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Add porting section to README

This commit is contained in:
Varun Patil 2020-10-19 02:20:00 +05:30
parent 63a6cf3dfc
commit 100b3246ad
3 changed files with 632 additions and 3 deletions
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142
README.md
View File

@ -126,3 +126,145 @@ To alleviate possible porting of heavily Win32API reliant scripts, I have added
* The `Input.press?` family of functions accepts three additional button constants: `::MOUSELEFT`, `::MOUSEMIDDLE` and `::MOUSERIGHT` for the respective mouse buttons.
* The `Input` module has two additional functions, `#mouse_x` and `#mouse_y` to query the mouse pointer position relative to the game screen.
* The `Graphics` module has two additional properties: `fullscreen` represents the current fullscreen mode (`true` = fullscreen, `false` = windowed), `show_cursor` hides the system cursor inside the game window when `false`.
## Porting games to work with mruby+wasm
You can view a full example of a Scripts.rxdata diff for the Knight Blade sample game [here](extra/Scripts.rb.diff) (generated using [this](https://gist.github.com/pulsejet/6cb547db7222a65b32f34499c7266c36))
mruby has mutliple differences with MRI, and so games may not work as expected when porting to the web. The `extra/vm.c.patch` takes care of differing behavior during integer division, but you will need to make at least the following changes in your `Scripts.rxdata` for the game to work correctly and with acceptable performance. The following assumes a "standard" `Scripts.rxdata` to begin with; you will have to adapt similarly for your game.
### Event Loop
> **NOTE**: You may skip this step at the cost of performance and an uncontrolled framerate.
The event loop must be moved to the browser control. Add the following function globally in the last `Main` section. This function will be called by the browser for each animation frame.
```ruby
$prev_scene = nil
def main_update_loop
if $scene != nil
if $scene != $prev_scene
if $prev_scene != nil
$prev_scene.dispose
end
$scene.main
$prev_scene = $scene
end
# Update game screen
Graphics.update
# Update input information
Input.update
# Frame update
$scene.update
else
raise "END"
end
end
```
and **remove** the infinte loop so that control exits to the browser
```ruby
while $scene != nil
$scene.main
end
```
For each "Scene", end the `main` initializer after the `Graphics.transition` call and add a dispose method to clean up. Remove the infinite loop. In effect, this amounts to replacing
```ruby
loop do
Graphics.update
Input.update
update
if $scene != self
break
end
end
```
with
```ruby
end
def dispose
```
Your final "Scene" script in RXMP might look like
```ruby
class Scene_Menu
...
def main
...
Graphics.transition
end
def dispose
Graphics.freeze
...
end
def update
...
end
end
```
### Save Games
Save games are stored in IndexedDB using [localForage](https://github.com/localForage/localForage); you may expand on this to use a custom or cloud storage.
The title screen must not check if save files exist, as they may be loaded asynchronously. Just remove the check of file existence and always keep the Continue button enabled in `Scene_Title`.
Save files must be persisted to IndexedDB. To do this, call `save_file_async(filename)` after changing a save file. Also dump an extra `1` to the save file to work around some buggy Marshal behavior.
In standard RMXP scripts,
```ruby
class Scene_Save < Scene_File
...
def on_decision(filename)
...
file = File.open(filename, "wb")
write_save_data(file)
file.close
save_file_async(filename)
...
end
def write_save_data(file)
...
Marshal.dump(characters, file)
...
Marshal.dump($game_player, file)
...
Marshal.dump(1, file)
end
end
```
### begin ... end until
This construct does not exist in mruby. The standard RXMP scripts use it in `Scene_Battle_3`. Remove all usages of this construct by replacing
```ruby
begin
...
end until condition
```
with
```ruby
loop do
...
break if condition
end
```
### Audio and Graphics formats
Only OGG audio and PNG/JPEG images are supported. You can use `extra/convert_audio.sh` as a reference to quickly convert MIDI and WAV files to OGG (other formats such as MP3 can be handled similarly).
### Other Notes
* Refer to the `GAME_PROCESSING` section in `build.sh`. A folder named `gameasync` must contain all game files, which must be post processed.
* A file mapping must be generated for the filesystem to work properly, generated with `extra/make_mapping.sh`
* The same section also generates preload files for RMXP games. These files are used to preload assets when a map is loaded, and are generated by extracting all strings that refer to existing files from every map. Preload files are optional.
* Change the `namespace` variable in `index.html` if you are running multiple games on the same site. This variable is used to identify the game for save files in IndexedDB.
* Add a `.nojekyll` file to root directory if you are deploying to GitHub pages.

