[libigl]Add port libigl, add features. (#8607)

* [libigl]Add port libigl, add features.

* [libigl]Re-generate patch.

* Trigger CI.

* [libigl]Correct homepage.

3 files changed, 323 insertions, 0 deletions

diff --git a/ports/libigl/CONTROL b/ports/libigl/CONTROL
new file mode 100644
index 000000000..93041cc4d
--- /dev/null
+++ b/ports/libigl/CONTROL
@@ -0,0 +1,37 @@
+Source: libigl
+Version: 2.1.0-1
+Homepage: https://github.com/libigl/libigl
+Description: libigl is a simple C++ geometry processing library. We have a wide functionality including construction of sparse discrete differential geometry operators and finite-elements matrices such as the cotangent Laplacian and diagonalized mass matrix, simple facet and edge-based topology data structures, mesh-viewing utilities for OpenGL and GLSL, and many core functions for matrix manipulation which make Eigen feel a lot more like MATLAB.
+Build-Depends: eigen3
+
+Feature: embree
+Description: Build with embree
+Build-Depends: embree3
+
+Feature: opengl
+Description: Build with opengl
+Build-Depends: opengl, glad
+
+Feature: glfw
+Description: Build with glfw
+Build-Depends: glfw3
+
+Feature: imgui
+Description: Build with imgui
+Build-Depends: imgui[example]
+
+Feature: png
+Description: Build with libpng
+Build-Depends: libpng, stb
+
+Feature: xml
+Description: Build with libxml
+Build-Depends: tinyxml2
+
+Feature: python
+Description: Build with python bind
+Build-Depends: pybind11
+
+Feature: test
+Description: Build test 
+Build-Depends: catch2
\ No newline at end of file
diff --git a/ports/libigl/fix-dependency.patch b/ports/libigl/fix-dependency.patch
new file mode 100644
index 000000000..06e3d0f7d
--- /dev/null
+++ b/ports/libigl/fix-dependency.patch
@@ -0,0 +1,213 @@
+diff --git a/cmake/libigl.cmake b/cmake/libigl.cmake
+index 7016cbf..3a6b4dd 100644
+--- a/cmake/libigl.cmake
++++ b/cmake/libigl.cmake
+@@ -96,8 +96,9 @@ if(UNIX)
+ endif()
+ 
+ # Eigen
+-if(TARGET Eigen3::Eigen)
++if(1)
+   # If an imported target already exists, use it
++  find_package(Eigen3 CONFIG REQUIRED)
+   target_link_libraries(igl_common INTERFACE Eigen3::Eigen)
+ else()
+   igl_download_eigen()
+@@ -182,7 +183,7 @@ compile_igl_module("core" ${SOURCES_IGL})
+ ################################################################################
+ ### Download the python part ###
+ if(LIBIGL_WITH_PYTHON)
+-  igl_download_pybind11()
++  #igl_download_pybind11()
+ endif()
+ 
+ ################################################################################
+@@ -281,7 +282,8 @@ if(LIBIGL_WITH_EMBREE)
+     set(EMBREE_STATIC_RUNTIME ON CACHE BOOL " " FORCE)
+   endif()
+ 
+-  if(NOT TARGET embree)
++  find_package(embree 3 CONFIG REQUIRED)
++  if(0)
+     # TODO: Should probably save/restore the CMAKE_CXX_FLAGS_*, since embree seems to be
+     # overriding them on Windows. But well... it works for now.
