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參數(shù)資料
| 型號(hào)： | 82865G |
| 廠商： | Intel Corp. |
| 英文描述： | Intel 865G/865GV Graphics and Memory Controller Hub |
| 中文描述： | 英特爾865G/865GV圖形和內(nèi)存控制器中樞 |
| 文件頁(yè)數(shù)： | 169/249頁(yè) |
| 文件大?。?/td> | 3540K |
| 代理商： | 82865G |
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170
Intel
82865G/82865GV GMCH Datasheet
Functional Description
the color of an object with the fog color as a function of distance. The greater the distance, the
higher the density (lower visibility for distant objects). There are two ways to implement the
fogging technique: per-vertex (linear) fogging and per-pixel (non-linear) fogging. The per-vertex
method interpolates the fog value at the vertices of a polygon to determine the fog factor at each
pixel within the polygon. This method provides realistic fogging as long as the polygons are small.
With large polygons (e.g., a ground plane depicting an airport runway), the per-vertex technique
results in unnatural fogging.
The GMCH supports both types of fog operations, vertex and per pixel or table fog. If fog is
disabled, the incoming color intensities are passed unchanged to the destination blend unit.
Alpha Blending (Frame Buffer)
Alpha Blending adds the material property of transparency or opacity to an object. Alpha blending
combines a source pixel color (R
S
G
S
B
S
) and alpha (A
S
) component with a destination pixel color
(R
D
G
D
B
D
) and alpha (A
D
) component. For example, this is so that a glass surface on top (source)
of a red surface (destination) would allow much of the red base color to show through.
Blending allows the source and destination color values to be multiplied by programmable factors
and then combined via a programmable blend function. The combined and independent selection
of factors and blend functions for color and alpha are supported.
DXn and OGL Logic Ops
Both APIs provide a mode to use bitwise ops in place of alpha blending. This is used for rubber-
banding (i.e., draw a rubber band outline over the scene using an XOR operation). Drawing it again
restores the original image without having to do a potentially expensive redraw.
Color Buffer Formats: 8-, 16-, or 32-bits per pixel (Destination Alpha)
The Raster Engine supports 8-bit, 16-bit, and 32-bit Color Buffer Formats. The 8-bit format is used
to support planar YUV420 format, which is used only in motion compensation and arithmetic
stretch format. The bit format of Color and Z will be allowed to mix.
The GMCH supports both double and triple buffering, where one buffer is the primary buffer used
for display and one or two are the back buffer(s) used for rendering.
The frame buffer of the GMCH contains at least two hardware buffers—the Front Buffer (display
buffer) and the Back Buffer (rendering buffer). While the back buffer may actually coincide with
(or be part of) the visible display surface, a separate (screen or window-sized) back buffer is used
to permit double-buffered drawing. That is, the image being drawn is not visible until the scene is
complete and the back buffer made visible (via an instruction) or copied to the front buffer (via a
2D BLT operation). Rendering to one and displaying from the other remove the possibility of
image tearing. This also speeds up the display process over a single buffer. Additionally, triple back
buffering is also supported. The Instruction set of the GMCH provides a variety of controls for the
buffers (e.g., initializing, flip, clear, etc.).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 82865GV | Intel 865G/865GV Graphics and Memory Controller Hub |
| 8288 | Bus Controller for SAB 8086 Family Processors |
| 828 | 2 X 2 8-Pole Filters |
| 8291A | GPIB TALKER/LISTENER |
| 829B | SILICON 28V HYPERABRUPT VARACTOR DIODES |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 82865GV | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Intel 865G/865GV Graphics and Memory Controller Hub |
| 82865N | 功能描述:HEX DIE 5/8-11 制造商:apex tool group 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
| 828661-1 | 功能描述:汽車連接器 25P JUN-TIMER CONN RoHS:否 制造商:Amphenol SINE Systems 產(chǎn)品:Contacts 系列:ATP 位置數(shù)量: 型式:Female 安裝風(fēng)格: 端接類型: 觸點(diǎn)電鍍:Nickel |
| 828662-1 | 制造商:TE Connectivity 功能描述:CONN TIMER CONN M 16 POS 5MM SLDR ST TH - Bulk 制造商:TE Connectivity 功能描述:16P JUN-TIMER STECK 制造商:TE Connectivity 功能描述:Conn Timer Connector M 16 POS 5mm Solder ST Thru-Hole |
| 82866N | 功能描述:HEX DIE 5/8-18 制造商:apex tool group 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
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