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gltf_document.cpp
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gltf_document.cpp
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/**************************************************************************/
/* gltf_document.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "gltf_document.h"
#include "extensions/gltf_spec_gloss.h"
#include "gltf_state.h"
#include "skin_tool.h"
#include "core/config/project_settings.h"
#include "core/crypto/crypto_core.h"
#include "core/io/config_file.h"
#include "core/io/dir_access.h"
#include "core/io/file_access.h"
#include "core/io/file_access_memory.h"
#include "core/io/json.h"
#include "core/io/stream_peer.h"
#include "core/object/object_id.h"
#include "core/version.h"
#include "scene/3d/bone_attachment_3d.h"
#include "scene/3d/camera_3d.h"
#include "scene/3d/importer_mesh_instance_3d.h"
#include "scene/3d/light_3d.h"
#include "scene/3d/mesh_instance_3d.h"
#include "scene/3d/multimesh_instance_3d.h"
#include "scene/resources/3d/skin.h"
#include "scene/resources/image_texture.h"
#include "scene/resources/portable_compressed_texture.h"
#include "scene/resources/surface_tool.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_file_system.h"
#endif
// FIXME: Hardcoded to avoid editor dependency.
#define GLTF_IMPORT_GENERATE_TANGENT_ARRAYS 8
#define GLTF_IMPORT_USE_NAMED_SKIN_BINDS 16
#define GLTF_IMPORT_DISCARD_MESHES_AND_MATERIALS 32
#define GLTF_IMPORT_FORCE_DISABLE_MESH_COMPRESSION 64
#include <stdio.h>
#include <stdlib.h>
#include <cstdint>
constexpr int COMPONENT_COUNT_FOR_ACCESSOR_TYPE[7] = {
1, 2, 3, 4, 4, 9, 16
};
static void _attach_extras_to_meta(const Dictionary &p_extras, Ref<Resource> p_node) {
if (!p_extras.is_empty()) {
p_node->set_meta("extras", p_extras);
}
}
static void _attach_meta_to_extras(Ref<Resource> p_node, Dictionary &p_json) {
if (p_node->has_meta("extras")) {
Dictionary node_extras = p_node->get_meta("extras");
if (p_json.has("extras")) {
Dictionary extras = p_json["extras"];
extras.merge(node_extras);
} else {
p_json["extras"] = node_extras;
}
}
}
static Ref<ImporterMesh> _mesh_to_importer_mesh(Ref<Mesh> p_mesh) {
Ref<ImporterMesh> importer_mesh;
importer_mesh.instantiate();
if (p_mesh.is_null()) {
return importer_mesh;
}
Ref<ArrayMesh> array_mesh = p_mesh;
if (p_mesh->get_blend_shape_count()) {
ArrayMesh::BlendShapeMode shape_mode = ArrayMesh::BLEND_SHAPE_MODE_NORMALIZED;
if (array_mesh.is_valid()) {
shape_mode = array_mesh->get_blend_shape_mode();
}
importer_mesh->set_blend_shape_mode(shape_mode);
for (int morph_i = 0; morph_i < p_mesh->get_blend_shape_count(); morph_i++) {
importer_mesh->add_blend_shape(p_mesh->get_blend_shape_name(morph_i));
}
}
for (int32_t surface_i = 0; surface_i < p_mesh->get_surface_count(); surface_i++) {
Array array = p_mesh->surface_get_arrays(surface_i);
Ref<Material> mat = p_mesh->surface_get_material(surface_i);
String mat_name;
if (mat.is_valid()) {
mat_name = mat->get_name();
} else {
// Assign default material when no material is assigned.
