Add freetype and wchar32 options to imgui (#1217)

* update taskflow

* update magic enum to v0.8.0

* remove irrelevant code

* add freetype options

* add wchar32 option

* adjust code structure

packages/i/imgui/port/xmake.lua

@@ -0,0 +1,65 @@
+add_rules("mode.debug", "mode.release")
+option("wchar32",      {showmenu = true,  default = false})
+option("freetype",     {showmenu = true,  default = false})
+option("glfw_opengl3", {showmenu = true,  default = false})
+option("user_config",  {showmenu = true,  default = nil, type = "string"})
+option("use_glad",     {showmenu = true,  default = false})
+
+
+if has_config("freetype") then 
+    add_requires("freetype")
+end
+
+if has_config("glfw_opengl3") then
+    add_requires("glfw")
+    if has_config("use_glad") then
+        add_requires("glad")
+    end
+end
+
+target("imgui")
+    set_kind("static")
+    add_files("*.cpp")
+    add_headerfiles("*.h")
+    add_includedirs(".")
+
+    if has_config("wchar32") then
+        add_headerfiles("misc/freetype/imgui_freetype.h")
+        add_files("misc/freetype/imgui_freetype.cpp")
+        add_defines("IMGUI_USE_WCHAR32")
+    end
+
+    if has_config("freetype") then
+        add_headerfiles("misc/freetype/imgui_freetype.h")
+        add_files("misc/freetype/imgui_freetype.cpp")
+        add_packages("freetype")
+        add_defines("IMGUI_ENABLE_FREETYPE")
+    end
+
+    if has_config("glfw_opengl3") then
+        add_files("backends/imgui_impl_glfw.cpp", "backends/imgui_impl_opengl3.cpp")
+        add_headerfiles("backends/imgui_impl_glfw.h", "backends/imgui_impl_opengl3.h")
+        add_packages("glfw")
+        if has_config("use_glad") then
+            add_defines("IMGUI_IMPL_OPENGL_LOADER_GLAD")
+            add_packages("glad")
+        else
+            add_headerfiles("backends/imgui_impl_opengl3_loader.h")
+        end
+    end
+
+    if has_config("user_config") then
+        local user_config = get_config("user_config")
+        add_defines("IMGUI_USER_CONFIG=\"".. user_config .."\"")
+    end
+
+    -- Modify imconfig.
+    after_install(function (target)
+        local config_file = path.join(target:installdir(), "include/imconfig.h")
+        if has_config("wchar32") then
+            io.gsub(config_file, "//#define IMGUI_USE_WCHAR32", "#define IMGUI_USE_WCHAR32")
+        end
+        if has_config("freetype") then
+            io.gsub(config_file, "//#define IMGUI_ENABLE_FREETYPE", "#define IMGUI_ENABLE_FREETYPE")
+        end
+    end)

packages/i/imgui/xmake.lua

@@ -23,6 +23,8 @@ package("imgui")
 
     add_configs("user_config", {description = "Use user config (disables test!)", default = nil, type = "string"})
     add_configs("glfw_opengl3", {description = "Use glfw+opengl3 as backend", default = false, type = "boolean"})
+    add_configs("wchar32", {description = "Use 32-bit for ImWchar (default is 16-bit)", default = false, type = "boolean"})
+    add_configs("freetype", {description = "Use FreeType to build and rasterize the font atlas", default = false, type = "boolean"})
 
     add_includedirs("include", "include/imgui", "include/backends")
 
@@ -31,6 +33,9 @@ package("imgui")
     end
 
     on_load("macosx", "linux", "windows", "mingw", "android", "iphoneos", function (package)
+        if package:config("freetype") then
+            package:add("deps", "freetype")
+        end
         if package:config("glfw_opengl3") then
             if package:version():lt("1.84") then
                 package:add("deps", "glad")
@@ -44,50 +49,16 @@ package("imgui")
     end)
 
     on_install("macosx", "linux", "windows", "mingw", "android", "iphoneos", function (package)
-        local xmake_lua
-        if package:config("glfw_opengl3") then
-            local pkgs = "\"glfw\""
-            if package:version():lt("1.84") then
-                pkgs = pkgs .. ", \"glad\""
-            end
-            xmake_lua = format([[
-                add_rules("mode.debug", "mode.release")
-                add_rules("utils.install.cmake_importfiles")
-                add_requires(%s)
-                target("imgui")
-                    set_kind("static")
-                    add_files("*.cpp", "backends/imgui_impl_glfw.cpp", "backends/imgui_impl_opengl3.cpp")
-                    add_packages(%s)
-                    add_includedirs(".")
-                    add_headerfiles("*.h")
-                    add_headerfiles("(backends/imgui_impl_glfw.h)", "(backends/imgui_impl_opengl3.h)")
-            ]], pkgs, pkgs)
-            if package:version():ge("1.84") then
-                xmake_lua = xmake_lua .. "add_headerfiles(\"(backends/imgui_impl_opengl3_loader.h)\")\n"
-            else
-                xmake_lua = xmake_lua .. "add_defines(\"IMGUI_IMPL_OPENGL_LOADER_GLAD\")\n"
-            end
-        else
-            xmake_lua = [[
-                add_rules("mode.debug", "mode.release")
-                add_rules("utils.install.cmake_importfiles")
-                target("imgui")
-                    set_kind("static")
-                    add_files("*.cpp")
-                    add_headerfiles("*.h")
-            ]]
-        end
+        local configs = {
+            wchar32      = package:config("wchar32"),
+            freetype     = package:config("freetype"),
+            glfw_opengl3 = package:config("glfw_opengl3"),
+            user_config  = package:config("user_config"),
+            use_glad     = package:version():lt("1.84") -- this flag will be used if glfw_opengl3 is enabled
+        }
 
-        local user_config = package:config("user_config")
-        if user_config ~= nil then
-            if is_host("windows") then
-                user_config = user_config:gsub("\\", "\\\\")
-            end
-            xmake_lua = xmake_lua .. "add_defines(\"IMGUI_USER_CONFIG=\\\"" .. user_config .. "\\\"\")"
-        end
-
-        io.writefile("xmake.lua", xmake_lua)
-        import("package.tools.xmake").install(package)
+        os.cp(path.join(package:scriptdir(), "port", "xmake.lua"), "xmake.lua")
+        import("package.tools.xmake").install(package, configs)
     end)
 
     on_test(function (package)
@@ -105,3 +76,4 @@ package("imgui")
             }
         ]]}, {configs = {languages = "c++11"}, includes = {"imgui.h"}}))
     end)
+