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| /*
* Photo Editor SDK - photoeditorsdk.com
* Copyright (c) 2013-2015 9elements GmbH
*
* Released under Attribution-NonCommercial 3.0 Unported
* http://creativecommons.org/licenses/by-nc/3.0/
*
* For commercial use, please contact us at contact@9elements.com
*/
'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
// istanbul ignore next
var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { Eif (protoProps) defineProperties(Constructor.prototype, protoProps); Iif (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
// istanbul ignore next
var _set = function set(object, property, value, receiver) { var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent !== null) { set(parent, property, value, receiver); } } else if ('value' in desc && desc.writable) { desc.value = value; } else { var setter = desc.set; if (setter !== undefined) { setter.call(receiver, value); } } return value; };
// istanbul ignore next
var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
// istanbul ignore next
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
// istanbul ignore next
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
// istanbul ignore next
function _inherits(subClass, superClass) { Iif (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); Eif (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var _operation = require('./operation');
var _operation2 = _interopRequireDefault(_operation);
var _libMathVector2 = require('../lib/math/vector2');
var _libMathVector22 = _interopRequireDefault(_libMathVector2);
var _vendorStackBlur = require('../vendor/stack-blur');
var _vendorStackBlur2 = _interopRequireDefault(_vendorStackBlur);
/**
* An operation that can crop out a part of the image
*
* @class
* @alias ImglyKit.Operations.TiltShiftOperation
* @extends ImglyKit.Operation
*/
var TiltShiftOperation = (function (_Operation) {
_inherits(TiltShiftOperation, _Operation);
function TiltShiftOperation() {
_classCallCheck(this, TiltShiftOperation);
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
_get(Object.getPrototypeOf(TiltShiftOperation.prototype), 'constructor', this).apply(this, args);
/**
* The fragment shader used for this operation
* @internal Based on evanw's glfx.js tilt shift shader:
* https://github.com/evanw/glfx.js/blob/master/src/filters/blur/tiltshift.js
*/
this._fragmentShader = '\n precision mediump float;\n uniform sampler2D u_image;\n uniform float blurRadius;\n uniform float gradientRadius;\n uniform vec2 start;\n uniform vec2 end;\n uniform vec2 delta;\n uniform vec2 texSize;\n varying vec2 v_texCoord;\n\n float random(vec3 scale, float seed) {\n return fract(sin(dot(gl_FragCoord.xyz + seed, scale)) * 43758.5453 + seed);\n }\n\n void main() {\n vec4 color = vec4(0.0);\n float total = 0.0;\n\n float offset = random(vec3(12.9898, 78.233, 151.7182), 0.0);\n\n vec2 normal = normalize(vec2(start.y - end.y, end.x - start.x));\n float radius = smoothstep(0.0, 1.0, abs(dot(v_texCoord * texSize - start, normal)) / gradientRadius) * blurRadius;\n for (float t = -30.0; t <= 30.0; t++) {\n float percent = (t + offset - 0.5) / 30.0;\n float weight = 1.0 - abs(percent);\n vec4 sample = texture2D(u_image, v_texCoord + delta * percent * radius / texSize);\n\n sample.rgb *= sample.a;\n\n color += sample * weight;\n total += weight;\n }\n\n gl_FragColor = color / total;\n gl_FragColor.rgb /= gl_FragColor.a + 0.00001;\n }\n ';
this._cachedBlurredCanvas = null;
this._lastBlurRadius = this._options.blurRadius;
this._lastGradientRadius = this._options.gradientRadius;
}
/**
* A unique string that identifies this operation. Can be used to select
* operations.