+     igl_download_embree()
+@@ -289,7 +291,7 @@ if(LIBIGL_WITH_EMBREE)
+   endif()
+ 
+   compile_igl_module("embree")
+-  target_link_libraries(igl_embree ${IGL_SCOPE} embree)
++  target_link_libraries(igl_embree ${IGL_SCOPE} sys math simd embree)
+   target_include_directories(igl_embree ${IGL_SCOPE} ${EMBREE_DIR}/include)
+   target_compile_definitions(igl_embree ${IGL_SCOPE} -DEMBREE_STATIC_LIB)
+ endif()
+@@ -332,11 +334,12 @@ if(LIBIGL_WITH_OPENGL)
+   endif()
+ 
+   # glad module
+-  if(NOT TARGET glad)
++  find_package(glad CONFIG REQUIRED)
++  if(0)
+     igl_download_glad()
+     add_subdirectory(${LIBIGL_EXTERNAL}/glad glad)
+   endif()
+-  target_link_libraries(igl_opengl ${IGL_SCOPE} glad)
++  target_link_libraries(igl_opengl ${IGL_SCOPE} glad::glad)
+ endif()
+ 
+ ################################################################################
+@@ -345,7 +348,8 @@ if(LIBIGL_WITH_OPENGL_GLFW)
+   if(TARGET igl::opengl)
+     # GLFW module
+     compile_igl_module("opengl/glfw")
+-    if(NOT TARGET glfw)
++    find_package(glfw3 CONFIG REQUIRED)
++    if(0)
+       set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL " " FORCE)
+       set(GLFW_BUILD_TESTS OFF CACHE BOOL " " FORCE)
+       set(GLFW_BUILD_DOCS OFF CACHE BOOL " " FORCE)
+@@ -363,9 +367,10 @@ if(LIBIGL_WITH_OPENGL_GLFW_IMGUI)
+   if(TARGET igl::opengl_glfw)
+     # ImGui module
+     compile_igl_module("opengl/glfw/imgui")
+-    if(NOT TARGET imgui)
++    find_package(imgui CONFIG REQUIRED)
++    if(0)
+       igl_download_imgui()
+-      add_subdirectory(${LIBIGL_EXTERNAL}/libigl-imgui imgui)
++      add_subdirectory(${LIBIGL_EXTERNAL}/libigl-imgui imgui::imgui)
+     endif()
+     target_link_libraries(igl_opengl_glfw_imgui ${IGL_SCOPE} igl_opengl_glfw imgui)
+   endif()
+@@ -377,12 +382,21 @@ if(LIBIGL_WITH_PNG)
+   # png/ module is anomalous because it also depends on opengl it really should
+   # be moved into the opengl/ directory and namespace ...
+   if(TARGET igl_opengl)
+-    if(NOT TARGET stb_image)
++    find_path(stb_include_dir stb.h)
++    find_package(opengl REQUIRED)
++    find_package(libpng CONFIG REQUIRED)
++    if (BUILD_SHARED_LIBS)
++        set(libpng_LIBRARIES png)
++    else()
++        set(libpng_LIBRARIES png_static)
++    endif()
++    if(0)
+       igl_download_stb()
+       add_subdirectory(${LIBIGL_EXTERNAL}/stb stb_image)
+     endif()
+     compile_igl_module("png" "")
+-    target_link_libraries(igl_png ${IGL_SCOPE} igl_stb_image igl_opengl)
++    target_include_directories(igl_png PUBLIC ${stb_include_dir})
++    target_link_libraries(igl_png ${IGL_SCOPE} OpenGL::GL ${libpng_LIBRARIES})
+   endif()
+ endif()
+ 
+@@ -430,7 +444,8 @@ endif()
+ ### Compile the xml part ###
+ if(LIBIGL_WITH_XML)
+   set(TINYXML2_DIR "${LIBIGL_EXTERNAL}/tinyxml2")
+-  if(NOT TARGET tinyxml2)
++  find_package(tinyxml2 CONFIG REQUIRED)
++  if(0)
+     igl_download_tinyxml2()
+     add_library(tinyxml2 STATIC ${TINYXML2_DIR}/tinyxml2.cpp ${TINYXML2_DIR}/tinyxml2.h)
