rsMesh.cpp - platform/frameworks/rs - Gitiles

 /*
  * Copyright (C) 2009 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.
  */

 #ifndef ANDROID_RS_BUILD_FOR_HOST
 #include "rsContext.h"

 #include <GLES/gl.h>
 #include <GLES2/gl2.h>
 #include <GLES/glext.h>
 #else
 #include "rsContextHostStub.h"

 #include <OpenGL/gl.h>
 #include <OpenGl/glext.h>
 #endif


 using namespace android;
 using namespace android::renderscript;

 Mesh::Mesh(Context *rsc) : ObjectBase(rsc)
 {
     mAllocFile = __FILE__;
     mAllocLine = __LINE__;
     mPrimitives = NULL;
     mPrimitivesCount = 0;
     mVertexBuffers = NULL;
     mVertexBufferCount = 0;
 }

 Mesh::~Mesh()
 {
     if(mVertexBuffers) {
         delete[] mVertexBuffers;
     }

     if(mPrimitives) {
         for(uint32_t i = 0; i < mPrimitivesCount; i ++) {
             delete mPrimitives[i];
         }
         delete[] mPrimitives;
     }
 }

 void Mesh::render(Context *rsc) const
 {
     for(uint32_t ct = 0; ct < mPrimitivesCount; ct ++) {
         renderPrimitive(rsc, ct);
     }
 }

 void Mesh::renderPrimitive(Context *rsc, uint32_t primIndex) const {
     if (primIndex >= mPrimitivesCount) {
         LOGE("Invalid primitive index");
         return;
     }

     Primitive_t *prim = mPrimitives[primIndex];

     if (prim->mIndexBuffer.get()) {
         renderPrimitiveRange(rsc, primIndex, 0, prim->mIndexBuffer->getType()->getDimX());
         return;
     }

     renderPrimitiveRange(rsc, primIndex, 0, mVertexBuffers[0]->getType()->getDimX());
 }

 void Mesh::renderPrimitiveRange(Context *rsc, uint32_t primIndex, uint32_t start, uint32_t len) const
 {
     if (len < 1 || primIndex >= mPrimitivesCount) {
         return;
     }

     rsc->checkError("Mesh::renderPrimitiveRange 1");
     VertexArray va;
     for (uint32_t ct=0; ct < mVertexBufferCount; ct++) {
         mVertexBuffers[ct]->uploadCheck(rsc);
         if (mVertexBuffers[ct]->getIsBufferObject()) {
             va.setActiveBuffer(mVertexBuffers[ct]->getBufferObjectID());
         } else {
             va.setActiveBuffer(mVertexBuffers[ct]->getPtr());
         }
         mVertexBuffers[ct]->getType()->enableGLVertexBuffer(&va);
     }
     va.setupGL2(rsc, &rsc->mStateVertexArray, &rsc->mShaderCache);

     rsc->checkError("Mesh::renderPrimitiveRange 2");
     Primitive_t *prim = mPrimitives[primIndex];
     if (prim->mIndexBuffer.get()) {
         prim->mIndexBuffer->uploadCheck(rsc);
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, prim->mIndexBuffer->getBufferObjectID());
         glDrawElements(prim->mGLPrimitive, len, GL_UNSIGNED_SHORT, (uint16_t *)(start * 2));
     } else {
         glDrawArrays(prim->mGLPrimitive, start, len);
     }

     rsc->checkError("Mesh::renderPrimitiveRange");
 }


 void Mesh::uploadAll(Context *rsc)
 {
     for (uint32_t ct = 0; ct < mVertexBufferCount; ct ++) {
         if (mVertexBuffers[ct].get()) {
             mVertexBuffers[ct]->deferedUploadToBufferObject(rsc);
         }
     }

     for (uint32_t ct = 0; ct < mPrimitivesCount; ct ++) {
         if (mPrimitives[ct]->mIndexBuffer.get()) {
             mPrimitives[ct]->mIndexBuffer->deferedUploadToBufferObject(rsc);
         }
     }
 }

