add debug warnings

include/llmr/util/constants.hpp

@@ -19,6 +19,11 @@ extern const bool styleParseWarnings;
 extern const bool spriteWarnings;
 extern const bool renderWarnings;
 extern const bool renderTree;
+extern const bool labelTextMissingWarning;
+extern const bool missingFontStackWarning;
+extern const bool missingFontFaceWarning;
+extern const bool glyphWarning;
+extern const bool shapingWarning;
 
 }
 

src/map/tile_parser.cpp

@@ -163,9 +163,11 @@ std::unique_ptr<Bucket> TileParser::createIconBucket(const VectorTileLayer& laye
 }
 
 std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& layer, const BucketDescription& bucket_desc) {
-
     // Determine the correct text stack.
     if (!layer.shaping.size()) {
+        if (debug::missingFontStackWarning) {
+            fprintf(stderr, "[WARNING] missing font stack '%s'\n", bucket_desc.geometry.font.c_str());
+        }
         return nullptr;
     }
 
@@ -179,6 +181,9 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& laye
         auto it = const_faces.find(face);
         if (it == const_faces.end()) {
             // This layer references an unknown face.
+            if (debug::missingFontFaceWarning) {
+                fprintf(stderr, "[WARNING] missing font face '%s'\n", face.c_str());
+            }
             return nullptr;
         }
         faces.push_back(&it->second);

src/renderer/text_bucket.cpp

@@ -7,6 +7,7 @@
 #include <llmr/style/style.hpp>
 #include <llmr/map/vector_tile.hpp>
 #include <llmr/text/placement.hpp>
+#include <llmr/util/constants.hpp>
 
 #include <llmr/util/math.hpp>
 #include <llmr/platform/gl.hpp>
@@ -103,12 +104,18 @@ void TextBucket::addFeature(const VectorTileFeature &feature,
     auto it_prop = feature.properties.find(geom_desc.field);
     if (it_prop == feature.properties.end()) {
         // feature does not have the correct property
+        if (debug::labelTextMissingWarning) {
+            fprintf(stderr, "[WARNING] feature doesn't have property '%s' required for labelling\n", geom_desc.field.c_str());
+        }
         return;
     }
     const Value &value = it_prop->second;
 
     auto it_shaping = shapings.find(value);
     if (it_shaping == shapings.end()) {
+        if (debug::shapingWarning) {
+            fprintf(stderr, "[WARNING] missing shaping for '%s'\n", toString(value).c_str());
+        }
         // we lack shaping information for this label
         return;
     }

src/util/constants.cpp

@@ -7,3 +7,8 @@ const bool llmr::debug::styleParseWarnings = false;
 const bool llmr::debug::spriteWarnings = false;
 const bool llmr::debug::renderWarnings = false;
 const bool llmr::debug::renderTree = false;
+const bool llmr::debug::labelTextMissingWarning = true;
+const bool llmr::debug::missingFontStackWarning = true;
+const bool llmr::debug::missingFontFaceWarning = true;
+const bool llmr::debug::glyphWarning = true;
+const bool llmr::debug::shapingWarning = true;