python: add better handling of cairo/pycairo support, refactor rundemo.py, add basic tests for cairo surfaces (closes #392)
This commit is contained in:
Dane Springmeyer
parent
213384c7e3
commit
16f4efc07b
5 changed files with 175 additions and 87 deletions
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@ -73,6 +73,7 @@ void export_view_transform();
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#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
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#include <pycairo.h>
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static Pycairo_CAPI_t *Pycairo_CAPI;
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#endif
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void render(const mapnik::Map& map,mapnik::Image32& image, unsigned offset_x = 0, unsigned offset_y = 0)
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@ -231,15 +232,35 @@ unsigned mapnik_svn_revision()
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#endif
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}
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// indicator for cairo rendering support inside libmapnik
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bool has_cairo()
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{
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#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
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#if defined(HAVE_CAIRO)
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return true;
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#else
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return false;
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#endif
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}
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// indicator for pycairo support in the python bindings
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bool has_pycairo()
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{
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#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
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Pycairo_IMPORT;
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/*!
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Case where pycairo support has been compiled into
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mapnik but at runtime the cairo python module
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is unable to be imported and therefore Pycairo surfaces
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and contexts cannot be passed to mapnik.render()
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*/
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if (Pycairo_CAPI == NULL) return false;
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return true;
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#else
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return false;
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#endif
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}
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BOOST_PYTHON_FUNCTION_OVERLOADS(load_map_overloads, load_map, 2, 3);
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BOOST_PYTHON_FUNCTION_OVERLOADS(load_map_string_overloads, load_map_string, 2, 3);
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BOOST_PYTHON_FUNCTION_OVERLOADS(save_map_overloads, save_map, 2, 3);
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@ -448,6 +469,7 @@ BOOST_PYTHON_MODULE(_mapnik)
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def("mapnik_version", &mapnik_version,"Get the Mapnik version number");
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def("mapnik_svn_revision", &mapnik_svn_revision,"Get the Mapnik svn revision");
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def("has_cairo", &has_cairo, "Get cairo library status");
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def("has_pycairo", &has_pycairo, "Get pycairo module status");
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using mapnik::symbolizer;
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class_<symbolizer>("Symbolizer",no_init)
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@ -58,6 +58,8 @@ void register_cairo()
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{
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Pycairo_IMPORT;
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if (Pycairo_CAPI == NULL) return;
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boost::python::converter::registry::insert(&extract_surface, boost::python::type_id<PycairoSurface>());
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boost::python::converter::registry::insert(&extract_context, boost::python::type_id<PycairoContext>());
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}
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@ -24,7 +24,7 @@
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# will want to be more selective.
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try:
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from mapnik import *
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import mapnik
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except:
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print '\n\nThe mapnik library and python bindings must have been compiled and \
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installed successfully before running this script.\n\n'
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@ -33,11 +33,11 @@ installed successfully before running this script.\n\n'
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# Instanciate a map, giving it a width and height. Remember: the word "map" is
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# reserved in Python! :)
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m = Map(800,600,"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs")
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m = mapnik.Map(800,600,"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs")
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# Set its background colour. More on colours later ...
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m.background = Color('white')
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m.background = mapnik.Color('white')
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# Now we can start adding layers, in stacking order (i.e. bottom layer first)
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@ -58,9 +58,9 @@ m.background = Color('white')
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# password='mypassword'
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# table= TODO
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provpoly_lyr = Layer('Provinces')
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provpoly_lyr = mapnik.Layer('Provinces')
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provpoly_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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provpoly_lyr.datasource = Shapefile(file='../data/boundaries', encoding='latin1')
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provpoly_lyr.datasource = mapnik.Shapefile(file='../data/boundaries', encoding='latin1')
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# We then define a style for the layer. A layer can have one or many styles.
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# Styles are named, so they can be shared across different layers.
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@ -70,18 +70,18 @@ provpoly_lyr.datasource = Shapefile(file='../data/boundaries', encoding='latin1'
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# multiple styles in one layer is the same has having multiple layers.
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# The paradigm is useful mostly as a convenience.
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provpoly_style = Style()
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provpoly_style = mapnik.Style()
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# A Style needs one or more rules. A rule will normally consist of a filter
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# for feature selection, and one or more symbolizers.
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provpoly_rule_on = Rule()
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provpoly_rule_on = mapnik.Rule()
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# A Filter() allows the selection of features to which the symbology will
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# be applied. More on Mapnik expressions can be found in Tutorial #2.
