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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; Eif ('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 _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; _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 { _x2 = parent; _x3 = property; _x4 = 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 _libColor = require('../lib/color');
var _libColor2 = _interopRequireDefault(_libColor);
var DEFAULT_THICKNESS = 0.02;
var DEFAULT_COLOR = new _libColor2['default'](1.0, 0.0, 0.0, 1.0);
/**
* An operation that can draw brushes on the canvas
*
* @class
* @alias ImglyKit.Operations.BrushOperation
* @extends ImglyKit.Operation
*/
var BrushOperation = (function (_Operation) {
_inherits(BrushOperation, _Operation);
function BrushOperation() {
_classCallCheck(this, BrushOperation);
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
_get(Object.getPrototypeOf(BrushOperation.prototype), 'constructor', this).apply(this, args);
this._textureIndex = 1;
/**
* The vertex shader used for this operation
*/
this._vertexShader = '\n attribute vec2 a_position;\n attribute vec2 a_texCoord;\n varying vec2 v_texCoord;\n\n void main() {\n gl_Position = vec4(a_position, 0, 1);\n v_texCoord = a_texCoord;\n }\n ';
/**
* The fragment shader used for this operation
*/
this._fragmentShader = '\n precision mediump float;\n varying vec2 v_texCoord;\n uniform sampler2D u_image;\n uniform sampler2D u_textImage;\n uniform vec2 u_position;\n uniform vec2 u_size;\n\n void main() {\n vec4 color0 = texture2D(u_image, v_texCoord);\n vec2 relative = (v_texCoord - u_position) / u_size;\n\n if (relative.x >= 0.0 && relative.x <= 1.0 &&\n relative.y >= 0.0 && relative.y <= 1.0) {\n\n vec4 color1 = texture2D(u_textImage, relative);\n\n // GL_SOURCE_ALPHA, GL_ONE_MINUS_SOURCE_ALPHA\n gl_FragColor = color1 + color0 * (1.0 - color1.a);\n\n } else {\n\n gl_FragColor = color0;\n\n }\n }\n ';
this._brushCanvas = document.createElement('canvas');
}
/**
* A unique string that identifies this operation. Can be used to select
* operations.
* @type {String}
*/
/**
* Crops this image using WebGL
* @param {WebGLRenderer} renderer
* @private
*/
/* istanbul ignore next */
_createClass(BrushOperation, [{
key: '_renderWebGL',
value: function _renderWebGL(renderer) {
this.renderBrushCanvas(renderer.getCanvas());
var gl = renderer.getContext();
this._setupProgram(renderer);
this._uploadCanvasToTexture(gl, this._brushCanvas);
// use the complete area available
var position = new _libMathVector22['default'](0, 0);
var size = new _libMathVector22['default'](1, 1);
// Execute the shader
renderer.runShader(null, this._fragmentShader, {
uniforms: {
u_textImage: { type: 'i', value: this._textureIndex },
u_position: { type: '2f', value: [position.x, position.y] },
u_size: { type: '2f', value: [size.x, size.y] }
}
});
}
/**
* Uploads pixel-data contained in a canvas onto a texture
* @param {Context} gl gl-context (use renderer.getContext())
* @param {Canvas} canvas A canvas that contains the pixel data for the texture
*/
}, {
key: '_uploadCanvasToTexture',
value: function _uploadCanvasToTexture(gl, canvas) {
gl.activeTexture(gl.TEXTURE0 + this._textureIndex);
this._texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, this._texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
// Set premultiplied alpha
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas);
gl.activeTexture(gl.TEXTURE0);
}
/**
* This method initializes the shaders once
* @param {WebGLRenderer} renderer WebGLRenderer that is used to compile the
* shafers
*/
}, {
key: '_setupProgram',
value: function _setupProgram(renderer) {
if (!this._glslPrograms[renderer.id]) {
this._glslPrograms[renderer.id] = renderer.setupGLSLProgram(this._vertexShader, this._fragmentShader);
}
}
/**
* Renders the brush operation to a canvas
* @param {CanvasRenderer} renderer
* @private
*/
}, {
key: '_renderCanvas',
value: function _renderCanvas(renderer) {
