mirror of
https://git.mirrors.martin98.com/https://github.com/syoyo/tinygltf.git
synced 2025-10-16 18:51:32 +08:00
generic extension support
Two issues remaining: - The lights data exists twice on export; once outside of the gltf specification and once in the extensions. - A lot of objects are still missing the extensions property.
This commit is contained in:
Selmar
GitHub
parent
4f0b893d73
commit
09d2ff12d8
241
tiny_gltf.h
241
tiny_gltf.h
@ -385,6 +385,7 @@ using ColorValue = std::array<double, 4>;
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#endif
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typedef std::map<std::string, Parameter> ParameterMap;
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typedef std::map<std::string, ParameterMap> ExtensionMap;
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struct AnimationChannel {
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int sampler; // required
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@ -472,8 +473,8 @@ struct Material {
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ParameterMap values; // PBR metal/roughness workflow
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ParameterMap additionalValues; // normal/occlusion/emissive values
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ParameterMap extCommonValues; // KHR_common_material extension
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ParameterMap extPBRValues;
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ExtensionMap extensions;
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Value extras;
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};
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@ -556,7 +557,7 @@ struct PerspectiveCamera {
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,
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znear(0.0f) {}
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ParameterMap extensions;
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ExtensionMap extensions;
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Value extras;
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};
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@ -568,7 +569,7 @@ struct OrthographicCamera {
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OrthographicCamera() : xmag(0.0f), ymag(0.0f), zfar(0.0f), znear(0.0f) {}
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ParameterMap extensions;
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ExtensionMap extensions;
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Value extras;
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};
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@ -581,7 +582,7 @@ struct Camera {
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Camera() {}
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ParameterMap extensions;
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ExtensionMap extensions;
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Value extras;
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};
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@ -611,7 +612,7 @@ typedef struct {
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std::vector<Primitive> primitives;
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std::vector<double> weights; // weights to be applied to the Morph Targets
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std::vector<std::map<std::string, int> > targets;
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ParameterMap extensions;
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ExtensionMap extensions;
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Value extras;
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} Mesh;
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@ -632,8 +633,8 @@ class Node {
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matrix = rhs.matrix;
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weights = rhs.weights;
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extensions = rhs.extensions;
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extras = rhs.extras;
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extLightsValues = rhs.extLightsValues;
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}
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~Node() {}
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@ -649,9 +650,9 @@ class Node {
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std::vector<double> translation; // length must be 0 or 3
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std::vector<double> matrix; // length must be 0 or 16
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std::vector<double> weights; // The weights of the instantiated Morph Target
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ExtensionMap extensions;
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Value extras;
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ParameterMap extLightsValues; // KHR_lights_cmn extension
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};
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typedef struct {
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@ -667,7 +668,7 @@ typedef struct {
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std::string generator;
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std::string minVersion;
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std::string copyright;
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ParameterMap extensions;
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ExtensionMap extensions;
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Value extras;
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} Asset;
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@ -675,8 +676,8 @@ struct Scene {
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std::string name;
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std::vector<int> nodes;
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ParameterMap extensions;
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ParameterMap extras;
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ExtensionMap extensions;
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Value extras;
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};
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struct Light {
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@ -704,6 +705,7 @@ class Model {
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std::vector<Camera> cameras;
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std::vector<Scene> scenes;
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std::vector<Light> lights;
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ExtensionMap extensions;
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int defaultScene;
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std::vector<std::string> extensionsUsed;
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@ -1629,12 +1631,83 @@ static bool ParseJSONProperty(std::map<std::string, double> *ret,
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return true;
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}
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static bool ParseParameterProperty(Parameter *param, std::string *err,
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const json &o,
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const std::string &prop, bool required) {
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double num_val;
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// A parameter value can either be a string or an array of either a boolean or
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// a number. Booleans of any kind aren't supported here. Granted, it
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// complicates the Parameter structure and breaks it semantically in the sense
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// that the client probably works off the assumption that if the string is
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// empty the vector is used, etc. Would a tagged union work?