 void Mesh::updateGLPrimitives()
 {
     for(uint32_t i = 0; i < mPrimitivesCount; i ++) {
         switch(mPrimitives[i]->mPrimitive) {
             case RS_PRIMITIVE_POINT:          mPrimitives[i]->mGLPrimitive = GL_POINTS; break;
             case RS_PRIMITIVE_LINE:           mPrimitives[i]->mGLPrimitive = GL_LINES; break;
             case RS_PRIMITIVE_LINE_STRIP:     mPrimitives[i]->mGLPrimitive = GL_LINE_STRIP; break;
             case RS_PRIMITIVE_TRIANGLE:       mPrimitives[i]->mGLPrimitive = GL_TRIANGLES; break;
             case RS_PRIMITIVE_TRIANGLE_STRIP: mPrimitives[i]->mGLPrimitive = GL_TRIANGLE_STRIP; break;
             case RS_PRIMITIVE_TRIANGLE_FAN:   mPrimitives[i]->mGLPrimitive = GL_TRIANGLE_FAN; break;
         }
     }
 }

 void Mesh::serialize(OStream *stream) const
 {
     // Need to identify ourselves
     stream->addU32((uint32_t)getClassId());

     String8 name(getName());
     stream->addString(&name);

     // Store number of vertex streams
     stream->addU32(mVertexBufferCount);
     for(uint32_t vCount = 0; vCount < mVertexBufferCount; vCount ++) {
         mVertexBuffers[vCount]->serialize(stream);
     }

     stream->addU32(mPrimitivesCount);
     // Store the primitives
     for (uint32_t pCount = 0; pCount < mPrimitivesCount; pCount ++) {
         Primitive_t * prim = mPrimitives[pCount];

         stream->addU8((uint8_t)prim->mPrimitive);

         if(prim->mIndexBuffer.get()) {
             stream->addU32(1);
             prim->mIndexBuffer->serialize(stream);
         }
         else {
             stream->addU32(0);
         }
     }
 }

 Mesh *Mesh::createFromStream(Context *rsc, IStream *stream)
 {
     // First make sure we are reading the correct object
     RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
     if(classID != RS_A3D_CLASS_ID_MESH) {
         LOGE("mesh loading skipped due to invalid class id");
         return NULL;
     }

     Mesh * mesh = new Mesh(rsc);

     String8 name;
     stream->loadString(&name);
     mesh->setName(name.string(), name.size());

     mesh->mVertexBufferCount = stream->loadU32();
     if(mesh->mVertexBufferCount) {
         mesh->mVertexBuffers = new ObjectBaseRef<Allocation>[mesh->mVertexBufferCount];

         for(uint32_t vCount = 0; vCount < mesh->mVertexBufferCount; vCount ++) {
             Allocation *vertexAlloc = Allocation::createFromStream(rsc, stream);
             mesh->mVertexBuffers[vCount].set(vertexAlloc);
         }
     }

     mesh->mPrimitivesCount = stream->loadU32();
     if(mesh->mPrimitivesCount) {
         mesh->mPrimitives = new Primitive_t *[mesh->mPrimitivesCount];

         // load all primitives
         for (uint32_t pCount = 0; pCount < mesh->mPrimitivesCount; pCount ++) {
             Primitive_t * prim = new Primitive_t;
             mesh->mPrimitives[pCount] = prim;

             prim->mPrimitive = (RsPrimitive)stream->loadU8();

             // Check to see if the index buffer was stored
             uint32_t isIndexPresent = stream->loadU32();
             if(isIndexPresent) {
                 Allocation *indexAlloc = Allocation::createFromStream(rsc, stream);
                 prim->mIndexBuffer.set(indexAlloc);
             }
         }
     }

     mesh->updateGLPrimitives();
     mesh->uploadAll(rsc);

     return mesh;
 }

 void Mesh::computeBBox() {
     float *posPtr = NULL;
     uint32_t vectorSize = 0;
     uint32_t stride = 0;
     uint32_t numVerts = 0;
     // First we need to find the position ptr and stride
     for (uint32_t ct=0; ct < mVertexBufferCount; ct++) {
         const Type *bufferType = mVertexBuffers[ct]->getType();
         const Element *bufferElem = bufferType->getElement();

