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У меня есть код, который выбрать PNG изображение и показывает его в холст в качестве фонового изображения:Прозрачный PNG показывает черный фон в Canvas Java
import java.util.ArrayList;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Label;
import java.awt.AlphaComposite;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import tr.bm.color.Palette;
import and.graphics.Bitmap;
import com.basari.dao.ContentAndDAO;
import com.basari.entity.ContentAnd;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.wb.swt.SWTResourceManager;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.graphics.Point;
public class ColorDraw
{
protected Shell shlDrawPalette;
private Text txtPushCode;
private Text txtUrl;
private static ContentAndDAO dao = new ContentAndDAO();
private Button btnDraw;
private static final int IMG_WIDTH = 100;
private static final int IMG_HEIGHT = 100;
public static void main(String[] args)
{
try
{
ColorDraw window = new ColorDraw();
window.open();
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void open() {
Display display = Display.getDefault();
createContents();
shlDrawPalette.open();
shlDrawPalette.layout();
while (!shlDrawPalette.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
protected void createContents() {
shlDrawPalette = new Shell();
shlDrawPalette.setMinimumSize(new Point(38, 35));
shlDrawPalette.setBackground(SWTResourceManager.getColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));
shlDrawPalette.setSize(729, 649);
shlDrawPalette.setText("Draw Palette");
shlDrawPalette.setLayout(new FormLayout());
txtPushCode = new Text(shlDrawPalette, SWT.BORDER);
FormData fd_txtPushCode = new FormData();
fd_txtPushCode.top = new FormAttachment(0, 18);
fd_txtPushCode.left = new FormAttachment(0, 94);
txtPushCode.setLayoutData(fd_txtPushCode);
txtUrl = new Text(shlDrawPalette, SWT.BORDER);
FormData fd_txtUrl = new FormData();
fd_txtUrl.right = new FormAttachment(0, 519);
fd_txtUrl.top = new FormAttachment(0, 70);
fd_txtUrl.left = new FormAttachment(0, 94);
txtUrl.setLayoutData(fd_txtUrl);
Button btnOk = new Button(shlDrawPalette, SWT.NONE);
FormData fd_btnOk = new FormData();
fd_btnOk.right = new FormAttachment(0, 184);
fd_btnOk.top = new FormAttachment(0, 117);
fd_btnOk.left = new FormAttachment(0, 94);
btnOk.setLayoutData(fd_btnOk);
btnOk.addSelectionListener(new SelectionAdapter()
{
@Override
public void widgetSelected(SelectionEvent e)
{
try
{
if(txtUrl.getText() == "")
{
Long pushCode = Long.valueOf(txtPushCode.getText());
ContentAnd content = dao.getContentAnd(pushCode);
downloadIconPushCode(content);
}
if(txtPushCode.getText() == "")
{
downloadIconUrl(txtUrl.getText());
}
}
catch(Exception ex)
{
String pushCode = txtPushCode.getText();
writeFileNotFound(pushCode);
JOptionPane.showMessageDialog(null, "BÖYLE BİR PUSHCODE YOK, TEKRAR DENEYİN");
ex.getStackTrace();
}
}
});
btnOk.setText("OK");
Label lblPushcode = new Label(shlDrawPalette, SWT.NONE);
FormData fd_lblPushcode = new FormData();
fd_lblPushcode.right = new FormAttachment(0, 80);
fd_lblPushcode.top = new FormAttachment(0, 18);
fd_lblPushcode.left = new FormAttachment(0, 10);
lblPushcode.setLayoutData(fd_lblPushcode);
lblPushcode.setBackground(SWTResourceManager.getColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));
lblPushcode.setText("PushCode");
Label lblUrl = new Label(shlDrawPalette, SWT.NONE);
FormData fd_lblUrl = new FormData();
fd_lblUrl.right = new FormAttachment(0, 80);
fd_lblUrl.top = new FormAttachment(0, 70);
fd_lblUrl.left = new FormAttachment(0, 10);
lblUrl.setLayoutData(fd_lblUrl);
lblUrl.setBackground(SWTResourceManager.getColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));
