java.awt.Graphics2D.clearRect()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中java.awt.Graphics2D.clearRect()方法的一些代码示例，展示了Graphics2D.clearRect()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Graphics2D.clearRect()方法的具体详情如下：
包路径：java.awt.Graphics2D
类名称：Graphics2D
方法名：clearRect

Graphics2D.clearRect介绍

暂无

代码示例

代码示例来源：origin: stackoverflow.com

public static BufferedImage transformImage(BufferedImage image, AffineTransform transform) throws Exception {

  AffineTransformOp op = new AffineTransformOp(transform, AffineTransformOp.TYPE_BICUBIC);

  BufferedImage destinationImage = op.createCompatibleDestImage(image, (image.getType() == BufferedImage.TYPE_BYTE_GRAY) ? image.getColorModel() : null );
  Graphics2D g = destinationImage.createGraphics();
  g.setBackground(Color.WHITE);
  g.clearRect(0, 0, destinationImage.getWidth(), destinationImage.getHeight());
  destinationImage = op.filter(image, destinationImage);
  return destinationImage;
}

代码示例来源：origin: stackoverflow.com

public BufferedImage scaleImage(BufferedImage img, int width, int height,
    Color background) {
  int imgWidth = img.getWidth();
  int imgHeight = img.getHeight();
  if (imgWidth*height < imgHeight*width) {
    width = imgWidth*height/imgHeight;
  } else {
    height = imgHeight*width/imgWidth;
  }
  BufferedImage newImage = new BufferedImage(width, height,
      BufferedImage.TYPE_INT_RGB);
  Graphics2D g = newImage.createGraphics();
  try {
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    g.setBackground(background);
    g.clearRect(0, 0, width, height);
    g.drawImage(img, 0, 0, width, height, null);
  } finally {
    g.dispose();
  }
  return newImage;
}

代码示例来源：origin: redwarp/9-Patch-Resizer

private void enforceBorderColors(BufferedImage inputImage) {
 Graphics2D g = inputImage.createGraphics();
 g.setBackground(new Color(0, 0, 0, 0));
 g.clearRect(1, 1, inputImage.getWidth() - 2, inputImage.getHeight() - 2);
 g.dispose();
 int w = inputImage.getWidth();
 int h = inputImage.getHeight();
 int[] rgb = new int[w * h];
 inputImage.getRGB(0, 0, w, h, rgb, 0, w);
 for (int i = 0; i < rgb.length; i++) {
  if ((0xff000000 & rgb[i]) != 0) {
   rgb[i] = 0xff000000;
  }
 }
 inputImage.setRGB(0, 0, w, h, rgb, 0, w);
 inputImage.setRGB(0, 0, 0x0);
 inputImage.setRGB(0, h - 1, 0x0);
 inputImage.setRGB(w - 1, h - 1, 0x0);
 inputImage.setRGB(w - 1, 0, 0x0);
}

代码示例来源：origin: jersey/jersey

@Path("discrete")
@GET
public Response discrete(
    @DefaultValue("2") @QueryParam("width") final int width,
    @DefaultValue("50") @QueryParam("upper") final int upper,
    @DefaultValue("red") @QueryParam("upper-color") final ColorParam upperColor,
    @DefaultValue("gray") @QueryParam("lower-color") final ColorParam lowerColor
) {
  final BufferedImage image = new BufferedImage(
      data.size() * width - 1, imageHeight, BufferedImage.TYPE_INT_RGB);
  final Graphics2D g = image.createGraphics();
  g.setBackground(Color.WHITE);
  g.clearRect(0, 0, image.getWidth(), image.getHeight());
  final int gap = 4;
  final float d = (limits.width() + 1) / (float) (imageHeight - gap);
  for (int i = 0, x = 0, y; i < data.size(); i++, x += width) {
    final int v = data.get(i);
    g.setColor((v >= upper) ? upperColor : lowerColor);
    y = imageHeight - (int) ((v - limits.lower()) / d);
    g.drawRect(x, y - gap, width - 2, gap);
  }
  return Response.ok(image).tag(tag).build();
}

