drop suppoprt for svg output

src/c3nav/mapdata/render/engines/base.py

@@ -48,7 +48,7 @@ class RenderEngine(ABC):
         self.background_rgb = tuple(int(background[i:i + 2], 16)/255 for i in range(1, 6, 2))
 
     @abstractmethod
-    def get_png(self) -> bytes:
+    def render(self) -> bytes:
         # render the image to png.
         pass
 

src/c3nav/mapdata/render/engines/opengl.py

@@ -173,7 +173,7 @@ class OpenGLEngine(Base3DEngine):
 
     worker = OpenGLWorker()
 
-    def get_png(self) -> bytes:
+    def render(self) -> bytes:
         return self.worker.render(self.width, self.height, self.background_rgb,
                                   np.hstack(self.vertices).astype(np.float32).tobytes() if self.vertices else b'')
 

src/c3nav/mapdata/render/engines/svg.py

@@ -81,7 +81,7 @@ class SVGEngine(RenderEngine):
         result += '</svg>'
         return result
 
-    def get_png(self):
+    def render(self):
         # render the image to png. returns bytes if f is None, otherwise it calls f.write()
 
         if self.width == 256 and self.height == 256 and not self.g: