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Topic: Subpixel rendering

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	Subpixel rendering - Wikipedia, the free encyclopedia
		Subpixel rendering is not practical for use on a CRT.
		This reduction in moiré distortion is the primary benefit of subpixel rendered fonts on the conventional RGB Stripe panel.
		Although subpixel rendering increases the number of reconstruction points on the display this does not always mean that higher resolution, higher spatial frequencies, more lines and spaces, may be displayed on a given arrangement of color subpixels.
	en.wikipedia.org /wiki/Subpixel_rendering (934 words)

	Monotype Imaging: Subpixel Rendering (Site not responding. Last check: 2007-10-18)
		Subpixel rendering is ideal for cell phones, e-books, PDAs, digital cameras, camcorders or any type of device using a color LCD that needs to display small, highly-legible text.
		Subpixel rendering takes advantage of vertical LCD screen geometry, wherein each pixel is composed of three individually colored subpixels – red, green and blue.
		Subpixel rendering is based on the manipulation of each subpixel rather than the whole pixel.
	www.agfamonotype.com /ce/subpixel_rendering.asp (337 words)

	Sub Pixel Rendering - PDAPhoneHome.com
		What you REALLY need to do is render the font from the vector at 3x the physical resolution (making sure that all strokes and white areas within the letters are three subpixels wide horizontally), then translate that into a subpixel-encoded bitmap.
		If you want to use subpixel resolution, you need to carefully keep track of whether it's an even/odd (or, on the i300/ r/g/b) dot and follow the rules to make sure it comes out the color you want it to be.
		Subpixel rendering gives you a little more freedom to nudge things to the left or right, but it doesn't "really" give you three times the horizontal resolution.
	pdaphonehome.com /forums/showthread.php?threadid=1212 (1940 words)

	Apple typography - Wikipedia, the free encyclopedia
		Hinting is performed by a virtual machine that distorts the control points that define the glyph shapes so that they fit the grid defined by the screen better.
		A sample of text rendered by the Quartz engine in Mac OS X, using traditional and subpixel rendering.
		Apple has started using subpixel rendering in recent versions of Mac OS X. Version 10.2 introduced subpixel rendering of type and Quartz vector graphics.
	en.wikipedia.org /wiki/Apple_typography (4150 words)

	4.2.4 Subpixel Testing
		We may refer to this method as subpixel sample testing, to distinguish it from the other forms of subpixel testing, which are presented later.
		Of course, renderings produced using subpixel testing depend on which portion of the subpixel was chosen to test.
		The rendering depicted is optimistic; for every pixel on the boundary, a sample within the graph was chosen.
	www.dgp.toronto.edu /people/mooncake/thesis/node154.html (160 words)

	H. Dietz's Subpixel Rendering
		The simplest reasonable model for the LCD subpixels is that each is given the value of the corresponding color component of the image pixel that occupies the same space.
		The subpixel text is significantly more readable in the sense that the full 3x horizontal resolution is being used, but we have clearly sacrificed some color fidelity.
		The algorithm it uses is simply that the value for each subpixel is the weighted-average of the values of that color component for each of the neighboring subpixel ideal colors (even if they are not in the same compound pixel).
	dynamo.ecn.purdue.edu /~hankd/subpix (1161 words)

	GDI+: Next-Generation Graphics Device Interface: Draft March 10, 1999
		Rather, it will be possible for applications to create their windowed rendering surfaces with a linear gamma, with the conversion to non-linear gamma being done when the completed frame is swapped to the screen.
		Because of the nature of displaced subpixel rendering, its quality is reduced when a pixel in the frame buffer is mapped to more than one physical pixel on the LCD screen.
		Displaced subpixel rendering performance will be significantly enhanced when the surfaces are kept in standard RGB format and are directly writeable by the CPU.
	www.microsoft.com /whdc/archive/GDInext.mspx (3928 words)

