/*
* 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.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;
public class SwtUtilsTest extends TestCase {
public void testImageConvertNoAlpha() throws Exception {
// Note: We need an TYPE_INT_ARGB SWT image here (instead of TYPE_INT_ARGB_PRE) to
// prevent the alpha from being pre-multiplied into the RGB when drawing the image.
BufferedImage inImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = inImage.getGraphics();
g.setColor(new Color(0xAA112233, true));
g.fillRect(0, 0, inImage.getWidth(), inImage.getHeight());
g.dispose();
Shell shell = new Shell();
Display display = shell.getDisplay();
// Convert the RGB image, effectively discarding the alpha channel entirely.
Image outImage = SwtUtils.convertToSwt(display, inImage, false, -1);
assertNotNull(outImage);
ImageData outData = outImage.getImageData();
assertEquals(inImage.getWidth(), outData.width);
assertEquals(inImage.getHeight(), outData.height);
assertNull(outData.alphaData);
assertEquals(SWT.TRANSPARENCY_NONE, outData.getTransparencyType());
PaletteData inPalette = SwtUtils.getAwtPaletteData(inImage.getType());
PaletteData outPalette = outData.palette;
for (int y = 0; y < outData.height; y++) {
for (int x = 0; x < outData.width; x++) {
// Note: we can't compare pixel directly as integers since convertToSwt() might
// have changed the RGBA ordering depending on the platform (e.g. it will on
// Windows.)
RGB expected = inPalette.getRGB( inImage.getRGB( x, y));
RGB actual = outPalette.getRGB(outData.getPixel(x, y));
assertEquals(expected, actual);
}
}
// Convert back to AWT and compare with original AWT image
BufferedImage awtImage = SwtUtils.convertToAwt(outImage);
assertNotNull(awtImage);
// Both image have the same RGBA ordering
assertEquals(BufferedImage.TYPE_INT_ARGB, inImage.getType());
assertEquals(BufferedImage.TYPE_INT_ARGB, awtImage.getType());
int awtAlphaMask = 0xFF000000;
for (int y = 0; y < outData.height; y++) {
for (int x = 0; x < outData.width; x++) {
// Note: we can compare pixels as integers since we just
// asserted both images have the same color image type except
// for the content of the alpha channel.
int actual = awtImage.getRGB(x, y);
assertEquals(awtAlphaMask, actual & awtAlphaMask);
assertEquals(awtAlphaMask | inImage.getRGB(x, y), awtImage.getRGB(x, y));
}
}
}
public void testImageConvertGlobalAlpha() throws Exception {
BufferedImage inImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = inImage.getGraphics();
g.setColor(new Color(0xAA112233, true));
g.fillRect(0, 0, inImage.getWidth(), inImage.getHeight());
g.dispose();
Shell shell = new Shell();
Display display = shell.getDisplay();
Image outImage = SwtUtils.convertToSwt(display, inImage, false, 128);
assertNotNull(outImage);
ImageData outData = outImage.getImageData();
assertEquals(inImage.getWidth(), outData.width);
assertEquals(inImage.getHeight(), outData.height);
assertEquals(128, outData.alpha);
assertEquals(SWT.TRANSPARENCY_NONE, outData.getTransparencyType());
assertNull(outData.alphaData);
PaletteData inPalette = SwtUtils.getAwtPaletteData(inImage.getType());
PaletteData outPalette = outData.palette;
for (int y = 0; y < outData.height; y++) {
for (int x = 0; x < outData.width; x++) {
RGB expected = inPalette.getRGB( inImage.getRGB( x, y));
RGB actual = outPalette.getRGB(outData.getPixel(x, y));
assertEquals(expected, actual);
}
}
}
public void testImageConvertAlpha() throws Exception {
BufferedImage inImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = inImage.getGraphics();
g.setColor(new Color(0xAA112233, true));
g.fillRect(0, 0, inImage.getWidth(), inImage.getHeight());
g.dispose();
Shell shell = new Shell();
Display display = shell.getDisplay();
Image outImage = SwtUtils.convertToSwt(display, inImage, true, -1);
assertNotNull(outImage);
ImageData outData = outImage.getImageData();
assertEquals(inImage.getWidth(), outData.width);
assertEquals(inImage.getHeight(), outData.height);
assertEquals(SWT.TRANSPARENCY_ALPHA, outData.getTransparencyType());
PaletteData inPalette = SwtUtils.getAwtPaletteData(inImage.getType());
PaletteData outPalette = outData.palette;
for (int y = 0; y < outData.height; y++) {
for (int x = 0; x < outData.width; x++) {
RGB expected = inPalette.getRGB( inImage.getRGB( x, y));
RGB actual = outPalette.getRGB(outData.getPixel(x, y));
assertEquals(expected, actual);
// Note: >> instead of >>> since we will compare with byte (a signed number)
int expectedAlpha = inImage.getRGB(x, y) >> 24;
int actualAlpha = outData.alphaData[y * outData.width + x];
assertEquals(expectedAlpha, actualAlpha);
}
}
}
public void testImageConvertAlphaMultiplied() throws Exception {
BufferedImage inImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = inImage.getGraphics();
g.setColor(new Color(0xAA112233, true));
g.fillRect(0, 0, inImage.getWidth(), inImage.getHeight());
g.dispose();
Shell shell = new Shell();
Display display = shell.getDisplay();
Image outImage = SwtUtils.convertToSwt(display, inImage, true, 32);
assertNotNull(outImage);
// Expected alpha is 0xAA from the AWT input image pre-multiplied by 32 in convertToSwt.
