minimal steps for gfxr capture

[ramcn]

Hi Team,

I am new to this tool and trying figure out how to capture a single frame by looking at the documentation.
Here are the steps I was able to come up looking at the documentation and tried it out on the device.

1. Build and Install replay-debug.apk using adb install -g command.
2. adb shell "setprop debug.vulkan.layers.1 'VK_LAYER_LUNARG_gfxreconstruct'"
3. adb shell "setprop debug.gfxrecon.capture_frames '1-10'"
4. adb shell "setprop debug.gfxrecon.capture_file '/sdcard/Android/data//files/CurTrace.gfxr'"
5. Launch and run the vulkan app.

However, at the end of these steps, I don't see GFXR capture at /sdcard/Android/data//files/.
Am I supposed to push the libVkLayer_gfxreconstruct.so to any specific location on the device? or anything else I am missing.

PS: I don't have root access to the device.

[ramcn]

Additionally when reviewing the vulkan validation layer guidelines, I got to know that vulkan looks for the GFXR capture layer file libVkLayer_gfxreconstruct.so under /data/local/..... .

I am unable to push the libVkLayer_gfxreconstruct.so into /data/local/... without root access to the device. Because of this I see an error message "Couldn't create Vulkan instance: VK_ERROR_LAYER_NOT_PRESENT" from adb logcat.

Is there a way I can override this default vulkan path to some path under /sdcard/ and copy the libVkLayer_gfxreconstruct.so this alternate path.

[bradgrantham-lunarg]

We don't have control over the Vulkan loader so we can't change where it looks for layers or how it operates. I'm aware of these ways to capture on Android:

1. With a non-rooted device, package libVkLayer_gfxreconstruct.so with the app itself. Usually only possible if you're building the app from source.
2. If the app is "debuggable" in the manifest:

adb shell settings put global enable_gpu_debug_layers 1
adb shell settings put global gpu_debug_app $APPNAME
adb shell settings put global gpu_debug_layer_app com.lunarg.gfxreconstruct.replay

3. With a rooted device, copy libVkLayer_gfxreconstruct.so to the app's lib/arm64/ directory, making sure to chmod +x. Then set adb shell "setprop debug.vulkan.layers 'VK_LAYER_LUNARG_gfxreconstruct'" etc and run the application.