1 /*------------------------------------------------------------------------- 2 * drawElements Internal Test Module 3 * --------------------------------- 4 * 5 * Copyright 2015 The Android Open Source Project 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 * 19 *//*! 20 * \file 21 * \brief 8-bit sRGB conversion test. 22 *//*--------------------------------------------------------------------*/ 23 24 #include "ditSRGB8ConversionTest.hpp" 25 26 #include "tcuFloat.hpp" 27 #include "tcuTestLog.hpp" 28 #include "tcuTextureUtil.hpp" 29 #include "tcuVectorUtil.hpp" 30 31 namespace dit 32 { 33 namespace 34 { 35 36 deUint32 calculateDiscreteFloatDistance (float a, float b) 37 { 38 const deUint32 au = tcu::Float32(a).bits(); 39 const deUint32 bu = tcu::Float32(b).bits(); 40 41 const bool asign = (au & (0x1u << 31u)) != 0u; 42 const bool bsign = (bu & (0x1u << 31u)) != 0u; 43 44 const deUint32 avalue = (au & ((0x1u << 31u) - 1u)); 45 const deUint32 bvalue = (bu & ((0x1u << 31u) - 1u)); 46 47 if (asign != bsign) 48 return avalue + bvalue + 1u; 49 else if (avalue < bvalue) 50 return bvalue - avalue; 51 else 52 return avalue - bvalue; 53 } 54 55 const tcu::UVec4 calculateDiscreteFloatDistance (const tcu::Vec4& ref, const tcu::Vec4& res) 56 { 57 return tcu::UVec4(calculateDiscreteFloatDistance(ref[0], res[0]), calculateDiscreteFloatDistance(ref[1], res[1]), calculateDiscreteFloatDistance(ref[2], res[2]), calculateDiscreteFloatDistance(ref[3], res[3])); 58 } 59 60 class SRGB8ConversionTest : public tcu::TestCase 61 { 62 public: 63 SRGB8ConversionTest (tcu::TestContext& context) 64 : tcu::TestCase (context, "srgb8", "SRGB8 conversion test") 65 { 66 } 67 68 IterateResult iterate (void) 69 { 70 bool isOk = true; 71 tcu::TestLog& log = m_testCtx.getLog(); 72 73 for (int i = 0; i < 256; i++) 74 { 75 const tcu::UVec4 src (i); 76 const tcu::Vec4 res (tcu::sRGBA8ToLinear(src)); 77 const tcu::Vec4 ref (tcu::sRGBToLinear(src.cast<float>() / tcu::Vec4(255.0f))); 78 const tcu::Vec4 diff (res - ref); 79 const tcu::UVec4 discreteFloatDiff (calculateDiscreteFloatDistance(ref, res)); 80 81 if (tcu::anyNotEqual(res, ref)) 82 log << tcu::TestLog::Message << i << ", Res: " << res << ", Ref: " << ref << ", Diff: " << diff << ", Discrete float diff: " << discreteFloatDiff << tcu::TestLog::EndMessage; 83 84 if (tcu::boolAny(tcu::greaterThan(discreteFloatDiff, tcu::UVec4(1u)))) 85 isOk = false; 86 } 87 88 if (isOk) 89 m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass"); 90 else 91 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got ulp diffs greater than one."); 92 93 return STOP; 94 } 95 }; 96 97 } // anonymous 98 99 tcu::TestCase* createSRGB8ConversionTest (tcu::TestContext& context) 100 { 101 return new SRGB8ConversionTest(context); 102 } 103 104 } // dit 105