2
build.sh
View File

@ -119,7 +119,7 @@ mkdir -p build
cp -R mkxp.html mkxp.wasm mkxp.js extra/js build/
# ==========================
# Get and process gamme
# GAME_PROCESSING
# ==========================
cd build

487
extra/Scripts.rb.diff Normal file
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@ -0,0 +1,487 @@
diff -bur raw/KN_Custom.rb pro/KN_Custom.rb
--- raw/KN_Custom.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/KN_Custom.rb 2020-10-19 01:32:20.911967702 +0530
@@ -552,18 +552,11 @@
# コンティニュー有効判定
# セーブファイルがひとつでも存在するかどうかを調べる
# 有効なら @continue_enabled を true、無効なら false にする
- @continue_enabled = false
+ @continue_enabled = true
for i in 0..3
if FileTest.exist?("Save#{i+1}.rxdata")
- @continue_enabled = true
- end
- end
- # コンティニューが有効な場合、カーソルをコンティニューに合わせる
- # 無効な場合、コンティニューの文字をグレー表示にする
- if @continue_enabled
@command_window.index = 1
- else
- @command_window.disable_item(1)
+ end
end
# タイトル BGM を演奏
$game_system.bgm_play($data_system.title_bgm)
@@ -572,26 +565,6 @@
Audio.bgs_stop
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
- end
- # トランジション準備
- Graphics.freeze
- # コマンドウィンドウを解放
- @command_window.dispose
- # タイトルグラフィックを解放
- @sprite.bitmap.dispose
- @sprite.dispose
end
end
diff -bur raw/Main.rb pro/Main.rb
--- raw/Main.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Main.rb 2020-10-19 01:32:20.911967702 +0530
@@ -4,15 +4,37 @@
# 　各クラスの定義が終わった後、ここから実際の処理が始まります。
#==============================================================================
+$prev_scene = nil
+
+def main_update_loop
+ if $scene != nil
+ if $scene != $prev_scene
+ if $prev_scene != nil
+ $prev_scene.dispose
+ end
+ $scene.main
+ $prev_scene = $scene
+ end
+ # Update game screen
+ Graphics.update
+ # Update input information
+ Input.update
+ # Frame update
+ $scene.update
+ else
+ raise "END"
+ end
+end
+
begin
# トランジション準備
Graphics.freeze
# シーンオブジェクト (タイトル画面) を作成
$scene = Scene_Title.new
# $scene が有効な限り main メソッドを呼び出す
- while $scene != nil
- $scene.main
- end
+ #while $scene != nil
+ #$scene.main
+ #end
# フェードアウト
Graphics.transition(20)
rescue Errno::ENOENT
diff -bur raw/Scene_Battle_1.rb pro/Scene_Battle_1.rb
--- raw/Scene_Battle_1.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Battle_1.rb 2020-10-19 01:32:20.907967700 +0530
@@ -52,19 +52,9 @@
end
# プレバトルフェーズ開始
start_phase1
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# マップをリフレッシュ
$game_map.refresh
# トランジション準備
diff -bur raw/Scene_Battle_3.rb pro/Scene_Battle_3.rb
--- raw/Scene_Battle_3.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Battle_3.rb 2020-10-19 01:32:20.907967700 +0530
@@ -22,7 +22,7 @@
#--------------------------------------------------------------------------
def phase3_next_actor
# ループ
- begin
+ loop do
# アクターの明滅エフェクト OFF
if @active_battler != nil
@active_battler.blink = false
@@ -38,7 +38,8 @@
@active_battler = $game_party.actors[@actor_index]
@active_battler.blink = true
# アクターがコマンド入力を受け付けない状態ならもう一度
- end until @active_battler.inputable?
+ break if @active_battler.inputable?
+ end
# アクターコマンドウィンドウをセットアップ
phase3_setup_command_window
end
diff -bur raw/Scene_Debug.rb pro/Scene_Debug.rb
--- raw/Scene_Debug.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Debug.rb 2020-10-19 01:32:20.907967700 +0530
@@ -21,19 +21,9 @@
@right_window.top_id = @left_window.top_id
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# マップをリフレッシュ
$game_map.refresh
# トランジション準備
diff -bur raw/Scene_End.rb pro/Scene_End.rb
--- raw/Scene_End.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_End.rb 2020-10-19 01:32:20.907967700 +0530
@@ -18,19 +18,9 @@
@command_window.y = 240 - @command_window.height / 2