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# A given feature can only match one filter per rule per style.
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provpoly_rule_on.filter = Filter("[NAME_EN] = 'Ontario'")
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provpoly_rule_on.filter = mapnik.Filter("[NAME_EN] = 'Ontario'")
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# Here a symbolizer is defined. Available are:
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# - LineSymbolizer(Color(),<width>)
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@ -95,12 +95,12 @@ provpoly_rule_on.filter = Filter("[NAME_EN] = 'Ontario'")
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# - Color(<string>) where <string> will be something like '#00FF00'
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# or '#0f0' or 'green'
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provpoly_rule_on.symbols.append(PolygonSymbolizer(Color(250, 190, 183)))
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provpoly_rule_on.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color(250, 190, 183)))
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provpoly_style.rules.append(provpoly_rule_on)
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provpoly_rule_qc = Rule()
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provpoly_rule_qc.filter = Filter("[NOM_FR] = 'Québec'")
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provpoly_rule_qc.symbols.append(PolygonSymbolizer(Color(217, 235, 203)))
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provpoly_rule_qc = mapnik.Rule()
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provpoly_rule_qc.filter = mapnik.Filter("[NOM_FR] = 'Québec'")
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provpoly_rule_qc.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color(217, 235, 203)))
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provpoly_style.rules.append(provpoly_rule_qc)
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# Add the style to the map, giving it a name. This is the name that will be
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@ -123,14 +123,14 @@ m.layers.append(provpoly_lyr)
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# A simple example ...
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qcdrain_lyr = Layer('Quebec Hydrography')
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qcdrain_lyr = mapnik.Layer('Quebec Hydrography')
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qcdrain_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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qcdrain_lyr.datasource = Shapefile(file='../data/qcdrainage')
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qcdrain_lyr.datasource = mapnik.Shapefile(file='../data/qcdrainage')
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qcdrain_style = Style()
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qcdrain_rule = Rule()
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qcdrain_rule.filter = Filter('[HYC] = 8')
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qcdrain_rule.symbols.append(PolygonSymbolizer(Color(153, 204, 255)))
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qcdrain_style = mapnik.Style()
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qcdrain_rule = mapnik.Rule()
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qcdrain_rule.filter = mapnik.Filter('[HYC] = 8')
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qcdrain_rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color(153, 204, 255)))
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qcdrain_style.rules.append(qcdrain_rule)
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m.append_style('drainage', qcdrain_style)
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@ -141,31 +141,31 @@ m.layers.append(qcdrain_lyr)
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# attributes, and same desired style), so we're going to
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# re-use the style defined in the above layer for the next one.
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ondrain_lyr = Layer('Ontario Hydrography')
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ondrain_lyr = mapnik.Layer('Ontario Hydrography')
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ondrain_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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ondrain_lyr.datasource = Shapefile(file='../data/ontdrainage')
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ondrain_lyr.datasource = mapnik.Shapefile(file='../data/ontdrainage')
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ondrain_lyr.styles.append('drainage')
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m.layers.append(ondrain_lyr)
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# Provincial boundaries
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provlines_lyr = Layer('Provincial borders')
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provlines_lyr = mapnik.Layer('Provincial borders')
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provlines_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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provlines_lyr.datasource = Shapefile(file='../data/boundaries_l')
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provlines_lyr.datasource = mapnik.Shapefile(file='../data/boundaries_l')
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# Here we define a "dash dot dot dash" pattern for the provincial boundaries.
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provlines_stk = Stroke()
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provlines_stk = mapnik.Stroke()
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provlines_stk.add_dash(8, 4)
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provlines_stk.add_dash(2, 2)
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provlines_stk.add_dash(2, 2)
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provlines_stk.color = Color('black')
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provlines_stk.color = mapnik.Color('black')
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provlines_stk.width = 1.0
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provlines_style = Style()
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provlines_rule = Rule()
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provlines_rule.symbols.append(LineSymbolizer(provlines_stk))
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provlines_style = mapnik.Style()
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provlines_rule = mapnik.Rule()
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provlines_rule.symbols.append(mapnik.LineSymbolizer(provlines_stk))
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provlines_style.rules.append(provlines_rule)
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m.append_style('provlines', provlines_style)
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@ -174,22 +174,22 @@ m.layers.append(provlines_lyr)
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# Roads 3 and 4 (The "grey" roads)
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roads34_lyr = Layer('Roads')
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roads34_lyr = mapnik.Layer('Roads')
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roads34_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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# create roads datasource (we're going to re-use it later)
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roads34_lyr.datasource = Shapefile(file='../data/roads')
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roads34_lyr.datasource = mapnik.Shapefile(file='../data/roads')
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roads34_style = Style()
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roads34_rule = Rule()
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roads34_rule.filter = Filter('[CLASS] = 3 or [CLASS] = 4')
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roads34_style = mapnik.Style()
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roads34_rule = mapnik.Rule()
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roads34_rule.filter = mapnik.Filter('[CLASS] = 3 or [CLASS] = 4')
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# With lines of a certain width, you can control how the ends
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# are closed off using line_cap as below.
