Add boolean feature for bitwise image operations (#501)

test/fixtures/index.js

@@ -95,6 +95,8 @@ module.exports = {
   inputPngStripesV: getPath('stripesV.png'),
   inputPngStripesH: getPath('stripesH.png'),
 
+  inputJpgBooleanTest: getPath('booleanTest.jpg'),
+
   inputV: getPath('vfile.v'),
 
   outputJpg: getPath('output.jpg'),

test/unit/boolean.js

@@ -0,0 +1,103 @@
+'use strict';
+
+var fs = require('fs');
+var assert = require('assert');
+var fixtures = require('../fixtures');
+var sharp = require('../../index');
+
+describe('Boolean operation between two images', function() {
+
+  it('\'and\' Operation, file', function(done) {
+    sharp(fixtures.inputJpg) //fixtures.inputJpg
+      .resize(320,240)
+      .boolean(fixtures.inputJpgBooleanTest, 'and')
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_and_result.jpg'), data, done);
+      });
+  });
+
+  it('\'and\' Operation, buffer', function(done) {
+    sharp(fixtures.inputJpg) //fixtures.inputJpg
+      .resize(320,240)
+      .boolean(fs.readFileSync(fixtures.inputJpgBooleanTest), sharp.bool.and)
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_and_result.jpg'), data, done);
+      });
+  });
+
+  it('\'or\' Operation, file', function(done) {
+    sharp(fixtures.inputJpg)
+      .resize(320,240)
+      .boolean(fixtures.inputJpgBooleanTest, sharp.bool.or)
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_or_result.jpg'), data, done);
+      });
+  });
+
+  it('\'or\' Operation, buffer', function(done) {
+    sharp(fixtures.inputJpg)
+      .resize(320,240)
+      .boolean(fs.readFileSync(fixtures.inputJpgBooleanTest), 'or')
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_or_result.jpg'), data, done);
+      });
+  });
+
+  it('\'eor\' Operation, file', function(done) {
+    sharp(fixtures.inputJpg)
+      .resize(320,240)
+      .boolean(fixtures.inputJpgBooleanTest, 'eor')
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_eor_result.jpg'), data, done);
+      });
+  });
+
+  it('\'eor\' Operation, buffer', function(done) {
+    sharp(fixtures.inputJpg)
+      .resize(320,240)
+      .boolean(fs.readFileSync(fixtures.inputJpgBooleanTest), sharp.bool.eor)
+      .toBuffer(function(err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(320, info.width);
+        assert.strictEqual(240, info.height);
+        fixtures.assertSimilar(fixtures.expected('boolean_eor_result.jpg'), data, done);
+      });
+  });
+
+  it('Invalid operation', function() {
+    assert.throws(function() {
+      sharp(fixtures.inputJpg)
+        .boolean(fs.readFileSync(fixtures.inputJpgBooleanTest), 'fail');
+    });
+  });
+
+  it('Invalid operation, non-string', function() {
+    assert.throws(function() {
+      sharp(fixtures.inputJpg)
+        .boolean(fs.readFileSync(fixtures.inputJpgBooleanTest), null);
+    });
+  });
+
+  if('Invalid buffer input', function() {
+    assert.throws(function() {
+      sharp(fixtures.inputJpg)
+        .resize(320,240)
+        .boolean([],'eor');
+    });
+  });
+});