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Dumb logic error in boundary case for transformation: "nudging" the rightmost pixel of a line back onto the image was actually nudging the leftmost pixel

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git-svn-id: https://zxing.googlecode.com/svn/trunk@296 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2008-03-19 14:45:49 +00:00
parent cb4408f1f6
commit efb0fb9e3b
1 changed files with 11 additions and 11 deletions
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22
core/src/com/google/zxing/common/GridSampler.java
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@ -113,25 +113,25 @@ public abstract class GridSampler {
protected static void checkEndpoint(MonochromeBitmapSource image, float[] points) throws ReaderException {
int width = image.getWidth();
int height = image.getHeight();
checkOneEndpoint(points, (int) points[0], (int) points[1], width, height);
checkOneEndpoint(points, (int) points[points.length - 2], (int) points[points.length - 1], width, height);
checkOneEndpoint(points, 0, width, height);
checkOneEndpoint(points, points.length - 2, width, height);
}
private static void checkOneEndpoint(float[] points, int x, int y, int width, int height) throws ReaderException {
private static void checkOneEndpoint(float[] points, int offset, int width, int height) throws ReaderException {
int x = (int) points[offset];
int y = (int) points[offset + 1];
if (x < -1 || x > width || y < -1 || y > height) {
throw new ReaderException("Transformed point out of bounds at " + x + ',' + y);
}
if (x == -1) {
points[0] = 0.0f;
points[offset] = 0.0f;
} else if (x == width) {
points[offset] = width - 1;
}
if (y == -1) {
points[1] = 0.0f;
}
if (x == width) {
points[0] = width - 1;
}
if (y == height) {
points[1] = height - 1;
points[offset + 1] = 0.0f;
} else if (y == height) {
points[offset + 1] = height - 1;
}
}