| This sample demonstrates how to use OpenGL ES 3.0 from JNI/native code. |
| |
| The sample can be built two different ways: |
| * Compatible with API level 11 and later [*1] |
| * Require API level 18 or later. |
| Both versions include an OpenGL ES 2.0 fallback path for devices that don't |
| support OpenGL ES 3.0. |
| |
| To build and install the sample: |
| $ ln -s AndroidManifest-$N.xml AndroidManifest.xml |
| $ ln -s Android-$N.mk jni/Android.mk |
| $ $ANDROID_SDK/tools/android update project --path . --target android-$N |
| $ ../../ndk-build |
| $ ant debug |
| $ adb install bin/GLES3JNIActivity-debug.apk |
| where $N is '11' or '18' and |
| ANDROID_SDK is the root of your SDK installation. |
| |
| The OpenGL ES 3.0 rendering path uses a few new features compared to the |
| OpenGL ES 2.0 path: |
| |
| * Instanced rendering and vertex attribute divisor to reduce the number of |
| draw calls and uniform changes. |
| * Vertex array objects to reduce the number of calls required to set up |
| vertex attribute state on each frame. |
| * Explicit assignment of attribute locations, eliminating the need to query |
| assignments. |
| |
| |
| [*1] The only dependency on API level 11 is the call to |
| setEGLContextClientVersion in GLES3JNIView. With a custom |
| EGLConfigChooser and EGLContextFactory the sample would be compatible |
| with older API levels. |
