color/starter_color
Demonstrate all supported color spaces.
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/*
* Starter color:
* Demonstrate basic use of supported color spaces
*
* Apply the following color spaces to text and vector graphics:
* - Gray
* - RGB
* - CMYK
* - ICC-based gray/rgb/cmyk
* - spot(separation)
* - Lab
* - DeviceN
* - pattern
* - shadings
*
* Required software: PDFlib/PDFlib+PDI/PPS 9.1
* Required data: none
*/
package com.pdflib.cookbook.pdflib.color;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
public class starter_color {
public static void main(String argv[]) {
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "starter_color.pdf";
pdflib p = null;
int font, devicen, sh, shp, pattern;
int y = 800, x = 50, xoffset1 = 80, xoffset2 = 100, yoffset = 70, r = 30;
double w, h;
int icchandle;
String optlist;
String textbuf;
try {
p = new pdflib();
/* This means that errors in function calls trigger an exception. */
p.set_option("errorpolicy=exception SearchPath={{" + searchpath + "}}");
/* For this important function we prefer an error return value */
if (p.begin_document(outfile, "errorpolicy=return") == -1)
throw new Exception("Error: " + p.get_errmsg());
p.set_info("Creator", "PDFlib starter sample");
p.set_info("Title", "starter_color");
/* Load the font */
font = p.load_font("NotoSerif-Regular", "unicode", "");
/* Start the page */
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
p.setfont(font, 14);
/*
* -----------------------------------------------------------------
* Use default colors
*
* If no special color is set the default values will be used. The
* default values are restored at the beginning of the page. 0=black
* in the Gray color space is the default fill and stroke color in
* many cases, as shown in our sample.
* -----------------------------------------------------------------
*/
/* Fill a circle with the default black fill color */
p.circle(x, y -= yoffset, r);
p.fill();
/* Output text with default black fill color */
p.fit_textline(
"Circle and text with default color {gray 0}", x
+ xoffset2, y, "");
p.fit_textline("1.", x + xoffset1, y, "");
/*
* -----------------------------------------------------------------
* Use the Gray color space
*
* Gray color is defined by gray values between 0=black and 1=white.
* -----------------------------------------------------------------
*/
/*
* Set the current fill color to light gray 0.5 = 50% gray.
*/
optlist = "fillcolor={gray 0.5}";
p.set_graphics_option(optlist);
/* Fill a circle with the gray color defined above */
p.circle(x, y -= yoffset, r);
p.fill();
/* Output text with the gray color defined above */
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("2.", x + xoffset1, y, optlist);
/*
* -----------------------------------------------------------------
* Use the RGB color space
*
* RGB color is defined by RGB triples, i.e. three values between 0
* and 1 specifying the percentage of red, green, and blue. (0, 0,
* 0) is black and (1, 1, 1) is white. The commonly used RGB color
* values in the range 0-255 must be divided by 255 in order to
* scale them to the range 0-1 as required by PDFlib and PDF.
* -----------------------------------------------------------------
*/
/* Set the fill color to a green tint with RGB values (0.2, 0.8, 0.2).
* Alternatively you can use HTML color names, e.g. "fillcolor=limegreen"
*/
optlist = "fillcolor={rgb 0.2 0.8 0.2}";
p.set_graphics_option(optlist);
/* Draw a circle with the current fill color defined above */
p.circle(x, y -= yoffset, r);
p.fill();
/* Output a text line with the RGB fill color defined above */
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("3.", x + xoffset1, y, optlist);
/*
* -----------------------------------------------------------------
* Use the CMYK color space
*
* CMYK color is defined by four CMYK values between 0 = no color
* and 1 = full color representing cyan, magenta, yellow, and black
* values; (0, 0, 0, 0) is white and (0, 0, 0, 1) is black.
* -----------------------------------------------------------------
*/
/* Set the current fill color to a pale orange represented by
* (0.1, 0.7, 0.7, 0.1) which defines 10% cyan, 70% magenta, 70% yellow,
* and 10% black.
*/
optlist = "fillcolor={cmyk 0.1 0.7 0.7 0.1}";
p.set_graphics_option(optlist);
/* Fill a circle with the current fill color defined above */
p.circle(x, y -= yoffset, r);
p.fill();
/* Output a text line with the CMYK fill color defined above */
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("4.", x + xoffset1, y, optlist);
/*
* -----------------------------------------------------------------
* Use the Lab color
*
* Device-independent color in the CIE L*a*b* color space is
* specified by a luminance value in the range 0-100 and two color
* values in the range -127 to 128. The a value contains the
* green-red axis, while the b value contains the blue-yellow
* axis.
* -----------------------------------------------------------------
*
*/
/* Set the current fill color to a loud blue represented by
* (100, -127, -127).
*/
optlist = "fillcolor={lab 100 -127 -127}";
p.set_graphics_option(optlist);
/* Fill a circle with the Lab fill color defined above */
p.circle(x, y -= yoffset, r);
p.fill();
/* Output a text line with the Lab fill color defined above */
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("5.", x + xoffset1, y, optlist);
/*
* ---------------------------------------------------------------
* Use ICC based color space
*
* ICC-based colors are specified with the help of an ICC profile.
* ---------------------------------------------------------------
*/
/* Set the color based on the sRGB ICC profile to a grass-green
* represented by the RGB color values (0.1 0.95 0.3) which
* define 10% red, 95% green, and 30% blue.