mat = Ref<StandardMaterial3D>(memnew(StandardMaterial3D));
}
importer_mesh->add_surface(p_mesh->surface_get_primitive_type(surface_i),
array, p_mesh->surface_get_blend_shape_arrays(surface_i), p_mesh->surface_get_lods(surface_i), mat,
mat_name, p_mesh->surface_get_format(surface_i));
}
importer_mesh->merge_meta_from(*p_mesh);
return importer_mesh;
}
Error GLTFDocument::_serialize(Ref<GLTFState> p_state) {
for (Ref<GLTFDocumentExtension> ext : document_extensions) {
ERR_CONTINUE(ext.is_null());
Error err = ext->export_preserialize(p_state);
ERR_CONTINUE(err != OK);
}
/* STEP CONVERT MESH INSTANCES */
_convert_mesh_instances(p_state);
/* STEP SERIALIZE CAMERAS */
Error err = _serialize_cameras(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP 3 CREATE SKINS */
err = _serialize_skins(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE MESHES (we have enough info now) */
err = _serialize_meshes(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE TEXTURES */
err = _serialize_materials(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE TEXTURE SAMPLERS */
err = _serialize_texture_samplers(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE ANIMATIONS */
err = _serialize_animations(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE ACCESSORS */
err = _encode_accessors(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE IMAGES */
err = _serialize_images(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE TEXTURES */
err = _serialize_textures(p_state);
if (err != OK) {
return Error::FAILED;
}
for (GLTFBufferViewIndex i = 0; i < p_state->buffer_views.size(); i++) {
p_state->buffer_views.write[i]->buffer = 0;
}
/* STEP SERIALIZE BUFFER VIEWS */
err = _encode_buffer_views(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE NODES */
err = _serialize_nodes(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE SCENE */
err = _serialize_scenes(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE LIGHTS */
err = _serialize_lights(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE EXTENSIONS */
err = _serialize_gltf_extensions(p_state);
if (err != OK) {
return Error::FAILED;
}
/* STEP SERIALIZE VERSION */
err = _serialize_asset_header(p_state);
if (err != OK) {
return Error::FAILED;
}
for (Ref<GLTFDocumentExtension> ext : document_extensions) {
ERR_CONTINUE(ext.is_null());
err = ext->export_post(p_state);
ERR_FAIL_COND_V(err != OK, err);
}
return OK;
}
Error GLTFDocument::_serialize_gltf_extensions(Ref<GLTFState> p_state) const {
Vector<String> extensions_used = p_state->extensions_used;
Vector<String> extensions_required = p_state->extensions_required;
if (!p_state->lights.is_empty()) {
extensions_used.push_back("KHR_lights_punctual");
}
if (p_state->use_khr_texture_transform) {
extensions_used.push_back("KHR_texture_transform");
extensions_required.push_back("KHR_texture_transform");
}
if (!extensions_used.is_empty()) {
extensions_used.sort();
p_state->json["extensionsUsed"] = extensions_used;
}
if (!extensions_required.is_empty()) {
extensions_required.sort();
p_state->json["extensionsRequired"] = extensions_required;
}
return OK;
}
Error GLTFDocument::_serialize_scenes(Ref<GLTFState> p_state) {
// Godot only supports one scene per glTF file.
Array scenes;
Dictionary scene_dict;
scenes.append(scene_dict);
p_state->json["scenes"] = scenes;
p_state->json["scene"] = 0;
// Add nodes to the scene dict.
