X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2FImageUtils.java;h=fb869294f2029bd1c0fd7f4a64680259ca4bc4b0;hb=aa9c3626f962e59ac7460d8ac6645a6e30a4d248;hp=496d2ead7155b8cd21f0989a17e9e98e43737faf;hpb=4b7d32e77cf31ca44c5f93f08d2729357c86b93f;p=nikiroo-utils.git diff --git a/src/be/nikiroo/utils/ImageUtils.java b/src/be/nikiroo/utils/ImageUtils.java deleted file mode 100644 index 496d2ea..0000000 --- a/src/be/nikiroo/utils/ImageUtils.java +++ /dev/null @@ -1,427 +0,0 @@ -package be.nikiroo.utils; - -import java.awt.Dimension; -import java.awt.Image; -import java.awt.geom.AffineTransform; -import java.awt.image.AffineTransformOp; -import java.awt.image.BufferedImage; -import java.io.ByteArrayInputStream; -import java.io.ByteArrayOutputStream; -import java.io.File; -import java.io.FileInputStream; -import java.io.IOException; -import java.io.InputStream; - -import javax.imageio.ImageIO; - -import be.nikiroo.utils.ImageText.Mode; - -/** - * This class offer some utilities based around images. - * - * @author niki - */ -public class ImageUtils { - /** - * Convert the given {@link Image} object into a Base64 representation of - * the same {@link Image} object. - * - * @param image - * the {@link Image} object to convert - * - * @return the Base64 representation - * - * @throws IOException - * in case of IO error - */ - static public String toBase64(BufferedImage image) throws IOException { - return toBase64(image, null); - } - - /** - * Convert the given {@link Image} object into a Base64 representation of - * the same {@link Image}. object. - * - * @param image - * the {@link Image} object to convert - * @param format - * the image format to use to serialise it (default is PNG) - * - * @return the Base64 representation - * - * @throws IOException - * in case of IO error - */ - static public String toBase64(BufferedImage image, String format) - throws IOException { - if (format == null) { - format = "png"; - } - - String imageString = null; - ByteArrayOutputStream out = new ByteArrayOutputStream(); - - ImageIO.write(image, format, out); - byte[] imageBytes = out.toByteArray(); - - imageString = new String(Base64.encodeBytes(imageBytes)); - - out.close(); - - return imageString; - } - - /** - * Convert the given image into a Base64 representation of the same - * {@link File}. - * - * @param in - * the image to convert - * - * @return the Base64 representation - * - * @throws IOException - * in case of IO error - */ - static public String toBase64(InputStream in) throws IOException { - String fileString = null; - ByteArrayOutputStream out = new ByteArrayOutputStream(); - - byte[] buf = new byte[8192]; - - int c = 0; - while ((c = in.read(buf, 0, buf.length)) > 0) { - out.write(buf, 0, c); - } - out.flush(); - in.close(); - - fileString = new String(Base64.encodeBytes(out.toByteArray())); - out.close(); - - return fileString; - } - - /** - * Convert the given Base64 representation of an image into an {@link Image} - * object. - * - * @param b64data - * the {@link Image} in Base64 format - * - * @return the {@link Image} object - * - * @throws IOException - * in case of IO error - */ - static public BufferedImage fromBase64(String b64data) throws IOException { - ByteArrayInputStream in = new ByteArrayInputStream( - Base64.decode(b64data)); - return fromStream(in); - } - - /** - * A shorthand method to create an {@link ImageText} and return its output. - * - * @param image - * the source {@link Image} - * @param size - * the final text size to target - * @param mode - * the mode of conversion - * @param invert - * TRUE to invert colours rendering - * - * @return the text image - */ - static public String toAscii(Image image, Dimension size, Mode mode, - boolean invert) { - return new ImageText(image, size, mode, invert).toString(); - } - - /** - * 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 {@link InputStream} - * - * @return the {@link Image} object - * - * @throws IOException - * in case of IO error - */ - static public BufferedImage fromStream(InputStream in) throws IOException { - MarkableFileInputStream tmpIn = null; - File tmp = null; - - boolean resetable = in.markSupported(); - if (resetable) { - try { - in.reset(); - } catch (IOException e) { - resetable = false; - } - } - - if (resetable) { - return fromResetableStream(in); - } - - tmp = File.createTempFile(".tmp-image", ".tmp"); - try { - IOUtils.write(in, tmp); - tmpIn = new MarkableFileInputStream(new FileInputStream(tmp)); - return fromResetableStream(tmpIn); - } finally { - try { - if (tmpIn != null) { - tmpIn.close(); - } - } finally { - tmp.delete(); - } - } - } - - /** - * Convert the given resetable {@link InputStream} into an {@link Image} - * object, respecting the EXIF transformations if any. - * - * @param in - * the 'resetable' (this is mandatory) {@link InputStream} - * - * @return the {@link Image} object - * - * @throws IOException - * in case of IO error - */ - static private BufferedImage fromResetableStream(InputStream in) - throws IOException { - - 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) { - 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; - } - // - - return image; - } - - /** - * Return the EXIF transformation flag of this image if any. - * - *

- * Note: this code has been found on internet; thank you anonymous coder. - *

- * - * @param in - * the data {@link InputStream} - * - * @return the transformation flag if any - * - * @throws IOException - * in case of IO error - */ - static private 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; - } -}