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roads34_rule_stk = Stroke()
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roads34_rule_stk.color = Color(171,158,137)
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roads34_rule_stk.line_cap = line_cap.ROUND_CAP
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roads34_rule_stk = mapnik.Stroke()
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roads34_rule_stk.color = mapnik.Color(171,158,137)
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roads34_rule_stk.line_cap = mapnik.line_cap.ROUND_CAP
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# Available options are:
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# line_cap: BUTT_CAP, SQUARE_CAP, ROUND_CAP
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@ -199,7 +199,7 @@ roads34_rule_stk.line_cap = line_cap.ROUND_CAP
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# can be set to a numerical value.
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roads34_rule_stk.width = 2.0
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roads34_rule.symbols.append(LineSymbolizer(roads34_rule_stk))
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roads34_rule.symbols.append(mapnik.LineSymbolizer(roads34_rule_stk))
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roads34_style.rules.append(roads34_rule)
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m.append_style('smallroads', roads34_style)
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@ -208,31 +208,31 @@ m.layers.append(roads34_lyr)
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# Roads 2 (The thin yellow ones)
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roads2_lyr = Layer('Roads')
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roads2_lyr = mapnik.Layer('Roads')
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roads2_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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# Just get a copy from roads34_lyr
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roads2_lyr.datasource = roads34_lyr.datasource
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roads2_style_1 = Style()
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roads2_rule_1 = Rule()
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roads2_rule_1.filter = Filter('[CLASS] = 2')
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roads2_rule_stk_1 = Stroke()
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roads2_rule_stk_1.color = Color(171,158,137)
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roads2_rule_stk_1.line_cap = line_cap.ROUND_CAP
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roads2_style_1 = mapnik.Style()
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roads2_rule_1 = mapnik.Rule()
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roads2_rule_1.filter = mapnik.Filter('[CLASS] = 2')
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roads2_rule_stk_1 = mapnik.Stroke()
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roads2_rule_stk_1.color = mapnik.Color(171,158,137)
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roads2_rule_stk_1.line_cap = mapnik.line_cap.ROUND_CAP
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roads2_rule_stk_1.width = 4.0
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roads2_rule_1.symbols.append(LineSymbolizer(roads2_rule_stk_1))
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roads2_rule_1.symbols.append(mapnik.LineSymbolizer(roads2_rule_stk_1))
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roads2_style_1.rules.append(roads2_rule_1)
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m.append_style('road-border', roads2_style_1)
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roads2_style_2 = Style()
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roads2_rule_2 = Rule()
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roads2_rule_2.filter = Filter('[CLASS] = 2')
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roads2_rule_stk_2 = Stroke()
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roads2_rule_stk_2.color = Color(255,250,115)
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roads2_rule_stk_2.line_cap = line_cap.ROUND_CAP
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roads2_style_2 = mapnik.Style()
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roads2_rule_2 = mapnik.Rule()
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roads2_rule_2.filter = mapnik.Filter('[CLASS] = 2')
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roads2_rule_stk_2 = mapnik.Stroke()
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roads2_rule_stk_2.color = mapnik.Color(255,250,115)
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roads2_rule_stk_2.line_cap = mapnik.line_cap.ROUND_CAP
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roads2_rule_stk_2.width = 2.0
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roads2_rule_2.symbols.append(LineSymbolizer(roads2_rule_stk_2))
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roads2_rule_2.symbols.append(mapnik.LineSymbolizer(roads2_rule_stk_2))
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roads2_style_2.rules.append(roads2_rule_2)
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m.append_style('road-fill', roads2_style_2)
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@ -244,29 +244,29 @@ m.layers.append(roads2_lyr)
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# Roads 1 (The big orange ones, the highways)