* @type {String}
*/
/**
* Crops this image using WebGL
* @param {WebGLRenderer} renderer
*/
/* istanbul ignore next */
_createClass(TiltShiftOperation, [{
key: '_renderWebGL',
value: function _renderWebGL(renderer) {
var canvas = renderer.getCanvas();
var canvasSize = new _libMathVector22['default'](canvas.width, canvas.height);
var start = this._options.start.clone();
var end = this._options.end.clone();
if (this._options.numberFormat === 'relative') {
start.multiply(canvasSize);
end.multiply(canvasSize);
}
start.y = canvasSize.y - start.y;
end.y = canvasSize.y - end.y;
var delta = end.clone().subtract(start);
var d = Math.sqrt(delta.x * delta.x + delta.y * delta.y);
var uniforms = {
blurRadius: { type: 'f', value: this._options.blurRadius },
gradientRadius: { type: 'f', value: this._options.gradientRadius },
start: { type: '2f', value: [start.x, start.y] },
end: { type: '2f', value: [end.x, end.y] },
delta: { type: '2f', value: [delta.x / d, delta.y / d] },
texSize: { type: '2f', value: [canvas.width, canvas.height] }
};
if (!this._glslPrograms[renderer.id]) {
this._glslPrograms[renderer.id] = renderer.setupGLSLProgram(null, this._fragmentShader);
}
renderer.runProgram(this._glslPrograms[renderer.id], { uniforms: uniforms });
// Update delta for second pass
uniforms.delta.value = [-delta.y / d, delta.x / d];
renderer.runProgram(this._glslPrograms[renderer.id], { uniforms: uniforms });
}
/**
* Crops the image using Canvas2D
* @param {CanvasRenderer} renderer
*/
}, {
key: '_renderCanvas',
value: function _renderCanvas(renderer) {
var canvas = renderer.getCanvas();
var optionsChanged = this._options.blurRadius !== this._lastBlurRadius || this._options.gradientRadius !== this._lastGradientRadius;
var blurryCanvas = undefined;
if (optionsChanged || this._cachedBlurredCanvas === null) {
// Blur and cache canvas
blurryCanvas = this._blurCanvas(renderer);
this._cachedBlurredCanvas = blurryCanvas;
this._lastBlurRadius = this._options.blurRadius;
this._lastGradientRadius = this._options.gradientRadius;
} else {
// Use cached canvas
blurryCanvas = this._cachedBlurredCanvas;
}
var maskCanvas = this._createMask(renderer);
this._applyMask(canvas, blurryCanvas, maskCanvas);
}
/**
* Creates a blurred copy of the canvas
* @param {CanvasRenderer} renderer
* @return {Canvas}
* @private
*/
}, {
key: '_blurCanvas',
value: function _blurCanvas(renderer) {
var newCanvas = renderer.cloneCanvas();
var blurryContext = newCanvas.getContext('2d');
var blurryImageData = blurryContext.getImageData(0, 0, newCanvas.width, newCanvas.height);
_vendorStackBlur2['default'].stackBlurCanvasRGBA(blurryImageData, 0, 0, newCanvas.width, newCanvas.height, this._options.blurRadius);
blurryContext.putImageData(blurryImageData, 0, 0);
return newCanvas;
}
/**
* Creates the mask canvas
* @param {CanvasRenderer} renderer
* @return {Canvas}
* @private
*/
}, {
key: '_createMask',
value: function _createMask(renderer) {
var canvas = renderer.getCanvas();
var canvasSize = new _libMathVector22['default'](canvas.width, canvas.height);
var gradientRadius = this._options.gradientRadius;
var maskCanvas = renderer.createCanvas(canvas.width, canvas.height);
var maskContext = maskCanvas.getContext('2d');
var start = this._options.start.clone();
var end = this._options.end.clone();
if (this._options.numberFormat === 'relative') {
start.multiply(canvasSize);
end.multiply(canvasSize);
}
var dist = end.clone().subtract(start);
var middle = start.clone().add(dist.clone().divide(2));
var totalDist = Math.sqrt(Math.pow(dist.x, 2) + Math.pow(dist.y, 2));
var factor = dist.clone().divide(totalDist);
var gradientStart = middle.clone().add(gradientRadius * factor.y, -gradientRadius * factor.x);
var gradientEnd = middle.clone().add(-gradientRadius * factor.y, gradientRadius * factor.x);
