Fix layers rendering after fill-extrusion

This fixes following issues:
* Fix some false passing combinations/fill-extrusion-translucent--XXXX tests
* Fix and enable other, failing but ignored, combinations/fill-extrusion-translucent--XXXX tests
* Fix rendering of layers that are on top of fill-extrusion layers

state.getProjMatrix(nearClippedProjMatrix, 100) caused that tests with size 64x64 were not
rendering fill extrusions: far plane calculated as 96.9 and near plane set to 100 was the cause.
near plane is changed from hardcoded 100 to depend on state.getCameraToCenterDistance() - producing
similar value but one that follows max zoom.

This caused that e.g. combinations/fill-extrusion-translucent--fill-opaque was falsely passing as
only fill-opaque layer got rendered.

combinations/fill-extrusion-translucent--XXXX tests expose regression https://github.com/mapbox/mapbox-gl-native/issues/14844#issuecomment-503600034 in #14844, #14779.

Fix (opaquePassCutoff, is3D) is ported from https://github.com/mapbox/mapbox-gl-js/pull/7821

Fixes: #14844, #14779, #15039

1 files changed, 4 insertions, 5 deletions

diff --git a/src/mbgl/renderer/layers/render_fill_layer.cpp b/src/mbgl/renderer/layers/render_fill_layer.cpp
index 6a3c247fbb..c2bf149582 100644
--- a/src/mbgl/renderer/layers/render_fill_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_layer.cpp
@@ -130,11 +130,10 @@ 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