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Mac OS X has used hardware compositing since the introduction of Quartz Extreme into Mac OS X 10.2. To improve performance, each program draws to its own independent memory buffer instead of to a slow graphical subsystem. (In Windows Vista, each hardware overlay is more correctly known as a Direct3D surface).
Video random-access memory (VRAM) is dedicated computer memory used to store the pixels and other graphics data as a framebuffer to be rendered on a computer monitor. [1] It often uses a different technology than other computer memory, in order to be read quickly for display on a screen.
OS X Yosemite look and feel, support of Yosemite and Windows 8.1, optimized for Haswell Intel processors with performance improvements of up to 43% vs Fusion 6, allocate up to 2 Gb of video memory per virtual machine, improved support for Retina Macs® connected to non-Retina displays, energy impact reduced by 42%, automate GPU switching for ...
A common design uses a graphics library such as OpenGL or Direct3D which interfaces with the graphics driver to translate received commands to instructions for the accelerator's graphics processing unit (GPU). The GPU uses those instructions to compute the rasterized results and the results are bit blitted to the framebuffer. The framebuffer's ...
Various methods to achieve video overlay are in use: A video overlay device can be connected between the graphics card analog VGA output and the monitor's input, forming a "VGA passthrough". The device modifies the VGA signal and inserts the analog video signal overlay into the picture; the rest of the screen is filled by the signal coming from ...
Mac OS X 10.4 Tiger supports the GMA 950, since it was used in previous revisions of the MacBook, Mac mini, and 17-inch iMac. [35] It had been used in all Intel-based Mac minis until the Mac mini released on March 3, 2009). [36] Mac OS X 10.5 Leopard contains drivers for the GMA X3100, which were used in a recent revision of the MacBook range. [37]
Components of a GPU. A graphics processing unit (GPU) is a specialized electronic circuit initially designed for digital image processing and to accelerate computer graphics, being present either as a discrete video card or embedded on motherboards, mobile phones, personal computers, workstations, and game consoles.
Also, the Quadra 800 was not capable of operating at 24-bit color, regardless of the amount of VRAM installed or the use of an external video card, while the Quadra 900 and 950 were capable of 24-bit color. [3] The Quadra 950 was replaced by the PowerPC-based Power Macintosh 9500 in June 1995, with sales continuing until October. [4]