disable mip-mapping for canvas texture

src/assets/assetload_funcs.cpp

@@ -165,7 +165,7 @@ assetload::postfunc assetload::font(
                 textures.emplace_back(nullptr);
             } else {
                 auto texture = Texture::from(page.get());
-                texture->setMipMapping(false);
+                texture->setMipMapping(false, true);
                 textures.emplace_back(std::move(texture));
             }
         }