49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#include <mbgl/renderer/group_by_layout.hpp>
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#include <mbgl/renderer/render_layer.hpp>
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#include <mbgl/style/layer_impl.hpp>
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#include <mbgl/style/conversion/stringify.hpp>
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#include <mbgl/util/rapidjson.hpp>
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#include <rapidjson/writer.h>
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#include <rapidjson/stringbuffer.h>
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#include <unordered_map>
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namespace mbgl {
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std::string layoutKey(const RenderLayer& layer) {
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using namespace style::conversion;
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rapidjson::StringBuffer s;
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rapidjson::Writer<rapidjson::StringBuffer> writer(s);
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writer.StartArray();
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writer.Uint(static_cast<uint32_t>(layer.type));
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writer.String(layer.baseImpl.source);
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writer.String(layer.baseImpl.sourceLayer);
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writer.Double(layer.baseImpl.minZoom);
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writer.Double(layer.baseImpl.maxZoom);
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writer.Uint(static_cast<uint32_t>(layer.baseImpl.visibility));
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stringify(writer, layer.baseImpl.filter);
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layer.baseImpl.stringifyLayout(writer);
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writer.EndArray();
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return s.GetString();
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}
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std::vector<std::vector<const RenderLayer*>> groupByLayout(const std::vector<std::unique_ptr<RenderLayer>>& layers) {
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std::unordered_map<std::string, std::vector<const RenderLayer*>> map;
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for (auto& layer : layers) {
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map[layoutKey(*layer)].push_back(layer.get());
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}
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std::vector<std::vector<const RenderLayer*>> result;
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for (auto& pair : map) {
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result.push_back(pair.second);
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}
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return result;
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}
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} // namespace mbgl
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