Direct X 11 vs. LibGCM
All of which brings us on quite nicely to the development environments accompanying the new hardware. It's business as usual for Microsoft, expanding on the existing Visual Studio tools used to create current-gen Xbox 360 titles. The switch from PowerPC to 64-bit x86 processors sees the introduction of a number of new extensions designed to leverage the new hardware, while the customised version of DX9 utilised by 360 gives way to a similarly enhanced DX11.
From what we've heard, it should be a seamless transition for developers (especially those who've worked with DX11 on prior PC projects) and while some appear to be worried that being locked to the Microsoft API will be an issue, the fact is that there are specific DX11 functions available to devs tied into the custom Durango hardware. There's also a level of flexibility in how DirectX is used that is equivalent to the almost legendary concept of "coding to the metal". For example, on Xbox 360, Microsoft allow developers to load shader constant data into the GPU in its native form. Devs point the hardware to the data and it loads it - the challenge is to ensure it's in the right place, in the right format before the GPU gets to it. Strictly speaking, it's still working within the DirectX API, but effectively, developers are writing to the hardware directly.
With regards the next-generation PlayStation, developers are highly unlikely to have the same kind of issues with the toolchain that they had with PS3. Having acquired SN Systems back in 2005, principally to improve the development environment for their consoles, we're told that the quality of the tools has increased exponentially to the point where one highly experienced game-maker we spoke to rates the PlayStation Vita tools as the most impressive he's used.
With Orbis, Sony is using a new variant of the LibGCM library, which has also been utilised in PS3 and Vita. This allows developers to more directly address the hardware, so elements of the AMD graphics hardware in particular can be accessed in a manner where there is no direct correlation in DirectX. You only need to look at games like God of War and Uncharted to see what Sony's approach to exploiting its hardware can produce: these remain state-of-the-art video games to this day, despite utilising graphics hardware directly derived from now-obsolete vintage 2005 Nvidia graphics hardware. Of course, with PS3 in particular, the GPU is only one part of the overall hardware offering, but the fact remains that developers are extracting performance from RSX that could only have been dreamed of when the console was designed.