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image.test.js
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"use strict";
var mapnik = require('../');
var assert = require('assert');
var fs = require('fs');
var path = require('path');
mapnik.register_datasource(path.join(mapnik.settings.paths.input_plugins,'gdal.input'));
describe('mapnik.Image ', function() {
it('should throw with invalid usage', function() {
// no 'new' keyword
assert.throws(function() { mapnik.Image(1, 1); }); // jshint ignore:line
// invalid args
assert.throws(function() { new mapnik.Image(); });
assert.throws(function() { new mapnik.Image(1); });
assert.throws(function() { new mapnik.Image(256,256, 999); });
assert.throws(function() { new mapnik.Image(256,256, null); });
assert.throws(function() { new mapnik.Image(256,256,{premultiplied:'asdf'}); });
assert.throws(function() { new mapnik.Image(256,256,{initialize:null}); });
assert.throws(function() { new mapnik.Image(256,256,{painted:null}); });
assert.throws(function() {
new mapnik.Image(256,256, {type:'foo'});
}, /'type' option must be a valid 'mapnik.imageType'/);
assert.throws(function() { new mapnik.Image(256,256,{type:null}); });
assert.throws(function() { new mapnik.Image(256,256,{type:999}); });
assert.throws(function() { new mapnik.Image('foo'); });
assert.throws(function() { new mapnik.Image('a', 'b', 'c'); });
});
it('should initialize image successfully with options', function() {
var options = {
premultiplied: false,
initialize: true,
painted: false,
type: mapnik.imageType.gray8
};
var im1 = new mapnik.Image(256,256,options);
assert.ok(im1);
// Check that it is the same image type, also tests getType
assert.equal(im1.getType(), mapnik.imageType.gray8);
});
it('should throw with invalid encoding', function(done) {
var im = new mapnik.Image(256, 256);
assert.throws(function() { im.encodeSync('foo'); });
assert.throws(function() { im.encodeSync(1); });
assert.throws(function() { im.encodeSync('png', null); });
assert.throws(function() { im.encodeSync('png', {palette:null}); });
assert.throws(function() { im.encodeSync('png', {palette:{}}); });
assert.throws(function() { im.encode('png', {palette:{}}, function(err, result) {}); });
assert.throws(function() { im.encode('png', {palette:null}, function(err, result) {}); });
assert.throws(function() { im.encode('png', null, function(err, result) {}); });
assert.throws(function() { im.encode(1, {}, function(err, result) {}); });
assert.throws(function() { im.encode('png', {}, null); });
im.encode('foo', {}, function(err, result) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should encode with a pallete', function(done) {
var im = new mapnik.Image(256, 256);
var pal = new mapnik.Palette(new Buffer('\xff\x09\x93\xFF\x01\x02\x03\x04','ascii'));
assert.ok(im.encodeSync('png', {palette:pal}));
im.encode('png', {palette:pal}, function(err, result) {
if (err) throw err;
assert.ok(result);
done();
});
});
it('should throw with invalid formats and bad input', function(done) {
var im = new mapnik.Image(256, 256);
assert.throws(function() { im.save('foo','foo'); });
assert.throws(function() { im.save(); });
assert.throws(function() { im.save('file.png', null); });
assert.throws(function() { im.save('foo'); });
assert.throws(function() { im.saveSync(); });
assert.throws(function() { im.saveSync('foo','foo'); });
assert.throws(function() { im.saveSync('file.png', null); });
assert.throws(function() { im.saveSync('foo'); });
assert.throws(function() { im.save(function(err) {}); });
assert.throws(function() { im.save('file.png', null, function(err) {}); });
assert.throws(function() { im.save('foo', function(err) {}); });
im.save('foo','foo', function(err) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should throw with invalid binary read from buffer', function(done) {
assert.throws(function() { new mapnik.Image.fromBytesSync(); });
assert.throws(function() { new mapnik.Image.fromBytes(); });
assert.throws(function() { new mapnik.Image.fromBytes(null); });
assert.throws(function() { new mapnik.Image.fromBytes(null, function(err, result) {}); });
assert.throws(function() { new mapnik.Image.fromBytes({}); });