if (!p_state->root_nodes.is_empty()) {
scene_dict["nodes"] = p_state->root_nodes;
}
if (!p_state->scene_name.is_empty()) {
scene_dict["name"] = p_state->scene_name;
}
return OK;
}
Error GLTFDocument::_parse_json(const String &p_path, Ref<GLTFState> p_state) {
Error err;
Ref<FileAccess> file = FileAccess::open(p_path, FileAccess::READ, &err);
if (file.is_null()) {
return err;
}
Vector<uint8_t> array;
array.resize(file->get_length());
file->get_buffer(array.ptrw(), array.size());
String text;
text.parse_utf8((const char *)array.ptr(), array.size());
JSON json;
err = json.parse(text);
if (err != OK) {
_err_print_error("", p_path.utf8().get_data(), json.get_error_line(), json.get_error_message().utf8().get_data(), false, ERR_HANDLER_SCRIPT);
return err;
}
p_state->json = json.get_data();
return OK;
}
Error GLTFDocument::_parse_glb(Ref<FileAccess> p_file, Ref<GLTFState> p_state) {
ERR_FAIL_COND_V(p_file.is_null(), ERR_INVALID_PARAMETER);
ERR_FAIL_COND_V(p_state.is_null(), ERR_INVALID_PARAMETER);
ERR_FAIL_COND_V(p_file->get_position() != 0, ERR_FILE_CANT_READ);
uint32_t magic = p_file->get_32();
ERR_FAIL_COND_V(magic != 0x46546C67, ERR_FILE_UNRECOGNIZED); //glTF
p_file->get_32(); // version
p_file->get_32(); // length
uint32_t chunk_length = p_file->get_32();
uint32_t chunk_type = p_file->get_32();
ERR_FAIL_COND_V(chunk_type != 0x4E4F534A, ERR_PARSE_ERROR); //JSON
Vector<uint8_t> json_data;
json_data.resize(chunk_length);
uint32_t len = p_file->get_buffer(json_data.ptrw(), chunk_length);
ERR_FAIL_COND_V(len != chunk_length, ERR_FILE_CORRUPT);
String text;
text.parse_utf8((const char *)json_data.ptr(), json_data.size());
JSON json;
Error err = json.parse(text);
if (err != OK) {
_err_print_error("", "", json.get_error_line(), json.get_error_message().utf8().get_data(), false, ERR_HANDLER_SCRIPT);
return err;
}
p_state->json = json.get_data();
//data?
chunk_length = p_file->get_32();
chunk_type = p_file->get_32();
if (p_file->eof_reached()) {
return OK; //all good
}
ERR_FAIL_COND_V(chunk_type != 0x004E4942, ERR_PARSE_ERROR); //BIN
p_state->glb_data.resize(chunk_length);
len = p_file->get_buffer(p_state->glb_data.ptrw(), chunk_length);
ERR_FAIL_COND_V(len != chunk_length, ERR_FILE_CORRUPT);
return OK;
}
static Array _vec3_to_arr(const Vector3 &p_vec3) {
Array array;
array.resize(3);
array[0] = p_vec3.x;
array[1] = p_vec3.y;
array[2] = p_vec3.z;
return array;
}
static Vector3 _arr_to_vec3(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 3, Vector3());
return Vector3(p_array[0], p_array[1], p_array[2]);
}
static Array _quaternion_to_array(const Quaternion &p_quaternion) {
Array array;
array.resize(4);
array[0] = p_quaternion.x;
array[1] = p_quaternion.y;
array[2] = p_quaternion.z;
array[3] = p_quaternion.w;
return array;
}
static Quaternion _arr_to_quaternion(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 4, Quaternion());
return Quaternion(p_array[0], p_array[1], p_array[2], p_array[3]);
}
static Transform3D _arr_to_xform(const Array &p_array) {
ERR_FAIL_COND_V(p_array.size() != 16, Transform3D());
Transform3D xform;
xform.basis.set_column(Vector3::AXIS_X, Vector3(p_array[0], p_array[1], p_array[2]));
xform.basis.set_column(Vector3::AXIS_Y, Vector3(p_array[4], p_array[5], p_array[6]));
xform.basis.set_column(Vector3::AXIS_Z, Vector3(p_array[8], p_array[9], p_array[10]));
xform.set_origin(Vector3(p_array[12], p_array[13], p_array[14]));
return xform;
}
static Vector<real_t> _xform_to_array(const Transform3D p_transform) {
Vector<real_t> array;
array.resize(16);
Vector3 axis_x = p_transform.get_basis().get_column(Vector3::AXIS_X);
array.write[0] = axis_x.x;
array.write[1] = axis_x.y;
array.write[2] = axis_x.z;
array.write[3] = 0.0f;
Vector3 axis_y = p_transform.get_basis().get_column(Vector3::AXIS_Y);
array.write[4] = axis_y.x;
array.write[5] = axis_y.y;
array.write[6] = axis_y.z;
array.write[7] = 0.0f;
Vector3 axis_z = p_transform.get_basis().get_column(Vector3::AXIS_Z);
array.write[8] = axis_z.x;
array.write[9] = axis_z.y;
array.write[10] = axis_z.z;
array.write[11] = 0.0f;
Vector3 origin = p_transform.get_origin();
array.write[12] = origin.x;
array.write[13] = origin.y;
array.write[14] = origin.z;
array.write[15] = 1.0f;
return array;
}
Error GLTFDocument::_serialize_nodes(Ref<GLTFState> p_state) {
Array nodes;
for (int i = 0; i < p_state->nodes.size(); i++) {
Dictionary node;
Ref<GLTFNode> gltf_node = p_state->nodes[i];
Dictionary extensions;
node["extensions"] = extensions;
if (!gltf_node->get_name().is_empty()) {
node["name"] = gltf_node->get_name();
}
if (gltf_node->camera != -1) {
node["camera"] = gltf_node->camera;
}
if (gltf_node->light != -1) {
Dictionary lights_punctual;
extensions["KHR_lights_punctual"] = lights_punctual;
lights_punctual["light"] = gltf_node->light;
}
if (gltf_node->mesh != -1) {
node["mesh"] = gltf_node->mesh;
}
if (gltf_node->skin != -1) {
node["skin"] = gltf_node->skin;
}
if (gltf_node->skeleton != -1 && gltf_node->skin < 0) {
}
if (gltf_node->transform.basis.is_orthogonal()) {
// An orthogonal transform is decomposable into TRS, so prefer that.