this.renderBrushCanvas(renderer.getCanvas());
var context = renderer.getContext();
context.drawImage(this._brushCanvas, 0, 0);
}
/**
* Renders the brush canvas that will be used as a texture in WebGL
* and as an image in canvas
* @param {Canvas} canvas
* @private
*/
}, {
key: 'renderBrushCanvas',
value: function renderBrushCanvas(outputCanvas) {
var canvas = arguments.length <= 1 || arguments[1] === undefined ? this._brushCanvas : arguments[1];
if (this._dirty) {
var context = canvas.getContext('2d');
context.clearRect(0, 0, canvas.width, canvas.height);
}
if (canvas.width !== outputCanvas.width || canvas.height !== outputCanvas.height) {
canvas.width = outputCanvas.width;
canvas.height = outputCanvas.height;
}
var paths = this._options.paths;
for (var i = 0; i < paths.length; i++) {
var path = paths[i];
path.renderToCanvas(canvas);
}
}
/**
* Creates and adds a new path
* @param {Number} thickness
* @param {Color} color
* @return {BrushOperation.Path}
*/
}, {
key: 'createPath',
value: function createPath(thickness, color) {
var path = new BrushOperation.Path(this, thickness, color);
this._options.paths.push(path);
return path;
}
/**
* returns the longer size of the canvas
* @param {Canvas}
* @return {Number}
*/
}, {
key: '_getLongerSideSize',
value: function _getLongerSideSize(canvas) {
return Math.max(canvas.width, canvas.height);
}
/**
* returns the last color
* @return {Color}
*/
}, {
key: 'getLastColor',
value: function getLastColor() {
var lastPath = this._options.paths[this._options.paths.length - 1];
if (!lastPath) return DEFAULT_COLOR;
return lastPath.getColor();
}
/**
* returns the last thickness
* @return {Thickness}
*/
}, {
key: 'getLastThickness',
value: function getLastThickness() {
var lastPath = this._options.paths[this._options.paths.length - 1];
if (!lastPath) return DEFAULT_THICKNESS;
return lastPath.getThickness();
}
/**
* Gets called when this operation has been set to dirty
* @private
*/
}, {
key: '_onDirty',
value: function _onDirty() {
this._options.paths.forEach(function (path) {
path.setDirty();
});
}
}]);
return BrushOperation;
})(_operation2['default']);
BrushOperation.prototype.identifier = 'brush';
/**
* Specifies the available options for this operation
* @type {Object}
*/
BrushOperation.prototype.availableOptions = {
paths: { type: 'array', 'default': [] }
};
/**
* Represents a path that can be drawn on a canvas
*/
BrushOperation.Path = (function () {
function Path(operation, thickness, color) {
_classCallCheck(this, Path);
this._thickness = thickness;
this._color = color;
this._controlPoints = [];
}
_createClass(Path, [{
key: 'renderToCanvas',
value: function renderToCanvas(canvas) {
if (this._controlPoints.length < 2) return;
var lastControlPoint = this._controlPoints[0];
var controlPoint = lastControlPoint;
for (var i = 1; i < this._controlPoints.length; i++) {
controlPoint = this._controlPoints[i];
controlPoint.renderToCanvas(canvas, lastControlPoint);
lastControlPoint = controlPoint;
}
}
}, {
key: 'addControlPoint',
value: function addControlPoint(position) {
var controlPoint = new BrushOperation.ControlPoint(this, position);
this._controlPoints.push(controlPoint);
}
}, {
key: 'getColor',
value: function getColor() {
return this._color;
}
}, {
key: 'getThickness',
value: function getThickness() {
return this._thickness;
}
}, {
key: 'setDirty',
value: function setDirty() {
this._controlPoints.forEach(function (point) {
point.setDirty();
});
}
}]);
return Path;
})();
/**
* Represents a control point of a path
*/
BrushOperation.ControlPoint = (function () {
function ControlPoint(path, position) {
_classCallCheck(this, ControlPoint);
this._path = path;
this._drawnCanvases = [];
this._position = position;
}
_createClass(ControlPoint, [{
key: 'renderToCanvas',
value: function renderToCanvas(canvas, lastControlPoint) {
if (this._drawnCanvases.indexOf(canvas) !== -1) {
// This control point has already been drawn on this canvas. Ignore.
