| 1 | package be.nikiroo.utils.ui; |
| 2 | |
| 3 | import java.awt.Dimension; |
| 4 | import java.awt.Graphics2D; |
| 5 | import java.awt.geom.AffineTransform; |
| 6 | import java.awt.image.AffineTransformOp; |
| 7 | import java.awt.image.BufferedImage; |
| 8 | import java.io.File; |
| 9 | import java.io.IOException; |
| 10 | import java.io.InputStream; |
| 11 | |
| 12 | import javax.imageio.ImageIO; |
| 13 | |
| 14 | import be.nikiroo.utils.IOUtils; |
| 15 | import be.nikiroo.utils.Image; |
| 16 | import be.nikiroo.utils.ImageUtils; |
| 17 | import be.nikiroo.utils.StringUtils; |
| 18 | |
| 19 | /** |
| 20 | * This class offer some utilities based around images and uses java.awt. |
| 21 | * |
| 22 | * @author niki |
| 23 | */ |
| 24 | public class ImageUtilsAwt extends ImageUtils { |
| 25 | /** |
| 26 | * A rotation to perform on an image. |
| 27 | * |
| 28 | * @author niki |
| 29 | */ |
| 30 | public enum Rotation { |
| 31 | /** No rotation */ |
| 32 | NONE, |
| 33 | /** Rotate the image to the right */ |
| 34 | RIGHT, |
| 35 | /** Rotate the image to the left */ |
| 36 | LEFT, |
| 37 | /** Rotate the image by 180° */ |
| 38 | UTURN |
| 39 | } |
| 40 | |
| 41 | @Override |
| 42 | protected boolean check() { |
| 43 | // Will not work if ImageIO is not available |
| 44 | ImageIO.getCacheDirectory(); |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | public void saveAsImage(Image img, File target, String format) |
| 50 | throws IOException { |
| 51 | try { |
| 52 | BufferedImage image = fromImage(img); |
| 53 | |
| 54 | boolean ok = false; |
| 55 | try { |
| 56 | |
| 57 | ok = ImageIO.write(image, format, target); |
| 58 | } catch (IOException e) { |
| 59 | ok = false; |
| 60 | } |
| 61 | |
| 62 | // Some formats are not reliable |
| 63 | // Second chance: PNG |
| 64 | if (!ok && !format.equals("png")) { |
| 65 | try { |
| 66 | ok = ImageIO.write(image, "png", target); |
| 67 | } catch (IllegalArgumentException e) { |
| 68 | throw e; |
| 69 | } catch (Exception e) { |
| 70 | throw new IOException("Undocumented exception occured, " |
| 71 | + "converting to IOException", e); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | if (!ok) { |
| 76 | throw new IOException( |
| 77 | "Cannot find a writer for this image and format: " |
| 78 | + format); |
| 79 | } |
| 80 | } catch (IOException e) { |
| 81 | throw new IOException("Cannot write image to " + target, e); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Convert the given {@link Image} into a {@link BufferedImage} object, |
| 87 | * respecting the EXIF transformations if any. |
| 88 | * |
| 89 | * @param img |
| 90 | * the {@link Image} |
| 91 | * |
| 92 | * @return the {@link Image} object |
| 93 | * |
| 94 | * @throws IOException |
| 95 | * in case of IO error |
| 96 | */ |
| 97 | public static BufferedImage fromImage(Image img) throws IOException { |
| 98 | return fromImage(img, Rotation.NONE); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Convert the given {@link Image} into a {@link BufferedImage} object, |
| 103 | * respecting the EXIF transformations if any. |
| 104 | * |
| 105 | * @param img |
| 106 | * the {@link Image} |
| 107 | * @param rotation |
| 108 | * the rotation to apply, if any (can be null, same as |
| 109 | * {@link Rotation#NONE}) |
| 110 | * |
| 111 | * @return the {@link Image} object |
| 112 | * |
| 113 | * @throws IOException |
| 114 | * in case of IO error |
| 115 | */ |
| 116 | public static BufferedImage fromImage(Image img, Rotation rotation) |
| 117 | throws IOException { |
| 118 | InputStream in = img.newInputStream(); |
| 119 | BufferedImage image; |
| 120 | try { |
| 121 | int orientation; |
| 122 | try { |
| 123 | orientation = getExifTransorm(in); |
| 124 | } catch (Exception e) { |
| 125 | // no EXIF transform, ok |
| 126 | orientation = -1; |
| 127 | } |
| 128 | |
| 129 | in.reset(); |
| 130 | |
| 131 | try { |
| 132 | image = ImageIO.read(in); |
| 133 | } catch (IllegalArgumentException e) { |
| 134 | throw e; |
| 135 | } catch (Exception e) { |
| 136 | throw new IOException("Undocumented exception occured, " |
| 137 | + "converting to IOException", e); |
| 138 | } |
| 139 | |
| 140 | if (image == null) { |
| 141 | String extra = ""; |
| 142 | if (img.getSize() <= 2048) { |
| 143 | try { |
| 144 | byte[] data = null; |
| 145 | InputStream inData = img.newInputStream(); |
| 146 | try { |
| 147 | data = IOUtils.toByteArray(inData); |
| 148 | } finally { |
| 149 | inData.close(); |
| 150 | } |
| 151 | extra = ", content: " + new String(data, "UTF-8"); |
| 152 | } catch (Exception e) { |
| 153 | extra = ", content unavailable"; |
| 154 | } |