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if (ParseStringProperty(¶m->string_value, err, o, prop, false)) {
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// Found string property.
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return true;
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} else if (ParseNumberArrayProperty(¶m->number_array, err, o, prop,
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false)) {
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// Found a number array.
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return true;
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} else if (ParseNumberProperty(&num_val, err, o, prop, false)) {
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param->number_array.push_back(num_val);
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return true;
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} else if (ParseJSONProperty(¶m->json_double_value, err, o, prop,
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false)) {
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return true;
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} else if (ParseBooleanProperty(¶m->bool_value, err, o, prop, false)) {
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return true;
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} else {
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if (required) {
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if (err) {
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(*err) += "parameter must be a string or number / number array.\n";
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}
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}
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return false;
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}
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}
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static bool ParseExtensionsProperty(ExtensionMap *ret, std::string* err, const json &o)
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{
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json::const_iterator it = o.find("extensions");
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if (it == o.end()) {
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return false;
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}
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if (!it.value().is_object()) {
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return false;
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}
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ExtensionMap extensions;
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json::const_iterator extIt = it.value().begin();
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for(; extIt != it.value().end(); extIt++)
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{
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if (!extIt.value().is_object()) continue;
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const json &values_object = extIt.value();
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json::const_iterator itVal(values_object.begin());
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json::const_iterator itValEnd(values_object.end());
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ParameterMap extValues;
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for (; itVal != itValEnd; itVal++) {
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Parameter param;
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if (ParseParameterProperty(¶m, err, values_object, itVal.key(), false)) {
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extValues[itVal.key()] = param;
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}
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}
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extensions[extIt.key()] = extValues;
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}
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if(ret) {
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(*ret) = extensions;
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}
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return true;
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}
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static bool ParseAsset(Asset *asset, std::string *err,
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const json &o) {
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ParseStringProperty(&asset->version, err, o, "version", true, "Asset");
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ParseStringProperty(&asset->generator, err, o, "generator", false, "Asset");
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ParseStringProperty(&asset->minVersion, err, o, "minVersion", false, "Asset");
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ParseExtensionsProperty(&asset->extensions, err, o);
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// Unity exporter version is added as extra here
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ParseExtrasProperty(&(asset->extras), o);
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@ -2080,46 +2153,12 @@ static bool ParseMesh(Mesh *mesh, std::string *err, const json &o) {
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// Should probably check if has targets and if dimensions fit
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ParseNumberArrayProperty(&mesh->weights, err, o, "weights", false);
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ParseExtensionsProperty(&mesh->extensions, err, o);
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ParseExtrasProperty(&(mesh->extras), o);
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return true;
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}
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static bool ParseParameterProperty(Parameter *param, std::string *err,
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const json &o,
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const std::string &prop, bool required) {
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double num_val;
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// A parameter value can either be a string or an array of either a boolean or
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// a number. Booleans of any kind aren't supported here. Granted, it
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// complicates the Parameter structure and breaks it semantically in the sense
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// that the client probably works off the assumption that if the string is
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// empty the vector is used, etc. Would a tagged union work?
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if (ParseStringProperty(¶m->string_value, err, o, prop, false)) {
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// Found string property.
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return true;
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} else if (ParseNumberArrayProperty(¶m->number_array, err, o, prop,
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false)) {
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// Found a number array.