assert.throws(function() { new mapnik.Image.fromBytes({}, function(err, result) {}); });
assert.throws(function() { new mapnik.Image.fromBytesSync({}); });
assert.throws(function() { new mapnik.Image.fromBytes(new Buffer(0)); });
assert.throws(function() { new mapnik.Image.fromBytes(new Buffer(0), null); });
assert.throws(function() { new mapnik.Image.fromBytesSync(new Buffer(1024)); });
var buffer = new Buffer('\x89\x50\x4E\x47\x0D\x0A\x1A\x0A' + new Array(48).join('\0'), 'binary');
assert.throws(function() { new mapnik.Image.fromBytesSync(buffer); });
buffer = new Buffer('\x89\x50\x4E\x47\x0D\x0A\x1A\x0A', 'binary');
assert.throws(function() { new mapnik.Image.fromBytesSync(buffer); });
var stuff = new mapnik.Image.fromBytes(buffer, function(err, result) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should throw with invalid encoding format 3', function(done) {
var im = new mapnik.Image(256, 256);
im.encode('foo',function(err) {
assert.ok(err);
done();
});
});
it('should be initialized properly', function() {
var im = new mapnik.Image(256, 256);
assert.ok(im instanceof mapnik.Image);
assert.equal(im.width(), 256);
assert.equal(im.height(), 256);
assert.throws(function() { im.view(); });
var v = im.view(0, 0, 256, 256);
assert.ok(v instanceof mapnik.ImageView);
assert.equal(v.width(), 256);
assert.equal(v.height(), 256);
assert.equal(im.encodeSync().length, v.encodeSync().length);
var tmp_filename = './test/tmp/image'+Math.random()+'.png';
im.save(tmp_filename);
var im2 = new mapnik.Image.open(tmp_filename);
assert.ok(im2 instanceof mapnik.Image);
assert.equal(im2.width(), 256);
assert.equal(im2.height(), 256);
assert.equal(im.encodeSync().length, im2.encodeSync().length);
});
it('should be able to open via byte stream', function(done) {
var im = new mapnik.Image(256, 256);
// png
var tmp_filename1 = './test/tmp/image2'+Math.random()+'.png';
im.save(tmp_filename1);
var buffer = fs.readFileSync(tmp_filename1);
var im2 = new mapnik.Image.fromBytesSync(buffer);
assert.ok(im2 instanceof mapnik.Image);
assert.equal(im2.width(), 256);
assert.equal(im2.height(), 256);
assert.equal(im.encodeSync("png32").length, im2.encodeSync("png32").length);
// jpeg
var tmp_filename2 = './test/tmp/image2'+Math.random()+'.jpeg';
im.save(tmp_filename2, 'jpeg', function(err) {
var buffer2 = fs.readFileSync(tmp_filename2);
var im3 = new mapnik.Image.fromBytesSync(buffer2);
assert.ok(im3 instanceof mapnik.Image);
assert.equal(im3.width(), 256);
assert.equal(im3.height(), 256);
assert.equal(im.encodeSync("jpeg").length, im3.encodeSync("jpeg").length);
done();
});
});
it('should be initialized properly via async constructors', function(done) {
var im = new mapnik.Image(256, 256);
var tmp_filename = './test/tmp/image3'+Math.random()+'.png';
im.save(tmp_filename);
mapnik.Image.open(tmp_filename,function(err,im2) {
if (err) throw err;
assert.ok(im2 instanceof mapnik.Image);
assert.equal(im2.width(), 256);
assert.equal(im2.height(), 256);
assert.equal(im.encodeSync().length, im2.encodeSync().length);
mapnik.Image.fromBytes(im.encodeSync(),function(err,im3) {
if (err) throw err;
assert.ok(im3 instanceof mapnik.Image);
assert.equal(im3.width(), 256);
assert.equal(im3.height(), 256);
assert.equal(im.encodeSync("png32").length, im3.encodeSync("png32").length);
done();
});
});
});
it('should support premultiply and demultiply', function(done) {
var im = new mapnik.Image(5,5);
assert.equal(im.premultiplied(), false);
im.premultiplySync();
assert.equal(im.premultiplied(), true);
im.demultiplySync();
assert.equal(im.premultiplied(), false);
assert.throws(function() { im.premultiply(null) });
im.premultiply();
assert.equal(im.premultiplied(), true);
assert.throws(function() { im.demultiply(null) });
im.demultiply();
assert.equal(im.premultiplied(), false);
im.premultiply(function(err, im_res) {
assert.equal(im_res.premultiplied(), true);
im.demultiply(function (err, im_res2) {
assert.equal(im_res.premultiplied(), false);
done();
});
});
});
it('should not be painted after rendering', function(done) {
var im_blank = new mapnik.Image(4, 4);
assert.equal(im_blank.painted(), false);
var m = new mapnik.Map(4, 4);
m.render(im_blank, {},function(err,im_blank) {
