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Pictures/!Translatr/Docs/Guide
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
Tape/disk: | Home » Archimedes archive » Micro User » MU 1991-02.adf » PD-Stuff |
Filename: | Pictures/!Translatr/Docs/Guide |
Read OK: | ✔ |
File size: | 6F9E bytes |
Load address: | 0000 |
Exec address: | 0000 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- Archimedes archive » Micro User » MU 1990-11.adf » PD-Stuff » Graphics/!Translatr/Docs/Guide
- Archimedes archive » Micro User » MU 1991-02.adf » PD-Stuff » Pictures/!Translatr/Docs/Guide
File contents
_______________________________________________________________________________ Translator 6.00 ------------------------------- This program is PUBLIC DOMAIN Version date : 21 Jun 1990 ------------------------------- ---------------- - Introduction - ---------------- Translator will translate image files from other computers to the Archimedes. The following image files are supported : - Atari PI1,PI2,PI3,PC1,PC2,PC3 files (320x200x16, 640x200x4 and 640x400x2, uncompressed and compressed) - Atari IMG files (monochrome only) - Amiga IFF files (including HAM and halfbright modes) - MacIntosh MacPaint files (576x720x2 b/w) - GIF (Graphics Interchange Format) files - Archimedes' sprite files - ProArtisan compressed (type 0 and 1) files (640x256x256) - Watford digitiser files (512x256x64 greys) - Render Bender files (256 colour mode images) - AIM files (256x256x256 greys) - SUN Microsystems files (1/8-bit per pixel uncompressed) - PCX files (2/4/16-colour EGA and 256-colour MCGA) - TIFF files (bilevel, greyscale and palette colour, also known as TIFF Classes B,G and P, uncompressed, 1,2,4 or 8 bits per pixel) - QRT RAW (24-bit RGB) files (Quick Ray Tracer) - ArVis Videographics (15-bit RGB) files (2 sprite files in HIP/LOP dirs) - Translator's own 'Clear' files (pure 24-bits RGB and up to 8 bit per pixel with palette, any resolution, refer to 'Clear files' for more information) ------------------------- - Using the application - ------------------------- To start up Translator, double-click on the '!Translatr' icon. It will install itself on the icon bar, and clicking MENU on Translator's icon will give the usual 'Info' and 'Quit' options. Clicking SELECT or ADJUST will pop up the options menu, but most options will not be selectable at this stage. Loading an image can be done in three ways : a) by dragging the image file to the Translator icon on the icon bar b) by dragging the image file to the image window (when an image is loaded) c) by double-clicking on an image file (not for 'native' Archimedes formats, to ensure that the originating programs (when loaded) 'catch' these files, not Translator) NOTE : The ArVis Videographics format consists of two sprite files per image, of which one resides in a directory named 'HIP', the other in a directory called 'LOP' (both at the same directory level). To load an ArVis image, drag the sprite file in the 'HIP' directory to Translator (i.e. a or b). Image files should be filetyped appropiately to be recognized by Translator. The following filetypes are used by Translator (the filetypes in the range &690-&6xx are new filetypes, used for foreign formats) : ------------------------------------------------------------------------- Filetype Name Image file type/origin ------------------------------------------------------------------------- &004 AIM AIM (Archimedes Image Manager) &690 *Clear Translator Clear &691 *Degas Atari PI1,PI2,PI3,PC1,PC2,PC3 &692 *Img Atari IMG &693 !*AmigaIFF Amiga IFF (ILBM) &694 *MacPaint MacIntosh MacPaint &695 !*GIF GIF (Graphics Interchange Format) &696 !*SUN SUN Microsystems &697 *PCX PC PCX &698 *QRT QRT (Quick Ray Tracer) RAW &D58 RendPic Render Bender &DE2 ProArt ProArtisan &DFA Picture Watford digitiser &FF0 !*TIFF TIFF (Tag Image File Format) &FF9 Sprite Standard Archimedes sprite file (or ArVis, see above) ------------------------------------------------------------------------- A '*' indicates which filetypes also load by method c) (see above). A '!' indicates which filetypes can be recognized and loaded without having the correct filetype. They automatically get the right filetype. Every new filetype is represented in filer windows by its own icon, which is similar to Translator's iconbar icon. When succesfully processed, the image will appear in a resizable, scrollable window. Images which cannot be displayed in full can still be examined in full detail by using the window's scroll bars and the various zoom functions. -------------------- - The options menu - -------------------- Clicking MENU on the image window (when an image is loaded) or clicking SELECT or ADJUST on the iconbar icon will pop up the options menu : -------------- | Image info | -------------- This icon gives access to an information window, in which the resolution, compression technique, filename, etc. of the image is displayed. ---------- | Pop up | ---------- This icon gives access to a submenu in which options can be set that influence the way that the image first appears when succesfully processed : 'Auto mode' Clicking this icon will toggle the 'auto mode' flag. When it is ON (i.e. ticked) Translator will select the most suitable mode for display of the image for you when the image appears in its window. When OFF, you can/must choose the mode yourself (possibly using the image information provided under 'Image info'). 'Auto palette' Clicking this icon will toggle the 'auto palette' flag. When it is ON (i.e. ticked) Translator will select the 'Image palette' (see below) automatically when the image appears in its window. When OFF, the palette remains unchanged. 'Auto zoom' Clicking this icon will toggle the 'Auto zoom' flag. When it is ON, then Translator will attempt to zoom out (never in though) on the image so that it fits entirely on the current mode's screen. When OFF (default), no auto-zoom will be attempted (1:1). 