	LG's 2.4-inch VGA subpixel rendering LCD - Engadget
		Yeah, you read that right: LG's got a subpixel rendering 500:1 contrast ratio LCD with a VGA resolution packed into 2.4-inches of screen real estate (which is a pretty astounding 330 pixels-per-inch).
		Sure, the whole subpixel rendering bit leaves us a slight but uneasy about the legitimacy of this display being properly VGA resolution, but if you peep the pics a little closer up you'll see that subpixel rendering or not, you just can't really fake that much visual information on-screen.
		Subpixel resolution is a trick that works when both pixel and background are shades of gray.
	www.engadget.com /2006/01/09/lgs-2-4-inch-vga-subpixel-rendering-lcd (1265 words)

	How Sub-Pixel Font Rendering Works (Site not responding. Last check: 2007-10-18)
		Once again, sub-pixel rendering, which does a beautiful job of displaying delicate sloping features by fine-tuning the location and width of each pixel, promises to bring italic fonts back into much more widespread use.
		As we've seen, the success of sub-pixel rendering depends upon using part of an adjacent pixel to extend an existing pattern of sub-pixels which the eye perceives as a slightly larger white or fl pixel.
		Since a few LCD panels have their sub-pixels arranged in B-G-R instead of R-G-B order, any industrial strength delivery of sub-pixel rendering technology will require a user-settable (or operating system readable) option to inform the system's LCD rendering engine whether the sub-pixels are arranged in 'forward' or 'reverse' order.
	grc.com /ctwhat.htm (2047 words)

	Forever For Now - Java 2 SE 6.0 Aesthetics Preview
		Rendering of fonts on a subpixel grid was already supported by the major operating systems, like Windows and Mac OS X, and desktop environments like KDE and GNOME, but Java uses its own cross-platform software widget rendering system called Swing.
		Second difference is the way tabs are rendered, look at the topside of each screenshot: the older Java renders them correctly, the active tab is easily discernable and simply looks good.
		Subpixel font antialiasing offers a great advantage for LCD and TFT owners everywhere, and it will provide a way for Java applications to better visually integrate into the native windowing environment.
	www.ffnn.nl /pages/articles/java/java-2-se-6.0-aesthetics-preview.php (2103 words)

	Surfin' Safari: Comment on An Education in Antialiasing (Site not responding. Last check: 2007-10-18)
		A more compelling point is that Safari's rendering does not match that of other Cocoa apps, and that seems wrong to me. I do certainly agree that pure Cocoa apps (this excludes Camino) should be consistent in their rendering of fonts on the OS, and that OS settings should be obeyed.
		Though it is more about Microsoft's ClearType version of subpixel rendering (which was ripped from Apple's subpixel rendering for the Apple II in the early 80's), the same topics apply to Quartz.
		Subpixel rendering is a very good thing, and it's good that Quartz can do it.
	weblogs.mozillazine.org /mt/comment.cgi?entry_id=2921 (3182 words)

	dvcreators.network forums - What's up with Edition's "sub-pixel rendering engine"?
		If the "rendering engine" in software is subpar, you'll see "jerky" or "jumpy" motion" and render artifacts like pixelation or jagged edges on diagonal lines.
		A great deal of development was put into Edition's subpixel rendering engine so that it would produce smooth, superfine results on a par with very expensive products (like the multimillion dollar boxes used in Hollywood movies).
		"Render quality" is not something most people think about when buying editing software- but slightly rotate a video layer or graphic in your editing software and notice how pixelated the video looks and how jagged the diagonal line is...
	www.dvcreators.net /discuss/showthread.php?t=664 (186 words)

	Physics and Astronomy Club at SFSU (Site not responding. Last check: 2007-10-18)
		Color subpixel rendering allows luminance information to be located at subpixel resolution, increasing the information efficiency of color displays.
		These applications are handicapped by color display architectures that were not designed with subpixel rendering in mind.
		Human Vision System characteristics, subpixel rendering theory, algorithms, and displays co-optimized for subpixel rendering efficiency and human vision system characteristics will be presented.
	www.physics.sfsu.edu /~pac/colloqium/30_09_2002.html (169 words)

