1 files changed, 63 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_tile.cpp b/src/mbgl/renderer/render_tile.cpp
index 7e7e3e6d23..e28606633a 100644
--- a/src/mbgl/renderer/render_tile.cpp
+++ b/src/mbgl/renderer/render_tile.cpp
@@ -1,5 +1,7 @@
 #include <mbgl/renderer/render_tile.hpp>
 #include <mbgl/renderer/painter.hpp>
+#include <mbgl/renderer/buckets/debug_bucket.hpp>
+#include <mbgl/programs/programs.hpp>
 #include <mbgl/map/transform_state.hpp>
 #include <mbgl/tile/tile.hpp>
 #include <mbgl/util/math.hpp>
@@ -60,4 +62,65 @@ void RenderTile::startRender(Painter& painter) {
     matrix::multiply(nearClippedMatrix, painter.nearClippedProjMatrix, nearClippedMatrix);
 }
 
+void RenderTile::finishRender(Painter& painter) {
+    if (!used || painter.frame.debugOptions == MapDebugOptions::NoDebug)
+        return;
+
+    static const style::Properties<>::PossiblyEvaluated properties {};
+    static const DebugProgram::PaintPropertyBinders paintAttibuteData(properties, 0);
+
+    auto draw = [&] (Color color, const auto& vertexBuffer, const auto& indexBuffer, const auto& segments, auto drawMode) {
+        painter.programs->debug.draw(
+            painter.context,
+            drawMode,
+            gl::DepthMode::disabled(),
+            painter.stencilModeForClipping(clip),
+            gl::ColorMode::unblended(),
+            DebugProgram::UniformValues {
+                uniforms::u_matrix::Value{ matrix },
+                uniforms::u_color::Value{ color }
+            },
+            vertexBuffer,
+            indexBuffer,
+            segments,
+            paintAttibuteData,
+            properties,
+            painter.state.getZoom(),
+            "debug"
+        );
+    };
+
+    if (painter.frame.debugOptions & (MapDebugOptions::Timestamps | MapDebugOptions::ParseStatus)) {
+        if (!tile.debugBucket || tile.debugBucket->renderable != tile.isRenderable() ||
+            tile.debugBucket->complete != tile.isComplete() ||
+            !(tile.debugBucket->modified == tile.modified) ||
+            !(tile.debugBucket->expires == tile.expires) ||
+            tile.debugBucket->debugMode != painter.frame.debugOptions) {
+            tile.debugBucket = std::make_unique<DebugBucket>(
+                tile.id, tile.isRenderable(), tile.isComplete(), tile.modified,
+                tile.expires, painter.frame.debugOptions, painter.context);
+        }
+
+        draw(Color::white(),
+             *tile.debugBucket->vertexBuffer,
+             *tile.debugBucket->indexBuffer,
+             tile.debugBucket->segments,
+             gl::Lines { 4.0f * painter.frame.pixelRatio });
+
+        draw(Color::black(),
+             *tile.debugBucket->vertexBuffer,
+             *tile.debugBucket->indexBuffer,
+             tile.debugBucket->segments,
+             gl::Lines { 2.0f * painter.frame.pixelRatio });
+    }
+
+    if (painter.frame.debugOptions & MapDebugOptions::TileBorders) {
+        draw(Color::red(),
+             painter.tileVertexBuffer,
+             painter.tileBorderIndexBuffer,
+             painter.tileBorderSegments,
+             gl::LineStrip { 4.0f * painter.frame.pixelRatio });
+    }
+}
+
 } // namespace mbgl