package be.nikiroo.utils;
-import java.awt.Image;
-import java.awt.geom.AffineTransform;
-import java.awt.image.AffineTransformOp;
-import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
-import javax.imageio.ImageIO;
-
/**
* This class offer some utilities based around Streams.
*
}
}
- /**
- * Convert the given {@link InputStream} (which should allow calls to
- * {@link InputStream#reset() for better perfs}) into an {@link Image}
- * object, respecting the EXIF transformations if any.
- *
- * @param in
- * the 'resetable' {@link InputStream}
- *
- * @return the {@link Image} object
- *
- * @throws IOException
- * in case of IO error
- */
- public static BufferedImage toImage(InputStream in) throws IOException {
- MarkableFileInputStream tmpIn = null;
- File tmp = null;
- try {
- in.reset();
- } catch (IOException e) {
- tmp = File.createTempFile("fanfic-tmp-image", ".tmp");
- tmp.deleteOnExit();
- IOUtils.write(in, tmp);
- tmpIn = new MarkableFileInputStream(new FileInputStream(tmp));
- }
-
- int orientation;
- try {
- orientation = getExifTransorm(in);
- } catch (Exception e) {
- // no EXIF transform, ok
- orientation = -1;
- }
-
- in.reset();
- BufferedImage image = ImageIO.read(in);
-
- if (image == null) {
- if (tmp != null) {
- tmp.delete();
- tmpIn.close();
- }
- throw new IOException("Failed to convert input to image");
- }
-
- // Note: this code has been found on internet;
- // thank you anonymous coder.
- int width = image.getWidth();
- int height = image.getHeight();
- AffineTransform affineTransform = new AffineTransform();
-
- switch (orientation) {
- case 1:
- affineTransform = null;
- break;
- case 2: // Flip X
- affineTransform.scale(-1.0, 1.0);
- affineTransform.translate(-width, 0);
- break;
- case 3: // PI rotation
- affineTransform.translate(width, height);
- affineTransform.rotate(Math.PI);
- break;
- case 4: // Flip Y
- affineTransform.scale(1.0, -1.0);
- affineTransform.translate(0, -height);
- break;
- case 5: // - PI/2 and Flip X
- affineTransform.rotate(-Math.PI / 2);
- affineTransform.scale(-1.0, 1.0);
- break;
- case 6: // -PI/2 and -width
- affineTransform.translate(height, 0);
- affineTransform.rotate(Math.PI / 2);
- break;
- case 7: // PI/2 and Flip
- affineTransform.scale(-1.0, 1.0);
- affineTransform.translate(-height, 0);
- affineTransform.translate(0, width);
- affineTransform.rotate(3 * Math.PI / 2);
- break;
- case 8: // PI / 2
- affineTransform.translate(0, width);
- affineTransform.rotate(3 * Math.PI / 2);
- break;
- default:
- affineTransform = null;
- break;
- }
-
- if (affineTransform != null) {
- AffineTransformOp affineTransformOp = new AffineTransformOp(
- affineTransform, AffineTransformOp.TYPE_BILINEAR);
-
- BufferedImage transformedImage = new BufferedImage(width, height,
- image.getType());
- transformedImage = affineTransformOp
- .filter(image, transformedImage);
-
- image = transformedImage;
- }
- //
-
- if (tmp != null) {
- tmp.delete();
- tmpIn.close();
- }
-
- return image;
- }
-
/**
* Open the given /-separated resource (from the binary root).
*
return loader.getResourceAsStream(name);
}
-
- /**
- * Return the EXIF transformation flag of this image if any.
- *
- * <p>
- * Note: this code has been found on internet; thank you anonymous coder.