	WhatTheyThink.com - Print's Home Page
		Subpixel rendering technology is designed to improve the quality and readability of text on colour LCD screens.
		Subpixel rendering technology is offered as an optional component of Agfa Monotype's iType font engine, a font rendering subsystem based on TrueType and OpenType font standards.
		Both iType and subpixel rendering technology are part of Agfa Monotype's Text & Imaging Pipeline, a suite of development products and services for consumer device manufacturers.
	members.whattheythink.com /news/newslink.cfm?id=13381 (763 words)

	Sub-Pixel Font Positioning on UNIX mini-HOWTO
		Sub-pixel font positioning is also known as "sub-pixel rendering", "sub-pixel decimation", or by Microsoft's term for its implementation of the technique, "Microsoft(r) ClearType(tm)".
		However, on a laptop screen, sub-pixel rendering is a different kettle of fish.
		Thanks to work by Keith Packard, XFree86 4 now includes Xft and Render, two extensions to the X display protocol which allow use of sub-pixel rendering.
	jmason.org /howto/subpixel.html (1516 words)

	Joseph Alter, Inc
		Shave's rendering is an extension of z-buffer based rendering.
		Anisotropic highlights, backlighting, soft self shadowing, and subpixel rendering contribute to the realism.
		Because shave's buffer based rendering, there is no limit to strand count or complexity.
	www.joealter.com /shave/rendering.htm (143 words)

	Anti-Grain Geometry - Introduction
		The renderer just adds a color to the scanline and writes the result into the rendering buffer.
		Rendering Buffer is a buffer in memory that will be displayed afterwards.
		Colors in AGG appear only in renderers, that is, when you actually put some data to the rendering buffer.
	www.antigrain.com /doc/introduction/introduction.agdoc.html (2648 words)

	[No title]
		If the camera // is animated, we recompute our screenspace projections and // front-to-back face ordering // // If the subpixel visibility option is turned on, we use the image // as an accumulation buffer, so we need to initialize the image to // fl, regardless of the actual background colour.
		In this case, // the background image is blended in after all the faces have been // rendered.
		If // subpixel rendering is on, then this region represents a single pixel, otherwise // it represents an 8x8 block of pixels.
	www.dgp.toronto.edu /~jrmeredi/RenderDude/Source/CamHCM.cpp (994 words)

	Articles - Computer display (Site not responding. Last check: 2007-10-18)
		Subpixel rendering depends on this misalignment; technologies making use of this include the Apple II from 1976 [1], and more recently Microsoft (ClearType, 1998) and XFree86 (X Rendering Extension).
		Moving texts can appear in italics, even when the display resolution is too low to show static italics: a fractional time delay causes an apparent corresponding shift of a fraction of a pixel.
		The X Window System provides configuration mechanisms for using a single hardware monitor for rendering multiple virtual displays, as controlled (for example) with the Unix DISPLAY global variable or with the -display command option.
	www.eist.biz /articles/Computer_monitor (660 words)

	java.net: LCD Text: Anti-Aliasing on the Fringe
		Also known as "subpixel rendered text," LCD text is an algorithm for performing anti-aliased text rendering on LCD displays.
		That blog entry talked about the new rendering hints for enabling LCD text, about how the new capability is used in Swing's native and cross-platform looks and feels, and about Swing's new tracking of desktop preferences to make Swing application text look more like native application text.
		I'd heard of subpixel rendering before and was looking forward to finding out some specifics but then I read "the actual calculation of the color ramp up and down is more involved (and beyond the scope of this article)".
	today.java.net /pub/a/today/2005/07/26/lcdtext.html (4573 words)