const Vector3 position = gltf_node->get_position();
if (!position.is_zero_approx()) {
node["translation"] = _vec3_to_arr(position);
}
const Quaternion rotation = gltf_node->get_rotation();
if (!rotation.is_equal_approx(Quaternion())) {
node["rotation"] = _quaternion_to_array(rotation);
}
const Vector3 scale = gltf_node->get_scale();
if (!scale.is_equal_approx(Vector3(1.0f, 1.0f, 1.0f))) {
node["scale"] = _vec3_to_arr(scale);
}
} else {
node["matrix"] = _xform_to_array(gltf_node->transform);
}
if (gltf_node->children.size()) {
Array children;
for (int j = 0; j < gltf_node->children.size(); j++) {
children.push_back(gltf_node->children[j]);
}
node["children"] = children;
}
Node *scene_node = nullptr;
if (i < (int)p_state->scene_nodes.size()) {
scene_node = p_state->scene_nodes[i];
}
for (Ref<GLTFDocumentExtension> ext : document_extensions) {
ERR_CONTINUE(ext.is_null());
Error err = ext->export_node(p_state, gltf_node, node, scene_node);
ERR_CONTINUE(err != OK);
}
if (extensions.is_empty()) {
node.erase("extensions");
}
_attach_meta_to_extras(gltf_node, node);
nodes.push_back(node);
}
if (!nodes.is_empty()) {
p_state->json["nodes"] = nodes;
}
return OK;
}
String GLTFDocument::_gen_unique_name(Ref<GLTFState> p_state, const String &p_name) {
return _gen_unique_name_static(p_state->unique_names, p_name);
}
String GLTFDocument::_sanitize_animation_name(const String &p_name) {
String anim_name = p_name.validate_node_name();
return AnimationLibrary::validate_library_name(anim_name);
}
String GLTFDocument::_gen_unique_animation_name(Ref<GLTFState> p_state, const String &p_name) {
const String s_name = _sanitize_animation_name(p_name);
String u_name;
int index = 1;
while (true) {
u_name = s_name;
if (index > 1) {
u_name += itos(index);
}
if (!p_state->unique_animation_names.has(u_name)) {
break;
}
index++;
}
p_state->unique_animation_names.insert(u_name);
return u_name;
}
String GLTFDocument::_sanitize_bone_name(const String &p_name) {
String bone_name = p_name;
bone_name = bone_name.replace(":", "_");
bone_name = bone_name.replace("/", "_");
return bone_name;
}
String GLTFDocument::_gen_unique_bone_name(Ref<GLTFState> p_state, const GLTFSkeletonIndex p_skel_i, const String &p_name) {
String s_name = _sanitize_bone_name(p_name);
if (s_name.is_empty()) {
s_name = "bone";
}
String u_name;
int index = 1;
while (true) {
u_name = s_name;
if (index > 1) {
u_name += "_" + itos(index);
}
if (!p_state->skeletons[p_skel_i]->unique_names.has(u_name)) {
break;
}
index++;
}
p_state->skeletons.write[p_skel_i]->unique_names.insert(u_name);
return u_name;
}
Error GLTFDocument::_parse_scenes(Ref<GLTFState> p_state) {
p_state->unique_names.insert("Skeleton3D"); // Reserve skeleton name.
