Adds a structured DIGEST block (asset, buffers w/ FNV-1a hash, bufferViews,
accessors w/ min/max, mesh primitives w/ sorted attribute maps, nodes w/
normalized TRS+matrix, materials, textures/samplers/images, skins,
animations, cameras, scenes) emitted by both loader_example (v1) and
tester_v3_c (v3 C, now accepting a file arg). test_runner.py runs both,
diffs the digests, and reports counts/digest mismatches with v1 as truth.
Also rolls in /simplify follow-ups on top of d2837e3: a shared
tg3__json_number_to_double helper to dedupe inline number coercions, a
collapsed fuzz_gltf_v3_c harness using a single tg3_fuzz_run dispatcher,
a rewritten max_safe_uint64_real comment explaining the 53-bit mantissa
constraint, and a tests/Makefile fix so tester_v3_c is a real prerequisite
of `all` (built once via the dedicated rule, not duplicated).
Verifier passes 134/134 on the Khronos glTF-Sample-Models/2.0 suite.
bufferView.target and image.mime_type/uri are intentionally excluded from
the digest: v1 infers target from accessor usage and rewrites image
URIs/mime via stb_image, neither of which is a parse-fidelity concern.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reject non-finite/out-of-range JSON numbers in int32/uint64 fields and
array/attribute elements instead of silently truncating, initialize the
model on parse-file failure, and free the partial JSON document when the
root is not an object. Adds a pure-C libFuzzer harness (fuzz_gltf_v3_c)
alongside the existing C++ one and tests covering the new failure modes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Introduce a C-first TinyGLTF v3 runtime in tiny_gltf_v3.c with a pure-C JSON backend, hook the public header to the new implementation, and add CMake/test coverage for parse and write round-trips.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add tests/v3/fuzzer/ with libFuzzer harness covering all four parse
paths (auto-detect, JSON, GLB, float32 mode) with ASan+UBSan.
Fix two bugs found by 10+ hours of fuzzing (~23M iterations):
1. UB: (int64_t)inf in cj_parse_number when extreme exponents like
22222222e222222 produce infinity. Add cj_dbl_to_i64() that clamps
inf/NaN/out-of-range values before casting.
2. Null deref in tg3__parse_string when glTF array elements are not
JSON objects (e.g. "scenes": [[3]]). Add is_object() validation
in TG3__PARSE_ARRAY_SIMPLE and TG3__PARSE_ARRAY_IDX macros.
Verified clean: 5.8M additional runs with zero crashes after fixes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add TINYGLTF_BUILD_TESTS option to build unit tests via CMake
- Test runs from tests/ directory so relative paths work correctly
- Fix Windows file sharing violation in images-as-is test by closing
fstream before stbi_load attempts to open the same file
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
tinygltf.h - serialize empty scenes as empty json objects; tester.cc - ad respective test case, bring test cases in correct order, tag test case for light index with correct issue number and fix it to compare to deserialozed model
tiny_gltf.h - access correct json object when serializing a light, this fixes an assert and causes us to serialze the light index properly; tester.cc - add respective testcase
- Add feature to limit file size for external resources(images, buffers)
- Use strlen to correctly retrieve a string from a string which contains multiple null-characters.
- Return fail when opening a directory(Posix only). Fixes#416
Tinygltf is able to write files defined by a URI, so it needs to be able
to decode it. Since it may also modify the path where the image is saved
it may need to re-encode the URI too. This patch provides an API to set
URI encoding and decoding callbacks and exposes the default decode
method.
Uses the existing dlib::urldecode as a decode default. The encode
callback is left null, matching existing behaviour.
Updates the WriteImageDataFunction signature to include
tinygltf::URICallbacks.
Decodes the image and buffer uris before using them as a filename.
If the encode callback is set, encodes the written image location in the
default WriteImageDataFunction and encodes generated buffer locations
when writing .bin files.
Adds a save+load step to the test image-uri-spaces to verify uri
encoding.
Modifies UpdateImageObject() so that Returning false from the
WriteImageDataFunction callback results in the WriteGltfScene*() call
returning false.
Does not call WriteImageDataFunction if there is no image data.
Adds test case serialize-image-failure to verify the callback return
code is able to cause an overall failure to save the gltf.
Adds 'const' to all Serialize*() methods.
Updates WriteImageData callback to take a URI out pointer that was
previously being written to the Image::uri, which is now const.
This breaks the WriteImageData API and as a side effect, Image::uri will
no longer contain the written image URI after saving.
Adds test serialize-const-image, which verifies the model's image is not
changed (because it's const), but the uri written to the gltf json is
still correct.
Adds test serialize-image-callback that defines a WriteImageDataFunction
and also verifies the uri can be overwritten.
This allows multiple gltf's to be loaded/saved in parallel. It removes the restriction of a single JsonDocument active at once which is default behavior. Enable with TINYGLTF_USE_RAPIDJSON_CRTALLOCATOR
