Make v3.x.x the minimum required Mapnik version (openstreetmap#365)

Remove support for Mapnik versions < [3.0.0](https://mapnik.org/news/release-3.0.0), which have been around since 2015

CMakeLists.txt

@@ -43,11 +43,11 @@ find_package(CAIRO REQUIRED)
 find_package(GLIB REQUIRED)
 find_package(HTTPD REQUIRED)
 find_package(INIPARSER REQUIRED)
-find_package(LIBMAPNIK REQUIRED)
+find_package(LIBMAPNIK 3 REQUIRED)
 find_package(LIBMEMCACHED)
 find_package(LIBRADOS)
 
-if(LIBMAPNIK_VERSION STRGREATER_EQUAL "4")
+if(LIBMAPNIK_VERSION VERSION_GREATER_EQUAL 4)
   set(CMAKE_CXX_STANDARD 14)
 endif()
 
@@ -111,7 +111,7 @@ execute_process(COMMAND ${APXS_EXECUTABLE} -q sysconfdir
   OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
-if(LIBMAPNIK_VERSION STRLESS "4")
+if(LIBMAPNIK_VERSION VERSION_LESS 4)
   find_program(MAPNIK_CONFIG_EXECUTABLE NAMES mapnik-config REQUIRED)
   execute_process(COMMAND ${MAPNIK_CONFIG_EXECUTABLE} --fonts
     OUTPUT_STRIP_TRAILING_WHITESPACE
@@ -121,7 +121,7 @@ if(LIBMAPNIK_VERSION STRLESS "4")
     OUTPUT_STRIP_TRAILING_WHITESPACE
     OUTPUT_VARIABLE MAPNIK_PLUGINS_DIR
   )
-elseif(LIBMAPNIK_VERSION STRGREATER_EQUAL "4")
+elseif(LIBMAPNIK_VERSION VERSION_GREATER_EQUAL 4)
   pkg_get_variable(MAPNIK_FONTS_DIR libmapnik fonts_dir)
   pkg_get_variable(MAPNIK_PLUGINS_DIR libmapnik plugins_dir)
 endif()

src/gen_tile.cpp

@@ -53,27 +53,15 @@
 #include <netdb.h>
 #endif
 
-#if MAPNIK_VERSION >= 300000
 #define image_data_32 image_rgba8
 #define image_32 image_rgba8
 #include <mapnik/image.hpp>
 #include <mapnik/image_view_any.hpp>
-#else
-#include <mapnik/graphics.hpp>
-#if MAPNIK_VERSION < 200000
-#include <mapnik/envelope.hpp>
-#define image_32 Image32
-#define image_data_32 ImageData32
-#define box2d Envelope
-#define zoom_to_box zoomToBox
-#else
 #if MAPNIK_VERSION >= 400000
 #include <mapnik/geometry/box2d.hpp>
 #else
 #include <mapnik/box2d.hpp>
 #endif
-#endif
-#endif
 
 
 using namespace mapnik;
@@ -222,23 +210,15 @@ static void parameterize_map_max_connections(Map &m, int num_threads)
 	char * tmp = (char *)malloc(20);
 
 	for (i = 0; i < m.layer_count(); i++) {
-#if MAPNIK_VERSION >= 300000
 		layer& l = m.get_layer(i);
-#else
-		layer& l = m.getLayer(i);
-#endif
 		parameters params = l.datasource()->params();
 
 		if (params.find("max_size") == params.end()) {
 			sprintf(tmp, "%i", num_threads + 2);
 			params["max_size"] = std::string(tmp);
 		}
 
-#if MAPNIK_VERSION >= 200200
 		l.set_datasource(datasource_cache::instance().create(params));
-#else
-		l.set_datasource(datasource_cache::instance()->create(params));
-#endif
 	}
 
 	free(tmp);
@@ -324,12 +304,8 @@ static enum protoCmd render(struct xmlmapconfig * map, int x, int y, int z, char
 
 	for (yy = 0; yy < render_size_ty; yy++) {
 		for (xx = 0; xx < render_size_tx; xx++) {
-#if MAPNIK_VERSION >= 300000
 			mapnik::image_view<mapnik::image<mapnik::rgba8_t>> vw1(xx * map->tilesize, yy * map->tilesize, map->tilesize, map->tilesize, buf);
 			struct mapnik::image_view_any vw(vw1);
-#else
-			mapnik::image_view<mapnik::image_data_32> vw(xx * map->tilesize, yy * map->tilesize, map->tilesize, map->tilesize, buf.data());
-#endif
 			tiles.set(xx, yy, save_to_string(vw, map->output_format));
 		}
 	}
@@ -386,12 +362,7 @@ static enum protoCmd render(Map &m, const char *tile_dir, char *xmlname, project
 void render_init(const char *plugins_dir, const char* font_dir, int font_dir_recurse)
 {
 	g_logger(G_LOG_LEVEL_INFO, "Renderd is using mapnik version %i.%i.%i", ((MAPNIK_VERSION) / 100000), (((MAPNIK_VERSION) / 100) % 1000), ((MAPNIK_VERSION) % 100));
-
-#if MAPNIK_VERSION >= 200200
 	mapnik::datasource_cache::instance().register_datasources(plugins_dir);
-#else
-	mapnik::datasource_cache::instance()->register_datasources(plugins_dir);
-#endif
 	load_fonts(font_dir, font_dir_recurse);
 }
 

src/gen_tile_test.cpp

@@ -47,19 +47,12 @@
 #endif
 
 #include <mapnik/version.hpp>
-#if MAPNIK_VERSION < 200000
-#include <mapnik/envelope.hpp>
-#define image_32 Image32
-#define image_data_32 ImageData32
-#define box2d Envelope
-#define zoom_to_box zoomToBox
-#else
+
 #if MAPNIK_VERSION >= 400000
 #include <mapnik/geometry/box2d.hpp>
 #else
 #include <mapnik/box2d.hpp>
 #endif
-#endif
 
 
 #define NO_QUEUE_REQUESTS 9

src/parameterize_style.cpp

@@ -64,11 +64,7 @@ static void parameterize_map_language(mapnik::Map &m, char * parameter)
 	strncat(name_replace, ") as name", 255);
 
 	for (i = 0; i < m.layer_count(); i++) {
-#if MAPNIK_VERSION >= 300000
 		mapnik::layer& l = m.get_layer(i);
-#else
-		mapnik::layer& l = m.getLayer(i);
-#endif
 		mapnik::parameters params = l.datasource()->params();
 
 		if (params.find("table") != params.end()) {
@@ -79,11 +75,7 @@ static void parameterize_map_language(mapnik::Map &m, char * parameter)
 				size_t pos = str.find(",name");
 				str.replace(pos, 5, name_replace);
 				params["table"] = str;
-#if MAPNIK_VERSION >= 200200
 				l.set_datasource(mapnik::datasource_cache::instance().create(params));
-#else
-				l.set_datasource(mapnik::datasource_cache::instance()->create(params));
-#endif
 			}
 		}