ERR_FAIL_COND_V(!p_state->json.has("scenes"), ERR_FILE_CORRUPT);
const Array &scenes = p_state->json["scenes"];
int loaded_scene = 0;
if (p_state->json.has("scene")) {
loaded_scene = p_state->json["scene"];
} else {
WARN_PRINT("The load-time scene is not defined in the glTF2 file. Picking the first scene.");
}
if (scenes.size()) {
ERR_FAIL_COND_V(loaded_scene >= scenes.size(), ERR_FILE_CORRUPT);
const Dictionary &scene_dict = scenes[loaded_scene];
ERR_FAIL_COND_V(!scene_dict.has("nodes"), ERR_UNAVAILABLE);
const Array &nodes = scene_dict["nodes"];
for (int j = 0; j < nodes.size(); j++) {
p_state->root_nodes.push_back(nodes[j]);
}
// Determine what to use for the scene name.
if (scene_dict.has("name") && !String(scene_dict["name"]).is_empty() && !((String)scene_dict["name"]).begins_with("Scene")) {
p_state->scene_name = scene_dict["name"];
} else if (p_state->scene_name.is_empty()) {
p_state->scene_name = p_state->filename;
}
if (_naming_version == 0) {
p_state->scene_name = _gen_unique_name(p_state, p_state->scene_name);
}
}
return OK;
}
Error GLTFDocument::_parse_nodes(Ref<GLTFState> p_state) {
ERR_FAIL_COND_V(!p_state->json.has("nodes"), ERR_FILE_CORRUPT);
const Array &nodes = p_state->json["nodes"];
for (int i = 0; i < nodes.size(); i++) {
Ref<GLTFNode> node;
node.instantiate();
const Dictionary &n = nodes[i];
if (n.has("name")) {
node->set_original_name(n["name"]);
node->set_name(n["name"]);
}
if (n.has("camera")) {
node->camera = n["camera"];
}
if (n.has("mesh")) {
node->mesh = n["mesh"];
}
if (n.has("skin")) {
node->skin = n["skin"];
}
if (n.has("matrix")) {
node->transform = _arr_to_xform(n["matrix"]);
} else {
if (n.has("translation")) {
node->set_position(_arr_to_vec3(n["translation"]));
}
if (n.has("rotation")) {
node->set_rotation(_arr_to_quaternion(n["rotation"]));
}
if (n.has("scale")) {
node->set_scale(_arr_to_vec3(n["scale"]));
}
}
node->set_additional_data("GODOT_rest_transform", node->transform);
if (n.has("extensions")) {
Dictionary extensions = n["extensions"];
if (extensions.has("KHR_lights_punctual")) {
Dictionary lights_punctual = extensions["KHR_lights_punctual"];
if (lights_punctual.has("light")) {
GLTFLightIndex light = lights_punctual["light"];
node->light = light;
}
}
for (Ref<GLTFDocumentExtension> ext : document_extensions) {
ERR_CONTINUE(ext.is_null());
Error err = ext->parse_node_extensions(p_state, node, extensions);
ERR_CONTINUE_MSG(err != OK, "glTF: Encountered error " + itos(err) + " when parsing node extensions for node " + node->get_name() + " in file " + p_state->filename + ". Continuing.");
}
}
if (n.has("extras")) {
_attach_extras_to_meta(n["extras"], node);
}
if (n.has("children")) {
const Array &children = n["children"];
for (int j = 0; j < children.size(); j++) {
node->children.push_back(children[j]);
}
}
p_state->nodes.push_back(node);
}
// build the hierarchy
for (GLTFNodeIndex node_i = 0; node_i < p_state->nodes.size(); node_i++) {
for (int j = 0; j < p_state->nodes[node_i]->children.size(); j++) {
GLTFNodeIndex child_i = p_state->nodes[node_i]->children[j];
ERR_FAIL_INDEX_V(child_i, p_state->nodes.size(), ERR_FILE_CORRUPT);
ERR_CONTINUE(p_state->nodes[child_i]->parent != -1); //node already has a parent, wtf.