| 155 | } |
| 156 | String ssize = StringUtils.formatNumber(img.getSize()); |
| 157 | throw new IOException( |
| 158 | "Failed to convert input to image, size was: " + ssize |
| 159 | + extra); |
| 160 | } |
| 161 | |
| 162 | // Note: this code has been found on Internet; |
| 163 | // thank you anonymous coder. |
| 164 | int width = image.getWidth(); |
| 165 | int height = image.getHeight(); |
| 166 | AffineTransform affineTransform = new AffineTransform(); |
| 167 | |
| 168 | switch (orientation) { |
| 169 | case 1: |
| 170 | affineTransform = null; |
| 171 | break; |
| 172 | case 2: // Flip X |
| 173 | affineTransform.scale(-1.0, 1.0); |
| 174 | affineTransform.translate(-width, 0); |
| 175 | break; |
| 176 | case 3: // PI rotation |
| 177 | affineTransform.translate(width, height); |
| 178 | affineTransform.rotate(Math.PI); |
| 179 | break; |
| 180 | case 4: // Flip Y |
| 181 | affineTransform.scale(1.0, -1.0); |
| 182 | affineTransform.translate(0, -height); |
| 183 | break; |
| 184 | case 5: // - PI/2 and Flip X |
| 185 | affineTransform.rotate(-Math.PI / 2); |
| 186 | affineTransform.scale(-1.0, 1.0); |
| 187 | break; |
| 188 | case 6: // -PI/2 and -width |
| 189 | affineTransform.translate(height, 0); |
| 190 | affineTransform.rotate(Math.PI / 2); |
| 191 | break; |
| 192 | case 7: // PI/2 and Flip |
| 193 | affineTransform.scale(-1.0, 1.0); |
| 194 | affineTransform.translate(-height, 0); |
| 195 | affineTransform.translate(0, width); |
| 196 | affineTransform.rotate(3 * Math.PI / 2); |
| 197 | break; |
| 198 | case 8: // PI / 2 |
| 199 | affineTransform.translate(0, width); |
| 200 | affineTransform.rotate(3 * Math.PI / 2); |
| 201 | break; |
| 202 | default: |
| 203 | affineTransform = null; |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | if (rotation == null) |
| 208 | rotation = Rotation.NONE; |
| 209 | |
| 210 | switch (rotation) { |
| 211 | case RIGHT: |
| 212 | if (affineTransform == null) { |
| 213 | affineTransform = new AffineTransform(); |
| 214 | } |
| 215 | affineTransform.translate(height, 0); |
| 216 | affineTransform.rotate(Math.PI / 2); |
| 217 | |
| 218 | int tmp = width; |
| 219 | width = height; |
| 220 | height = tmp; |
| 221 | |
| 222 | break; |
| 223 | case LEFT: |
| 224 | if (affineTransform == null) { |
| 225 | affineTransform = new AffineTransform(); |
| 226 | } |
| 227 | affineTransform.translate(0, width); |
| 228 | affineTransform.rotate(3 * Math.PI / 2); |
| 229 | |
| 230 | int temp = width; |
| 231 | width = height; |
| 232 | height = temp; |
| 233 | |
| 234 | break; |
| 235 | case UTURN: |
| 236 | if (affineTransform == null) { |
| 237 | affineTransform = new AffineTransform(); |
| 238 | } |
| 239 | affineTransform.translate(width, height); |
| 240 | affineTransform.rotate(Math.PI); |
| 241 | break; |
| 242 | default: |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | if (affineTransform != null) { |
| 247 | AffineTransformOp affineTransformOp = new AffineTransformOp( |
| 248 | affineTransform, AffineTransformOp.TYPE_BILINEAR); |
| 249 | |
| 250 | BufferedImage transformedImage = new BufferedImage(width, |
| 251 | height, image.getType()); |
| 252 | transformedImage = affineTransformOp.filter(image, |
| 253 | transformedImage); |
| 254 | |
| 255 | image = transformedImage; |
| 256 | } |
| 257 | // |
| 258 | } finally { |
| 259 | in.close(); |
| 260 | } |
| 261 | |
| 262 | return image; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Resize the given image. |
| 267 | * |
| 268 | * @param areaSize |
| 269 | * the base size of the target dimension for snap sizes |
| 270 | * @param image |
| 271 | * the image to resize |
| 272 | * @param zoom |
| 273 | * the zoom factor or -1 for snap size |
| 274 | * @param zoomSnapWidth |
| 275 | * if snap size, TRUE to snap to width (and FALSE, snap to |
| 276 | * height) |
| 277 | * |
| 278 | * @return a new, resized image |
| 279 | */ |
| 280 | public static BufferedImage scaleImage(Dimension areaSize, |
| 281 | BufferedImage image, double zoom, boolean zoomSnapWidth) { |
| 282 | Integer scaledSize[] = scaleSize(areaSize.width, areaSize.height, |
| 283 | image.getWidth(), image.getHeight(), zoom, zoomSnapWidth); |
| 284 | int width = scaledSize[0]; |
| 285 | int height = scaledSize[1]; |
| 286 | BufferedImage resizedImage = new BufferedImage(width, height, |
| 287 | BufferedImage.TYPE_4BYTE_ABGR); |
| 288 | Graphics2D g = resizedImage.createGraphics(); |
| 289 | try { |
| 290 | g.drawImage(image, 0, 0, width, height, null); |
| 291 | } finally { |
| 292 | g.dispose(); |
| 293 | } |
| 294 | |
| 295 | return resizedImage; |
| 296 | } |
| 297 | } |