[Impeller] Add docs to detail RenderDoc frame captures (flutter/engine#36815)

This commit is contained in:
Kaushik Iska
2022-10-17 17:45:04 -05:00
committed by GitHub
parent 9be6a7eaa3
commit ec786ccdc8
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FILE: ../../../flutter/impeller/display_list/nine_patch_converter.h
FILE: ../../../flutter/impeller/display_list/vertices_converter.cc
FILE: ../../../flutter/impeller/display_list/vertices_converter.h
FILE: ../../../flutter/impeller/docs/assets/launch-app.png
FILE: ../../../flutter/impeller/docs/assets/read_frame_captures/image1.png
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FILE: ../../../flutter/impeller/docs/assets/render-doc-capture.png
FILE: ../../../flutter/impeller/docs/assets/shader_pipeline.png
FILE: ../../../flutter/impeller/docs/assets/showcase.png
FILE: ../../../flutter/impeller/docs/assets/xcode_frame_capture/image1.png

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@@ -182,6 +182,7 @@ To your `AndroidManifest.xml` file, add under the `<application>` tag:
* [Frequently Asked Questions](docs/faq.md)
* [Impellers Coordinate System](docs/coordinate_system.md)
* [How to Setup Xcode for GPU Frame Captures with Metal.](docs/xcode_frame_capture.md)
* [How to Setup RenderDoc Frame Captures with Vulkan.](docs/renderdoc_frame_capture.md)
* [Learning to Read GPU Frame Captures](docs/read_frame_captures.md)
* [How to Enable Metal Validation for Command Line Apps.](docs/metal_validation.md)
* [How Impeller Works Around The Lack of Uniform Buffers in Open GL ES 2.0.](docs/ubo_gles2.md)

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# Frame Capture with RenderDoc
[RenderDoc](https://renderdoc.org/) is a graphics debugger that can be used to capture frames. With Impeller starting to support gles and Vulkan backends, RenderDoc can provide insights into the application's frames.
1. First step is to setup RenderDoc. Follow the instructions [here](https://renderdoc.org/docs/getting_started/quick_start.html). For the purposes of this guide it is assumed that you are able to get RenderDoc running.
2. The next step would be to run the application you wish the capture the frames of. Typically these would be one of the playground tests. To build these, do:
```bash
# In your $ENGINE_SRC folder, do:
./flutter/tools/gn --unopt --no-lto --enable-impeller-playground\
--enable-impeller-vulkan --target-dir host_debug_impeller_vulkan
autoninja -C out/host_debug_impeller_vulkan/
```
3. Start RenderDoc, and click the "Launch Application" button.
<img src="assets/launch-app.png" height="200" />
4. Fill out the following parameters, and click launch:
- executable: `$ENGINE_SRC/out/host_debug_impeller_vulkan/impeller_unittests` (expand `ENGINE_SRC`).
- args: `--gtest_filter="*CanDrawRect/Vulkan*"`
- working dir: `$ENGINE_SRC` (expand `ENGINE_SRC`)
5. For the frame you wish to capture, press `F12`, you will now be able to see the frame capture and inspect the state.
<img src="assets/render-doc-capture.png" />