void TransferFunctionEditor::setColorMapStops( const QGradientStops& stops )
{
QPolygonF redPoints, greenPoints, bluePoints, alphaPoints;
const double redCMHt = _redWidget->height();
const double greenCMHt = _greenWidget->height();
const double blueCMHt = _blueWidget->height();
const double alphaCMHt = _alphaWidget->height();
for( int32_t i = 0; i < stops.size(); ++i )
{
double position = stops.at( i ).first;
QRgb color = stops.at( i ).second.rgba();
redPoints << QPointF( position * _redWidget->width(),
redCMHt - qRed(color) * redCMHt / 255 );
greenPoints << QPointF( position * _greenWidget->width(),
greenCMHt - qGreen(color) * greenCMHt / 255 );
bluePoints << QPointF( position * _blueWidget->width(),
blueCMHt - qBlue(color) * blueCMHt / 255 );
alphaPoints << QPointF( position * _alphaWidget->width(),
alphaCMHt - qAlpha(color) * alphaCMHt / 255 );
}
_redWidget->setPoints( redPoints );
_greenWidget->setPoints( greenPoints );
_blueWidget->setPoints( bluePoints );
_alphaWidget->setPoints( alphaPoints );
}
void ColorMapWidget::setGradientStops( const QGradientStops& stops )
{
if( _channel != lexis::render::ColorMap::Channel::alpha )
return;
_gradient = QLinearGradient( 0.0f, 0.0f, width(), 0.0f );
for( int i = 0; i < stops.size(); ++i )
_gradient.setColorAt( stops.at( i ).first, stops.at( i ).second );
_background = QImage();
_generateBackground();
}
void ShadeWidget::setGradientStops(const QGradientStops &stops)
{
if (m_shade_type == ARGBShade) {
m_alpha_gradient = QLinearGradient(0, 0, width(), 0);
for (int i=0; i<stops.size(); ++i) {
QColor c = stops.at(i).second;
m_alpha_gradient.setColorAt(stops.at(i).first, QColor(c.red(), c.green(), c.blue()));
}
m_shade = QImage();
generateShade();
update();
}
}
void saveGradientStops(QTextStream &str, const QGradient *g) {
QGradientStops stops = g->stops();
if (g->interpolationMode() == QGradient::ColorInterpolation) {
bool constantAlpha = true;
int alpha = stops.at(0).second.alpha();
for (int i = 1; i < stops.size(); ++i)
constantAlpha &= (stops.at(i).second.alpha() == alpha);
if (!constantAlpha) {
const qreal spacing = qreal(0.02);
QGradientStops newStops;
QRgb fromColor = PREMUL(stops.at(0).second.rgba());
QRgb toColor;
for (int i = 0; i + 1 < stops.size(); ++i) {
int parts = qCeil((stops.at(i + 1).first - stops.at(i).first) / spacing);
newStops.append(stops.at(i));
toColor = PREMUL(stops.at(i + 1).second.rgba());
if (parts > 1) {
qreal step = (stops.at(i + 1).first - stops.at(i).first) / parts;
for (int j = 1; j < parts; ++j) {
QRgb color = INV_PREMUL(INTERPOLATE_PIXEL_256(fromColor, 256 - 256 * j / parts, toColor, 256 * j / parts));
newStops.append(QGradientStop(stops.at(i).first + j * step, QColor::fromRgba(color)));
}
}
fromColor = toColor;
}
newStops.append(stops.back());
stops = newStops;
}
}
foreach(QGradientStop stop, stops) {
QString color =
QString::fromLatin1("#%1%2%3")
.arg(stop.second.red(), 2, 16, QLatin1Char('0'))
.arg(stop.second.green(), 2, 16, QLatin1Char('0'))
.arg(stop.second.blue(), 2, 16, QLatin1Char('0'));
str << QLatin1String(" <stop offset=\"")<< stop.first << QLatin1String("\" ")
<< QLatin1String("stop-color=\"") << color << QLatin1String("\" ")
<< QLatin1String("stop-opacity=\"") << stop.second.alphaF() <<QLatin1String("\" />\n");
}
QGradientStops QQuickGradient::gradientStops() const
{
QGradientStops stops;
for (int i = 0; i < m_stops.size(); ++i){
int j = 0;
while (j < stops.size() && stops.at(j).first < m_stops[i]->position())
j++;
stops.insert(j, QGradientStop(m_stops.at(i)->position(), m_stops.at(i)->color()));
}
return stops;
}
void GradientEditor::setGradientStops(const QGradientStops &stops)
{
QPolygonF pts_red, pts_green, pts_blue, pts_alpha;
qreal h_red = m_red_shade->height();
qreal h_green = m_green_shade->height();
qreal h_blue = m_blue_shade->height();
qreal h_alpha = m_alpha_shade->height();
for (int i=0; i<stops.size(); ++i) {
qreal pos = stops.at(i).first;
QRgb color = stops.at(i).second.rgba();
