@jimp/utils - npm Package Compare versions

Comparing version 0.6.8 to 0.7.0

dist/index.js

@@ -11,3 +11,10 @@ "use strict";
 exports.scan = scan;
+exports.scanIterator = scanIterator;
 
+require("regenerator-runtime/runtime");
+
+var _marked =
+/*#__PURE__*/
+regeneratorRuntime.mark(scanIterator);
+
 function isNodePattern(cb) {
@@ -53,2 +60,57 @@ if (typeof cb === 'undefined') {
 }
+
+function scanIterator(image, x, y, w, h) {
+  var _y, _x, idx;
+
+  return regeneratorRuntime.wrap(function scanIterator$(_context) {
+    while (1) {
+      switch (_context.prev = _context.next) {
+        case 0:
+          // round input
+          x = Math.round(x);
+          y = Math.round(y);
+          w = Math.round(w);
+          h = Math.round(h);
+          _y = y;
+
+        case 5:
+          if (!(_y < y + h)) {
+            _context.next = 17;
+            break;
+          }
+
+          _x = x;
+
+        case 7:
+          if (!(_x < x + w)) {
+            _context.next = 14;
+            break;
+          }
+
+          idx = image.bitmap.width * _y + _x << 2;
+          _context.next = 11;
+          return {
+            x: _x,
+            y: _y,
+            idx: idx,
+            image: image
+          };
+
+        case 11:
+          _x++;
+          _context.next = 7;
+          break;
+
+        case 14:
+          _y++;
+          _context.next = 5;
+          break;
+
+        case 17:
+        case "end":
+          return _context.stop();
+      }
+    }
+  }, _marked, this);
+}
 //# sourceMappingURL=index.js.map

es/index.js

@@ -0,1 +1,5 @@
+var _marked =
+/*#__PURE__*/
+regeneratorRuntime.mark(scanIterator);
+
 export function isNodePattern(cb) {
@@ -39,2 +43,56 @@ if (typeof cb === 'undefined') {
 }
+export function scanIterator(image, x, y, w, h) {
+  var _y, _x, idx;
+
+  return regeneratorRuntime.wrap(function scanIterator$(_context) {
+    while (1) {
+      switch (_context.prev = _context.next) {
+        case 0:
+          // round input
+          x = Math.round(x);
+          y = Math.round(y);
+          w = Math.round(w);
+          h = Math.round(h);
+          _y = y;
+
+        case 5:
+          if (!(_y < y + h)) {
+            _context.next = 17;
+            break;
+          }
+
+          _x = x;
+
+        case 7:
+          if (!(_x < x + w)) {
+            _context.next = 14;
+            break;
+          }
+
+          idx = image.bitmap.width * _y + _x << 2;
+          _context.next = 11;
+          return {
+            x: _x,
+            y: _y,
+            idx: idx,
+            image: image
+          };
+
+        case 11:
+          _x++;
+          _context.next = 7;
+          break;
+
+        case 14:
+          _y++;
+          _context.next = 5;
+          break;
+
+        case 17:
+        case "end":
+          return _context.stop();
+      }
+    }
+  }, _marked, this);
+}
 //# sourceMappingURL=index.js.map

package.json

 {
   "name": "@jimp/utils",
-  "version": "0.6.8",
+  "version": "0.7.0",
   "description": "Utils for jimp extensions.",
@@ -24,3 +24,3 @@ "main": "dist/index.js",
   },
-  "gitHead": "aa937725a7db4f33c68cbab36ab5cf942f4b90ff"
+  "gitHead": "cd5ff6a525c0e547fb0b8172a864d98c4ed7d5fd"
 }

README.md

@@ -53,1 +53,11 @@ <div align="center">
 ```
+
+### scanIterator
+
+It's possible to make an iterator scan with a `for ... of`, if you want to `break` the scan before it reaches the end, but note, that this iterator has a huge performance implication:
+
+```js
+for (const { x, y, idx, image } of scanIterator(image, 0, 0, image.bitmap.width, image.bitmap.height)) {
+    
+}
+```

src/index.js

@@ -41,1 +41,16 @@ export function isNodePattern(cb) {
 }
+
+export function* scanIterator(image, x, y, w, h) {
+  // round input
+  x = Math.round(x);
+  y = Math.round(y);
+  w = Math.round(w);
+  h = Math.round(h);
+
+  for (let _y = y; _y < y + h; _y++) {
+    for (let _x = x; _x < x + w; _x++) {
+      const idx = (image.bitmap.width * _y + _x) << 2;
+      yield { x: _x, y: _y, idx, image };
+    }
+  }
+}

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Improved metrics

Total package byte prevSize

15627

increased by54.91%

Lines of code

217

increased by108.65%

Number of lines in readme file

63

increased by18.87%

No dependency changes