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Equip.rb pro/Scene_Equip.rb
--- raw/Scene_Equip.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Equip.rb 2020-10-19 01:32:20.907967700 +0530
@@ -41,19 +41,9 @@
refresh
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_File.rb pro/Scene_File.rb
--- raw/Scene_File.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_File.rb 2020-10-19 01:32:20.907967700 +0530
@@ -29,19 +29,9 @@
@savefile_windows[@file_index].selected = true
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Gameover.rb pro/Scene_Gameover.rb
--- raw/Scene_Gameover.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Gameover.rb 2020-10-19 01:32:20.907967700 +0530
@@ -19,19 +19,9 @@
$game_system.me_play($data_system.gameover_me)
# トランジション実行
Graphics.transition(120)
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ゲームオーバーグラフィックを解放
diff -bur raw/Scene_Item.rb pro/Scene_Item.rb
--- raw/Scene_Item.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Item.rb 2020-10-19 01:32:20.907967700 +0530
@@ -20,19 +20,9 @@
@target_window.active = false
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Map.rb pro/Scene_Map.rb
--- raw/Scene_Map.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Map.rb 2020-10-19 01:32:20.907967700 +0530
@@ -15,19 +15,9 @@
@message_window = Window_Message.new
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# スプライトセットを解放
diff -bur raw/Scene_Menu.rb pro/Scene_Menu.rb
--- raw/Scene_Menu.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Menu.rb 2020-10-19 01:32:20.907967700 +0530
@@ -56,19 +56,9 @@
@status_window.y = 0
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Name.rb pro/Scene_Name.rb
--- raw/Scene_Name.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Name.rb 2020-10-19 01:32:20.907967700 +0530
@@ -16,19 +16,9 @@
@input_window = Window_NameInput.new
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Save.rb pro/Scene_Save.rb
--- raw/Scene_Save.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Save.rb 2020-10-19 01:32:20.907967700 +0530
@@ -21,6 +21,9 @@
file = File.open(filename, "wb")
write_save_data(file)
file.close
+
+ save_file_async(filename)
+
# イベントから呼び出されている場合
if $game_temp.save_calling
# セーブ呼び出しフラグをクリア
@@ -80,5 +83,6 @@
Marshal.dump($game_troop, file)
Marshal.dump($game_map, file)
Marshal.dump($game_player, file)
+ Marshal.dump(1, file)
end
end
diff -bur raw/Scene_Shop.rb pro/Scene_Shop.rb
--- raw/Scene_Shop.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Shop.rb 2020-10-19 01:32:20.907967700 +0530
@@ -38,19 +38,9 @@
@status_window.visible = false
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Skill.rb pro/Scene_Skill.rb
--- raw/Scene_Skill.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Skill.rb 2020-10-19 01:32:20.907967700 +0530
@@ -30,19 +30,9 @@
@target_window.active = false
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Status.rb pro/Scene_Status.rb
--- raw/Scene_Status.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Status.rb 2020-10-19 01:32:20.907967700 +0530
@@ -22,19 +22,9 @@
@status_window = Window_Status.new(@actor)
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# ウィンドウを解放
diff -bur raw/Scene_Title.rb pro/Scene_Title.rb
--- raw/Scene_Title.rb 2020-10-19 01:32:18.595966594 +0530
+++ pro/Scene_Title.rb 2020-10-19 01:32:20.907967700 +0530
@@ -64,19 +64,9 @@
Audio.bgs_stop
# トランジション実行
Graphics.transition
- # メインループ
- loop do
- # ゲーム画面を更新
- Graphics.update
- # 入力情報を更新
- Input.update
- # フレーム更新
- update
- # 画面が切り替わったらループを中断
- if $scene != self
- break
- end
end
+
+ def dispose
# トランジション準備
Graphics.freeze
# コマンドウィンドウを解放