'Mode set' This icon gives access to a submenu of 'mode sets'. When one of these mode sets is 'active' (default is none), selection of the mode for display of the image will be via this mode set. Each mode set consists of four mode numbers, for 2,4,16 and 256 colour display requirements of the image respectively. There are two standard sets : 'Normal' (modes 0,8,12 and 15, all 640x256 pixels) is for users of all monitors, 'Multisync' (modes 18,19,20 and 21, all 640x512 pixels) is for users of multisync monitors only. A third set is user-definable and must contain the four required mode numbers seperated by comma's (for 2,4,16 and 256 colours respectively). Selecting 'None' in this submenu will switch off the mode set option (so the 'closest' mode will always be selected, as normal). -------------- | Processing | -------------- This icon gives access to a submenu in which options can be set that influence the way in which the image is processed : 'Clear output' When this icon is ticked, a 'Clear' file will be created from the next image loaded into Translator. This icon gives access to a file window, in which a Clear file may be 'opened' by dragging the filetype icon to a filer window. By clicking on this icon, Clear output is cancelled and the last opened Clear file (which is always empty at this stage) is deleted. Refer to 'Clear files' for more information. 'Output mode' The output mode for the image may be freely chosen. This icon gives access to a submenu, in which two choices of output mode may be selected : - Auto When this icon is selected (i.e. ticked), Translator will determine the best possible output mode (and palette) to display the image. For example, for pure RGB and 256 colour images, a 256 colour mode (with at least the required resolution) will be chosen for output, whereas if the image has 5-16 colours, or 3-4, or 1-2, a 16, 4 or 2 colour mode respectively. The 'Auto' setting is the default setting, as you will usually want the highest image quality. The palette is not changed in 256 colour modes (i.e. the standard palette is used, a 'principle' that can be found in more places throughout Translator), while in other modes the image's 'exact' palette is used for optimal results. - Current When this icon is selected (i.e. ticked), the current mode will always be used as the output mode, and thus also determines the number of colours in the resulting Archimedes image. This may be useful when the quality of the image is not of the utmost importance, but other considerations play a major role. For example, if you wish to create a desktop icon based on some image, or you want the resulting image to be usable by Artisan (which can only work in 16 colour modes, in contrast to Pro-Artisan), you may specifically select a 16-colour mode for output. When this icon is ticked, the 'Output palette' icon also gives you control over the output palette (see its discussion below). 'Error spreading' (see below) will help to still reach a result as close as possible to the original, given the limited number of colours and non-ideal palettes that may be chosen. 'Output palette' This icon gives access to a submenu in which a choice for the output palette may be made. NOTE : This is only effective when 'Current' is selected in the 'Output mode' submenu, as when 'Auto' is selected, Translator determines the best possible output palette. - Current When this icon is selected (i.e. ticked), the current palette is used for the output image. Usually this is the desktop palette (ideal for creating icons), but via either palette file loading or palette manipulation by hand (via the palette utility), any palette may be chosen. In 256 colour modes however, the output palette used is ALWAYS the standard palette. There are some example palette files for 16 colour modes in the 'Palette16' directory. These contain palettes that divide the 4 available colourbits between red, green and blue (i.e. 2,1,1 or 1,2,1 or 1,1,2 respectively). - Default When this icon is selected (i.e. ticked), the current mode's default palette is used (as following a VDU20). In 16 colour modes, the upper eight 'flashing' colours are not used. - Greyscale When this icon is selected (i.e. ticked), a greyscale from black up to full white will be used. This may be especially useful for black and white images. 'Scaling' This icon gives access to a submenu with a further submenu leading to the 'x' (width) and 'y' (height) scaling factors. The scaling factors may be entered as 'multiplier:divisor', defining the scaling ratio in which the multiplier is smaller or equal to the divisor (i.e. you can only scale down). The ratio is automatically divided down to the lowest form, so you may enter any ratio that seems convenient. For example, to scale down a, say, 640x512 pixel image to 600x480 pixels, you may use 600:640 and 480:512 scaling factors for 'x' and 'y' respectively. When scaling is active (i.e. not 1:1), the 'Scaling' icon will be ticked. Clicking on the '1:1' icon will reset the scaling factors to normal. In general you will not need to scale an image down, because the save and zoom options can scale down a full image equally well. However, whenever error spreading is active, you are likely to get a much better quality if you first scale down the image (by setting the appropiate scaling factors here) and then save it in full. This is because, after error r rding, every pixel's 'neighbor' usually contains a correction for the pixel's true colour, and when scaling down with the 'Save' or 'Zoom' options, you lose many of these 'neighbor' pixels, and the error spreading effect is completely lost (or worse). When you 'pre-scale' the image before error r rding and do not scale it down further afterwards, you will retain the full image quality. 