#ifndef _RRVERTEXATTRIB_HPP
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#define _RRVERTEXATTRIB_HPP
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/*-------------------------------------------------------------------------
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* drawElements Quality Program Reference Renderer
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* -----------------------------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Vertex attribute fetch.
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*//*--------------------------------------------------------------------*/
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#include "rrDefs.hpp"
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#include "rrGenericVector.hpp"
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#include "tcuVector.hpp"
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namespace rr
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{
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enum VertexAttribType
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{
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// Can only be read as floats
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VERTEXATTRIBTYPE_FLOAT = 0,
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VERTEXATTRIBTYPE_HALF,
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VERTEXATTRIBTYPE_FIXED,
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VERTEXATTRIBTYPE_DOUBLE,
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// Can only be read as floats, will be normalized
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VERTEXATTRIBTYPE_NONPURE_UNORM8,
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VERTEXATTRIBTYPE_NONPURE_UNORM16,
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VERTEXATTRIBTYPE_NONPURE_UNORM32,
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VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
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// Clamped formats, GLES3-style conversion: max{c / (2^(b-1) - 1), -1 }
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VERTEXATTRIBTYPE_NONPURE_SNORM8_CLAMP,
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VERTEXATTRIBTYPE_NONPURE_SNORM16_CLAMP,
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VERTEXATTRIBTYPE_NONPURE_SNORM32_CLAMP,
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VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP, //!< Packed format, only size = 4 is allowed
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// Scaled formats, GLES2-style conversion: (2c + 1) / (2^b - 1)
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VERTEXATTRIBTYPE_NONPURE_SNORM8_SCALE,
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VERTEXATTRIBTYPE_NONPURE_SNORM16_SCALE,
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VERTEXATTRIBTYPE_NONPURE_SNORM32_SCALE,
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VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE, //!< Packed format, only size = 4 is allowed
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// can only be read as float, will not be normalized
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VERTEXATTRIBTYPE_NONPURE_UINT8,
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VERTEXATTRIBTYPE_NONPURE_UINT16,
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VERTEXATTRIBTYPE_NONPURE_UINT32,
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VERTEXATTRIBTYPE_NONPURE_INT8,
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VERTEXATTRIBTYPE_NONPURE_INT16,
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VERTEXATTRIBTYPE_NONPURE_INT32,
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VERTEXATTRIBTYPE_NONPURE_UINT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
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VERTEXATTRIBTYPE_NONPURE_INT_2_10_10_10_REV, //!< Packed format, only size = 4 is allowed
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// can only be read as integers
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VERTEXATTRIBTYPE_PURE_UINT8,
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VERTEXATTRIBTYPE_PURE_UINT16,
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VERTEXATTRIBTYPE_PURE_UINT32,
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VERTEXATTRIBTYPE_PURE_INT8,
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VERTEXATTRIBTYPE_PURE_INT16,
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VERTEXATTRIBTYPE_PURE_INT32,
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// reordered formats of GL_ARB_vertex_array_bgra
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VERTEXATTRIBTYPE_NONPURE_UNORM8_BGRA,
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VERTEXATTRIBTYPE_NONPURE_UNORM_2_10_10_10_REV_BGRA,
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VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_CLAMP_BGRA,
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VERTEXATTRIBTYPE_NONPURE_SNORM_2_10_10_10_REV_SCALE_BGRA,
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// can be read as anything
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VERTEXATTRIBTYPE_DONT_CARE, //!< Do not enforce type checking when reading GENERIC attribute. Used for current client side attributes.
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VERTEXATTRIBTYPE_LAST
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};
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/*--------------------------------------------------------------------*//*!
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* \brief Vertex attribute slot
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*
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* Vertex attribute type specifies component type for attribute and it
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* includes signed & normalized bits as well.
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*
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* Attribute size specifies how many components there are per vertex.
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* If size is 0, no components are fetched, ie. vertex attribute slot
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* is disabled.
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*
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* Divisor specifies the rate at which vertex attribute advances. If it is
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* zero, attribute is advanced per vertex. If divisor is non-zero, attribute
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* advances once per instanceDivisor instances.
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*
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* Pointer is used if not null, otherwise generic attribute is used instead
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* and in such case only DONT_CARE is valid attribute type.
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*//*--------------------------------------------------------------------*/
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struct VertexAttrib
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{
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VertexAttribType type; //!< Attribute component type.
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int size; //!< Number of components, valid range is [0,4].
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int stride; //!< Number of bytes two consecutive elements differ by. Zero works as in GL. Valid range is [0, inf).
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int instanceDivisor; //!< Vertex attribute divisor.
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const void* pointer; //!< Data pointer.
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GenericVec4 generic; //!< Generic attribute, used if pointer is null.
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VertexAttrib (void)
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: type (VERTEXATTRIBTYPE_FLOAT)
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, size (0)
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, stride (0)
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, instanceDivisor (0)
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, pointer (DE_NULL)
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{
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}
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VertexAttrib (VertexAttribType type_, int size_, int stride_, int instanceDivisor_, const void* pointer_)
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: type (type_)
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, size (size_)
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, stride (stride_)
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, instanceDivisor (instanceDivisor_)
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, pointer (pointer_)
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{
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}
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template<typename ScalarType>
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explicit VertexAttrib (const tcu::Vector<ScalarType, 4>& generic_)
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: type (VERTEXATTRIBTYPE_DONT_CARE)
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, size (0)
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, stride (0)
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, instanceDivisor (0)
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, pointer (DE_NULL)
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, generic (generic_)
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{
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}
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} DE_WARN_UNUSED_TYPE;
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bool isValidVertexAttrib (const VertexAttrib& vertexAttrib);
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// \todo [2013-04-01 pyry] Queries: isReadFloatValid(), isReadIntValid() ...
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void readVertexAttrib (tcu::Vec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
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void readVertexAttrib (tcu::IVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
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void readVertexAttrib (tcu::UVec4& dst, const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0);
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// Helpers that return by value (trivial for compiler to optimize).
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inline tcu::Vec4 readVertexAttribFloat (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
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{
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tcu::Vec4 v;
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readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
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return v;
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}
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inline tcu::IVec4 readVertexAttribInt (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
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{
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tcu::IVec4 v;
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readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
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return v;
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}
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inline tcu::UVec4 readVertexAttribUint (const VertexAttrib& vertexAttrib, const int instanceNdx, const int vertexNdx, const int baseInstanceNdx = 0)
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{
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tcu::UVec4 v;
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readVertexAttrib(v, vertexAttrib, instanceNdx, vertexNdx, baseInstanceNdx);
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return v;
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}
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} // rr
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#endif // _RRVERTEXATTRIB_HPP
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