[core] Synchronize render passes and render tiles

Before this change render passes were assigned for the
whole layer at properties evaluation stage.

This caused problems, as layer render data are bound
to the tile and these data might differ from tile to
tile, depending on which tile has been updated by the
tile worker and which has not been yet updated.

This change takes into consideration the actual render
passes required for each tile and combines them for
the layer render passes. Naturally, this change also
introduces render pass check for each render layer in
`RenderLayer::render()` implementations.

13 files changed, 49 insertions, 22 deletions

diff --git a/include/mbgl/style/layer_properties.hpp b/include/mbgl/style/layer_properties.hpp
index c238faf02..024301f55 100644
--- a/include/mbgl/style/layer_properties.hpp
+++ b/include/mbgl/style/layer_properties.hpp
@@ -16,6 +16,8 @@ public:
     // Returns constants mask for the data-driven properties.
     virtual unsigned long constantsMask() const { return 0u; }
     Immutable<Layer::Impl> baseImpl;
+    // Contains render passes used by the renderer, see `mbgl::RenderPass`.
+    uint8_t renderPasses = 0u;
 
 protected:
     LayerProperties(Immutable<Layer::Impl> impl) : baseImpl(std::move(impl)) {}
diff --git a/src/mbgl/renderer/layers/render_background_layer.cpp b/src/mbgl/renderer/layers/render_background_layer.cpp
index db755adf0..885b6fe9b 100644
--- a/src/mbgl/renderer/layers/render_background_layer.cpp
+++ b/src/mbgl/renderer/layers/render_background_layer.cpp
@@ -39,6 +39,7 @@ void RenderBackgroundLayer::evaluate(const PropertyEvaluationParameters &paramet
 
     passes = properties->evaluated.get<style::BackgroundOpacity>() > 0 ? RenderPass::Translucent
                                                                        : RenderPass::None;
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -133,8 +134,8 @@ void RenderBackgroundLayer::render(PaintParameters& parameters) {
 }
 
 optional<Color> RenderBackgroundLayer::getSolidBackground() const {
-    const auto& evaluated = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).evaluated;
-    if (!evaluated.get<BackgroundPattern>().from.empty()) {
+    const auto& evaluated = getEvaluated<BackgroundLayerProperties>(evaluatedProperties);
+    if (!evaluated.get<BackgroundPattern>().from.empty() || evaluated.get<style::BackgroundOpacity>() <= 0.0f) {
         return nullopt;
     }
 
@@ -152,7 +153,7 @@ void addPatternIfNeeded(const std::string& id, const LayerPrepareParameters& par
 } // namespace
 
 void RenderBackgroundLayer::prepare(const LayerPrepareParameters& params) {
-    const auto& evaluated = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).evaluated;
+    const auto& evaluated = getEvaluated<BackgroundLayerProperties>(evaluatedProperties);
     if (!evaluated.get<BackgroundPattern>().to.empty()) {
         // Ensures that the pattern bitmap gets copied to atlas bitmap. 
         // Atlas bitmap is uploaded to atlas texture in upload.
diff --git a/src/mbgl/renderer/layers/render_circle_layer.cpp b/src/mbgl/renderer/layers/render_circle_layer.cpp
index 3888e9fec..cf5931930 100644
--- a/src/mbgl/renderer/layers/render_circle_layer.cpp
+++ b/src/mbgl/renderer/layers/render_circle_layer.cpp
@@ -41,6 +41,7 @@ void RenderCircleLayer::evaluate(const PropertyEvaluationParameters& parameters)
               && (evaluated.get<style::CircleOpacity>().constantOr(1) > 0 ||
                   evaluated.get<style::CircleStrokeOpacity>().constantOr(1) > 0))
              ? RenderPass::Translucent : RenderPass::None;
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -59,7 +60,7 @@ void RenderCircleLayer::render(PaintParameters& parameters) {
     }
 
     for (const RenderTile& tile : *renderTiles) {
-        const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+        const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
         if (!renderData) {
             continue;
         }
diff --git a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
index 5ad2e53a5..3c97ab743 100644
--- a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
@@ -44,6 +44,7 @@ void RenderFillExtrusionLayer::evaluate(const PropertyEvaluationParameters& para
     passes = (properties->evaluated.get<style::FillExtrusionOpacity>() > 0)
                  ? (RenderPass::Translucent | RenderPass::Pass3D)
                  : RenderPass::None;
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -67,7 +68,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
 
     const auto& evaluated = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).evaluated;
     const auto& crossfade = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).crossfade;
-    if (evaluated.get<FillExtrusionOpacity>() == 0) {
+    if (evaluatedProperties->renderPasses == mbgl::underlying_type(RenderPass::None)) {
         return;
     }
 