         for (uint32_t ct=0; ct < bufferElem->getFieldCount(); ct++) {
             if(strcmp(bufferElem->getFieldName(ct), "position") == 0) {
                 vectorSize = bufferElem->getField(ct)->getComponent().getVectorSize();
                 stride = bufferElem->getSizeBytes() / sizeof(float);
                 uint32_t offset = bufferElem->getFieldOffsetBytes(ct);
                 posPtr = (float*)((uint8_t*)mVertexBuffers[ct]->getPtr() + offset);
                 numVerts = bufferType->getDimX();
                 break;
             }
         }
         if(posPtr) {
             break;
         }
     }

     mBBoxMin[0] = mBBoxMin[1] = mBBoxMin[2] = 1e6;
     mBBoxMax[0] = mBBoxMax[1] = mBBoxMax[2] = -1e6;
     if(!posPtr) {
         LOGE("Unable to compute bounding box");
         mBBoxMin[0] = mBBoxMin[1] = mBBoxMin[2] = 0.0f;
         mBBoxMax[0] = mBBoxMax[1] = mBBoxMax[2] = 0.0f;
         return;
     }

     for(uint32_t i = 0; i < numVerts; i ++) {
         for(uint32_t v = 0; v < vectorSize; v ++) {
             mBBoxMin[v] = rsMin(mBBoxMin[v], posPtr[v]);
             mBBoxMax[v] = rsMax(mBBoxMax[v], posPtr[v]);
         }
         posPtr += stride;
     }
 }


 MeshContext::MeshContext()
 {
 }

 MeshContext::~MeshContext()
 {
 }

 namespace android {
 namespace renderscript {

 RsMesh rsi_MeshCreate(Context *rsc, uint32_t vtxCount, uint32_t idxCount)
 {
     Mesh *sm = new Mesh(rsc);
     sm->incUserRef();

     sm->mPrimitivesCount = idxCount;
     sm->mPrimitives = new Mesh::Primitive_t *[sm->mPrimitivesCount];
     for(uint32_t ct = 0; ct < idxCount; ct ++) {
         sm->mPrimitives[ct] = new Mesh::Primitive_t;
     }

     sm->mVertexBufferCount = vtxCount;
     sm->mVertexBuffers = new ObjectBaseRef<Allocation>[vtxCount];

     return sm;
 }

 void rsi_MeshBindVertex(Context *rsc, RsMesh mv, RsAllocation va, uint32_t slot)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     rsAssert(slot < sm->mVertexBufferCount);

     sm->mVertexBuffers[slot].set((Allocation *)va);
 }

 void rsi_MeshBindIndex(Context *rsc, RsMesh mv, RsAllocation va, uint32_t primType, uint32_t slot)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     rsAssert(slot < sm->mPrimitivesCount);

     sm->mPrimitives[slot]->mIndexBuffer.set((Allocation *)va);
     sm->mPrimitives[slot]->mPrimitive = (RsPrimitive)primType;
     sm->updateGLPrimitives();
 }

 void rsi_MeshGetVertexBufferCount(Context *rsc, RsMesh mv, int32_t *numVtx)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     *numVtx = sm->mVertexBufferCount;
 }

 void rsi_MeshGetIndexCount(Context *rsc, RsMesh mv, int32_t *numIdx)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     *numIdx = sm->mPrimitivesCount;
 }

 void rsi_MeshGetVertices(Context *rsc, RsMesh mv, RsAllocation *vtxData, uint32_t vtxDataCount)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     rsAssert(vtxDataCount == sm->mVertexBufferCount);

     for(uint32_t ct = 0; ct < vtxDataCount; ct ++) {
         vtxData[ct] = sm->mVertexBuffers[ct].get();
         sm->mVertexBuffers[ct]->incUserRef();
     }
 }

 void rsi_MeshGetIndices(Context *rsc, RsMesh mv, RsAllocation *va, uint32_t *primType, uint32_t idxDataCount)
 {
     Mesh *sm = static_cast<Mesh *>(mv);
     rsAssert(idxDataCount == sm->mPrimitivesCount);

     for(uint32_t ct = 0; ct < idxDataCount; ct ++) {
         va[ct] = sm->mPrimitives[ct]->mIndexBuffer.get();
         primType[ct] = sm->mPrimitives[ct]->mPrimitive;
         if(sm->mPrimitives[ct]->mIndexBuffer.get()) {
             sm->mPrimitives[ct]->mIndexBuffer->incUserRef();
         }
     }

 }


 }}
	/*
	* Copyright (C) 2009 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.
	*/

