images/display_image_partially
Display an image partially. Use the "matchbox" option with the "clipping" suboption to define a rectangular part of the image. Output the image part in its original size. Output the image part by fitting it in a box of a given size.
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* Display image partially:
* Display an image partially.
*
* Use the "matchbox" option with the "clipping" suboption to define a
* rectangular part of the image.
* Output the image part in its original size.
* Output the image part by fitting it in a box of a given size.
*
* Required software: PDFlib Lite/PDFlib/PDFlib+PDI/PPS 7
* Required data: image file
*/
package com.pdflib.cookbook.pdflib.images;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
public class display_image_partially
{
public static void main (String argv[])
{
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "display_image_partially.pdf";
String title = "Display Image Partially";
pdflib p = null;
String imagefile = "nesrin.jpg";
int image, gstate, font;
String optlist, text;
int llx = 50, lly = 550;
try {
p = new pdflib();
p.set_parameter("SearchPath", searchpath);
/* This means we must check return values of load_font() etc. */
p.set_parameter("errorpolicy", "return");
if (p.begin_document(outfile, "") == -1)
throw new Exception("Error: " + p.get_errmsg());
p.set_info("Creator", "PDFlib Cookbook");
p.set_info("Title", title + " $Revision: 1.3 $");
/* Load the image */
image = p.load_image("auto", imagefile, "");
if (image == -1)
throw new Exception("Error: " + p.get_errmsg());
/* For PDFlib Lite: change "unicode" to "winansi" */
font = p.load_font("Helvetica", "unicode", "");
if (font == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Start page 1 */
p.begin_page_ext(0, 0, "width=a4.height height=a4.width");
p.setfont(font, 12);
/* -------------------------------------------------------------
* Output the complete image in its original size with a certain
* transparency as a kind of background image
* -------------------------------------------------------------
*/
/* Output some descriptive text */
text = "Page 1:";
p.fit_textline(text, llx, lly, "");
text = "Place the full image in its original size, with a " +
"transparency of 50%";
p.fit_textline(text, llx, lly-=30, "");
/* Save the current graphics state */
p.save();
/* Create an extended graphics state with a transparency set to 50% */
gstate = p.create_gstate("opacityfill=.4");
/* Apply the extended graphics state */
p.set_gstate(gstate);
/* Fit the image in its original size with the transparency set above */
p.fit_image(image, llx, lly-=500, "");
/* Restore the original graphics state */
p.restore();
/* ----------------------------------------------
* Place a part of the image in its original size
* ----------------------------------------------
*/
/* Define a rectangular part of the image by using the "matchbox" option
* with the "clipping" suboption to set the lower left and upper right
* corners of the rectangle.
*/
int c_llx = 350, c_lly = 180, c_urx = 550, c_ury = 360;
optlist = "matchbox={clipping={" +
c_llx + " " + c_lly + " " + c_urx + " " + c_ury + "}}";
/* Output some descriptive text */
text = "Place a part of the image in its original size at the";
p.fit_textline(text, llx + c_llx, 410, "");
text = "position as it would appear in the full image";
p.fit_textline(text, llx + c_llx, 395, "");
/* Display the image partially at the same position as it would appear
* when displaying the complete image above.
*/
p.fit_image(image, llx + c_llx, lly + c_lly, optlist);
/* Output some descriptive text */
text = "Place a part of the image in its original size";
p.fit_textline(text, llx, 230, "");
text = "at the lower left corner of the full image";
p.fit_textline(text, llx, 215, "");
/* Now, display the part of the image at the lower left corner of the
* complete image above.
*/
p.fit_image(image, llx, lly, optlist);
p.end_page_ext("");
/* Start Page 2 */
p.begin_page_ext(0, 0, "width=a4.height height=a4.width");
p.setfont(font, 12);
/* ----------------------------------------------------
* Display the image partially in a box of a given size
* ----------------------------------------------------
*/
lly = 550;
/* Output some descriptive text */
p.fit_textline("Page 2:", llx, lly, "");
text = "Output a part of the image in its original size:";
p.fit_textline(text, llx, lly-=30, "");
text = "p.fit_image(image, x, y, \"matchbox={clipping={35% 35% 75% " +
"75%}}\");";
p.fit_textline(text, llx, lly-=15, "");
/* Define a rectangular part of the image by using the "matchbox" option
* with the "clipping" suboption. The lower left and upper right corners
* of the rectangle are set as percentages of the original image size.
*/
optlist = "matchbox={clipping={35% 35% 75% 75%}}";
/* Place the part of the image defined */
p.fit_image(image, llx, lly-=220, optlist);
/* Output some descriptive text */
text = "Place a part of the image in a given box:";
p.fit_textline(text, llx, lly-=50, "");
text = "p.fit_image(image, x, y, \"matchbox={clipping={35% 35% 75% " +
"75%}} boxsize={300 200} fitmethod=meet showborder\");";
p.fit_textline(text, llx, lly-=15, "");
/* Display the image partially in a box of the given size. Scale the
* part of the image proportionally until it fits completely into the
* box.
*/
optlist = "matchbox={clipping={35% 35% 75% 75%}} " +
"boxsize={200 100} fitmethod=meet showborder";
p.fit_image(image, llx, lly-=120, optlist);
p.end_page_ext("");
p.close_image(image);
p.end_document("");
} catch (PDFlibException e) {
System.err.print("PDFlib exception occurred:\n");
System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +
": " + e.get_errmsg() + "\n");
} catch (Exception e) {
System.err.println(e.getMessage());
} finally {
if (p != null) {
p.delete();
}
}
}
}