return;
}
var context = canvas.getContext('2d');
var canvasSize = new _libMathVector22['default'](canvas.width, canvas.height);
var longerSide = Math.max(canvasSize.x, canvasSize.y);
var position = this._position.clone().multiply(canvasSize);
var lastPosition = lastControlPoint.getPosition().clone().multiply(canvasSize);
context.beginPath();
context.lineJoin = 'round';
context.strokeStyle = this._path.getColor().toHex();
context.lineWidth = this._path.getThickness() * longerSide;
context.moveTo(lastPosition.x, lastPosition.y);
context.lineTo(position.x, position.y);
context.closePath();
context.stroke();
this._drawnCanvases.push(canvas);
}
}, {
key: 'getPosition',
value: function getPosition() {
return this._position.clone();
}
}, {
key: 'setDirty',
value: function setDirty() {
this._drawnCanvases = [];
}
}]);
return ControlPoint;
})();
exports['default'] = BrushOperation;
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 Color from '../lib/color'\n\nconst DEFAULT_THICKNESS = 0.02\nconst DEFAULT_COLOR = new Color(1.0, 0.0, 0.0, 1.0)\n\n/**\n * An operation that can draw brushes on the canvas\n *\n * @class\n * @alias ImglyKit.Operations.BrushOperation\n * @extends ImglyKit.Operation\n */\nclass BrushOperation extends Operation {\n  constructor (...args) {\n    super(...args)\n\n    this._textureIndex = 1\n    /**\n     * The vertex shader used for this operation\n     */\n    this._vertexShader = `\n      attribute vec2 a_position;\n      attribute vec2 a_texCoord;\n      varying vec2 v_texCoord;\n\n      void main() {\n        gl_Position = vec4(a_position, 0, 1);\n        v_texCoord = a_texCoord;\n      }\n    `\n\n    /**\n     * The fragment shader used for this operation\n     */\n    this._fragmentShader = `\n      precision mediump float;\n      varying vec2 v_texCoord;\n      uniform sampler2D u_image;\n      uniform sampler2D u_textImage;\n      uniform vec2 u_position;\n      uniform vec2 u_size;\n\n      void main() {\n        vec4 color0 = texture2D(u_image, v_texCoord);\n        vec2 relative = (v_texCoord - u_position) / u_size;\n\n        if (relative.x >= 0.0 && relative.x <= 1.0 &&\n          relative.y >= 0.0 && relative.y <= 1.0) {\n\n            vec4 color1 = texture2D(u_textImage, relative);\n\n            // GL_SOURCE_ALPHA, GL_ONE_MINUS_SOURCE_ALPHA\n            gl_FragColor = color1 + color0 * (1.0 - color1.a);\n\n        } else {\n\n          gl_FragColor = color0;\n\n        }\n      }\n    `\n\n    this._brushCanvas = document.createElement('canvas')\n  }\n\n  /**\n   * Crops this image using WebGL\n   * @param  {WebGLRenderer} renderer\n   * @private\n   */\n  /* istanbul ignore next */\n  _renderWebGL (renderer) {\n    this.renderBrushCanvas(renderer.getCanvas())\n    var gl = renderer.getContext()\n    this._setupProgram(renderer)\n    this._uploadCanvasToTexture(gl, this._brushCanvas)\n\n    // use the complete area available\n    var position = new Vector2(0, 0)\n    var size = new Vector2(1, 1)\n\n    // Execute the shader\n    renderer.runShader(null, this._fragmentShader, {\n      uniforms: {\n        u_textImage: { type: 'i', value: this._textureIndex },\n        u_position: { type: '2f', value: [position.x, position.y] },\n        u_size: { type: '2f', value: [size.x, size.y] }\n      }\n    })\n  }\n\n  /**\n   * Uploads pixel-data contained in a canvas onto a texture\n   * @param  {Context} gl    gl-context (use renderer.getContext())\n   * @param  {Canvas} canvas A canvas that contains the pixel data for the texture\n   */\n  _uploadCanvasToTexture (gl, canvas) {\n    gl.activeTexture(gl.TEXTURE0 + this._textureIndex)\n    this._texture = gl.createTexture()\n    gl.bindTexture(gl.TEXTURE_2D, this._texture)\n\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)\n\n    // Set premultiplied alpha\n    gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true)\n\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas)\n    gl.activeTexture(gl.TEXTURE0)\n  }\n\n  /**\n   * This method initializes the shaders once\n   * @param  {WebGLRenderer} renderer WebGLRenderer that is used to compile the\n   * shafers\n   */\n  _setupProgram (renderer) {\n    if (!this._glslPrograms[renderer.id]) {\n      this._glslPrograms[renderer.id] = renderer.setupGLSLProgram(\n        this._vertexShader,\n        this._fragmentShader\n      )\n    }\n  }\n\n  /**\n   * Renders the brush operation to a canvas\n   * @param  {CanvasRenderer} renderer\n   * @private\n   */\n  _renderCanvas (renderer) {\n    this.renderBrushCanvas(renderer.getCanvas())\n    var context = renderer.getContext()\n    context.drawImage(this._brushCanvas, 0, 0)\n  }\n\n  /**\n   * Renders the brush canvas that will be used as a texture in WebGL\n   * and as an image in canvas\n   * @param {Canvas} canvas\n   * @private\n   */\n  renderBrushCanvas (outputCanvas, canvas = this._brushCanvas) {\n    if (this._dirty) {\n      const context = canvas.getContext('2d')\n      context.clearRect(0, 0, canvas.width, canvas.height)\n    }\n\n    if (canvas.width !