java.awt.image.BufferedImage.getTransparency()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.awt.image.BufferedImage.getTransparency()方法的一些代码示例，展示了BufferedImage.getTransparency()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。BufferedImage.getTransparency()方法的具体详情如下：
包路径：java.awt.image.BufferedImage
类名称：BufferedImage
方法名：getTransparency

BufferedImage.getTransparency介绍

暂无

代码示例

代码示例来源：origin: stackoverflow.com

private BufferedImage toCompatibleImage(BufferedImage image)
{
  // obtain the current system graphical settings
  GraphicsConfiguration gfx_config = GraphicsEnvironment.
    getLocalGraphicsEnvironment().getDefaultScreenDevice().
    getDefaultConfiguration();

  /*
   * if image is already compatible and optimized for current system 
   * settings, simply return it
   */
  if (image.getColorModel().equals(gfx_config.getColorModel()))
    return image;

  // image is not optimized, so create a new image that is
  BufferedImage new_image = gfx_config.createCompatibleImage(
      image.getWidth(), image.getHeight(), image.getTransparency());

  // get the graphics context of the new image to draw the old image on
  Graphics2D g2d = (Graphics2D) new_image.getGraphics();

  // actually draw the image and dispose of context no longer needed
  g2d.drawImage(image, 0, 0, null);
  g2d.dispose();

  // return the new optimized image
  return new_image; 
}

代码示例来源：origin: rkalla/imgscalr

width,
height,
(src.getTransparency() == Transparency.OPAQUE ? BufferedImage.TYPE_INT_RGB
    : BufferedImage.TYPE_INT_ARGB));

代码示例来源：origin: rkalla/imgscalr

int type = (src.getTransparency() == Transparency.OPAQUE ? BufferedImage.TYPE_INT_RGB
    : BufferedImage.TYPE_INT_ARGB);
BufferedImage result = new BufferedImage(src.getWidth(),

代码示例来源：origin: stackoverflow.com

boolean higherQuality)
int type = (img.getTransparency() == Transparency.OPAQUE) ?
  BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
BufferedImage ret = (BufferedImage)img;

代码示例来源：origin: shopizer-ecommerce/shopizer

int targetWidth, int targetHeight, Object hint,
  boolean higherQuality) {
int type = (img.getTransparency() == Transparency.OPAQUE) ? BufferedImage.TYPE_INT_RGB
    : BufferedImage.TYPE_INT_ARGB;
BufferedImage ret = (BufferedImage) img;

代码示例来源：origin: plantuml/plantuml

final int targetWidth = targetDim.width;
final int targetHeight = targetDim.height;
final int type = (img.getTransparency() == Transparency.OPAQUE) ? BufferedImage.TYPE_INT_RGB
    : BufferedImage.TYPE_INT_ARGB;
BufferedImage ret = (BufferedImage) img;

代码示例来源：origin: apache/nifi

if(image.getTransparency() == Transparency.OPAQUE) {
  imageType = BufferedImage.TYPE_INT_RGB;

代码示例来源：origin: rkalla/imgscalr

boolean imageHasAlpha = (src.getTransparency() != BufferedImage.OPAQUE);

代码示例来源：origin: jMonkeyEngine/jmonkeyengine

if (img.getTransparency() == Transparency.OPAQUE){
  ByteBuffer data = BufferUtils.createByteBuffer(img.getWidth()*img.getHeight()*3);

代码示例来源：origin: haraldk/TwelveMonkeys

private static int getTransparency(Image pImage) {
  if (pImage instanceof BufferedImage) {
    BufferedImage bi = (BufferedImage) pImage;
    return bi.getTransparency();
  }
  return Transparency.OPAQUE;
}

代码示例来源：origin: stackoverflow.com

BufferedImage image = ImageIO.read ( url );
BufferedImage convertedImage = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment ();
GraphicsDevice gd = ge.getDefaultScreenDevice ();
GraphicsConfiguration gc = gd.getDefaultConfiguration ();
convertedImage = gc.createCompatibleImage (image.getWidth (), 
                      image.getHeight (), 
                      image.getTransparency () );
Graphics2D g2d = convertedImage.createGraphics ();
g2d.drawImage ( image, 0, 0, image.getWidth (), image.getHeight (), null );
g2d.dispose()

代码示例来源：origin: nguyenq/tess4j

/**
 * Convenience method that returns a scaled instance of the provided
 * {@code BufferedImage}.
 *
 * @param image the original image to be scaled
 * @param targetWidth the desired width of the scaled instance, in pixels
 * @param targetHeight the desired height of the scaled instance, in pixels
 * @return a scaled version of the original {@code BufferedImage}
 */
public static BufferedImage getScaledInstance(BufferedImage image, int targetWidth, int targetHeight) {
  int type = (image.getTransparency() == Transparency.OPAQUE)
      ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
  BufferedImage tmp = new BufferedImage(targetWidth, targetHeight, type);
  Graphics2D g2 = tmp.createGraphics();
  g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
  g2.drawImage(image, 0, 0, targetWidth, targetHeight, null);
  g2.dispose();
  return tmp;
}

