C++ QColor::setRed方法代码示例

void AdaptAver::adArAv(int curx, int cury, int powerX, int powerY)
{ //Adaptive Arithmetic Average
    //qDebug() << "adarav";
    QList<int> proxArrayR; //массивы пикселей окрестности точки
    QList<int> proxArrayG; //для трёх цветов (red, green, blue)
    QList<int> proxArrayB;
    for (int y = cury - powerY; y <= cury+ powerY; y++)
        for (int x = curx - powerX; x <= curx+ powerX; x++)
        {//проверяем окрестные пиксели
            if ((0 <= x && x <= image.width()-1) && (0 <= y && y <= image.height()-1))
            { //записываем значения
                QColor pixel = image.pixel(x, y);
                proxArrayR.append(pixel.red());
                proxArrayG.append(pixel.green());
                proxArrayB.append(pixel.blue());
            }
            else { //если мы за пределами картинки - записываем чёрный цвет
                proxArrayR.append(0);
                proxArrayG.append(0);
                proxArrayB.append(0);
            }
        }


    QColor pixel = image.pixel(curx, cury);//(QColor(0, 0, 0, 255)); //makin a pixel

    int aveRed = listAverage(proxArrayR); //устанавливаем значение его цветов равным
    int aveGreen = listAverage(proxArrayG);//среднему арифметическому массива ближайших пикселей
    int aveBlue = listAverage(proxArrayB);

    double dispRed = listDisp(proxArrayR, aveRed); //считаем дисперсии значений этих массивов
    double dispGreen = listDisp(proxArrayG, aveGreen);
    double dispBlue = listDisp(proxArrayB, aveBlue);


    if (dispNoise > dispRed) //если значение дисперсии шума выше, чем дисперсия массива окрестности
        pixel.setRed(aveRed); //фильтр работает как фильтр арифметического среднего
    if (dispNoise <= dispRed) //иначе значение задается по формуле z' = z - (Dшум/Dz)*(z - u), u - локальное среднее яркости пикселей
        pixel.setRed(pixel.red()- (dispNoise/dispRed)*(pixel.red()-aveRed));

    if (dispNoise > dispGreen)
        pixel.setGreen(aveGreen);
    if (dispNoise <= dispGreen)
        pixel.setGreen(pixel.green()- (dispNoise/dispGreen)*(pixel.green()-aveGreen));

    if (dispNoise > dispBlue)
        pixel.setBlue(aveBlue);
    if (dispNoise <= dispBlue)
        pixel.setBlue(pixel.blue()- (dispNoise/dispBlue)*(pixel.blue()-aveBlue));

    if ((0 <= curx && curx <= image.width()-1) && (0 <= cury && cury <= image.height()-1))
        result.setPixel(curx, cury, pixel.rgb()); //записываем значение в результат
}

void Widget::SetColor(double cosDifuse,double cosSpecular)
{

    // qDebug() << cosDifuse;
    if (cosDifuse < 0) {cosDifuse = 0;}
    if (cosSpecular < 0) {cosSpecular = 0 ;}

    double red,green,blue;
    red = color_anbient.red()/255.0+
          cosDifuse*color_diffuse.red()/255.0+
  //        pow(cosSpecular*color_specular.red()/255.0,intense);
          cosSpecular*color_specular.red()/255.0;

    color.setRed(max(0,min(red*255,255)));
    green = color_anbient.green()/255.0+
            cosDifuse*color_diffuse.green()/255.0+
           // pow(cosSpecular*color_specular.green()/255.0,intense);
          cosSpecular*color_specular.green()/255.0;

    color.setGreen(max(0,min(green*255,255)));

    blue = color_anbient.blue()/255.0+
            cosDifuse*color_diffuse.blue()/255.0+
  //          pow(cosSpecular*color_specular.blue()/255.0,intense);
          cosSpecular*color_specular.blue()/255.0;

    color.setBlue(max(0,min(blue*255,255)));