	#ifndef ANDROID_RS_BUILD_FOR_HOST
	#include "rsContext.h"

	#include <GLES/gl.h>
	#include <GLES2/gl2.h>
	#include <GLES/glext.h>
	#else
	#include "rsContextHostStub.h"

	#include <OpenGL/gl.h>
	#include <OpenGl/glext.h>
	#endif


	using namespace android;
	using namespace android::renderscript;

	Mesh::Mesh(Context *rsc) : ObjectBase(rsc)
	{
	mAllocFile = __FILE__;
	mAllocLine = __LINE__;
	mPrimitives = NULL;
	mPrimitivesCount = 0;
	mVertexBuffers = NULL;
	mVertexBufferCount = 0;
	}

	Mesh::~Mesh()
	{
	if(mVertexBuffers) {
	delete[] mVertexBuffers;
	}

	if(mPrimitives) {
	for(uint32_t i = 0; i < mPrimitivesCount; i ++) {
	delete mPrimitives[i];
	}
	delete[] mPrimitives;
	}
	}

	void Mesh::render(Context *rsc) const
	{
	for(uint32_t ct = 0; ct < mPrimitivesCount; ct ++) {
	renderPrimitive(rsc, ct);
	}
	}

	void Mesh::renderPrimitive(Context *rsc, uint32_t primIndex) const {
	if (primIndex >= mPrimitivesCount) {
	LOGE("Invalid primitive index");
	return;
	}

	Primitive_t *prim = mPrimitives[primIndex];

	if (prim->mIndexBuffer.get()) {
	renderPrimitiveRange(rsc, primIndex, 0, prim->mIndexBuffer->getType()->getDimX());
	return;
	}

	renderPrimitiveRange(rsc, primIndex, 0, mVertexBuffers[0]->getType()->getDimX());
	}

	void Mesh::renderPrimitiveRange(Context *rsc, uint32_t primIndex, uint32_t start, uint32_t len) const
	{
	if (len < 1 \|\| primIndex >= mPrimitivesCount) {
	return;
	}

	rsc->checkError("Mesh::renderPrimitiveRange 1");
	VertexArray va;
	for (uint32_t ct=0; ct < mVertexBufferCount; ct++) {
	mVertexBuffers[ct]->uploadCheck(rsc);
	if (mVertexBuffers[ct]->getIsBufferObject()) {
	va.setActiveBuffer(mVertexBuffers[ct]->getBufferObjectID());
	} else {
	va.setActiveBuffer(mVertexBuffers[ct]->getPtr());
	}
	mVertexBuffers[ct]->getType()->enableGLVertexBuffer(&va);
	}
	va.setupGL2(rsc, &rsc->mStateVertexArray, &rsc->mShaderCache);

	rsc->checkError("Mesh::renderPrimitiveRange 2");
	Primitive_t *prim = mPrimitives[primIndex];
	if (prim->mIndexBuffer.get()) {
	prim->mIndexBuffer->uploadCheck(rsc);
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, prim->mIndexBuffer->getBufferObjectID());
	glDrawElements(prim->mGLPrimitive, len, GL_UNSIGNED_SHORT, (uint16_t )(start 2));
	} else {
	glDrawArrays(prim->mGLPrimitive, start, len);
	}

	rsc->checkError("Mesh::renderPrimitiveRange");
	}


	void Mesh::uploadAll(Context *rsc)
	{
	for (uint32_t ct = 0; ct < mVertexBufferCount; ct ++) {
	if (mVertexBuffers[ct].get()) {
	mVertexBuffers[ct]->deferedUploadToBufferObject(rsc);
	}
	}

	for (uint32_t ct = 0; ct < mPrimitivesCount; ct ++) {
	if (mPrimitives[ct]->mIndexBuffer.get()) {
	mPrimitives[ct]->mIndexBuffer->deferedUploadToBufferObject(rsc);
	}
	}
	}

