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Topic: Frame buffer


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In the News (Thu 16 Feb 12)

  
  Linux Kernel Documentation :: fb : framebuffer.txt
It 12 represents the frame buffer of some video hardware and allows application 13 software to access the graphics hardware through a well-defined interface, so 14 the software doesn't need to know anything about the low-level (hardware 15 register) stuff.
Frame Buffer Resolution Maintenance 114 -------------------------------------- 115 116 Frame buffer resolutions are maintained using the utility `fbset'.
After the 169 whole screen (frame) was painted, the beam moves back to the upper left corner: 170 this is called the vertical retrace.
www.mjmwired.net /kernel/Documentation/fb/framebuffer.txt   (1828 words)

  
 [No title]
FRAME BUFFERS A frame buffer, or picture memory, is a computer memory organized into an m x n rectangular grid of dots, called picture elements, or pixels for short.
With an integrated frame buffer of 3*n bits per pixel, one can simulate a segregated frame buffer having n bits per primary; an integrated frame buffer is more general than a segregated one.
Currently, segregated frame buffers are much more common than integrated systems in the image processing world, probably because of their simplicity and the higher quality of images.
www.cs.cmu.edu /~ph/ciq_thesis   (6590 words)

  
 [No title]
It represents the frame buffer of some video hardware and allows application software to access the graphics hardware through a well-defined interface, so the software doesn't need to know anything about the low-level (hardware register) stuff.
The frame buffer devices are also `normal' memory devices, this means, you can read and write their contents.
Frame Buffer Resolution Maintenance -------------------------------------- Frame buffer resolutions are maintained using the utility `fbset'.
www.charmed.com /txt/framebuffer.txt   (1610 words)

  
 Buffer (computer science) - Wikipedia, the free encyclopedia
In computing, a buffer is a region of memory used to temporarily hold output or input data, comparable to buffers in telecommunication.
Buffers are used when there is a difference between the rate at which data is received and the rate at which it can be processed, or in the case that these rates are variable, for example in a printer spooler.
In practice however, a buffer is thought of as being a contiguous area of memory of a certain length, but normally greater than one.
en.wikipedia.org /wiki/Buffer_(computer_science)   (440 words)

  
 V-Ray frame buffer
Due to technical reasons, the original 3dsmax frame buffer still exists and is being created.
Output resolution - this is the resolution that you wish to use with the V-Ray frame buffer.
Drag the mouse over the V-Ray frame buffer while rendering to see which buckers are rendered first.
www.spot3d.com /vray/help/150R1/vfb_index.html   (955 words)

  
 Frame Buffer FAQ.
In its simplest meaning, and as far as the Graphics hardware engineers are concerned, a frame buffer is simply that; the video memory that holds the pixels from which the video display (frame) is refreshed.
These frame buffers attach to the AFX bus (an early version of the UPA bus) rather than the SBus, and are only supported in the SparcStation 4 and 5.
The frame buffer device drivers and interfaces are considered proprietary and are not publicly documented.
www.sunhelp.org /faq/FrameBuffer.html   (13144 words)

  
 Stencil buffer - DmWiki
A stencil buffer is one of the several buffers that compose a 3D application's frame buffer.
The key feature of the stencil buffer is that one can enable the stencil test, which causes pixels to be drawn or not drawn to the other parts of the frame buffer depending on the contents of the stencil buffer.
Two of the most common uses of the stencil buffer are for creating certain kinds of reflections, and in the shadow volumes algorithm.
www.devmaster.net /wiki/Stencil_buffer   (250 words)

  
 Project I: Buffer Manager, COSC 6421, Fall 2002,
A frame number is added to the end of the queue when the pin_count for the frame is decremented to 0.
Whenever a page is pinned, the corresponding frame in the buffer pool should be removed from the availability queue.
Whenever a page is unpinned, the corresponding frame in the buffer pool should be added to the head of the availability queue.
www.cse.yorku.ca /~jarek/courses/6421/projects/BufMgr.html   (1391 words)

  
 [No title]
Meaning of a pixel value in the frame buffer memory or in the palette.
Length of the frame buffer to be mapped.
The index is invalid or the buffer is unacceptable.
research.microsoft.com /invisible/conf/framebuffer.xml   (816 words)

  
 Frame Buffer History Lesson. For Internal Use Only
The 10 bits on the frame buffer are: 8-bits color frame buffer, 1 bit monochrome frame buffer and 1 bit enable plane, which determines which bits of the colour and mono planes are displayed.
The 10-bit deep frame buffer found on the CPU board of the Sun-3/110, and is an option to the Sun-3/60 and Sun-4/110.
The 10 bits on the frame buffer are: 8-bits color frame buffer, 1 bit monochrome frame buffer, and 1 bit that tells it which (between the color and monochrome) frame buffer to display (this bit is called the "enable" bit).
www.obsolyte.com /sunFAQ/faq_framebuffer/history_faq.html   (1688 words)