lblUrl.setText("URL");
Canvas canvBackgroundLightVibrant = new Canvas(shlDrawPalette, SWT.NONE);
FormData fd_canvBackgroundLightVibrant = new FormData();
fd_canvBackgroundLightVibrant.left = new FormAttachment(0, 208);
canvBackgroundLightVibrant.setLayoutData(fd_canvBackgroundLightVibrant);
Canvas canvIconLightVibrant = new Canvas(canvBackgroundLightVibrant, SWT.NONE);
canvIconLightVibrant.setBounds(38, 35, 89, 100);
Canvas canvBackgroundDarkVibrant = new Canvas(shlDrawPalette, SWT.NONE);
fd_canvBackgroundLightVibrant.right = new FormAttachment(canvBackgroundDarkVibrant, -1);
FormData fd_canvBackgroundDarkVibrant = new FormData();
fd_canvBackgroundDarkVibrant.top = new FormAttachment(txtUrl, 114);
fd_canvBackgroundDarkVibrant.left = new FormAttachment(0, 370);
fd_canvBackgroundDarkVibrant.right = new FormAttachment(100, -164);
canvBackgroundDarkVibrant.setLayoutData(fd_canvBackgroundDarkVibrant);
Canvas canvIconDarkVibrant = new Canvas(canvBackgroundDarkVibrant, SWT.NONE);
canvIconDarkVibrant.setBounds(38, 35, 89, 100);
Canvas canvBackgroundMuted = new Canvas(shlDrawPalette, SWT.NONE);
FormData fd_canvBackgroundMuted = new FormData();
fd_canvBackgroundMuted.bottom = new FormAttachment(0, 564);
fd_canvBackgroundMuted.right = new FormAttachment(0, 206);
fd_canvBackgroundMuted.top = new FormAttachment(0, 392);
fd_canvBackgroundMuted.left = new FormAttachment(0, 45);
canvBackgroundMuted.setLayoutData(fd_canvBackgroundMuted);
Canvas canvIconMuted = new Canvas(canvBackgroundMuted, SWT.NONE);
canvIconMuted.setBounds(38, 35, 89, 100);
Canvas canvBackgroundLightMuted = new Canvas(shlDrawPalette, SWT.NONE);
fd_canvBackgroundLightVibrant.bottom = new FormAttachment(canvBackgroundLightMuted, -1);
FormData fd_canvBackgroundLightMuted = new FormData();
fd_canvBackgroundLightMuted.top = new FormAttachment(0, 392);
fd_canvBackgroundLightMuted.bottom = new FormAttachment(canvBackgroundMuted, 0, SWT.BOTTOM);
fd_canvBackgroundLightMuted.right = new FormAttachment(canvBackgroundLightVibrant, 0, SWT.RIGHT);
fd_canvBackgroundLightMuted.left = new FormAttachment(0, 208);
canvBackgroundLightMuted.setLayoutData(fd_canvBackgroundLightMuted);
Canvas canvIconLightMuted = new Canvas(canvBackgroundLightMuted, SWT.NONE);
canvIconLightMuted.setBounds(38, 35, 89, 100);
Label lblLightMuted = new Label(canvBackgroundLightMuted, SWT.NONE);
lblLightMuted.setBounds(38, 0, 88, 20);
lblLightMuted.setText("Light Muted");
Canvas canvBackgroundDarkMuted = new Canvas(shlDrawPalette, SWT.NONE);
fd_canvBackgroundDarkVibrant.bottom = new FormAttachment(canvBackgroundDarkMuted, -1);
FormData fd_canvBackgroundDarkMuted = new FormData();
fd_canvBackgroundDarkMuted.top = new FormAttachment(canvBackgroundMuted, 0, SWT.TOP);
Label lblMuted = new Label(canvBackgroundMuted, SWT.NONE);
lblMuted.setBounds(38, 0, 70, 20);
lblMuted.setText("Muted");
fd_canvBackgroundDarkMuted.left = new FormAttachment(canvBackgroundDarkVibrant, 0, SWT.LEFT);
Label lblDarkVibrant = new Label(canvBackgroundDarkVibrant, SWT.NONE);
lblDarkVibrant.setBounds(38, 0, 99, 20);
lblDarkVibrant.setText("Dark Vibrant");
fd_canvBackgroundDarkMuted.bottom = new FormAttachment(0, 564);
fd_canvBackgroundDarkMuted.right = new FormAttachment(0, 547);
canvBackgroundDarkMuted.setLayoutData(fd_canvBackgroundDarkMuted);
Canvas canvIconDarkMuted = new Canvas(canvBackgroundDarkMuted, SWT.NONE);
canvIconDarkMuted.setBounds(43, 35, 89, 100);
Label lblDarkMuted = new Label(canvBackgroundDarkMuted, SWT.NONE);
lblDarkMuted.setBounds(43, 0, 90, 20);
lblDarkMuted.setText("Dark Muted");
btnDraw = new Button(shlDrawPalette, SWT.NONE);