- * </p>
- *
- * @param in
- * the data {@link InputStream}
- *
- * @return the transformation flag if any
- *
- * @throws IOException
- * in case of IO error
- */
- private static int getExifTransorm(InputStream in) throws IOException {
- int[] exif_data = new int[100];
- int set_flag = 0;
- int is_motorola = 0;
-
- /* Read File head, check for JPEG SOI + Exif APP1 */
- for (int i = 0; i < 4; i++)
- exif_data[i] = in.read();
-
- if (exif_data[0] != 0xFF || exif_data[1] != 0xD8
- || exif_data[2] != 0xFF || exif_data[3] != 0xE1)
- return -2;
-
- /* Get the marker parameter length count */
- int length = (in.read() << 8 | in.read());
-
- /* Length includes itself, so must be at least 2 */
- /* Following Exif data length must be at least 6 */
- if (length < 8)
- return -1;
- length -= 8;
- /* Read Exif head, check for "Exif" */
- for (int i = 0; i < 6; i++)
- exif_data[i] = in.read();
-
- if (exif_data[0] != 0x45 || exif_data[1] != 0x78
- || exif_data[2] != 0x69 || exif_data[3] != 0x66
- || exif_data[4] != 0 || exif_data[5] != 0)
- return -1;
-
- /* Read Exif body */
- length = length > exif_data.length ? exif_data.length : length;
- for (int i = 0; i < length; i++)
- exif_data[i] = in.read();
-
- if (length < 12)
- return -1; /* Length of an IFD entry */
-
- /* Discover byte order */
- if (exif_data[0] == 0x49 && exif_data[1] == 0x49)
- is_motorola = 0;
- else if (exif_data[0] == 0x4D && exif_data[1] == 0x4D)
- is_motorola = 1;
- else
- return -1;
-
- /* Check Tag Mark */
- if (is_motorola == 1) {
- if (exif_data[2] != 0)
- return -1;
- if (exif_data[3] != 0x2A)
- return -1;
- } else {
- if (exif_data[3] != 0)
- return -1;
- if (exif_data[2] != 0x2A)
- return -1;
- }
-
- /* Get first IFD offset (offset to IFD0) */
- int offset;
- if (is_motorola == 1) {
- if (exif_data[4] != 0)
- return -1;
- if (exif_data[5] != 0)
- return -1;
- offset = exif_data[6];
- offset <<= 8;
- offset += exif_data[7];
- } else {
- if (exif_data[7] != 0)
- return -1;
- if (exif_data[6] != 0)
- return -1;
- offset = exif_data[5];
- offset <<= 8;
- offset += exif_data[4];
- }
- if (offset > length - 2)
- return -1; /* check end of data segment */
-
- /* Get the number of directory entries contained in this IFD */
- int number_of_tags;
- if (is_motorola == 1) {
- number_of_tags = exif_data[offset];
- number_of_tags <<= 8;
- number_of_tags += exif_data[offset + 1];
- } else {
- number_of_tags = exif_data[offset + 1];
- number_of_tags <<= 8;
- number_of_tags += exif_data[offset];
- }
- if (number_of_tags == 0)
- return -1;
- offset += 2;
-
- /* Search for Orientation Tag in IFD0 */
- for (;;) {
- if (offset > length - 12)
- return -1; /* check end of data segment */
- /* Get Tag number */
- int tagnum;
- if (is_motorola == 1) {
- tagnum = exif_data[offset];
- tagnum <<= 8;
- tagnum += exif_data[offset + 1];
- } else {
- tagnum = exif_data[offset + 1];
- tagnum <<= 8;
- tagnum += exif_data[offset];
- }
- if (tagnum == 0x0112)
- break; /* found Orientation Tag */
- if (--number_of_tags == 0)
- return -1;
- offset += 12;
- }
-
- /* Get the Orientation value */
- if (is_motorola == 1) {
- if (exif_data[offset + 8] != 0)
- return -1;
- set_flag = exif_data[offset + 9];
- } else {
- if (exif_data[offset + 9] != 0)
- return -1;
- set_flag = exif_data[offset + 8];
- }
- if (set_flag > 8)
- return -1;
-
- return set_flag;
- }
}
git://git.nikiroo.be / nikiroo-utils.git / blobdiff