private static QImage warpImage(QImage src, int warp, int sign) {
int w = src.width();
int ppl = src.bytesPerLine() / 4;
int srch = src.height();
int desth = srch + warp;
QImage dest = new QImage(w, desth, QImage.Format.Format_ARGB32_Premultiplied);
dest.fill(0);
QNativePointer sbits = src.bits();
QNativePointer dbits = dest.bits();
sbits.setVerificationEnabled(false);
dbits.setVerificationEnabled(false);
double r = w / 2.0;
int extra_offset = sign >= 0 ? 0 : warp;
for (int x = 0; x < w; ++x) {
int oset = (int) (((Math.sqrt(Math.abs(r * r - (x - r) * (x - r)))) * sign / r) * warp);
for (int y = 0; y < srch; ++y) {
int p = sbits.intAt(y * ppl + x);
dbits.setIntAt(((y + oset + extra_offset) * ppl) + x, p);
}
}
return dest;
}
public void next() {
// blur
for (int y = 1; y < m_height; ++y) {
int oset = y * m_width;
// System.out.println("y:::");
for (int x = 1; x < m_width - 1; ++x) {
// int dl = m_data[oset + m_width + x - 1];
// int dr = m_data[oset + m_width + x + 1];
// int d = m_data[oset + m_width + x];
// m_data[oset + x] = (int) ((dl + (d * 2) + dr) / (4 + 10.0 / m_width));
// m_data[oset + x] = (int) ((dl + du + dr + dd) / 4);
m_data[oset + x] =
(((m_data[oset + x + m_width] << 2)
+ (m_data[oset + x] << 1)
+ (m_data[oset + x + 1])
+ (m_data[oset + x - 1]))
- 7)
>> 3;
if (m_data[oset + x] < 0) m_data[oset + x] = 0;
// System.out.print(" " + m_data[oset + x]);
}
// System.out.println();
}
// seed the last row for the next step...
seedLastRow();
QNativePointer np = m_image.bits();
np.setVerificationEnabled(false);
int ppl = m_image.bytesPerLine() / 4;
for (int y = 0; y < m_height; ++y) {
int oset = ppl * y;
for (int x = 0; x < m_width; ++x) {
int val = m_data[oset + x];
val = val * val / (255);
int val_2 = 0;
np.setIntAt(oset + x, (val << 24) | (val_2 << 16) | (val_2 << 8) | (val_2));
}
}
}