pts_red << QPointF(pos * m_red_shade->width(), h_red - qRed(color) * h_red / 255);
pts_green << QPointF(pos * m_green_shade->width(), h_green - qGreen(color) * h_green / 255);
pts_blue << QPointF(pos * m_blue_shade->width(), h_blue - qBlue(color) * h_blue / 255);
pts_alpha << QPointF(pos * m_alpha_shade->width(), h_alpha - qAlpha(color) * h_alpha / 255);
}
set_shade_points(pts_red, m_red_shade);
set_shade_points(pts_green, m_green_shade);
set_shade_points(pts_blue, m_blue_shade);
set_shade_points(pts_alpha, m_alpha_shade);
}
QSGNode *QQuickRectangle::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *data)
{
Q_UNUSED(data);
Q_D(QQuickRectangle);
if (width() <= 0 || height() <= 0
|| (d->color.alpha() == 0 && (!d->pen || d->pen->width() == 0 || d->pen->color().alpha() == 0))) {
delete oldNode;
return 0;
}
QSGRectangleNode *rectangle = static_cast<QSGRectangleNode *>(oldNode);
if (!rectangle) rectangle = d->sceneGraphContext()->createRectangleNode();
rectangle->setRect(QRectF(0, 0, width(), height()));
rectangle->setColor(d->color);
if (d->pen && d->pen->isValid()) {
rectangle->setPenColor(d->pen->color());
rectangle->setPenWidth(d->pen->width());
rectangle->setAligned(d->pen->pixelAligned());
} else {
rectangle->setPenWidth(0);
}
rectangle->setRadius(d->radius);
rectangle->setAntialiasing(d->antialiasing);
QGradientStops stops;
if (d->gradient) {
QList<QQuickGradientStop *> qxstops = d->gradient->m_stops;
for (int i = 0; i < qxstops.size(); ++i){
int j = 0;
while (j < stops.size() && stops.at(j).first < qxstops[i]->position())
j++;
stops.insert(j, QGradientStop(qxstops.at(i)->position(), qxstops.at(i)->color()));
}
}
rectangle->setGradientStops(stops);
rectangle->update();
return rectangle;
}
int QPdfEnginePrivate::gradientBrush(const QBrush &b, const QMatrix &matrix, int *gStateObject)
{
const QGradient *gradient = b.gradient();
if (!gradient)
return 0;
QTransform inv = matrix.inverted();
QPointF page_rect[4] = { inv.map(QPointF(0, 0)),
inv.map(QPointF(width_, 0)),
inv.map(QPointF(0, height_)),
inv.map(QPointF(width_, height_)) };
bool opaque = b.isOpaque();
QByteArray shader;
QByteArray alphaShader;
if (gradient->type() == QGradient::LinearGradient) {
const QLinearGradient *lg = static_cast<const QLinearGradient *>(gradient);
shader = QPdf::generateLinearGradientShader(lg, page_rect);
if (!opaque)
alphaShader = QPdf::generateLinearGradientShader(lg, page_rect, true);
} else {
// #############
return 0;
}
int shaderObject = addXrefEntry(-1);
write(shader);
QByteArray str;
QPdf::ByteStream s(&str);
s << "<<\n"
"/Type /Pattern\n"
"/PatternType 2\n"
"/Shading " << shaderObject << "0 R\n"
"/Matrix ["
<< matrix.m11()
<< matrix.m12()
<< matrix.m21()
<< matrix.m22()
<< matrix.dx()
<< matrix.dy() << "]\n";
s << ">>\n"
"endobj\n";
int patternObj = addXrefEntry(-1);
write(str);
currentPage->patterns.append(patternObj);
if (!opaque) {
bool ca = true;
QGradientStops stops = gradient->stops();
int a = stops.at(0).second.alpha();
for (int i = 1; i < stops.size(); ++i) {
if (stops.at(i).second.alpha() != a) {
ca = false;
break;
}
}
if (ca) {
*gStateObject = addConstantAlphaObject(stops.at(0).second.alpha());
} else {
int alphaShaderObject = addXrefEntry(-1);
write(alphaShader);
QByteArray content;
QPdf::ByteStream c(&content);
c << "/Shader" << alphaShaderObject << "sh\n";
QByteArray form;
QPdf::ByteStream f(&form);
f << "<<\n"
"/Type /XObject\n"
"/Subtype /Form\n"
"/BBox [0 0 " << width_ << height_ << "]\n"
"/Group <</S /Transparency >>\n"
"/Resources <<\n"
"/Shading << /Shader" << alphaShaderObject << alphaShaderObject << "0 R >>\n"
">>\n";
f << "/Length " << content.length() << "\n"
">>\n"
"stream\n"
<< content
<< "endstream\n"
"endobj\n";
int softMaskFormObject = addXrefEntry(-1);
write(form);
*gStateObject = addXrefEntry(-1);
xprintf("<< /SMask << /S /Alpha /G %d 0 R >> >>\n"
"endobj\n", softMaskFormObject);
currentPage->graphicStates.append(*gStateObject);
}
}
return patternObj;
}
