Add half precision floating point support to `StreamPeer`

Closes godotengine/godot-proposals#5983

Adds put/get methods to `StreamPeer` that handles half precision
floating point values.
Adds endode/decode half precision floating point to `marshalls`.
Adds `get_half` and `store_half` to `FileAccess`

Co-Authored-By: "Alfonso J. Ramos" <theraot@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/core/io/file_access.cpp b/core/io/file_access.cpp
index d8bf645a7d..01b189f5f2 100644
--- a/core/io/file_access.cpp
+++ b/core/io/file_access.cpp
@@ -263,6 +263,10 @@ uint64_t FileAccess::get_64() const {
 	return data;
 }
 
+float FileAccess::get_half() const {
+	return Math::half_to_float(get_16());
+}
+
 float FileAccess::get_float() const {
 	MarshallFloat m;
 	m.i = get_32();
@@ -522,6 +526,10 @@ void FileAccess::store_real(real_t p_real) {
 	}
 }
 
+void FileAccess::store_half(float p_dest) {
+	store_16(Math::make_half_float(p_dest));
+}
+
 void FileAccess::store_float(float p_dest) {
 	MarshallFloat m;
 	m.f = p_dest;
@@ -828,6 +836,7 @@ void FileAccess::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_16"), &FileAccess::get_16);
 	ClassDB::bind_method(D_METHOD("get_32"), &FileAccess::get_32);
 	ClassDB::bind_method(D_METHOD("get_64"), &FileAccess::get_64);
+	ClassDB::bind_method(D_METHOD("get_half"), &FileAccess::get_half);
 	ClassDB::bind_method(D_METHOD("get_float"), &FileAccess::get_float);
 	ClassDB::bind_method(D_METHOD("get_double"), &FileAccess::get_double);
 	ClassDB::bind_method(D_METHOD("get_real"), &FileAccess::get_real);
@@ -846,6 +855,7 @@ void FileAccess::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("store_16", "value"), &FileAccess::store_16);
 	ClassDB::bind_method(D_METHOD("store_32", "value"), &FileAccess::store_32);
 	ClassDB::bind_method(D_METHOD("store_64", "value"), &FileAccess::store_64);
+	ClassDB::bind_method(D_METHOD("store_half", "value"), &FileAccess::store_half);
 	ClassDB::bind_method(D_METHOD("store_float", "value"), &FileAccess::store_float);
 	ClassDB::bind_method(D_METHOD("store_double", "value"), &FileAccess::store_double);
 	ClassDB::bind_method(D_METHOD("store_real", "value"), &FileAccess::store_real);