'Error spreading' Clicking this icon will toggle the 'error r rding' flag. When it is ON (i.e. ticked), errors made by the approximation of the input pixels' RGB valus in all output modes are are ad out along pixel rows. This results in images with a much higher quality, so you will usually leave it ON. When you switch it OFF only the best approximations to colours are used. You may want to do this to compare results. When there are enough colours and the ideal palette can be selected, i.e. always in non-256 colour modes when 'Auto' mode is on (see above), error spreading will obviously have no effect (or use). 'Black and white' Clicking this icon toggles the 'black and white' flag. When it is ON (i.e. ticked), Translator translates colour images to grey images. In >16-colour images, this gives very good results when used in combination with error spreading (see 'Error spreading'). For images with 16 or less colours, only the palette is changed to the closest greys. 'Zig zag' Clicking this icon will toggle the 'zig zag' flag. When it is ON, and error spreading is also ON, every other line will be plotted in the opposite direction, i.e. left to right, then right to left, then left to right again, etc.. This reduces the chances of patterning effects in the final image. Sometimes, however, the effect is not so pleasing, so you may switch it off. When OFF, lines are always plotted left to right. 'RGB resolution' This icon gives access to a window in which the amount of red, green and blue in the resulting image can be defined. The slider values for red, green and blue represent the number of bits (0-8) of the corresponding primary colour that are 'let through' in the final image. You can drag the sliders to change the number of bits (a full bar is 8 bits). For example, red=8, green=0, blue=0 will give a red seperation of the input image, i.e. only the red components of the colours are let through. Depending on how many bits are reserved for each of the primary colours in each graphics format (mostly 8 bits giving 24-bit RGB, but sometimes 4 bits or less), a large range of effects and colour seperations can be achieved. 'Screen blanking' Clicking on this icon toggles the 'Screen blanking' flag. When it is ON (i.e. ticked), the screen will be blanked while unpacking an image. This may speed up the unpacking considerably when working in high resolution modes (with high video DMA overheads). When it is OFF (default), the screen will not be blanked while unpacking (so you'll have to wait a bit longer...). 'Invert RGB' Clicking on this icon toggles the 'Invert RGB' flag. When it is ON (i.e. ticked), the colours in the image will be processed 'inverted'. This results in 'negative' images for both colour and black and white images. 'GIF scan' Clicking on this icon toggles the 'GIF scan' flag. When it is ON (i.e. ticked), GIF files are scanned to count the number of pictures in them. This number will appear in the image information. When the GIF image contains more than one image (which is rare), you may select one by using the 'Image number' option (see below). When OFF, GIF files are NOT scanned, and are assumed to contain a single image (which is usually so). This has the advantage of substantially reducing the loading time. The image info will reflect the unknown number of images in the file by displaying a '?' instead of the image count. 'Image number' GIF image files may contain more than one image, and Archimedes sprite files may contain more than one sprite. When this is the case, the image info window will indicate this. By default the first image or sprite is displayed, but, by altering this writable icon to 'n', the n-th image or sprite will be chosen when the file is (re)loaded into Translator. When the nth image is not present, Translator will complain (except when dealing with GIF files and the 'GIF scan' flag is OFF). ----------------- | Image Palette | ----------------- Clicking on this icon selects the currently loaded image's own (or 'output') palette. It is selected by default when the 'Auto palette select' flag is on, after the image is loaded. Note that this MAY make things badly (or not at all!) visible (e.g. menu's, etc.). Re-selecting the image's palette may be necessary after using the desktop's palette utility (e.g. 'Default') or when some other application changes the palette. -------------- | Zoom image | -------------- This icon gives access to a submenu of zoom options : 'In', 'Out' These icons give access to zoom in and zoom out options respectively. Zooming takes place in steps of 2 (i.e. 2 times, 4 times, 8 times enlarged/reduced, etc.). By clicking one of the icons given in their submenu's, zooming can be performed in x ('x') or y ('y') directions individually, or both at the same time ('Both'). '1:1' Clicking this icon will reset the zoom factors to 1 (i.e. the image is neither enlarged nor scaled down). ---------------- | Rotate image | ---------------- This will rotate the image clockwise by 90 degrees. This may be convenient with high-and-narrow images (especially on normal monitors), so more of the image can be on-screen without you having to use the scroll bars. ---------------- | Mirror image | ---------------- This icon gives access to two mirror options. Clicking 'x' will mirror the image horizontally, while 'y' will mirror it vertically. ------------------- | Include palette | ------------------- Clicking this icon will toggle the 'include palette' flag. When it is ON (i.e. ticked) any saves will save the current palette with the sprite. When OFF, no palette is saved with the image. -------------- | Save image | -------------- This icon gives access to a submenu of five ways in which (part of) the image may be saved : 'Full' This will save the whole image as a single sprite, exactly as it is stored internally (i.e. without losing pixels). The sprite can then be used in full (e.g. dumped to a printer with suitable software), or scaled as required by another application (e.g. a DTP package). The palette saved (when the 'include palette' flag is ON) will always be the image's own palette (not the current one, as with the other 'saves'). NOTE : In 256 colour modes, the palette will NOT be saved, regardless of the 'Include palette' flag, as Translator never changes the palette in these modes. 