Add cstdint include to rasterizer_impl.h

[stephane-caron]

Adding this include fixes the error

namespace "std" has no member "uintptr_t"

that may occur when trying to build the wheel (it happens when running pip install on my machine).

Detailed error log

Here is a full log of the corresponding error for reference:

  Building wheel for diff_surfel_rasterization (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [95 lines of output]
      running bdist_wheel
      /home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/utils/cpp_extension.py:529: UserWarning: Attempted to use ninja as the BuildExtension backend but we could not find ninja.. Falling back to using the slow distutils backend.
        warnings.warn(msg.format('we could not find ninja.'))
      running build
      running build_py
      creating build/lib.linux-x86_64-cpython-312/diff_surfel_rasterization
      copying diff_surfel_rasterization/__init__.py -> build/lib.linux-x86_64-cpython-312/diff_surfel_rasterization
      running build_ext
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      /home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/utils/cpp_extension.py:448: UserWarning: The detected CUDA version (12.8) has a minor version mismatch with the version that was used to compile PyTorch (12.6). Most likely this shouldn't be a problem.
        warnings.warn(CUDA_MISMATCH_WARN.format(cuda_str_version, torch.version.cuda))
      /home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/utils/cpp_extension.py:458: UserWarning: There are no /home/stephane-caron/.micromamba/envs/vision/bin/x86_64-conda-linux-gnu-c++ version bounds defined for CUDA version 12.8
        warnings.warn(f'There are no {compiler_name} version bounds defined for CUDA version {cuda_str_version}')
      building 'diff_surfel_rasterization._C' extension
      creating build/temp.linux-x86_64-cpython-312/cuda_rasterizer
      /home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/utils/cpp_extension.py:2073: UserWarning: TORCH_CUDA_ARCH_LIST is not set, all archs for visible cards are included for compilation.
      If this is not desired, please set os.environ['TORCH_CUDA_ARCH_LIST'].
        warnings.warn(
      /home/stephane-caron/.micromamba/envs/vision/bin/nvcc -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/torch/csrc/api/include -I/home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/include -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/python3.12 -c cuda_rasterizer/backward.cu -o build/temp.linux-x86_64-cpython-312/cuda_rasterizer/backward.o -D__CUDA_NO_HALF_OPERATORS__ -D__CUDA_NO_HALF_CONVERSIONS__ -D__CUDA_NO_BFLOAT16_CONVERSIONS__ -D__CUDA_NO_HALF2_OPERATORS__ --expt-relaxed-constexpr --compiler-options '-fPIC' -I/home/stephane-caron/src/rubah/vision/third_party/2d-gaussian-splatting/submodules/diff-surfel-rasterization/third_party/glm/ -DTORCH_API_INCLUDE_EXTENSION_H -DPYBIND11_COMPILER_TYPE=\"_gcc\" -DPYBIND11_STDLIB=\"_libstdcpp\" -DPYBIND11_BUILD_ABI=\"_cxxabi1018\" -DTORCH_EXTENSION_NAME=_C -D_GLIBCXX_USE_CXX11_ABI=1 -gencode=arch=compute_86,code=compute_86 -gencode=arch=compute_86,code=sm_86 -ccbin /home/stephane-caron/.micromamba/envs/vision/bin/x86_64-conda-linux-gnu-cc -std=c++17
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      cuda_rasterizer/auxiliary.h(197): warning #177-D: variable "p_proj" was declared but never referenced
         float3 p_proj = { p_hom.x * p_w, p_hom.y * p_w, p_hom.z * p_w };
                ^

      Remark: The warnings can be suppressed with "-diag-suppress <warning-number>"

      cuda_rasterizer/backward.cu(321): warning #177-D: variable "w" was declared but never referenced
           const float w = alpha * T;
                       ^

      cuda_rasterizer/backward.cu(212): warning #177-D: variable "dL_dmax_dweight" was declared but never referenced
         float dL_dmax_dweight;
               ^

      cuda_rasterizer/backward.cu(248): warning #177-D: variable "ddelx_dx" was declared but never referenced
         const float ddelx_dx = 0.5 * W;
                     ^

      cuda_rasterizer/backward.cu(249): warning #177-D: variable "ddely_dy" was declared but never referenced
         const float ddely_dy = 0.5 * H;
                     ^

