質問編集履歴
3
変更点追加
test
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test
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@@ -14,71 +14,77 @@
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```java
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public static BufferedImage resizeImage(BufferedImage
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public static BufferedImage resizeImage(BufferedImage srcImage, int resizeWidth,
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int resizeHeight,int resizeDpi) {
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int w = resizeWidth;
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int
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int h = resizeHeight;
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int imageWidth = srcImage.getWidth();
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int imageHeight = srcImage.getHeight();
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if ((imageWidth > imageHeight) && (resizeWidth < resizeHeight)) {
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w = resizeHeight;
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if (rateRsize == rateImg) {
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h = resizeWidth;
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h = resizeHeight;
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}else if (rateRsize > rateImg) {
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w = (int) (resizeHeight * rateImg);
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h = resizeHeight;
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}else{
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w = resizeWidth;
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h = (int) (resizeWidth / rateImg);
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}
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double sx = (double) w / imageWidth;
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ImageProducer p = new FilteredImageSource(bufferedImage.getSource(), filter);
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java.awt.Image dstImage = Toolkit.getDefaultToolkit().createImage(p);
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double sy = (double) h / imageHeight;
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Graphics2D g = dst.createGraphics();
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g.drawImage(dstImage, 0, 0, null);
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g.dispose();
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AffineTransform trans = AffineTransform.getScaleInstance(sx, sy);
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if (sx == sy) {
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}else if (sx > sy) {
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w = (int) (sy * imageWidth);
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trans = AffineTransform.getScaleInstance(sy, sy);
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}else{
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h = (int) (sx * imageHeight);
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trans = AffineTransform.getScaleInstance(sx, sx);
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}
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BufferedImage dstImage = new BufferedImage(w, h, srcImage.getType());
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Graphics2D g2 = (Graphics2D)dstImage.createGraphics();
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g2.drawImage(srcImage, trans, null);
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g2.dispose();
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return dstImage;
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}
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2
内容追加
test
CHANGED
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File without changes
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test
CHANGED
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@@ -7,6 +7,8 @@
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7
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DPIはどう設定しますか？
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サイズとdpiを別々に変更するではなく、一回だけリサイズできないでしょうか？
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1
内容追加
test
CHANGED
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File without changes
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test
CHANGED
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@@ -3,6 +3,10 @@
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3
3
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既存のbufferedImageより、指定width、height、dpiのbufferedImageを取得したいですが、
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何かいい方法がありますでしょうか？
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DPIはどう設定しますか？
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10
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@@ -14,7 +18,65 @@
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int imageWidth = bufferedImage.getWidth();
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int imageHeight = bufferedImage.getHeight();
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double rateImg = imageWidth/imageHeight;
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double rateRsize = resizeWidth/resizeHeight;
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int w;
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int h;
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if (rateRsize == rateImg) {
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w = resizeWidth;
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h = resizeHeight;
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}else if (rateRsize > rateImg) {
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w = (int) (resizeHeight * rateImg);
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h = resizeHeight;
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}else{
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w = resizeWidth;
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h = (int) (resizeWidth / rateImg);
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}
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ImageFilter filter = new AreaAveragingScaleFilter(w, h);
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ImageProducer p = new FilteredImageSource(bufferedImage.getSource(), filter);
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java.awt.Image dstImage = Toolkit.getDefaultToolkit().createImage(p);
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BufferedImage dst = new BufferedImage(w, h, bufferedImage.getType());
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Graphics2D g = dst.createGraphics();
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g.drawImage(dstImage, 0, 0, null);
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g.dispose();
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return dst;
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}
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