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return true;
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} else if (ParseNumberProperty(&num_val, err, o, prop, false)) {
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param->number_array.push_back(num_val);
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return true;
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} else if (ParseJSONProperty(¶m->json_double_value, err, o, prop,
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false)) {
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return true;
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} else if (ParseBooleanProperty(¶m->bool_value, err, o, prop, false)) {
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return true;
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} else {
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if (required) {
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if (err) {
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(*err) += "parameter must be a string or number / number array.\n";
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}
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}
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return false;
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}
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}
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static bool ParseLight(Light *light, std::string *err, const json &o) {
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ParseStringProperty(&light->name, err, o, "name", false);
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ParseNumberArrayProperty(&light->color, err, o, "color", false);
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@ -2166,44 +2205,16 @@ static bool ParseNode(Node *node, std::string *err, const json &o) {
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}
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}
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ParseExtensionsProperty(&node->extensions, err, o);
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ParseExtrasProperty(&(node->extras), o);
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json::const_iterator extensions_object = o.find("extensions");
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if ((extensions_object != o.end()) &&
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extensions_object.value().is_object()) {
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const json &ext_values_object =
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extensions_object.value();
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json::const_iterator it(ext_values_object.begin());
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json::const_iterator itEnd(ext_values_object.end());
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for (; it != itEnd; it++) {
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if ((it.key().compare("KHR_lights_cmn") == 0) &&
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it.value().is_object()) {
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const json &light_values_object =
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it.value();
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json::const_iterator itVal(light_values_object.begin());
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json::const_iterator itValEnd(light_values_object.end());
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for (; itVal != itValEnd; itVal++) {
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Parameter param;
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if (ParseParameterProperty(¶m, err, light_values_object, itVal.key(),
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false)) {
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node->extLightsValues[itVal.key()] = param;
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}
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}
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}
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}
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}
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return true;
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}
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static bool ParseMaterial(Material *material, std::string *err,
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const json &o) {
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material->values.clear();
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material->extPBRValues.clear();
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material->extensions.clear();
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material->additionalValues.clear();
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json::const_iterator it(o.begin());
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@ -2226,28 +2237,6 @@ static bool ParseMaterial(Material *material, std::string *err,
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}
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}
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}
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} else if (it.key() == "extensions") {
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if (it.value().is_object()) {
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const json &extension =
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it.value();
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json::const_iterator extIt = extension.begin();
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if (!extIt.value().is_object()) continue;
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const json &values_object =
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extIt.value();
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json::const_iterator itVal(values_object.begin());
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json::const_iterator itValEnd(values_object.end());
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for (; itVal != itValEnd; itVal++) {
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Parameter param;
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if (ParseParameterProperty(¶m, err, values_object, itVal.key(),
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false)) {
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material->extPBRValues[itVal.key()] = param;
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}
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}
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}
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} else {
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Parameter param;
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if (ParseParameterProperty(¶m, err, o, it.key(), false)) {
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@ -2256,6 +2245,7 @@ static bool ParseMaterial(Material *material, std::string *err,
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}
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}
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ParseExtensionsProperty(&material->extensions, err, o);
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ParseExtrasProperty(&(material->extras), o);
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return true;
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@ -2438,6 +2428,7 @@ static bool ParsePerspectiveCamera(PerspectiveCamera *camera, std::string *err,
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camera->yfov = float(yfov);
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camera->znear = float(znear);
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ParseExtensionsProperty(&camera->extensions, err, o);
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ParseExtrasProperty(&(camera->extras), o);
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// TODO(syoyo): Validate parameter values.
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@ -2469,6 +2460,7 @@ static bool ParseOrthographicCamera(OrthographicCamera *camera,
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return false;
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}
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ParseExtensionsProperty(&camera->extensions, err, o);
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ParseExtrasProperty(&(camera->extras), o);
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camera->xmag = float(xmag);
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@ -2547,6 +2539,7 @@ static bool ParseCamera(Camera *camera, std::string *err,
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ParseStringProperty(&camera->name, err, o, "name", false);
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ParseExtensionsProperty(&camera->extensions, err, o);
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ParseExtrasProperty(&(camera->extras), o);
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return true;
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@ -2667,6 +2660,7 @@ bool TinyGLTF::LoadFromString(Model *model, std::string *err, const char *str,
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model->nodes.clear();
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model->extensionsUsed.clear();
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model->extensionsRequired.clear();
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model->extensions.clear();
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model->defaultScene = -1;
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// 1. Parse Asset
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@ -2856,6 +2850,9 @@ bool TinyGLTF::LoadFromString(Model *model, std::string *err, const char *str,
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}
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scene.nodes = nodesIds;
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ParseExtensionsProperty(&scene.extensions, err, o);
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ParseExtrasProperty(&scene.extras, o);
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model->scenes.push_back(scene);
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}
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}
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@ -3082,6 +3079,9 @@ bool TinyGLTF::LoadFromString(Model *model, std::string *err, const char *str,
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}
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// 17. Parse Extensions
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ParseExtensionsProperty(&model->extensions, err, v);
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// 18. Specific extension implementations
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{
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json::const_iterator rootIt = v.find("extensions");
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if ((rootIt != v.end()) && rootIt.value().is_object()) {
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@ -3207,7 +3207,7 @@ bool TinyGLTF::LoadBinaryFromMemory(Model *model, std::string *err,
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memcpy(&model_format, bytes + 16, 4);
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swap4(&model_format);
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if ((20 + model_length >= size) || (model_length < 1) ||
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if ((20 + model_length > size) || (model_length < 1) || // specification allows a GLB file with no bin buffer
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(model_format != 0x4E4F534A)) { // 0x4E4F534A = JSON format.
