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export: add option to create poster static map #2097

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export: add option to create poster static map #2097

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65 changes: 54 additions & 11 deletions commands/export.bones
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,18 @@ command.options['height'] = {
'default': 400
};

command.options['pages_x'] = {
'title': 'pages_x=[pages_x]',
'description': 'Static export only: produce a tiled poster pages_x pages wide',
'default': 1
};

command.options['pages_y'] = {
'title': 'pages_y=[pages_y]',
'description': 'Static export only: produce a tiled poster pages_y pages high',
'default': 1
};

command.options['url'] = {
'title': 'url=[url]',
'description': 'URL to PUT updates to.'
Expand Down Expand Up @@ -187,6 +199,10 @@ command.prototype.initialize = function(plugin, callback) {
opts.width = parseInt(opts.width, 10);
if (!_(opts.height).isUndefined())
opts.height = parseInt(opts.height, 10);
if (!_(opts.pages_x).isUndefined())
opts.pages_x = parseInt(opts.pages_x) || 1;
if (!_(opts.pages_y).isUndefined())
opts.pages_y = parseInt(opts.pages_y) || 1;
if (!_(opts.metatile).isUndefined())
opts.metatile = parseInt(opts.metatile, 10);
if (!_(opts.scale).isUndefined())
Expand All @@ -198,6 +214,7 @@ command.prototype.initialize = function(plugin, callback) {
}

// Rename the output filepath using a random hash if file already exists.
// TODO: fix this for multiple files in the case of posters
if (existsSync(opts.filepath) &&
_(['png','jpeg','jpg','wepb','tiff','tif','pdf','svg','mbtiles']).include(opts.format)) {
var hash = crypto.createHash('md5')
Expand Down Expand Up @@ -393,17 +410,43 @@ function formatString(string) {

command.prototype.static_map = function(project, callback) {
try {
var map = new mapnik.Map(this.opts.width, this.opts.height);
map.fromStringSync(project.xml, {
strict: false,
base: path.join(this.opts.files, 'project', project.id) + '/'
});
map.extent = sm.convert(project.mml.bounds, '900913');
map.renderFileSync(this.opts.filepath, {
format: this.opts.format,
scale: project.mml.scale,
scale_denominator: this.opts.scale_denominator || 0.0
});
increment_x = (project.mml.bounds[2] - project.mml.bounds[0]) / this.opts.pages_x;
increment_y = (project.mml.bounds[3] - project.mml.bounds[1]) / this.opts.pages_y;

// correct aspect ratio for page size if we're outputing a poster so that tile edges match
var aspect = (project.mml.bounds[2] - project.mml.bounds[0]) /
(project.mml.bounds[3] - project.mml.bounds[1]);
this.opts.height = Math.round(this.opts.height * aspect)

letters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
for (pagex = 1; pagex <= this.opts.pages_x; pagex++) {
for (pagey = 1; pagey <= this.opts.pages_y; pagey++) {
var map = new mapnik.Map(this.opts.width, this.opts.height);
map.fromStringSync(project.xml, {
strict: false,
base: path.join(this.opts.files, 'project', project.id) + '/'
});
page_bounds = [];
page_bounds[0] = project.mml.bounds[0] + increment_x * (pagex - 1);
page_bounds[2] = page_bounds[0] + increment_x;
page_bounds[1] = project.mml.bounds[1] + increment_y * (pagey - 1);
page_bounds[3] = page_bounds[1] + increment_y;
map.extent = sm.convert(page_bounds, '900913');
if ((this.opts.pages_x + this.opts.pages_y) > 2) {
var pageref = letters[pagex - 1] + pagey.toString();
var ext = path.extname(this.opts.filepath);
filepath = this.opts.filepath.replace(ext, '_' + pageref + ext);
} else {
filepath = this.opts.filepath;
}
console.log('Rendering file ' + filepath);
map.renderFileSync(filepath, {
format: this.opts.format,
scale: project.mml.scale,
scale_denominator: this.opts.scale_denominator || 0.0
});
}
}
callback();
} catch(err) {
callback(err);
Expand Down