assert.equal(im_blank.painted(), false);
done();
});
});
it('should have background set after rendering', function(done) {
var im_blank2 = new mapnik.Image(4, 4);
assert.equal(im_blank2.painted(), false);
var m2 = new mapnik.Map(4, 4);
m2.background = new mapnik.Color('green');
m2.render(im_blank2, {},function(err,im_blank2) {
assert.equal(im_blank2.painted(), false);
assert.equal(im_blank2.getPixel(0,0,{get_color:true}).g, 128);
done();
});
});
it('should be painted after rendering', function(done) {
var im_blank3 = new mapnik.Image(4, 4);
assert.equal(im_blank3.painted(), false);
var m3 = new mapnik.Map(4, 4);
var s = '<Map>';
s += '<Style name="points">';
s += ' <Rule>';
s += ' <PointSymbolizer />';
s += ' </Rule>';
s += '</Style>';
s += '</Map>';
m3.fromStringSync(s);
assert.throws(function() { mapnik.MemoryDatasource({extent: '-180,-90,180,90'}); });
assert.throws(function() { new mapnik.MemoryDatasource(); });
assert.throws(function() { new mapnik.MemoryDatasource(null); });
var params = {
extent:'-180,-90,180,90',
foo: 1,
waffle: 22.2,
fee: true,
boom: {},
lalala: null,
heheheh: undefined
}
var mem_datasource = new mapnik.MemoryDatasource(params);
mem_datasource.add({ 'x': 0, 'y': 0 });
mem_datasource.add({ 'x': 1, 'y': 1 });
mem_datasource.add({ 'x': 2, 'y': 2 });
mem_datasource.add({ 'x': 3, 'y': 3 });
var l = new mapnik.Layer('test');
l.srs = m3.srs;
l.styles = ['points'];
l.datasource = mem_datasource;
var mem_datasource_same = l.datasource;
assert.deepEqual(mem_datasource.parameters(), mem_datasource_same.parameters());
m3.add_layer(l);
m3.zoomAll();
m3.render(im_blank3, {},function(err,im_blank3) {
assert.equal(im_blank3.painted(), true);
done();
});
});
it('should support setting the alpha channel based on the amount of gray', function() {
var gray = new mapnik.Image(256, 256);
gray.fill(new mapnik.Color('white'));
assert.throws(function() { gray.setGrayScaleToAlpha(null) });
assert.throws(function() { gray.setGrayScaleToAlpha({}) });
gray.setGrayScaleToAlpha();
var gray_view = gray.view(0, 0, gray.width(), gray.height());
assert.equal(gray_view.isSolidSync(), true);
var pixel = gray.getPixel(0, 0, {get_color:true});
assert.equal(pixel.r, 255);
assert.equal(pixel.g, 255);
assert.equal(pixel.b, 255);
assert.equal(pixel.a, 255);
gray.fill(new mapnik.Color('black'));
gray.setGrayScaleToAlpha();
var pixel2 = gray.getPixel(0, 0, {get_color:true});
assert.equal(pixel2.r, 255);
assert.equal(pixel2.g, 255);
assert.equal(pixel2.b, 255);
assert.equal(pixel2.a, 0);
gray.setGrayScaleToAlpha(new mapnik.Color('green'));
var pixel3 = gray.getPixel(0, 0, {get_color:true});
assert.equal(pixel3.r, 0);
assert.equal(pixel3.g, 128);
assert.equal(pixel3.b, 0);
assert.equal(pixel3.a, 255);
});
it('should fail to compare', function() {
var im1 = new mapnik.Image(256,256);
var im2 = new mapnik.Image(256,256);
im1.fillSync(new mapnik.Color('blue'));
im2.fillSync(new mapnik.Color('blue'));
assert.throws(function() { im1.compare(null); });
assert.throws(function() { im1.compare({}); });
assert.throws(function() { im1.compare(im2, null); });
assert.throws(function() { im1.compare(im2, {threshold:null}); });
assert.throws(function() { im1.compare(im2, {alpha:null}); });
});
it('should support setting an individual pixel', function() {
var gray = new mapnik.Image(256, 256);
assert.throws(function() { gray.setPixel(); });
assert.throws(function() { gray.setPixel(1); });
assert.throws(function() { gray.setPixel(1,2); });
assert.throws(function() { gray.setPixel(1,2,null); });
assert.throws(function() { gray.setPixel(1,2, {}); });
assert.throws(function() { gray.setPixel(-1,-1,3); });
gray.setPixel(0,0,new mapnik.Color('white'));
assert.throws(function() { gray.getPixel(); });
assert.throws(function() { gray.getPixel(0,0, null); });
assert.throws(function() { gray.getPixel(null,0); });
assert.throws(function() { gray.getPixel(0,null); });
assert.throws(function() { gray.getPixel(0,0, {get_color:null}); });
assert.equal(gray.getPixel(-1,-1), undefined);
var pixel = gray.getPixel(0,0,{get_color:true});
assert.equal(pixel.r, 255);
assert.equal(pixel.g, 255);
assert.equal(pixel.b, 255);
assert.equal(pixel.a, 255);
});
