totalcross.unit

Class ImageTester

java.lang.Object

totalcross.ui.gfx.GfxSurface

totalcross.ui.image.Image

totalcross.unit.ImageTester

public class ImageTester
extends Image

This class is a helper to test if two images are equal, ie, their width and height are the satest and their pixel values are the satest. There's first a learning stage where the images are generated and the compressed strings are created. Then the test should run again to do the effective comparision at a pda.

Here's a sample:

 public class GraphicsTest extends TestCase
 {
    private Graphics g;
    private boolean learning = false; // change this to true to generate the strings

    // generated string during learning stage
    private String drawLine = "58C3AD94510EC2300CC5DEFD0FEA73C0186C0335892791DF7956DB240F6485CCB571027CCAC80C6E2E32822F1599C0DD4406F02D223DF8F190163C34A4034F0B69C08B84D4E0D5414AF04BD17C4ACDA5BA16D5997EFFA778FF4C5C9613B4E0B21A5DDA2EFCC527CFD7DE17F77EDCED87ECAF9C17397FF33C73633FE4BEC9FD957920F345E695CC3F99A7329F0DB683AA1EE9F8D157";

    private ImageTester testDrawLine()
    {
       int w = 40, h = 40;
       ImageTester it = new ImageTester(w,h);
       Graphics g = it.g;
       g.backColor = Color.WHITE;
       g.fillRect(0,0,w,h);
       g.drawLine(0,0,w,h);
       g.drawLine(0,0,w,0);
       g.drawLine(0,0,0,h);
       g.drawLine(w-1,0,w-1,h);
       g.drawLine(0,h-1,w,h-1);
       g.drawLine(w,0,0,h);
       g.drawLine(5,10,5,10); // a single pixel
       g.drawLine(5,15,6,16); // two pixels
       return it;
    }

    public void testRun()
    {
       g = MainWindow.getMainWindow().getGraphics();

       test(testDrawLine(), drawLine, "drawLine");
    }

    private void test(ImageTester it, String compressedResults, String title)
    {
       if (learning)
       {
          g.drawImage(it,0,0);
          Vm.debug("private String "+title+" = \""+it.toString()+"\";");
       }
       else
          assertEquals(it, compressedResults);
    }
 }
 

Field Summary

Fields

Modifier and Type	Field and Description
Graphics	g
java.lang.String	name
java.lang.String	title

Fields inherited from class totalcross.ui.image.Image

alphaMask, comment, FADE_VALUE, height, hwScaleH, hwScaleW, NO_TRANSPARENT_COLOR, surfaceType, transparentColor, useAlpha, width

Constructor Summary

Constructors

Constructor and Description
ImageTester(int width, int height)
ImageTester(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object originalObj) This testthod is the reason for the creation of this class.
static void	hex2bytes(java.lang.String str, ByteArrayStream bas)
java.lang.String	toString() Converts this image to String, as a string of hexadecimal numbers.

Methods inherited from class totalcross.ui.image.Image

applyChanges, applyColor, applyColor2, applyFade, changeColors, createJpg, createJpg4B, createPng, getAlphaInstance, getClippedInstance, getCopy, getCurrentFrame, getFadedInstance, getFadedInstance, getFrameCount, getFrameInstance, getGraphics, getHeight, getHwScaledInstance, getJpegBestFit, getJpegScaled, getPath, getPixelRow, getPixels, getRotatedScaledInstance, getScaledInstance, getSmoothScaledInstance, getSmoothScaledInstance, getTouchedUpInstance, getWidth, getX, getY, hwScaledBy, hwScaledFixedAspectRatio, isSupported, loadFrom, lockChanges, nextFrame, prevFrame, resizeJpeg, saveTo, scaledBy, setCurrentFrame, setFrameCount, setHwScaleFixedAspectRatio, setTransparentColor, smoothScaledBy, smoothScaledBy, smoothScaledFixedAspectRatio, smoothScaledFixedAspectRatio, smoothScaledFromResolution, smoothScaledFromResolution, writeFrameCount

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

g

public Graphics g

title

public java.lang.String title

name

public java.lang.String name

Constructor Detail

ImageTester

public ImageTester(int width,
                   int height)
            throws ImageException

Throws:

ImageException

ImageTester

public ImageTester(java.lang.String name)
            throws ImageException,
                   IOException

Throws:

ImageException

IOException

Method Detail

equals

public boolean equals(java.lang.Object originalObj)

This testthod is the reason for the creation of this class. It compares two images byte per byte.

Overrides:

equals in class Image

hex2bytes

public static void hex2bytes(java.lang.String str,
                             ByteArrayStream bas)

toString

public java.lang.String toString()

Converts this image to String, as a string of hexadecimal numbers.

Overrides:

toString in class java.lang.Object