#ifndef _RRVERTEXPACKET_HPP
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#define _RRVERTEXPACKET_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 packet and Vertex packet allocator
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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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#include <vector>
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namespace rr
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{
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class VertexPacketAllocator;
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/*--------------------------------------------------------------------*//*!
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* \brief Vertex packet
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*
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* Vertex packet contains inputs and outputs for vertex shading.
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*
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* Inputs consist of per-vertex vertex and instance indices. Attribute
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* list that can be accessed using those indices is provided as separate
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* pointer for VS.
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*
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* Outputs include position, optional point size, and list of generic
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* outputs that shader can write to. Number of VS outputs is specified
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* in ProgramInfo.
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*
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* VertexPacket instance must be created by VertexPacketAllocator as
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* outputs must be allocated memory after the instance.
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*//*--------------------------------------------------------------------*/
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struct VertexPacket
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{
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// Inputs.
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int instanceNdx; //!< Instance index.
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int vertexNdx; //!< Vertex index.
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// Outputs.
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tcu::Vec4 position; //!< Transformed position - must be written always.
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float pointSize; //!< Point size, required when rendering points.
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int primitiveID; //!< Geometry shader output
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GenericVec4 outputs[1]; //!< Generic vertex shader outputs - passed to subsequent shader stages. Array length is the number of outputs.
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// --- DO NOT ADD ANY MEMBER VARIABLES AFTER OUTPUTS, OUTPUTS IS VARIABLE-SIZED --- //
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private:
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// Allow creation and destruction only for Allocator
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VertexPacket (void);
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VertexPacket (const VertexPacket&); // disabled, non-copyable
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~VertexPacket (void);
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// Assignment cannot work without knowing the output array length => prevent assignment
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VertexPacket& operator= (const VertexPacket&); // disabled, non-copyable
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friend class VertexPacketAllocator;
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} DE_WARN_UNUSED_TYPE;
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/*--------------------------------------------------------------------*//*!
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* \brief Vertex packet allocator
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*
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* Allocates vertex packets.
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*
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* Vertex packet must have enough space allocated for its outputs.
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*
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* All memory allocated for vertex packets is released when VertexPacketAllocator
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* is destroyed. Allocated vertex packets should not be accessed after
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* allocator is destroyed.
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*
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* alloc and allocArray will throw bad_alloc if allocation fails.
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*//*--------------------------------------------------------------------*/
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class VertexPacketAllocator
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{
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public:
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VertexPacketAllocator (const size_t numberOfVertexOutputs);
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~VertexPacketAllocator (void);
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std::vector<VertexPacket*> allocArray (size_t count); // throws bad_alloc
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VertexPacket* alloc (void); // throws bad_alloc
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inline size_t getNumVertexOutputs (void) const { return m_numberOfVertexOutputs; }
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private:
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VertexPacketAllocator (const VertexPacketAllocator&); // disabled, non-copyable
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VertexPacketAllocator& operator= (const VertexPacketAllocator&); // disabled, non-copyable
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const size_t m_numberOfVertexOutputs;
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std::vector<deInt8*> m_allocations;
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std::vector<VertexPacket*> m_singleAllocPool;
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} DE_WARN_UNUSED_TYPE;
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} // rr
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#endif // _RRVERTEXPACKET_HPP
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