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abort rendering early if the style is disabled

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refs #184
This commit is contained in:
Konstantin Käfer
2014-05-13 15:15:54 +02:00
parent 72c0410a4d
commit b096373b71
3 changed files with 25 additions and 0 deletions
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22
src/map/map.cpp
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@@ -484,6 +484,16 @@ void Map::renderLayers(const std::vector<LayerDescription>& layers, RenderPass p
}
}
template <typename Styles>
bool is_invisible(const Styles &styles, const LayerDescription &layer_desc) {
auto it = styles.find(layer_desc.name);
if (it == styles.end()) return true;
const auto &properties = it->second;
if (!properties.enabled) return true;
if (properties.opacity <= 0) return true;
return false;
}
void Map::renderLayer(const LayerDescription& layer_desc, RenderPass pass) {
if (layer_desc.child_layer.size()) {
gl::group group(std::string("group: ") + layer_desc.name);
@@ -501,13 +511,25 @@ void Map::renderLayer(const LayerDescription& layer_desc, RenderPass pass) {
// Abort early if we can already deduce from the bucket type that
// we're not going to render anything anyway during this pass.
switch (bucket_desc.type) {
case BucketType::Fill:
if (is_invisible(style.computed.fills, layer_desc)) return;
break;
case BucketType::Line:
if (pass == Opaque) return;
if (is_invisible(style.computed.lines, layer_desc)) return;
break;
case BucketType::Point:
if (pass == Opaque) return;
if (is_invisible(style.computed.points, layer_desc)) return;
break;
case BucketType::Text:
if (pass == Opaque) return;
if (is_invisible(style.computed.texts, layer_desc)) return;
break;
case BucketType::Raster:
if (pass == Translucent) return;
if (is_invisible(style.computed.lines, layer_desc)) return;
break;
default:
break;
}