshold.getBlue(),  0, 255),
+                                                                                                                       de::clamp(2 * surfaceThreshold.getAlpha(), 0, 255));
 
        gl.clear(GL_COLOR_BUFFER_BIT);
 
@@ -543,9 +550,9 @@ bool LayoutBindingRenderCase::drawAndVerifyResult (const Vec4& expectedColor)
        GLU_EXPECT_NO_ERROR(gl.getError(), "Read pixels failed");
 
        tcu::clear(reference.getAccess(), expectedColor);
-       m_testCtx.getLog() << tcu::TestLog::Message << "Verifying output image" << tcu::TestLog::EndMessage;
+       m_testCtx.getLog() << tcu::TestLog::Message << "Verifying output image, fragment output color is " << expectedColor << tcu::TestLog::EndMessage;
 
-       return tcu::pixelThresholdCompare(m_testCtx.getLog(), "Render result", "Result verification", reference, result, threshold, tcu::COMPARE_LOG_RESULT);
+       return tcu::pixelThresholdCompare(m_testCtx.getLog(), "Render result", "Result verification", reference, result, compareThreshold, tcu::COMPARE_LOG_RESULT);
 }
 
 void LayoutBindingRenderCase::setTestResult (bool queryTestPassed, bool imageTestPassed)