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Topic: Bitmaps


In the News (Tue 2 Dec 08)

  
  bitmaps
Then for each square, we initialize the rank_attacks[square][rank_contents] to the bitmap that matches the squares that a rook/queen on "square" could move to, assuming the rank is occupied as per the eight bit value "rank_contents".
For example, take the occupied_squares bitmap used earlier, but add a rook on square F5 instead of a bishop as in the previous example (figure 8), and assume we are trying to initialize rank_attacks[37][100] (37 is the square F5, and 100 represents the occupied squares on that rank, 01100100).
Perhaps the primary performance improvement to using bitmaps came from the Crafty project however, when the concept of "rotated bitmaps" was developed as an alternative to the classic incremental update approach used in chess 4.0, because this produced a substantial performance increase with no loss at all in capability.
www.cis.uab.edu /hyatt/bitmaps.html   (5018 words)

  
 A Beginners Guide to Bitmaps
Bitmaps are defined as a regular rectangular mesh of cells called pixels, each pixel containing a colour value.
As with 8 bit grey bitmaps each pixel has one byte associated with it only now the value in that byte is no longer a colour value but an index into a table of colours, called a palette or colour table.
A common operation that reduces the size of large 24 bit bitmaps is to convert them to indexed colour with an optimised palette, that is, a palette which best represents the colours available in the bitmap.
local.wasp.uwa.edu.au /~pbourke/dataformats/bitmaps   (2500 words)

  
  PlantStudio Help: Using plant bitmaps
You can keep track of how much memory plant bitmaps are using up by watching the little plant-picture indicator at the bottom of the main window (next to the file-changed pencil indicator).
Plant bitmaps affect the speed of drawing and ease of selection, but not using them doesn't have to keep you from using PlantStudio.
Since any pixel in a plant bitmap that has this color will not be drawn, you should choose a color you expect NEVER to use in any plant, such as fl or white.
www.kurtz-fernhout.com /PlantStudio/help/plantstudioUsing_plant_bitmaps.html   (705 words)

  
 CodeGuru: Bitmaps & Palettes
The bitmaps can be of any size, and the array can be as big as memory will allow.
Also, see how to load a bitmap from a BMP file with the palette information and display a bitmap without flicker.
Converting a bitmap to a region - memory leak fix
www.codeguru.com /cpp/g-m/bitmap   (1667 words)

  
 Bitmaps
A bitmap is a graphic object used to display a picture on a window or to store it in the computer memory as a file.
Bitmaps that are professional looking pictures and that tend to be taller or wider are usually used to display illustrative pictures.
The nWidth and nHeight parameters specify the dimensions of the bitmap, in pixels.
www.functionx.com /bcb/gdi/bitmaps.htm   (4670 words)

  
 Using Bitmaps in WinCE Applications
Bitmaps raise all sorts of porting issues: color depth, bitmap organization, size translations, and CE support for ROP codes.
Now with bitmaps, we are confronted with another such consideration: possible differences in color depth between a bitmap and a display device.
Simply opening the bitmaps in a graphics application and saving them as 16 color or 4 bit gray scale format may allow you device dependent bitmap code to port to Win32 unchanged.
www.developer.com /ws/pc/article.php/2107151   (979 words)

  
 Creating bitmaps from objects
The bitmaps can be virtually any size, use any number of colors and can even use a mask (include see-through areas).
If your final bitmap has see-through areas, it will look better if the edges of the objects in the drawing are smoothed against the background color.
Bitmaps can look like they are of a lower quality than normal if they are not shown at a high enough magnification.
web.mit.edu /xaralx_v0.7/www/xarax/IDH_How_Creating_bitmaps_from_objects.htm   (381 words)

  
 Page 2
Bitmaps are made up of tiny pixels arranged on a grid.
The lower left corner of the bitmap is identified by the coordinates 0,0.
The bitmap circle, because it is made up of pixels, and because pixels are a fixed size that cannot be made larger or smaller, will become jagged and pixelated if we make it too much larger.
www.xaraxone.com /webxealot/xealot30/html/features.htm   (900 words)

  
 Tutorial » Bitmaps in Flash
Bitmaps are painted images that are encoded pixel-for-pixel with binary color values.
The purpose of this tutorial is not to explain the differences between vector graphics and bitmaps, but it should suffice to say that they are two completely different types of data.
With the bitmap in your library, it is now ready for use in your Flash movie as a bitmap symbol.
www.albinoblacksheep.com /tutorial/bitmaps   (700 words)

  
 EPSON | Presenters Online : Basics > Visuals > Capturing Bitmaps at the Correct Resolution for Projection   (Site not responding. Last check: )
A bitmap may be scaled up, if the dimensions are multiplied by a whole number, for instance twice the natural size or a 200% enlargement.
A bitmap may be scaled down, if the dimensions are divided by a whole number, for instance half the natural size or by 50%.
When creating bitmap images for screen display it is therefore important to consider the required size of the eventual image, and how this may vary on screens of different resolution.
www.presentersonline.com /basics/visuals/capturingbitmaps.shtml   (682 words)