代码示例来源：origin: loklak/loklak_server

/**
 * Deletes all pixels of image and sets them to previously defined
 * background color.
 */
public final void clear() {
  // fill grid with background color
  final int bgR = (int) (this.backgroundCol >> 16);
  final int bgG = (int) ((this.backgroundCol >> 8) & 0xff);
  final int bgB = (int) (this.backgroundCol & 0xff);
  if (this.frame == null) {
    final Graphics2D gr = this.image.createGraphics();
    Color c = new Color(bgR, bgG, bgB);
    gr.setBackground(c);
    gr.clearRect(0, 0, this.width, this.height);
    gr.setColor(c);
    gr.fillRect(0, 0, this.width, this.height);
  } else {
    int p = 0;
    for (int i = 0; i < width; i++) {
      this.frame[p++] = (byte) bgR;
      this.frame[p++] = (byte) bgG;
      this.frame[p++] = (byte) bgB;
    }
    final int rw = width * 3;
    for (int i = 1; i < height; i++) {
      System.arraycopy(this.frame, 0, this.frame, i * rw, rw);
    }
  }
}

代码示例来源：origin: pentaho/pentaho-kettle

private void drawImage( SwingUniversalImage img, int centerX, int centerY, double angle, int imageSize ) {
 if ( isDrawingPixelatedImages() && img.isBitmap() ) {
  BufferedImage bi =  img.getAsBitmapForSize( imageSize, imageSize, angle );
  int offx = centerX + xOffset - bi.getWidth() / 2;
  int offy = centerY + yOffset - bi.getHeight() / 2;
  for ( int x = 0; x < bi.getWidth( observer ); x++ ) {
   for ( int y = 0; y < bi.getHeight( observer ); y++ ) {
    int rgb = bi.getRGB( x, y );
    gc.setColor( new Color( rgb ) );
    gc.setStroke( new BasicStroke( 1.0f ) );
    gc.drawLine( offx + x, offy + y, offx + x, offy + y );
   }
  }
 } else {
  gc.setBackground( Color.white );
  gc.clearRect( centerX, centerY, imageSize, imageSize );
  img.drawToGraphics( gc, centerX, centerY, imageSize, imageSize, angle );
 }
}

代码示例来源：origin: pentaho/pentaho-kettle

private void drawImage( SwingUniversalImage img, int locationX, int locationY, int imageSize ) {
 if ( isDrawingPixelatedImages() && img.isBitmap() ) {
  BufferedImage bi = new BufferedImage( imageSize, imageSize, BufferedImage.TYPE_INT_ARGB );
  Graphics2D g2 = (Graphics2D) bi.getGraphics();
  g2.setColor( Color.WHITE );
  g2.fillRect( 0, 0, imageSize, imageSize );
  g2.drawImage( img.getAsBitmapForSize( imageSize, imageSize ), 0, 0, observer );
  g2.dispose();
  for ( int x = 0; x < bi.getWidth( observer ); x++ ) {
   for ( int y = 0; y < bi.getHeight( observer ); y++ ) {
    int rgb = bi.getRGB( x, y );
    gc.setColor( new Color( rgb ) );
    gc.setStroke( new BasicStroke( 1.0f ) );
    gc.drawLine( locationX + xOffset + x, locationY + yOffset + y, locationX + xOffset + x, locationY
     + yOffset + y );
   }
  }
 } else {
  gc.setBackground( Color.white );
  gc.clearRect( locationX, locationY, imageSize, imageSize );
  img.drawToGraphics( gc, locationX, locationY, imageSize, imageSize );
 }
}

代码示例来源：origin: jersey/jersey

data.size() * step - 4, imageHeight, BufferedImage.TYPE_INT_RGB);
final Graphics2D g = image.createGraphics();
g.setBackground(Color.WHITE);
g.clearRect(0, 0, image.getWidth(), image.getHeight());