p_state->nodes.write[child_i]->parent = node_i;
}
}
_compute_node_heights(p_state);
return OK;
}
void GLTFDocument::_compute_node_heights(Ref<GLTFState> p_state) {
p_state->root_nodes.clear();
for (GLTFNodeIndex node_i = 0; node_i < p_state->nodes.size(); ++node_i) {
Ref<GLTFNode> node = p_state->nodes[node_i];
node->height = 0;
GLTFNodeIndex current_i = node_i;
while (current_i >= 0) {
const GLTFNodeIndex parent_i = p_state->nodes[current_i]->parent;
if (parent_i >= 0) {
++node->height;
}
current_i = parent_i;
}
if (node->height == 0) {
p_state->root_nodes.push_back(node_i);
}
}
}
static Vector<uint8_t> _parse_base64_uri(const String &p_uri) {
int start = p_uri.find(",");
ERR_FAIL_COND_V(start == -1, Vector<uint8_t>());
CharString substr = p_uri.substr(start + 1).ascii();
int strlen = substr.length();
Vector<uint8_t> buf;
buf.resize(strlen / 4 * 3 + 1 + 1);
size_t len = 0;
ERR_FAIL_COND_V(CryptoCore::b64_decode(buf.ptrw(), buf.size(), &len, (unsigned char *)substr.get_data(), strlen) != OK, Vector<uint8_t>());
buf.resize(len);
return buf;
}
Error GLTFDocument::_encode_buffer_glb(Ref<GLTFState> p_state, const String &p_path) {
print_verbose("glTF: Total buffers: " + itos(p_state->buffers.size()));
if (p_state->buffers.is_empty()) {
return OK;
}
Array buffers;
if (!p_state->buffers.is_empty()) {
Vector<uint8_t> buffer_data = p_state->buffers[0];
Dictionary gltf_buffer;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
for (GLTFBufferIndex i = 1; i < p_state->buffers.size() - 1; i++) {
Vector<uint8_t> buffer_data = p_state->buffers[i];
Dictionary gltf_buffer;
String filename = p_path.get_basename().get_file() + itos(i) + ".bin";
String path = p_path.get_base_dir() + "/" + filename;
Error err;
Ref<FileAccess> file = FileAccess::open(path, FileAccess::WRITE, &err);
if (file.is_null()) {
return err;
}
if (buffer_data.size() == 0) {
return OK;
}
file->create(FileAccess::ACCESS_RESOURCES);
file->store_buffer(buffer_data.ptr(), buffer_data.size());
gltf_buffer["uri"] = filename;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
p_state->json["buffers"] = buffers;
return OK;
}
Error GLTFDocument::_encode_buffer_bins(Ref<GLTFState> p_state, const String &p_path) {
print_verbose("glTF: Total buffers: " + itos(p_state->buffers.size()));
if (p_state->buffers.is_empty()) {
return OK;
}
Array buffers;
for (GLTFBufferIndex i = 0; i < p_state->buffers.size(); i++) {
Vector<uint8_t> buffer_data = p_state->buffers[i];
Dictionary gltf_buffer;
String filename = p_path.get_basename().get_file() + itos(i) + ".bin";
String path = p_path.get_base_dir() + "/" + filename;
Error err;
Ref<FileAccess> file = FileAccess::open(path, FileAccess::WRITE, &err);
if (file.is_null()) {
return err;
}
if (buffer_data.size() == 0) {
return OK;
}
file->create(FileAccess::ACCESS_RESOURCES);
file->store_buffer(buffer_data.ptr(), buffer_data.size());
gltf_buffer["uri"] = filename;
gltf_buffer["byteLength"] = buffer_data.size();
buffers.push_back(gltf_buffer);
}
p_state->json["buffers"] = buffers;
return OK;
}
Error GLTFDocument::_parse_buffers(Ref<GLTFState> p_state, const String &p_base_path) {
if (!p_state->json.has("buffers")) {
return OK;
}
const Array &buffers = p_state->json["buffers"];
for (GLTFBufferIndex i = 0; i < buffers.size(); i++) {
if (i == 0 && p_state->glb_data.size()) {
p_state->buffers.push_back(p_state->glb_data);
} else {
const Dictionary &buffer = buffers[i];
if (buffer.has("uri")) {
Vector<uint8_t> buffer_data;
String uri = buffer["uri"];
if (uri.begins_with("data:")) { // Embedded data using base64.
