Use hosted images for the anniversary post

_posts/2019-06-12-anniversary-5.md

@@ -5,19 +5,17 @@ title: 5 Year Anniversary
 
 [gfx-rs](https://github.com/gfx-rs) project started with a simple idea: separate the API-specific logic of interaction with the graphic driver from a Rust application. That idea was brewing in the heads of [@kvark](https://github.com/kvark) and [@bjz](https://github.com/brendanzab) precisely 5 years ago, when they realized the common goal and kicked off the project. The Rust game dev community at the time consisted of a few prominent projects (like [kiss3d](https://github.com/sebcrozet/kiss3d), [claymore](https://github.com/kvark/claymore-game), and [q3](https://github.com/jeaye/q3)) driven by individuals. They used [gl-rs](https://github.com/brendanzab/gl-rs) for rendering with no strong separation between higher levels, built as mostly monolithic systems. Because GL was known to keep the CPU occupied on the owning thread, we wanted to provide a separate thread dedicated to talking to the GPU. We had a lot to learn, some great contributors to meet, and hoped to eventually make Rust ecosystem a better place.
 
-Our team (or rather, project community) grew quickly, and so did the feature scope of the project. Not only did we want to provide a graphics API, we also wanted to make it safe by removing the context from user actions. Instead of relying on the last texture bound, we required the user to provide the whole batch context with all data that was needed by the GPU. This ensured that redundant state changes could be avoided entirely. This lead us to exploration of macros and eventually the concept of [gfx pipeline](http://gfx-rs.github.io/2016/01/22/pso.html). The threading model started with 2 implicitly created threads ("device thread" and "render thread"), moving to one (just "device thread"), and eventually zero with the introduction of command buffers. Users where able to make a lot of shiny things with our API:
+Our team (or rather, project community) grew quickly, and so did the feature scope of the project. Not only did we want to provide a graphics API, we also wanted to make it safe by removing the context from user actions. Instead of relying on the last texture bound, we required the user to provide the whole batch context with all data that was needed by the GPU. This ensured that redundant state changes could be avoided entirely. This lead us to exploration of macros and eventually the concept of [gfx pipeline](http://gfx-rs.github.io/2016/01/22/pso.html). The threading model started with 2 implicitly created threads ("device thread" and "render thread"), moving to one (just "device thread"), and eventually zero with the introduction of command buffers. Users were able to make a lot of shiny things with our API:
 
-![hematite](https://github.com/PistonDevelopers/hematite/raw/a891a8c151a498df80e97cce2a97851aba8d65f4/screenshot.png)
-![some game](https://camo.githubusercontent.com/f59e1651986bf54fa02f18c64092db8b3ee9502f/687474703a2f2f696d6167652e70726e747363722e636f6d2f696d6167652f32663165633564343737653034326464613263323933323363396634396162342e706e67)
-![zone of control](https://camo.githubusercontent.com/fb8c95650fba27061e58e76f17ff8460a41b3312/687474703a2f2f692e696d6775722e636f6d2f504f68534c77682e706e67)
+![hematite](/img/prell-shot1.png) ![some game](/img/prell-shot2.png) ![zone of control](/img/prell-shot3.png)
 
 Growing a safe and opaque API also allowed us to explore targeting other graphics backends beyond OpenGL. We launched initiatives of bringing D3D11, Metal, WebGL, and eventually started looking at Vulkan. At the time, more and more users started to become interested in gfx-rs or port their project to it. The Rust ecosystem noticed some shortcomings of the gfx-rs API, but needed something decent to use. As we grew a better understanding of how the GPU hardware worked, what low-level APIs were, and why they were introduced, we realized that merely providing a Vulkan backend would not allow for the performance that low-level APIs are made for. We anticipated some things right: device abstraction, command buffers, but we missed some others: render passes, resource lifetimes, pools. At this time of conceptual crisis we were lucky to meet [@msiglreith](https://github.com/msiglreith) who started driving the project into the [low level](http://gfx-rs.github.io/2017/07/24/low-level.html) territory with unhuman persistence.
 
 Eventually, the old gfx-rs was moved out into the [pre-ll branch](https://github.com/gfx-rs/gfx/tree/pre-ll) (for "pre low-level"), and we re-focused the effort on the low-level branch, which became the new `master`. These were the dark times for the project and community: times of confusion, failed expectations, lack of visible progress, and constant re-learning. The ecosystem, however, didn't have a proper replacement for gfx-rs: `glium` was losing activity, `vulkano` was young and non-portable to macs and some windows machines, and `luminance` was GL only. Even when we reached certain level of polish with the low-level implementation, which worked in a basic form on Vulkan, D3D12, and Metal, its API was too unstable and complex for serious applications...
 
-After long discussions about the API concepts to expose, we decided to just follow Vulkan verbatim, trusting the Khronos working group to make the informed design choices. We started a Vulkan Portability implementation based on gfx-rs, reworked the Metal and D3D12 backends, and eventually became ready to run production applications like [Dota2](http://gfx-rs.github.io/2018/08/10/dota2-macos-performance.html) and [Dolphin Emulator](http://gfx-rs.github.io/2019/03/22/doplhin-macos-performance.html). This was a great success, an experimental confirmation that mapping from Vulkan is feasible. By the end of 2018 we managed to [release hal-0.1](http://gfx-rs.github.io/2018/12/27/this-year.html) on crates.io, as an invitation for the Rust community to look at it seriously.
+After long discussions about the API concepts to expose, we decided to just follow Vulkan verbatim, trusting the Khronos working group to make the informed design choices. We started a Vulkan Portability implementation based on gfx-rs, reworked the Metal and D3D12 backends, and eventually became ready to run production applications like [Dota2](http://gfx-rs.github.io/2018/08/10/dota2-macos-performance.html) and [Dolphin Emulator](http://gfx-rs.github.io/2019/03/22/dolphin-macos-performance.html). This was a great success, an experimental confirmation that mapping from Vulkan is feasible. By the end of 2018 we managed to [release hal-0.1](http://gfx-rs.github.io/2018/12/27/this-year.html) on crates.io, as an invitation for the Rust community to look at it seriously.
 
-![gfx-hal structure](https://github.com/gfx-rs/gfx/raw/4090c754fffffdc771aa9a26bcb352fc095c29f3/info/hal.svg)
+![gfx-hal structure](/img/hal-structure.png)
 
 There was still a missing elephant in the room: what API can we *recommend* for Rust developers? gfx-hal was obviously hard and only accessible to experts. A lot of attempts to build higher level abstractions [failed](https://github.com/gfx-rs/gfx-render) under the complexity of the task. Eventually though, a sole effort of [omni-viral](https://github.com/omni-viral) saw the light of success, and today his [Rendy](https://github.com/amethyst/rendy) project is a state of art "build your own engine" kit on top of gfx-hal. In the meantime, another interesting opportunity appeared on the horison: WebGPU was shaping up to be a simple, portable, yet modern and safe graphics/compute API, and we wanted to implement it. The safety guarantee seemed like a perfect match for a Rust API, and so did the level of abstraction chosen by the W3C working group, which we (gfx-rs community) were participating in. The idea was to develop a Rust library that exposed this safe API to both the native users and Gecko internals as an implementation detail, and that's how [wgpu-rs](http://gfx-rs.github.io/2019/03/06/wgpu.html) emerged.