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if (err) {
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(*err) = "Invalid glTF binary.";
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@ -3369,6 +3369,20 @@ static void SerializeParameterMap(ParameterMap ¶m, json &o) {
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}
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}
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static void SerializeExtensionMap(ExtensionMap &extensions, json &o)
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{
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if(!extensions.size())
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return;
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json extMap;
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for(ExtensionMap::iterator extIt = extensions.begin(); extIt != extensions.end(); ++extIt) {
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json extension_values;
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SerializeParameterMap(extIt->second, extension_values);
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extMap[extIt->first] = extension_values;
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}
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o["extensions"] = extMap;
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}
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static void SerializeGltfAccessor(Accessor &accessor, json &o) {
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SerializeNumberProperty<int>("bufferView", accessor.bufferView, o);
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@ -3458,6 +3472,8 @@ static void SerializeGltfAsset(Asset &asset, json &o) {
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if (asset.extras.Keys().size()) {
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SerializeValue("extras", asset.extras, o);
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}
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SerializeExtensionMap(asset.extensions, o);
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}
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static void SerializeGltfBuffer(Buffer &buffer, json &o,
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@ -3492,14 +3508,7 @@ static void SerializeGltfImage(Image &image, json &o) {
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}
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static void SerializeGltfMaterial(Material &material, json &o) {
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if (material.extPBRValues.size()) {
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// Serialize PBR specular/glossiness material
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json values;
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SerializeParameterMap(material.extPBRValues, values);
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json extension;
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o["extensions"] = extension;
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}
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SerializeExtensionMap(material.extensions, o);
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if (material.values.size()) {
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json pbrMetallicRoughness;
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@ -3593,14 +3602,7 @@ static void SerializeGltfNode(Node &node, json &o) {
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SerializeNumberProperty<int>("camera", node.camera, o);
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}
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if (node.extLightsValues.size()) {
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json values;
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SerializeParameterMap(node.extLightsValues, values);
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json lightsExt;
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lightsExt["KHR_lights_cmn"] = values;
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o["extensions"] = lightsExt;
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}
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SerializeExtensionMap(node.extensions, o);
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SerializeStringProperty("name", node.name, o);
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SerializeNumberArrayProperty<int>("children", node.children, o);
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@ -3659,6 +3661,10 @@ static void SerializeGltfScene(Scene &scene, json &o) {
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if (scene.name.size()) {
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SerializeStringProperty("name", scene.name, o);
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}
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if (scene.extras.Keys().size()) {
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SerializeValue("extras", scene.extras, o);
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}
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SerializeExtensionMap(scene.extensions, o);
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}
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static void SerializeGltfSkin(Skin &skin, json &o) {
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@ -3848,6 +3854,9 @@ bool TinyGLTF::WriteGltfSceneToFile(
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}
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output["cameras"] = cameras;
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// EXTENSIONS
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SerializeExtensionMap(model->extensions, output);
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// LIGHTS
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json lights;
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for (unsigned int i = 0; i < model->lights.size(); ++i) {
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