	Diary for raph
		This configuration succeeds in rendering high-contrast, fairly visually uniform text (stroke weight and spacing are quite uniform, but curves and diagonals are softer than vertical and horizontal lines).
		This kind of rendering is perfectly reasonable for GUI elements and HTML rendering, but not for WYSIWYG viewing (such as PostScript and PDF).
		As far as I know, there is only one text rendering engine that does antialiasing, hinting (specifically, contrast enhancement by subtly altering the position of stems), and subpixel positioning: Acrobat (Reader) 5.
	www.advogato.org /person/raph/diary.html?start=342 (4380 words)

	Sub-Pixel Font Rendering Technology (Site not responding. Last check: 2007-10-18)
		be their adoption of sub-pixel font rendering technology.
		It is my hope that the pages on this little web site will help to speed the application of this technology for the benefit of the entire personal computing industry.
		was Microsoft's Comdex announcement of their new breakthrough font rendering technology, dubbed "ClearType".
	grc.com /cleartype.htm (446 words)

	MobileRead Networks - Nicest Fonts to use with iSilo 4.x
		I've noticed auto-scroll takes a performance hit when using any non-system font, or at small font sizes (more text on screen to render), making it rather jumpy, which is one of the reasons I don't much use it.
		Subpixel rendering would be a big nuisance to implement on PDAs given rotatable or flippable screens.
		Grayscale antialiasing doesn't have any of these problems, and doesn't also have the problem that subpixel rendering might infringe on Microsoft patents.
	www.mobileread.com /forums/showthread.php?p=11955 (1518 words)

	Sub Pixel Rendering [Archive] - PDAPhoneHome.com
		03-07-2002, 10:30 PM To avoid color fringes, every subpixel needs to be part of a subgroup with 3 or more adjacent subpixels of the same intensity level.
		03-10-2002, 03:49 AM If you want subpixel-rendered fonts to look good, you can't render the font at normal resolution, then use subpixel rendering to smooth it out.
		It doesn't give you the freedom to make lines that are less than 1 physical pixel (3 subpixels) wide.
	pdaphonehome.com /forums/archive/index.php/t-1212.html (1900 words)

	Accurate Rendering by Subpixel Addressing (Site not responding. Last check: 2007-10-18)
		A simple method is presented for eliminating most pixel-positioning errors when rendering lines and polygons with J.E. Bresenham's algorithm (see IBM Syst.
		This eliminates the need to grow polygons to avoid dropout and opens the possibility of drawing surfaces composed of adjacent polygons with read modify/write pixel operations such as add or alpha buffering.
		It is shown that most rendering artifacts of today's display controllers ultimately result from pixel-positioning errors, not insufficient z-buffer resolution.
	csdl.computer.org /comp/mags/cg/1990/05/g5045abs.htm (190 words)

	EE699 Assignment 0a: Thirdy-Something
		The LCD subpixel rendering technique improves effective display quality by making use of the fact that the three color channels within each display pixel are spatially distinct and consistently ordered.
		Thus, your basic transformation is to take an original image that has 3 times the desired horizontal resolution, and to render that at the output resolution by separately controlling the 3 color channels within each pixel.
		For example, simply taking the appropriate channel value from the original pixel that has the same position as this output subpixel does maximize effective resolution, but greatly diminishes color quality: color fringes are seen on many object edges within the image.
	aggregate.org /hankd/CPP/a0a.html (1819 words)

	[Fontconfig] FAQ update, accessibility comments (Site not responding. Last check: 2007-10-18)
		Hi all, I have updated the Fontconfig FAQ at http://wiki.fontconfig.org/cgi-bin/twiki/view/Fontconfig/FontconfigFAQ with a discussion of how to disable antialiased font rendering on a Fontconfig-enabled system.
		I've also tried various combinations of subpixel rendering settings but that seems to make it even worse, the result as I can see it is that with subpixel rendering I see funky bits of red and/or blue along with the text.
		Apologies if this is not the right forum for this, but I gather that quite a few desktop/distro people probably lurk here.
	keithp.com /pipermail/fontconfig/2003-July/000563.html (293 words)

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