@@ -121,7 +122,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
         // Draw solid color extrusions
         auto drawTiles = [&](const gfx::StencilMode& stencilMode_, const gfx::ColorMode& colorMode_, const std::string& name) {
             for (const RenderTile& tile : *renderTiles) {
-                const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+                const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
                 if (!renderData) {
                     continue;
                 }
@@ -168,7 +169,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
         const auto fillPatternValue = evaluated.get<FillExtrusionPattern>().constantOr(mbgl::Faded<std::basic_string<char> >{"", ""});
         auto drawTiles = [&](const gfx::StencilMode& stencilMode_, const gfx::ColorMode& colorMode_, const std::string& name) {
             for (const RenderTile& tile : *renderTiles) {
-                const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+                const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
                 if (!renderData) {
                     continue;
                 }
diff --git a/src/mbgl/renderer/layers/render_fill_layer.cpp b/src/mbgl/renderer/layers/render_fill_layer.cpp
index c2bf14958..cf31201d7 100644
--- a/src/mbgl/renderer/layers/render_fill_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_layer.cpp
@@ -60,7 +60,7 @@ void RenderFillLayer::evaluate(const PropertyEvaluationParameters& parameters) {
     } else {
         passes |= RenderPass::Opaque;
     }
-
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -77,7 +77,7 @@ void RenderFillLayer::render(PaintParameters& parameters) {
     if (unevaluated.get<FillPattern>().isUndefined()) {
         parameters.renderTileClippingMasks(renderTiles);
         for (const RenderTile& tile : *renderTiles) {
-            const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+            const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
             if (!renderData) {
                 continue;
             }
@@ -163,7 +163,7 @@ void RenderFillLayer::render(PaintParameters& parameters) {
         parameters.renderTileClippingMasks(renderTiles);
 
         for (const RenderTile& tile : *renderTiles) {
-            const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+            const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
             if (!renderData) {
                 continue;
             }
diff --git a/src/mbgl/renderer/layers/render_heatmap_layer.cpp b/src/mbgl/renderer/layers/render_heatmap_layer.cpp
index e087d2ca6..478a8f8c4 100644
--- a/src/mbgl/renderer/layers/render_heatmap_layer.cpp
+++ b/src/mbgl/renderer/layers/render_heatmap_layer.cpp
@@ -43,7 +43,7 @@ void RenderHeatmapLayer::evaluate(const PropertyEvaluationParameters& parameters
     passes = (properties->evaluated.get<style::HeatmapOpacity>() > 0)
             ? (RenderPass::Translucent | RenderPass::Pass3D)
             : RenderPass::None;
-
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -95,7 +95,7 @@ void RenderHeatmapLayer::render(PaintParameters& parameters) {
             "heatmap texture", { *renderTexture, Color{ 0.0f, 0.0f, 0.0f, 1.0f }, {}, {} });
 
         for (const RenderTile& tile : *renderTiles) {
-            const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+            const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
             if (!renderData) {
                 continue;
             }
diff --git a/src/mbgl/renderer/layers/render_hillshade_layer.cpp b/src/mbgl/renderer/layers/render_hillshade_layer.cpp
index 9d1b5293c..2c7e0aef8 100644
--- a/src/mbgl/renderer/layers/render_hillshade_layer.cpp
+++ b/src/mbgl/renderer/layers/render_hillshade_layer.cpp
@@ -53,7 +53,7 @@ void RenderHillshadeLayer::evaluate(const PropertyEvaluationParameters& paramete
     passes = (properties->evaluated.get<style::HillshadeExaggeration >() > 0)
                  ? (RenderPass::Translucent | RenderPass::Pass3D)
                  : RenderPass::None;
-
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -66,7 +66,7 @@ bool RenderHillshadeLayer::hasCrossfade() const {
 }
 