+     target_include_directories(tinyxml2 PUBLIC ${TINYXML2_DIR})
+@@ -440,7 +455,7 @@ if(LIBIGL_WITH_XML)
+             SOVERSION "3")
+   endif()
+   compile_igl_module("xml")
+-  target_link_libraries(igl_xml ${IGL_SCOPE} tinyxml2)
++  target_link_libraries(igl_xml ${IGL_SCOPE} tinyxml2::tinyxml2)
+   target_include_directories(igl_xml ${IGL_SCOPE} ${TINYXML2_DIR})
+ endif()
+ 
+diff --git a/include/igl/opengl/glfw/imgui/ImGuiHelpers.h b/include/igl/opengl/glfw/imgui/ImGuiHelpers.h
+index 1d3e3bc..682b6d7 100644
+--- a/include/igl/opengl/glfw/imgui/ImGuiHelpers.h
++++ b/include/igl/opengl/glfw/imgui/ImGuiHelpers.h
+@@ -10,7 +10,7 @@
+ 
+ ////////////////////////////////////////////////////////////////////////////////
+ #include "ImGuiTraits.h"
+-#include <imgui/imgui.h>
++#include <imgui.h>
+ #include <vector>
+ #include <string>
+ #include <algorithm>
+diff --git a/include/igl/opengl/glfw/imgui/ImGuiMenu.cpp b/include/igl/opengl/glfw/imgui/ImGuiMenu.cpp
+index 3939b03..835b208 100644
+--- a/include/igl/opengl/glfw/imgui/ImGuiMenu.cpp
++++ b/include/igl/opengl/glfw/imgui/ImGuiMenu.cpp
+@@ -9,7 +9,7 @@
+ #include "ImGuiMenu.h"
+ #include "ImGuiHelpers.h"
+ #include <igl/project.h>
+-#include <imgui/imgui.h>
++#include <imgui.h>
+ #include <imgui_impl_glfw.h>
+ #include <imgui_impl_opengl3.h>
+ #include <imgui_fonts_droid_sans.h>
+diff --git a/include/igl/opengl/glfw/imgui/ImGuiTraits.h b/include/igl/opengl/glfw/imgui/ImGuiTraits.h
+index fbc892f..e8828b1 100644
+--- a/include/igl/opengl/glfw/imgui/ImGuiTraits.h
++++ b/include/igl/opengl/glfw/imgui/ImGuiTraits.h
+@@ -8,7 +8,7 @@
+ #ifndef IGL_OPENGL_GLFW_IMGUI_IMGUITRAITS_H
+ #define IGL_OPENGL_GLFW_IMGUI_IMGUITRAITS_H
+ 
+-#include <imgui/imgui.h>
++#include <imgui.h>
+ 
+ // Extend ImGui by populating its namespace directly
+ namespace ImGui
+diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
+index 7a14775..f5c84a8 100644
+--- a/python/CMakeLists.txt
++++ b/python/CMakeLists.txt
+@@ -23,8 +23,8 @@ endif()
+ # set(PYTHON_INCLUDE_DIR "/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/include/python3.5m")
+ 
+ set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6 3.7)
+-find_package(PythonInterp 3.4 REQUIRED)
+-find_package(PythonLibs 3.4 REQUIRED)
++find_package(PythonInterp REQUIRED)
++find_package(PythonLibs REQUIRED)
+ 
+ ## libigl
+ if(NOT TARGET igl::core)
+diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
+index 8a0af13..5c6a350 100644
+--- a/tests/CMakeLists.txt
++++ b/tests/CMakeLists.txt
+@@ -11,16 +11,14 @@ else()
+ endif()
+ 
+ ### Download data
+-igl_download_test_data()
+ set(IGL_TEST_DATA ${LIBIGL_EXTERNAL}/../tests/data)
+ 
+ ### Download Catch2 unit test framework
+-igl_download_catch2()
++find_package(Catch2 CONFIG REQUIRED)
+ list(APPEND CMAKE_MODULE_PATH ${LIBIGL_EXTERNAL}/catch2/contrib)
+ 
+ 
+ # Add catch2
+-add_subdirectory(${LIBIGL_EXTERNAL}/catch2 catch2)
+ 
+ 
+ # Create test executable
+diff --git a/tutorial/106_ViewerMenu/main.cpp b/tutorial/106_ViewerMenu/main.cpp
