Improve gltfpack code coverage further

We haven't really used scan=true in a while and it's not a very
interesting mode anyway, so debugMeshlets doesn't need it.

Also add a few more gltfpack options to coverage build; -tl just tests
option parsing but we were missing some actual processing code paths due
to lack of keep flags.

.github/workflows/build.yml

@@ -172,10 +172,11 @@ jobs:
           ./gltfpack -test demo/pirate.obj -vp 16 -vt 16 -vn 16 -vc 16
           ./gltfpack -test demo/pirate.obj -vpf -vtf -vnf
           ./gltfpack -test glTF-Sample-Assets/Models/ABeautifulGame/glTF/ABeautifulGame.gltf -mi -c
+          ./gltfpack -test glTF-Sample-Assets/Models/ABeautifulGame/glTF/ABeautifulGame.gltf -kn -km -ke
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -vpf -vtf -c
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -vpf -vtf -cc
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc
-          ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc -tq color 10 -tu normal,attrib -ts attrib 0.5
+          ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc -tq color 10 -tu normal,attrib -ts attrib 0.5 -tl color 512
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tr
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc -ts 0.5 -tl 64
           ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc color -tfy -tq 4 -tj 1

gltf/gltfpack.cpp

@@ -421,7 +421,7 @@ static void process(cgltf_data* data, const char* input_path, const char* output
 		if (settings.meshlet_debug > 0)
 		{
 			Mesh meshlets = {};
-			debugMeshlets(mesh, meshlets, settings.meshlet_debug, /* scan= */ false);
+			debugMeshlets(mesh, meshlets, settings.meshlet_debug);
 			debug_meshes.push_back(meshlets);
 		}
 	}

gltf/gltfpack.h

@@ -312,7 +312,7 @@ void processAnimation(Animation& animation, const Settings& settings);
 void processMesh(Mesh& mesh, const Settings& settings);
 
 void debugSimplify(const Mesh& mesh, Mesh& kinds, Mesh& loops, float ratio, float error, bool attributes, bool quantize_tbn);
-void debugMeshlets(const Mesh& mesh, Mesh& meshlets, int max_vertices, bool scan);
+void debugMeshlets(const Mesh& mesh, Mesh& meshlets, int max_vertices);
 
 bool compareMeshTargets(const Mesh& lhs, const Mesh& rhs);
 bool compareMeshVariants(const Mesh& lhs, const Mesh& rhs);

gltf/mesh.cpp

@@ -1114,16 +1114,13 @@ void debugSimplify(const Mesh& source, Mesh& kinds, Mesh& loops, float ratio, fl
 	loops.streams.push_back(colors);
 }
 
-void debugMeshlets(const Mesh& source, Mesh& meshlets, int max_vertices, bool scan)
+void debugMeshlets(const Mesh& source, Mesh& meshlets, int max_vertices)
 {
 	Mesh mesh = source;
 	assert(mesh.type == cgltf_primitive_type_triangles);
 
 	reindexMesh(mesh, /* quantize_tbn= */ true);
 
-	if (scan)
-		optimizeMesh(mesh, false);
-
 	const Stream* positions = getStream(mesh, cgltf_attribute_type_position);
 	assert(positions);
 
@@ -1135,11 +1132,7 @@ void debugMeshlets(const Mesh& source, Mesh& meshlets, int max_vertices, bool sc
 	std::vector<meshopt_Meshlet> ml(max_meshlets);
 	std::vector<unsigned int> mlv(max_meshlets * max_vertices);
 	std::vector<unsigned char> mlt(max_meshlets * max_triangles * 3);
-
-	if (scan)
-		ml.resize(meshopt_buildMeshletsScan(&ml[0], &mlv[0], &mlt[0], &mesh.indices[0], mesh.indices.size(), positions->data.size(), max_vertices, max_triangles));
-	else
-		ml.resize(meshopt_buildMeshlets(&ml[0], &mlv[0], &mlt[0], &mesh.indices[0], mesh.indices.size(), positions->data[0].f, positions->data.size(), sizeof(Attr), max_vertices, max_triangles, cone_weight));
+	ml.resize(meshopt_buildMeshlets(&ml[0], &mlv[0], &mlt[0], &mesh.indices[0], mesh.indices.size(), positions->data[0].f, positions->data.size(), sizeof(Attr), max_vertices, max_triangles, cone_weight));
 
 	// generate meshlet meshes, using unique colors
 	meshlets.nodes = mesh.nodes;