| 1 | package be.nikiroo.utils.ui; |
| 2 | |
| 3 | import java.awt.geom.AffineTransform; |
| 4 | import java.awt.image.AffineTransformOp; |
| 5 | import java.awt.image.BufferedImage; |
| 6 | import java.io.File; |
| 7 | import java.io.IOException; |
| 8 | import java.io.InputStream; |
| 9 | |
| 10 | import javax.imageio.ImageIO; |
| 11 | |
| 12 | import be.nikiroo.utils.Image; |
| 13 | import be.nikiroo.utils.ImageUtils; |
| 14 | |
| 15 | /** |
| 16 | * This class offer some utilities based around images and uses java.awt. |
| 17 | * |
| 18 | * @author niki |
| 19 | */ |
| 20 | public class ImageUtilsAwt extends ImageUtils { |
| 21 | @Override |
| 22 | protected boolean check() { |
| 23 | // If we can get the class, it means we have access to it |
| 24 | @SuppressWarnings("unused") |
| 25 | Object test = ImageIO.class; |
| 26 | return true; |
| 27 | } |
| 28 | |
| 29 | @Override |
| 30 | public void saveAsImage(Image img, File target, String format) |
| 31 | throws IOException { |
| 32 | try { |
| 33 | BufferedImage image = fromImage(img); |
| 34 | |
| 35 | boolean ok = false; |
| 36 | try { |
| 37 | |
| 38 | ok = ImageIO.write(image, format, target); |
| 39 | } catch (IOException e) { |
| 40 | ok = false; |
| 41 | } |
| 42 | |
| 43 | // Some formats are not reliable |
| 44 | // Second chance: PNG |
| 45 | if (!ok && !format.equals("png")) { |
| 46 | try { |
| 47 | ok = ImageIO.write(image, "png", target); |
| 48 | } catch (IllegalArgumentException e) { |
| 49 | throw e; |
| 50 | } catch (Exception e) { |
| 51 | throw new IOException("Undocumented exception occured, " |
| 52 | + "converting to IOException", e); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | if (!ok) { |
| 57 | throw new IOException( |
| 58 | "Cannot find a writer for this image and format: " |
| 59 | + format); |
| 60 | } |
| 61 | } catch (IOException e) { |
| 62 | throw new IOException("Cannot write image to " + target, e); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Convert the given {@link Image} into a {@link BufferedImage} object, |
| 68 | * respecting the EXIF transformations if any. |
| 69 | * |
| 70 | * @param img |
| 71 | * the {@link Image} |
| 72 | * |
| 73 | * @return the {@link Image} object |
| 74 | * |
| 75 | * @throws IOException |
| 76 | * in case of IO error |
| 77 | */ |
| 78 | public static BufferedImage fromImage(Image img) throws IOException { |
| 79 | InputStream in = img.newInputStream(); |
| 80 | BufferedImage image; |
| 81 | try { |
| 82 | int orientation; |
| 83 | try { |
| 84 | orientation = getExifTransorm(in); |
| 85 | } catch (Exception e) { |
| 86 | // no EXIF transform, ok |
| 87 | orientation = -1; |
| 88 | } |
| 89 | |
| 90 | in.reset(); |
| 91 | |
| 92 | try { |
| 93 | image = ImageIO.read(in); |
| 94 | } catch (IllegalArgumentException e) { |
| 95 | throw e; |
| 96 | } catch (Exception e) { |
| 97 | throw new IOException("Undocumented exception occured, " |
| 98 | + "converting to IOException", e); |
| 99 | } |
| 100 | |
| 101 | if (image == null) { |
| 102 | throw new IOException("Failed to convert input to image"); |
| 103 | } |
| 104 | |
| 105 | // Note: this code has been found on Internet; |
| 106 | // thank you anonymous coder. |
| 107 | int width = image.getWidth(); |
| 108 | int height = image.getHeight(); |
| 109 | AffineTransform affineTransform = new AffineTransform(); |
| 110 | |
| 111 | switch (orientation) { |
| 112 | case 1: |
| 113 | affineTransform = null; |
| 114 | break; |
| 115 | case 2: // Flip X |
| 116 | affineTransform.scale(-1.0, 1.0); |
| 117 | affineTransform.translate(-width, 0); |
| 118 | break; |
| 119 | case 3: // PI rotation |
| 120 | affineTransform.translate(width, height); |
| 121 | affineTransform.rotate(Math.PI); |
| 122 | break; |
| 123 | case 4: // Flip Y |
| 124 | affineTransform.scale(1.0, -1.0); |
| 125 | affineTransform.translate(0, -height); |
| 126 | break; |
| 127 | case 5: // - PI/2 and Flip X |
| 128 | affineTransform.rotate(-Math.PI / 2); |
| 129 | affineTransform.scale(-1.0, 1.0); |
| 130 | break; |
| 131 | case 6: // -PI/2 and -width |
| 132 | affineTransform.translate(height, 0); |
| 133 | affineTransform.rotate(Math.PI / 2); |
| 134 | break; |
| 135 | case 7: // PI/2 and Flip |
| 136 | affineTransform.scale(-1.0, 1.0); |
| 137 | affineTransform.translate(-height, 0); |
| 138 | affineTransform.translate(0, width); |
| 139 | affineTransform.rotate(3 * Math.PI / 2); |
| 140 | break; |
| 141 | case 8: // PI / 2 |
| 142 | affineTransform.translate(0, width); |
| 143 | affineTransform.rotate(3 * Math.PI / 2); |
| 144 | break; |
| 145 | default: |
| 146 | affineTransform = null; |
| 147 | break; |
| 148 | } |
| 149 | |
| 150 | if (affineTransform != null) { |
| 151 | AffineTransformOp affineTransformOp = new AffineTransformOp( |
| 152 | affineTransform, AffineTransformOp.TYPE_BILINEAR); |
| 153 | |
| 154 | BufferedImage transformedImage = new BufferedImage(width, |
| 155 | height, image.getType()); |
| 156 | transformedImage = affineTransformOp.filter(image, |
| 157 | transformedImage); |
| 158 | |
| 159 | image = transformedImage; |
| 160 | } |
| 161 | // |
| 162 | } finally { |
| 163 | in.close(); |
| 164 | } |
| 165 | |
| 166 | return image; |
| 167 | } |
| 168 | } |