== outputCanvas.width ||\n        canvas.height !== outputCanvas.height) {\n      canvas.width = outputCanvas.width\n      canvas.height = outputCanvas.height\n    }\n\n    const paths = this._options.paths\n    for (let i = 0; i < paths.length; i++) {\n      const path = paths[i]\n      path.renderToCanvas(canvas)\n    }\n  }\n\n  /**\n   * Creates and adds a new path\n   * @param {Number} thickness\n   * @param {Color} color\n   * @return {BrushOperation.Path}\n   */\n  createPath (thickness, color) {\n    const path = new BrushOperation.Path(this, thickness, color)\n    this._options.paths.push(path)\n    return path\n  }\n\n  /**\n   * returns the longer size of the canvas\n   * @param {Canvas}\n   * @return {Number}\n   */\n  _getLongerSideSize (canvas) {\n    return Math.max(canvas.width, canvas.height)\n  }\n\n  /**\n   * returns the last color\n   * @return {Color}\n   */\n  getLastColor () {\n    const lastPath = this._options.paths[this._options.paths.length - 1]\n    if (!lastPath) return DEFAULT_COLOR\n    return lastPath.getColor()\n  }\n\n  /**\n   * returns the last thickness\n   * @return {Thickness}\n   */\n  getLastThickness () {\n    const lastPath = this._options.paths[this._options.paths.length - 1]\n    if (!lastPath) return DEFAULT_THICKNESS\n    return lastPath.getThickness()\n  }\n\n  /**\n   * Gets called when this operation has been set to dirty\n   * @private\n   */\n  _onDirty () {\n    this._options.paths.forEach((path) => {\n      path.setDirty()\n    })\n  }\n}\n\n/**\n * A unique string that identifies this operation. Can be used to select\n * operations.\n * @type {String}\n */\nBrushOperation.prototype.identifier = 'brush'\n\n/**\n * Specifies the available options for this operation\n * @type {Object}\n */\nBrushOperation.prototype.availableOptions = {\n  paths: { type: 'array', default: [] }\n}\n\n/**\n * Represents a path that can be drawn on a canvas\n */\nBrushOperation.Path = class Path {\n  constructor (operation, thickness, color) {\n    this._thickness = thickness\n    this._color = color\n    this._controlPoints = []\n  }\n\n  renderToCanvas (canvas) {\n    if (this._controlPoints.length < 2) return\n\n    let lastControlPoint = this._controlPoints[0]\n    let controlPoint = lastControlPoint\n    for (let i = 1; i < this._controlPoints.length; i++) {\n      controlPoint = this._controlPoints[i]\n      controlPoint.renderToCanvas(canvas, lastControlPoint)\n      lastControlPoint = controlPoint\n    }\n  }\n\n  addControlPoint (position) {\n    const controlPoint = new BrushOperation.ControlPoint(this, position)\n    this._controlPoints.push(controlPoint)\n  }\n\n  getColor () {\n    return this._color\n  }\n\n  getThickness () {\n    return this._thickness\n  }\n\n  setDirty () {\n    this._controlPoints.forEach((point) => {\n      point.setDirty()\n    })\n  }\n}\n\n/**\n * Represents a control point of a path\n */\nBrushOperation.ControlPoint = class ControlPoint {\n  constructor (path, position) {\n    this._path = path\n    this._drawnCanvases = []\n    this._position = position\n  }\n\n  renderToCanvas (canvas, lastControlPoint) {\n    if (this._drawnCanvases.indexOf(canvas) !== -1) {\n      // This control point has already been drawn on this canvas. Ignore.\n      return\n    }\n\n    const context = canvas.getContext('2d')\n    const canvasSize = new Vector2(canvas.width, canvas.height)\n    const longerSide = Math.max(canvasSize.x, canvasSize.y)\n\n    const position = this._position.clone().multiply(canvasSize)\n    const lastPosition = lastControlPoint.getPosition()\n      .clone()\n      .multiply(canvasSize)\n\n    context.beginPath()\n    context.lineJoin = 'round'\n    context.strokeStyle = this._path.getColor().toHex()\n    context.lineWidth = this._path.getThickness() * longerSide\n    context.moveTo(lastPosition.x, lastPosition.y)\n    context.lineTo(position.x, position.y)\n    context.closePath()\n    context.stroke()\n    this._drawnCanvases.push(canvas)\n  }\n\n  getPosition () {\n    return this._position.clone()\n  }\n\n  setDirty () {\n    this._drawnCanvases = []\n  }\n}\n\nexport default BrushOperation\n"]} |