//=============================================================================
// PictureSpriteSheet.js
// ----------------------------------------------------------------------------
// Copyright (c) 2015-2017 Triacontane
// This software is released under the MIT License.
// http://opensource.org/licenses/mit-license.php
// ----------------------------------------------------------------------------
// Version
// 1.0.1 2017/02/07 端末依存の記述を削除
// 1.0.0 2016/12/31 初版
// ----------------------------------------------------------------------------
// [Blog]   : http://triacontane.blogspot.jp/
// [Twitter]: https://twitter.com/triacontane/
// [GitHub] : https://github.com/triacontane/
//=============================================================================

/*:
@url https://triacontane.blogspot.com/
@plugindesc Picture sprite sheet plugin
@author Triacontane
@license MIT License

@help
English Help Translator: munokura
This is an unofficial English translation of the plugin help,
created to support global RPG Maker users.
Feedback is welcome to improve translation quality
(see: https://github.com/munokura/triacontane-MV-plugins ).
Original plugin by Triacontane.
Please check the latest official version at:
https://triacontane.blogspot.com
-----
This plugin converts the picture to a sprite sheet with a width of N by height
of N, similar to battle animations.
It improves performance when switching between cel images and animating them,
eliminating flickering due to asynchronous synchronization.

This plugin is similar to the Picture Animation plugin, but emphasizes
performance. Linked images that are too large (over 5000 pixels) may not
display correctly.

Plugin Command Details
Execute from the "Plugin Command" event command.
(Separate parameters with a space.)

PSS_SET_CELL_SIZE 4 3
 # Sets the cell of the next picture to be displayed to [4] by [3].

*1 Be sure to execute this immediately before "Show Picture."
Also, specifying the picture number is not necessary.

PSS_SET_CELL 1 4
 # Sets the cell number of the picture with picture number [1] to [4].(*2)

*2 Specify cell numbers starting from [0] according to the following legend.
[0] [1] [2]
[3] [4] [5]
[6] [7] [8]

PSS_ADD_CELL 1
 # Adds 1 to the cell number of the picture with picture number [1].

Terms of Use:
You may modify and redistribute this plugin without permission from the
author, and there are no restrictions on its use (commercial, 18+, etc.).
This plugin is now yours.
*/

/*:ja
@plugindesc ピクチャのスプライトシート化プラグイン
@author トリアコンタン

@help ピクチャを戦闘アニメーション画像のように横N * 縦Nのスプライトシートにします。
セル画像を切り替えてアニメーションを行う場合に、パフォーマンスを改善して
かつ非同期によるチラつきが発生しなくなります。

ピクチャのアニメーションプラグインと類似していますが、
こちらはパフォーマンスを重視しています。連結した画像があまりに
大きい(5000ピクセル以上)場合は正常に表示されない可能性があります。

プラグインコマンド詳細
 イベントコマンド「プラグインコマンド」から実行。
 （パラメータの間は半角スペースで区切る）

PSS_セルサイズ設定 4 3 # 次の表示するピクチャのセルを横[4] 縦[3]にします。
PSS_SET_CELL_SIZE 4 3  # 同上(※1)

※1 必ず「ピクチャの表示」直前に実行してください。
また、ピクチャ番号の指定は不要です。

PSS_セル指定 1 4 # ピクチャ番号[1]のピクチャのセル番号を[4]にします。
PSS_SET_CELL 1 4 # 同上(※2)

※2 セル番号は[0]から開始で以下の凡例に従って指定してください。
[0] [1] [2]
[3] [4] [5]
[6] [7] [8]

PSS_セル加算 1 # ピクチャ番号[1]のピクチャのセル番号を1加算します。
PSS_ADD_CELL 1 # 同上

利用規約：
 作者に無断で改変、再配布が可能で、利用形態（商用、18禁利用等）
 についても制限はありません。
 このプラグインはもうあなたのものです。
*/

(function () {
    'use strict';

    //=============================================================================
    // ローカル関数
    //  プラグインパラメータやプラグインコマンドパラメータの整形やチェックをします
    //=============================================================================
    var getArgNumber = function (arg, min, max) {
        if (arguments.length < 2) min = -Infinity;
        if (arguments.length < 3) max = Infinity;
        return (parseInt(arg) || 0).clamp(min, max);
    };

    var convertEscapeCharacters = function (text) {
        if (text == null) text = '';
        var windowLayer = SceneManager._scene._windowLayer;
        return windowLayer ? windowLayer.children[0].convertEscapeCharacters(text) : text;
    };

    var convertAllArguments = function (args) {
        for (var i = 0; i < args.length; i++) {
            args[i] = convertEscapeCharacters(args[i]);
        }
        return args;
    };

