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WIP GLTF Texture assignment to materials
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This commit is contained in:
Kearwood Gilbert
2026-05-03 14:37:00 -07:00
parent 5c5402655f
commit ed036caec5
1 changed files with 62 additions and 16 deletions
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78
kraken/resources/KRResource+gltf.cpp
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@@ -68,6 +68,52 @@ KRBundle* LoadGltf(KRContext& context, simdjson::ondemand::object& jsonRoot, std
}
std::vector<KRTexture*> images;
simdjson::ondemand::array jsonImages;
if(tryJson(jsonRoot["images"].get_array().get(jsonImages))) {
for (auto jsonImage : jsonImages) {
KRTexture*& image = images.emplace_back();
image = nullptr;
std::string_view uri;
int bufferView = -1;
if (tryJson(jsonImage["uri"].get(uri))) {
if (uri.starts_with("data:")) {
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Data URI's not supported for images.");
continue;
}
std::string uriStr;
uriStr = uri;
image = context.getTextureManager()->getTexture(util::GetFileBase(uriStr));
if (image == nullptr) {
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Image with URI not found: %s", uriStr.c_str());
continue;
}
} else if (tryJson(jsonImage["bufferView"].get(bufferView))) {
std::string_view mimeType;
if(!tryJsonRequired(jsonImage["mimeType"].get(mimeType))) {
continue;
}
if (mimeType == "image/png") {
// TODO - Implement png loading from buffer view
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Loading PNG Images from a buffer view is not yet supported.");
continue;
} else if (mimeType == "image/jpeg") {
// TODO - Implement jpeg loading from buffer view
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Loading JPEG Images from a buffer view is not yet supported.");
continue;
} else {
std::string mimeTypeStr;
mimeTypeStr = mimeType;
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Image with mime type not supported: %s", mimeTypeStr.c_str());
continue;
}
} else {
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Image without uri or bufferView could not be imported.");
continue;
}
}
}
struct TextureInfo
{
std::string name;
@@ -93,8 +139,21 @@ KRBundle* LoadGltf(KRContext& context, simdjson::ondemand::object& jsonRoot, std
texture.name = std::format("{}_texture_{}", baseName, textureIndex);
}
// texture["sampler"] ...
tryJson(jsonTexture["source"].get(texture.imageIndex));
int samplerIndex = -1;
if (tryJson(jsonTexture["sampler"].get(samplerIndex))) {
KRContext::Log(KRContext::LOG_LEVEL_WARNING, "Kraken - GLTF: Sampler options not supported for texture: %s", texture.name.c_str());
// TODO - Implement texture sampler options
}
int imageIndex = -1;
if (!tryJson(jsonTexture["source"].get(imageIndex))) {
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Could not load texture without a source attribute: %s", texture.name.c_str());
continue;
}
if (imageIndex < 0 || imageIndex >= images.size()) {
KRContext::Log(KRContext::LOG_LEVEL_ERROR, "Kraken - GLTF: Could not load texture with a source index that is out of range: %s", texture.name.c_str());
continue;
}
texture.texture = images[imageIndex];
simdjson::ondemand::object extensions;
if(tryJson(jsonTexture["extensions"].get(extensions))) {
simdjson::ondemand::object textureTransform;
@@ -108,9 +167,6 @@ KRBundle* LoadGltf(KRContext& context, simdjson::ondemand::object& jsonRoot, std
}
}
simdjson::ondemand::array images;
tryJson(jsonRoot["images"].get_array().get(images));
simdjson::ondemand::array samplers;
tryJson(jsonRoot["samplers"].get_array().get(samplers));
@@ -133,16 +189,6 @@ KRBundle* LoadGltf(KRContext& context, simdjson::ondemand::object& jsonRoot, std
KRMaterial* new_material = new KRMaterial(context, std::string(materialName).c_str());
simdjson::ondemand::object pbrMetallicRoughnessObj;
if(tryJson(jsonMaterial["pbrMetallicRoughness"].get(pbrMetallicRoughnessObj))) {
/*
KRTextureBinding texture;
int texCoord{ 0 };
hydra::Vector2 scale{ 1.f, 1.f };
hydra::Vector2 offset{ 0.f, 0.f };
float rotation{ 0.f };
*/
tryJson(pbrMetallicRoughnessObj["baseColorFactor"].get(new_material->m_baseColorFactor));
simdjson::ondemand::object baseColorTextureInfo;
if(tryJson(pbrMetallicRoughnessObj["baseColorTexture"].get(baseColorTextureInfo))) {
@@ -156,7 +202,7 @@ KRBundle* LoadGltf(KRContext& context, simdjson::ondemand::object& jsonRoot, std
new_material->m_baseColorMap.scale = texture.scale;
new_material->m_baseColorMap.offset = texture.offset;
new_material->m_baseColorMap.rotation = texture.rotation;
// new_material->m_baseColorMap.texture = ...
new_material->m_baseColorMap.texture.set(texture.texture);
}
}
} // baseColorTexture