Opengl Programming On Mac Os X Architecture Performance And Integration Pdf
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- Mac OS X Graphics Architecture
- OpenGL(R) Programming on Mac OS(R) X: Architecture, Performance, and Integration
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OpenCL C 3. OpenCL provides a standard interface for parallel computing using task- and data-based parallelism. OpenCL is an open standard maintained by the non-profit technology consortium Khronos Group. OpenCL views a computing system as consisting of a number of compute devices , which might be central processing units CPUs or "accelerators" such as graphics processing units GPUs , attached to a host processor a CPU. It defines a C-like language for writing programs.
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Metal is a low-level, low-overhead hardware-accelerated 3D graphic and compute shader API created by Apple. It debuted in iOS 8. According to Apple promotional materials: "MSL [Metal Shading Language] is a single, unified language that allows tighter integration between the graphics and compute programs. Metal aims to provide low-overhead access to the GPU. Commands are encoded beforehand and then submitted to the GPU for asynchronous execution. The application controls when to wait for the execution to complete thus allowing application developers to increase throughput by encoding other commands while commands are executed on the GPU or save power by explicitly waiting for GPU execution to complete.
Mac OS X Graphics Architecture
Mac OS X, in general, is built as a layered software system. The lower layers are the ones closer to the hardware. These layers include software like hardware drivers and routines for accessing processor specific features such as AltiVec. The higher layers build upon the functionality beneath them and offer applications services that are easier to use. The challenge of the application designer is to decide at what level he needs to access the graphics system.
OpenGL(R) Programming on Mac OS(R) X: Architecture, Performance, and Integration
This difference in capabilities between the GPU and the CPU exists because they are designed with different goals in mind. While the CPU is designed to excel at executing a sequence of operations, called a thread , as fast as possible and can execute a few tens of these threads in parallel, the GPU is designed to excel at executing thousands of them in parallel amortizing the slower single-thread performance to achieve greater throughput. The GPU is specialized for highly parallel computations and therefore designed such that more transistors are devoted to data processing rather than data caching and flow control.
Apple was not an exhibitor this year but apparently the company made some type of presentation, perhaps in some other booth or in a conference session. The new and updated Quartz Compositor in Jaguar will feature double buffered windows, per-pixel alpha channels, per-window fade control, per-window transform and warp, and integrated 2D, 3D and video. The next diagram shows Quartz Extreme. Essentially everything is laid out the same only this time GPU hardware accelerates various processes, providing hardware acceleration to OpenGL apps before the initial buffer space.
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