# GAPID

![](https://developers.google.com/static/vr/images/tools/gapid-hero-image.png)

GAPID is a Graphics API Debugger.

Use GAPID to diagnose GPU issues when developing graphical applications.

GAPID lets you capture, inspect, and adjust traces of your app's graphics
driver calls. This helps you to:

- Identify rendering issues, such as missing objects or object size and texture problems.
- Inspect the resources loaded by the graphics API.
- Make adjustments to resources like shaders or commands and observe the results live.

## Supported platforms and APIs

|   | Android | Windows | macOS | Linux |
|---|---|---|---|---|
| **OpenGL ES Trace** | ✔ |   |   |   |
| **OpenGL ES Replay** |   | ✔ | ✔ | ✔ |
| **Vulkan Trace** | ✔ | ✔ |   | ✔ |
| **Vulkan Replay** (Must be performed on the same device used to trace) | ✔ | ✔ |   | ✔ |

## The GAPID interface

![](https://developers.google.com/static/vr/images/tools/gapid-ui.png)

The GAPID interface lets you analyze resources and commands when investigating
issues.

**Rendering context and frames**   

Select a rendering context to see frames in a film-strip view.

**Commands**   

Review graphics API calls made by the application, grouped by frame and draw
call or by user markers.

**Framebuffer**   

Pinpoint the source of rendering errors by viewing the contents of the
currently bound framebuffer.

**Geometry**   

View the pre-transformed mesh of a selected draw call.
Rotate or zoom in on the model. Change the rendering mode to investigate issues
or export a model as an `.obj` file.

**Textures**   

See all of the texture resources created up to and including
a selected command.

**Shaders**   

View and iterate on shaders in your application. See all:

- Shaders created by the program
- Linked Vertex/Fragment programs
- Bound uniform values

Edit your shaders and see the results directly within GAPID.

**Report**   

Review a log of issues, including incorrect API usage or problems that GAPID
encounters while replaying your graphics trace.

**State**   

See the driver state immediately after executing a selected command.

## Download and start using GAPID

- Download GAPID from the [GAPID releases page on GitHub](https://github.com/google/gapid/releases/).
- Learn more [about using GAPID](https://google.github.io/gapid/about/).
- See [GAPID on GitHub](https://github.com/google/gapid) for details on cloning and building GAPID.