fd_canvBackgroundLightVibrant.top = new FormAttachment(btnDraw, 63);
Label lblLightVibrant = new Label(canvBackgroundLightVibrant, SWT.NONE);
lblLightVibrant.setBounds(38, 0, 93, 20);
lblLightVibrant.setText("Light Vibrant");
Canvas canvBackgroundVibrant = new Canvas(shlDrawPalette, SWT.NONE);
FormData fd_canvBackgroundVibrant = new FormData();
fd_canvBackgroundVibrant.bottom = new FormAttachment(canvBackgroundLightVibrant, 0, SWT.BOTTOM);
fd_canvBackgroundVibrant.right = new FormAttachment(canvBackgroundMuted, 0, SWT.RIGHT);
fd_canvBackgroundVibrant.top = new FormAttachment(canvBackgroundLightVibrant, 0, SWT.TOP);
fd_canvBackgroundVibrant.left = new FormAttachment(canvBackgroundMuted, 0, SWT.LEFT);
canvBackgroundVibrant.setLayoutData(fd_canvBackgroundVibrant);
Canvas canvIconVibrant = new Canvas(canvBackgroundVibrant, SWT.NONE);
canvIconVibrant.setBounds(38, 35, 89, 100);
Label lblVibrant = new Label(canvBackgroundVibrant, SWT.NONE);
lblVibrant.setBounds(37, 0, 70, 20);
lblVibrant.setText("Vibrant");
FormData fd_btnDraw = new FormData();
fd_btnDraw.right = new FormAttachment(0, 300);
fd_btnDraw.top = new FormAttachment(0, 117);
fd_btnDraw.left = new FormAttachment(0, 210);
btnDraw.setLayoutData(fd_btnDraw);
btnDraw.addSelectionListener(new SelectionAdapter()
{
@Override
public void widgetSelected(SelectionEvent e)
{
try
{
JFrame parentFrame = new JFrame();
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle(txtUrl.getText());
int userSelection = fileChooser.showOpenDialog(parentFrame);
if (userSelection == JFileChooser.APPROVE_OPTION)
{
ArrayList<String> colorList = new ArrayList<String>();
File fileToSave = fileChooser.getSelectedFile();
String fileName = fileToSave.getAbsolutePath();
BufferedImage image = null;
image = ImageIO.read(new File(fileName));
int type = image.getType() == 0? BufferedImage.TYPE_INT_ARGB : image.getType();
BufferedImage resizeImageHintPng = resizeImageWithHint(image, type);
ImageIO.write(resizeImageHintPng, "png", new File(fileName));
Bitmap bitmap = new Bitmap(image);
Palette palette = Palette.generate(bitmap);
int vibrant = palette.getVibrantColor(0xFFFFFF);
int vibrantLight = palette.getLightVibrantColor(0xFFFFFF);
int vibrantDark = palette.getDarkVibrantColor(0xFFFFFF);
int muted = palette.getMutedColor(0xFFFFFF);
int mutedLight = palette.getLightMutedColor(0xFFFFFF);
int mutedDark = palette.getDarkMutedColor(0xFFFFFF);
String hexColor = String.format("#%06X", (0xFFFFFF & vibrant));
colorList.add(hexColor);
canvBackgroundVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconVibrant.setBackgroundImage(SWTResourceManager.getImage(fileName));
canvIconVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
lblVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
hexColor = String.format("#%06X", (0xFFFFFF & vibrantLight));
colorList.add(hexColor);
canvBackgroundLightVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconLightVibrant.setBackgroundImage(SWTResourceManager.getImage(fileName));
lblLightVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
hexColor = String.format("#%06X", (0xFFFFFF & vibrantDark));
colorList.add(hexColor);
canvBackgroundDarkVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconDarkVibrant.setBackgroundImage(SWTResourceManager.getImage(fileName));
lblDarkVibrant.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
hexColor = String.format("#%06X", (0xFFFFFF & muted));
colorList.add(hexColor);
canvBackgroundMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconMuted.setBackgroundImage(SWTResourceManager.getImage(fileName));
lblMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
hexColor = String.format("#%06X", (0xFFFFFF & mutedLight));
colorList.add(hexColor);
canvBackgroundLightMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconLightMuted.setBackgroundImage(SWTResourceManager.getImage(fileName));
lblLightMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
hexColor = String.format("#%06X", (0xFFFFFF & mutedDark));
colorList.add(hexColor);
canvBackgroundDarkMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
canvIconDarkMuted.setBackgroundImage(SWTResourceManager.getImage(fileName));
lblDarkMuted.setBackground(SWTResourceManager.getColor(hex2Rgb(hexColor, 0), hex2Rgb(hexColor, 1), hex2Rgb(hexColor, 2)));
//drawPalet(fileName, colorList);
System.out.println("colorList: " + colorList);
JOptionPane.showMessageDialog(null, "DRAWING IS FINISHED");
}
}
catch(Exception ex)
{
System.out.println("CAN'T DRAW!");
ex.getMessage();
}
}
});
btnDraw.setText("Draw");
}
public static void drawPalet(String fileName, ArrayList<String> colorList)
{
BufferedImage b_img = new BufferedImage(500, 100, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = b_img.createGraphics();
int i=0;
for(String color:colorList)
{
java.awt.Color colorAwt = new java.awt.Color(hex2Rgb(color, 0), hex2Rgb(color, 1), hex2Rgb(color, 2));
System.out.println("hex color: " + color);
graphics.setColor(colorAwt);
graphics.fillRect(i, 0, 100, 100);
i=+100;
System.out.println("colorAwt: " + colorAwt);
}
File outputfile = new File(fileName + "_drawed.jpg");
try
{
ImageIO.write(b_img, "jpg", outputfile);
}
catch (IOException e)
{
e.printStackTrace();
}
}
public static int hex2Rgb(String colorStr, int val) {
if(val == 0)
return (Integer.valueOf(colorStr.substring(1, 3), 16));
else if (val == 1)
return Integer.valueOf(colorStr.substring(3, 5), 16);
else if(val == 2)
return Integer.valueOf(colorStr.substring(5, 7), 16);
else
return 0;
}
private static BufferedImage resizeImageWithHint(BufferedImage originalImage, int type)
{
BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
Graphics2D g = resizedImage.createGraphics();
g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
g.dispose();
g.setComposite(AlphaComposite.Src);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
return resizedImage;
}
public boolean downloadIconUrl(String url)
{
try
{
JFrame parentFrame = new JFrame();
JFileChooser fileChooser = new JFileChooser();
fileChooser.setDialogTitle(txtUrl.getText());
int userSelection = fileChooser.showSaveDialog(parentFrame);
if (userSelection == JFileChooser.APPROVE_OPTION)
{
File fileToSave = fileChooser.getSelectedFile();
System.out.println("Downloaded File: " + fileToSave.getAbsolutePath() + ".png");
String fileName = fileToSave.getAbsolutePath() + ".png";
URL link = new URL(url);
InputStream in = new BufferedInputStream(link.openStream());
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int n = 0;
while (-1 != (n = in.read(buf)))
{
out.write(buf, 0, n);
}
out.close();
in.close();
byte[] response = out.toByteArray();
FileOutputStream fos = new FileOutputStream(fileName);
fos.write(response);
fos.close();
System.out.println("Image File Downloaded");
}
}
catch (IOException ex)
{
ex.printStackTrace();
}
return true;
}
PNG изображения появляются, как это на холсте:
Но как вы можете видеть, its an PNG image with transparent background
Я искал в Интернете и обнаружил, что должен сделать тип BufferedImage как TYPE_INT_ARGB, и мне нужно использовать PNG-изображения. И, как вы можете видеть, мой код такой. Что я делаю не так?
Ссылка на PNG изображение пожалуйста –
* «Извините, но что вы имеете в виду под этим?» * Было бы легче решить, если у нас есть доступ к исходному PNG (с прозрачностью). Можете ли вы вставить этот образ в вопрос? –
ОК Я добавил прозрачное изображение как png – gunes