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Add forward compat parsing of PackedVector4Array

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This new Variant type is being added in 4.3, and breaks compatibility with
earlier releases. By adding minimal parsing support (converting to plain Array)
we can at least open the scenes, and minimize the data loss when going back and
forth between minor versions.
This commit is contained in:
Rémi Verschelde
2024-05-03 00:17:34 +02:00
parent b9f01dcf87
commit 7aacb098f0
3 changed files with 50 additions and 6 deletions
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30
core/io/resource_format_binary.cpp
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@@ -85,15 +85,18 @@ enum {
VARIANT_VECTOR4 = 50,
VARIANT_VECTOR4I = 51,
VARIANT_PROJECTION = 52,
VARIANT_PACKED_VECTOR4_ARRAY = 53, // For compat with 4.3, parsing only.
OBJECT_EMPTY = 0,
OBJECT_EXTERNAL_RESOURCE = 1,
OBJECT_INTERNAL_RESOURCE = 2,
OBJECT_EXTERNAL_RESOURCE_INDEX = 3,
// Version 2: added 64 bits support for float and int.
// Version 3: changed nodepath encoding.
// Version 4: new string ID for ext/subresources, breaks forward compat.
// Version 2: Added 64 bits support for float and int.
// Version 3: Changed nodepath encoding.
// Version 4: New string ID for ext/subresources, breaks forward compat.
// Version 5: Ability to store script class in the header.
FORMAT_VERSION = 5,
// Version 6: Added PackedVector4Array variant. Parsing only.
FORMAT_VERSION_READABLE = 6,
FORMAT_VERSION_CAN_RENAME_DEPS = 1,
FORMAT_VERSION_NO_NODEPATH_PROPERTY = 3,
};
@@ -653,6 +656,27 @@ Error ResourceLoaderBinary::parse_variant(Variant &r_v) {
r_v = array;
} break;
case VARIANT_PACKED_VECTOR4_ARRAY: {
// For compatibility with 4.3, parsing only.
// Parse to a Vector<real_t> and then convert to a plain Array.
uint32_t len = f->get_32();
Vector<real_t> array_real;
array_real.resize(len * 4);
real_t *w = array_real.ptrw();
static_assert(sizeof(Vector4) == 4 * sizeof(real_t));
const Error err = read_reals(reinterpret_cast<real_t *>(w), f, len * 4);
ERR_FAIL_COND_V(err != OK, err);
Array array;
array.resize(len);
for (uint32_t i = 0; i < len; i++) {
array[i] = Vector4(w[i * 4 + 0], w[i * 4 + 1], w[i * 4 + 2], w[i * 4 + 3]);
}
r_v = array;
} break;
default: {
ERR_FAIL_V(ERR_FILE_CORRUPT);
} break;