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gltfio: Introduce the asynchronous API and use it.

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We were already using jobs for decoding PNG and JPEG files, but we were
doing a join. This add three methods to ResourceLoader that allow
clients to amortize the decoding process across multiple frames, even on
single-threaded platforms like WebGL.

This PR adds async loading to the following demos:
- samples/gltf_viewer (now shows a progress bar in the UI)
- android/sample-gltf-viewer
- web/samples/helmet.html

Fixes #1876.
This commit is contained in:
Philip Rideout
2020-01-29 11:23:14 -08:00
parent 503e66790b
commit c681cd243a
9 changed files with 280 additions and 77 deletions
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22
android/gltfio-android/src/main/cpp/ResourceLoader.cpp
View File

@@ -76,3 +76,25 @@ Java_com_google_android_filament_gltfio_ResourceLoader_nLoadResources(JNIEnv*, j
FilamentAsset* asset = (FilamentAsset*) nativeAsset;
loader->loadResources(asset);
}
extern "C" JNIEXPORT jboolean JNICALL
Java_com_google_android_filament_gltfio_ResourceLoader_nAsyncBeginLoad(JNIEnv*, jclass,
jlong nativeLoader, jlong nativeAsset) {
ResourceLoader* loader = (ResourceLoader*) nativeLoader;
FilamentAsset* asset = (FilamentAsset*) nativeAsset;
return loader->asyncBeginLoad(asset);
}
extern "C" JNIEXPORT jfloat JNICALL
Java_com_google_android_filament_gltfio_ResourceLoader_nAsyncGetLoadProgress(JNIEnv*, jclass,
jlong nativeLoader) {
ResourceLoader* loader = (ResourceLoader*) nativeLoader;
return loader->asyncGetLoadProgress();
}
extern "C" JNIEXPORT void JNICALL
Java_com_google_android_filament_gltfio_ResourceLoader_nAsyncUpdateLoad(JNIEnv*, jclass,
jlong nativeLoader) {
ResourceLoader* loader = (ResourceLoader*) nativeLoader;
loader->asyncUpdateLoad();
}