it('should handle setting and getting of a null image ', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.null});
assert.throws(function() { gray.setPixel(0,0,-1); });
assert.throws(function() { gray.setPixel(1,0,0); });
assert.throws(function() { gray.setPixel(2,0,1); });
assert.equal(gray.getPixel(0,0), undefined);
assert.equal(gray.getPixel(1,0), undefined);
assert.equal(gray.getPixel(2,0), undefined);
});
it('should support setting and getting gray8 pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray8});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), 0);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray8s pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray8s});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), -1);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray16 pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray16});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), 0);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray16s pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray16s});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), -1);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray32 pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray32});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), 0);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray32s pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray32s});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), -1);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray32f pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray32f});
gray.setPixel(0,0,-1.9);
gray.setPixel(1,0,0.8);
gray.setPixel(2,0,1.2);
assert(Math.abs(gray.getPixel(0,0) + 1.9) < 1e-7);
assert(Math.abs(gray.getPixel(1,0) - 0.8) < 1e-7);
assert(Math.abs(gray.getPixel(2,0) - 1.2) < 1e-7);
});
it('should support setting and getting gray64 pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray64});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), 0);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray64s pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray64s});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), -1);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support setting and getting gray64f pixel', function() {
var gray = new mapnik.Image(256, 256, {type: mapnik.imageType.gray64f});
gray.setPixel(0,0,-1);
gray.setPixel(1,0,0);
gray.setPixel(2,0,1);
assert.equal(gray.getPixel(0,0), -1);
assert.equal(gray.getPixel(1,0), 0);
assert.equal(gray.getPixel(2,0), 1);
});
it('should support have set_pixel protecting overflow and underflows', function() {
var imx = new mapnik.Image(4, 4, {type: mapnik.imageType.gray16});
imx.setPixel(0,0,12);
imx.setPixel(0,1,-1);
imx.setPixel(1,0,99999);
imx.setPixel(1,1,256);
assert.equal(imx.getPixel(0,0), 12);
assert.equal(imx.getPixel(0,1), 0);
assert.equal(imx.getPixel(1,0), 65535);
assert.equal(imx.getPixel(1,1), 256);
});
it('should support scaling and offset', function() {
var im = new mapnik.Image(4, 4, {type: mapnik.imageType.gray16});
assert.equal(im.scaling, 1);
assert.equal(im.offset, 0);
assert.throws(function() { im.scaling = null });
assert.throws(function() { im.scaling = 0 });
assert.throws(function() { im.offset = null });
im.scaling = 2.2;
im.offset = 1.1;
assert.equal(im.scaling, 2.2);
assert.equal(im.offset, 1.1);
});
it('should fail to copy a null image', function(done) {
var im = new mapnik.Image(4,4,{type: mapnik.imageType.null});
var im3 = new mapnik.Image(4,4,{type: mapnik.imageType.gray8});
assert.throws(function() { var im2 = im.copy(); });
assert.throws(function() { var im2 = im3.copy(mapnik.imageType.null); });
assert.throws(function() { var im2 = im3.copy(mapnik.imageType.gray8, null); });
assert.throws(function() { var im2 = im3.copy(99, function(err, result) {}); });
assert.throws(function() { var im2 = im3.copy(mapnik.imageType.gray8, null, function(err, result) {}); });
assert.throws(function() { var im2 = im3.copy(null, function(err, result) {}); });
assert.throws(function() { var im2 = im3.copySync(99); });
assert.throws(function() { var im2 = im3.copy({}, null); });
assert.throws(function() { var im2 = im3.copySync({scaling:null}); });
