import jexer.bits.Cell;
import jexer.event.TKeypressEvent;
import jexer.event.TMouseEvent;
+import jexer.event.TResizeEvent;
import static jexer.TKeypress.*;
/**
*/
public class TImage extends TWidget {
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Selections for fitting the image to the text cells.
+ */
+ public enum Scale {
+ /**
+ * No scaling.
+ */
+ NONE,
+
+ /**
+ * Stretch/shrink the image in both directions to fully fill the text
+ * area width/height.
+ */
+ STRETCH,
+
+ /**
+ * Scale the image, preserving aspect ratio, to fill the text area
+ * width/height (like letterbox). The background color for the
+ * letterboxed area is specified in scaleBackColor.
+ */
+ SCALE,
+ }
+
// ------------------------------------------------------------------------
// Variables --------------------------------------------------------------
// ------------------------------------------------------------------------
+ /**
+ * Scaling strategy to use.
+ */
+ private Scale scale = Scale.NONE;
+
+ /**
+ * Scaling strategy to use.
+ */
+ private java.awt.Color scaleBackColor = java.awt.Color.BLACK;
+
/**
* The action to perform when the user clicks on the image.
*/
*/
private int clockwise = 0;
+ /**
+ * If true, this widget was resized and a new scaled image must be
+ * produced.
+ */
+ private boolean resized = false;
+
/**
* Left column of the image. 0 is the left-most column.
*/
return;
}
+ if (keypress.equals(kbShiftLeft)) {
+ switch (scale) {
+ case NONE:
+ setScaleType(Scale.SCALE);
+ return;
+ case STRETCH:
+ setScaleType(Scale.NONE);
+ return;
+ case SCALE:
+ setScaleType(Scale.STRETCH);
+ return;
+ }
+ }
+ if (keypress.equals(kbShiftRight)) {
+ switch (scale) {
+ case NONE:
+ setScaleType(Scale.STRETCH);
+ return;
+ case STRETCH:
+ setScaleType(Scale.SCALE);
+ return;
+ case SCALE:
+ setScaleType(Scale.NONE);
+ return;
+ }
+ }
+
// Pass to parent for the things we don't care about.
super.onKeypress(keypress);
}
+ /**
+ * Handle resize events.
+ *
+ * @param event resize event
+ */
+ @Override
+ public void onResize(final TResizeEvent event) {
+ // Get my width/height set correctly.
+ super.onResize(event);
+
+ if (scale == Scale.NONE) {
+ return;
+ }
+ image = null;
+ resized = true;
+ }
+
// ------------------------------------------------------------------------
// TWidget ----------------------------------------------------------------
// ------------------------------------------------------------------------
}
if (image == null) {
- image = scaleImage(originalImage, scaleFactor);
- image = rotateImage(image, clockwise);
+ image = rotateImage(originalImage, clockwise);
+ image = scaleImage(image, scaleFactor, getWidth(), getHeight(),
+ textWidth, textHeight);
}
if ((always == true) ||
+ (resized == true) ||
((textWidth > 0)
&& (textWidth != lastTextWidth)
&& (textHeight > 0)
&& (textHeight != lastTextHeight))
) {
+ resized = false;
+
cellColumns = image.getWidth() / textWidth;
if (cellColumns * textWidth < image.getWidth()) {
cellColumns++;
return cellColumns;
}
+ /**
+ * Get the raw (unprocessed) image.
+ *
+ * @return the image
+ */
+ public BufferedImage getImage() {
+ return originalImage;
+ }
+
+ /**
+ * Set the raw image, and reprocess to make the visible image.
+ *
+ * @param image the new image
+ */
+ public void setImage(final BufferedImage image) {
+ this.originalImage = image;
+ this.image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the visible (processed) image.
+ *
+ * @return the image that is currently on screen
+ */
+ public BufferedImage getVisibleImage() {
+ return image;
+ }
+
+ /**
+ * Get the scaling strategy.
+ *
+ * @return Scale.NONE, Scale.STRETCH, etc.
+ */
+ public Scale getScaleType() {
+ return scale;
+ }
+
+ /**
+ * Set the scaling strategy.
+ *
+ * @param scale Scale.NONE, Scale.STRETCH, etc.
+ */
+ public void setScaleType(final Scale scale) {
+ this.scale = scale;
+ this.image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the scale factor.
+ *
+ * @return the scale factor
+ */
+ public double getScaleFactor() {
+ return scaleFactor;
+ }
+
+ /**
+ * Set the scale factor. 1.0 means no scaling.