'Whole', 'Whole (scaled)', 'Part', 'Part (scaled)' These will display the image on the current mode's screen, using the currently selected palette, and save an editable part of the on-screen image to a sprite file. By selecting one of these four 'saves', you can choose whether or not you want to scale the image (the '(scaled)' saves will let you do this), and whether or not to cut out a specific piece (the 'Part' saves will let you do this, the 'Whole' saves won't), prior to saving. The palette saved (if the 'include palette' flag is ON) will be the current one, i.e. a la *SCREENSAVE. While scaling and/or cutting, the mouse pointer will continuously show the size of the scaled or cut-out image in pixels, or the pixel coordinates of the mouse pointer before clicking on the top left corner of a cut-out. Saving is done by dragging the sprite file icon (which appears before any scaling or cutting is done) to a directory viewer. Alternatively, you may save the image sprite directly into another application (e.g. !Paint), by dragging it to the application's iconbar icon or one of its windows. ---------- | Status | ---------- This icon gives access to a submenu of status handling functions. A default status can be created, which contains the Auto mode select, Auto palette select, Error spreading, Black and white, Auto zoom, Screen blanking, Invert RGB, GIF scan, Include palette and Zig zag flags and the Mode set. The 'Save' option will save the current status of the abovementioned items as the default. This default status file (when present) will be loaded on startup, or explicitly with the 'Load' option in the submenu (to override the current ones). The 'Kill' option will remove the default status file, so the 'standard' (Translator) defaults will be used on the next startup. --------------- | Clear files | --------------- Translator can output its own graphics file format, called 'Clear' (filetype &690). I devised this (simple to use) new filetype because of several shortcomings of Archimedes sprite files (which were the only output) : - Pure RGB input (Amiga IFF HAM, QRT, ArVis) at best ends up in a 256 colour sprite with standard palette on which error spreading has been applied. This loses a lot of image information. - 'Palette and pixel value' input (i.e. the rest of the formats) always lose any extra bits in their palette definitions if they use more than 4 per primary colour (which is the maximum on the Archimedes). In addition, output in 256 colour sprites will always lose palette definition because of the inability to fully define all 256 colours (and thus the error spreading makes the best out of the standard palette). Without being able to output a 'fully accurate' filetype, it would thus be impossible, in most cases, to retain the full resolution (both in terms of pixels and colour definition) of input images. This may be essential if the images that Translator can read are to be put to more serious use, for example image manipulation, or conversion to other formats (!MakeGIF and !MakeTIFF !). Also, I envisaged that it should be very easy to extract the image data from this 'fully accurate' format, so people can quickly and easily write simple programs to process it (i.e. no compression, no 'pixel value packing', etc.). The 'Clear' graphics format was devised because of all this, and holds either pure 24-bit RGB data or byte-wide pixel values with a 24-bit RGB palette (one entry per pixel value). The full format is as follows (the descriptions are necessarily 'formal' to avoid misinterpretation, the format is actually extremely simple) : Offset Bytes Description ---------------------------------------------------------------------------- 0 m Maker (string, e.g. 'Translator') m 1 0 (string terminator) m+1 4 Version number (600 currently, i.e. 6.00) m+5 4 Width of image in pixels (w) m+9 4 Height of image in pixels (h) m+13 4 Bits per pixel (bpp) If 1<=bpp<=8, then 24-bit palette entries for all colours follow (i.e. n=3*2^bpp, and l (bytes per pixel) is 1). If bpp>8, then pure 24-bit RGB is stored, which needs no palette (i.e. n=0, and l (bytes per pixel) is 3) m+17 n Palette entries for all colours (only if 1<=bpp<=8), which are triples of byte values (0=off, up to 255=full intensity) per primary colour, red first, then green, then blue. For example, when 'Rx','Gx' and 'Bx' represent the intensities of red, green and blue respectively for colour x, the palette for 4 colours (bpp=2) would be stored : R0,G0,B0, R1,G1,B1, R2,G2,B2, R3,G3,B3. m+17+n w*h*l Pixel values, representing the image rows from top to bottom and every row from left to right. If l=1, every pixel value is a byte representing the colour number/index. If l=3 (pure 24-bit RGB), data is stored like the palette entries, i.e. red first, then green, finally blue, all byte values (0-255) representing the intensity of the corresponding primary colour for that pixel. ---------------------------------------------------------------------------- In the case of pure 24-bit RGB storage (i.e. bpp>8), bpp represents the bits of RGB resolution of the original image (i.e. 12 for Amiga IFF HAM mode, 15 for ArVis and 24 for QRT currently). If there are less than 8 bits per primary colour, lower bits are set to 0 (but do not try to deduce how many per primary colour if you don't know what the original image was). For example, in the case of�ArVis' 15 bits RGB (5 bits each for red, green and blue), the lower three bits of each pixel value are set to 0 when Translator creates the Clear file. When 1<=bpp<=8, only the lower 2^bpp pixel values of the 256 available are used. Clear files are always 