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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) 2018 NVIDIA Corporation. All rights reserved.
#include "ApexCustomBufferIterator.h"
#include "PsString.h"
namespace nvidia
{
namespace apex
{
ApexCustomBufferIterator::ApexCustomBufferIterator() :
mData(NULL),
mElemSize(0),
mMaxTriangles(0)
{
}
void ApexCustomBufferIterator::setData(void* data, uint32_t elemSize, uint32_t maxTriangles)
{
mData = (uint8_t*)data;
mElemSize = elemSize;
mMaxTriangles = maxTriangles;
}
void ApexCustomBufferIterator::addCustomBuffer(const char* name, RenderDataFormat::Enum format, uint32_t offset)
{
CustomBuffer buffer;
buffer.name = name;
buffer.offset = offset;
buffer.format = format;
mCustomBuffers.pushBack(buffer);
}
void* ApexCustomBufferIterator::getVertex(uint32_t triangleIndex, uint32_t vertexIndex) const
{
if (mData == NULL || triangleIndex >= mMaxTriangles)
{
return NULL;
}
return mData + mElemSize * (triangleIndex * 3 + vertexIndex);
}
int32_t ApexCustomBufferIterator::getAttributeIndex(const char* attributeName) const
{
if (attributeName == NULL || attributeName[0] == 0)
{
return -1;
}
for (uint32_t i = 0; i < mCustomBuffers.size(); i++)
{
if (nvidia::strcmp(mCustomBuffers[i].name, attributeName) == 0)
{
return (int32_t)i;
}
}
return -1;
}
void* ApexCustomBufferIterator::getVertexAttribute(uint32_t triangleIndex, uint32_t vertexIndex, const char* attributeName, RenderDataFormat::Enum& outFormat) const
{
outFormat = RenderDataFormat::UNSPECIFIED;
uint8_t* elementData = (uint8_t*)getVertex(triangleIndex, vertexIndex);
if (elementData == NULL)
{
return NULL;
}
for (uint32_t i = 0; i < mCustomBuffers.size(); i++)
{
if (nvidia::strcmp(mCustomBuffers[i].name, attributeName) == 0)
{
outFormat = mCustomBuffers[i].format;
return elementData + mCustomBuffers[i].offset;
}
}
return NULL;
}
void* ApexCustomBufferIterator::getVertexAttribute(uint32_t triangleIndex, uint32_t vertexIndex, uint32_t attributeIndex, RenderDataFormat::Enum& outFormat, const char*& outName) const
{
outFormat = RenderDataFormat::UNSPECIFIED;
outName = NULL;
uint8_t* elementData = (uint8_t*)getVertex(triangleIndex, vertexIndex);
if (elementData == NULL || attributeIndex >= mCustomBuffers.size())
{
return NULL;
}
outName = mCustomBuffers[attributeIndex].name;
outFormat = mCustomBuffers[attributeIndex].format;
return elementData + mCustomBuffers[attributeIndex].offset;
}
}
} // end namespace nvidia::apex
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