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add negative support

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This commit is contained in:
Looly 2019-09-17 17:46:46 +08:00
parent be91b672d2
commit 8b94fa0c5d
2 changed files with 13 additions and 8 deletions
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1
CHANGELOG.md
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@ -6,6 +6,7 @@
## 4.6.7
### 新特性
* 【core】 ImgUtil.rotate支持负数（issue#543@Github）
### Bug修复
-------------------------------------------------------------------------------------------------------------

20
hutool-core/src/main/java/cn/hutool/core/img/Img.java
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@ -202,7 +202,7 @@ public class Img implements Serializable{
// PNG图片特殊处理
if (ImgUtil.IMAGE_TYPE_PNG.equals(this.targetImageType)) {
final AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance((double) scale, (double) scale), null);
final AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(scale, scale), null);
this.targetImage = op.filter(ImgUtil.toBufferedImage(srcImg), null);
} else {
final String scaleStr = Float.toString(scale);
@ -311,7 +311,7 @@ public class Img implements Serializable{
*/
public Img cut(Rectangle rectangle) {
final Image srcImage = getValidSrcImg();
rectangle = fixRectangle(rectangle, srcImage.getWidth(null), srcImage.getHeight(null));
fixRectangle(rectangle, srcImage.getWidth(null), srcImage.getHeight(null));
final ImageFilter cropFilter = new CropImageFilter(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
final Image image = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(srcImage.getSource(), cropFilter));
@ -476,7 +476,7 @@ public class Img implements Serializable{
public Img pressImage(Image pressImg, Rectangle rectangle, float alpha) {
final Image targetImg = getValidSrcImg();
rectangle = fixRectangle(rectangle, targetImg.getWidth(null), targetImg.getHeight(null));
fixRectangle(rectangle, targetImg.getWidth(null), targetImg.getHeight(null));
this.targetImage = draw(ImgUtil.toBufferedImage(targetImg), pressImg, rectangle, alpha);
return this;
}
@ -499,8 +499,8 @@ public class Img implements Serializable{
// 抗锯齿
graphics2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// 从中心旋转
graphics2d.translate((rectangle.width - width) / 2, (rectangle.height - height) / 2);
graphics2d.rotate(Math.toRadians(degree), width / 2, height / 2);
graphics2d.translate((rectangle.width - width) / 2D, (rectangle.height - height) / 2D);
graphics2d.rotate(Math.toRadians(degree), width / 2D, height / 2D);
graphics2d.drawImage(image, 0, 0, null);
graphics2d.dispose();
this.targetImage = targetImg;
@ -631,7 +631,7 @@ public class Img implements Serializable{
}
/**
* 修正矩形框位置，如果{@link Img#setPositionFromCentre(boolean)} 设为{@code true}，则坐标修正为基于图形中心，否则基于左上角
* 修正矩形框位置，如果{@link Img#setPositionBaseCentre(boolean)} 设为{@code true}，则坐标修正为基于图形中心，否则基于左上角
*
* @param rectangle 矩形
* @param baseWidth 参考宽
@ -643,8 +643,8 @@ public class Img implements Serializable{
if (this.positionBaseCentre) {
// 修正图片位置从背景的中心计算
rectangle.setLocation(//
rectangle.x + (int) (Math.abs(baseWidth - rectangle.width) / 2), //
rectangle.y + (int) (Math.abs(baseHeight - rectangle.height) / 2)//
rectangle.x + (Math.abs(baseWidth - rectangle.width) / 2), //
rectangle.y + (Math.abs(baseHeight - rectangle.height) / 2)//
);
}
return rectangle;
@ -660,6 +660,10 @@ public class Img implements Serializable{
* @since 4.1.20
*/
private static Rectangle calcRotatedSize(int width, int height, int degree) {
if(degree < 0){
// 负数角度转换为正数角度
degree += 360;
}
if (degree >= 90) {
if (degree / 90 % 2 == 1) {
int temp = height;