//=============================================================================
// ClearSmallText.js
//=============================================================================
/*:
 * @target MZ
 * @plugindesc Cleans the display of characters 21px or less
 * @author Tamaki Awana
 *
 * @help Fixed a bug display of characters 21px or less blurred.
 *
 * This bug was fixed on RMMV community version core script 1.3,
 * but same bug occurred in RMMZ.
 * So, I ported the corresponding countermeasure code.
 * Thanks to RMMV community version core script committers.
 *
 * Plugin Commands:
 * This plugin does not provide plugin commands.
 *
 * Update History:
 * ver.1.0.1 English supported
 * ver.1.0 Release
 *
 * ---
 * This plugin is released under MIT license.
 * https://opensource.org/licenses/mit-license.php
 */
/*:ja
 * @target MV
 * @plugindesc 21px以下の文字の表示をきれいにします
 * @author 沫那環
 *
 * @help 21px以下の文字の表示が、にじんでしまう不具合を解消します。
 *
 * コミュニティ版RPGツクールMVコアスクリプトの1.3にて
 * 解消されていた不具合なのですが、MZで同様の不具合が
 * 発生していたので、該当する対策コードを移植しました。
 * この場を借りて、コミュニティ版コアスクリプトの記述に携わった方々に、
 * お礼申し上げます。
 *
 * 【プラグインコマンドについて】
 * このプラグインには、プラグインコマンドはありません。
 *
 * 【更新履歴】
 * 　ver.1.0.1 英語表示に対応
 * 　ver.1.0　公開
 *
 * ---
 * このプラグインは MIT License にもとづいて提供されています。
 * https://opensource.org/licenses/mit-license.php
 */

(() => {
  /**
   * Draws the outline text to the bitmap.
   *
   * @param {string} text - The text that will be drawn.
   * @param {number} x - The x coordinate for the left of the text.
   * @param {number} y - The y coordinate for the top of the text.
   * @param {number} maxWidth - The maximum allowed width of the text.
   * @param {number} lineHeight - The height of the text line.
   * @param {string} align - The alignment of the text.
   */
  Bitmap.prototype.drawText = function (
    text,
    x,
    y,
    maxWidth,
    lineHeight,
    align
  ) {
    // [Note] Different browser makes different rendering with
    //   textBaseline == 'top'. So we use 'alphabetic' here.
    if (text !== undefined) {
      if (this.fontSize < Bitmap.minFontSize) {
        this.drawSmallText(text, x, y, maxWidth, lineHeight, align);
        return;
      }
      const context = this.context;
      const alpha = context.globalAlpha;
      maxWidth = maxWidth || 0xffffffff;
      let tx = x;
      let ty = Math.round(y + lineHeight / 2 + this.fontSize * 0.35);
      if (align === "center") {
        tx += maxWidth / 2;
      }
      if (align === "right") {
        tx += maxWidth;
      }
      context.save();
      context.font = this._makeFontNameText();
      context.textAlign = align;
      context.textBaseline = "alphabetic";
      context.globalAlpha = 1;
      this._drawTextOutline(text, tx, ty, maxWidth);
      context.globalAlpha = alpha;
      this._drawTextBody(text, tx, ty, maxWidth);
      context.restore();
      this._baseTexture.update();
    }
  };

  /**
   * Draws the small text big once and resize it because modern broswers are poor at drawing small text.
   *
   * @method drawSmallText
   * @param {String} text The text that will be drawn
   * @param {Number} x The x coordinate for the left of the text
   * @param {Number} y The y coordinate for the top of the text
   * @param {Number} maxWidth The maximum allowed width of the text
   * @param {Number} lineHeight The height of the text line
   * @param {String} align The alignment of the text
   */
  Bitmap.prototype.drawSmallText = function (
    text,
    x,
    y,
    maxWidth,
    lineHeight,
    align
  ) {
    const minFontSize = Bitmap.minFontSize;
    let bitmap = Bitmap.drawSmallTextBitmap;
    bitmap.fontFace = this.fontFace;
    bitmap.fontSize = minFontSize;
    bitmap.fontItalic = this.fontItalic;
    bitmap.textColor = this.textColor;
    bitmap.outlineColor = this.outlineColor;
    bitmap.outlineWidth = (this.outlineWidth * minFontSize) / this.fontSize;
    maxWidth = maxWidth || 816;
    let height = this.fontSize * 1.5;
    let scaledMaxWidth = (maxWidth * minFontSize) / this.fontSize;
    let scaledMaxWidthWithOutline = scaledMaxWidth + bitmap.outlineWidth * 2;
    let scaledHeight = (height * minFontSize) / this.fontSize;
    let scaledHeightWithOutline = scaledHeight + bitmap.outlineWidth * 2;

    let bitmapWidth = bitmap.width;
    let bitmapHeight = bitmap.height;
    while (scaledMaxWidthWithOutline > bitmapWidth) bitmapWidth *= 2;
    while (scaledHeightWithOutline > bitmapHeight) bitmapHeight *= 2;
    if (bitmap.width !== bitmapWidth || bitmap.height !== bitmapHeight)
      bitmap.resize(bitmapWidth, bitmapHeight);

    bitmap.drawText(
      text,
      bitmap.outlineWidth,
      bitmap.outlineWidth,
      scaledMaxWidth,
      minFontSize,
      align
    );
    this.blt(
      bitmap,
      0,
      0,
      scaledMaxWidthWithOutline,
      scaledHeightWithOutline,
      x - this.outlineWidth,
      y - this.outlineWidth + (lineHeight - this.fontSize) / 2,
      maxWidth + this.outlineWidth * 2,
      height + this.outlineWidth * 2
    );
    bitmap.clear();
  };

  Bitmap.minFontSize = 21;
  Bitmap.drawSmallTextBitmap = new Bitmap(1632, Bitmap.minFontSize);
})();