blob: 5092e7365b1e191876f34d0cd893ec42b95328b3 [file] [log] [blame]
/*-------------------------------------------------------------------------
* drawElements Internal Test Module
* ---------------------------------
*
* Copyright 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*//*!
* \file
* \brief 8-bit sRGB conversion test.
*//*--------------------------------------------------------------------*/
#include "ditSRGB8ConversionTest.hpp"
#include "tcuFloat.hpp"
#include "tcuTestLog.hpp"
#include "tcuTextureUtil.hpp"
#include "tcuVectorUtil.hpp"
namespace dit
{
namespace
{
deUint32 calculateDiscreteFloatDistance (float a, float b)
{
const deUint32 au = tcu::Float32(a).bits();
const deUint32 bu = tcu::Float32(b).bits();
const bool asign = (au & (0x1u << 31u)) != 0u;
const bool bsign = (bu & (0x1u << 31u)) != 0u;
const deUint32 avalue = (au & ((0x1u << 31u) - 1u));
const deUint32 bvalue = (bu & ((0x1u << 31u) - 1u));
if (asign != bsign)
return avalue + bvalue + 1u;
else if (avalue < bvalue)
return bvalue - avalue;
else
return avalue - bvalue;
}
const tcu::UVec4 calculateDiscreteFloatDistance (const tcu::Vec4& ref, const tcu::Vec4& res)
{
return tcu::UVec4(calculateDiscreteFloatDistance(ref[0], res[0]), calculateDiscreteFloatDistance(ref[1], res[1]), calculateDiscreteFloatDistance(ref[2], res[2]), calculateDiscreteFloatDistance(ref[3], res[3]));
}
class SRGB8ConversionTest : public tcu::TestCase
{
public:
SRGB8ConversionTest (tcu::TestContext& context)
: tcu::TestCase (context, "srgb8", "SRGB8 conversion test")
{
}
IterateResult iterate (void)
{
bool isOk = true;
tcu::TestLog& log = m_testCtx.getLog();
for (int i = 0; i < 256; i++)
{
const tcu::UVec4 src (i);
const tcu::Vec4 res (tcu::sRGBA8ToLinear(src));
const tcu::Vec4 ref (tcu::sRGBToLinear(src.cast<float>() / tcu::Vec4(255.0f)));
const tcu::Vec4 diff (res - ref);
const tcu::UVec4 discreteFloatDiff (calculateDiscreteFloatDistance(ref, res));
if (tcu::anyNotEqual(res, ref))
log << tcu::TestLog::Message << i << ", Res: " << res << ", Ref: " << ref << ", Diff: " << diff << ", Discrete float diff: " << discreteFloatDiff << tcu::TestLog::EndMessage;
if (tcu::boolAny(tcu::greaterThan(discreteFloatDiff, tcu::UVec4(1u))))
isOk = false;
}
if (isOk)
m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
else
m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got ulp diffs greater than one.");
return STOP;
}
};
} // anonymous
tcu::TestCase* createSRGB8ConversionTest (tcu::TestContext& context)
{
return new SRGB8ConversionTest(context);
}
} // dit