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physx/samples/sampleframework/renderer/include/RendererInstanceBuffer.h

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+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2008-2021 NVIDIA Corporation. All rights reserved.
+
+#ifndef RENDERER_INSTANCEBUFFER_H
+#define RENDERER_INSTANCEBUFFER_H
+
+#include <RendererConfig.h>
+#include "RendererInteropableBuffer.h"
+
+namespace SampleRenderer
+{
+
+	class RendererInstanceBufferDesc;
+
+	class RendererInstanceBuffer: public RendererInteropableBuffer
+	{
+		friend class RendererMesh;
+	public:
+		enum Semantic
+		{
+			SEMANTIC_POSITION = 0,
+			SEMANTIC_NORMALX,
+			SEMANTIC_NORMALY,
+			SEMANTIC_NORMALZ,
+			SEMANTIC_VELOCITY_LIFE,// life remain (0-1] is packed into w
+			SEMANTIC_DENSITY,
+			SEMANTIC_UV_OFFSET,
+			SEMANTIC_LOCAL_OFFSET,
+
+			NUM_SEMANTICS
+		}_Semantic;
+
+		enum Format
+		{
+			FORMAT_FLOAT1 = 0,
+			FORMAT_FLOAT2,
+			FORMAT_FLOAT3,
+			FORMAT_FLOAT4,
+
+			NUM_FORMATS,
+		}_Format;
+
+		enum Hint
+		{
+			HINT_STATIC = 0,
+			HINT_DYNAMIC,
+		}_Hint;
+
+	public:
+		static PxU32 getFormatByteSize(Format format);
+
+	protected:
+		RendererInstanceBuffer(const RendererInstanceBufferDesc &desc);
+		virtual ~RendererInstanceBuffer(void);
+
+	public:
+		void release(void) { delete this; }
+
+		Hint   getHint(void) const;
+		Format getFormatForSemantic(Semantic semantic) const;
+		PxU32  getMaxInstances(void) const;
+		PxU32  getOffsetForSemantic(Semantic semantic) const;
+
+		void *lockSemantic(Semantic semantic, PxU32 &stride);
+		void  unlockSemantic(Semantic semantic);
+
+		virtual void *lock(void) = 0;
+		virtual void  unlock(void) = 0;
+		virtual PxU32 getStride(void) const { return m_stride; }
+	private:
+
+		virtual void  bind(PxU32 streamID, PxU32 firstInstance) const = 0;
+		virtual void  unbind(PxU32 streamID) const = 0;
+
+		RendererInstanceBuffer &operator=(const RendererInstanceBuffer &) { return *this; }
+
+	protected:
+		class SemanticDesc
+		{
+		public:
+			Format format;
+			PxU32  offset;
+			bool   locked;
+		public:
+			SemanticDesc(void)
+			{
+				format = NUM_FORMATS;
+				offset = 0;
+				locked = false;
+			}
+		};
+
+	protected:
+		const Hint   m_hint;
+		PxU32        m_maxInstances;
+		PxU32        m_stride;
+		SemanticDesc m_semanticDescs[NUM_SEMANTICS];
+
+	private:
+		void        *m_lockedBuffer;
+		PxU32        m_numSemanticLocks;
+	};
+
+} // namespace SampleRenderer
+
+#endif