/**
* 等比例图片缩放.
*
* @param srcFile 源文件
* @param destFile 目标文件
* @param destWidth 目标宽度(>0)
* @param destHeight 目标高度(>0)
*/
public static void zoom(File srcFile, File destFile, int destWidth, int destHeight) {
if (type == Type.jdk) {
try {
BufferedImage srcBufferedImage = ImageIO.read(srcFile);
int srcWidth = srcBufferedImage.getWidth();
int srcHeight = srcBufferedImage.getHeight();
int width = destWidth;
int height = destHeight;
if (srcHeight >= srcWidth) {
width = (int) Math.round(((destHeight * 1.0 / srcHeight) * srcWidth));
} else {
height = (int) Math.round(((destWidth * 1.0 / srcWidth) * srcHeight));
}
BufferedImage destBufferedImage =
new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = destBufferedImage.createGraphics();
graphics2D.setBackground(BACKGROUND_COLOR);
graphics2D.clearRect(0, 0, destWidth, destHeight);
graphics2D.drawImage(
srcBufferedImage.getScaledInstance(width, height, Image.SCALE_SMOOTH),
(destWidth / 2) - (width / 2),
(destHeight / 2) - (height / 2),
null);
graphics2D.dispose();
ImageIO.write(destBufferedImage, FileUtil.getExtension(destFile), destFile);
} catch (IOException e) {
throw new RuntimeException(e);
}
} else {
IMOperation operation = new IMOperation();
operation.thumbnail(destWidth, destHeight);
operation.gravity("center");
operation.background(toHexEncoding(BACKGROUND_COLOR));
operation.extent(destWidth, destHeight);
operation.quality((double) DEST_QUALITY);
operation.addImage(srcFile.getPath());
operation.addImage(destFile.getPath());
if (type == Type.graphicsMagick) {
ConvertCmd convertCmd = new ConvertCmd(true);
if (graphicsMagickPath != null) {
convertCmd.setSearchPath(graphicsMagickPath);
}
try {
convertCmd.run(operation);
} catch (IOException | InterruptedException | IM4JavaException e) {
throw new RuntimeException(e);
}
} else {
ConvertCmd convertCmd = new ConvertCmd(false);
if (imageMagickPath != null) {
convertCmd.setSearchPath(imageMagickPath);
}
try {
convertCmd.run(operation);
} catch (IOException | InterruptedException | IM4JavaException e) {
throw new RuntimeException(e);
}
}
}
}
public static void zoom(File srcFile, File destFile, int destWidth, int destHeight) {
Assert.notNull(srcFile);
Assert.notNull(destFile);
Assert.state(destWidth > 0);
Assert.state(destHeight > 0);
if (type == Type.jdk) {
Graphics2D graphics2D = null;
ImageOutputStream imageOutputStream = null;
ImageWriter imageWriter = null;
try {
BufferedImage srcBufferedImage = ImageIO.read(srcFile);
int srcWidth = srcBufferedImage.getWidth();
int srcHeight = srcBufferedImage.getHeight();
int width = destWidth;
int height = destHeight;
if (srcHeight >= srcWidth) {
width = (int) Math.round(((destHeight * 1.0 / srcHeight) * srcWidth));
} else {
height = (int) Math.round(((destWidth * 1.0 / srcWidth) * srcHeight));
}
BufferedImage destBufferedImage =
new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);
graphics2D = destBufferedImage.createGraphics();
graphics2D.setBackground(BACKGROUND_COLOR);
graphics2D.clearRect(0, 0, destWidth, destHeight);
graphics2D.drawImage(
srcBufferedImage.getScaledInstance(width, height, Image.SCALE_SMOOTH),
(destWidth / 2) - (width / 2),
(destHeight / 2) - (height / 2),
null);
imageOutputStream = ImageIO.createImageOutputStream(destFile);
imageWriter =
ImageIO.getImageWritersByFormatName(FilenameUtils.getExtension(destFile.getName()))
.next();
imageWriter.setOutput(imageOutputStream);
ImageWriteParam imageWriteParam = imageWriter.getDefaultWriteParam();
imageWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
imageWriteParam.setCompressionQuality((float) (DEST_QUALITY / 100.0));
imageWriter.write(null, new IIOImage(destBufferedImage, null, null), imageWriteParam);
imageOutputStream.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (graphics2D != null) {
graphics2D.dispose();
}
if (imageWriter != null) {
imageWriter.dispose();
}
if (imageOutputStream != null) {
try {
imageOutputStream.close();
} catch (IOException e) {
}
}
}
} else {
IMOperation operation = new IMOperation();
operation.thumbnail(destWidth, destHeight);
operation.gravity("center");
operation.background(toHexEncoding(BACKGROUND_COLOR));
operation.extent(destWidth, destHeight);
operation.quality((double) DEST_QUALITY);
operation.addImage(srcFile.getPath());
operation.addImage(destFile.getPath());
if (type == Type.graphicsMagick) {
ConvertCmd convertCmd = new ConvertCmd(true);
if (graphicsMagickPath != null) {
convertCmd.setSearchPath(graphicsMagickPath);
}
try {
convertCmd.run(operation);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (IM4JavaException e) {
e.printStackTrace();
}
} else {
ConvertCmd convertCmd = new ConvertCmd(false);
if (imageMagickPath != null) {
convertCmd.setSearchPath(imageMagickPath);
}
try {
convertCmd.run(operation);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (IM4JavaException e) {
e.printStackTrace();
}
}
}
}