/**
* Finds the maximum area axis-aligned rectangle contained inside the transformed image which does
* not include any pixels outside the sources border. Assumes that the coordinates are not flipped
* and some other stuff too.
*
* @param srcWidth Width of the source image
* @param srcHeight Height of the source image
* @param transform Transform being applied to the image
* @return Bounding box
*/
public static Rectangle2D_F32 boundBoxInside(
int srcWidth, int srcHeight, PixelTransform_F32 transform) {
float x0, y0, x1, y1;
transform.compute(0, 0);
x0 = transform.distX;
y0 = transform.distY;
transform.compute(srcWidth, 0);
x1 = transform.distX;
transform.compute(0, srcHeight);
y1 = transform.distY;
for (int x = 0; x < srcWidth; x++) {
transform.compute(x, 0);
if (transform.distY > y0) y0 = transform.distY;
transform.compute(x, srcHeight);
if (transform.distY < y1) y1 = transform.distY;
}
for (int y = 0; y < srcHeight; y++) {
transform.compute(0, y);
if (transform.distX > x0) x0 = transform.distX;
transform.compute(srcWidth, y);
if (transform.distX < x1) x1 = transform.distX;
}
return new Rectangle2D_F32(x0, y0, x1 - x0, y1 - y0);
}
@Override
public float unsafe_getF(int x, int y) {
transform.compute(x, y);
return interpolate.get(transform.distX, transform.distY);
}
@Override
public Number get(int x, int y) {
transform.compute(x, y);
return interpolate.get(transform.distX, transform.distY);
}