assert.throws(function() { var im2 = im3.copySync({offset:null}); });
assert.throws(function() { var im2 = im3.copy({}, null); });
assert.throws(function() { var im2 = im3.copy({scaling:null}, function(err, result) {}); });
assert.throws(function() { var im2 = im3.copy({offset:null}, function(err, result) {}); });
im.copy(function(err, im2) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should support copying from gray16 to gray8', function(done) {
var im = new mapnik.Image(4, 4, {type: mapnik.imageType.gray16});
im.setPixel(0,0,12);
im.setPixel(0,1,-1);
im.setPixel(1,0,99999);
im.setPixel(1,1,256);
assert.throws(function() { var foo = im.copySync(null); });
assert.throws(function() { var foo = im.copySync({scaling:null}); });
assert.throws(function() { var foo = im.copySync({offset:null}); });
assert.throws(function() { var foo = im.copySync(mapnik.imageType.gray8, null); });
assert.throws(function() { var foo = im.copySync(mapnik.imageType.gray8, {offset:null}); });
var im2 = im.copySync(mapnik.imageType.gray8);
assert.equal(im2.getPixel(0,0), 12);
assert.equal(im2.getPixel(0,1), 0);
assert.equal(im2.getPixel(1,0), 255);
assert.equal(im2.getPixel(1,1), 255);
var im3 = im2.copySync(mapnik.imageType.gray16, {offset:1, scaling:2});
assert.equal(im3.scaling, 2);
assert.equal(im3.offset, 1);
assert.equal(im3.getPixel(0,0), 5);
assert.equal(im3.getPixel(0,1), 0);
assert.equal(im3.getPixel(1,0), 127);
assert.equal(im3.getPixel(1,1), 127);
assert.throws(function() { im.copy(null); });
assert.throws(function() { im.copy({scaling:null}); });
assert.throws(function() { im.copy({offset:null}); });
assert.throws(function() { im.copy(mapnik.imageType.gray8, null); });
assert.throws(function() { im.copy(mapnik.imageType.gray8, {offset:null}); });
im.copy(mapnik.imageType.gray8, function(err, im2) {
if (err) throw err;
assert.equal(im2.getPixel(0,0), 12);
assert.equal(im2.getPixel(0,1), 0);
assert.equal(im2.getPixel(1,0), 255);
assert.equal(im2.getPixel(1,1), 255);
im2.copy(mapnik.imageType.gray16, {offset:1, scaling:2}, function (err, im3) {
if (err) throw err;
assert.equal(im3.scaling, 2);
assert.equal(im3.offset, 1);
assert.equal(im3.getPixel(0,0), 5);
assert.equal(im3.getPixel(0,1), 0);
assert.equal(im3.getPixel(1,0), 127);
assert.equal(im3.getPixel(1,1), 127);
done();
});
});
});
it('should support comparing images', function() {
// if width/height don't match should throw
assert.throws(function() { new mapnik.Image(256, 256).compare(new mapnik.Image(256, 255)); });
var one = new mapnik.Image(256, 256);
// two blank images should exactly match
assert.equal(one.compare(new mapnik.Image(256, 256)),0);
// here we set one pixel different
one.setPixel(0,0,new mapnik.Color('white'));
assert.equal(one.compare(new mapnik.Image(256, 256)),1);
// here we set all pixels to be different
one.fill(new mapnik.Color('white'));
assert.equal(one.compare(new mapnik.Image(256, 256)),one.width()*one.height());
// now lets test comparing just rgb and not alpha
var two = new mapnik.Image(256, 256);
// white image but fully alpha
two.fill(new mapnik.Color('rgba(255,255,255,0)'));
assert.equal(two.getPixel(0,0,{get_color:true}).r, 255);
assert.equal(two.getPixel(0,0,{get_color:true}).g, 255);
assert.equal(two.getPixel(0,0,{get_color:true}).b, 255);
assert.equal(two.getPixel(0,0,{get_color:true}).a, 0);
// if we consider alpha all pixels should be different
assert.equal(one.compare(two),one.width()*one.height());
// but ignoring alpha all pixels should pass as the same
assert.equal(one.compare(two,{alpha:false}),0);
// now lets test the threshold option
// a minorly different color should trigger differences
var blank = new mapnik.Image(256, 256);
var blank2 = new mapnik.Image(256, 256);
blank2.setPixel(0,0,new mapnik.Color('rgba(16,16,16,0)'));
// should pass because threshold is 16 by default
assert.equal(blank.compare(blank2),0);
// with 15 or below threshold should fail
assert.equal(blank.compare(blank2,{threshold:15}),1);
});
it('should fail to open', function(done) {
assert.throws(function() { var im = new mapnik.Image.openSync(); });
assert.throws(function() { var im = new mapnik.Image.open(); });
assert.throws(function() { var im = new mapnik.Image.openSync(null); });