代码示例来源：origin: nguyenq/tess4j

/**
 * A replacement for the standard <code>BufferedImage.getSubimage</code>
 * method.
 *
 * @param image
 * @param x the X coordinate of the upper-left corner of the specified
 * rectangular region
 * @param y the Y coordinate of the upper-left corner of the specified
 * rectangular region
 * @param width the width of the specified rectangular region
 * @param height the height of the specified rectangular region
 * @return a BufferedImage that is the subimage of <code>image</code>.
 */
public static BufferedImage getSubImage(BufferedImage image, int x, int y, int width, int height) {
  int type = (image.getTransparency() == Transparency.OPAQUE)
      ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
  BufferedImage tmp = new BufferedImage(width, height, type);
  Graphics2D g2 = tmp.createGraphics();
  g2.drawImage(image.getSubimage(x, y, width, height), 0, 0, null);
  g2.dispose();
  return tmp;
}

代码示例来源：origin: apache/pdfbox

private static BufferedImage getAlphaImage(BufferedImage image) throws IOException
{
  if (!image.getColorModel().hasAlpha())
  {
    return null;
  }
  if (image.getTransparency() == Transparency.BITMASK)
  {
    throw new UnsupportedOperationException("BITMASK Transparency JPEG compression is not" +
        " useful, use LosslessImageFactory instead");
  }
  WritableRaster alphaRaster = image.getAlphaRaster();
  if (alphaRaster == null)
  {
    // happens sometimes (PDFBOX-2654) despite colormodel claiming to have alpha
    return null;
  }
  BufferedImage alphaImage = new BufferedImage(image.getWidth(), image.getHeight(),
      BufferedImage.TYPE_BYTE_GRAY);
  alphaImage.setData(alphaRaster);
  return alphaImage;
}

代码示例来源：origin: apache/pdfbox

int alphaByteIdx = 0;
int alphaBitPos = 7;
int transparency = image.getTransparency();
int apbc = transparency == Transparency.BITMASK ? 1 : 8;
byte[] alphaImageData;

代码示例来源：origin: haraldk/TwelveMonkeys

BufferedImage buffered = (BufferedImage) pImage;
if (buffered.getType() != BufferedImage.TYPE_CUSTOM && equals(buffered.getColorModel(), pConfiguration.getColorModel(buffered.getTransparency()))) {
  return buffered;

代码示例来源：origin: haraldk/TwelveMonkeys

@Test
public void testGetBufferedImageGIF() {
  URL resource = getClass().getResource("/tux.gif");
  assertNotNull(resource);
  Image source = Toolkit.getDefaultToolkit().createImage(resource);
  assertNotNull(source);
  BufferedImageFactory factory = new BufferedImageFactory(source);
  BufferedImage image = factory.getBufferedImage();
  assertEquals(250, image.getWidth());
  assertEquals(250, image.getHeight());
  
  assertEquals(Transparency.BITMASK, image.getTransparency());
  // All corners of image should be fully transparent
  assertEquals(0, image.getRGB(0, 0) >>> 24);
  assertEquals(0, image.getRGB(249, 0) >>> 24);
  assertEquals(0, image.getRGB(0, 249) >>> 24);
  assertEquals(0, image.getRGB(249, 249) >>> 24);
}

代码示例来源：origin: haraldk/TwelveMonkeys

@Test
public void testMultiChannelNoTransparencyPSB() throws IOException {
  PSDImageReader imageReader = createReader();
  // The following PSB is RGB, has 4 channels (1 alpha/auxillary channel), but should be treated as opaque
  try (ImageInputStream stream = ImageIO.createImageInputStream(getClassLoaderResource("/psb/rgb-multichannel-no-transparency.psb"))) {
    imageReader.setInput(stream);
    BufferedImage image = imageReader.read(0);
    assertEquals(Transparency.OPAQUE, image.getTransparency());
  }
}

代码示例来源：origin: haraldk/TwelveMonkeys

@Test
public void testMultiChannelNoTransparencyPSD() throws IOException {
  PSDImageReader imageReader = createReader();
  // The following PSD is RGB, has 4 channels (1 alpha/auxillary channel), but should be treated as opaque
  try (ImageInputStream stream = ImageIO.createImageInputStream(getClassLoaderResource("/psd/rgb-multichannel-no-transparency.psd"))) {
    imageReader.setInput(stream);
    BufferedImage image = imageReader.read(0);
    assertEquals(Transparency.OPAQUE, image.getTransparency());
  }
}

代码示例来源：origin: apache/pdfbox

imageXObject.getCOSObject().setItem(COSName.DECODE_PARMS, decodeParms);
if (image.getTransparency() != Transparency.OPAQUE)

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