	void Mesh::updateGLPrimitives()
	{
	for(uint32_t i = 0; i < mPrimitivesCount; i ++) {
	switch(mPrimitives[i]->mPrimitive) {
	case RS_PRIMITIVE_POINT: mPrimitives[i]->mGLPrimitive = GL_POINTS; break;
	case RS_PRIMITIVE_LINE: mPrimitives[i]->mGLPrimitive = GL_LINES; break;
	case RS_PRIMITIVE_LINE_STRIP: mPrimitives[i]->mGLPrimitive = GL_LINE_STRIP; break;
	case RS_PRIMITIVE_TRIANGLE: mPrimitives[i]->mGLPrimitive = GL_TRIANGLES; break;
	case RS_PRIMITIVE_TRIANGLE_STRIP: mPrimitives[i]->mGLPrimitive = GL_TRIANGLE_STRIP; break;
	case RS_PRIMITIVE_TRIANGLE_FAN: mPrimitives[i]->mGLPrimitive = GL_TRIANGLE_FAN; break;
	}
	}
	}

	void Mesh::serialize(OStream *stream) const
	{
	// Need to identify ourselves
	stream->addU32((uint32_t)getClassId());

	String8 name(getName());
	stream->addString(&name);

	// Store number of vertex streams
	stream->addU32(mVertexBufferCount);
	for(uint32_t vCount = 0; vCount < mVertexBufferCount; vCount ++) {
	mVertexBuffers[vCount]->serialize(stream);
	}

	stream->addU32(mPrimitivesCount);
	// Store the primitives
	for (uint32_t pCount = 0; pCount < mPrimitivesCount; pCount ++) {
	Primitive_t * prim = mPrimitives[pCount];

	stream->addU8((uint8_t)prim->mPrimitive);

	if(prim->mIndexBuffer.get()) {
	stream->addU32(1);
	prim->mIndexBuffer->serialize(stream);
	}
	else {
	stream->addU32(0);
	}
	}
	}

	Mesh Mesh::createFromStream(Context rsc, IStream *stream)
	{
	// First make sure we are reading the correct object
	RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
	if(classID != RS_A3D_CLASS_ID_MESH) {
	LOGE("mesh loading skipped due to invalid class id");
	return NULL;
	}

	Mesh * mesh = new Mesh(rsc);

	String8 name;
	stream->loadString(&name);
	mesh->setName(name.string(), name.size());

	mesh->mVertexBufferCount = stream->loadU32();
	if(mesh->mVertexBufferCount) {
	mesh->mVertexBuffers = new ObjectBaseRef<Allocation>[mesh->mVertexBufferCount];

	for(uint32_t vCount = 0; vCount < mesh->mVertexBufferCount; vCount ++) {
	Allocation *vertexAlloc = Allocation::createFromStream(rsc, stream);
	mesh->mVertexBuffers[vCount].set(vertexAlloc);
	}
	}

	mesh->mPrimitivesCount = stream->loadU32();
	if(mesh->mPrimitivesCount) {
	mesh->mPrimitives = new Primitive_t *[mesh->mPrimitivesCount];

	// load all primitives
	for (uint32_t pCount = 0; pCount < mesh->mPrimitivesCount; pCount ++) {
	Primitive_t * prim = new Primitive_t;
	mesh->mPrimitives[pCount] = prim;

	prim->mPrimitive = (RsPrimitive)stream->loadU8();

	// Check to see if the index buffer was stored
	uint32_t isIndexPresent = stream->loadU32();
	if(isIndexPresent) {
	Allocation *indexAlloc = Allocation::createFromStream(rsc, stream);
	prim->mIndexBuffer.set(indexAlloc);
	}
	}
	}

	mesh->updateGLPrimitives();
	mesh->uploadAll(rsc);

	return mesh;
	}

	void Mesh::computeBBox() {
	float *posPtr = NULL;
	uint32_t vectorSize = 0;
	uint32_t stride = 0;
	uint32_t numVerts = 0;
	// First we need to find the position ptr and stride
	for (uint32_t ct=0; ct < mVertexBufferCount; ct++) {
	const Type *bufferType = mVertexBuffers[ct]->getType();
	const Element *bufferElem = bufferType->getElement();

	for (uint32_t ct=0; ct < bufferElem->getFieldCount(); ct++) {
	if(strcmp(bufferElem->getFieldName(ct), "position") == 0) {
	vectorSize = bufferElem->getField(ct)->getComponent().getVectorSize();
	stride = bufferElem->getSizeBytes() / sizeof(float);
	uint32_t offset = bufferElem->getFieldOffsetBytes(ct);
	posPtr = (float)((uint8_t)mVertexBuffers[ct]->getPtr() + offset);
	numVerts = bufferType->getDimX();
	break;
	}
	}
	if(posPtr) {
	break;
	}
	}