assert.throws(function() { var im = new mapnik.Image.openSync('./PATH/FILE_DOES_NOT_EXIST.tiff'); });
assert.throws(function() { var im = new mapnik.Image.openSync('./test/data/markers.xml'); });
assert.throws(function() { var im = new mapnik.Image.openSync('./test/images/corrupt-10x10.png'); });
assert.throws(function() { var im = new mapnik.Image.open(null, function(err, result) {}); });
assert.throws(function() { var im = new mapnik.Image.open('./test/images/10x10.png', null); });
mapnik.Image.open('./PATH/FILE_DOES_NOT_EXIST.tiff', function(err, result) {
assert.throws(function() { if (err) throw err; });
mapnik.Image.open('./test/data/markers.xml', function(err, result) {
assert.throws(function() { if (err) throw err; });
mapnik.Image.open('./test/images/corrupt-10x10.png', function(err, result) {
assert.throws(function() { if (err) throw err; });
done();
});
});
});
});
it('should be able to open and save jpeg', function(done) {
var im = new mapnik.Image(10,10);
im.fill(new mapnik.Color('green'));
var filename = './test/data/images/10x10.jpeg';
// sync open
assert.equal(0,im.compare(new mapnik.Image.open(filename)));
// sync fromBytes
assert.equal(0,im.compare(new mapnik.Image.fromBytesSync(im.encodeSync("jpeg"))));
// async open
mapnik.Image.open(filename,function(err,im2) {
if (err) throw err;
assert.equal(0,im.compare(im2));
// async fromBytes
mapnik.Image.fromBytes(im.encodeSync("jpeg"),function(err,im3) {
if (err) throw err;
assert.equal(0,im.compare(im3));
done();
});
});
});
it('should be able to open and save tiff', function(done) {
var im = new mapnik.Image(10,10);
im.fill(new mapnik.Color('green'));
var filename = './test/data/images/10x10.tiff';
// sync open
assert.equal(0,im.compare(new mapnik.Image.open(filename)));
// sync fromBytes
assert.equal(0,im.compare(new mapnik.Image.fromBytesSync(im.encodeSync("tiff"))));
// async open
mapnik.Image.open(filename,function(err,im2) {
if (err) throw err;
assert.equal(0,im.compare(im2));
// async fromBytes
mapnik.Image.fromBytes(im.encodeSync("tiff"),function(err,im3) {
if (err) throw err;
assert.equal(0,im.compare(im3));
done();
});
});
});
it('isSolid async works if true', function(done) {
var im = new mapnik.Image(256, 256);
assert.throws(function() { im.isSolid(null); });
assert.equal(im.isSolid(), true);
assert.equal(im.isSolidSync(), true);
im.isSolid(function(err,solid,pixel) {
assert.equal(solid, true);
assert.equal(pixel, 0);
done();
});
});
it('isSolid should fail as not solid', function(done) {
var im = new mapnik.Image(256, 256);
im.setPixel(0,0,new mapnik.Color('green'));
assert.equal(im.isSolid(), false);
assert.equal(im.isSolidSync(), false);
im.isSolid(function(err,solid,pixel) {
assert.equal(solid, false);
done();
});
});
it('isSolid fails', function(done) {
var im = new mapnik.Image(0, 0);
assert.throws(function() { im.isSolidSync(); });
assert.throws(function() { im.isSolid(); });
im.isSolid(function(err,solid,pixel) {
assert.throws(function() { if (err) throw err });
done();
});
});
it('isSolid async works if true and white', function(done) {
var im = new mapnik.Image(256, 256);
var color = new mapnik.Color('white');
im.fill(color);
assert.equal(im.isSolidSync(), true);
im.isSolid(function(err,solid,pixel) {
assert.equal(solid, true);
assert.equal(pixel, 0xffffffff);
done();
});
});
it('isSolid async works if false', function(done) {
var im = new mapnik.Image.open('./test/support/a.png');
assert.equal(im.isSolidSync(), false);
im.isSolid(function(err,solid,pixel) {
assert.equal(solid, false);
assert.equal(pixel, undefined);
done();
});
});
it('fill fails', function(done) {
var im = new mapnik.Image(5,5, {type: mapnik.imageType.null});
assert.throws(function() { im.fillSync(new mapnik.Color('blue')); });
assert.throws(function() { im.fillSync({}); });
assert.throws(function() { im.fillSync(); });
assert.throws(function() { im.fillSync(0); });
assert.throws(function() { im.fillSync(null); });
assert.throws(function() { im.fill(null, function(err, result) {}); });
assert.throws(function() { im.fill({}, function(err, result) {}); });
assert.throws(function() { im.fill(1, null); });
