1 #ifndef _TCUPIXELFORMAT_HPP 2 #define _TCUPIXELFORMAT_HPP 3 /*------------------------------------------------------------------------- 4 * drawElements Quality Program Tester Core 5 * ---------------------------------------- 6 * 7 * Copyright 2014 The Android Open Source Project 8 * 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 * 21 *//*! 22 * \file 23 * \brief Pixel format descriptor. 24 *//*--------------------------------------------------------------------*/ 25 26 #include "tcuDefs.hpp" 27 #include "tcuRGBA.hpp" 28 29 namespace tcu 30 { 31 32 /*--------------------------------------------------------------------*//*! 33 * \brief Fixed-point render target pixel format 34 *//*--------------------------------------------------------------------*/ 35 struct PixelFormat 36 { 37 int redBits; 38 int greenBits; 39 int blueBits; 40 int alphaBits; 41 42 PixelFormat (int red, int green, int blue, int alpha) 43 : redBits(red) 44 , greenBits(green) 45 , blueBits(blue) 46 , alphaBits(alpha) 47 { 48 } 49 50 PixelFormat (void) 51 : redBits(0) 52 , greenBits(0) 53 , blueBits(0) 54 , alphaBits(0) 55 { 56 } 57 58 /*--------------------------------------------------------------------*//*! 59 * \brief Get default threshold for per-pixel comparison for this format 60 * 61 * Per-channel threshold is 2^(8-bits). If alpha channel bits are zero, 62 * threshold for that channel is 0. 63 *//*--------------------------------------------------------------------*/ 64 inline RGBA getColorThreshold (void) const 65 { 66 return RGBA( 67 1 << (8 - redBits), 68 1 << (8 - greenBits), 69 1 << (8 - blueBits), 70 (alphaBits > 0) ? (1 << (8 - alphaBits)) : 0); 71 } 72 73 static inline int convertChannel (int val, int bits) 74 { 75 if (bits == 1) 76 return (val & 0x80) ? 0xff : 0; 77 else 78 { 79 DE_ASSERT(deInRange32(bits, 4, 8)); 80 int c = val >> (8-bits); 81 return (c << (8-bits)) | (c >> (2*bits-8)); 82 } 83 } 84 85 /*--------------------------------------------------------------------*//*! 86 * \brief Emulate reduced bit depth 87 * 88 * The color value bit depth is reduced and converted back. The lowest 89 * bits are filled by replicating the upper bits. 90 *//*--------------------------------------------------------------------*/ 91 inline RGBA convertColor (const RGBA& col) const 92 { 93 return RGBA(convertChannel(col.getRed(), redBits), 94 convertChannel(col.getGreen(), greenBits), 95 convertChannel(col.getBlue(), blueBits), 96 alphaBits ? convertChannel(col.getAlpha(), alphaBits) : 0xff); 97 } 98 99 inline bool operator== (const PixelFormat& other) const 100 { 101 return redBits == other.redBits && 102 greenBits == other.greenBits && 103 blueBits == other.blueBits && 104 alphaBits == other.alphaBits; 105 } 106 107 inline bool operator!= (const PixelFormat& other) const 108 { 109 return !(*this == other); 110 } 111 }; 112 113 } // namespace tcu 114 115 #endif // _TCUPIXELFORMAT_HPP 116
