Elan Graphics is a computer graphics architecture for Silicon Graphics computer workstations. Elan Graphics was developed in 1991 and was available as a high-end graphics option on workstations released during the mid-1990s as part of the architectures family. Elan Graphics gives the workstation real-time 2D and 3D graphics rendering capability similar to that of even high-end PCs made over ten years after Elan's introduction, with the exception of texture mapping, which had to be performed in software.
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- Elan Graphics (en)
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| - Elan Graphics je architektura grafických karet používaných v počítačích společnosti Silicon Graphics. Byla vyvinuta v roce 1991 a jednalo se o high-endové grafické řešení pro počítače vyrobené v období poloviny 90. let 20. století. Toto grafické řešení poskytovalo při vykreslování 2D a 3D scén výkon srovnatelný (s určitými výjimkami, například při mapování textur) s high-endovými grafickými kartami pro PC, které byly vyrobeny o 10 let později. Architektura Elan byla nahrazena novou architekturou od SGI použitou ve strojích a dále pak architekturou v roce 1995. (cs)
- Elan Graphics is a computer graphics architecture for Silicon Graphics computer workstations. Elan Graphics was developed in 1991 and was available as a high-end graphics option on workstations released during the mid-1990s as part of the architectures family. Elan Graphics gives the workstation real-time 2D and 3D graphics rendering capability similar to that of even high-end PCs made over ten years after Elan's introduction, with the exception of texture mapping, which had to be performed in software. (en)
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| - Elan Graphics je architektura grafických karet používaných v počítačích společnosti Silicon Graphics. Byla vyvinuta v roce 1991 a jednalo se o high-endové grafické řešení pro počítače vyrobené v období poloviny 90. let 20. století. Toto grafické řešení poskytovalo při vykreslování 2D a 3D scén výkon srovnatelný (s určitými výjimkami, například při mapování textur) s high-endovými grafickými kartami pro PC, které byly vyrobeny o 10 let později. Elan v sobě obsahuje pět podsystémů: řídící jednotku, geometrické jednotky, rastrovou jednotku, framebuffer a zobrazovací jednotku. Ve vyšší verzi dokáže Elan zobrazovat scénu s rozlišením až 1280 x 1024 pixelů v 24bitové barevné hloubce. Dále dokáže zpracovávat analogový televizní signál podle standardů NTSC a PAL. Architektura Elan byla nahrazena novou architekturou od SGI použitou ve strojích a dále pak architekturou v roce 1995. (cs)
- Elan Graphics is a computer graphics architecture for Silicon Graphics computer workstations. Elan Graphics was developed in 1991 and was available as a high-end graphics option on workstations released during the mid-1990s as part of the architectures family. Elan Graphics gives the workstation real-time 2D and 3D graphics rendering capability similar to that of even high-end PCs made over ten years after Elan's introduction, with the exception of texture mapping, which had to be performed in software. The Silicon Graphics Indigo Elan option Graphics systems consist of four GE7 Geometry Engines capable of a combined 128 MFLOPS and one RE3 . Together, they are capable of rendering 180K Z-buffered, lit, Gouraud-shaded triangles per second. The framebuffer has 56 bits per pixel, causing 12-bits per pixel (dithered RGB 4/4/4) to be used for a double-buffered, depth buffered, RGB layout. When double-buffering isn't required, it is possible to run in full 24-bit color. Similarly, when Z-buffering is not required, a double-buffered 24-bit RGB framebuffer configuration is possible. The Elan Graphics system also implemented hardware stencil buffering by allocating 4 bits from the Z-buffer to produce a combined 20-bit Z, 4-bit stencil buffer. Elan Graphics consists of five graphics subsystems: the HQ2 Command Engine, GE7 Geometry Subsystem, RE3 Raster Engine, VM2 framebuffer and VC1 Display Subsystem. Elan Graphics can produce resolutions up to 1280 x 1024 pixels with 24-bit color and can also process unencoded NTSC and PAL analog television signals. The Elan Graphics system is made up of five daughterboards that plug into the main workstation motherboard. The Elan Graphics architecture was superseded by SGI's Extreme Graphics architecture on Indigo2 models and eventually by the IMPACT graphics architecture in 1995. (en)
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