  
 Bitmaps and Vectors
Be aware that although almost every graphics program you encounter will be primarily a vector ("drawing") or bitmap ("painting") program, it will probably offer both types of graphic and the chance to mix them together.
In some drawing software, it is possible to create graphics that look like typical bitmaps, (say, with airbrush lines, for example), yet still remain vectors and so be editable.
Some software can do a good job of transforming a given bitmap into a vector graphic, though there is always a loss of detail involved.
www.animationpost.co.uk /tech-notes/bitmaps-vs-vectors.htm   (668 words)

  
 Gamasutra - Features - "Using Bitmaps for Automatic Generation of Large-Scale Terrain Models "[04.27.00]
Since the bitmap is 8-bit, simply set the value (palette index) at any given point (x, y) in the image to a predetermined terrain type.
The scale vector is created based on the ratio of the size of the bitmap to the size of the terrain model one wishes to create from the bitmap.
The second method of scaling the height data treats the bitmap values as points on an arbitrarily large surface, or as control points used to generate such a surface parametrically, in which each value in the height bitmap is a discrete sample from this surface.
www.gamasutra.com /features/20000427/martin_01.htm   (1103 words)

  
 CorelDraw 101
Bitmap images are constructed from a series of pixels, or tiny squares.
The one on the left is a bitmap, size 122,888 bytes.
Bitmap images lose quality if they are scaled to a larger size.
www.webreference.com /graphics/corel101/1a   (493 words)

  
 Bitmap Basics - A GDI tutorial
Bitmaps and palettes are both potentially the most usefull part and most confusing parts of the GDI subsystem to neophyte coders.
This type of bitmap is defined in the windows header files as a number of structs that are filled in by the programmer.
When combined with a color bitmap via a raster operation (typically in a call to BitBlt) the background pixels in the monochrome bitmap are first mapped to the background color of the color bitmaps DC.
www.mvps.org /user32/gditutorial.html   (3426 words)

  
 Using Bitmaps for Automatic Generation of Large-Scale Terrain Models
In doing so, there is a trade-off between losing local detail from the original height bitmap (since smoothing reduces noise by spreading it over a larger area, making it more difuse) and generating more terrain data from a bitmap of given size.
However, instead of using an equation or other means independent of the values contained in the source bitmap, the values in the nxn convolution mask will be taken directly from source bitmap (specifically, the nxn neighborhood surrounding pixel g[i, j]).
From this histogram, the value that is most frequently occurring in the nxn region surrounding the pixel g[i, j] shall be the value of the pixel h[i, j].
www.gamasutra.com /features/20000427/martin_pfv.htm   (3589 words)

  
 GameDev.net - Compiled Bitmaps
Each non-zero pixel in a bitmap image has an offset from the first position in the image, and that offset is used by the function to plot it onto the background buffer.
You could conceivably compile as much of a bitmap as possible into one in-line function, and then continue to compile the next portion of the bitmap into yet another (uniquely-named) in-line function, etc. until the whole bitmap is compiled across multiple in-line functions.
But for very-large bitmaps, this may be a viable option that could still trim a lot of processing time off of your drawing section, while at the same time keeping you from having to get your hands dirty messing with the external assembler.
www.gamedev.net /reference/articles/article814.asp   (5183 words)

  
 GNE Sample Bitmaps   (Site not responding. Last check: )
The bitmaps will then be available for use when a node size interval of between 1 and 240 is selected by a node size expression, when the global shape has been set to "entity" on the Shapes dialog box, and the node size status has been set to "size:color".
GNE treats the lower-left pixel of the bitmap as an indicator of the color to be drawn transparently.
Bitmaps do not seem to slow GNE's various operations by any significant degree, but metafiles and plot files from networks can become quite big if there are many nodes with large bitmaps.
my.execpc.com /BA/71/ajh/bitmaps.htm   (601 words)

  
 Bitmaps Overview in Graphics
The Bitmaps API provides concrete implementations for bitmap devices of the abstract drawing device and context interfaces defined in the Graphics API.
The font and bitmap server manages sharing of fonts and bitmaps between clients, though the client/server access is hidden by the API.
It is used to encapsulate bitmaps in all graphics operations.
www.symbian.com /developer/techlib/v70docs/sdl_v7.0/doc_source/DevGuides/cpp/Graphics/BitmapsOverview.guide.html   (262 words)

  
 Adventures with Bitmaps and Vectors
The data in a bitmap file is essentially saved as sequences of pixel addresses and color values, and they are drawn to the screen with little processing.
You can think of bitmaps as giving instructions to a pen that moves back and forth across the grid, row by row, coloring each pixel in order.
While the vector file format can be much more compact than bitmaps, it requires more effort to render it on the screen, because each shape has to be evaluated and converted to the individual pixel coordinates that it describes.
www.galaxygoo.org /resources/bitmaps_vectors.html   (1524 words)

