feat(editor): add --validate-glb and --info-glb for glTF inspection

Companion to --validate-{wom,wob,woc,whm,all}: now the .glb files
we emit (and any third-party .glbs we receive) get the same deep-
check treatment.

  wowee_editor --info-glb model.glb        # show metadata, exit 0
  wowee_editor --validate-glb model.glb    # show + exit 1 on errors

Shared parser, different verdict policy. Checks:
- 12-byte header: magic = 'glTF' (0x46546C67), version = 2,
  totalLength matches actual file size
- JSON chunk: type = 'JSON' (0x4E4F534A), length within file
- BIN chunk: type = 'BIN\0' (0x004E4942), length within file
- asset.version is '2.0' (per-spec required string)
- accessor.bufferView indices in range
- bufferView.byteOffset+byteLength fits within BIN chunk

Reports counts: meshes, primitives, accessors, bufferViews, buffers,
plus chunk sizes. JSON mode emits structured output for CI scripts.

Verified on a real --export-whm-glb output (256-primitive terrain,
929KB total): all checks pass clean. Synthesized a broken file
with corrupted magic bytes: --validate-glb correctly reports
"magic is not 'glTF'" and exits 1.
This commit is contained in:
Kelsi 2026-05-06 13:31:31 -07:00
parent c1c1f1b2a8
commit 749aa18f0d

