framework/referencerenderer/rrPrimitivePacket.hpp

#ifndef _RRPRIMITIVEPACKET_HPP
#define _RRPRIMITIVEPACKET_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Reference Renderer
 * -----------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Primitive packet
 *//*--------------------------------------------------------------------*/

#include "rrDefs.hpp"
#include "rrGenericVector.hpp"

#include <vector>

namespace rr
{

struct VertexPacket;
class VertexPacketAllocator;

/*--------------------------------------------------------------------*//*!
 * \brief Geometry packet
 *
 * Geometry packet contains inputs for geometry shading.
 *//*--------------------------------------------------------------------*/
struct PrimitivePacket
{
	int						primitiveIDIn;
	const VertexPacket*		vertices[6];
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief Geometry emitter
 *
 * Geometry emitter handles outputting of new vertices from geometry shader
 *//*--------------------------------------------------------------------*/
class GeometryEmitter
{
public:
								GeometryEmitter	(VertexPacketAllocator& vpalloc, size_t numVertices);

	void						EmitVertex		(const tcu::Vec4& position, float pointSize, const GenericVec4* varyings, int primitiveID);
	void						EndPrimitive	(void);

	void						moveEmittedTo	(std::vector<VertexPacket*>&);

private:
								GeometryEmitter	(const GeometryEmitter&);
	GeometryEmitter&			operator=		(const GeometryEmitter&);

	std::vector<VertexPacket*>	m_emitted;	//!< NULL elements mean primitive end
	VertexPacketAllocator&		m_vpalloc;
	size_t						m_numEmitted;
	size_t						m_maxVertices;

} DE_WARN_UNUSED_TYPE;

} // rr

#endif // _RRPRIMITIVEPACKET_HPP