// Validate data MIME types and throw an error if it's one we don't know/support.
if (!uri.begins_with("data:application/octet-stream;base64") &&
!uri.begins_with("data:application/gltf-buffer;base64")) {
ERR_PRINT("glTF: Got buffer with an unknown URI data type: " + uri);
}
buffer_data = _parse_base64_uri(uri);
} else { // Relative path to an external image file.
ERR_FAIL_COND_V(p_base_path.is_empty(), ERR_INVALID_PARAMETER);
uri = uri.uri_decode();
uri = p_base_path.path_join(uri).replace("\\", "/"); // Fix for Windows.
ERR_FAIL_COND_V_MSG(!FileAccess::exists(uri), ERR_FILE_NOT_FOUND, "glTF: Binary file not found: " + uri);
buffer_data = FileAccess::get_file_as_bytes(uri);
ERR_FAIL_COND_V_MSG(buffer_data.is_empty(), ERR_PARSE_ERROR, "glTF: Couldn't load binary file as an array: " + uri);
}
ERR_FAIL_COND_V(!buffer.has("byteLength"), ERR_PARSE_ERROR);
int byteLength = buffer["byteLength"];
ERR_FAIL_COND_V(byteLength < buffer_data.size(), ERR_PARSE_ERROR);
p_state->buffers.push_back(buffer_data);
}
}
}
print_verbose("glTF: Total buffers: " + itos(p_state->buffers.size()));
return OK;
}
Error GLTFDocument::_encode_buffer_views(Ref<GLTFState> p_state) {
Array buffers;
for (GLTFBufferViewIndex i = 0; i < p_state->buffer_views.size(); i++) {
Dictionary d;
Ref<GLTFBufferView> buffer_view = p_state->buffer_views[i];
d["buffer"] = buffer_view->buffer;
d["byteLength"] = buffer_view->byte_length;
d["byteOffset"] = buffer_view->byte_offset;
if (buffer_view->byte_stride != -1) {
d["byteStride"] = buffer_view->byte_stride;
}
if (buffer_view->indices) {
d["target"] = GLTFDocument::ELEMENT_ARRAY_BUFFER;
} else if (buffer_view->vertex_attributes) {
d["target"] = GLTFDocument::ARRAY_BUFFER;
}
ERR_FAIL_COND_V(!d.has("buffer"), ERR_INVALID_DATA);
ERR_FAIL_COND_V(!d.has("byteLength"), ERR_INVALID_DATA);
buffers.push_back(d);
}
print_verbose("glTF: Total buffer views: " + itos(p_state->buffer_views.size()));
if (!buffers.size()) {
return OK;
}
p_state->json["bufferViews"] = buffers;
return OK;
}
Error GLTFDocument::_parse_buffer_views(Ref<GLTFState> p_state) {
if (!p_state->json.has("bufferViews")) {
return OK;
}
const Array &buffers = p_state->json["bufferViews"];
for (GLTFBufferViewIndex i = 0; i < buffers.size(); i++) {
const Dictionary &d = buffers[i];
Ref<GLTFBufferView> buffer_view;
buffer_view.instantiate();
ERR_FAIL_COND_V(!d.has("buffer"), ERR_PARSE_ERROR);
buffer_view->buffer = d["buffer"];
ERR_FAIL_COND_V(!d.has("byteLength"), ERR_PARSE_ERROR);
buffer_view->byte_length = d["byteLength"];
if (d.has("byteOffset")) {
buffer_view->byte_offset = d["byteOffset"];
}
if (d.has("byteStride")) {
buffer_view->byte_stride = d["byteStride"];
}
if (d.has("target")) {
const int target = d["target"];
buffer_view->indices = target == GLTFDocument::ELEMENT_ARRAY_BUFFER;
buffer_view->vertex_attributes = target == GLTFDocument::ARRAY_BUFFER;
}
p_state->buffer_views.push_back(buffer_view);
}
print_verbose("glTF: Total buffer views: " + itos(p_state->buffer_views.size()));
return OK;
}
Error GLTFDocument::_encode_accessors(Ref<GLTFState> p_state) {
Array accessors;
for (GLTFAccessorIndex i = 0; i < p_state->accessors.size(); i++) {
Dictionary d;
Ref<GLTFAccessor> accessor = p_state->accessors[i];
d["componentType"] = accessor->component_type;
d["count"] = accessor->count;
d["type"] = _get_accessor_type_name(accessor->accessor_type);
d["normalized"] = accessor->normalized;
d["max"] = accessor->max;
d["min"] = accessor->min;
if (accessor->buffer_view != -1) {
// bufferView may be omitted to zero-initialize the buffer. When this happens, byteOffset MUST also be omitted.
