"use strict";
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var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports["default"] = composite;
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var _utils = require("@jimp/utils");
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var constants = _interopRequireWildcard(require("../constants"));
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var compositeModes = _interopRequireWildcard(require("./composite-modes"));
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/**
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* Composites a source image over to this image respecting alpha channels
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* @param {Jimp} src the source Jimp instance
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* @param {number} x the x position to blit the image
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* @param {number} y the y position to blit the image
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* @param {object} options determine what mode to use
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* @param {function(Error, Jimp)} cb (optional) a callback for when complete
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* @returns {Jimp} this for chaining of methods
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*/
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function composite(src, x, y) {
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var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
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var cb = arguments.length > 4 ? arguments[4] : undefined;
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if (typeof options === 'function') {
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cb = options;
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options = {};
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}
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if (!(src instanceof this.constructor)) {
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return _utils.throwError.call(this, 'The source must be a Jimp image', cb);
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}
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if (typeof x !== 'number' || typeof y !== 'number') {
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return _utils.throwError.call(this, 'x and y must be numbers', cb);
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}
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var _options = options,
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mode = _options.mode,
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opacitySource = _options.opacitySource,
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opacityDest = _options.opacityDest;
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if (!mode) {
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mode = constants.BLEND_SOURCE_OVER;
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}
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if (typeof opacitySource !== 'number' || opacitySource < 0 || opacitySource > 1) {
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opacitySource = 1.0;
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}
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if (typeof opacityDest !== 'number' || opacityDest < 0 || opacityDest > 1) {
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opacityDest = 1.0;
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}
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var blendmode = compositeModes[mode]; // round input
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x = Math.round(x);
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y = Math.round(y);
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var baseImage = this;
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if (opacityDest !== 1.0) {
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baseImage.opacity(opacityDest);
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}
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src.scanQuiet(0, 0, src.bitmap.width, src.bitmap.height, function (sx, sy, idx) {
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var dstIdx = baseImage.getPixelIndex(x + sx, y + sy, constants.EDGE_CROP);
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var blended = blendmode({
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r: this.bitmap.data[idx + 0] / 255,
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g: this.bitmap.data[idx + 1] / 255,
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b: this.bitmap.data[idx + 2] / 255,
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a: this.bitmap.data[idx + 3] / 255
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}, {
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r: baseImage.bitmap.data[dstIdx + 0] / 255,
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g: baseImage.bitmap.data[dstIdx + 1] / 255,
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b: baseImage.bitmap.data[dstIdx + 2] / 255,
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a: baseImage.bitmap.data[dstIdx + 3] / 255
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}, opacitySource);
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baseImage.bitmap.data[dstIdx + 0] = this.constructor.limit255(blended.r * 255);
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baseImage.bitmap.data[dstIdx + 1] = this.constructor.limit255(blended.g * 255);
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baseImage.bitmap.data[dstIdx + 2] = this.constructor.limit255(blended.b * 255);
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baseImage.bitmap.data[dstIdx + 3] = this.constructor.limit255(blended.a * 255);
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});
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if ((0, _utils.isNodePattern)(cb)) {
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cb.call(this, null, this);
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}
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return this;
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}
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//# sourceMappingURL=index.js.map
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