Method set

src/image/p5.Image.js:576–649

* Sets the color of one or more pixels within an image. * * `img.set()` is easy to use but it's not as fast as * img.pixels . Use * img.pixels to set many pixel values. * * `img.set()` interprets the first two parameter

(x, y, imgOrCol)

   * }
   */
  set(x, y, imgOrCol) {
    // Renderer2D.prototype.set.call(this, x, y, imgOrCol);
    // round down to get integer numbers
    x = Math.floor(x);
    y = Math.floor(y);
    const pixelsState = this._pixelsState;
    if (imgOrCol instanceof Image) {
      this.drawingContext.save();
      this.drawingContext.setTransform(1, 0, 0, 1, 0, 0);
      this.drawingContext.scale(
        this._pixelDensity,
        this._pixelDensity
      );
      this.drawingContext.clearRect(x, y, imgOrCol.width, imgOrCol.height);
      this.drawingContext.drawImage(imgOrCol.canvas, x, y);
      this.drawingContext.restore();
    } else {
      let r = 0,
        g = 0,
        b = 0,
        a = 0;
      let idx =
        4 *
        (y *
          this._pixelDensity *
          (this.width * this._pixelDensity) +
          x * this._pixelDensity);
      if (!pixelsState.imageData) {
        pixelsState.loadPixels();
      }
      if (typeof imgOrCol === 'number') {
        if (idx < pixelsState.pixels.length) {
          r = imgOrCol;
          g = imgOrCol;
          b = imgOrCol;
          a = 255;
          //this.updatePixels.call(this);
        }
      } else if (Array.isArray(imgOrCol)) {
        if (imgOrCol.length < 4) {
          throw new Error('pixel array must be of the form [R, G, B, A]');
        }
        if (idx < pixelsState.pixels.length) {
          r = imgOrCol[0];
          g = imgOrCol[1];
          b = imgOrCol[2];
          a = imgOrCol[3];
          //this.updatePixels.call(this);
        }
      } else if (imgOrCol instanceof p5.Color) {
        if (idx < pixelsState.pixels.length) {
          [r, g, b, a] = imgOrCol._getRGBA([255, 255, 255, 255]);
          //this.updatePixels.call(this);
        }
      }
      // loop over pixelDensity * pixelDensity
      for (let i = 0; i < this._pixelDensity; i++) {
        for (let j = 0; j < this._pixelDensity; j++) {