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roads1_lyr = Layer('Roads')
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roads1_lyr = mapnik.Layer('Roads')
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roads1_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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roads1_lyr.datasource = roads34_lyr.datasource
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roads1_style_1 = Style()
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roads1_rule_1 = Rule()
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roads1_rule_1.filter = Filter('[CLASS] = 1')
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roads1_rule_stk_1 = Stroke()
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roads1_rule_stk_1.color = Color(188,149,28)
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roads1_rule_stk_1.line_cap = line_cap.ROUND_CAP
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roads1_style_1 = mapnik.Style()
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roads1_rule_1 = mapnik.Rule()
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roads1_rule_1.filter = mapnik.Filter('[CLASS] = 1')
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roads1_rule_stk_1 = mapnik.Stroke()
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roads1_rule_stk_1.color = mapnik.Color(188,149,28)
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roads1_rule_stk_1.line_cap = mapnik.line_cap.ROUND_CAP
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roads1_rule_stk_1.width = 7.0
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roads1_rule_1.symbols.append(LineSymbolizer(roads1_rule_stk_1))
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roads1_rule_1.symbols.append(mapnik.LineSymbolizer(roads1_rule_stk_1))
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roads1_style_1.rules.append(roads1_rule_1)
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m.append_style('highway-border', roads1_style_1)
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roads1_style_2 = Style()
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roads1_rule_2 = Rule()
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roads1_rule_2.filter = Filter('[CLASS] = 1')
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roads1_rule_stk_2 = Stroke()
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roads1_rule_stk_2.color = Color(242,191,36)
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roads1_rule_stk_2.line_cap = line_cap.ROUND_CAP
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roads1_style_2 = mapnik.Style()
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roads1_rule_2 = mapnik.Rule()
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roads1_rule_2.filter = mapnik.Filter('[CLASS] = 1')
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roads1_rule_stk_2 = mapnik.Stroke()
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roads1_rule_stk_2.color = mapnik.Color(242,191,36)
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roads1_rule_stk_2.line_cap = mapnik.line_cap.ROUND_CAP
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roads1_rule_stk_2.width = 5.0
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roads1_rule_2.symbols.append(LineSymbolizer(roads1_rule_stk_2))
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roads1_rule_2.symbols.append(mapnik.LineSymbolizer(roads1_rule_stk_2))
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roads1_style_2.rules.append(roads1_rule_2)
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m.append_style('highway-fill', roads1_style_2)
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@ -278,25 +278,25 @@ m.layers.append(roads1_lyr)
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# Populated Places
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popplaces_lyr = Layer('Populated Places')
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popplaces_lyr = mapnik.Layer('Populated Places')
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popplaces_lyr.srs = "+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 +datum=NAD83 +units=m +no_defs"
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popplaces_lyr.datasource = Shapefile(file='../data/popplaces',encoding='latin1')
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popplaces_lyr.datasource = mapnik.Shapefile(file='../data/popplaces',encoding='latin1')
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popplaces_style = Style()
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popplaces_rule = Rule()
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popplaces_style = mapnik.Style()
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popplaces_rule = mapnik.Rule()
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# And here we have a TextSymbolizer, used for labeling.
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# The first parameter is the name of the attribute to use as the source of the
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# text to label with. Then there is font size in points (I think?), and colour.
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popplaces_text_symbolizer = TextSymbolizer('GEONAME',
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popplaces_text_symbolizer = mapnik.TextSymbolizer('GEONAME',
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||||
'DejaVu Sans Book',
|
||||
10, Color('black'))
|
||||
10, mapnik.Color('black'))