      /home/stephane-caron/.micromamba/envs/vision/bin/nvcc -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/torch/csrc/api/include -I/home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/include -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/python3.12 -c cuda_rasterizer/forward.cu -o build/temp.linux-x86_64-cpython-312/cuda_rasterizer/forward.o -D__CUDA_NO_HALF_OPERATORS__ -D__CUDA_NO_HALF_CONVERSIONS__ -D__CUDA_NO_BFLOAT16_CONVERSIONS__ -D__CUDA_NO_HALF2_OPERATORS__ --expt-relaxed-constexpr --compiler-options '-fPIC' -I/home/stephane-caron/src/rubah/vision/third_party/2d-gaussian-splatting/submodules/diff-surfel-rasterization/third_party/glm/ -DTORCH_API_INCLUDE_EXTENSION_H -DPYBIND11_COMPILER_TYPE=\"_gcc\" -DPYBIND11_STDLIB=\"_libstdcpp\" -DPYBIND11_BUILD_ABI=\"_cxxabi1018\" -DTORCH_EXTENSION_NAME=_C -D_GLIBCXX_USE_CXX11_ABI=1 -gencode=arch=compute_86,code=compute_86 -gencode=arch=compute_86,code=sm_86 -ccbin /home/stephane-caron/.micromamba/envs/vision/bin/x86_64-conda-linux-gnu-cc -std=c++17
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      cuda_rasterizer/auxiliary.h(197): warning #177-D: variable "p_proj" was declared but never referenced
         float3 p_proj = { p_hom.x * p_w, p_hom.y * p_w, p_hom.z * p_w };
                ^

      Remark: The warnings can be suppressed with "-diag-suppress <warning-number>"

      /home/stephane-caron/.micromamba/envs/vision/bin/nvcc -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/torch/csrc/api/include -I/home/stephane-caron/.micromamba/envs/vision/lib/python3.12/site-packages/torch/include -I/home/stephane-caron/.micromamba/envs/vision/include -I/home/stephane-caron/.micromamba/envs/vision/include/python3.12 -c cuda_rasterizer/rasterizer_impl.cu -o build/temp.linux-x86_64-cpython-312/cuda_rasterizer/rasterizer_impl.o -D__CUDA_NO_HALF_OPERATORS__ -D__CUDA_NO_HALF_CONVERSIONS__ -D__CUDA_NO_BFLOAT16_CONVERSIONS__ -D__CUDA_NO_HALF2_OPERATORS__ --expt-relaxed-constexpr --compiler-options '-fPIC' -I/home/stephane-caron/src/rubah/vision/third_party/2d-gaussian-splatting/submodules/diff-surfel-rasterization/third_party/glm/ -DTORCH_API_INCLUDE_EXTENSION_H -DPYBIND11_COMPILER_TYPE=\"_gcc\" -DPYBIND11_STDLIB=\"_libstdcpp\" -DPYBIND11_BUILD_ABI=\"_cxxabi1018\" -DTORCH_EXTENSION_NAME=_C -D_GLIBCXX_USE_CXX11_ABI=1 -gencode=arch=compute_86,code=compute_86 -gencode=arch=compute_86,code=sm_86 -ccbin /home/stephane-caron/.micromamba/envs/vision/bin/x86_64-conda-linux-gnu-cc -std=c++17
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      nvcc warning : incompatible redefinition for option 'compiler-bindir', the last value of this option was used
      cuda_rasterizer/rasterizer_impl.h(24): error: namespace "std" has no member "uintptr_t"
          std::size_t offset = (reinterpret_cast<std::uintptr_t>(chunk) + alignment - 1) & ~(alignment - 1);
                                                      ^

      cuda_rasterizer/rasterizer_impl.h(40): error: identifier "uint32_t" is undefined
          uint32_t* point_offsets;
          ^

      cuda_rasterizer/rasterizer_impl.h(41): error: identifier "uint32_t" is undefined
          uint32_t* tiles_touched;
          ^

      cuda_rasterizer/rasterizer_impl.h(49): error: identifier "uint32_t" is undefined
          uint32_t* n_contrib;
          ^

      cuda_rasterizer/rasterizer_impl.h(58): error: identifier "uint64_t" is undefined
          uint64_t* point_list_keys_unsorted;
          ^

      cuda_rasterizer/rasterizer_impl.h(59): error: identifier "uint64_t" is undefined
          uint64_t* point_list_keys;
          ^

      cuda_rasterizer/rasterizer_impl.h(60): error: identifier "uint32_t" is undefined
          uint32_t* point_list_unsorted;
          ^

      cuda_rasterizer/rasterizer_impl.h(61): error: identifier "uint32_t" is undefined
          uint32_t* point_list;
          ^

      cuda_rasterizer/rasterizer_impl.cu(184): warning #549-D: variable "binning" is used before its value is set
         obtain(chunk, binning.point_list, P, 128);
                       ^

      Remark: The warnings can be suppressed with "-diag-suppress <warning-number>"

      8 errors detected in the compilation of "cuda_rasterizer/rasterizer_impl.cu".
      error: command '/home/stephane-caron/.micromamba/envs/vision/bin/nvcc' failed with exit code 2
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for diff_surfel_rasterization