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/*
* Copyright (c) 2008-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#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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