    //=============================================================================
    // パラメータの取得と整形
    //=============================================================================
    var pluginCommandMap = new Map([
        ['PSS_セルサイズ設定', 'setCellSizeForPss'],
        ['PSS_SET_CELL_SIZE', 'setCellSizeForPss'],
        ['PSS_セル指定', 'setCellForPss'],
        ['PSS_SET_CELL', 'setCellForPss'],
        ['PSS_セル加算', 'addCellForPss'],
        ['PSS_ADD_CELL', 'addCellForPss']
    ]);

    //=============================================================================
    // Game_Interpreter
    //  プラグインコマンドを追加定義します。
    //=============================================================================
    var _Game_Interpreter_pluginCommand = Game_Interpreter.prototype.pluginCommand;
    Game_Interpreter.prototype.pluginCommand = function (command, args) {
        _Game_Interpreter_pluginCommand.apply(this, arguments);
        var pluginCommand = pluginCommandMap.get(command.toUpperCase());
        if (pluginCommand) {
            this[pluginCommand](convertAllArguments(args));
        }
    };

    Game_Interpreter.prototype.setCellSizeForPss = function (args) {
        $gameScreen.setPictureSpriteSheetSize(getArgNumber(args[0], 1), getArgNumber(args[1], 1));
    };

    Game_Interpreter.prototype.setCellForPss = function (args) {
        var picture = $gameScreen.picture(getArgNumber(args[0], 1));
        if (picture) {
            picture.setSheetCellIndex(getArgNumber(args[1], 0));
        }
    };

    Game_Interpreter.prototype.addCellForPss = function (args) {
        var picture = $gameScreen.picture(getArgNumber(args[0], 1));
        if (picture) {
            picture.addSheetCellIndex();
        }
    };

    //=============================================================================
    // Game_Screen
    //  セル数を保持します。
    //=============================================================================
    Game_Screen.prototype.setPictureSpriteSheetSize = function (col, row) {
        this._pictureSpriteSheetSize = [col, row];
    };

    Game_Screen.prototype.getPictureSpriteSheetSize = function () {
        var result = this._pictureSpriteSheetSize;
        if (result) {
            this._pictureSpriteSheetSize = undefined;
        }
        return result;
    };

    //=============================================================================
    // Game_Picture
    //  セルサイズを取得して、スプライトシート化します。
    //=============================================================================
    var _Game_Picture_show = Game_Picture.prototype.show;
    Game_Picture.prototype.show = function (name, origin, x, y, scaleX,
        scaleY, opacity, blendMode) {
        _Game_Picture_show.apply(this, arguments);
        var spriteSheetSize = $gameScreen.getPictureSpriteSheetSize();
        if (spriteSheetSize) {
            this._sheetCol = spriteSheetSize[0];
            this._sheetRow = spriteSheetSize[1];
        } else {
            this._sheetCol = null;
            this._sheetRow = null;
        }
    };

    Game_Picture.prototype.isUsingSpriteSheet = function () {
        return this._sheetCol && this._sheetRow;
    };

    Game_Picture.prototype.getSheetCol = function () {
        return this._sheetCol;
    };

    Game_Picture.prototype.getSheetRow = function () {
        return this._sheetRow;
    };

    Game_Picture.prototype.getSheetMaxIndex = function () {
        return this._sheetCol * this._sheetRow;
    };

    Game_Picture.prototype.setSheetCellIndex = function (value) {
        this._sheetCellIndex = value % this.getSheetMaxIndex();
    };

    Game_Picture.prototype.getSheetCellIndex = function () {
        return this._sheetCellIndex || 0;
    };

    Game_Picture.prototype.addSheetCellIndex = function () {
        this.setSheetCellIndex(this.getSheetCellIndex() + 1);
    };

    Game_Picture.prototype.getSheetCellPosition = function () {
        var index = this.getSheetCellIndex();
        var colIndex = index % this._sheetCol;
        var rowIndex = Math.floor(index / this._sheetCol);
        return [colIndex, rowIndex];
    };

    //=============================================================================
    // Sprite_Picture
    //  スプライトシート化を実装します。
    //=============================================================================
    var _Sprite_Picture_update = Sprite_Picture.prototype.update;
    Sprite_Picture.prototype.update = function () {
        _Sprite_Picture_update.apply(this, arguments);
        if (this.visible && this.picture().isUsingSpriteSheet()) {
            this.updateFrameForPss();
        }
    };

    Sprite_Picture.prototype.updateFrameForPss = function () {
        var position = this.picture().getSheetCellPosition();
        var width = this.getCellWidth();
        var height = this.getCellHeight();
        this.setFrame(position[0] * width, position[1] * height, width, height);
    };

    Sprite_Picture.prototype.getCellWidth = function () {
        return this.bitmap.width / this.picture().getSheetCol();
    };

    Sprite_Picture.prototype.getCellHeight = function () {
        return this.bitmap.height / this.picture().getSheetRow();
    };
})();