RenderingPipeline

from geometry to pixels

OpenGL

First hints of OpenGL 4 on MacOS X?

No Mac currently supports more than OpenGL 3.2 even tho all current Macs could support OpenGL 4.x. Apple doesn’t comment on this situation but it seems, that at least some features of newer GL versions made it into the drivers. The lastest GLSL version MacOS supports is 150, at least that’s what glGetString(GL_SHADING_LANGUAGE_VERSION) tells us. […]

 

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Which GPUs support OpenGL ES 3.0?

With OpenGL ES 3 (codename Halti) was just released, the question arrises who will be the first to provide hardware support in there mobile GPUs. In fact, there are already some chips in the pipeline that support all the features necessary so we could see full ES3 support soon: PowerVR Series5 SGX545 from ImgTec, announced […]

 

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OpenGL 4.3 released

In addition to OpenGL ES 3.0 Khronos also released OpenGL 4.3 today. The latest incarnation of the desktop variant of this rendering API comes with some surprises. OpenGL 4.1 added ES 2 compatibility, so from 2010 onwards GL was a superset of the embedded version. While ES 3 is based on GL 3.3 (without geometry […]

 

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OpenGL ES 3.0 – Halti has arrived

Khronos just released the specs for OpenGL ES 3.0 during Siggraph earlier today. Rumors  were going on for some time and Khronos announced that they will release something. Back in May I wrote “The best thing we can hope for is a clean rewrite of the specification text and OpenGL ES 3.0 – ideally in the same […]

 

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MacOS X OpenGL driver bugs

Once in a while I run across a bug in Apples OpenGL implementation. Providing an up-to-date and performant OpenGL implementation is not an easy task, and you have to wonder why Apple tries to do this on there own and not letting Intel, NVidia and AMD provide the drivers as they do on Windows and […]

 

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Mac OpenGL capabilities

The latest MacBook Pro just got a GeForce 650M – a Kepler based GPU. This chip is not only capable of delivering OpenGL 4.2 but also shiny new features like bindless textures: one way of supporting Virtual Texturing in hardware and maybe something we will see in some form in OpenGL 5.0. This makes it […]

 

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Windowless OpenGL on MacOS X

As it turns out, windowless OpenGL applications are not only possible on Linux, but also on MacOS X – and it’s quite simple to set up. But first a little bit of background about OpenGL on Apple: At the lowest layer, OpenGL is handled by CGL (Core OpenGL), based on top of that are AGL […]

 

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Windowless OpenGL

OpenGL without a window can be useful for a couple of things: Console based OpenGL capability queries, (remote) rendering of movies, automated testing etc. OpenGL itself does not define how a context gets created, this functionality is provided by various window toolkits which normally don’t support the creation of a OpenGL context without a window. […]

 

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[NSOpenGLContext flushBuffer] might not do what you think

OpenGL on MacOS X has some problems with bugs and missing support of newer features. Sadly, even the Cocoa part of the 3D API (which gets defined by Apple, not the ARB) has some quirks. [NSOpenGLContext flushBuffer] is used to swap the backbuffer to the front in double buffered applications, in single buffered apps it […]

 

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The sad state of OpenGL on MacOS X

If you want to do hardware-accelerated 3D graphics on Macs, your only option is OpenGL, which is fine except for a few Mac-specific problems: Outdated OpenGL support: Did MacOS X ever have up-to-date OpenGL support? With MacOS X 10.7 Lion OpenGL 3.2 support was added to Apples operating system. Till then only OpenGL 2.1 was […]

 

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