add nanogui (#720)

* add nanogui

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

* Update xmake.lua

packages/n/nanogui/xmake.lua

@@ -0,0 +1,58 @@
+package("nanogui")
+
+    set_homepage("https://github.com/wjakob/nanogui")
+    set_description("Minimalistic GUI library for OpenGL")
+
+    add_urls("https://github.com/wjakob/nanogui.git")
+    add_versions("2019.9.23", "e9ec8a1a9861cf578d9c6e85a6420080aa715c03")
+
+    add_deps("cmake", "eigen", "glfw", "nanovg")
+    if is_plat("linux") then
+        add_deps("libxi", "libxcursor", "libxinerama", "libxrandr", "libxxf86vm")
+    end
+
+    if is_plat("macosx") then
+        add_frameworks("CoreFoundation", "CoreGraphics", "CoreVideo", "IOKit", "AppKit")
+    elseif is_plat("windows") then
+        add_syslinks("comdlg32")
+    end
+
+    on_install("windows", "macosx", "linux", function (package)
+        local configs = {"-DNANOGUI_BUILD_EXAMPLE=OFF", "-DNANOGUI_BUILD_PYTHON=OFF"}
+        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
+        table.insert(configs, "-DNANOGUI_BUILD_SHARED=" .. (package:config("shared") and "ON" or "OFF"))
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        io.replace("CMakeLists.txt", '$<TARGET_OBJECTS:glfw_objects>', "", {plain = true})
+        io.replace("CMakeLists.txt", 'ext/nanovg/src/nanovg.c', "", {plain = true})
+        io.replace("CMakeLists.txt", 'add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/ext/glfw" "ext_build/glfw")', "", {plain = true})
+        io.replace("CMakeLists.txt", 'set_target_properties(glfw PROPERTIES EXCLUDE_FROM_ALL 1 EXCLUDE_FROM_DEFAULT_BUILD 1)', "", {plain = true})
+        if package:is_plat("linux", "windows") then
+            io.replace("include/nanogui/opengl.h", '#include <nanovg.h>', [[#include <nanovg.h>
+#ifdef _MSC_VER
+#   include <windows.h>
+#   define glUniform1i(...) // FIXME: indentify not found
+#endif
+#include <GL/gl.h>]], {plain = true})
+        end
+        os.rm("ext/eigen")
+        local packagedeps = {"eigen", "nanovg", "glfw"}
+        if package:is_plat("linux") then
+            table.join2(packagedeps, "libxi", "libxcursor", "libxinerama", "libxrandr", "libxxf86vm")
+            io.replace("CMakeLists.txt", 'target_link_libraries(nanogui ${NANOGUI_EXTRA_LIBS})',
+                'target_link_libraries(nanogui ${NANOGUI_EXTRA_LIBS} nanovg)', {plain = true})
+        end
+        import("package.tools.cmake").install(package, configs, {packagedeps = packagedeps})
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <iostream>
+            #include <nanogui/nanogui.h>
+            using namespace std;
+            using namespace nanogui;
+            void test() {
+                Button *b = new Button(NULL/*window*/, "Plain button");
+                b->setCallback([] { cout << "pushed!" << endl; });
+            }
+        ]]}, {configs = {languages = "c++11"}}))
+    end)