d["byteOffset"] = accessor->byte_offset;
d["bufferView"] = accessor->buffer_view;
}
if (accessor->sparse_count > 0) {
Dictionary s;
s["count"] = accessor->sparse_count;
Dictionary si;
si["bufferView"] = accessor->sparse_indices_buffer_view;
si["componentType"] = accessor->sparse_indices_component_type;
if (accessor->sparse_indices_byte_offset != -1) {
si["byteOffset"] = accessor->sparse_indices_byte_offset;
}
ERR_FAIL_COND_V(!si.has("bufferView") || !si.has("componentType"), ERR_PARSE_ERROR);
s["indices"] = si;
Dictionary sv;
sv["bufferView"] = accessor->sparse_values_buffer_view;
if (accessor->sparse_values_byte_offset != -1) {
sv["byteOffset"] = accessor->sparse_values_byte_offset;
}
ERR_FAIL_COND_V(!sv.has("bufferView"), ERR_PARSE_ERROR);
s["values"] = sv;
ERR_FAIL_COND_V(!s.has("count") || !s.has("indices") || !s.has("values"), ERR_PARSE_ERROR);
d["sparse"] = s;
}
accessors.push_back(d);
}
if (!accessors.size()) {
return OK;
}
p_state->json["accessors"] = accessors;
ERR_FAIL_COND_V(!p_state->json.has("accessors"), ERR_FILE_CORRUPT);
print_verbose("glTF: Total accessors: " + itos(p_state->accessors.size()));
return OK;
}
String GLTFDocument::_get_accessor_type_name(const GLTFAccessor::GLTFAccessorType p_accessor_type) {
if (p_accessor_type == GLTFAccessor::TYPE_SCALAR) {
return "SCALAR";
}
if (p_accessor_type == GLTFAccessor::TYPE_VEC2) {
return "VEC2";
}
if (p_accessor_type == GLTFAccessor::TYPE_VEC3) {
return "VEC3";
}
if (p_accessor_type == GLTFAccessor::TYPE_VEC4) {
return "VEC4";
}
if (p_accessor_type == GLTFAccessor::TYPE_MAT2) {
return "MAT2";
}
if (p_accessor_type == GLTFAccessor::TYPE_MAT3) {
return "MAT3";
}
if (p_accessor_type == GLTFAccessor::TYPE_MAT4) {
return "MAT4";
}
ERR_FAIL_V("SCALAR");
}
GLTFAccessor::GLTFAccessorType GLTFDocument::_get_accessor_type_from_str(const String &p_string) {
if (p_string == "SCALAR") {
return GLTFAccessor::TYPE_SCALAR;
}
if (p_string == "VEC2") {
return GLTFAccessor::TYPE_VEC2;
}
if (p_string == "VEC3") {
return GLTFAccessor::TYPE_VEC3;
}
if (p_string == "VEC4") {
return GLTFAccessor::TYPE_VEC4;
}
if (p_string == "MAT2") {
return GLTFAccessor::TYPE_MAT2;
}
if (p_string == "MAT3") {
return GLTFAccessor::TYPE_MAT3;
}