Add tracing entry points in the rendering pipelineupstream/galinelle_mbgl_tracing

This also includes a default tracing implementation that does not require
hooking into a platform instrumentation, but simply stores timestamps
into an array that can be dumped into a json file.

Among possible use cases, dumping such metrics to file in CI to detect
regressions of specific stages of the pipeline.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
index af0bc788d0..df3bab4d92 100644
--- a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
@@ -16,6 +16,7 @@
 #include <mbgl/tile/tile.hpp>
 #include <mbgl/util/intersection_tests.hpp>
 #include <mbgl/util/math.hpp>
+#include <mbgl/perf/runtime_metrics.hpp>
 
 namespace mbgl {
 
@@ -71,7 +72,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
     if (parameters.pass != RenderPass::Translucent) {
         return;
     }
-
+    MBGL_TRACE_RENDERER_BEGIN(extrusion_layer);
     const auto& evaluated = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).evaluated;
     const auto& crossfade = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).crossfade;
     if (evaluatedProperties->renderPasses == mbgl::underlying_type(RenderPass::None)) {
@@ -224,6 +225,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
         // to prevent the second draw in cases where we have coincident polygons.
         drawTiles(parameters.stencilModeFor3D(), parameters.colorModeForRenderPass(), "color");
     }
+    MBGL_TRACE_RENDERER_END(extrusion_layer);
 }
 
 bool RenderFillExtrusionLayer::queryIntersectsFeature(const GeometryCoordinates& queryGeometry,