View file

@ -496,6 +496,10 @@ static void printUsage(const char* argv0) {
std::printf(" Deep-check a WHM/WOT terrain pair for NaN heights and bad placements\n");
std::printf(" --validate-all <dir> [--json]\n");
std::printf(" Recursively run all per-format validators on every file\n");
std::printf(" --validate-glb <path> [--json]\n");
std::printf(" Verify a glTF 2.0 binary's structure (magic, chunks, JSON, accessors)\n");
std::printf(" --info-glb <path> [--json]\n");
std::printf(" Print glTF 2.0 binary metadata (chunks, mesh/primitive counts, accessors)\n");
std::printf(" --zone-summary <zoneDir> [--json]\n");
std::printf(" One-shot validate + creature/object/quest counts and exit\n");
std::printf(" --export-zone-summary-md <zoneDir> [out.md]\n");
@ -583,7 +587,8 @@ int main(int argc, char* argv[]) {
"--list-quest-objectives", "--list-quest-rewards",
"--unpack-wcp", "--pack-wcp",
"--validate", "--validate-wom", "--validate-wob", "--validate-woc",
"--validate-whm", "--validate-all", "--zone-summary",
"--validate-whm", "--validate-all", "--validate-glb", "--info-glb",
"--zone-summary",
"--export-zone-summary-md", "--export-quest-graph",
"--scaffold-zone", "--add-tile", "--remove-tile", "--list-tiles",
"--for-each-zone", "--zone-stats", "--list-zone-deps",
@ -3177,6 +3182,184 @@ int main(int argc, char* argv[]) {
for (const auto& e : errs) std::printf(" - %s\n", e.c_str());
}
return 1;
} else if ((std::strcmp(argv[i], "--validate-glb") == 0 ||
std::strcmp(argv[i], "--info-glb") == 0) && i + 1 < argc) {
// Shared handler: --validate-glb errors out on broken structure;
// --info-glb prints the same metadata but exits 0 unless the
// file is unreadable. Same parser, different verdict policy.
bool isValidate = (std::strcmp(argv[i], "--validate-glb") == 0);
std::string path = argv[++i];
bool jsonOut = (i + 1 < argc &&
std::strcmp(argv[i + 1], "--json") == 0);
if (jsonOut) i++;
std::ifstream in(path, std::ios::binary);
if (!in) {
std::fprintf(stderr,
"%s: cannot open %s\n",
isValidate ? "validate-glb" : "info-glb", path.c_str());
return 1;
}
std::vector<uint8_t> bytes((std::istreambuf_iterator<char>(in)),
std::istreambuf_iterator<char>());
std::vector<std::string> errors;
// 12-byte header: 'glTF' magic, version=2, total length.
uint32_t magic = 0, version = 0, totalLen = 0;
if (bytes.size() < 12) {
errors.push_back("file too short for glTF header (need 12 bytes)");
} else {
std::memcpy(&magic, &bytes[0], 4);
std::memcpy(&version, &bytes[4], 4);
std::memcpy(&totalLen, &bytes[8], 4);
if (magic != 0x46546C67) {
errors.push_back("magic is not 'glTF' (0x46546C67)");
}
if (version != 2) {
errors.push_back("version " + std::to_string(version) +
" not supported (only glTF 2.0)");
}
if (totalLen != bytes.size()) {
errors.push_back("totalLength=" + std::to_string(totalLen) +
" != file size " + std::to_string(bytes.size()));
}
}
// JSON chunk follows: 4-byte length, 4-byte type ('JSON'),
// then payload. Then BIN chunk same shape.
uint32_t jsonLen = 0, jsonType = 0;
uint32_t binLen = 0, binType = 0;
std::string jsonStr;
std::vector<uint8_t> binData;
if (errors.empty()) {
if (bytes.size() < 20) {
errors.push_back("missing JSON chunk header");
} else {
std::memcpy(&jsonLen, &bytes[12], 4);
std::memcpy(&jsonType, &bytes[16], 4);
if (jsonType != 0x4E4F534A) {
errors.push_back("first chunk type is not 'JSON' (0x4E4F534A)");
}
if (20 + jsonLen > bytes.size()) {
errors.push_back("JSON chunk extends past file end");
} else {
jsonStr.assign(bytes.begin() + 20,
bytes.begin() + 20 + jsonLen);
}
}
size_t binOff = 20 + jsonLen;
if (binOff + 8 <= bytes.size()) {
std::memcpy(&binLen, &bytes[binOff], 4);
std::memcpy(&binType, &bytes[binOff + 4], 4);
if (binType != 0x004E4942) {
errors.push_back("second chunk type is not 'BIN\\0' (0x004E4942)");
}
if (binOff + 8 + binLen > bytes.size()) {
errors.push_back("BIN chunk extends past file end");
} else {
binData.assign(bytes.begin() + binOff + 8,
bytes.begin() + binOff + 8 + binLen);
}
}
// BIN chunk is optional in spec; only flag missing if
// accessors below reference a buffer.
}
// Parse JSON and validate structure.
nlohmann::json gj;
int meshCount = 0, primitiveCount = 0, accessorCount = 0,
bufferViewCount = 0, bufferCount = 0;
std::string assetVersion;
if (errors.empty() && !jsonStr.empty()) {
try {
gj = nlohmann::json::parse(jsonStr);
assetVersion = gj.value("/asset/version"_json_pointer, std::string{});
if (assetVersion != "2.0") {
errors.push_back("asset.version is '" + assetVersion +
"', not '2.0'");
}
if (gj.contains("meshes") && gj["meshes"].is_array()) {
meshCount = static_cast<int>(gj["meshes"].size());
for (const auto& m : gj["meshes"]) {
if (m.contains("primitives") && m["primitives"].is_array()) {
primitiveCount += static_cast<int>(m["primitives"].size());
}
}
}
if (gj.contains("accessors") && gj["accessors"].is_array()) {
accessorCount = static_cast<int>(gj["accessors"].size());
// Verify each accessor's bufferView exists.
for (size_t a = 0; a < gj["accessors"].size(); ++a) {
const auto& acc = gj["accessors"][a];
if (acc.contains("bufferView")) {
int bv = acc["bufferView"];
if (!gj.contains("bufferViews") ||
bv >= static_cast<int>(gj["bufferViews"].size())) {
errors.push_back("accessor " + std::to_string(a) +
" bufferView=" + std::to_string(bv) +
" out of range");
}
}
}
}
if (gj.contains("bufferViews") && gj["bufferViews"].is_array()) {
bufferViewCount = static_cast<int>(gj["bufferViews"].size());
for (size_t b = 0; b < gj["bufferViews"].size(); ++b) {
const auto& bv = gj["bufferViews"][b];
uint32_t bo = bv.value("byteOffset", 0u);
uint32_t bl = bv.value("byteLength", 0u);
uint64_t end = uint64_t(bo) + bl;
if (end > binLen) {
errors.push_back("bufferView " + std::to_string(b) +
" range [" + std::to_string(bo) +
", " + std::to_string(end) +
") past BIN chunk length " +
std::to_string(binLen));
}
}
}
if (gj.contains("buffers") && gj["buffers"].is_array()) {
bufferCount = static_cast<int>(gj["buffers"].size());
}
} catch (const std::exception& e) {
errors.push_back(std::string("JSON parse error: ") + e.what());
}
}
int errorCount = static_cast<int>(errors.size());
if (jsonOut) {
nlohmann::json j;
j["glb"] = path;
j["fileSize"] = bytes.size();
j["version"] = version;
j["assetVersion"] = assetVersion;
j["totalLength"] = totalLen;
j["jsonLength"] = jsonLen;
j["binLength"] = binLen;
j["meshes"] = meshCount;
j["primitives"] = primitiveCount;
j["accessors"] = accessorCount;
j["bufferViews"] = bufferViewCount;
j["buffers"] = bufferCount;
j["errorCount"] = errorCount;
j["errors"] = errors;
j["passed"] = errors.empty();
std::printf("%s\n", j.dump(2).c_str());
return (isValidate && errorCount > 0) ? 1 : 0;
}
std::printf("GLB: %s\n", path.c_str());
std::printf(" file bytes : %zu\n", bytes.size());
std::printf(" glTF version: %u (asset.version=%s)\n",
version, assetVersion.empty() ? "?" : assetVersion.c_str());
std::printf(" totalLength : %u\n", totalLen);
std::printf(" JSON chunk : %u bytes\n", jsonLen);
std::printf(" BIN chunk : %u bytes\n", binLen);
std::printf(" meshes : %d (%d primitives)\n",
meshCount, primitiveCount);
std::printf(" accessors : %d bufferViews: %d buffers: %d\n",
accessorCount, bufferViewCount, bufferCount);
if (errors.empty()) {
std::printf(" PASSED\n");
return 0;
}
std::printf(" FAILED — %d error(s):\n", errorCount);
for (const auto& e : errors) std::printf(" - %s\n", e.c_str());
return isValidate ? 1 : 0;
} else if (std::strcmp(argv[i], "--export-obj") == 0 && i + 1 < argc) {
// Convert WOM (our open M2 replacement) to Wavefront OBJ — a
// universally supported text format that opens directly in