Vulkan input attachments and sub passes

 Posted on July 19, 2018  |  Sascha

Introduction I have added a new example to my open source C++ Vulkan examples that demonstrates the use of input attachments and subpasses within a single render pass. Input attachments are image views that can be used for pixel local load operations inside a fragment shader. This basically means that framebuffer attachments written in one subpass can be read from at the exact same pixel (that they have been written) in subsequent subpasses. [Read More]
vulkan  vulkan-examples  vulkan-tutorial 

Multiview rendering in Vulkan using VK_KHR_multiview

 Posted on June 8, 2018  |  Sascha

I have added a new example to my open source C++ Vulkan examples that demonstrates the use of multiview rendering. Multiview enables rendering to multiple views simultaneously instead of having to use multiple passes. Esp. with stereoscopic rendering (e.g. for VR related applications) there’s usually little change between two views, like different matrices, and having to do multiple passes for such small differences is inefficient. With multiview an implementation can now render different views simultaneously in a single pass and the Vulkan extension even adds hints for the implementation to even further improve performance (see correlation mask down below). [Read More]
vulkan  vulkan-examples 

Vulkan 1.1 is here

 Posted on March 8, 2018  |  Sascha

A bit later than initially planned Vulkan 1.1 was released to the public yesterday, as usual with day-one driver support by most of the IHVs. Vulkan 1.1 promoted several extension to the core and also adds interesting new functionality like vendor independent subgroup operations. You can get all the details at the Khronos Vulkan landing page. Note that all my open source examples, demos and applications will work fine with Vulkan 1. [Read More]
vulkan 

Conservative rasterization in Vulkan using VK_EXT_conservative_rasterization

 Posted on March 4, 2018  |  Sascha

I have added a new example to my open source C++ Vulkan examples that demonstrates the basic use of conservative rasterization using the VK_EXT_conservative_rasterization extension. This has been missing from Vulkan some time now (while other APIs already offer this feature) but has recently been added and is already support by at least NVIDIA. Conservative rasterization changes the way fragments are generated, and enabling over estimation generates fragments for every pixel touched instead of only pixels that are fully covered. [Read More]
vulkan  vulkan-examples 

How-to video: Debugging a non-visible model in Vulkan using RenderDoc

 Posted on February 26, 2018  |  Sascha

One of the most common Vulkan related that I’m seeing a lot is about rendering stuff that somehow ends up being not visible on the screen, even though technically everything looks okay (no validation layer errors, correct buffer uploads, etc.). Luckily there are debugging tools tools like RenderDoc that can help locating and fixing such problems. But not everyone knows about such tools or how to use them for debugging these kind of problems. [Read More]
renderdoc  vulkan  vulkan-tutorial 

Vulkan glTF 2.0 C++ phyiscal based rendering

 Posted on February 11, 2018  |  Sascha

I have released the first working version of a separate (from the examples) Vulkan physical based rendering example that uses the glTF 2.0 model file format. The repository can be found at https://github.com/SaschaWillems/Vulkan-glTF-PBR. glTF is a royalty free format specification by the Khronos Group and is a new format for 3D models gaining lots of traction. With version 2.0 it also added several PBR extensions and definitions. I decided to make this a stand-alone project instead of “just” another example in my Vulkan C++ example repository to make it easier getting into the code. [Read More]
vulkan  gltf  pbr  vulkan-gltf-pbr 

New Vulkan example: Cascaded shadow mapping

 Posted on December 30, 2017  |  Sascha

In what is most probably my last Vulkan example for 2017 I have added a cascaded shadow mapping example to my open source Vulkan C++ example repository: One big problem of traditional shadow mapping, esp. with large outdoor scenes is the resolution you get as one single shadow map has to cover the whole camera spectrum. With cascaded shadow maps the frustum is split up into multiple frustums (along scene depth) with each getting it’s own, full-resolution, depth map. [Read More]
vulkan  vulkan-examples 

Combined Vulkan and OpenGL ES listing for android

 Posted on October 30, 2017  |  Sascha

Upon popular request I finally got around combining android device data from my Vulkan and OpenGL ES hardware databases into a convenient table. This should be handy if you plan on supporting both apis on Vulkan or if you just need to check for general device support. The new page can be reached via https://android.gpuinfo.org/ It combines all android device reports from the Vulkan database with all reports from the OpenGL ES database and also uses google’s official device list for translating device IDs (stored with Vulkan and OpenGL ES reports) into actual retail names. [Read More]
android  opengl-es  vulkan  opengl-es-capsviewer  opengl-capsviewer  vulkan-capsviewer  gpu-info-org