 void RenderHillshadeLayer::prepare(const LayerPrepareParameters& params) {
-    RenderLayer::prepare(params);
+    renderTiles = params.source->getRenderTiles();
     maxzoom = params.source->getMaxZoom();
 }
 
diff --git a/src/mbgl/renderer/layers/render_line_layer.cpp b/src/mbgl/renderer/layers/render_line_layer.cpp
index 061be0aba..5c56826bd 100644
--- a/src/mbgl/renderer/layers/render_line_layer.cpp
+++ b/src/mbgl/renderer/layers/render_line_layer.cpp
@@ -48,6 +48,7 @@ void RenderLineLayer::evaluate(const PropertyEvaluationParameters& parameters) {
               && evaluated.get<style::LineColor>().constantOr(Color::black()).a > 0
               && evaluated.get<style::LineWidth>().constantOr(1.0) > 0)
              ? RenderPass::Translucent : RenderPass::None;
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -92,7 +93,7 @@ void RenderLineLayer::render(PaintParameters& parameters) {
     parameters.renderTileClippingMasks(renderTiles);
 
     for (const RenderTile& tile : *renderTiles) {
-        const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+        const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
         if (!renderData) {
             continue;
         }
diff --git a/src/mbgl/renderer/layers/render_raster_layer.cpp b/src/mbgl/renderer/layers/render_raster_layer.cpp
index ce1fa52f5..ecaee2985 100644
--- a/src/mbgl/renderer/layers/render_raster_layer.cpp
+++ b/src/mbgl/renderer/layers/render_raster_layer.cpp
@@ -34,6 +34,7 @@ void RenderRasterLayer::evaluate(const PropertyEvaluationParameters& parameters)
         staticImmutableCast<RasterLayer::Impl>(baseImpl),
         unevaluated.evaluate(parameters));
     passes = properties->evaluated.get<style::RasterOpacity>() > 0 ? RenderPass::Translucent : RenderPass::None;
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
diff --git a/src/mbgl/renderer/layers/render_symbol_layer.cpp b/src/mbgl/renderer/layers/render_symbol_layer.cpp
index b24e088ac..c79008d08 100644
--- a/src/mbgl/renderer/layers/render_symbol_layer.cpp
+++ b/src/mbgl/renderer/layers/render_symbol_layer.cpp
@@ -263,7 +263,7 @@ void RenderSymbolLayer::evaluate(const PropertyEvaluationParameters& parameters)
     passes = ((evaluated.get<style::IconOpacity>().constantOr(1) > 0 && hasIconOpacity && iconSize > 0)
               || (evaluated.get<style::TextOpacity>().constantOr(1) > 0 && hasTextOpacity && textSize > 0))
              ? RenderPass::Translucent : RenderPass::None;
-
+    properties->renderPasses = mbgl::underlying_type(passes);
     evaluatedProperties = std::move(properties);
 }
 
@@ -350,7 +350,7 @@ void RenderSymbolLayer::render(PaintParameters& parameters) {
     };
 
     for (const RenderTile& tile : *renderTiles) {
-        const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
+        const LayerRenderData* renderData = getRenderDataForPass(tile, parameters.pass);
         if (!renderData) {
             continue;
         }
@@ -495,7 +495,7 @@ style::TextPaintProperties::PossiblyEvaluated RenderSymbolLayer::textPaintProper
 
 void RenderSymbolLayer::prepare(const LayerPrepareParameters& params) {
     renderTiles = params.source->getRenderTilesSortedByYPosition();
-    assert(renderTiles);
+    addRenderPassesFromTiles();
 
     placementData.clear();
     for (const RenderTile& renderTile : *renderTiles) {
diff --git a/src/mbgl/renderer/render_layer.cpp b/src/mbgl/renderer/render_layer.cpp
index b92b28998..f15dc7e6f 100644
--- a/src/mbgl/renderer/render_layer.cpp
+++ b/src/mbgl/renderer/render_layer.cpp
@@ -48,7 +48,7 @@ bool RenderLayer::supportsZoom(float zoom) const {
 void RenderLayer::prepare(const LayerPrepareParameters& params) {
     assert(params.source);
     renderTiles = params.source->getRenderTiles();
-    assert(renderTiles);
+    addRenderPassesFromTiles();
 }
 
 optional<Color> RenderLayer::getSolidBackground() const {
@@ -86,5 +86,21 @@ void RenderLayer::checkRenderability(const PaintParameters& parameters,
     }
 }
 