|
||||
|
||||
# We set a "halo" around the text, which looks like an outline if thin enough,
|
||||
# or an outright background if large enough.
|
||||
popplaces_text_symbolizer.set_label_placement=label_placement.POINT_PLACEMENT
|
||||
popplaces_text_symbolizer.halo_fill = Color('white')
|
||||
popplaces_text_symbolizer.set_label_placement= mapnik.label_placement.POINT_PLACEMENT
|
||||
popplaces_text_symbolizer.halo_fill = mapnik.Color('white')
|
||||
popplaces_text_symbolizer.halo_radius = 1
|
||||
popplaces_text_symbolizer.avoid_edges = True
|
||||
popplaces_rule.symbols.append(popplaces_text_symbolizer)
|
||||
|
|
@ -310,11 +310,11 @@ m.layers.append(popplaces_lyr)
|
|||
# Draw map
|
||||
|
||||
# Set the initial extent of the map in 'master' spherical Mercator projection
|
||||
m.zoom_to_box(Envelope(-8024477.28459,5445190.38849,-7381388.20071,5662941.44855))
|
||||
m.zoom_to_box(mapnik.Envelope(-8024477.28459,5445190.38849,-7381388.20071,5662941.44855))
|
||||
|
||||
# Render two maps, two PNGs, one JPEG.
|
||||
im = Image(m.width,m.height)
|
||||
render(m, im)
|
||||
im = mapnik.Image(m.width,m.height)
|
||||
mapnik.render(m, im)
|
||||
|
||||
# Save image to files
|
||||
images = []
|
||||
|
|
@ -326,20 +326,29 @@ im.save('demo.jpg', 'jpeg')
|
|||
images.append('demo.jpg')
|
||||
|
||||
# Render cairo examples
|
||||
try:
|
||||
if mapnik.has_pycairo():
|
||||
|
||||
import cairo
|
||||
surface = cairo.SVGSurface('demo.svg', m.width,m.height)
|
||||
render(m, surface)
|
||||
svg_surface = cairo.SVGSurface('demo.svg', m.width,m.height)
|
||||
mapnik.render(m, svg_surface)
|
||||
svg_surface.finish()
|
||||
images.append('demo.svg')
|
||||
surface = cairo.PDFSurface('demo.pdf', m.width,m.height)
|
||||
render(m, surface)
|
||||
|
||||
pdf_surface = cairo.PDFSurface('demo.pdf', m.width,m.height)
|
||||
mapnik.render(m, pdf_surface)
|
||||
images.append('demo.pdf')
|
||||
except:
|
||||
print '\n\nSkipping cairo examples as Pycairo not available'
|
||||
pdf_surface.finish()
|
||||
|
||||
postscript_surface = cairo.PSSurface('demo.ps', m.width,m.height)
|
||||
mapnik.render(m, postscript_surface)
|
||||
images.append('demo.ps')
|
||||
postscript_surface.finish()
|
||||
else:
|
||||
print '\n\nSkipping cairo examples as Mapnik Pycairo support not available'
|
||||
|
||||
print "\n\n", len(images), "maps have been rendered in the current directory:"
|
||||
for image in images:
|
||||
print "-", image
|
||||
print "\n\nHave a look!\n\n"
|
||||
|
||||
save_map(m,"map.xml")
|
||||
mapnik.save_map(m,"map.xml")
|
||||
|
|
|
|||
55
tests/python_tests/cairo_test.py
Normal file
55
tests/python_tests/cairo_test.py
Normal file
|
|
@ -0,0 +1,55 @@
|
|||
#!/usr/bin/env python
|
||||
|
||||
import os
|
||||
import mapnik
|
||||
from nose.tools import *
|
||||
from utilities import execution_path,Todo
|
||||
|
||||
def setup():
|
||||
# All of the paths used are relative, if we run the tests
|
||||
# from another directory we need to chdir()
|
||||
os.chdir(execution_path('.'))
|
||||
|
||||
def _pycairo_surface(type,sym):
|
||||
if mapnik.has_pycairo():
|
||||
import cairo
|
||||
test_cairo_file = 'test.%s' % type
|
||||
m = mapnik.Map(256,256)
|
||||
mapnik.load_map(m,'../data/good_maps/%s_symbolizer.xml' % sym)
|
||||
surface = getattr(cairo,'%sSurface' % type.upper())(test_cairo_file, m.width,m.height)
|
||||
mapnik.render(m, surface)
|
||||
surface.finish()
|
||||
|
||||
if os.path.exists(test_cairo_file):
|
||||
os.remove(test_cairo_file)
|
||||
return True
|
||||
else:
|
||||
# Fail, the file wasn't written
|
||||
return False
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('svg','point')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('svg','building')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('svg','polygon')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('pdf','point')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('pdf','building')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('pdf','polygon')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('ps','point')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('ps','building')
|
||||
|
||||
def test_pycairo_svg_surface():
|
||||
return _pycairo_surface('ps','polygon')
|
||||
Loading…
Reference in a new issue