'pure' representations of the input images, i.e. error spreading, black and white conversions, etc. are NEVER applied, even if they are 'on'. Clear files DO obey the scaling factors you have set however, so that you may easily create Clear files of, for example, a specified number of pixels. For example, you may scale down images to 256x256 pixel Clear files and then let a simple program (calculating greyvalues out of the pixels' RGB values) turn them into AIM files. ----------------------- | Memory requirements | ----------------------- It should be noted that memory is of the utmost importance to this application. You should reserve enough screen memory (say at least 160K when you have a normal monitor, or 320K if you own a multisync monitor) to avoid Translator not being able to display the image in an appropiate mode. Above all, Translator should of course have enough application memory available (selectable by the 'Next' slot in the task manager) to unpack the images you feed it. When Translator has too little memory free for unpacking, decompression, scratch space, sprite memory, etc., it will complain. You may choose to continue if you do so, but the resolution of the images that can be handled will not be very high. Some images are VERY hungry (for memory) ! Translator does not load the image files in whole before unpacking them, but loads them in chunks while unpacking. When more memory is free for file buffering, loading from floppy may be speeded up considerably. Translator grabs all memory available, so, as mentioned before, by adjusting the 'next' slot in the Task Manager you can make a tradeoff between memory usage and Translator's capacities for image handling and unpacking speed. --------------------- | Mode independance | --------------------- When the 'ideal' mode cannot be selected (usually because of screen memory shortage), a beep will sound and succesively lower resolution modes with the right number of colours are tried by Translator (as, within the WIMP environment, there is no telling how much memory can and will be allocated to the screen by the WIMP/desktop system). Once an image has been created, it can be displayed in any mode. In modes with the 'wrong' number of colours, Translator attempts to display the image as well as possible, as follows : - If the number of available colours is larger than the required number of colours for the image, the 'lower' part of the palette is set (<=16 colour modes) or (256 colour modes) the closest available standard colours are selected. - If there are too few colours (i.e. only in <=16 colour modes), the most frequently used colours (the 'base' colours) in the image will determine the palette, and the remaining colours will be mapped to the closest base colour. This gives acceptable results for most images (for 256-colour images in 16, 16 in 4, or 4 in 2 colour modes), up to perfect results for 256-colour grey images (for example with the black and white option on) in 16 colour modes (as it is only ever possible to display 16 different greyvalues, also in 256 colour modes). Of course, if you really want a non-ideal mode to save your image in, selecting it as the output mode in the first place (see 'Output mode' and 'Output palette') gives much better results ! ---------------- | Sprite files | ---------------- Archimedes sprites may not have a palette. If they don't, the standard palette settings in the sprite's mode is used. The palette of 256-colour sprites is always ignored (the standard one is always used). Also, if the mode contained in the sprite is a valid one (i.e. it is a valid WIMP mode and it is available on your monitor), then this is used by default. If the mode is not valid, then the 'closest' mode is determined and used as usual. ----------- | The end | ----------- If you have praise, complaints, comments, bugs(!) or information about other formats to offer me, do not hesitate to write to John Kortink Middelhuisstr. 17 7482 EL Haaksbergen The Netherlands New versions are available from the same address : just send some money to cover postage and a self-addressed envelope containing a 3.5" disc. As this application is under continuous development, you are very likely to get a more recent version ! Happy imaging !!! _______________________________________________________________________________ !!! NOTE !!! You may NOT change this application or use ANY part of it in other products without my approval. You may ay ad it freely (with *ALL* files included), but not for any profit. This software is provided 'as is'. Using it is entirely at your own risk. _______________________________________________________________________________
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Thi| 00001f80 73 20 6d 61 79 20 62 65 20 75 73 65 66 75 6c 20 |s may be useful | 00001f90 77 68 65 6e 20 74 68 65 20 71 75 61 6c 69 74 79 |when the quality| 00001fa0 0a 6f 66 20 74 68 65 20 69 6d 61 67 65 20 69 73 |.of the image is| 00001fb0 20 6e 6f 74 20 6f 66 20 74 68 65 20 75 74 6d 6f | not of the utmo| 00001fc0 73 74 20 69 6d 70 6f 72 74 61 6e 63 65 2c 20 62 |st importance, b| 00001fd0 75 74 20 6f 74 68 65 72 20 63 6f 6e 73 69 64 65 |ut other conside| 00001fe0 72 61 74 69 6f 6e 73 0a 70 6c 61 79 20 61 20 6d |rations.play a m| 00001ff0 61 6a 6f 72 20 72 6f 6c 65 2e 20 46 6f 72 20 65 |ajor role. For e| 00002000 78 61 6d 70 6c 65 2c 20 69 66 20 79 6f 75 20 77 |xample, if you w| 00002010 69 73 68 20 74 6f 20 63 72 65 61 74 65 20 61 20 |ish to create a | 00002020 64 65 73 6b 74 6f 70 20 69 63 6f 6e 20 62 61 73 |desktop icon bas| 00002030 65 64 0a 6f 6e 20 73 6f 6d 65 20 69 6d 61 67 65 |ed.on some image| 00002040 2c 20 6f 72 20 79 6f 75 20 77 61 6e 74 20 74 68 |, or you want th| 00002050 65 20 72 65 73 75 6c 74 69 6e 67 20 69 6d 61 67 |e resulting imag| 00002060 65 20 74 6f 20 62 65 20 75 73 61 62 6c 65 20 62 |e to be usable b| 00002070 79 20 41 72 74 69 73 61 6e 20 28 77 68 69 63 68 |y Artisan (which| 00002080 0a 63 61 6e 20 6f 6e 6c 79 20 77 6f 72 6b 20 69 |.can only work i| 00002090 6e 20 31 36 20 63 6f 6c 6f 75 72 20 6d 6f 64 65 |n 16 colour mode| 000020a0 73 2c 20 69 6e 20 63 6f 6e 74 72 61 73 74 20 74 |s, in contrast t| 000020b0 6f 20 50 72 6f 2d 41 72 74 69 73 61 6e 29 2c 20 |o Pro-Artisan), | 000020c0 79 6f 75 20 6d 61 79 0a 73 70 65 63 69 66 69 63 |you may.specific| 000020d0 61 6c 6c 79 20 73 65 6c 65 63 74 20 61 20 31 36 |ally select a 16| 000020e0 2d 63 6f 6c 6f 75 72 20 6d 6f 64 65 20 66 6f 72 |-colour mode for| 000020f0 20 6f 75 74 70 75 74 2e 0a 57 68 65 6e 20 74 68 | output..When th| 00002100 69 73 20 69 63 6f 6e 20 69 73 20 74 69 63 6b 65 |is icon is ticke| 00002110 64 2c 20 74 68 65 20 27 4f 75 74 70 75 74 20 70 |d, the 'Output p| 00002120 61 6c 65 74 74 65 27 20 69 63 6f 6e 20 61 6c 73 |alette' icon als| 00002130 6f 20 67 69 76 65 73 20 79 6f 75 20 63 6f 6e 74 |o gives you cont| 00002140 72 6f 6c 0a 6f 76 65 72 20 74 68 65 20 6f 75 74 |rol.over the out| 00002150 70 75 74 20 70 61 6c 65 74 74 65 20 28 73 65 65 |put palette (see| 00002160 20 69 74 73 20 64 69 73 63 75 73 73 69 6f 6e 20 | its discussion | 00002170 62 65 6c 6f 77 29 2e 0a 27 45 72 72 6f 72 20 73 |below)..'Error s| 00002180 70 72 65 61 64 69 6e 67 27 20 28 73 65 65 20 62 |preading' (see b| 00002190 65 6c 6f 77 29 20 77 69 6c 6c 20 68 65 6c 70 20 |elow) will help | 000021a0 74 6f 20 73 74 69 6c 6c 20 72 65 61 63 68 20 61 |to still reach a| 000021b0 20 72 65 73 75 6c 74 20 61 73 20 63 6c 6f 73 65 | result as close| 000021c0 20 61 73 0a 70 6f 73 73 69 62 6c 65 20 74 6f 20 | as.possible to | 000021d0 74 68 65 20 6f 72 69 67 69 6e 61 6c 2c 20 67 69 |the original, gi| 000021e0 76 65 6e 20 74 68 65 20 6c 69 6d 69 74 65 64 20 |ven the limited | 000021f0 6e 75 6d 62 65 72 20 6f 66 20 63 6f 6c 6f 75 72 |number of colour| 00002200 73 20 61 6e 64 20 6e 6f 6e 2d 69 64 65 61 6c 0a |s and non-ideal.| 00002210 70 61 6c 65 74 74 65 73 20 74 68 61 74 20 6d 61 |palettes that ma| 00002220 79 20 62 65 20 63 68 6f 73 65 6e 2e 0a 0a 27 4f |y be chosen...'O| 00002230 75 74 70 75 74 20 70 61 6c 65 74 74 65 27 0a 0a |utput palette'..| 00002240 54 68 69 73 20 69 63 6f 6e 20 67 69 76 65 73 20 |This icon gives | 00002250 61 63 63 65 73 73 20 74 6f 20 61 20 73 75 62 6d |access to a subm| 00002260 65 6e 75 20 69 6e 20 77 68 69 63 68 20 61 20 63 |enu in which a c| 00002270 68 6f 69 63 65 20 66 6f 72 20 74 68 65 20 6f 75 |hoice for the ou| 00002280 74 70 75 74 20 70 61 6c 65 74 74 65 0a 6d 61 79 |tput palette.may| 00002290 20 62 65 20 6d 61 64 65 2e 20 4e 4f 54 45 20 3a | be made. NOTE :| 000022a0 20 54 68 69 73 20 69 73 20 6f 6e 6c 79 20 65 66 | This is only ef| 000022b0 66 65 63 74 69 76 65 20 77 68 65 6e 20 27 43 75 |fective when 'Cu| 000022c0 72 72 65 6e 74 27 20 69 73 20 73 65 6c 65 63 74 |rrent' is select| 000022d0 65 64 20 69 6e 0a 74 68 65 20 27 4f 75 74 70 75 |ed in.the 'Outpu| 000022e0 74 20 6d 6f 64 65 27 20 73 75 62 6d 65 6e 75 2c |t mode' submenu,| 000022f0 20 61 73 20 77 68 65 6e 20 27 41 75 74 6f 27 20 | as when 'Auto' | 00002300 69 73 20 73 65 6c 65 63 74 65 64 2c 20 54 72 61 |is selected, Tra| 00002310 6e 73 6c 61 74 6f 72 20 64 65 74 65 72 6d 69 6e |nslator determin| 00002320 65 73 0a 74 68 65 20 62 65 73 74 20 70 6f 73 73 |es.the best poss| 00002330 69 62 6c 65 20 6f 75 74 70 75 74 20 70 61 6c 65 |ible output pale| 00002340 74 74 65 2e 0a 0a 2d 20 43 75 72 72 65 6e 74 0a |tte...- Current.| 00002350 0a 57 68 65 6e 20 74 68 69 73 20 69 63 6f 6e 20 |.When this icon | 00002360 69 73 20 73 65 6c 65 63 74 65 64 20 28 69 2e 65 |is selected (i.e| 00002370 2e 20 74 69 63 6b 65 64 29 2c 20 74 68 65 20 63 |. ticked), the c| 00002380 75 72 72 65 6e 74 20 70 61 6c 65 74 74 65 20 69 |urrent palette i| 00002390 73 20 75 73 65 64 20 66 6f 72 0a 74 68 65 20 6f |s used for.the o| 000023a0 75 74 70 75 74 20 69 6d 61 67 65 2e 20 55 73 75 |utput image. 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Clicking o| 00002990 6e 20 74 68 65 20 27 31 3a 31 27 20 69 63 6f 6e |n the '1:1' icon| 000029a0 20 77 69 6c 6c 20 72 65 73 65 74 20 74 68 65 20 | will reset the | 000029b0 73 63 61 6c 69 6e 67 20 66 61 63 74 6f 72 73 0a |scaling factors.| 000029c0 74 6f 20 6e 6f 72 6d 61 6c 2e 0a 49 6e 20 67 65 |to normal..In ge| 000029d0 6e 65 72 61 6c 20 79 6f 75 20 77 69 6c 6c 20 6e |neral you will n| 000029e0 6f 74 20 6e 65 65 64 20 74 6f 20 73 63 61 6c 65 |ot need to scale| 000029f0 20 61 6e 20 69 6d 61 67 65 20 64 6f 77 6e 2c 20 | an image down, | 00002a00 62 65 63 61 75 73 65 20 74 68 65 20 73 61 76 65 |because the save| 00002a10 20 61 6e 64 20 7a 6f 6f 6d 0a 6f 70 74 69 6f 6e | and zoom.option| 00002a20 73 20 63 61 6e 20 73 63 61 6c 65 20 64 6f 77 6e |s can scale down| 00002a30 20 61 20 66 75 6c 6c 20 69 6d 61 67 65 20 65 71 | a full image eq| 00002a40 75 61 6c 6c 79 20 77 65 6c 6c 2e 20 48 6f 77 65 |ually well. Howe| 00002a50 76 65 72 2c 20 77 68 65 6e 65 76 65 72 20 65 72 |ver, whenever er| 00002a60 72 6f 72 0a 73 70 72 65 61 64 69 6e 67 20 69 73 |ror.spreading is| 00002a70 20 61 63 74 69 76 65 2c 20 79 6f 75 20 61 72 65 | active, you are| 00002a80 20 6c 69 6b 65 6c 79 20 74 6f 20 67 65 74 20 61 | likely to get a| 00002a90 20 6d 75 63 68 20 62 65 74 74 65 72 20 71 75 61 | much better qua| 00002aa0 6c 69 74 79 20 69 66 20 79 6f 75 20 66 69 72 73 |lity if you firs| 00002ab0 74 0a 73 63 61 6c 65 20 64 6f 77 6e 20 74 68 65 |t.scale down the| 00002ac0 20 69 6d 61 67 65 20 28 62 79 20 73 65 74 74 69 | image (by setti| 00002ad0 6e 67 20 74 68 65 20 61 70 70 72 6f 70 69 61 74 |ng the appropiat| 00002ae0 65 20 73 63 61 6c 69 6e 67 20 66 61 63 74 6f 72 |e scaling factor| 00002af0 73 20 68 65 72 65 29 20 61 6e 64 20 74 68 65 6e |s here) and then| 00002b00 0a 73 61 76 65 20 69 74 20 69 6e 20 66 75 6c 6c |.save it in full| 00002b10 2e 20 54 68 69 73 20 69 73 20 62 65 63 61 75 73 |. This is becaus| 00002b20 65 2c 20 61 66 74 65 72 20 65 72 72 6f 72 20 72 |e, after error r| 00002b30 20 72 64 69 6e 67 2c 20 65 76 65 72 79 20 70 69 | rding, every pi| 00002b40 78 65 6c 27 73 0a 27 6e 65 69 67 68 62 6f 72 27 |xel's.'neighbor'| 00002b50 20 75 73 75 61 6c 6c 79 20 63 6f 6e 74 61 69 6e | usually contain| 00002b60 73 20 61 20 63 6f 72 72 65 63 74 69 6f 6e 20 66 |s a correction f| 00002b70 6f 72 20 74 68 65 20 70 69 78 65 6c 27 73 20 74 |or the pixel's t| 00002b80 72 75 65 20 63 6f 6c 6f 75 72 2c 20 61 6e 64 20 |rue colour, and | 00002b90 77 68 65 6e 0a 73 63 61 6c 69 6e 67 20 64 6f 77 |when.scaling dow| 00002ba0 6e 20 77 69 74 68 20 74 68 65 20 27 53 61 76 65 |n with the 'Save| 00002bb0 27 20 6f 72 20 27 5a 6f 6f 6d 27 20 6f 70 74 69 |' or 'Zoom' opti| 00002bc0 6f 6e 73 2c 20 79 6f 75 20 6c 6f 73 65 20 6d 61 |ons, you lose ma| 00002bd0 6e 79 20 6f 66 20 74 68 65 73 65 0a 27 6e 65 69 |ny of these.'nei| 00002be0 67 68 62 6f 72 27 20 70 69 78 65 6c 73 2c 20 61 |ghbor' pixels, a| 00002bf0 6e 64 20 74 68 65 20 65 72 72 6f 72 20 73 70 72 |nd the error spr| 00002c00 65 61 64 69 6e 67 20 65 66 66 65 63 74 20 69 73 |eading effect is| 00002c10 20 63 6f 6d 70 6c 65 74 65 6c 79 20 6c 6f 73 74 | completely lost| 00002c20 20 28 6f 72 0a 77 6f 72 73 65 29 2e 20 57 68 65 | (or.worse). Whe| 00002c30 6e 20 79 6f 75 20 27 70 72 65 2d 73 63 61 6c 65 |n you 'pre-scale| 00002c40 27 20 74 68 65 20 69 6d 61 67 65 20 62 65 66 6f |' the image befo| 00002c50 72 65 20 65 72 72 6f 72 20 72 20 72 64 69 6e 67 |re error r rding| 00002c60 20 61 6e 64 20 64 6f 20 6e 6f 74 0a 73 63 61 6c | and do not.scal| 00002c70 65 20 69 74 20 64 6f 77 6e 20 66 75 72 74 68 65 |e it down furthe| 00002c80 72 20 61 66 74 65 72 77 61 72 64 73 2c 20 79 6f |r afterwards, yo| 00002c90 75 20 77 69 6c 6c 20 72 65 74 61 69 6e 20 74 68 |u will retain th| 00002ca0 65 20 66 75 6c 6c 20 69 6d 61 67 65 20 71 75 61 |e full image qua| 00002cb0 6c 69 74 79 2e 0a 0a 27 45 72 72 6f 72 20 73 70 |lity...'Error sp| 00002cc0 72 65 61 64 69 6e 67 27 0a 0a 43 6c 69 63 6b 69 |reading'..Clicki| 00002cd0 6e 67 20 74 68 69 73 20 69 63 6f 6e 20 77 69 6c |ng this icon wil| 00002ce0 6c 20 74 6f 67 67 6c 65 20 74 68 65 20 27 65 72 |l toggle the 'er| 00002cf0 72 6f 72 20 72 20 72 64 69 6e 67 27 20 66 6c 61 |ror r rding' fla| 00002d00 67 2e 20 57 68 65 6e 20 69 74 20 69 73 20 4f 4e |g. When it is ON| 00002d10 20 28 69 2e 65 2e 0a 74 69 63 6b 65 64 29 2c 20 | (i.e..ticked), | 00002d20 65 72 72 6f 72 73 20 6d 61 64 65 20 62 79 20 74 |errors made by t| 00002d30 68 65 20 61 70 70 72 6f 78 69 6d 61 74 69 6f 6e |he approximation| 00002d40 20 6f 66 20 74 68 65 20 69 6e 70 75 74 20 70 69 | of the input pi| 00002d50 78 65 6c 73 27 20 52 47 42 20 76 61 6c 75 73 20 |xels' RGB valus | 00002d60 69 6e 0a 61 6c 6c 20 6f 75 74 70 75 74 20 6d 6f |in.all output mo| 00002d70 64 65 73 20 61 72 65 20 61 72 65 20 61 64 20 6f |des are are ad o| 00002d80 75 74 20 61 6c 6f 6e 67 20 70 69 78 65 6c 20 72 |ut along pixel r| 00002d90 6f 77 73 2e 20 54 68 69 73 20 72 65 73 75 6c 74 |ows. This result| 00002da0 73 20 69 6e 20 69 6d 61 67 65 73 0a 77 69 74 68 |s in images.with| 00002db0 20 61 20 6d 75 63 68 20 68 69 67 68 65 72 20 71 | a much higher q| 00002dc0 75 61 6c 69 74 79 2c 20 73 6f 20 79 6f 75 20 77 |uality, so you w| 00002dd0 69 6c 6c 20 75 73 75 61 6c 6c 79 20 6c 65 61 76 |ill usually leav| 00002de0 65 20 69 74 20 4f 4e 2e 0a 57 68 65 6e 20 79 6f |e it ON..When yo| 00002df0 75 20 73 77 69 74 63 68 20 69 74 20 4f 46 46 20 |u switch it OFF | 00002e00 6f 6e 6c 79 20 74 68 65 20 62 65 73 74 20 61 70 |only the best ap| 00002e10 70 72 6f 78 69 6d 61 74 69 6f 6e 73 20 74 6f 20 |proximations to | 00002e20 63 6f 6c 6f 75 72 73 20 61 72 65 20 75 73 65 64 |colours are used| 00002e30 2e 0a 59 6f 75 20 6d 61 79 20 77 61 6e 74 20 74 |..You may want t| 00002e40 6f 20 64 6f 20 74 68 69 73 20 74 6f 20 63 6f 6d |o do this to com| 00002e50 70 61 72 65 20 72 65 73 75 6c 74 73 2e 20 57 68 |pare results. Wh| 00002e60 65 6e 20 74 68 65 72 65 20 61 72 65 20 65 6e 6f |en there are eno| 00002e70 75 67 68 20 63 6f 6c 6f 75 72 73 20 61 6e 64 0a |ugh colours and.| 00002e80 74 68 65 20 69 64 65 61 6c 20 70 61 6c 65 74 74 |the ideal palett| 00002e90 65 20 63 61 6e 20 62 65 20 73 65 6c 65 63 74 65 |e can be selecte| 00002ea0 64 2c 20 69 2e 65 2e 20 61 6c 77 61 79 73 20 69 |d, i.e. always i| 00002eb0 6e 20 6e 6f 6e 2d 32 35 36 20 63 6f 6c 6f 75 72 |n non-256 colour| 00002ec0 20 6d 6f 64 65 73 20 77 68 65 6e 0a 27 41 75 74 | modes when.'Aut| 00002ed0 6f 27 20 6d 6f 64 65 20 69 73 20 6f 6e 20 28 73 |o' mode is on (s| 00002ee0 65 65 20 61 62 6f 76 65 29 2c 20 65 72 72 6f 72 |ee above), error| 00002ef0 20 73 70 72 65 61 64 69 6e 67 20 77 69 6c 6c 20 | spreading will | 00002f00 6f 62 76 69 6f 75 73 6c 79 20 68 61 76 65 20 6e |obviously have n| 00002f10 6f 20 65 66 66 65 63 74 0a 28 6f 72 20 75 73 65 |o effect.(or use| 00002f20 29 2e 0a 0a 27 42 6c 61 63 6b 20 61 6e 64 20 77 |)...'Black and w| 00002f30 68 69 74 65 27 0a 0a 43 6c 69 63 6b 69 6e 67 20 |hite'..Clicking | 00002f40 74 68 69 73 20 69 63 6f 6e 20 74 6f 67 67 6c 65 |this icon toggle| 00002f50 73 20 74 68 65 20 27 62 6c 61 63 6b 20 61 6e 64 |s the 'black and| 00002f60 20 77 68 69 74 65 27 20 66 6c 61 67 2e 20 57 68 | white' flag. Wh| 00002f70 65 6e 20 69 74 20 69 73 20 4f 4e 20 28 69 2e 65 |en it is ON (i.e| 00002f80 2e 0a 74 69 63 6b 65 64 29 2c 20 54 72 61 6e 73 |..ticked), Trans| 00002f90 6c 61 74 6f 72 20 74 72 61 6e 73 6c 61 74 65 73 |lator translates| 00002fa0 20 63 6f 6c 6f 75 72 20 69 6d 61 67 65 73 20 74 | colour images t| 00002fb0 6f 20 67 72 65 79 20 69 6d 61 67 65 73 2e 20 49 |o grey images. I| 00002fc0 6e 20 3e 31 36 2d 63 6f 6c 6f 75 72 0a 69 6d 61 |n >16-colour.ima| 00002fd0 67 65 73 2c 20 74 68 69 73 20 67 69 76 65 73 20 |ges, this gives | 00002fe0 76 65 72 79 20 67 6f 6f 64 20 72 65 73 75 6c 74 |very good result| 00002ff0 73 20 77 68 65 6e 20 75 73 65 64 20 69 6e 20 63 |s when used in c| 00003000 6f 6d 62 69 6e 61 74 69 6f 6e 20 77 69 74 68 20 |ombination with | 00003010 65 72 72 6f 72 0a 73 70 72 65 61 64 69 6e 67 20 |error.spreading | 00003020 28 73 65 65 20 27 45 72 72 6f 72 20 73 70 72 65 |(see 'Error spre| 00003030 61 64 69 6e 67 27 29 2e 20 46 6f 72 20 69 6d 61 |ading'). For ima| 00003040 67 65 73 20 77 69 74 68 20 31 36 20 6f 72 20 6c |ges with 16 or l| 00003050 65 73 73 20 63 6f 6c 6f 75 72 73 2c 20 6f 6e 6c |ess colours, onl| 00003060 79 0a 74 68 65 20 70 61 6c 65 74 74 65 20 69 73 |y.the palette is| 00003070 20 63 68 61 6e 67 65 64 20 74 6f 20 74 68 65 20 | changed to the | 00003080 63 6c 6f 73 65 73 74 20 67 72 65 79 73 2e 0a 0a |closest greys...| 00003090 27 5a 69 67 20 7a 61 67 27 0a 0a 43 6c 69 63 6b |'Zig zag'..Click| 000030a0 69 6e 67 20 74 68 69 73 20 69 63 6f 6e 20 77 69 |ing this icon wi| 000030b0 6c 6c 20 74 6f 67 67 6c 65 20 74 68 65 20 27 7a |ll toggle the 'z| 000030c0 69 67 20 7a 61 67 27 20 66 6c 61 67 2e 20 57 68 |ig zag' flag. Wh| 000030d0 65 6e 20 69 74 20 69 73 20 4f 4e 2c 20 61 6e 64 |en it is ON, and| 000030e0 20 65 72 72 6f 72 0a 73 70 72 65 61 64 69 6e 67 | error.spreading| 000030f0 20 69 73 20 61 6c 73 6f 20 4f 4e 2c 20 65 76 65 | is also ON, eve| 00003100 72 79 20 6f 74 68 65 72 20 6c 69 6e 65 20 77 69 |ry other line wi| 00003110 6c 6c 20 62 65 20 70 6c 6f 74 74 65 64 20 69 6e |ll be plotted in| 00003120 20 74 68 65 20 6f 70 70 6f 73 69 74 65 0a 64 69 | the opposite.di| 00003130 72 65 63 74 69 6f 6e 2c 20 69 2e 65 2e 20 6c 65 |rection, i.e. le| 00003140 66 74 20 74 6f 20 72 69 67 68 74 2c 20 74 68 65 |ft to right, the| 00003150 6e 20 72 69 67 68 74 20 74 6f 20 6c 65 66 74 2c |n right to left,| 00003160 20 74 68 65 6e 20 6c 65 66 74 20 74 6f 20 72 69 | then left to ri| 00003170 67 68 74 20 61 67 61 69 6e 2c 0a 65 74 63 2e 2e |ght again,.etc..| 00003180 20 54 68 69 73 20 72 65 64 75 63 65 73 20 74 68 | This reduces th| 00003190 65 20 63 68 61 6e 63 65 73 20 6f 66 20 70 61 74 |e chances of pat| 000031a0 74 65 72 6e 69 6e 67 20 65 66 66 65 63 74 73 20 |terning effects | 000031b0 69 6e 20 74 68 65 20 66 69 6e 61 6c 20 69 6d 61 |in the final ima| 000031c0 67 65 2e 0a 53 6f 6d 65 74 69 6d 65 73 2c 20 68 |ge..Sometimes, h| 000031d0 6f 77 65 76 65 72 2c 20 74 68 65 20 65 66 66 65 |owever, the effe| 000031e0 63 74 20 69 73 20 6e 6f 74 20 73 6f 20 70 6c 65 |ct is not so ple| 000031f0 61 73 69 6e 67 2c 20 73 6f 20 79 6f 75 20 6d 61 |asing, so you ma| 00003200 79 20 73 77 69 74 63 68 20 69 74 20 6f 66 66 2e |y switch it off.| 00003210 0a 57 68 65 6e 20 4f 46 46 2c 20 6c 69 6e 65 73 |.When OFF, lines| 00003220 20 61 72 65 20 61 6c 77 61 79 73 20 70 6c 6f 74 | are always plot| 00003230 74 65 64 20 6c 65 66 74 20 74 6f 20 72 69 67 68 |ted left to righ| 00003240 74 2e 0a 0a 27 52 47 42 20 72 65 73 6f 6c 75 74 |t...'RGB resolut| 00003250 69 6f 6e 27 0a 0a 54 68 69 73 20 69 63 6f 6e 20 |ion'..This icon | 00003260 67 69 76 65 73 20 61 63 63 65 73 73 20 74 6f 20 |gives access to | 00003270 61 20 77 69 6e 64 6f 77 20 69 6e 20 77 68 69 63 |a window in whic| 00003280 68 20 74 68 65 20 61 6d 6f 75 6e 74 20 6f 66 20 |h the amount of | 00003290 72 65 64 2c 20 67 72 65 65 6e 20 61 6e 64 20 62 |red, green and b| 000032a0 6c 75 65 0a 69 6e 20 74 68 65 20 72 65 73 75 6c |lue.in the resul| 000032b0 74 69 6e 67 20 69 6d 61 67 65 20 63 61 6e 20 62 |ting image can b| 000032c0 65 20 64 65 66 69 6e 65 64 2e 20 54 68 65 20 73 |e defined. 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You can d| 00003370 72 61 67 20 74 68 65 20 73 6c 69 64 65 72 73 20 |rag the sliders | 00003380 74 6f 20 63 68 61 6e 67 65 0a 74 68 65 20 6e 75 |to change.the nu| 00003390 6d 62 65 72 20 6f 66 20 62 69 74 73 20 28 61 20 |mber of bits (a | 000033a0 66 75 6c 6c 20 62 61 72 20 69 73 20 38 20 62 69 |full bar is 8 bi| 000033b0 74 73 29 2e 0a 46 6f 72 20 65 78 61 6d 70 6c 65 |ts)..For example| 000033c0 2c 20 72 65 64 3d 38 2c 20 67 72 65 65 6e 3d 30 |, red=8, green=0| 000033d0 2c 20 62 6c 75 65 3d 30 20 77 69 6c 6c 20 67 69 |, blue=0 will gi| 000033e0 76 65 20 61 20 72 65 64 20 73 65 70 65 72 61 74 |ve a red seperat| 000033f0 69 6f 6e 20 6f 66 20 74 68 65 20 69 6e 70 75 74 |ion of the input| 00003400 0a 69 6d 61 67 65 2c 20 69 2e 65 2e 20 6f 6e 6c |.image, i.e. onl| 00003410 79 20 74 68 65 20 72 65 64 20 63 6f 6d 70 6f 6e |y the red compon| 00003420 65 6e 74 73 20 6f 66 20 74 68 65 20 63 6f 6c 6f |ents of the colo| 00003430 75 72 73 20 61 72 65 20 6c 65 74 20 74 68 72 6f |urs are let thro| 00003440 75 67 68 2e 20 44 65 70 65 6e 64 69 6e 67 0a 6f |ugh. Depending.o| 00003450 6e 20 68 6f 77 20 6d 61 6e 79 20 62 69 74 73 20 |n how many bits | 00003460 61 72 65 20 72 65 73 65 72 76 65 64 20 66 6f 72 |are reserved for| 00003470 20 65 61 63 68 20 6f 66 20 74 68 65 20 70 72 69 | each of the pri| 00003480 6d 61 72 79 20 63 6f 6c 6f 75 72 73 20 69 6e 20 |mary colours in | 00003490 65 61 63 68 20 67 72 61 70 68 69 63 73 0a 66 6f |each graphics.fo| 000034a0 72 6d 61 74 20 28 6d 6f 73 74 6c 79 20 38 20 62 |rmat (mostly 8 b| 000034b0 69 74 73 20 67 69 76 69 6e 67 20 32 34 2d 62 69 |its giving 24-bi| 000034c0 74 20 52 47 42 2c 20 62 75 74 20 73 6f 6d 65 74 |t RGB, but somet| 000034d0 69 6d 65 73 20 34 20 62 69 74 73 20 6f 72 20 6c |imes 4 bits or l| 000034e0 65 73 73 29 2c 20 61 0a 6c 61 72 67 65 20 72 61 |ess), a.large ra| 000034f0 6e 67 65 20 6f 66 20 65 66 66 65 63 74 73 20 61 |nge of effects a| 00003500 6e 64 20 63 6f 6c 6f 75 72 20 73 65 70 65 72 61 |nd colour sepera| 00003510 74 69 6f 6e 73 20 63 61 6e 20 62 65 20 61 63 68 |tions can be ach| 00003520 69 65 76 65 64 2e 0a 0a 27 53 63 72 65 65 6e 20 |ieved...'Screen | 00003530 62 6c 61 6e 6b 69 6e 67 27 0a 0a 43 6c 69 63 6b |blanking'..Click| 00003540 69 6e 67 20 6f 6e 20 74 68 69 73 20 69 63 6f 6e |ing on this icon| 00003550 20 74 6f 67 67 6c 65 73 20 74 68 65 20 27 53 63 | toggles the 'Sc| 00003560 72 65 65 6e 20 62 6c 61 6e 6b 69 6e 67 27 20 66 |reen blanking' f| 00003570 6c 61 67 2e 20 57 68 65 6e 20 69 74 20 69 73 20 |lag. 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