Add msdfgen (#1770)

* Add msdfgen

* msdfgen: Disable extensions by default

* Fix mingw

* Fix MinGW

* Update xmake.lua

* Try to fix MinGW

* ¯\_(ツ)_/¯

* msdfgen: Disable shared compilation on MinGW/msys2

packages/m/msdfgen/xmake.lua

@@ -0,0 +1,97 @@
+package("msdfgen")
+    set_homepage("https://github.com/Chlumsky/msdfgen")
+    set_description("Multi-channel signed distance field generator")
+    set_license("MIT")
+
+    add_urls("https://github.com/Chlumsky/msdfgen/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/Chlumsky/msdfgen.git")
+    add_versions("v1.10", "2754d1687bfb80968d9c682e0c4c04c8fcf72df1421d076baf44ea0d87aa3662")
+    add_patches("v1.10", "https://github.com/Chlumsky/msdfgen/commit/839e0e86cb846e3ea0c0a3d5da97321fe81f91e4.patch", "f69096f65edb588dcb50529ac750fd5fb24b716e053cb9c33749e52219fd7df4")
+
+    add_configs("extensions", {description = "Build extensions library (requires freetype, libpng and tinyxml2)", default = false, type = "boolean"})
+    add_configs("openmpp", {description = "Build with OpenMP support for multi-threaded code", default = false, type = "boolean"})
+    add_configs("skia", {description = "Build with the Skia library", default = false, type = "boolean"})
+    add_configs("standalone", {description = "Build standalone executable", default = false, type = "boolean"})
+
+    -- shared compilation is not supported on mingw/msys2 because of the "export all symbol" CMake feature
+    if is_plat("mingw") and is_subhost("msys") then
+        add_configs("shared", {description = "Build shared library.", default = false, type = "boolean", readonly = true})
+    end
+
+    add_deps("cmake")
+
+    on_load(function (package)
+        if package:is_plat("windows", "mingw") and package:config("shared") then
+            package:add("defines", "MSDFGEN_PUBLIC=__declspec(dllimport)")
+        else
+            package:add("defines", "MSDFGEN_PUBLIC=")
+        end
+        if package:config("extensions") or package:config("standalone") then
+            package:add("deps", "freetype")
+            package:add("deps", "libpng")
+            package:add("deps", "tinyxml2")
+            package:add("links", "msdfgen-ext")
+            if package:config("skia") then
+                package:add("deps", "skia")
+            end
+        end
+        package:add("links", "msdfgen-core")
+    end)
+
+    on_install(function (package)
+        local configs = {}
+        table.insert(configs, "-DMSDFGEN_USE_VCPKG=OFF")
+        table.insert(configs, "-DMSDFGEN_DYNAMIC_RUNTIME=OFF")
+        table.insert(configs, "-DMSDFGEN_INSTALL=ON")
+        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
+        table.insert(configs, "-DMSDFGEN_CORE_ONLY=" .. ((package:config("extensions") or package:config("standalone")) and "OFF" or "ON"))
+        table.insert(configs, "-DMSDFGEN_BUILD_STANDALONE=" .. (package:config("standalone") and "ON" or "OFF"))
+        table.insert(configs, "-DMSDFGEN_USE_SKIA=" .. (package:config("skia") and "ON" or "OFF"))
+
+        if package:is_plat("windows") then
+            io.replace("CMakeLists.txt", [[set(MSDFGEN_MSVC_RUNTIME "MultiThreaded$<$<CONFIG:Debug>:Debug>")]], [[set(MSDFGEN_MSVC_RUNTIME, "${CMAKE_MSVC_RUNTIME_LIBRARY}")]], {plain = true})
+        elseif package:is_plat("mingw") then
+            if package:config("shared") then
+                table.insert(configs, "-DCMAKE_SUPPORT_WINDOWS_EXPORT_ALL_SYMBOLS=ON")
+            end
+            io.replace("CMakeLists.txt", [[if(BUILD_SHARED_LIBS AND WIN32)]], [[if(BUILD_SHARED_LIBS AND (WIN32 OR MINGW))]], {plain = true})
+        end
+
+        import("package.tools.cmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                using namespace msdfgen;
+                BitmapRef<float, 3> bitmap;
+                Shape shape;
+                Projection project;
+                generateMSDF(bitmap, shape, project, 1.0);
+            }
+        ]]}, {configs = { languages = "c++11" }, includes = {"msdfgen/msdfgen.h"}}))
+
+        if package:config("extensions") or package:config("standalone") then
+            assert(package:check_cxxsnippets({test = [[
+                void test() {
+                    using namespace msdfgen;
+                    FreetypeHandle* ft = initializeFreetype();
+                    FontHandle* font = loadFont(ft, "arialbd.ttf");
+
+                    Shape shape;
+                    loadGlyph(shape, font, 'A');
+                    shape.normalize();
+                    Bitmap<float, 3> msdf(32, 32);
+                    generateMSDF(msdf, shape, 4.0, 1.0, Vector2(4.0, 4.0));
+                    savePng(msdf, "output.png");
+
+                    destroyFont(font);
+                    deinitializeFreetype(ft);
+                }
+            ]]}, {configs = { languages = "c++11" }, includes = {"msdfgen/msdfgen.h", "msdfgen/msdfgen-ext.h"}}))
+
+            if package:config("standalone") then
+                os.vrun("msdfgen -help")
+            end
+        end
+    end)