代码示例来源：origin: chewiebug/GCViewer

public void render(GCModel model, FileOutputStream outputStream) throws IOException {
  GCPreferences gcPreferences = new GCPreferences();
  gcPreferences.load();
  Dimension d = new Dimension(gcPreferences.getWindowWidth(), gcPreferences.getWindowHeight());
  BufferedImage image = new BufferedImage(d.width, d.height, BufferedImage.TYPE_INT_RGB);
  Graphics2D graphics = image.createGraphics();
  graphics.setBackground(Color.WHITE);
  graphics.clearRect(0, 0, image.getWidth(), image.getHeight());
  ChartDrawingParameters params
      = new ChartDrawingParameters(model, gcPreferences, d, graphics, image, outputStream);
  if (EventQueue.isDispatchThread()) {
    drawAndSaveToStream(params);
  }
  else {
    new SwingChartToStreamHelper().execute(params);
  }
}

代码示例来源：origin: org.apache.poi/poi-ooxml

graphics.setBackground(Color.white);
graphics.clearRect(0, 0, width, height);

代码示例来源：origin: sarxos/webcam-capture

g2.setBackground(new Color(Math.abs(r++), Math.abs(g++), Math.abs(b++)));
g2.clearRect(0, 0, w, h);

代码示例来源：origin: looly/hutool

g.setBackground(fixedColor);
g.clearRect(0, 0, width, height);

代码示例来源：origin: looly/hutool

g.setBackground(fixedColor);
g.clearRect(0, 0, width, height);

代码示例来源：origin: nutzam/nutz

Graphics2D gc = tarIm.createGraphics();
gc.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gc.setBackground(Strings.isBlank(bgColor) ? Colors.randomColor() : Colors.as(bgColor));
gc.clearRect(0, 0, width, height);

代码示例来源：origin: marytts/marytts

int image_toX = (int) width;
g.setBackground(backgroundColor);
g.clearRect(0, 0, (int) width, (int) height);
g.setFont(new Font("Courier", 0, 10));

代码示例来源：origin: marytts/marytts

int image_toX = (int) width;
g.setBackground(backgroundColor);
g.clearRect(0, 0, (int) width, (int) height);
g.setFont(new Font("Courier", 0, 10));

代码示例来源：origin: nutzam/nutz

Graphics2D gc = im.createGraphics();
gc.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gc.setBackground(colorBg);
gc.clearRect(0, 0, width, height);

代码示例来源：origin: nutzam/nutz

gc = im.createGraphics();
gc.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
gc.setBackground(colorBg);
gc.clearRect(0, 0, width, height);

代码示例来源：origin: winterDroid/android-drawable-importer-intellij-plugin

private static void enforceBorderColors(BufferedImage inputImage) {
  Graphics2D g = inputImage.createGraphics();
  g.setBackground(new Color(0, 0, 0, 0));
  g.clearRect(1, 1, inputImage.getWidth() - 2, inputImage.getHeight() - 2);
  g.dispose();
  int w = inputImage.getWidth();
  int h = inputImage.getHeight();
  int[] rgb = new int[w * h];
  inputImage.getRGB(0, 0, w, h, rgb, 0, w);
  for (int i = 0; i < rgb.length; i++) {
    if ((0xff000000 & rgb[i]) != 0) {
      rgb[i] = 0xff000000;
    }
  }
  inputImage.setRGB(0, 0, w, h, rgb, 0, w);
}

代码示例来源：origin: apache/pdfbox

private BufferedImage renderGlyph(GeneralPath path, Rectangle2D bounds2D, Rectangle cellRect)
  {
    BufferedImage bim = new BufferedImage((int) cellRect.getWidth(), (int) cellRect.getHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics2D g = (Graphics2D) bim.getGraphics();
    g.setBackground(Color.white);
    g.clearRect(0, 0, bim.getWidth(), bim.getHeight());
    double scale = 1 / ((yBounds[1] - yBounds[0]) / cellRect.getHeight());
    // flip
    g.scale(1, -1);
    g.translate(0, -bim.getHeight());
    // horizontal center
    g.translate((cellRect.getWidth() - bounds2D.getWidth() * scale) / 2, 0);
    // scale from the glyph to the cell
    g.scale(scale, scale);
    // Adjust for negative y min bound
    g.translate(0, -yBounds[0]);
    g.setColor(Color.black);
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.fill(path);
    g.dispose();
    return bim;
  }
}

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