TestGraphicsClippingpublic class TestGraphicsClipping extends TestCase
| Fields Summary |
|---|
| static final int | BACKGROUND_COLOR | | int | width | | int | height | | int | backgroundColor |
| Methods Summary |
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| void | draw(Graphics g)
g.setColor(0);
g.fillRect(0, 0, width, height);
| | public void | runTests()
declare("testOne");
testOne();
| | void | testOne()
int[] unclippedData = new int[width*height];
int[] clippedData = new int[width*height];
Image image = Image.createImage(width, height);
Graphics g = image.getGraphics();
backgroundColor = g.getDisplayColor(BACKGROUND_COLOR);
for (int cx = 1; cx < width; cx++) {
for (int cy = 1; cy < height; cy++) {
for (int cw = 1; cw < width-cx; cw++) {
for (int ch = 1; ch < height-cy; ch++) {
g.setClip(0, 0, width, height);
g.setColor(backgroundColor);
g.fillRect(0, 0, width, height);
draw(g);
image.getRGB(unclippedData, 0, width, 0, 0, width, height);
g.setColor(backgroundColor);
g.fillRect(0, 0, width, height);
g.setClip(cx, cy, cw, ch);
draw(g);
image.getRGB(clippedData, 0, width, 0, 0, width, height);
boolean result = verifyClip(unclippedData, clippedData, cx, cy, cw, ch);
assertTrue(result);
}
}
}
}
| | boolean | verifyClip(int[] unclippedData, int[] clippedData, int cx, int cy, int cw, int ch)
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int index = y*width + x;
if (y >= cy && y < cy+ch && x >= cx && x < cx + cw) {
/* should match unclipped version when alpha is ignored */
if ((clippedData[index]) != (unclippedData[index])) {
System.out.println("FAILURE: inside clip (" + x + "," + y + ")" +
" clipped=" +
Integer.toHexString(clippedData[index]) +
" unclipped=" +
Integer.toHexString(unclippedData[index]));
return false;
}
} else {
/* should be background color when alpha is ignored */
if ((clippedData[index]&0x00ffffff) != (backgroundColor&0xffffff)) {
System.out.println("FAILURE: outside clip (" + x + "," + y + ")" +
" clipped=" +
Integer.toHexString(clippedData[index]&0xffffff) +
" backgroundColor=" +
Integer.toHexString(backgroundColor&0xffffff));
return false;
}
}
}
}
return true;
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