1 #ifndef _RRVERTEXATTRIB_HPP 2 #define _RRVERTEXATTRIB_HPP 3 /*------------------------------------------------------------------------- 4 * drawElements Quality Program Reference Renderer 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 Vertex attribute fetch. 24 *//*--------------------------------------------------------------------*/ 25 26 #include "rrDefs.hpp" 27 #include "rrGenericVector.hpp" 28 #include "tcuVector.hpp" 29 30 namespace rr 31 { 32 33 enum VertexAttribType 34 { 35 // Can only be read as floats 36 VERTEXATTRIBTYPE_FLOAT = 0, 37 VERTEXATTRIBTYPE_HALF, 38 VERTEXATTRIBTYPE_FIXED, 39 VERTEXATTRIBTYPE_DOUBLE, 40 41 // Can only be read as floats, will be normalized 42 VERTEXATTRIBTYPE_NONPURE_UNORM8, 43 VERTEXATTRIBTYPE_NONPURE_UNORM16, 44 VERTEXATTRIBTYPE_NONPURE_UNORM32, 45 VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed 46 47 // Clamped formats, GLES3-style conversion: max{c / (2^(b-1) - 1), -1 } 48 VERTEXATTRIBTYPE_NONPURE_SNORM8_CLAMP, 49 VERTEXATTRIBTYPE_NONPURE_SNORM16_CLAMP, 50 VERTEXATTRIBTYPE_NONPURE_SNORM32_CLAMP, 51 VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP, //!< Packed format, only size = 4 is allowed 52 53 // Scaled formats, GLES2-style conversion: (2c + 1) / (2^b - 1) 54 VERTEXATTRIBTYPE_NONPURE_SNORM8_SCALE, 55 VERTEXATTRIBTYPE_NONPURE_SNORM16_SCALE, 56 VERTEXATTRIBTYPE_NONPURE_SNORM32_SCALE, 57 VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE, //!< Packed format, only size = 4 is allowed 58 59 // can only be read as float, will not be normalized 60 VERTEXATTRIBTYPE_NONPURE_UINT8, 61 VERTEXATTRIBTYPE_NONPURE_UINT16, 62 VERTEXATTRIBTYPE_NONPURE_UINT32, 63 64 VERTEXATTRIBTYPE_NONPURE_INT8, 65 VERTEXATTRIBTYPE_NONPURE_INT16, 66 VERTEXATTRIBTYPE_NONPURE_INT32, 67 68 VERTEXATTRIBTYPE_NONPURE_UINT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed 69 VERTEXATTRIBTYPE_NONPURE_INT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed 70 71 // can only be read as integers 72 VERTEXATTRIBTYPE_PURE_UINT8, 73 VERTEXATTRIBTYPE_PURE_UINT16, 74 VERTEXATTRIBTYPE_PURE_UINT32, 75 76 VERTEXATTRIBTYPE_PURE_INT8, 77 VERTEXATTRIBTYPE_PURE_INT16, 78 VERTEXATTRIBTYPE_PURE_INT32, 79 80 // reordered formats of GL_ARB_vertex_array_bgra 81 VERTEXATTRIBTYPE_NONPURE_UNORM8_BGRA, 82 VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV_BGRA, 83 VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP_BGRA, 84 VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE_BGRA, 85 86 // can be read as anything 87 VERTEXATTRIBTYPE_DONT_CARE, //!< Do not enforce type checking when reading GENERIC attribute. Used for current client side attributes. 88 89 VERTEXATTRIBTYPE_LAST 90 }; 91 92 /*--------------------------------------------------------------------*//*! 93 * \brief Vertex attribute slot 94 * 95 * Vertex attribute type specifies component type for attribute and it 96 * includes signed & normalized bits as well. 97 * 98 * Attribute size specifies how many components there are per vertex. 99 * If size is 0, no components are fetched, ie. vertex attribute slot 100 * is disabled. 101 * 102 * Divisor specifies the rate at which vertex attribute advances. If it is 103 * zero, attribute is advanced per vertex. If divisor is non-zero, attribute 104 * advances once per instanceDivisor instances. 105 * 106 * Pointer is used if not null, otherwise generic attribute is used instead 107 * and in such case only DONT_CARE is valid attribute type. 108 *//*--------------------------------------------------------------------*/ 109 struct VertexAttrib 110 { 111 VertexAttribType type; //!< Attribute component type. 112 int size; //!< Number of components, valid range is [0,4]. 113 int stride; //!< Number of bytes two consecutive elements differ by. Zero works as in GL. Valid range is [0, inf). 114 int instanceDivisor; //!< Vertex attribute divisor. 115 const void* pointer; //!< Data pointer. 116 GenericVec4 generic; //!< Generic attribute, used if pointer is null. 117 118 VertexAttrib (void) 119 : type (VERTEXATTRIBTYPE_FLOAT) 120 , size (0) 121 , stride (0) 122 , instanceDivisor (0) 123 , pointer (DE_NULL) 124 { 125 } 126 127 VertexAttrib (VertexAttribType type_, int size_, int stride_, int instanceDivisor_, const void* pointer_) 128 : type (type_) 129 , size (size_) 130 , stride (stride_) 131 , instanceDivisor (instanceDivisor_) 132 , pointer (pointer_) 133 { 134 } 135 136 template<typename ScalarType> 137 explicit VertexAttrib (const tcu::Vector<ScalarType, 4>& generic_) 138 : type (VERTEXATTRIBTYPE_DONT_CARE) 139 , size (0) 140 , stride (0) 141 , instanceDivisor (0) 142 , pointer (DE_NULL) 143 , generic (generic_) 144 { 145 } 146 } DE_WARN_UNUSED_TYPE; 147 148 bool isValidVertexAttrib (const VertexAttrib& vertexAttrib); 149 // \todo [2013-04-01 pyry] Queries: isReadFloatValid(), isReadIntValid() ... 150 151 void readVertexAttrib (tcu::Vec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx); 152 void readVertexAttrib (tcu::IVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx); 153 void readVertexAttrib (tcu::UVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx); 154 155 // Helpers that return by value (trivial for compiler to optimize). 156 157 inline tcu::Vec4 readVertexAttribFloat (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx) 158 { 159 tcu::Vec4 v; 160 readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx); 161 return v; 162 } 163 164 inline tcu::IVec4 readVertexAttribInt (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx) 165 { 166 tcu::IVec4 v; 167 readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx); 168 return v; 169 } 170 171 inline tcu::UVec4 readVertexAttribUint (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx) 172 { 173 tcu::UVec4 v; 174 readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx); 175 return v; 176 } 177 178 } // rr 179 180 #endif // _RRVERTEXATTRIB_HPP 181
