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#pragma once
/**
* @file buffer_util.inl
* @brief LL GLTF Implementation
*
* $LicenseInfo:firstyear=2024&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2024, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
// inline template implementations for copying data out of GLTF buffers
// DO NOT include from header files to avoid the need to rebuild the whole project
// whenever we add support for more types
#ifdef _MSC_VER
#define LL_FUNCSIG __FUNCSIG__
#else
#define LL_FUNCSIG __PRETTY_FUNCTION__
#endif
namespace LL
{
namespace GLTF
{
// copy one Scalar from src to dst
template<class S, class T>
static void copyScalar(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec2 from src to dst
template<class S, class T>
static void copyVec2(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec3 from src to dst
template<class S, class T>
static void copyVec3(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec4 from src to dst
template<class S, class T>
static void copyVec4(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec2 from src to dst
template<class S, class T>
static void copyMat2(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec3 from src to dst
template<class S, class T>
static void copyMat3(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
// copy one vec4 from src to dst
template<class S, class T>
static void copyMat4(S* src, T& dst)
{
LL_ERRS() << "TODO: implement " << LL_FUNCSIG << LL_ENDL;
}
//=========================================================================================================
// concrete implementations for different types of source and destination
//=========================================================================================================
// suppress unused function warning -- clang complains here but these specializations are definitely used
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#endif
template<>
void copyScalar<F32, F32>(F32* src, F32& dst)
{
dst = *src;
}
template<>
void copyScalar<U32, U32>(U32* src, U32& dst)
{
dst = *src;
}
template<>
void copyScalar<U32, U16>(U32* src, U16& dst)
{
dst = *src;
}
template<>
void copyScalar<U16, U16>(U16* src, U16& dst)
{
dst = *src;
}
template<>
void copyScalar<U16, U32>(U16* src, U32& dst)
{
dst = *src;
}
template<>
void copyScalar<U8, U16>(U8* src, U16& dst)
{
dst = *src;
}
template<>
void copyScalar<U8, U32>(U8* src, U32& dst)
{
dst = *src;
}
template<>
void copyVec2<F32, LLVector2>(F32* src, LLVector2& dst)
{
dst.set(src[0], src[1]);
}
template<>
void copyVec3<F32, glh::vec3f>(F32* src, glh::vec3f& dst)
{
dst.set_value(src[0], src[1], src[2]);
}
template<>
void copyVec3<F32, LLVector4a>(F32* src, LLVector4a& dst)
{
dst.load3(src);
}
template<>
void copyVec3<U16, LLColor4U>(U16* src, LLColor4U& dst)
{
dst.set(src[0], src[1], src[2], 255);
}
template<>
void copyVec4<U8, LLColor4U>(U8* src, LLColor4U& dst)
{
dst.set(src[0], src[1], src[2], src[3]);
}
template<>
void copyVec4<U16, LLColor4U>(U16* src, LLColor4U& dst)
{
dst.set(src[0], src[1], src[2], src[3]);
}
template<>
void copyVec4<F32, LLColor4U>(F32* src, LLColor4U& dst)
{
dst.set(src[0]*255, src[1]*255, src[2]*255, src[3]*255);
}
template<>
void copyVec4<F32, LLVector4a>(F32* src, LLVector4a& dst)
{
dst.loadua(src);
}
template<>
void copyVec4<U16, LLVector4a>(U16* src, LLVector4a& dst)
{
dst.set(src[0], src[1], src[2], src[3]);
}
template<>
void copyVec4<U8, LLVector4a>(U8* src, LLVector4a& dst)
{
dst.set(src[0], src[1], src[2], src[3]);
}
template<>
void copyVec4<F32, glh::quaternionf>(F32* src, glh::quaternionf& dst)
{
dst.set_value(src);
}
template<>
void copyMat4<F32, glh::matrix4f>(F32* src, glh::matrix4f& dst)
{
dst.set_value(src);
}
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
//=========================================================================================================
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyScalar(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyScalar(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyVec2(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyVec2(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyVec3(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyVec3(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyVec4(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyVec4(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyMat2(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyMat2(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyMat3(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyMat3(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
// copy from src to dst, stride is the number of bytes between each element in src, count is number of elements to copy
template<class S, class T>
static void copyMat4(S* src, LLStrider<T> dst, S32 stride, S32 count)
{
for (S32 i = 0; i < count; ++i)
{
copyMat4(src, *dst);
dst++;
src = (S*)((U8*)src + stride);
}
}
template<class S, class T>
static void copy(Asset& asset, Accessor& accessor, const S* src, LLStrider<T>& dst, S32 byteStride)
{
if (accessor.mType == (S32)Accessor::Type::SCALAR)
{
S32 stride = byteStride == 0 ? sizeof(S) * 1 : byteStride;
copyScalar((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::VEC2)
{
S32 stride = byteStride == 0 ? sizeof(S) * 2 : byteStride;
copyVec2((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::VEC3)
{
S32 stride = byteStride == 0 ? sizeof(S) * 3 : byteStride;
copyVec3((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::VEC4)
{
S32 stride = byteStride == 0 ? sizeof(S) * 4 : byteStride;
copyVec4((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::MAT2)
{
S32 stride = byteStride == 0 ? sizeof(S) * 4 : byteStride;
copyMat2((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::MAT3)
{
S32 stride = byteStride == 0 ? sizeof(S) * 9 : byteStride;
copyMat3((S*)src, dst, stride, accessor.mCount);
}
else if (accessor.mType == (S32)Accessor::Type::MAT4)
{
S32 stride = byteStride == 0 ? sizeof(S) * 16 : byteStride;
copyMat4((S*)src, dst, stride, accessor.mCount);
}
else
{
LL_ERRS("GLTF") << "Unsupported accessor type" << LL_ENDL;
}
}
// copy data from accessor to strider
template<class T>
static void copy(Asset& asset, Accessor& accessor, LLStrider<T>& dst)
{
const BufferView& bufferView = asset.mBufferViews[accessor.mBufferView];
const Buffer& buffer = asset.mBuffers[bufferView.mBuffer];
const U8* src = buffer.mData.data() + bufferView.mByteOffset + accessor.mByteOffset;
if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_FLOAT)
{
LL::GLTF::copy(asset, accessor, (const F32*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT)
{
LL::GLTF::copy(asset, accessor, (const U16*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT)
{
LL::GLTF::copy(asset, accessor, (const U32*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE)
{
LL::GLTF::copy(asset, accessor, (const U8*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_SHORT)
{
LL::GLTF::copy(asset, accessor, (const S16*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_BYTE)
{
LL::GLTF::copy(asset, accessor, (const S8*)src, dst, bufferView.mByteStride);
}
else if (accessor.mComponentType == TINYGLTF_COMPONENT_TYPE_DOUBLE)
{
LL::GLTF::copy(asset, accessor, (const F64*)src, dst, bufferView.mByteStride);
}
else
{
LL_ERRS("GLTF") << "Unsupported component type" << LL_ENDL;
}
}
// copy data from accessor to vector
template<class T>
static void copy(Asset& asset, Accessor& accessor, std::vector<T>& dst)
{
dst.resize(accessor.mCount);
LLStrider<T> strider = dst.data();
copy(asset, accessor, strider);
}
}
}
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