From 19cbd92b85fee8858c108048d93208f9035d30a9 Mon Sep 17 00:00:00 2001
From: Evgeny Kurnevsky <kurnevsky@gmail.com>
Date: Wed, 5 Jun 2024 04:27:23 +0200
Subject: [PATCH] vtk: add vtk-dicom module

---
 pkgs/development/libraries/vtk/generic.nix | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/pkgs/development/libraries/vtk/generic.nix b/pkgs/development/libraries/vtk/generic.nix
index c67b4b843aad2..8218bd3bf80ef 100644
--- a/pkgs/development/libraries/vtk/generic.nix
+++ b/pkgs/development/libraries/vtk/generic.nix
@@ -16,7 +16,9 @@
   libXt,
   libpng,
   libtiff,
+  gdcm,
   fetchpatch,
+  fetchFromGitHub,
   enableQt ? false,
   qtx11extras,
   qttools,
@@ -25,6 +27,7 @@
   enablePython ? false,
   python ? throw "vtk: Python support requested, but no python interpreter was given.",
   enableEgl ? false,
+  enableVtkDicom ? true,
 }:
 
 let
@@ -64,6 +67,9 @@ stdenv.mkDerivation {
     ]
     ++ optionals enablePython [
       python
+    ]
+    ++ optionals enableVtkDicom [
+      (gdcm.override { enableVTK = false; })
     ];
   propagatedBuildInputs = optionals stdenv.hostPlatform.isLinux [
     libX11
@@ -75,11 +81,23 @@ stdenv.mkDerivation {
 
   # GCC 13: error: 'int64_t' in namespace 'std' does not name a type
   postPatch =
+    let
+      vtk-dicom = fetchFromGitHub {
+        owner = "dgobbi";
+        repo = "vtk-dicom";
+        tag = "v0.8.17";
+        hash = "sha256-1lI2qsV4gymWqjeouEHZ5FRlmlh9vimH7J5rzA+eOds=";
+      };
+    in
     ''
       sed '1i#include <cstdint>' \
         -i ThirdParty/libproj/vtklibproj/src/proj_json_streaming_writer.hpp \
         -i IO/Image/vtkSEPReader.h
     ''
+    + optionalString enableVtkDicom ''
+      cp -r ${vtk-dicom} ./Remote/vtkDICOM
+      chmod -R +w ./Remote/vtkDICOM
+    ''
     + optionalString stdenv.hostPlatform.isDarwin ''
       sed -i 's|COMMAND vtkHashSource|COMMAND "DYLD_LIBRARY_PATH=''${VTK_BINARY_DIR}/lib" ''${VTK_BINARY_DIR}/bin/vtkHashSource-${majorVersion}|' ./Parallel/Core/CMakeLists.txt
       sed -i 's/fprintf(output, shift)/fprintf(output, "%s", shift)/' ./ThirdParty/libxml2/vtklibxml2/xmlschemas.c
@@ -117,6 +135,11 @@ stdenv.mkDerivation {
     ++ optionals enablePython [
       "-DVTK_WRAP_PYTHON:BOOL=ON"
       "-DVTK_PYTHON_VERSION:STRING=${pythonMajor}"
+    ]
+    ++ optionals enableVtkDicom [
+      # Allows to read compressed dicom files:
+      # https://dgobbi.github.io/vtk-dicom/doc/api/installation.html
+      "-DUSE_GDCM=ON"
     ];
 
   env = lib.optionalAttrs stdenv.cc.isClang {