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;
+import be.nikiroo.utils.serial.SerialUtils;
/**
* This class offer some utilities based around images.
*
* @author niki
*/
-public class ImageUtils {
+public abstract class ImageUtils {
+ private static ImageUtils instance = newObject();
+
/**
- * Convert the given {@link Image} object into a Base64 representation of
- * the same {@link Image} object.
- *
- * @param image
- * the {@link Image} object to convert
+ * Get a (unique) instance of an {@link ImageUtils} compatible with your
+ * system.
*
- * @return the Base64 representation
- *
- * @throws IOException
- * in case of IO error
+ * @return an {@link ImageUtils}
*/
- static public String toBase64(BufferedImage image) throws IOException {
- return toBase64(image, null);
+ public static ImageUtils getInstance() {
+ return instance;
}
/**
- * Convert the given {@link Image} object into a Base64 representation of
- * the same {@link Image}. object.
+ * Save the given resource as an image on disk using the given image format
+ * for content, or with "png" format if it fails.
*
- * @param image
- * the {@link Image} object to convert
+ * @param img
+ * the resource
+ * @param target
+ * the target file
* @param format
- * the image format to use to serialise it (default is PNG)
- *
- * @return the Base64 representation
+ * the file format ("png", "jpeg", "bmp"...)
*
* @throws IOException
- * in case of IO error
+ * in case of I/O 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;
- }
+ public abstract void saveAsImage(Image img, File target, String format)
+ throws IOException;
/**
- * Convert the given image into a Base64 representation of the same
- * {@link File}.
+ * Scale a dimension.
*
- * @param in
- * the image to convert
*
- * @return the Base64 representation
+ * @param imageWidth
+ * the actual image width
+ * @param imageHeight
+ * the actual image height
+ * @param areaWidth
+ * the base width of the target dimension for snap sizes
+ * @param areaHeight
+ * the base height of the target dimension for snap sizes
+ * @param zoom
+ * the zoom factor (ignored on snap mode)
+ * @param snapMode
+ * NULL for no snap mode, TRUE to snap to width and FALSE for
+ * snap to height)
*
- * @throws IOException
- * in case of IO error
+ * @return the scaled size, width is [0] and height is [1] (minimum is 1x1)
*/
- static public String toBase64(InputStream in) throws IOException {
- String fileString = null;
- ByteArrayOutputStream out = new ByteArrayOutputStream();
-
- byte[] buf = new byte[8192];
+ protected static Integer[] scaleSize(int imageWidth, int imageHeight,
+ int areaWidth, int areaHeight, double zoom, Boolean snapMode) {
+ int width;
+ int height;
+ if (snapMode == null) {
+ width = (int) Math.round(imageWidth * zoom);
+ height = (int) Math.round(imageHeight * zoom);
+ } else if (snapMode) {
+ width = areaWidth;
+ height = (int) Math
+ .round((((double) areaWidth) / imageWidth) * imageHeight);
+ } else {
+ height = areaHeight;
+ width = (int) Math
+ .round((((double) areaHeight) / imageHeight) * imageWidth);
- 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();
+ if (width < 1)
+ width = 1;
+ if (height < 1)
+ height = 1;
- return fileString;
+ return new Integer[] { width, height };
}
- /**
- * 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);
- }
-
- /**
- * 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
- */
- static public BufferedImage fromStream(InputStream in) throws IOException {
- MarkableFileInputStream tmpIn = null;
- File tmp = null;
- try {
- in.reset();
- } catch (IOException e) {
- tmp = File.createTempFile(".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;
- }
-
- /**
- * 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();
- }
-
/**
* Return the EXIF transformation flag of this image if any.
*
* @throws IOException
* in case of IO error
*/
- static private int getExifTransorm(InputStream in) throws IOException {
+ protected static int getExifTransorm(InputStream in) throws IOException {
int[] exif_data = new int[100];
int set_flag = 0;
int is_motorola = 0;
return set_flag;
}
+
+ /**
+ * Check that the class can operate (for instance, that all the required
+ * libraries or frameworks are present).
+ *
+ * @return TRUE if it works
+ */
+ abstract protected boolean check();
+
+ /**
+ * Create a new {@link ImageUtils}.
+ *
+ * @return the {@link ImageUtils}
+ */
+ private static ImageUtils newObject() {
+ for (String clazz : new String[] { "be.nikiroo.utils.ui.ImageUtilsAwt",
+ "be.nikiroo.utils.android.ImageUtilsAndroid" }) {
+ try {
+ ImageUtils obj = (ImageUtils) SerialUtils.createObject(clazz);
+ if (obj.check()) {
+ return obj;
+ }
+ } catch (Throwable e) {
+ }
+ }
+
+ return null;
+ }
}
git://git.nikiroo.be / fanfix.git / blobdiff