int expectedAlpha = (0xAA * 32) >> 8;
ImageData outData = outImage.getImageData();
assertEquals(inImage.getWidth(), outData.width);
assertEquals(inImage.getHeight(), outData.height);
assertEquals(SWT.TRANSPARENCY_ALPHA, outData.getTransparencyType());
PaletteData inPalette = SwtUtils.getAwtPaletteData(inImage.getType());
PaletteData outPalette = outData.palette;
for (int y = 0; y < outData.height; y++) {
for (int x = 0; x < outData.width; x++) {
RGB expected = inPalette.getRGB( inImage.getRGB( x, y));
RGB actual = outPalette.getRGB(outData.getPixel(x, y));
assertEquals(expected, actual);
byte actualAlpha = outData.alphaData[y * outData.width + x];
assertEquals(expectedAlpha, actualAlpha);
}
}
}
public final void testSetRectangle() {
Rect r = new Rect(1, 2, 3, 4);
Rectangle r2 = new Rectangle(3, 4, 20, 30);
SwtUtils.set(r, r2);
assertEquals(3, r.x);
assertEquals(4, r.y);
assertEquals(20, r.w);
assertEquals(30, r.h);
}
public final void testRectRectangle() {
Rectangle r = new Rectangle(3, 4, 20, 30);
Rect r2 = SwtUtils.toRect(r);
assertEquals(3, r2.x);
assertEquals(4, r2.y);
assertEquals(20, r2.w);
assertEquals(30, r2.h);
}
public final void testCropEmpty() {
Image image = createSampleImage(256, 256);
Image result = SwtUtils.drawRectangles(image, Collections.<Rectangle> emptyList(), null,
1.0, (byte) 121);
assertNull(result);
}
public final void testCrop1() {
Image image = createSampleImage(256, 256);
byte alpha = 121;
double scale = 1.0;
List<Rectangle> items = new ArrayList<Rectangle>();
items.add(new Rectangle(30, 60, 20, 20));
Image result =
SwtUtils.drawRectangles(image, items, ImageUtils.getBoundingRectangle(items),
scale, alpha);
assertNotNull(result);
ImageData data = result.getImageData();
byte[] alphaData = data.alphaData;
assertNotNull(alphaData);
assertEquals(20, data.width);
assertEquals(20, data.height);
for (int y = 0; y < 20; y++) {
for (int x = 0; x < 20; x++) {
int r = y + 60;
int g = x + 30;
int expected = r << 16 | g << 8;
assertEquals(expected, data.getPixel(x, y));
assertEquals(alpha, alphaData[y*20+x]);
}
}
}
public final void testCrop2() {
Image image = createSampleImage(256, 256);
byte alpha = 121;
double scale = 1.0;
List<Rectangle> items = new ArrayList<Rectangle>();
items.add(new Rectangle(10, 10, 20, 20));
items.add(new Rectangle(110, 80, 20, 20));
Image result =
SwtUtils.drawRectangles(image, items, ImageUtils.getBoundingRectangle(items),
scale, alpha);
assertNotNull(result);
ImageData data = result.getImageData();
byte[] alphaData = data.alphaData;
assertNotNull(alphaData);
assertEquals(120, data.width);
assertEquals(90, data.height);
for (int y = 0; y < 20; y++) {
for (int x = 0; x < 20; x++) {
int r = y + 10;
int g = x + 10;
int expected = r << 16 | g << 8;
assertEquals(expected, data.getPixel(x, y));
assertEquals(alpha, alphaData[y*120+x]);
}
}
for (int y = 70; y < 90; y++) {
for (int x = 100; x < 120; x++) {
int r = y + 10;
int g = x + 10;
int expected = r << 16 | g << 8;
assertEquals(expected, data.getPixel(x, y));
assertEquals(alpha, alphaData[y*120+x]);
}
}
assertEquals(0, alphaData[40]);
}
/**
* Crop test utility: Create a sample image patterned with red=y and green=x, suitable
* for checking that in image copying operations we've copied and scaled the right
* bits. (Obviously the red/green will be mod'ed with 256).
*
* @param imageWidth the width of the target image
* @param imageHeight the height of the target image
* @return a new image with a red/green pattern
*/
private Image createSampleImage(int imageWidth, int imageHeight) {
Shell shell = new Shell();
Display display = shell.getDisplay();
ImageData data = new ImageData(imageWidth, imageHeight, 32, new PaletteData(0x00FF0000,
0x0000FF00, 0x000000FF));
for (int y = 0; y < imageHeight; y++) {
for (int x = 0; x < imageWidth; x++) {
int pixelValue = (y & 0xFF) << 16 | (x & 0xFF) << 8;
data.setPixel(x, y, pixelValue);
}
}
Image image = new Image(display, data);
return image;
}
}