im.fill(new mapnik.Color('blue'), function(err, result) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('fill sync works', function() {
var im = new mapnik.Image(5,5);
im.fillSync(new mapnik.Color('blue'));
assert.equal(im.getPixel(0,0), 4294901760);
im.fillSync(-1);
assert.equal(im.getPixel(0,0), 0);
im.fillSync(1);
assert.equal(im.getPixel(0,0), 1);
im.fillSync(1.99);
assert.equal(im.getPixel(0,0), 1);
});
it('fill async works - color', function(done) {
var im = new mapnik.Image(5,5);
im.fill(new mapnik.Color('blue'), function(err, im_res) {
if (err) throw err;
assert.equal(im_res.getPixel(0,0), 4294901760);
done();
});
});
it('fill async works - int', function(done) {
var im = new mapnik.Image(5,5);
im.fill(-1, function(err, im_res) {
if (err) throw err;
assert.equal(im_res.getPixel(0,0), 0);
done();
});
});
it('fill async works - uint', function(done) {
var im = new mapnik.Image(5,5);
im.fill(1, function(err, im_res) {
if (err) throw err;
assert.equal(im_res.getPixel(0,0), 1);
done();
});
});
it('fill async works - double', function(done) {
var im = new mapnik.Image(5,5);
im.fill(1.99, function(err, im_res) {
if (err) throw err;
assert.equal(im_res.getPixel(0,0), 1);
done();
});
});
it('clear fails', function(done) {
var im = new mapnik.Image(5,5,{type: mapnik.imageType.null});
assert.throws(function() { im.clear(); });
assert.throws(function() { im.clearSync(); });
assert.throws(function() { im.clear(null); });
im.clear(function(err,im_res) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('clear sync', function() {
var im = new mapnik.Image(5,5);
im.fillSync(1);
assert.equal(im.getPixel(0,0), 1);
im.clearSync();
assert.equal(im.getPixel(0,0), 0);
});
it('clear async', function(done) {
var im = new mapnik.Image(5,5);
im.fillSync(1);
assert.equal(im.getPixel(0,0), 1);
im.clear(function(err,im_res) {
assert.equal(im_res.getPixel(0,0), 0);
done();
});
});
if (mapnik.versions.mapnik_number >= 200300) {
it('should be able to open and save webp', function(done) {
var im = new mapnik.Image(10,10);
im.fill(new mapnik.Color('green'));
var filename = './test/data/images/10x10.webp';
// sync open
assert.equal(0,im.compare(new mapnik.Image.open(filename)));
// sync fromBytes
assert.equal(0,im.compare(new mapnik.Image.fromBytesSync(im.encodeSync("webp"))));
// async open
mapnik.Image.open(filename,function(err,im2) {
if (err) throw err;
assert.equal(0,im.compare(im2));
// async fromBytes
mapnik.Image.fromBytes(im.encodeSync("webp"),function(err,im3) {
if (err) throw err;
assert.equal(0,im.compare(im3));
done();
});
});
});
}
it('should fail to resize image with bad input', function(done) {
var im = new mapnik.Image(4,4,{type: mapnik.imageType.null});
var im3 = new mapnik.Image(4,4,{type: mapnik.imageType.gray8});
assert.throws(function() { var im2 = im.resize(4,4); });
assert.throws(function() { var im2 = im3.resizeSync(); });
assert.throws(function() { var im2 = im3.resize(3); });
assert.throws(function() { var im2 = im3.resize(3,null); });
assert.throws(function() { var im2 = im3.resize(99, function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(99, null, function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(null,99,function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(-1,99,function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(99,-1,function(err, result) {}); });
assert.throws(function() { var im2 = im3.resizeSync(99); });
assert.throws(function() { var im2 = im3.resizeSync(99,null); });
assert.throws(function() { var im2 = im3.resizeSync(null,99); });
assert.throws(function() { var im2 = im3.resizeSync(-1,99); });
assert.throws(function() { var im2 = im3.resizeSync(99,-1); });
assert.throws(function() { var im2 = im3.resize(99,99, null); });
assert.throws(function() { var im2 = im3.resizeSync(99,99,{scaling_method:null}); });
assert.throws(function() { var im2 = im3.resizeSync(99,99,{filter_factor:null}); });
assert.throws(function() { var im2 = im3.resizeSync(99,99,{scaling_method:999}); });
assert.throws(function() { var im2 = im3.resize(99,99, null,function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(99,99,{scaling_method:null}, function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(99,99,{scaling_method:999}, function(err, result) {}); });
