Difference between revisions of "Pixel"
From Sega Retro
| Line 7: | Line 7: | ||
==Fillrate== | ==Fillrate== | ||
| − | The term '''fillrate''' refers to the number of pixels a video card or graphics chipset can render in a second. | + | The term '''fillrate''' refers to the number of pixels a video card or graphics chipset can render in a second. This is also known as the '''rendering fillrate'''. |
The units used to measure fillrate: | The units used to measure fillrate: | ||
| Line 14: | Line 14: | ||
*1 gigapixel/sec (GPixel/s) = 1 billion pixels per second (1000 MPixels/s) | *1 gigapixel/sec (GPixel/s) = 1 billion pixels per second (1000 MPixels/s) | ||
| − | The fillrates for Sega consoles: | + | The fillrates for [[Sega]] consoles: |
*[[Sega Master System]] - 5.369317 MPixels/s (NTSC), 5.320342 MPixels/s (PAL) | *[[Sega Master System]] - 5.369317 MPixels/s (NTSC), 5.320342 MPixels/s (PAL) | ||
| Line 20: | Line 20: | ||
*[[Sega Saturn]] - 57.2728 MPixels/sec (NTSC), 56.875 MPixels/sec (PAL) | *[[Sega Saturn]] - 57.2728 MPixels/sec (NTSC), 56.875 MPixels/sec (PAL) | ||
*[[Sega Dreamcast]] - 3.2 GPixels/s (opaque polygons), 100–500 MPixels/s (translucent polygons) | *[[Sega Dreamcast]] - 3.2 GPixels/s (opaque polygons), 100–500 MPixels/s (translucent polygons) | ||
| + | |||
| + | ==Texel== | ||
| + | A '''texel''' ('''texture element''' or '''texture pixel''') is the fundamental unit of texture space. Textures are represented by arrays of texels, just as pictures are represented by arrays of pixels. | ||
| + | |||
| + | *'''Units''' | ||
| + | **1 megatexel (MTexel) = 1 million texels | ||
| + | **1 gigatexel (GTexel) = 1 billion texels (1000 MTexels) | ||
| + | |||
| + | *'''Fillrate''' ('''texture fillrate''' or '''texturing fillrate''') | ||
| + | **1 megatexel/sec (MTexel/s) = 1 million texels per second | ||
| + | **1 gigatexel/sec (GTExel/s) = 1 billion texels per second (1000 MTexels/s) | ||
| + | |||
| + | The texture fillrate was the same as the rendering fillrate for Sega consoles up until the [[Sega Saturn]]. The [[Sega Dreamcast]] has differing fillrates for rendering and texturing. | ||
Revision as of 08:46, 25 December 2015
Pixel is a contraction of Picture Element. A single, indivisible unit that makes up an image when used in conjunction with many (perhaps thousands or millions) other pixels. Typically, the visible part of the Mega Drive screen consists of 71680 pixels (i.e. it has a resolution of 320x224).
Units
- 1 megapixel (MPixel) = 1 million pixels
- 1 gigapixel (GPixel) = 1 billion pixels (1000 MPixels)
Fillrate
The term fillrate refers to the number of pixels a video card or graphics chipset can render in a second. This is also known as the rendering fillrate.
The units used to measure fillrate:
- 1 megapixel/sec (MPixel/s) = 1 million pixels per second
- 1 gigapixel/sec (GPixel/s) = 1 billion pixels per second (1000 MPixels/s)
The fillrates for Sega consoles:
- Sega Master System - 5.369317 MPixels/s (NTSC), 5.320342 MPixels/s (PAL)
- Sega Mega Drive - 13.3 MPixels/s
- Sega Saturn - 57.2728 MPixels/sec (NTSC), 56.875 MPixels/sec (PAL)
- Sega Dreamcast - 3.2 GPixels/s (opaque polygons), 100–500 MPixels/s (translucent polygons)
Texel
A texel (texture element or texture pixel) is the fundamental unit of texture space. Textures are represented by arrays of texels, just as pictures are represented by arrays of pixels.
- Units
- 1 megatexel (MTexel) = 1 million texels
- 1 gigatexel (GTexel) = 1 billion texels (1000 MTexels)
- Fillrate (texture fillrate or texturing fillrate)
- 1 megatexel/sec (MTexel/s) = 1 million texels per second
- 1 gigatexel/sec (GTExel/s) = 1 billion texels per second (1000 MTexels/s)
The texture fillrate was the same as the rendering fillrate for Sega consoles up until the Sega Saturn. The Sega Dreamcast has differing fillrates for rendering and texturing.