[OpenGL and Vulkan Interoperability on Linux] Part 3: Using OpenGL to display Vulkan allocated textures.

This is the third post of the OpenGL and Vulkan interoperability series, where I explain some EXT_external_objects and EXT_external_objects_fd use cases with examples taken by the Piglit tests I’ve written to test the extensions as part of my work for Igalia‘s graphics team.

We are going to see a slightly more complex case of Vulkan/GL interoperability where an image is allocated and filled using Vulkan and then it is displayed using OpenGL. This case is implemented in Piglit’s vk-image-display test for a 2D RGBA texture (which is one of the most commonly used texture types).

Remember that the code for the test and the Vulkan helper/framework functions as well as the interoperability functions is in tests/spec/ext_external_objects/ Piglit directory.

Continue reading [OpenGL and Vulkan Interoperability on Linux] Part 3: Using OpenGL to display Vulkan allocated textures.

[OpenGL and Vulkan Interoperability on Linux] Part 2: Using OpenGL to draw on Vulkan textures.

This is the second post of the OpenGL and Vulkan interoperability series, where I explain some EXT_external_objects and EXT_external_objects_fd use cases with examples taken by the Piglit tests I’ve written to test the extensions as part of my work for Igalia‘s graphics team.

We are going to see a very simple case of Vulkan/GL interoperability where an image is allocated using Vulkan and filled using OpenGL. This case is implemented in Piglit’s vk-image-overwrite test for images of different formats.

Continue reading [OpenGL and Vulkan Interoperability on Linux] Part 2: Using OpenGL to draw on Vulkan textures.

[OpenGL and Vulkan Interoperability on Linux] Part 1: Introduction

It’s been a while that Igalia’s graphics team had been working on the OpenGL extensions that provide the mechanisms for OpenGL and Vulkan interoperability in the Intel iris (gallium3d) driver that is part of mesa.

As there were no conformance tests (CTS) for this extension, and we needed to test it, we have written (and we are still writing) small tests for piglit that allow the exchange and the synchronization of the exchange of resources such as buffers, textures, and depth or stencil buffers.

Continue reading [OpenGL and Vulkan Interoperability on Linux] Part 1: Introduction

Vkrunner allows specifying the required Vulkan version

The required Vulkan implementation version for a Vkrunner shader test can now be specified in its [require] section. Tests that are targeting Vulkan versions that aren’t supported by the device driver will be skipped.

Continue reading Vkrunner allows specifying the required Vulkan version

Having fun with Vkrunner!

Vkrunner is a Vulkan shader testing tool similar to Piglit, written by Neil Roberts. It is mostly used by graphics drivers developers, and was also part of the official Khronos conformance tests suite repository (VK-GL-CTS) for some time [1]. There are already posts [2] about its use but they are all written from a driver developer’s perspective and focus on vkrunner’s debugging capabilities. In this post, I’m going to show you an alternative use I’ve found for it, in order to have fun with pixel shaders during my holidays! 🙂

Continue reading Having fun with Vkrunner!