assert.throws(function() { var im2 = im3.resize(99,99,{filter_factor:null}, function(err, result) {}); });
im.resize(99,99,function(err, im2) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should fail because image is size of zero when trying to resize', function(done) {
var im = new mapnik.Image(0,0,{type: mapnik.imageType.gray8});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
im.resize(4,4,function(err, im2) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should fail on types not currently supported by resize', function() {
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray8s});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray16s});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray32});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray32s});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray64});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray64s});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
var im = new mapnik.Image(4,4,{type: mapnik.imageType.gray64f});
assert.throws(function() { var im2 = im.resizeSync(4,4); });
});
it('should fail to resize resize - not premultiplied rgba8', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.resize(100,100, {scaling_method:mapnik.imageScaling.near, filter_factor:1.0}, function(err, result) {
assert.throws(function() { if (err) throw err; });
done();
});
});
it('should resize image up grayscale - nearest neighbor', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.tif');
im.premultiply();
im.resize(100,100, {scaling_method:mapnik.imageScaling.near, filter_factor:1.0}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-100x100-near.tif';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'tif');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image down grayscale - nearest neighbor', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.tif');
im.premultiply();
im.resize(50,50, {scaling_method:mapnik.imageScaling.near}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-50x50-near.tif';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'tif');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image up - nearest neighbor', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(100,100, {scaling_method:mapnik.imageScaling.near, filter_factor:1.0}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-100x100-near.png';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'png');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image down - nearest neighbor', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(50,50, {scaling_method:mapnik.imageScaling.near}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-50x50-near.png';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'png');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image up - bilinear', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(100,100, {scaling_method:mapnik.imageScaling.bilinear}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-100x100-bilinear.png';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'png');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image down - bilinear', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(50,50, {scaling_method:mapnik.imageScaling.bilinear}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-50x50-bilinear.png';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'png');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image up - bicubic', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(100,100, {scaling_method:mapnik.imageScaling.bicubic}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-100x100-bicubic.png';
if (!fs.existsSync(expected) || process.env.UPDATE ) {
result.save(expected, 'png');
}
var im2 = new mapnik.Image.open(expected);
assert.equal(0, result.compare(im2, {threshold:8}));
done();
});
});
it('should resize image down - bicubic', function(done) {
var im = new mapnik.Image.open('test/data/images/sat_image.png');
im.premultiply();
im.resize(50,50, {scaling_method:mapnik.imageScaling.bicubic}, function(err, result) {
if (err) throw err;
var expected = 'test/data/images/sat_image-expected-50x50-bicubic.png';