// Build gradient
var gradient = maskContext.createLinearGradient(gradientStart.x, gradientStart.y, gradientEnd.x, gradientEnd.y);
gradient.addColorStop(0, '#000000');
gradient.addColorStop(0.5, '#FFFFFF');
gradient.addColorStop(1, '#000000');
// Draw gradient
maskContext.fillStyle = gradient;
maskContext.fillRect(0, 0, canvas.width, canvas.height);
return maskCanvas;
}
/**
* Applies the blur and mask to the input canvas
* @param {Canvas} inputCanvas
* @param {Canvas} blurryCanvas
* @param {Canvas} maskCanvas
* @private
*/
}, {
key: '_applyMask',
value: function _applyMask(inputCanvas, blurryCanvas, maskCanvas) {
var inputContext = inputCanvas.getContext('2d');
var blurryContext = blurryCanvas.getContext('2d');
var maskContext = maskCanvas.getContext('2d');
var inputImageData = inputContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height);
var pixels = inputImageData.data;
var blurryPixels = blurryContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height).data;
var maskPixels = maskContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height).data;
for (var i = 0; i < maskPixels.length; i++) {
var alpha = maskPixels[i] / 255;
pixels[i] = alpha * pixels[i] + (1 - alpha) * blurryPixels[i];
}
inputContext.putImageData(inputImageData, 0, 0);
}
/**
* Sets the dirty state of this operation
* @param {Boolean} dirty
* @comment Since blur operations do seperate caching of the
* blurred canvas, we need to invalidate the cache when the
* dirty state changes.
*/
}, {
key: 'dirty',
set: function set(dirty) {
_set(Object.getPrototypeOf(TiltShiftOperation.prototype), 'dirty', dirty, this);
this._cachedBlurredCanvas = null;
},
/**
* Returns the dirty state
* @type {Boolean}
*/
get: function get() {
return _get(Object.getPrototypeOf(TiltShiftOperation.prototype), 'dirty', this);
}
}]);
return TiltShiftOperation;
})(_operation2['default']);
TiltShiftOperation.prototype.identifier = 'tilt-shift';
/**
* Specifies the available options for this operation
* @type {Object}
*/
TiltShiftOperation.prototype.availableOptions = {
start: { type: 'vector2', 'default': new _libMathVector22['default'](0.0, 0.5) },
end: { type: 'vector2', 'default': new _libMathVector22['default'](1.0, 0.5) },
blurRadius: { type: 'number', 'default': 30 },
gradientRadius: { type: 'number', 'default': 50 }
};
exports['default'] = TiltShiftOperation;
module.exports = exports['default'];
//# 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* Photo Editor SDK - photoeditorsdk.com\n * Copyright (c) 2013-2015 9elements GmbH\n *\n * Released under Attribution-NonCommercial 3.0 Unported\n * http://creativecommons.org/licenses/by-nc/3.0/\n *\n * For commercial use, please contact us at contact@9elements.com\n */\n\nimport Operation from './operation'\nimport Vector2 from '../lib/math/vector2'\nimport StackBlur from '../vendor/stack-blur'\n\n/**\n * An operation that can crop out a part of the image\n *\n * @class\n * @alias ImglyKit.Operations.TiltShiftOperation\n * @extends ImglyKit.Operation\n */\nclass TiltShiftOperation extends Operation {\n  constructor (...args) {\n    super(...args)\n\n    /**\n     * The fragment shader used for this operation\n     * @internal Based on evanw's glfx.js tilt shift shader:\n     *           https://github.com/evanw/glfx.js/blob/master/src/filters/blur/tiltshift.js\n     */\n    this._fragmentShader = `\n      precision mediump float;\n      uniform sampler2D u_image;\n      uniform float blurRadius;\n      uniform float gradientRadius;\n      uniform vec2 start;\n      uniform vec2 end;\n      uniform vec2 delta;\n      uniform vec2 texSize;\n      varying vec2 v_texCoord;\n\n      float random(vec3 scale, float seed) {\n        return fract(sin(dot(gl_FragCoord.xyz + seed, scale)) * 43758.5453 + seed);\n      }\n\n      void main() {\n          vec4 color = vec4(0.0);\n          float total = 0.0;\n\n          float offset = random(vec3(12.9898, 78.233, 151.7182), 0.0);\n\n          vec2 normal = normalize(vec2(start.y - end.y, end.x - start.x));\n          float radius = smoothstep(0.0, 1.0, abs(dot(v_texCoord * texSize - start, normal)) / gradientRadius) * blurRadius;\n          for (float t = -30.0; t <= 30.0; t++) {\n              float percent = (t + offset - 0.5) / 30.0;\n              float weight = 1.0 - abs(percent);\n              vec4 sample = texture2D(u_image, v_texCoord + delta * percent * radius / texSize);\n\n              sample.rgb *= sample.a;\n\n              color += sample * weight;\n              total += weight;\n          }\n\n          gl_FragColor = color / total;\n          gl_FragColor.rgb /= gl_FragColor.a + 0.00001;\n      }\n    `\n\n    this._cachedBlurredCanvas = null\n    this._lastBlurRadius = this._options.blurRadius\n    this._lastGradientRadius = this._options.gradientRadius\n  }\n\n  /**\n   * Crops this image using WebGL\n   * @param  {WebGLRenderer} renderer\n   */\n  /* istanbul ignore next */\n  _renderWebGL (renderer) {\n    var canvas = renderer.getCanvas()\n    var canvasSize = new Vector2(canvas.width, canvas.height)\n\n    var start = this._options.start.clone()\n    var end = this._options.end.clone()\n\n    if (this._options.numberFormat === 'relative') {\n      start.multiply(canvasSize)\n      end.multiply(canvasSize)\n    }\n\n    start.y = canvasSize.y - start.y\n    end.y = canvasSize.y - end.y\n\n    var delta = end.clone().subtract(start)\n    var d = Math.sqrt(delta.x * delta.x + delta.y * delta.y)\n\n    var uniforms = {\n      blurRadius: { type: 'f', value: this._options.blurRadius },\n      gradientRadius: { type: 'f', value: this._options.gradientRadius },\n      start: { type: '2f', value: [start.x, start.y] },\n      end: { type: '2f', value: [end.x, end.y] },\n      delta: { type: '2f', value: [delta.x / d, delta.y / d] },\n      texSize: { type: '2f', value: [canvas.width, canvas.height] }\n    }\n\n    if (!this._glslPrograms[renderer.id]) {\n      this._glslPrograms[renderer.id] = renderer.setupGLSLProgram(\n        null,\n        this._fragmentShader\n      )\n    }\n\n    renderer.runProgram(this._glslPrograms[renderer.id], { uniforms })\n\n    // Update delta for second pass\n    uniforms.delta.value = [-delta.y / d, delta.x / d]\n\n    renderer.runProgram(this._glslPrograms[renderer.id], { uniforms })\n  }\n\n  /**\n   * Crops the image using Canvas2D\n   * @param  {CanvasRenderer} renderer\n   */\n  _renderCanvas (renderer) {\n    var canvas = renderer.getCanvas()\n\n    let optionsChanged = this._options.blurRadius !== this._lastBlurRadius ||\n      this._options.gradientRadius !== this._lastGradientRadius\n    let blurryCanvas\n    if (optionsChanged || this._cachedBlurredCanvas === null) {\n      // Blur and cache canvas\n      blurryCanvas = this._blurCanvas(renderer)\n      this._cachedBlurredCanvas = blurryCanvas\n      this._lastBlurRadius = this._options.blurRadius\n      this._lastGradientRadius = this._options.gradientRadius\n    } else {\n      // Use cached canvas\n      blurryCanvas = this._cachedBlurredCanvas\n    }\n\n    var maskCanvas = this._createMask(renderer)\n\n    this._applyMask(canvas, blurryCanvas, maskCanvas)\n  }\n\n  /**\n   * Creates a blurred copy of the canvas\n   * @param  {CanvasRenderer} renderer\n   * @return {Canvas}\n   * @private\n   */\n  _blurCanvas (renderer) {\n    var newCanvas = renderer.cloneCanvas()\n    var blurryContext = newCanvas.getContext('2d')\n    var blurryImageData = blurryContext.getImageData(0, 0, newCanvas.width, newCanvas.height)\n    