Картинки не близки к тому, что я буду использовать в своем приложении, но служат доказательством концепции.
пакет javaapplication3;
импортировать java.awt.*; импортировать java.awt.font.FontRenderContext; импортировать java.awt.font.LineBreakMeasurer; импортировать java.awt.font.TextAttribute; импортировать java.awt.font.TextLayout; импортировать java.awt.image.BufferedImage; импортировать java.io.File; импортировать java.io.IOException; импортировать java.net.MalformedURLException; импортировать java.net.URL; импортировать java.text.AttributedCharacterIterator; импортировать java.text.AttributedString; импортировать java.util.ArrayList; импортировать java.util.HashMap; импортировать java.util.logging.Level; импортировать java.util.logging.Logger; импортировать javax.imageio.ImageIO;
/** * * @author Хавьер А. Ортис Бултрон */ public class DefaultImageManager {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
try {
// TODO code application logic here
DefaultImageManager manager = new DefaultImageManager();
URL url = DefaultImageManager.class.getResource("weather-rain.png");
manager.getLayers().add(ImageIO.read(url));
url = DefaultImageManager.class.getResource("weather-sun.png");
manager.getLayers().add(ImageIO.read(url));
manager.addText(new Font("Arial", Font.PLAIN, 10), "Many people believe that Vincent van Gogh painted his best works "
+ "during the two-year period he spent in Provence. Here is where he "
+ "painted The Starry Night--which some consider to be his greatest "
+ "work of all. However, as his artistic brilliance reached new "
+ "heights in Provence, his physical and mental health plummeted. ",
200, 150, new Point(0, 0));
manager.generate();
} catch (MalformedURLException ex) {
Logger.getLogger(DefaultImageManager.class.getName()).log(Level.SEVERE,
ноль, экс); } catch (IOException ex) { Logger.getLogger(DefaultImageManager.class.getName()).log(Level.SEVERE, null, ex); } } /** * Слои, используемые для создания конечного изображения */ private ArrayListlayers = new ArrayList(); частный ArrayList textLayers = новый ArrayList();
/**
* @return the layers
*/
public ArrayList<BufferedImage> getLayers() {
return layers;
}
private Dimension getMaxSize() {
int width = 0, height = 0;
for (BufferedImage img : getLayers()) {
if (img.getWidth() > width) {
width = img.getWidth();
}
if (img.getHeight() > height) {
height = img.getHeight();
}
}
return new Dimension(width, height);
}
public void addText(Font font, String text, int height, int width, Point location) {
BufferedImage textImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
HashMap<TextAttribute, Object> map =
new HashMap<TextAttribute, Object>();
map.put(TextAttribute.FAMILY, font.getFamily());
map.put(TextAttribute.SIZE, font.getSize());
map.put(TextAttribute.FOREGROUND, Color.BLACK);
AttributedString aString = new AttributedString(text, map);
AttributedCharacterIterator paragraph = aString.getIterator();
// index of the first character in the paragraph.
int paragraphStart = paragraph.getBeginIndex();
// index of the first character after the end of the paragraph.
int paragraphEnd = paragraph.getEndIndex();
Graphics2D graphics = textImage.createGraphics();
FontRenderContext frc = graphics.getFontRenderContext();
// The LineBreakMeasurer used to line-break the paragraph.
LineBreakMeasurer lineMeasurer = new LineBreakMeasurer(paragraph, frc);
// Set break width to width of Component.
float breakWidth = width;
float drawPosY = 0;
// Set position to the index of the first character in the paragraph.
lineMeasurer.setPosition(paragraphStart);
// Get lines until the entire paragraph has been displayed.
while (lineMeasurer.getPosition() < paragraphEnd) {
// Retrieve next layout. A cleverer program would also cache
// these layouts until the component is re-sized.
TextLayout layout = lineMeasurer.nextLayout(breakWidth);
// Compute pen x position. If the paragraph is right-to-left we
// will align the TextLayouts to the right edge of the panel.
// Note: this won't occur for the English text in this sample.
// Note: drawPosX is always where the LEFT of the text is placed.
float drawPosX = layout.isLeftToRight()
? 0 : breakWidth - layout.getAdvance();
// Move y-coordinate by the ascent of the layout.
drawPosY += layout.getAscent();
// Draw the TextLayout at (drawPosX, drawPosY).
layout.draw(graphics, drawPosX, drawPosY);
// Move y-coordinate in preparation for next layout.
drawPosY += layout.getDescent() + layout.getLeading();
}
getTextLayers().add(textImage);
}
public void generate() throws IOException {
Dimension size = getMaxSize();
BufferedImage finalImage = new BufferedImage(size.width, size.height,
BufferedImage.TYPE_INT_ARGB);
for (BufferedImage img : getLayers()) {
finalImage.createGraphics().drawImage(img,
0, 0, size.width, size.height,
0, 0, img.getWidth(null),
img.getHeight(null),
null);
}
for(BufferedImage text: getTextLayers()){
finalImage.createGraphics().drawImage(text,
0, 0, text.getWidth(), text.getHeight(),
0, 0, text.getWidth(null),
text.getHeight(null),
null);
}
File outputfile = new File("saved.png");
ImageIO.write(finalImage, "png", outputfile);
}
/**
* @return the textLayers
*/
public ArrayList<BufferedImage> getTextLayers() {
return textLayers;
}
/**
* @param textLayers the textLayers to set
*/
public void setTextLayers(ArrayList<BufferedImage> textLayers) {
this.textLayers = textLayers;
} }
Он все еще нуждается в некоторой доработке, особенно в отношении размещения текста, но он работает. Думаю, я могу реализовать формат xml для хранения всей этой информации, поэтому его легко настроить. В приведенном ниже примере солнце нарисовано поверх дождя, а текст — поверх всего этого. Для моего приложения каждый слой будет собирать страницу, которую я хочу.
