public QImage resizeImage(QImage image, QSize newSize) {
if (image.size() == newSize) return image;
QImage newImage = new QImage(newSize, QImage.Format.Format_RGB32);
newImage.fill(new QColor(Qt.GlobalColor.white).rgb());
QPainter painter = new QPainter(newImage);
painter.drawImage(new QPoint(0, 0), image);
painter.end();
return newImage;
}
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 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();
}
private static QImage composeCup(QImage bg_image, QImage fg_image, int size, int warp) {
double coffey_alpha = 1;
QColor dark_brown = QColor.fromRgbF(0.3, 0.15, 0, coffey_alpha);
QColor light_brown = QColor.fromRgbF(0.66, 0.33, 0, coffey_alpha);
QColor highlight = QColor.fromRgbF(1, 1, 0.8, coffey_alpha);
QColor transparent = QColor.transparent;
double highlight_pos = 0.4;
double highlight_size = 0.05;
QImage combined =
new QImage(
size + size / 2, size + warp * 2 + size / 8, QImage.Format.Format_ARGB32_Premultiplied);
combined.fill(0);
QPainter p = new QPainter();
p.begin(combined);
p.setRenderHint(QPainter.RenderHint.Antialiasing);
p.setPen(Qt.PenStyle.NoPen);
// draw the background
p.drawImage(0, 0, bg_image);
// Draw the coffey
QRectF coffey_bounds = new QRectF(0, warp, size, 2 * warp);
QConicalGradient cg =
new QConicalGradient(
coffey_bounds.width() * GOLDEN_MEAN + warp * 0.1,
warp * 1.2 + coffey_bounds.height() / 2.0,
-30);
cg.setColorAt(0, dark_brown);
cg.setColorAt(highlight_pos - highlight_size, light_brown);
cg.setColorAt(0.4, highlight);
cg.setColorAt(highlight_pos + highlight_size, light_brown);
cg.setColorAt(1, dark_brown);
p.setPen(new QPen(new QBrush(QColor.black), size * 0.01));
p.setBrush(new QBrush(cg));
p.drawEllipse(coffey_bounds);
// draw the foreground
p.drawImage(0, warp, fg_image);
// Draw the handle
double handle_dim = size * 0.8;
QRectF handle_bounds = new QRectF(size - handle_dim / 2, size / 3, handle_dim, handle_dim);
double hcx = handle_bounds.width() / 2;
double hcy = handle_bounds.height() / 2;
QImage handle_im =
new QImage(handle_bounds.size().toSize(), QImage.Format.Format_ARGB32_Premultiplied);
{
handle_im.fill(0);
QPainter ph = new QPainter();
ph.begin(handle_im);
QRadialGradient rg = new QRadialGradient(hcx, hcy, hcx, hcx, hcy + size / 30);
double ir = 0.5;
double or = 0.9;
double aa = 0.02;
double shade = 0.08;
rg.setColorAt(ir - aa, transparent);
rg.setColorAt(ir, QColor.fromRgbF(0, 0, 0, 1));
rg.setColorAt(ir + shade, color_green);
rg.setColorAt((ir + or) / 2, QColor.fromRgbF(0.8, 0.85, 0.6));
rg.setColorAt(or - shade, color_green);
rg.setColorAt(or, QColor.fromRgbF(0, 0, 0, 1));
rg.setColorAt(or + aa, transparent);
ph.setBrush(new QBrush(rg));
ph.setPen(Qt.PenStyle.NoPen);
ph.drawEllipse(0, 0, (int) handle_bounds.width(), (int) handle_bounds.height());
QLinearGradient lg = new QLinearGradient(0, 0, handle_bounds.width(), 0);
lg.setColorAt(0.42, transparent);
lg.setColorAt(0.47, QColor.fromRgbF(0, 0, 0));
ph.setBrush(new QBrush(lg));
ph.setCompositionMode(QPainter.CompositionMode.CompositionMode_DestinationIn);
ph.drawRect(0, 0, (int) handle_bounds.width(), (int) handle_bounds.height());
ph.end();
}
p.drawImage(handle_bounds.topLeft(), handle_im);
// The drop shadow...
QRadialGradient dsg = new QRadialGradient(0, 0, 0.5, 0, 0);
dsg.setColorAt(0, QColor.fromRgbF(0, 0, 0, .75));
dsg.setColorAt(1, transparent);
p.translate(size * 3 / 4, size + warp * 1.4);
p.scale(size * 1.5, size / 2);
p.setBrush(new QBrush(dsg));
p.setPen(Qt.PenStyle.NoPen);
p.setCompositionMode(QPainter.CompositionMode.CompositionMode_DestinationOver);
p.drawEllipse(new QRectF(-0.5, -0.5, 1, 1));
// p.drawEllipse(new QRectF(size - size / 2, size + warp - size / 2, size, size));
p.end();
return combined;
}
public void clearImage() {
image.fill(new QColor(Qt.GlobalColor.white).rgb());
modified = true;
update();
}