/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.eclipse.org/org/documents/epl-v10.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.eclipse.adt.internal.editors.layout.gle2;
import com.android.ide.common.api.Rect;
import org.eclipse.swt.graphics.Rectangle;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;
public class ImageUtilsTest extends TestCase {
public void testCropBlank() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, null);
assertNull(crop);
}
public void testCropBlankPre() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, new Rect(5, 5, 80, 80));
assertNull(crop);
}
public void testCropNonblank() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, false));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, null);
assertNotNull(crop);
assertEquals(image.getWidth(), crop.getWidth());
assertEquals(image.getHeight(), crop.getHeight());
}
public void testCropSomething() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, null);
assertNotNull(crop);
assertEquals(50, crop.getWidth());
assertEquals(50, crop.getHeight());
assertEquals(0xFF00FF00, crop.getRGB(0, 0));
assertEquals(0xFF00FF00, crop.getRGB(49, 49));
}
public void testCropSomethingPre() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, new Rect(0, 0, 100, 100));
assertNotNull(crop);
assertEquals(50, crop.getWidth());
assertEquals(50, crop.getHeight());
assertEquals(0xFF00FF00, crop.getRGB(0, 0));
assertEquals(0xFF00FF00, crop.getRGB(49, 49));
}
public void testCropSomethingPre2() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage crop = ImageUtils.cropBlank(image, new Rect(5, 5, 80, 80));
assertNotNull(crop);
assertEquals(50, crop.getWidth());
assertEquals(50, crop.getHeight());
assertEquals(0xFF00FF00, crop.getRGB(0, 0));
assertEquals(0xFF00FF00, crop.getRGB(49, 49));
}
public void testCropColor() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropColor(image, 0xFF00FF00, null);
assertNull(crop);
}
public void testCropNonColor() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropColor(image, 0xFFFF0000, null);
assertNotNull(crop);
assertEquals(image.getWidth(), crop.getWidth());
assertEquals(image.getHeight(), crop.getHeight());
}
public void testCropColorSomething() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFFFF0000, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage crop = ImageUtils.cropColor(image, 0xFF00FF00, null);
assertEquals(50, crop.getWidth());
assertEquals(50, crop.getHeight());
assertEquals(0xFFFF0000, crop.getRGB(0, 0));
assertEquals(0xFFFF0000, crop.getRGB(49, 49));
}
public void testNullOk() throws Exception {
ImageUtils.cropBlank(null, null);
ImageUtils.cropColor(null, 0, null);
}
public void testNothingTodo() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
BufferedImage crop = ImageUtils.cropColor(image, 0xFFFF0000, new Rect(40, 40, 0, 0));
assertNull(crop);
}
public void testContainsDarkPixels() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
assertFalse(ImageUtils.containsDarkPixels(image));
image.setRGB(50, 50, 0xFFFFFFFF);
assertFalse(ImageUtils.containsDarkPixels(image));
image.setRGB(50, 50, 0xFFAAAAAA);
assertFalse(ImageUtils.containsDarkPixels(image));
image.setRGB(50, 50, 0xFF00FF00);
assertFalse(ImageUtils.containsDarkPixels(image));
image.setRGB(50, 50, 0xFFFF8800);
assertFalse(ImageUtils.containsDarkPixels(image));
image.setRGB(50, 50, 0xFF333333);
assertTrue(ImageUtils.containsDarkPixels(image));
}
public void testGetBoundingRectangle() {
assertEquals(null, ImageUtils.getBoundingRectangle(Collections.<Rectangle> emptyList()));
assertEquals(new Rectangle(1, 2, 3, 4), ImageUtils.getBoundingRectangle(Arrays
.asList(new Rectangle(1, 2, 3, 4))));
assertEquals(new Rectangle(1, 2, 3, 4), ImageUtils.getBoundingRectangle(Arrays
.asList(new Rectangle(1, 2, 3, 4), new Rectangle(1, 2, 1, 1))));
assertEquals(new Rectangle(5, 5, 25, 25), ImageUtils.getBoundingRectangle(Arrays.asList(
new Rectangle(10, 10, 20, 20), new Rectangle(5, 5, 1, 1))));
}
/**
* Paints a set of {@link Rectangle} object out of a rendered {@link BufferedImage}
* such that the resulting image is transparent except for a minimum bounding
* rectangle of the selected elements.