*
* For the sRGB profile only, the following alternative without
* any ICC profile handle could be used:
* sprintf(optlist, "fillcolor={iccbased srgb 0.1 0.95 0.3}");
*/
/* Load the sRGB profile. sRGB is guaranteed to be always available. */
icchandle = p.load_iccprofile("sRGB", "usage=iccbased");
if (icchandle == -1){
System.err.println("Error: " + p.get_errmsg() );
System.err.println("See www.pdflib.com for output intent ICC profiles.");
p.delete();
System.exit(2);
}
/*
* You can use similar syntax for CMYK and grayscale profiles with
* the corresponding number of four or one color values.
*/
optlist = "fillcolor={iccbased " + icchandle + " 0.1 0.95 0.3}";
p.set_graphics_option(optlist);
/* Fill a circle with the ICC based RGB fill color defined above */
p.circle(x, y-=yoffset, r);
p.fill();
/* Output a text line with the ICC based RGB fill color defined above.
*/
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("6.", x + xoffset1, y, optlist);
/* --------------------------------------------------------------------
* Use spot (separation) color
*
* Spot color (separation color space) is a builtin or user-defined
* named color with an alternate representation in one of the
* other color spaces above; this is generally used for preparing
* documents which are intended to be printed on an offset printing
* machine with one or more custom colors. The tint value (percentage)
* ranges from 0=no color to 1=maximum intensity of the spot color.
* --------------------------------------------------------------------
*/
/* Set spot color "PANTONE 281 U" with a tint value of 1 (=100%)
* Alternatively the following handle-based approach can be used:
*
* spot = p.makespotcolor("PANTONE 281 U", 0);
* sprintf(optlist, "fillcolor={spot %d 1}", spot);
*
* See PDFlib Tutorial for defining custom spot colors.
*/
optlist = "fillcolor={spotname {PANTONE 281 U} 1}";
p.set_graphics_option(optlist);
/* Fill a circle with the ICC based RGB fill color defined above */
p.circle(x, y -= yoffset, r);
p.fill();
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x + xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("7.", x + xoffset1, y, optlist);
/* --------------------------------------------------------------------
* Use DeviceN color
*
* DeviceN color spaces can use an arbitrary number of color
* components. If these colorants are not available on the output
* device, the colors are converted to an alternate color space
* via a user-supplied transform function. The tint value ranges
* from 0=no color to 1=maximum intensity.
* --------------------------------------------------------------------
*/
/* Set DeviceN color with colorants Magenta and Yellow with
* alternate color space CMYK. The PostScript transform function
* simply adds two 0 values for the Cyan and Black channels.
*/
devicen = p.create_devicen("names={Magenta Yellow} alternate=devicecmyk transform={{0 0 4 1 roll}}");
optlist = "fillcolor={devicen " + devicen + " 0.5 1}";
p.set_graphics_option(optlist);
/* Fill a circle with the DeviceN fill color defined above */
p.circle(x, y-=yoffset, r);
p.fill();
textbuf = "Circle and text with " +optlist;
p.fit_textline(textbuf, x+xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("8.", x+xoffset1, y, optlist);
/* --------------------------------------------------------------------
* Use Shading colorspace to draw a color gradient
* --------------------------------------------------------------------
*/
/* Create axial shading from red to blue */
sh = p.shading("axial", 10, 10, 400, 300, 0, 0, 0, 0,
"startcolor=red endcolor=blue");
shp = p.shading_pattern(sh, "");
optlist = "fillcolor={pattern " + shp + "}";
p.set_graphics_option(optlist);
/* Fill a circle with the shading defined above */
p.circle(x, y-=yoffset, r);
p.fill();
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x+xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("9.", x+xoffset1, y, optlist);
/* --------------------------------------------------------------------
* Use Pattern colorspace to fill objects with a geometric pattern
* --------------------------------------------------------------------
*/
w = 5;
h = 10;
/* Create a pattern containing geometric objects */
pattern = p.begin_pattern_ext(w, h, "");
/* Use RGB color for the pattern */
p.setcolor("stroke", "rgb", 0.4, 0.5, 0.2, 0);
p.setlinewidth(w / 10);
/* Set the line cap beyond the line end */
p.set_graphics_option("linecap=2");
/* Draw the pattern objects */
p.moveto(0, 0);
p.lineto(w, h / 2);
p.lineto(0, h);
p.stroke();
p.moveto(0, h / 2);
p.lineto(w / 2, h / 4);
p.stroke();
p.moveto(w, h);
p.lineto(w / 2, 3 * h / 4);
p.stroke();
p.end_pattern();
/* Now use the pattern colorspace */
optlist ="fillcolor={pattern " + pattern + "}";
p.set_graphics_option(optlist);
/* Fill a circle with the pattern color defined above */
p.circle(x, y-=yoffset, r);
p.fill();
/* Set text rendering to "fill and stroke text" to ensure that
* patterned text remains readable.
*/
p.set_text_option("textrendering=2");
textbuf = "Circle and text with " + optlist;
p.fit_textline(textbuf, x+xoffset2, y, "");
/* Alternatively you can set the fill color directly in the call to
* fit_textline(). This sets the color just for a single function call.
*/
p.fit_textline("10.", x+xoffset1, y, optlist);
p.end_page_ext("");
p.end_document("");
}
catch (PDFlibException e) {
System.err.println("PDFlib exception occurred:");
System.err.println("[" + e.get_errnum() + "] " + e.get_apiname()
+ ": " + e.get_errmsg());
}
catch (Exception e) {
System.err.println(e);
}
finally {
if (p != null) {
p.delete();
}
}
}
}