[core][cp] Backport #15065 to oolong

platform/node/test/ignores.json

@@ -88,25 +88,7 @@
   "render-tests/text-rotate/with-offset": "https://github.com/mapbox/mapbox-gl-native/issues/11872",
   "render-tests/video/default": "skip - https://github.com/mapbox/mapbox-gl-native/issues/601",
   "render-tests/background-color/colorSpace-hcl": "needs issue",
-  "render-tests/combinations/fill-extrusion-translucent--heatmap-translucent": "needs investigation",
   "render-tests/combinations/heatmap-translucent--background-opaque": "needs investigation",
-  "render-tests/combinations/heatmap-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/background-opaque--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/background-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/circle-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--background-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--circle-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--hillshade-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--fill-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--line-translucent": "needs investigation",
-  "render-tests/combinations/fill-extrusion-translucent--symbol-translucent": "needs investigation",
-  "render-tests/combinations/hillshade-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/fill-opaque--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/fill-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/line-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/raster-translucent--fill-extrusion-translucent": "needs investigation",
-  "render-tests/combinations/symbol-translucent--fill-extrusion-translucent": "needs investigation",
   "render-tests/feature-state/composite-expression": "https://github.com/mapbox/mapbox-gl-native/issues/12613",
   "render-tests/feature-state/data-expression": "https://github.com/mapbox/mapbox-gl-native/issues/12613",
   "render-tests/feature-state/vector-source": "https://github.com/mapbox/mapbox-gl-native/issues/12613",

src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp

@@ -56,6 +56,10 @@ bool RenderFillExtrusionLayer::hasCrossfade() const {
     return getCrossfade<FillExtrusionLayerProperties>(evaluatedProperties).t != 1;
 }
 
+bool RenderFillExtrusionLayer::is3D() const {
+    return true;
+}
+
 void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
     if (parameters.pass != RenderPass::Translucent) {
         return;

src/mbgl/renderer/layers/render_fill_extrusion_layer.hpp

@@ -17,6 +17,7 @@ class RenderFillExtrusionLayer final : public RenderLayer {
     void evaluate(const PropertyEvaluationParameters&) override;
     bool hasTransition() const override;
     bool hasCrossfade() const override;
+    bool is3D() const override;
     void render(PaintParameters&) override;
 
     bool queryIntersectsFeature(

src/mbgl/renderer/layers/render_fill_layer.cpp

@@ -129,11 +129,10 @@ void RenderFillLayer::render(PaintParameters& parameters) {
                 );
             };
 
-            // Only draw the fill when it's opaque and we're drawing opaque fragments,
-            // or when it's translucent and we're drawing translucent fragments.
-            if (bucket.triangleIndexBuffer &&
-              (evaluated.get<FillColor>().constantOr(Color()).a >= 1.0f &&
-               evaluated.get<FillOpacity>().constantOr(0) >= 1.0f) == (parameters.pass == RenderPass::Opaque)) {
+            auto fillRenderPass = (evaluated.get<FillColor>().constantOr(Color()).a >= 1.0f
+                && evaluated.get<FillOpacity>().constantOr(0) >= 1.0f
+                && parameters.currentLayer >= parameters.opaquePassCutoff) ? RenderPass::Opaque : RenderPass::Translucent;
+            if (bucket.triangleIndexBuffer && parameters.pass == fillRenderPass) {
                 draw(parameters.programs.getFillLayerPrograms().fill,
                      gfx::Triangles(),
                      parameters.depthModeForSublayer(1, parameters.pass == RenderPass::Opaque

src/mbgl/renderer/paint_parameters.cpp

@@ -19,10 +19,11 @@ TransformParameters::TransformParameters(const TransformState& state_)
     // odd viewport sizes.
     state.getProjMatrix(alignedProjMatrix, 1, true);
 
-    // Calculate a second projection matrix with the near plane clipped to 100 so as
-    // not to waste lots of depth buffer precision on very close empty space, for layer
-    // types (fill-extrusion) that use the depth buffer to emulate real-world space.
-    state.getProjMatrix(nearClippedProjMatrix, 100);
+    // Calculate a second projection matrix with the near plane moved further,
+    // to a tenth of the far value, so as not to waste depth buffer precision on
+    // very close empty space, for layer types (fill-extrusion) that use the
+    // depth buffer to emulate real-world space.
+    state.getProjMatrix(nearClippedProjMatrix, 0.1 * state.getCameraToCenterDistance());
 }
 
 PaintParameters::PaintParameters(gfx::Context& context_,
@@ -70,6 +71,9 @@ mat4 PaintParameters::matrixForTile(const UnwrappedTileID& tileID, bool aligned)
 }
 
 gfx::DepthMode PaintParameters::depthModeForSublayer(uint8_t n, gfx::DepthMaskType mask) const {
+    if (currentLayer < opaquePassCutoff) {
+        return gfx::DepthMode::disabled();
+    }
     float depth = depthRangeSize + ((1 + currentLayer) * numSublayers + n) * depthEpsilon;
     return gfx::DepthMode { gfx::DepthFunctionType::LessEqual, mask, { depth, depth } };
 }

src/mbgl/renderer/paint_parameters.hpp

@@ -102,8 +102,7 @@ class PaintParameters {
     uint32_t currentLayer;
     float depthRangeSize;
     const float depthEpsilon = 1.0f / (1 << 16);
-
-
+    uint32_t opaquePassCutoff = 0;
     float symbolFadeChange;
 };
 

src/mbgl/renderer/render_layer.hpp

@@ -66,6 +66,9 @@ class RenderLayer {
     // Returns true is the layer is subject to placement.
     bool needsPlacement() const;
 
+    // Returns true if layer writes to depth buffer by drawing using PaintParameters::depthModeFor3D().
+    virtual bool is3D() const { return false; }
+
     const std::string& getID() const;
 
     // Checks whether this layer needs to be rendered in the given render pass.

src/mbgl/renderer/render_tile.cpp

@@ -121,7 +121,7 @@ void RenderTile::prepare(const SourcePrepareParameters& parameters) {
     }
 
     // Calculate two matrices for this tile: matrix is the standard tile matrix; nearClippedMatrix
-    // clips the near plane to 100 to save depth buffer precision
+    // has near plane moved further, to enhance depth buffer precision
     const auto& transform = parameters.transform;
     transform.state.matrixFor(matrix, id);
     transform.state.matrixFor(nearClippedMatrix, id);

src/mbgl/renderer/renderer_impl.cpp

@@ -391,8 +391,15 @@ void Renderer::Impl::render(const UpdateParameters& updateParameters) {
             *lineAtlas,
         };
 
+        auto opaquePassCutoffEstimation = renderItems.size();
         for (auto& renderItem : renderItems) {
             RenderLayer& renderLayer = renderItem.layer;
+            if (parameters.opaquePassCutoff == 0) {
+                --opaquePassCutoffEstimation;
+                if (renderLayer.is3D()) {
+                    parameters.opaquePassCutoff = uint32_t(opaquePassCutoffEstimation);
+                }
+            }
             if (renderLayer.hasRenderPass(RenderPass::Upload)) {
                 renderLayer.upload(*uploadPass, uploadParameters);
             }