+void RenderLayer::addRenderPassesFromTiles() {
+    assert(renderTiles);
+    for (const RenderTile& tile : *renderTiles) {
+        if (const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl)) {
+            passes |= RenderPass(renderData->layerProperties->renderPasses);
+        }
+    }
+}
+
+const LayerRenderData* RenderLayer::getRenderDataForPass(const RenderTile& tile, RenderPass pass) const {
+    if (const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl)) {
+        return bool(RenderPass(renderData->layerProperties->renderPasses) & pass) ? renderData : nullptr;
+    }
+    return nullptr;
+}
+
 } //namespace mbgl
 
diff --git a/src/mbgl/renderer/render_layer.hpp b/src/mbgl/renderer/render_layer.hpp
index fe8b7c652..75c729444 100644
--- a/src/mbgl/renderer/render_layer.hpp
+++ b/src/mbgl/renderer/render_layer.hpp
@@ -117,6 +117,10 @@ protected:
     // in the console to inform the developer.
     void checkRenderability(const PaintParameters&, uint32_t activeBindingCount);
 
+    void addRenderPassesFromTiles();
+
+    const LayerRenderData* getRenderDataForPass(const RenderTile&, RenderPass) const;
+
 protected:
     // Stores current set of tiles to be rendered for this layer.
     RenderTiles renderTiles;
diff --git a/src/mbgl/renderer/render_orchestrator.cpp b/src/mbgl/renderer/render_orchestrator.cpp
index cf5a7d190..303b778aa 100644
--- a/src/mbgl/renderer/render_orchestrator.cpp
+++ b/src/mbgl/renderer/render_orchestrator.cpp
@@ -292,14 +292,14 @@ std::unique_ptr<RenderTree> RenderOrchestrator::createRenderTree(const UpdatePar
             const Immutable<Layer::Impl>& layerImpl = *it;
             RenderLayer* layer = getRenderLayer(layerImpl->id);
             const auto* layerInfo = layerImpl->getTypeInfo();
-            const bool layerNeedsRendering = layer->needsRendering();
+            const bool layerIsVisible = layer->baseImpl->visibility != style::VisibilityType::None;
             const bool zoomFitsLayer = layer->supportsZoom(zoomHistory.lastZoom);
             renderTreeParameters->has3D |= (layerInfo->pass3d == LayerTypeInfo::Pass3D::Required);
 
             if (layerInfo->source != LayerTypeInfo::Source::NotRequired) {
                 if (layerImpl->source == sourceImpl->id) {
                     sourceNeedsRelayout = (sourceNeedsRelayout || hasImageDiff || constantsMaskChanged.count(layerImpl->id) || hasLayoutDifference(layerDiff, layerImpl->id));
-                    if (layerNeedsRendering) {
+                    if (layerIsVisible) {
                         filteredLayersForSource.push_back(layer->evaluatedProperties);
                         if (zoomFitsLayer) {
                             sourceNeedsRendering = true;
@@ -311,7 +311,7 @@ std::unique_ptr<RenderTree> RenderOrchestrator::createRenderTree(const UpdatePar
             } 
 
             // Handle layers without source.
-            if (layerNeedsRendering && zoomFitsLayer && sourceImpl.get() == sourceImpls->at(0).get()) {
+            if (layerIsVisible && zoomFitsLayer && sourceImpl.get() == sourceImpls->at(0).get()) {
                 if (backgroundLayerAsColor && layerImpl.get() == layerImpls->at(0).get()) {
                     const auto& solidBackground = layer->getSolidBackground();
                     if (solidBackground) {