*
* @param image the source image
* @param rectangles the set of rectangles to copy
* @param boundingBox the bounding rectangle of the set of rectangles to copy, can be
* computed by {@link ImageUtils#getBoundingRectangle}
* @param scale a scale factor to apply to the result, e.g. 0.5 to shrink the
* destination down 50%, 1.0 to leave it alone and 2.0 to zoom in by
* doubling the image size
* @return a rendered image, or null
*/
public static BufferedImage drawRectangles(BufferedImage image,
List<Rectangle> rectangles, Rectangle boundingBox, double scale) {
// This code is not a test. When I implemented image cropping, I first implemented
// it for BufferedImages (since it's easier; easy image painting, easy scaling,
// easy transparency handling, etc). However, this meant that we would need to
// convert the SWT images from the ImageOverlay to BufferedImages, crop and convert
// back; not ideal, so I rewrote it in SWT (see SwtUtils). However, I
// don't want to throw away the code in case we start keeping BufferedImages rather
// than SWT images or need it for other purposes, but rather than place it in the
// production codebase I'm leaving this utility here in the associated ImageUtils
// test class. It was used like this:
// @formatter:off
//
// BufferedImage wholeImage = SwtUtils.convertToAwt(image);
// BufferedImage result = ImageUtils.cropSelection(wholeImage,
// rectangles, boundingBox, scale);
// e.image = SwtUtils.convertToSwt(image.getDevice(), result, true,
// DRAG_TRANSPARENCY);
//
// @formatter:on
if (boundingBox == null) {
return null;
}
int destWidth = (int) (scale * boundingBox.width);
int destHeight = (int) (scale * boundingBox.height);
BufferedImage dest = new BufferedImage(destWidth, destHeight, image.getType());
Graphics2D g = dest.createGraphics();
for (Rectangle bounds : rectangles) {
int dx1 = bounds.x - boundingBox.x;
int dy1 = bounds.y - boundingBox.y;
int dx2 = dx1 + bounds.width;
int dy2 = dy1 + bounds.height;
dx1 *= scale;
dy1 *= scale;
dx2 *= scale;
dy2 *= scale;
int sx1 = bounds.x;
int sy1 = bounds.y;
int sx2 = sx1 + bounds.width;
int sy2 = sy1 + bounds.height;
g.drawImage(image, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null);
}
g.dispose();
return dest;
}
public void testSubImage() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFFFF0000, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage sub = ImageUtils.subImage(image, 25, 25, 35, 45);
assertEquals(10, sub.getWidth());
assertEquals(20, sub.getHeight());
assertEquals(0xFFFF0000, sub.getRGB(0, 0));
assertEquals(0xFFFF0000, sub.getRGB(9, 9));
sub = ImageUtils.subImage(image, 23, 23, 23 + 5, 23 + 5);
assertEquals(5, sub.getWidth());
assertEquals(5, sub.getHeight());
assertEquals(0xFF00FF00, sub.getRGB(0, 0));
assertEquals(0xFFFF0000, sub.getRGB(4, 4));
}
public void testGetColor() throws Exception {
assertEquals(0xFF000000, ImageUtils.getColor("#000"));
assertEquals(0xFF000000, ImageUtils.getColor("#000000"));
assertEquals(0xABCDEF91, ImageUtils.getColor("#ABCDEF91"));
}
public void testGetBrightness() throws Exception {
assertEquals(96, ImageUtils.getBrightness(0x456789));
assertEquals(198, ImageUtils.getBrightness(0xABCDEF));
assertEquals(0, ImageUtils.getBrightness(0x0));
assertEquals(255, ImageUtils.getBrightness(0xFFFFFF));
assertEquals(299*255/1000, ImageUtils.getBrightness(0xFF0000));
assertEquals(587*255/1000, ImageUtils.getBrightness(0x00FF00));
assertEquals(114*255/1000, ImageUtils.getBrightness(0x0000FF));
}
public void testColorConversion() throws Exception {
assertEquals(0, ImageUtils.rgbToInt(ImageUtils.intToRgb(0), 0));
assertEquals(0xFFFFFFFF, ImageUtils.rgbToInt(ImageUtils.intToRgb(0xFFFFFF), 0xFF));
assertEquals(0x12345678, ImageUtils.rgbToInt(ImageUtils.intToRgb(0x345678), 0x12));
}
public void testScaleImage() throws Exception {
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = image.getGraphics();
g.setColor(new Color(0xFF00FF00, true));
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.setColor(new Color(0xFFFF0000, true));
g.fillRect(25, 25, 50, 50);
g.dispose();
BufferedImage scaled = ImageUtils.scale(image, 0.5, 0.5);
assertEquals(50, scaled.getWidth());
assertEquals(50, scaled.getHeight());
assertEquals(0xFF00FF00, scaled.getRGB(0, 0));
assertEquals(0xFF00FF00, scaled.getRGB(49, 49));
assertEquals(0xFFFF0000, scaled.getRGB(25, 25));
scaled = ImageUtils.scale(image, 2.0, 2.0);
assertEquals(200, scaled.getWidth());
assertEquals(200, scaled.getHeight());
assertEquals(0xFF00FF00, scaled.getRGB(0, 0));
assertEquals(0xFF00FF00, scaled.getRGB(48, 48));
assertEquals(0xFFFF0000, scaled.getRGB(100, 100));
assertEquals(0xFF00FF00, scaled.getRGB(199, 199));
}
}