示例#1
0
  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;
  }
示例#2
0
 @Override
 protected void resizeEvent(QResizeEvent event) {
   if (width() > image.width() || height() > image.height()) {
     int newWidth = Math.max(width() + 128, image.width());
     int newHeight = Math.max(height() + 128, image.height());
     image = resizeImage(image, new QSize(newWidth, newHeight));
     update();
   }
   super.resizeEvent(event);
 }
示例#3
0
  public SmokeEffect(int width, int height) {
    m_width = width;
    m_height = height;

    m_seeds = new int[16000];
    for (int i = 0; i < m_seeds.length; ++i) {
      double d = Math.random();
      m_seeds[i] = (int) (d * 255);
    }
    m_image = new QImage(width, height, QImage.Format.Format_ARGB32_Premultiplied);
    m_image.fill(0);

    m_data = new int[m_width * (m_height + 1)];
    seedLastRow();
  }