  
 Bitmap
Bitmaps work by dividing up an image into a grid (which may be rectangular or square).
Bitmaps are widely used by computers and peripherals, both as a permanent storage format (see Bitmap File Formats), and in computer memory for displaying and manipulating images.
If a bitmap is scaled down, then as there will be less pixels after scaling, but each pixel can only contain a single color, some data (usually fine detail) will be lost.
www.graphicsacademy.com /what_bitmap.php   (365 words)

  
 Bitmaps and Pixmaps
The depth of a pixmap is the number of bits per pixels.
Bitmaps are simply pixmaps with a depth of 1.
Pointer to a place to store a bitmap representing the transparency mask of the XPM file.
www.gtk.org /api/2.6/gdk/gdk-Bitmaps-and-Pixmaps.html   (756 words)

  
 Adobe - TechNote : Bitmaps shift in Macromedia Flash   (Site not responding. Last check: )
Bitmaps can appear different in the Macromedia Flash editor than in the SWF or in the browser when viewed on a machine with display set to 32-bit color.
Flash occasionally exhibits odd behavior calculating the position of the bitmap on screen.
If the bitmap is inside a symbol, edit the symbol and break it apart there.
www.adobe.com /support/flash/ts/documents/bitmaps_shift.htm   (266 words)

  
 Bitmaps / Vector Graphics   (Site not responding. Last check: )
A bitmap is an image which is made up of tiny squares of colour.
In terms of the amount of digital storage, bitmaps are memory intensive, and the higher the resolution, the larger the file size.
The other disadvantage with bitmaps is when an image is enlarged, the individual coloured squares become visible and the illusion of a smooth image is lost to the viewer.
www.ne14design.co.uk /articles/bitmaps_vectors.htm   (274 words)

  
 Bitmaps, Device Contexts and BitBlt
The nice part is that you don't even need to know which one it refers to, you can use it basically the same way, which is especially handy for writing custom drawing functions which you can then use on any of these devices without changing it for each one.
The first step is of course loading the bitmap, this is quite simple with a bitmap resource, there are no significant differences from loading other resource types.
At this point the bitmap should be on the screen, and we need to clean up after ourselves.
www.winprog.org /tutorial/bitmaps.html   (1661 words)

  
 Designing Bitmaps   (Site not responding. Last check: )
A bitmap is rectangular area of dots or pixels.
Bitmaps may be used as icons in labels, pushbuttons and togglebuttons or as graphics in Window widgets.
To design a bitmap you simply specify which pixels are to be on or off in the bitmap.
www.public.iastate.edu /~abc/design_bitmaps.html   (583 words)

  
 Bitmaps - Selteco Flash Designer Help
In no bitmap is available you will have to import it.
Select the bitmap and drag a handle to resize or to crop.
To erase a bitmap area of the same color hold CTRL key and click inside the area.
www.flashdesignerzone.com /help/bitmaps.htm   (349 words)

  
 256-Color VGA Programming in C - Bitmaps & Palette Manipulation
Without bitmaps, there would be no icons, no fancy buttons, and mouse pointers would have to be made of lines.
Once read, displaying the bitmap is relatively easy, and involves only a few memory copies to display memory.
This is very useful when animating bitmaps, which is a primary focus in the next section.
www.brackeen.com /vga/bitmaps.html   (891 words)

  
 avalite : “Why do my bitmaps look blurry?” by Anthony Hodsdon & Miles Cohen
As a lot of you have surmised, the central reason for this is that WPF is a resolution independent framework: instead of talking about pixels, we talk about inches(or more precisely, DIPs, which are defined to be 1/96th of an inch).
This essentially means two things: the DPI of the bitmap has to be the same as the DPI of the device and the top-left-hand corner of the bitmap needs to be an integral number of pixels from the top-left-hand corner of the device.
Ensure that the bitmap is placed an integral number of pixels from the top-left-hand corner of the device.
blogs.msdn.com /seema/archive/2006/11/07/why-do-my-bitmaps-look-blurry-by-anthony-hodsdon-miles-cohen.aspx   (967 words)

  
 bitmaps and vector graphics - indezine.com - powerpoint, presentations
Bitmap graphics, also known as "raster graphics," are composed of very small dots of the same or different color that are placed so closely to each other that the human eye perceives them not as dots, but as a picture--for example, a photograph.
Bitmaps can also be designs created from scratch in an image editor and paint program.
Vector to bitmap conversions are also common, but the other way round is not too common--mainly because it's not possible unless you use a tracing program like Adobe Streamline or CorelTRACE--and even then, results are time-consuming and not too great unless you are ready to spend time and experiment with the results.
www.indezine.com /articles/bitmapvectors.html   (610 words)

  
 Windows API Tutorial: Bitmaps
Since a bitmap is a resource (in the Resource Management sense), the first step is to encapsulate it in a "strong pointer" type of interface.
You have to specify the dimensions of the bitmap and you have to provide a device context (Canvas) for which the bitmap is targeted.
The mask is a monochrome bitmap that has fl areas where we want the sprite to be transparent.
www.relisoft.com /win32/bitmap.html   (1640 words)

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