private void assembleOperation(IMOperation op, Parameters params, Dimension fullSize) {
// region transformation
Region region = params.getRegion();
if (!region.isFull()) {
if (region.isPercent()) {
// im4java doesn't support cropping x/y by percentage (only
// width/height), so we have to calculate them.
int x = Math.round(region.getX() / 100.0f * fullSize.width);
int y = Math.round(region.getY() / 100.0f * fullSize.height);
int width = Math.round(region.getWidth());
int height = Math.round(region.getHeight());
op.crop(width, height, x, y, "%");
} else {
op.crop(
Math.round(region.getWidth()), Math.round(region.getHeight()),
Math.round(region.getX()), Math.round(region.getY()));
}
}
// size transformation
Size size = params.getSize();
if (size.getScaleMode() != Size.ScaleMode.FULL) {
if (size.getScaleMode() == Size.ScaleMode.ASPECT_FIT_WIDTH) {
op.resize(size.getWidth());
} else if (size.getScaleMode() == Size.ScaleMode.ASPECT_FIT_HEIGHT) {
op.resize(null, size.getHeight());
} else if (size.getScaleMode() == Size.ScaleMode.NON_ASPECT_FILL) {
op.resize(size.getWidth(), size.getHeight(), "!".charAt(0));
} else if (size.getScaleMode() == Size.ScaleMode.ASPECT_FIT_INSIDE) {
op.resize(size.getWidth(), size.getHeight());
} else if (size.getPercent() != null) {
op.resize(Math.round(size.getPercent()), Math.round(size.getPercent()), "%".charAt(0));
}
}
// rotation transformation
Rotation rotation = params.getRotation();
if (rotation.shouldMirror()) {
op.flop();
}
if (rotation.getDegrees() != 0) {
op.rotate(rotation.getDegrees().doubleValue());
}
// quality transformation
Quality quality = params.getQuality();
if (quality != Quality.COLOR && quality != Quality.DEFAULT) {
switch (quality) {
case GRAY:
op.colorspace("Gray");
break;
case BITONAL:
op.monochrome();
break;
}
}
}
public static BufferedImage ConvertPageToImage(File afile, int i)
throws IOException, InterruptedException, IM4JavaException {
IMOperation op = new IMOperation();
op.addImage(afile.getAbsolutePath() + "[" + i + "]"); // look at myscript.sh
op.colorspace("RGB");
op.resize(640, 830);
op.type("TrueColor");
op.addImage("jpg:-"); // place holder for output file
// op.alpha("off"); //this command is slow and not needed anymore
// op.interpolate("spline");
// op.colorspace("RGB");
ConvertCmd convert = new ConvertCmd();
// convert.setSearchPath("/usr/local/Cellar/imagemagick/6.7.7-6/bin/convert");
// convert.setSearchPath("/usr/bin/convert");
// convert.setSearchPath("/Volumes/Main
// Drive/Users/angellopozo/ImageMagick-6.7.8/bin/convert");
// convert.setSearchPath("Users/angellopozo/ImageMagick-6.7.8/bin/convert");
// convert.setSearchPath("/usr/local/bin");
Stream2BufferedImage s2b = new Stream2BufferedImage();
convert.setOutputConsumer(s2b);
convert.run(op);
// convert.createScript("myscript.sh",op);//debug`` line
BufferedImage aPDF_img = s2b.getImage(); // PDF_img is the pdf_image
ImageIO.write(
aPDF_img,
"jpeg",
new File("Page_" + (i + 1) + "of_PDF.jpg")); // write whole pdf page to png
return aPDF_img;
} // end of ConvertPagetoImage
/**
* 根据尺寸缩放图片
*
* @param width 缩放后的图片宽度
* @param height 缩放后的图片高度
* @param srcPath 源图片路径
* @param newPath 缩放后图片的路径
*/
public static void resizeImage(String srcPath, String newPath, int width, int height)
throws InterruptedException, IOException, IM4JavaException {
IMOperation op = new IMOperation();
op.addImage(srcPath);
op.resize(width, height);
op.addImage(newPath);
// linux下不要设置此值，不然会报错
if (isWin) {
convertCmd.setSearchPath(imageMagickPath);
}
convertCmd.run(op);
}
/**
* 根据尺寸缩放图片[等比例缩放:参数height为null,按宽度缩放比例缩放;参数width为null,按高度缩放比例缩放]
*
* @param imagePath 源图片路径
* @param newPath 处理后图片路径
* @param width 缩放后的图片宽度
* @param height 缩放后的图片高度
* @return 返回true说明缩放成功,否则失败
*/
public static boolean zoomImage(
String imagePath, String newPath, Integer width, Integer height, String quality) {
boolean flag = false;
try {
IMOperation op = new IMOperation();
op.addImage(imagePath);
if (width == null) { // 根据高度缩放图片
op.resize(null, height);
} else if (height == null) { // 根据宽度缩放图片
op.resize(width, null);
} else {
op.resize(width, height);
}
op.addImage(newPath);
if ((quality != null && quality.equals(""))) {
op.addRawArgs("-quality", quality);
}
ConvertCmd convert = new ConvertCmd(true);
if (OS_NAME.indexOf("win") >= 0) {
// linux下不要设置此值，不然会报错
String path = getGraphicsMagickPath();
if (StringUtils.isNotBlank(path)) convert.setSearchPath(path);
}
convert.run(op);
flag = true;
} catch (IOException e) {
flag = false;
e.printStackTrace();
} catch (InterruptedException e) {
flag = false;
e.printStackTrace();
} catch (IM4JavaException e) {
flag = false;
e.printStackTrace();
} finally {
}
return flag;
}