  
 A Reusable Software Double-Buffer
It is common for all of the frames in one scene of an animation to share a common background.
Each frame can be divided into three parts: the background common to all frames (the fl curve and the text), the permanent paint that should be included in all subsequent frames (the red path), and the ephemeral paint that should only be included in this frame (the beam).
In general, the rectangle includes only the pixels for the beam from the previous frame (since those had to be erased), the new piece of the red path, and the new beam.
home.pacbell.net /dandal/aheydon/papers/juno2-dblbuffer/DblBuffer.html   (1604 words)

  
 The Frame Buffer
The frame buffer is organized as a single one-dimensional array of pixel values.
The first byte (byte 0) of the frame buffer represents the upper left corner pixel of the screen.
Unlike the frame buffer, the Z-buffer data is contiguous.
docs.hp.com /en/B2355-90143/ch04s05.html   (573 words)

  
 Chapter 16. Dynamic Data   (Site not responding. Last check: 2007-10-11)
The process with frame 12 reads from a buffer with frame 12—the newest available buffer and an exact match to the process frame number.
The process with frame number 7 reads from a buffer with frame 5–the latest buffer that is not too new for frame 7.
When a buffer is readable, its data should not be changed because there might be other processes reading that same buffer that would then be immediately affected by any changes.
www.cs.rochester.edu /u/wyi/sgi/ch16.html   (5283 words)

  
 OpenGVS Frame Buffer Facility
The Frame Buffer Facility is used to establish a software resource relationship between the graphics hardware frame buffer and OpenGVS.
Hardware frame buffers, sometimes referred to as "heads" or "pipes", are used by the underlying rendering software for physically drawing your images.
In nearly all cases, all you'll need to do is create a single frame buffer resource and connect your channel to the frame buffer.
www.quantum3d.com /products/opengvs/o_frame.htm   (208 words)

  
 Framebuffer - Wikipedia, the free encyclopedia
The framebuffer is a video output device that drives a video display from a memory buffer containing a complete frame of data.
The primary buffer (often referred to as the "front buffer") becomes the secondary buffer, and the secondary buffer becomes the primary.
This switch is usually done during the vertical blanking interval to prevent the screen from "tearing" (i.e., half the old frame is shown, and half the new frame is shown).
en.wikipedia.org /wiki/Frame_buffer   (1857 words)

  
 Kernel 2.2's Frame-buffer LG #36
Once the frame buffer kernel is booted the fbset utility can be used to switch to other modes.
It has advantages with some hardware, but it takes time to figure out and use effectively, and the benefits are nice for console users but won't be of much use to those who spend most of their time in X Windows.
I think that the reason it will be a part of the next stable kernel release is that frame buffer devices aren't Intel-specific, as is much of the current console code.
linuxgazette.net /issue36/ayers.html   (1038 words)

  
 Compression of frame buffer ? - Beyond3D Forum
The color buffer is harder to compress though, but it should be possible too.
I am not sure whether stencil buffer is compressed or not, since the most simple test (without textures) is fillrate limited, and textured tests are not easy to analyse.
Even lossy color buffer compression is tricky since some games lock and read back colors to determine visibility (again if lossy changes the color slightly this might fail) but its rare.
www.beyond3d.com /forum/showthread.php?p=3610   (1464 words)

  
 Linux 2.2 and the Frame-Buffer Console
Above the frame buffer is the frame-buffer console (fbcon).
The X server for the frame buffer is already available as Xfree86-FBDev and has shipped with some distributions.
Also, the frame buffer is not meant to be a generic base for an acceleration architecture.
www.linuxjournal.com /node/3278/print   (2840 words)

  
 The Z-Buffer Device
When used for 3-D graphics, two buffers are present: an 8-bit-deep frame buffer that contains the picture; and a 16-bit-deep Z-buffer of the same resolution, containing the z-value of the visible surface of each pixel.
The normal procedure is to set the graphics device to "Z", draw the objects, read the frame buffer, and then select another graphics device and write the image.
The values in the depth buffer are short integers, scaled from -32765 to +32765, corresponding to normalized Z-coordinate values of 0.0 to 1.0.
www.physics.nyu.edu /grierlab/idl_html_help/devices18.html   (758 words)

  
 Frame Buffer FAQ.
These frame buffers attach to the AFX bus rather than the SBus, and are only supported in the SparcStation 4 and 5.
The version for the Sparc 5 is also known as the S24 and is a 24 bit frame buffer.
Several models exist; the FFB1 is available in single buffered (known as the Creator) and double buffered (known as the Creator 3D) formats; additionally the original Creator 3D is available in 66MHz and 75MHz forms.
www.obsolyte.com /sunFAQ/faq_framebuffer/framebuffer.html   (11861 words)