StackBlur.stackBlurCanvasRGBA(blurryImageData, 0, 0, newCanvas.width, newCanvas.height, this._options.blurRadius)\n    blurryContext.putImageData(blurryImageData, 0, 0)\n\n    return newCanvas\n  }\n\n  /**\n   * Creates the mask canvas\n   * @param  {CanvasRenderer} renderer\n   * @return {Canvas}\n   * @private\n   */\n  _createMask (renderer) {\n    var canvas = renderer.getCanvas()\n\n    var canvasSize = new Vector2(canvas.width, canvas.height)\n    var gradientRadius = this._options.gradientRadius\n\n    var maskCanvas = renderer.createCanvas(canvas.width, canvas.height)\n    var maskContext = maskCanvas.getContext('2d')\n\n    var start = this._options.start.clone()\n    var end = this._options.end.clone()\n\n    if (this._options.numberFormat === 'relative') {\n      start.multiply(canvasSize)\n      end.multiply(canvasSize)\n    }\n\n    let dist = end.clone().subtract(start)\n    let middle = start.clone().add(dist.clone().divide(2))\n\n    let totalDist = Math.sqrt(Math.pow(dist.x, 2) + Math.pow(dist.y, 2))\n    let factor = dist.clone().divide(totalDist)\n\n    let gradientStart = middle.clone()\n      .add(gradientRadius * factor.y, -gradientRadius * factor.x)\n    let gradientEnd = middle.clone()\n      .add(-gradientRadius * factor.y, gradientRadius * factor.x)\n\n    // Build gradient\n    var gradient = maskContext.createLinearGradient(\n      gradientStart.x, gradientStart.y,\n      gradientEnd.x, gradientEnd.y\n    )\n    gradient.addColorStop(0, '#000000')\n    gradient.addColorStop(0.5, '#FFFFFF')\n    gradient.addColorStop(1, '#000000')\n\n    // Draw gradient\n    maskContext.fillStyle = gradient\n    maskContext.fillRect(0, 0, canvas.width, canvas.height)\n\n    return maskCanvas\n  }\n\n  /**\n   * Applies the blur and mask to the input canvas\n   * @param  {Canvas} inputCanvas\n   * @param  {Canvas} blurryCanvas\n   * @param  {Canvas} maskCanvas\n   * @private\n   */\n  _applyMask (inputCanvas, blurryCanvas, maskCanvas) {\n    var inputContext = inputCanvas.getContext('2d')\n    var blurryContext = blurryCanvas.getContext('2d')\n    var maskContext = maskCanvas.getContext('2d')\n\n    var inputImageData = inputContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height)\n    var pixels = inputImageData.data\n    var blurryPixels = blurryContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height).data\n    var maskPixels = maskContext.getImageData(0, 0, inputCanvas.width, inputCanvas.height).data\n\n    for (let i = 0; i < maskPixels.length; i++) {\n      let alpha = maskPixels[i] / 255\n      pixels[i] = alpha * pixels[i] + (1 - alpha) * blurryPixels[i]\n    }\n\n    inputContext.putImageData(inputImageData, 0, 0)\n  }\n\n  /**\n   * Sets the dirty state of this operation\n   * @param {Boolean} dirty\n   * @comment Since blur operations do seperate caching of the\n   *          blurred canvas, we need to invalidate the cache when the\n   *          dirty state changes.\n   */\n  set dirty (dirty) {\n    super.dirty = dirty\n    this._cachedBlurredCanvas = null\n  }\n\n  /**\n   * Returns the dirty state\n   * @type {Boolean}\n   */\n  get dirty () {\n    return super.dirty\n  }\n}\n\n/**\n * A unique string that identifies this operation. Can be used to select\n * operations.\n * @type {String}\n */\nTiltShiftOperation.prototype.identifier = 'tilt-shift'\n\n/**\n * Specifies the available options for this operation\n * @type {Object}\n */\nTiltShiftOperation.prototype.availableOptions = {\n  start: { type: 'vector2', default: new Vector2(0.0, 0.5) },\n  end: { type: 'vector2', default: new Vector2(1.0, 0.5) },\n  blurRadius: { type: 'number', default: 30 },\n  gradientRadius: { type: 'number', default: 50 }\n}\n\nexport default TiltShiftOperation\n"]} |