From 9d25fadd78cc326a29331b2e228d36615d82e61b Mon Sep 17 00:00:00 2001
From: chiq2045 <charles.oroko@outlook.com>
Date: Thu, 14 May 2020 13:03:26 -0700
Subject: [PATCH 1/6] update potrace to handle svg

---
 lib/Potrace.js | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/lib/Potrace.js b/lib/Potrace.js
index 47cf3d6..d0422bb 100644
--- a/lib/Potrace.js
+++ b/lib/Potrace.js
@@ -1075,10 +1075,15 @@ Potrace.prototype = {
   /**
    * Generates just <path> tag without rest of the SVG file
    *
-   * @param {String} [fillColor] - overrides color from parameters
+   * @param {string} [fillColor=auto] - overrides color from parameters
+   * @param {Object} [scale={ x: 1, y: 1 }] - override svg scale
+   * @param {number} [scale.x=1] - scale of the x dimension
+   * @param {number} [scale.y=1] - scale of the y dimension
+   * @param {String} [stroke=none] - override svg stroke value
+   * @param {boolean} [json=false] - return result as a json array of paths
    * @returns {String}
    */
-  getPathTag: function(fillColor, scale) {
+  getPathTag: function(fillColor='auto', scale={ x: 1, y: 1 }, stroke='black', json=false) {
     fillColor = arguments.length === 0 ? this._params.color : fillColor;
 
     if (fillColor === Potrace.COLOR_AUTO) {
@@ -1095,6 +1100,24 @@ Potrace.prototype = {
       this._processed = true;
     }
 
+    if (json) {
+      const tagsArray = [];
+      tagsArray.push({
+        width: this._params.width || this._luminanceData.width,
+        height: this._params.height || this._luminanceData.height
+      });
+      this._pathlist.forEach(path => {
+        tagsArray.push({
+          d: path,
+          fill: fillColor,
+          stroke: stroke,
+          fillRule: 'evenodd'
+        });
+      });
+
+      return tagsArray;
+    }
+
     var tag = '<path d="';
 
     tag += this._pathlist.map(function(path) {

From ec64133c968ae58aa420b31388268292d415db5c Mon Sep 17 00:00:00 2001
From: chiq2045 <charles.oroko@outlook.com>
Date: Thu, 14 May 2020 13:03:26 -0700
Subject: [PATCH 2/6] update potrace to return json paths

---
 lib/Potrace.js | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/lib/Potrace.js b/lib/Potrace.js
index 47cf3d6..d0422bb 100644
--- a/lib/Potrace.js
+++ b/lib/Potrace.js
@@ -1075,10 +1075,15 @@ Potrace.prototype = {
   /**
    * Generates just <path> tag without rest of the SVG file
    *
-   * @param {String} [fillColor] - overrides color from parameters
+   * @param {string} [fillColor=auto] - overrides color from parameters
+   * @param {Object} [scale={ x: 1, y: 1 }] - override svg scale
+   * @param {number} [scale.x=1] - scale of the x dimension
+   * @param {number} [scale.y=1] - scale of the y dimension
+   * @param {String} [stroke=none] - override svg stroke value
+   * @param {boolean} [json=false] - return result as a json array of paths
    * @returns {String}
    */
-  getPathTag: function(fillColor, scale) {
+  getPathTag: function(fillColor='auto', scale={ x: 1, y: 1 }, stroke='black', json=false) {
     fillColor = arguments.length === 0 ? this._params.color : fillColor;
 
     if (fillColor === Potrace.COLOR_AUTO) {
@@ -1095,6 +1100,24 @@ Potrace.prototype = {
       this._processed = true;
     }
 
+    if (json) {
+      const tagsArray = [];
+      tagsArray.push({
+        width: this._params.width || this._luminanceData.width,
+        height: this._params.height || this._luminanceData.height
+      });
+      this._pathlist.forEach(path => {
+        tagsArray.push({
+          d: path,
+          fill: fillColor,
+          stroke: stroke,
+          fillRule: 'evenodd'
+        });
+      });
+
+      return tagsArray;
+    }
+
     var tag = '<path d="';
 
     tag += this._pathlist.map(function(path) {

From c45066817fb50b3b95e5912023cd20b973ab680c Mon Sep 17 00:00:00 2001
From: Charles Oroko <charles.oroko@outlook.com>
Date: Thu, 14 May 2020 18:19:35 -0700
Subject: [PATCH 3/6] update to actually render path string

---
 lib/Potrace.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Potrace.js b/lib/Potrace.js
index d0422bb..3a71ad7 100644
--- a/lib/Potrace.js
+++ b/lib/Potrace.js
@@ -1108,7 +1108,7 @@ Potrace.prototype = {
       });
       this._pathlist.forEach(path => {
         tagsArray.push({
-          d: path,
+          d: utils.renderCurve(path.curve, scale),
           fill: fillColor,
           stroke: stroke,
           fillRule: 'evenodd'
@@ -1190,4 +1190,4 @@ module.exports = Potrace;
  * Jimp module
  * @external Jimp
  * @see https://www.npmjs.com/package/jimp
- */
\ No newline at end of file
+ */

From 8db8de1ae4fe3f295ee2b6ca7a79292d0ec0f85b Mon Sep 17 00:00:00 2001
From: Charles Oroko <charles.oroko@outlook.com>
Date: Tue, 19 May 2020 16:44:33 -0700
Subject: [PATCH 4/6] Add ids to paths

---
 lib/Potrace.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Potrace.js b/lib/Potrace.js
index 3a71ad7..4ca8158 100644
--- a/lib/Potrace.js
+++ b/lib/Potrace.js
@@ -1114,7 +1114,10 @@ Potrace.prototype = {
           fillRule: 'evenodd'
         });
       });
-
+      tagsArray.forEach((path, index) => {
+        path.id = index;
+      });
+      
       return tagsArray;
     }
 