+ *
+ * @param scaleFactor the new scale factor
+ */
+ public void setScaleFactor(final double scaleFactor) {
+ this.scaleFactor = scaleFactor;
+ image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the rotation, as degrees.
+ *
+ * @return the rotation in degrees
+ */
+ public int getRotation() {
+ switch (clockwise) {
+ case 0:
+ return 0;
+ case 1:
+ return 90;
+ case 2:
+ return 180;
+ case 3:
+ return 270;
+ default:
+ // Don't know how this happened, but fix it.
+ clockwise = 0;
+ image = null;
+ sizeToImage(true);
+ return 0;
+ }
+ }
+
+ /**
+ * Set the rotation, as degrees clockwise.
+ *
+ * @param rotation 0, 90, 180, or 270
+ */
+ public void setRotation(final int rotation) {
+ switch (rotation) {
+ case 0:
+ clockwise = 0;
+ break;
+ case 90:
+ clockwise = 1;
+ break;
+ case 180:
+ clockwise = 2;
+ break;
+ case 270:
+ clockwise = 3;
+ break;
+ default:
+ // Don't know how this happened, but fix it.
+ clockwise = 0;
+ break;
+ }
+
+ image = null;
+ sizeToImage(true);
+ }
+
/**
* Scale an image by to be scaleFactor size.
*
* @param image the image to scale
* @param factor the scale to make the new image
+ * @param width the number of text cell columns for the destination image
+ * @param height the number of text cell rows for the destination image
+ * @param textWidth the width in pixels for one text cell
+ * @param textHeight the height in pixels for one text cell
*/
private BufferedImage scaleImage(final BufferedImage image,
- final double factor) {
+ final double factor, final int width, final int height,
+ final int textWidth, final int textHeight) {
- if (Math.abs(factor - 1.0) < 0.03) {
+ if ((scale == Scale.NONE) && (Math.abs(factor - 1.0) < 0.03)) {
// If we are within 3% of 1.0, just return the original image.
return image;
}
- int width = (int) (image.getWidth() * factor);
- int height = (int) (image.getHeight() * factor);
+ int destWidth = 0;
+ int destHeight = 0;
+ int x = 0;
+ int y = 0;
- BufferedImage newImage = new BufferedImage(width, height,
- BufferedImage.TYPE_INT_ARGB);
+ BufferedImage newImage = null;
+
+ switch (scale) {
+ case NONE:
+ destWidth = (int) (image.getWidth() * factor);
+ destHeight = (int) (image.getHeight() * factor);
+ newImage = new BufferedImage(destWidth, destHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ case STRETCH:
+ destWidth = width * textWidth;
+ destHeight = height * textHeight;
+ newImage = new BufferedImage(destWidth, destHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ case SCALE:
+ double a = (double) image.getWidth() / image.getHeight();
+ double b = (double) (width * textWidth) / (height * textHeight);
+ assert (a > 0);
+ assert (b > 0);
+
+ /*
+ System.err.println("Scale: original " + image.getWidth() +
+ "x" + image.getHeight());
+ System.err.println(" screen " + (width * textWidth) +
+ "x" + (height * textHeight));
+ System.err.println("A " + a + " B " + b);
+ */
+
+ if (a > b) {
+ // Horizontal letterbox
+ destWidth = width * textWidth;
+ destHeight = (int) (destWidth / a);
+ y = ((height * textHeight) - destHeight) / 2;
+ assert (y >= 0);
+ /*
+ System.err.println("Horizontal letterbox: " + destWidth +
+ "x" + destHeight + ", Y offset " + y);
+ */
+ } else {
+ // Vertical letterbox
+ destHeight = height * textHeight;
+ destWidth = (int) (destHeight * a);
+ x = ((width * textWidth) - destWidth) / 2;
+ assert (x >= 0);
+ /*
+ System.err.println("Vertical letterbox: " + destWidth +
+ "x" + destHeight + ", X offset " + x);
+ */
+ }
+ newImage = new BufferedImage(width * textWidth, height * textHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ }
java.awt.Graphics gr = newImage.createGraphics();
- gr.drawImage(image, 0, 0, width, height, null);
+ if (scale == Scale.SCALE) {
+ gr.setColor(scaleBackColor);
+ gr.fillRect(0, 0, width * textWidth, height * textHeight);
+ }
+ gr.drawImage(image, x, y, destWidth, destHeight, null);
gr.dispose();
-
return newImage;
}
git://git.nikiroo.be / fanfix-jexer.git / commitdiff