Fix VoxelStreamBlockFiles always showing a warning about channels

doc/source/changelog.md

@@ -44,6 +44,7 @@ Ongoing development - `master`
     - `VoxelInstancer`: fixed no instances generated when density is 1 in vertex emission mode 
     - `VoxelTerrain`: fixed materials shown under the wrong inspector category
     - `VoxelStreamRegionFiles`: fixed errors caused by meta file being sometimes written with wrong depth values
+    - `VoxelStreamBlockFiles`: fixed warning about channels always shown in the scene tree
     - Fix some crashes occurring when all PoolVector allocs are in use (Godot 3.x limitation), it will print errors instead
 
 

streams/voxel_stream_block_files.cpp

@@ -26,7 +26,6 @@ VoxelStreamBlockFiles::VoxelStreamBlockFiles() {
 
 VoxelStream::Result VoxelStreamBlockFiles::emerge_block(
 		Ref<VoxelBuffer> out_buffer, Vector3i origin_in_voxels, int lod) {
-
 	ERR_FAIL_COND_V(out_buffer.is_null(), RESULT_ERROR);
 
 	if (_directory_path.empty()) {
@@ -158,6 +157,11 @@ void VoxelStreamBlockFiles::immerge_block(Ref<VoxelBuffer> buffer, Vector3i orig
 	}
 }
 
+int VoxelStreamBlockFiles::get_used_channels_mask() const {
+	// Assuming all, since that stream can store anything.
+	return VoxelBuffer::ALL_CHANNELS_MASK;
+}
+
 String VoxelStreamBlockFiles::get_directory() const {
 	return _directory_path;
 }

streams/voxel_stream_block_files.h

@@ -18,6 +18,8 @@ public:
 	Result emerge_block(Ref<VoxelBuffer> out_buffer, Vector3i origin_in_voxels, int lod) override;
 	void immerge_block(Ref<VoxelBuffer> buffer, Vector3i origin_in_voxels, int lod) override;
 
+	int get_used_channels_mask() const override;
+
 	String get_directory() const;
 	void set_directory(String dirpath);