From f9bb144e0678ac439c688473d8a71136b25fdc89 Mon Sep 17 00:00:00 2001
From: Chiq2045 <Charles.Oroko@outlook.com>
Date: Fri, 7 Aug 2020 18:20:19 -0700
Subject: [PATCH 5/6] create new function to get a JSON object of svg file

---
 README.md      |  3 +-
 lib/Potrace.js | 78 ++++++++++++++++++++++++++++++++------------------
 2 files changed, 52 insertions(+), 29 deletions(-)

diff --git a/README.md b/README.md
index b93f660..624e0ac 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ trace.loadImage('path/to/image.png', function(err) {
 
   trace.getSVG(); // returns SVG document contents
   trace.getPathTag(); // will return just <path> tag
+  trace.getJson(); // returns SVG document contents in JSON format
   trace.getSymbol('traced-image'); // will return <symbol> tag with given ID
 });
 
@@ -181,4 +182,4 @@ The GNU General Public License version 2 (GPLv2). Please see [License File](LICE
 [multilevel-thresholding]: http://www.iis.sinica.edu.tw/page/jise/2001/200109_01.pdf
 [potrace-by-kilobtye]: https://github.com/kilobtye/potrace
 [potrace-js-demo]: http://kilobtye.github.io/potrace/
-[jimp]: https://github.com/oliver-moran/jimp
\ No newline at end of file
+[jimp]: https://github.com/oliver-moran/jimp
diff --git a/lib/Potrace.js b/lib/Potrace.js
index 4ca8158..920523e 100644
--- a/lib/Potrace.js
+++ b/lib/Potrace.js
@@ -1075,15 +1075,10 @@ Potrace.prototype = {
   /**
    * Generates just <path> tag without rest of the SVG file
    *
-   * @param {string} [fillColor=auto] - overrides color from parameters
-   * @param {Object} [scale={ x: 1, y: 1 }] - override svg scale
-   * @param {number} [scale.x=1] - scale of the x dimension
-   * @param {number} [scale.y=1] - scale of the y dimension
-   * @param {String} [stroke=none] - override svg stroke value
-   * @param {boolean} [json=false] - return result as a json array of paths
+   * @param {String} [fillColor] - overrides color from parameters
    * @returns {String}
    */
-  getPathTag: function(fillColor='auto', scale={ x: 1, y: 1 }, stroke='black', json=false) {
+  getPathTag: function(fillColor, scale) {
     fillColor = arguments.length === 0 ? this._params.color : fillColor;
 
     if (fillColor === Potrace.COLOR_AUTO) {
@@ -1100,27 +1095,6 @@ Potrace.prototype = {
       this._processed = true;
     }
 
-    if (json) {
-      const tagsArray = [];
-      tagsArray.push({
-        width: this._params.width || this._luminanceData.width,
-        height: this._params.height || this._luminanceData.height
-      });
-      this._pathlist.forEach(path => {
-        tagsArray.push({
-          d: utils.renderCurve(path.curve, scale),
-          fill: fillColor,
-          stroke: stroke,
-          fillRule: 'evenodd'
-        });
-      });
-      tagsArray.forEach((path, index) => {
-        path.id = index;
-      });
-      
-      return tagsArray;
-    }
-
     var tag = '<path d="';
 
     tag += this._pathlist.map(function(path) {
@@ -1169,6 +1143,54 @@ Potrace.prototype = {
         : '') +
       '\t' + this.getPathTag(this._params.color, scale) + '\n' +
       '</svg>';
+  },
+
+  /**
+   * Generates a JSON object with path information
+   *
+   * @param {string} [fillColor=auto] - overrides color from parameters
+   * @param {Object} [scale={ x: 1, y: 1 }] - override svg scale
+   * @param {number} [scale.x=1] - scale of the x dimension
+   * @param {number} [scale.y=1] - scale of the y dimension
+   * @param {String} [stroke=none] - override svg stroke value
+   * @param {boolean} [json=false] - return result as a json array of paths
+   * @returns {Array.<object>}
+   */
+  getJson: function(fillColor='auto', scale={ x: 1, y: 1 }, stroke='black') {
+    fillColor = arguments.length === 0 ? this._params.color : fillColor;
+
+    if (fillColor === Potrace.COLOR_AUTO) {
+      fillColor = this._params.blackOnWhite ? 'black' : 'white';
+    }
+
+    if (!this._imageLoaded) {
+      throw new Error('Image should be loaded first');
+    }
+
+    if (!this._processed) {
+      this._bmToPathlist();
+      this._processPath();
+      this._processed = true;
+    }
+
+    const tags = [];
+    tags.push({
+      width: this._params.width || this._luminanceData.width,
+      height: this._params.height || this._luminanceData.height
+    });
+    this._pathlist.forEach(path => {
+      tags.push({
+        d: utils.renderCurve(path.curve, scale),
+        fill: fillColor,
+        stroke: stroke,
+        fillRule: 'evenodd'
+      });
+    });
+    tags.forEach((path, index) => {
+      path.id = index;
+    });
+    
+    return tags;
   }
 };
 

From 4bab3079d4db45127b7e2c9c6bef153aeab25097 Mon Sep 17 00:00:00 2001
From: Chiq2045 <Charles.Oroko@outlook.com>
Date: Fri, 7 Aug 2020 18:25:16 -0700
Subject: [PATCH 6/6] update potrace version

---
 package-lock.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package-lock.json b/package-lock.json
index f1b28a7..04af346 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "potrace",
-  "version": "2.1.5",
+  "version": "2.1.6",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {