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diff --git a/doc/users_guide/gimp.sgml b/doc/users_guide/gimp.sgml deleted file mode 100644 index d8e5ae3..0000000 --- a/doc/users_guide/gimp.sgml +++ /dev/null @@ -1,886 +0,0 @@ - - <chapter id="ch-gimp-and-gimp-print"><title>GIMP and Gutenprint</title> - - <sect1> - <title>Running the GIMP</title> - <para> - This section assumes that you have the GIMP version 1.2 installed -and working properly on your computer, and that you have an image of -some type that you desire to print. To get started quickly, log into -your system, start the X window system, and bring up your favorite terminal -window. At the $ prompt, type: - - <programlisting> - <![ CDATA [ - $ gimp & - ]]> - </programlisting> - - This should start the GIMP for you. If it does not, check that -you have installed the GIMP properly, and that its binary is located -in one of the directories listed in your $PATH environment -variable. On the assumption that this worked, the screen should now -look something like this: - - <figure><title>The Startup Window for The GIMP</title> - <mediaobject> - <imageobject> - <imagedata fileref="figures/gimp_startup.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>Startup window for The GIMP</phrase> - </textobject> - </mediaobject> - </figure> - - </para> - <para> - At this point, you should use the - - <menuchoice> - <guimenu>File</guimenu> - <guimenuitem>Open</guimenuitem> - </menuchoice> - -menu option to open your favorite picture. We will print this picture -shortly. Your picture should be displayed next to the GIMP startup -window, perhaps looking similar to the following (sssh! Don't tell -anybody the secret!): - - <figure><title>A Sample Image Displayed by The GIMP</title> - <mediaobject> - <imageobject> - <imagedata scale="50" fileref="figures/gimp_image.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>A Sample Image displayed by The Gimp</phrase> - </textobject> - </mediaobject> - </figure> - - </para> - - </sect1> - - <sect1><title>The Gimp-Print Graphical User Interface</title> - <para> - Now that the GIMP is displaying your picture, put your mouse over -the picture and click the right mouse button. A menu will appear. -Choose the - <menuchoice> - <guimenu>File</guimenu> - <guimenuitem>Print</guimenuitem> - </menuchoice> -menu option. This will cause the Gimp-Print GUI window to appear (see -<xref linkend="fig-gimp-print-gui">). Move the mouse cursor -over the various parts of the Gimp-Print GUI window, and notice that -if you leave your mouse in one place for a short time without clicking -any buttons, a small box appears. This box contains helpful text. -These small boxes are called "tooltips" and are intended to remind you -about the function of each part of the graphical interface. - </para> - <para> -The next several sections will continuously refer to -<xref linkend="fig-gimp-print-gui"> and -<xref linkend="fig-gimp-print-gui-1">. The difference between -the two figures can be seen in the top right corner of the window. -Notice that there are two tabs, one which reads -<guilabel>Printer Settings</guilabel> and another which reads -<guilabel>Image/Output Settings</guilabel>. Notice also that the -window is divided into several major sections which directly map to -the major sections of this document: - <itemizedlist> - <listitem> - <para><link linkend="sec-preview">Preview</link></para> - </listitem> - <listitem> - <para><link linkend="sec-printer-settings">Printer Settings</link></para> - </listitem> - <listitem> - <para><link linkend="sec-printer-settings">Image/Output Settings</link></para> - </listitem> - <listitem> - <para><link linkend="sec-position">Position</link></para> - </listitem> - <listitem> - <para><link linkend="sec-scaling">Size</link></para> - </listitem> - <listitem> - <para><link linkend="sec-printing-and-saving-settings">Printing and Saving Settings</link></para> - </listitem> - </itemizedlist> - </para> - - <figure id="fig-gimp-print-gui"><title>The Gimp-Print Graphical User Interface 1 (GUI)</title> - <mediaobject> - <imageobject> - <imagedata scale="40" fileref="figures/gimp-print-gui.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>The GIMP Print GUI showing printer settings</phrase> - </textobject> - </mediaobject> - </figure> - - <figure id="fig-gimp-print-gui-1"><title>The Gimp-Print Graphical User Interface 2 (GUI)</title> - <mediaobject> - <imageobject> - <imagedata scale="40" fileref="figures/gimp-print-gui-1.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>The GIMP Print GUI showing image/output settings</phrase> - </textobject> - </mediaobject> - </figure> - - <sect2><title id="sec-printer-settings">Printer Settings</title> - <indexterm id="idx-printer-settings"><primary>Printer Settings</primary></indexterm> - - <sect3><title>Printer</title> - <para> - Click on the <guilabel>Printer Settings</guilabel> tab near the -top right hand corner of the window (see -<xref linkend="fig-gimp-print-gui">). Then, click on the downward -facing arrow to the right of the <guilabel>Printer</guilabel> combo -box to see a list of the system printer queues. Select the queue to which -you would like the printed image to be sent. One may also print the -image directly to a file by selecting <guimenuitem>File</guimenuitem>. -In this event, the user will be prompted for the filename when either the -<guibutton>Print</guibutton> button or the <guibutton>Print and Save -Settings</guibutton> button is clicked. - </para> - <para> -When either the <guibutton>Print and Save Settings</guibutton> button -or the <guibutton>Save Settings</guibutton> button is clicked, -the settings are saved in a file called -<filename>~/.gimp-1.2/printrc</filename>. The user is cautioned about -hand editing this file since it is generated by Gutenprint (although -it was the only way that the author found for removing bogus entries -created while playing with the <guibutton>New Printer</guibutton> button). - </para> - </sect3> - - <sect3><title>Setup Printer</title> - <para> - Before any useful printing can occur, the user needs to associate -the named printer with the -actual make and model of the printer. Click the -<guibutton>Setup Printer</guibutton> button in -the <guilabel>Printer</guilabel> section of the window (the upper -right, and just below the Printer display box). When this is done, the -following window appears: - - <figure><title>The Setup Printer Window</title> - <mediaobject> - <imageobject> - <imagedata scale="60" fileref="figures/gimp-print-setup.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>The Setup Printer Window</phrase> - </textobject> - </mediaobject> - </figure> - </para> - - <para> - Scroll through the Printer Model section of the window until you -find a printer which matches yours. If you cannot find the precise -model, pick something close and hope for the best. There are selections -for a wide array of Postscript, inkjet, and laser printers. After you -have selected a printer, you will see the printer command displayed. - </para> - <para> -The Gutenprint software does all of the necessary conversion of the -image to be printed into the language of your printer. It is -unnecessary and undesirable for any other sofware to manipulate this -data. (This is why the command contains the "-l" switch or the "-o -raw" switch). Please use care if you feel the need to edit this -command. Once you are satisfied with your selection, click the -<guibutton>OK</guibutton> button. - </para> - - </sect3> - - <sect3><title>New Printer</title> - - <para> - In the previous sections, the user selected an existing printer -queue and associated a particular type of printer to that queue. For -most cases, this is probably all that is required. However, some -situations might require more detailed control over the handling of -the printer data. - </para> - <para> - Click the <guibutton>New Printer</guibutton> button to tell the -software that you wish to create a new name. In this case, the new -name may actually be an existing printer with different settings that -you wish to save, or it may simply be a name associated with a -particular command for handling the printer data. A window will -appear thus: - - <figure><title>The New Printer Window</title> - <mediaobject> - <imageobject> - <imagedata fileref="figures/gimp-print-new-printer.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>The New Printer Window</phrase> - </textobject> - </mediaobject> - </figure> - - Type a name into the window and click <guibutton>OK</guibutton> -(or <guibutton>Cancel</guibutton> if you wish not to do this). -Notice that the new name now appears as the selected <guilabel>Printer</guilabel>. -As you change settings in the rest of the Gimp-Print GUI, they will be -associated with this printer name. When the settings are saved, -they can be recovered easily by simply selecting this named printer -from the Printer combo box. - </para> - <para> - One example where this feature might be used is as follows. The -author frequently prints photos on Epson 4x6 photo paper. Note that -this paper is physically larger than 4x6 and it has perforations on -all four sides. The author dislikes printing part of the image on the -perforated parts of the paper which will be removed after -printing the photo. By selecting the proper scaling percentage, -printing can be constrained to the 4x6 part of the paper which will -remain after the perforated sections are removed. The author has -saved this setting using this feature of the Gutenprint software. - </para> - - </sect3> - - <sect3><title>Media Size</title> - <para> - The term <emphasis>media</emphasis> refers to paper, card stock, -envelopes, or whatever you have put into your printer onto which -something will be printed. Click the arrow to the right of the -<guilabel>Media Size</guilabel> box to see a long list of different -sizes of media. Choose the size that matches the media which you have -loaded into your printer. Once you have made your choice, the drop -down menu will disappear, and your choice will be shown in the -<guilabel>Media Size</guilabel> box. The available paper sizes will -vary depending upon the printer model you have selected. - </para> - <para> - Some printers support arbitrary (within limits!) paper sizes. - These printers will let you select <emphasis>Custom</emphasis> - or <emphasis>Roll</emphasis> paper sizes. When you select such a - printer, one or both of the <guilabel>Dimensions</guilabel> boxes - will let you enter your paper size (in inches or centimetres). The - boxes will not let you enter sizes that your printer cannot handle. - </para> - </sect3> - - <sect3><title>Media Type</title> - <para> - The type of media onto which your image will be printed should be -selected here. Click on the arrow to the right of the <guilabel>Media -Type</guilabel> box to see a long list of the different types of media -onto which you may print your image. Media types include such things -as plain paper, postcards, photo quality paper, transparencies, and -more! Once you have made your choice, the drop down menu will -disappear, and your choice will be shown in the <guilabel>Media -Type</guilabel> box. The choices available will vary depending upon -the printer model you have selected. - </para> - </sect3> - - <sect3><title>Media Source</title> - <para> - The <guilabel>Media Source</guilabel> box allows the user to - choose the paper source, sometimes called <emphasis>Input - Slot</emphasis>, that the paper will be fed from. Many printers - only have one available input source (such as the standard paper - tray), in which case this entry will be grayed out. If your printer - does support multiple input sources, you may specify the source of - your choice here. Some Epson printers offer a roll feed option in - addition to the standard paper tray, and many HP LaserJet printers - have multiple paper trays. - </para> - </sect3> - - <sect3><title>Ink Type</title> - <para> - Some printers offer a choice of different types of ink or ink - cartridges. Many Canon and Lexmark printers support various - combinations of cartridges, such as black only, black and color, - photo color, and so forth. Most Epson printers let you choose - between three and four color printing (three color uses only color - ink, while four color uses black ink as well). Epson printers that - support six color photo printing allow you to choose five and six - color printing as well. - </para> - </sect3> - - <sect3><title>Resolution</title> - <para> - Click on the arrow to the right of the -<guilabel>Resolution</guilabel> box to see a long list of resolutions -at which you can print your image. The list is written with the -lowest resolution at the top, with increasing resolution (and -generally improved printing quality) as you approach the bottom of the -list. Different printers support different resolution options, and -many printers support different quality choices using the same basic -resolution. In this menu are a few terms which may be unfamiliar to -you, and they will now be explained. - </para> - <sect4><title>DPI</title> - <para> - DPI is an acronym which stands for <emphasis>D</emphasis>ots -<emphasis>P</emphasis>er <emphasis>I</emphasis>nch. This term refers -to the number of dots that your printer will print in a space of one -inch (approximately 2.54 cm). This is highly dependent upon the -capability of your printer. Resolutions below 300 DPI are -used for draft quality. For general purpose printing, select -300 - 360 DPI. Higher quality printing can be achieved by -selecting 600 - 720 DPI. Settings higher than this are used for the -highest possible quality for printing photographs and other high -quality graphics. Experiment with your printer and these settings -with different types of graphics and photographs to see what -results you can obtain with your printer. High resolutions (large -numbers of dots per inch) require substantial image processing time, -and the print files can be very large; it's not uncommon for a full -page, 1440x720 DPI image to require 100 MB of temporary storage! - </para> - </sect4> - <sect4><title>Draft or Fast Economy Draft</title> - <para> - When this text appears next to the resolution, it refers to the -fact that the quality will be relatively low, but suitable for rough -drafts. Draft quality is higher than fast economy draft. These -options will give you the fastest printing speed. Economy Draft uses -less ink, and as a result the image will be pale. These modes are -generally not very useful for printing photographs. - </para> - </sect4> - - <sect4><title>Unidirectional</title> - <para> - When printing an image, you have probably noticed the print -head inside the printer moving back and forth across the print media. -Many printers are capable of putting ink on the page regardless of -which direction the print head is moving. However, quality can -sometimes be improved by only putting ink on the page when the printer -head is moving in one direction. The -<guimenuitem>Unidirectional</guimenuitem> setting instructs the -software to only place ink on the page when the print head is moving -one way. When the print head returns, it will not place ink on the -page. On many printers, the print quality is better, at the expense -of printing speed. - </para> - </sect4> - <sect4><title>High(est) Quality</title> - <para> - With lower quality print modes, one may see an effect where -the printed image looks like it has rows of stripes with a small -separation between the stripes. This effect is called "banding" and -is undesirable. In the <emphasis>high</emphasis> and -<emphasis>highest</emphasis> quality modes, the printer will make more -passes over the same part of the page in order to improve quality and -(reduce or) eliminate banding. This requires more temporary disk -space and prints more slowly, but does not require significantly more -processing time. - </para> - </sect4> - <sect4><title>DMT</title> - <para> - DMT is an acronym which stands for <emphasis>D</emphasis>ot - <emphasis>M</emphasis>odulation - <emphasis>T</emphasis>echnology. - This term refers to a print mode used by certain Canon printers - to improve the quality of the printed output. Unfortunately, - at this time, all of the available DMT modes do not work - correctly. The cases which do work correctly will offer - significantly improved printing quality. - </para> - </sect4> - </sect3> - </sect2> - - <sect2><title id="sec-preview">Preview</title> - <para> - Notice in the upper left of the window is a preview of your image. -This preview is a representation of where your picture will print on -the selected media, and approximately what it will look like. This -preview will be updated as you modify selections in the -<guilabel>Position</guilabel>, <guilabel>Size</guilabel>, -<guilabel>Media Size</guilabel>, and <guilabel>Output Type</guilabel> -portions of the window. You may also select the image with your mouse -and move it manually if you wish. In doing so, you will note that the -<guilabel>Position</guilabel> settings are updated accordingly. Take -note of the arrow, which points toward the top of the media, where top -is the first part of the media to enter the printer. - </para> - <para> - The preview may be moved around the page as follows: - </para> - <itemizedlist> - <listitem><para> Clicking and dragging the <emphasis>left</emphasis> - (primary) mouse button moves the image around the page as you would - expect; the image moves with the mouse. </para></listitem> - <listitem><para> Clicking and dragging the - <emphasis>middle</emphasis> mouse button moves the image around the - page in a finer fashion, such that each pixel of mouse movement - moves the image by one point (1/72 inch). This allows very fine - placement of the image on the page. </para></listitem> - <listitem><para> Clicking and dragging the - <emphasis>right</emphasis> (secondary) mouse button moves the image - around the page much the same as with the left button, but the image - will only move in units of the image size. Thus, if the image is - one inch wide and two inches tall, the image will not move at all - until you have moved the mouse far enough so that the image would be - moved one inch vertically and two inches horizontally. This is - handy if you wish to print multiple images of the same size on one - piece of paper.</para></listitem> - <listitem><para> If you hold down the <emphasis>shift</emphasis> key - on the keyboard when you click and drag the mouse, the image will - only move in the horizontal or vertical direction (depending upon - which way you first move the mouse). This allows you to constrain - motion to the horizontal or vertical. </para></listitem> - <listitem><para> If you click another button while dragging the - mouse, the image will immediately return to the position it was in - before you clicked the mouse the first time. This allows you to - not move the image if you have started moving it and have decided - that you don't want to move it. The preview will not respond to the - mouse until you release all of the mouse buttons and click and drag - afresh. </para></listitem> - </itemizedlist> - </sect2> - - <sect2><title id="sec-position">Position</title> - - <sect3><title>Orientation</title> - <para> - The Orientation menu allows the user to choose the orientation -of the paper. The menu selections are -<guimenuitem>Auto</guimenuitem>, <guimenuitem>Portrait</guimenuitem>, -<guimenuitem>Landscape</guimenuitem>, <guimenuitem>Upside -down</guimenuitem>, and <guimenuitem>Seascape</guimenuitem>. Click on -the rectangular tab to see these choices -and make your selection. When you have done so, the pulldown menu -will have disappeared, and your choice will appear. Also, note that -the preview image will have changed accordingly. - </para> - <para> - When set to <guimenuitem>Auto</guimenuitem>, the software will make an -intelligent choice of orientation based on the dimensions of the image -to be printed. <guimenuitem>Portrait</guimenuitem> orients the print media -with the longest edge going from top to bottom, while -<guimenuitem>Landscape</guimenuitem> orients the paper with the longest edge -going from side to side. <guimenuitem>Upside down</guimenuitem> and -<guimenuitem>Seascape</guimenuitem> orient the paper the same as -<guimenuitem>Portrait</guimenuitem> and <guimenuitem>Landscape</guimenuitem> -respectively, with the difference being that the image is rotated 180 degrees. - </para> - </sect3> - - <sect3><title>Automatic Centering</title> - <para> - There are three buttons that deal with centering an image. The -leftmost button is the <guibutton>Vertically</guibutton> button, the -middle button is the <guibutton>Both</guibutton> button, and -the rightmost button is the <guibutton>Horizontally</guibutton> -button. Use the <guibutton>Both</guibutton> button to center your -image both horizontally and vertically. This will cause the top and -bottom borders to be equal, and the left and right borders to be -equal. If you have placed your image manually by using the mouse -button, then you may center the image in the horizontal direction only -by clicking on the <guibutton>Horizontally</guibutton> button. -Likewise, to adjust the image only in the vertical direction, click on -the <guibutton>Vertically</guibutton> button. Note that in -each case, the image is centered with regard to the edges of the -media, and without regard to the printable portion of the media. Many -printers are incapable of printing to each edge of the media. Some -media may have edges which detach. Consult your printer documentation -for more details regarding your printer's capabilities in this regard. - </para> - </sect3> - - <sect3><title>Manual Settings</title> - <para> - You will notice that there are six boxes that contain numbers -just below the Orientation menu and just above the GUI buttons related -to centering an image. When you move the preview image manually with -the mouse, or when you click on one of the centering buttons, the -preview image moves and these six boxes get updated. - </para> - <sect4><title>Left</title> - <para> - The number appearing in the <guimenuitem>Left</guimenuitem> box denotes -the number of units (cm or inches) that the left side of the image -will be printed away from the left edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - <sect4><title>Right</title> - <para> - The number appearing in the <guimenuitem>Right</guimenuitem> box denotes -the number of units (cm or inches) that the right side of the image -will be printed away from the left edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - <sect4><title>Right Border</title> - <para> - The number appearing in the <guimenuitem>Right Border</guimenuitem> box denotes -the number of units (cm or inches) that the right side of the image -will be printed away from the right edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - <sect4><title>Top</title> - <para> - The number appearing in the <guimenuitem>Top</guimenuitem> box denotes -the number of units (cm or inches) that the top side of the image -will be printed away from the top edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - <sect4><title>Bottom</title> - <para> - The number appearing in the <guimenuitem>Bottom</guimenuitem> box denotes -the number of units (cm or inches) that the bottom side of the image -will be printed away from the top edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - - <sect4><title>Bottom Border</title> - <para> - The number appearing in the <guimenuitem>Bottom Border</guimenuitem> box denotes -the number of units (cm or inches) that the bottom side of the image -will be printed away from the bottom edge of the media. You may select -the units by clicking the <guibutton>Inch</guibutton> or -<guibutton>cm</guibutton> buttons in the <guilabel>Units</guilabel> section just below -these GUI boxes. - </para> - </sect4> - - </sect3> - - </sect2> - - <sect2><title id="sec-scaling">Size</title> - - <sect3><title>Slider Bar and Spin Box</title> - <para> - The slider bar can be moved as desired by the user. Notice -that while sliding this bar, the preview image changes accordingly. -One will also note that several boxes in the Gimp-Print GUI change values when this bar is moved. -These boxes are the six position boxes (left, right, right border, -top, bottom, bottom border), the two size boxes (width and height), -and the spin box to the right of the slider bar. - </para> - <para> - This slider bar is used to scale the image to a desirable size, but the same effect can -be obtained by either clicking an arrow on the spin box to the right of this -slider bar, or by manually typing a number into this spin box. Notice -that by setting the spin box in this way, the slider bar is also -moved. All of the described methods will cause the image to be -scaled accordingly. - </para> - </sect3> - - <sect3><title>Scale by Percent or PPI</title> - <para> - One may choose to scale the image by a percentage, or by PPI, -which means "<emphasis>p</emphasis>ixels <emphasis>p</emphasis>er -<emphasis>i</emphasis>nch". Click the radio button -next to the word to set the desired scaling factor. - </para> - <para> - When scaling by a percentage, the number reflected in the spin -box next to the slider bar represents the percentage relative -to the full size of the selected print medium. For example, with this spin box -set to 50, the image will be scaled to 50% of the size of the print -medium. When set to 100, the image will attempt to fill the print -medium, within the constraints of maintaining the proper aspect ratio -and the margins of the selected print medium. This effect can be seen -in the preview window. - </para> - <para> - When scaling by PPI, the number reflected in the spin box next to -the slider bar represents the number of pixels that will be -printed per inch. For example, if the user is printing a 640x480 -image at a size of 6.4x4.8 inches (as measured by the size boxes), the -image will be printed at 100 DPI. - </para> - </sect3> - - <sect3><title>Use Original Image Size</title> - <para> - By clicking this button, the image will be scaled to as close -to the native size of the image as possible. This effect can -immediately be seen in the preview image. - </para> - <para> - The native image size may be found or set in the GIMP by - selecting <guimenuitem>Image/Scale Image</guimenuitem> in the - GIMP. Under the <guilabel>Print Size and Display Unit</guilabel> - group in the <guilabel>Scale Image</guilabel> dialog, you can - determine (or change) the width and height of the image, or - choose the resolution. - </para> - </sect3> - - <sect3><title>Width and Height</title> - <para> - These boxes show the size of the printed image in either inches -or centimeters (depending on which unit is selected). The user may -choose to manually modify these values. When one value is modified, -the other value is automatically modified in order to maintain the -aspect ratio (the ratio of width to height). This effect can be -immediately seen in the preview image. - </para> - </sect3> - - <sect3><title>Units</title> - <para> - The units can be set to inches or centimeters by clicking the appropriate -radio button next to the desired unit. This setting effects the -values printed in the six position boxes (left, right, right border, -top, bottom, bottom border) and the two size boxes (width and height). - </para> - </sect3> - - </sect2> - - <sect2><title id="sec-image-settings">Image/Output Settings</title> - <para> - By clicking on the tab labeled <guilabel>Image/Output -Settings</guilabel>, the Gimp-Print window will appear as shown in -<xref linkend="fig-gimp-print-gui-1">. Notice that there are -two sections to this portion of the window, namely, -<guilabel>Image Type</guilabel> and -<guilabel>Output Type</guilabel>. - - </para> - - <sect3><title>Image Type</title> - - <sect4><title>Line Art</title> - <para> - This setting tells the printer driver to generate color -quickly. The color is bold and bright, but color accuracy is not very -good. There may also be some unexpectedly sharp transitions in -colors. This mode is acceptable for printing text with small amounts -of color, and may be acceptable for presentation graphics. - </para> - </sect4> - - <sect4><title>Solid Colors</title> - <para> - This mode produces color which is considerably more accurate -than the <guilabel>Line Art</guilabel> mode, but with a reduction in performance. In -general, hues will be accurate but tonalities may not be accurate. -There should be no sharp transitions in colors. This mode is good for -printing presentation graphics in most cases. - </para> - </sect4> - - <sect4><title>Photograph</title> - <para> - This mode produces the most accurate colors and tonalities at a -greater cost in performance. This is the mode to use when printing -high quality photographs or other high quality images. - </para> - </sect4> - - </sect3> - - <sect3><title>Output Type</title> - <para> - The user is given the choice of color, black and white, and -grayscale. Color is selected when the desired output is to be in -color. Greyscale will result in the printed image having various -shades of grey. Black and white is just that. The effect of this -setting can be seen in the preview window. - </para> - </sect3> - - <sect3><title>Adjust Output</title> - <para> - Clicking on this button causes the <guilabel>Print Color Adjust</guilabel> window to -appear (see <xref linkend="fig-gimp-print-color-adjust">). In -this window, one will see a representation of the image to be printed -as well as several slider bars. These slider bars collectively adjust -many different aspects of the image. The values can also be adjusted -by clicking the arrows or by typing a value into the appropriate spin -box on the right side of each slider bar. - </para> - - <figure id="fig-gimp-print-color-adjust"><title>The Print Color Adjust Window</title> - <mediaobject> - <imageobject> - <imagedata scale="50" fileref="figures/gimp-print-print-color-adjust.png" FORMAT="PNG"> - </imageobject> - <textobject> - <phrase>>The Print Color Adjust Window</phrase> - </textobject> - </mediaobject> - </figure> - - <sect4><title>Brightness</title> - <para> - Adjust the brightness of the image. A setting of 0.0 gives a fully black -image, while a 2.0 setting gives a fully white image. Values greater than 1.0 will result in - black not being solid and highlights turning white; values less than - 1.0 will result in white not being perfectly clear and shadows turning - black. - </para> - </sect4> - - <sect4><title>Contrast</title> - <para> - Adjust the contrast of the image. A setting of 0.0 gives a solid gray for the -entire image, the exact gray depending upon the brightness chosen. - </para> - </sect4> - - <sect4><title>Cyan, Magenta, Yellow</title> - <para> -These three options allow specification of the cyan, magenta, and -yellow levels independently, for rebalancing the levels. Normally, -these should be adjusted to yield neutral gray, but they can be used -for other effects. - </para> - </sect4> - - <sect4><title>Saturation</title> - <para> -Adjust the brilliance of colors. A setting of 0.0 results in pure grayscale. -A saturation setting of less than 1.0 results in more muted colors. A -saturation setting of greater than 1.0 results in more vibrant colors. Very high -saturation often results in very strange effects, including -posterization and banding that might not be expected. For normal -purposes, the saturation should generally be set to a value less than 1.5. - </para> - </sect4> - - <sect4><title>Density</title> - <para> -Adjust the amount of ink deposited on the paper. If you have chosen the -correct paper type and are getting ink bleeding through the paper -or puddling, try reducing the density to the lowest value you -can while still achieving solid black. If black is not solid -black, even with the contrast and brightness at 1.0, try increasing -the density. Note that changes to this setting will not be visible in -the image preview. - </para> - <para> -All of the supported printers actually need less than 100% ink -density in most cases, so the actual density is something other than -the nominal density setting. The effective density setting cannot go -above 100%, so if a value specified will result in an excessively high -density level, it will be silently limited to a setting of 1.0. - </para> - </sect4> - - <sect4><title>Gamma</title> - <para> -Adjust the gamma of the image, over and above the printer-specific -correction. Gamma less than 1.0 will result in a darker image; gamma -greater than 1.0 will result in a lighter image. Unlike brightness, -gamma adjustment does not change the endpoints; it merely changes the -shape of the input->output curve. - </para> - </sect4> - - <sect4><title>Dither Algorithm</title> - <para> -The recommended dither algorithm is <guimenuitem>Adaptive -Hybrid</guimenuitem> (which is the default) for text or other fine -black detail, or if this is mixed with continuous tone images. The -<guimenuitem>Ordered</guimenuitem> dithering algorithm is just as good -(and somewhat faster) for pure continuous-tone images and photographs, -but may yield poor results with text or other fine detail, -particularly at high printing resolutions. - </para> - <para> The <guimenuitem>Fast</guimenuitem> algorithm gives the -fastest results at the expense of color accuracy. It is a simplified -ordered dither. On simple four color printers (or other printers used -in four color mode), the quality is similar to -<guimenuitem>Ordered</guimenuitem>, although dark gray rendition is -not as good due to a simpler transfer between black and colored ink. -With six-color printers, color rendition is somewhat worse, but it -should be quite usable in cases where optimum quality is not critical. -In black and white, it is an efficient way to render grayscale, but it -may not give best results when used with variable dot size printers -(modern Epson printers, or Canon printers using DMT). On rare three -color printers (CMY only) the results should be identical to ordered -dither. - </para> - <para> <guimenuitem>Very Fast</guimenuitem> is even faster than -<guimenuitem>Fast</guimenuitem>, with even more loss of quality. -Color and grayscale output will show strong patterning that resembles -screening, although it isn't. On laser printers, and possibly on -certain kinds of text and line art, <guimenuitem>Very -Fast</guimenuitem> dithering may actually yield the best quality. - </para> - <para> -Error diffusion algorithms (<guimenuitem>Hybrid -Floyd-Steinberg</guimenuitem> is such an algorithm) perform very well -at high densities, and are capable of -rendering very fine detail rather well, but they tend to exhibit artifacts in -the form of "waves" or "worms" of dots which results in noticeable -texturing in pale areas. Furthermore, pale areas immediately adjacent -to white take a while to "build up" sufficient error to print at all. -This is sometimes called "tearing" or "waterfalling". - </para> - - </sect4> - - <sect4><title>Set Defaults and Close</title> - <para> - When the <guibutton>Set Defaults</guibutton> button is clicked, -the slider bar settings will return to their default values. The -dither algorithm setting is uneffected. The <guilabel>Print Color -Adjust</guilabel> window will close when the -<guibutton>Close</guibutton> button is clicked. - </para> - </sect4> - - </sect3> - - </sect2> - - <sect2><title id="sec-printing-and-saving-settings">Printing and Saving Settings</title> - <para> - At the bottom of the Gimp-Print window, there are five buttons labeled -<guibutton>About</guibutton>, -<guibutton>Print and Save Settings</guibutton>, -<guibutton>Save Settings</guibutton>, -<guibutton>Print</guibutton>, -and <guibutton>Cancel</guibutton>. The <guibutton>About</guibutton> -button will show information about the Gutenprint software, such as -the version number, authors names, project web site, and software -licensing. After clicking on the <guibutton>About</guibutton>, read -the information, and then close the window by pressing the -<guibutton>OK</guibutton> button. - </para> - <para> - The <guibutton>Print and Save Settings</guibutton> button will -save the current settings and then print the desired image. Recall -that these settings are saved in <filename>~/.gimp-1.2/printrc</filename>. The -<guibutton>Save Settings</guibutton> button will only save the -settings. The <guibutton>Print</guibutton> button will print the -image only. The <guibutton>Cancel</guibutton> will close the -Gimp-Print GUI window. - </para> - </sect2> - - </sect1> - - </chapter> |