+index 09f3272..9e1a19d 100644
+--- a/tutorial/106_ViewerMenu/main.cpp
++++ b/tutorial/106_ViewerMenu/main.cpp
+@@ -2,7 +2,7 @@
+ #include <igl/opengl/glfw/Viewer.h>
+ #include <igl/opengl/glfw/imgui/ImGuiMenu.h>
+ #include <igl/opengl/glfw/imgui/ImGuiHelpers.h>
+-#include <imgui/imgui.h>
++#include <imgui.h>
+ #include <iostream>
+ #include "tutorial_shared_path.h"
+ 
diff --git a/ports/libigl/portfile.cmake b/ports/libigl/portfile.cmake
new file mode 100644
index 000000000..6407ca812
--- /dev/null
+++ b/ports/libigl/portfile.cmake
@@ -0,0 +1,73 @@
+vcpkg_fail_port_install(ON_ARCH "arm" "arm64" ON_TARGET "uwp")
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO libigl/libigl
+    REF  f6b406427400ed7ddb56cfc2577b6af571827c8c #2.1.0
+    SHA512 262f0b16e6c018d86d11a7cc90f8f4f8088fa7190634a7cd5cc392ebdefe47e2218b4f9276e411498ae0001d66d0207f4108c87c5090e3a39df4a2760930e945
+    HEAD_REF master
+    PATCHES fix-dependency.patch
+)
+
+set(LIBIGL_BUILD_STATIC OFF)
+if (VCPKG_LIBRARY_LINKAGE STREQUAL static)
+    set(LIBIGL_BUILD_STATIC ON)
+endif()
+
+if ("python" IN_LIST FEATURES)
+    vcpkg_find_acquire_program(PYTHON2)
+    get_filename_component(PYTHON2_DIR ${PYTHON2} DIRECTORY)
+    set(ENV{PATH} "$ENV{PATH};${PYTHON2_DIR}")
+endif()
+
+if ("test" IN_LIST FEATURES AND NOT EXISTS ${SOURCE_PATH}/tests/data)
+    set(TEST_SOURCE_PATH ${SOURCE_PATH}/tests/data)
+    file(MAKE_DIRECTORY ${TEST_SOURCE_PATH})
+    vcpkg_from_github(
+        OUT_SOURCE_PATH ${TEST_SOURCE_PATH}
+        REPO libigl/libigl-tests-data
+        REF  0689abc55bc12825e6c01ac77446f742839ff277
+        SHA512 2b6aec21ed39a9fd534da86fff75eee0f94a3ea2db2fb9dd28974636cc34936341cc28dfcf3bb07cf79409124342717e001c529dc887da72c85fe314b0eb6ea6
+        HEAD_REF master
+    )
+endif()
+
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    embree LIBIGL_WITH_EMBREE
+    opengl LIBIGL_WITH_OPENGL
+    glfw LIBIGL_WITH_OPENGL_GLFW
+    imgui LIBIGL_WITH_OPENGL_GLFW_IMGUI
+    png LIBIGL_WITH_PNG
+    xml LIBIGL_WITH_XML
+    python LIBIGL_WITH_PYTHON
+    test LIBIGL_BUILD_TESTS
+)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS ${FEATURE_OPTIONS}
+        -DLIBIGL_BUILD_PYTHON=OFF
+        -DLIBIGL_EXPORT_TARGETS=ON
+        -DLIBIGL_USE_STATIC_LIBRARY=${LIBIGL_BUILD_STATIC}
+        -DLIBIGL_WITH_COMISO=OFF
+        -DLIBIGL_WITH_TETGEN=OFF
+        -DLIBIGL_WITH_TRIANGLE=OFF
+        -DLIBIGL_WITH_PREDICATES=OFF
+        -DLIBIGL_BUILD_TUTORIALS=OFF
+		-DPYTHON_EXECUTABLE=${PYTHON2}
+)
+
+vcpkg_install_cmake()
+
+vcpkg_fixup_cmake_targets(CONFIG_PATH share/libigl/cmake)
+vcpkg_copy_pdbs()
+
+if (NOT LIBIGL_BUILD_STATIC)
+    # For dynamic build, libigl is a header-only library.
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug)
+endif()
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include ${CURRENT_PACKAGES_DIR}/debug/share)
+
+file(INSTALL ${SOURCE_PATH}/LICENSE.GPL DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)
+