	mBBoxMin[0] = mBBoxMin[1] = mBBoxMin[2] = 1e6;
	mBBoxMax[0] = mBBoxMax[1] = mBBoxMax[2] = -1e6;
	if(!posPtr) {
	LOGE("Unable to compute bounding box");
	mBBoxMin[0] = mBBoxMin[1] = mBBoxMin[2] = 0.0f;
	mBBoxMax[0] = mBBoxMax[1] = mBBoxMax[2] = 0.0f;
	return;
	}

	for(uint32_t i = 0; i < numVerts; i ++) {
	for(uint32_t v = 0; v < vectorSize; v ++) {
	mBBoxMin[v] = rsMin(mBBoxMin[v], posPtr[v]);
	mBBoxMax[v] = rsMax(mBBoxMax[v], posPtr[v]);
	}
	posPtr += stride;
	}
	}


	MeshContext::MeshContext()
	{
	}

	MeshContext::~MeshContext()
	{
	}

	namespace android {
	namespace renderscript {

	RsMesh rsi_MeshCreate(Context *rsc, uint32_t vtxCount, uint32_t idxCount)
	{
	Mesh *sm = new Mesh(rsc);
	sm->incUserRef();

	sm->mPrimitivesCount = idxCount;
	sm->mPrimitives = new Mesh::Primitive_t *[sm->mPrimitivesCount];
	for(uint32_t ct = 0; ct < idxCount; ct ++) {
	sm->mPrimitives[ct] = new Mesh::Primitive_t;
	}

	sm->mVertexBufferCount = vtxCount;
	sm->mVertexBuffers = new ObjectBaseRef<Allocation>[vtxCount];

	return sm;
	}

	void rsi_MeshBindVertex(Context *rsc, RsMesh mv, RsAllocation va, uint32_t slot)
	{
	Mesh sm = static_cast<Mesh >(mv);
	rsAssert(slot < sm->mVertexBufferCount);

	sm->mVertexBuffers[slot].set((Allocation *)va);
	}

	void rsi_MeshBindIndex(Context *rsc, RsMesh mv, RsAllocation va, uint32_t primType, uint32_t slot)
	{
	Mesh sm = static_cast<Mesh >(mv);
	rsAssert(slot < sm->mPrimitivesCount);

	sm->mPrimitives[slot]->mIndexBuffer.set((Allocation *)va);
	sm->mPrimitives[slot]->mPrimitive = (RsPrimitive)primType;
	sm->updateGLPrimitives();
	}

	void rsi_MeshGetVertexBufferCount(Context rsc, RsMesh mv, int32_t numVtx)
	{
	Mesh sm = static_cast<Mesh >(mv);
	*numVtx = sm->mVertexBufferCount;
	}

	void rsi_MeshGetIndexCount(Context rsc, RsMesh mv, int32_t numIdx)
	{
	Mesh sm = static_cast<Mesh >(mv);
	*numIdx = sm->mPrimitivesCount;
	}

	void rsi_MeshGetVertices(Context rsc, RsMesh mv, RsAllocation vtxData, uint32_t vtxDataCount)
	{
	Mesh sm = static_cast<Mesh >(mv);
	rsAssert(vtxDataCount == sm->mVertexBufferCount);

	for(uint32_t ct = 0; ct < vtxDataCount; ct ++) {
	vtxData[ct] = sm->mVertexBuffers[ct].get();
	sm->mVertexBuffers[ct]->incUserRef();
	}
	}

	void rsi_MeshGetIndices(Context rsc, RsMesh mv, RsAllocation va, uint32_t *primType, uint32_t idxDataCount)
	{
	Mesh sm = static_cast<Mesh >(mv);
	rsAssert(idxDataCount == sm->mPrimitivesCount);

	for(uint32_t ct = 0; ct < idxDataCount; ct ++) {
	va[ct] = sm->mPrimitives[ct]->mIndexBuffer.get();
	primType[ct] = sm->mPrimitives[ct]->mPrimitive;
	if(sm->mPrimitives[ct]->mIndexBuffer.get()) {
	sm->mPrimitives[ct]->mIndexBuffer->incUserRef();
	}
	}

	}




	}}