  
 [Fastboot] kexec and frame buffer   (Site not responding. Last check: 2007-10-11)
Here are my tests and related results: 1) Frame buffer not enabled Original kernel command line: root=/dev/hda1 ro Relocated kernel command line: root=/dev/hda1 ro Everything went well, as supposed to be.
2) Frame buffer enabled in the relocated kernel Original kernel command line: root=/dev/hda1 ro Relocated kernel command line: root=/dev/hda1 ro vga=791 This time I was able to read boot messages and so on, but I couldn't be able to load vesafb in the relocated kernel.
3) Frame buffer enabled in the original kernel Original kernel command line: root=/dev/hda1 ro vga=791 Relocated kernel command line: root=/dev/hda1 ro {vga=791,} This time I wasn't able to read boot messages in the relocated kernel, whether vga parameter was set or not.
lists.osdl.org /pipermail/fastboot/2005-August/001799.html   (252 words)

  
 Dr. Dobb's | Using the VESA BIOS 2.0 Linear Frame Buffer | July 22, 2001
With a banking scheme, a window into a part of the frame buffer is addressed at A000:0000, but the piece of frame buffer this window points to can slide around.
The second capability removes the need for banking altogether by handling the frame buffer as a single chunk of contiguous memory, assuming that the underlying hardware is capable of supporting such access.
Acquiring a pointer to a graphics system's linear frame buffer is a simple but lengthy process, requiring care since a misstep at any point renders the frame buffer invalid.
www.ddj.com /184409699   (3741 words)

  
 Choosing Graphics and TV Cards for Home Theater PCs: Graphics Frame Buffer Memory
A frame is basically a unit of graphical data that represents one screen's worth of information in an ongoing stream of images for display.
Each frame of television data consists of 540 lines times 720 pixels, plus additional data for one or more sound channels and subtitles (think of second audio program, or SAP, for access to foreign language soundtracks and subtitles for the hearing impaired).
Frame rates for HDTV and DVD-Video run between 24 and 60 per second, which produces pretty hefty data streams given the size of individual frames.
www.extremetech.com /article2/0,1697,1955087,00.asp   (725 words)

  
 Linux.com - Framebuffer HOWTO: Using multi-headed framebuffers
Using ":1" when launching another X server for the other frame buffer will allow you to have two X servers running.
I just give the number of the frame buffer as an argument and it starts right up.
While it seems easy enough to add a line to the gdm/xdm Xservers file, the constrain that you must start the X server from the same frame buffer prevents the obvious solution from working.
www.linux.com /howtos/Framebuffer-HOWTO-14.shtml   (1785 words)

  
 ENOVIA 3DCom and X Virtual Frame Buffer on HP-UX
The X Virtual Frame Buffer is an X server that renders to virtual memory rather than to a graphics display device.
This option specifies the directory in which the memory mapped files containing the frame buffer memory should be created.
This option specifies that the frame buffer should be put in shared memory.
h20331.www2.hp.com /hpsub/cache/286048-0-0-225-121.html   (1267 words)

  
 Hacktarux wrapper with hardware frame buffer emulation. Files and feedback - Emu X Haven
I have rewritten those functions in the wrapper, which responsible for texture frame buffer functionality.
Texture frame buffer is used for hardware frame buffer emulation.
You must disable frame buffer emulation to avoid flickering in multiplayer mode (with 2 or more players).
www.emuxhaven.net /forums/showthread.php?t=6123   (870 words)

  
 Chair: Frame Class Reference
Ensures that frame space in RAM is cleared and free to the OS.
This method simply iterates through all the pixels in the Frame buffer and colors them to the given color.
This method scans through the entire frame buffer looking for pixel that satisfy the specified commands.
web.mit.edu /kvogt/Public/osrc/doc/html/classFrame.html   (716 words)

  
 [ MorphoSys - Frame Buffer ]
The MorphoSys FB is a fast memory buffer capable of running synchronously at 100MHz.The core memory array is made up of SRAM cells and data is directed using multiplexers and buffers.
It functions as a buffer for SDRAM data between the DMAC and RC.
There are two separate memory buffers called sets that are internal to the FB.
www.eng.uci.edu /morphosys/fb.html   (218 words)

  
 Frame Buffer effects in KotOR II - DriverHeaven.net
I have enabled FRame Buffer effects in the options menu in the game, and in the.ini-file it too clearly states that they are indeed enabled, but in-game I can't see any pretty glows at all.
Copying atioglxx.dll from the Catalyst 4.2 package solves the Frame Buffer problem, but unfortunately it also takes away some of the performance.
If you're having frame buffer issues, you can either replace the atioglxx.dll with one from the 4.2-4.11 range of Catalysts, or if you don't care about the effects and just want to fix performance, you can disable Frame Buffer Effects in the game and add the line
www.driverheaven.net /showthread.php?t=68222   (1102 words)

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