}

static QColor red2yellow2green(qreal x)
{
  QColor color;
  x = clamp(x, 0.0, 1.0);
  if (x <= 0.5) {
    x *= 2;
    color.setRed(255);
    color.setGreen(255 * x);
  }
  else {
    x = 2 * x - 1;
    color.setRed(255 - 255 * x);
    color.setGreen(255);
  }
  return color;
}

QColor Viewport::determineColor(const QColor &basecolor,
                                float weight, float totalweight,
                                bool highlighted, bool single)
{
	QColor color = basecolor;
	qreal alpha;
	/* TODO: this is far from optimal yet. challenge is to give a good
	   view where important information is not lost, yet not clutter
	   the view with too much low-weight information */
	/* logarithm is used to prevent single data points to get lost.
	   this should be configurable. */
	alpha = useralpha;
	if (drawLog->isChecked())
		alpha *= (0.01 + 0.99*(std::log(weight+1) / std::log(totalweight)));
	else
		alpha *= (0.01 + 0.99*(weight / totalweight));
	color.setAlphaF(std::min(alpha, 1.)); // cap at 1

	if (highlighted) {
		if (basecolor == Qt::white) {
			color = Qt::yellow;
		} else {
			color.setGreen(std::min(color.green() + 195, 255));
			color.setRed(std::min(color.red() + 195, 255));
			color.setBlue(color.blue()/2);
		}
		color.setAlphaF(1.);
	}

	// recolor singleLabel (and make 100% opaque)
	if (single) {
		color.setRgbF(1., 1., 0., 1.);
	}
	return color;
}

void RedEyeReductionImageOperation::apply(QImage* img, const QRectF& rectF)
{
    const QRect rect = PaintUtils::containingRect(rectF);
    const qreal radius = rectF.width() / 2;
    const qreal centerX = rectF.x() + radius;
    const qreal centerY = rectF.y() + radius;
    const Ramp radiusRamp(qMin(double(radius * 0.7), double(radius - 1)), radius, 1., 0.);

    uchar* line = img->scanLine(rect.top()) + rect.left() * 4;
    for (int y = rect.top(); y < rect.bottom(); ++y, line += img->bytesPerLine()) {
        QRgb* ptr = (QRgb*)line;

        for (int x = rect.left(); x < rect.right(); ++x, ++ptr) {
            const qreal currentRadius = sqrt(pow(y - centerY, 2) + pow(x - centerX, 2));
            qreal alpha = radiusRamp(currentRadius);
            if (qFuzzyCompare(alpha, 0)) {
                continue;
            }

            const QColor src(*ptr);
            alpha *= computeRedEyeAlpha(src);
            int r = src.red();
            int g = src.green();
            int b = src.blue();
            QColor dst;
            // Replace red with green, and blend according to alpha
            dst.setRed(int((1 - alpha) * r + alpha * g));
            dst.setGreen(int((1 - alpha) * g + alpha * g));
            dst.setBlue(int((1 - alpha) * b + alpha * b));
            *ptr = dst.rgba();
        }
    }
}

void QgsColorWidget::alterColor( QColor& color, const QgsColorWidget::ColorComponent component, const int newValue ) const
{
  int h, s, v, a;
  color.getHsv( &h, &s, &v, &a );

  //clip value to sensible range
  int clippedValue = qMin( qMax( 0, newValue ), componentRange( component ) );

  switch ( component )
  {
    case QgsColorWidget::Red:
      color.setRed( clippedValue );
      return;
    case QgsColorWidget::Green:
      color.setGreen( clippedValue );
      return;
    case QgsColorWidget::Blue:
      color.setBlue( clippedValue );
      return;
    case QgsColorWidget::Hue:
      color.setHsv( clippedValue, s, v, a );
      return;
    case QgsColorWidget::Saturation:
      color.setHsv( h, clippedValue, v, a );
      return;
    case QgsColorWidget::Value:
      color.setHsv( h, s, clippedValue, a );
      return;
    case QgsColorWidget::Alpha:
      color.setAlpha( clippedValue );
      return;
    default:
      return;
  }
}

void Renderer::initialize(xqtgl::window*  surface)
{
    m_backgroundColor = QColor::fromRgbF(0.1f, 0.1f, 0.2f, 1.0f);
    m_backgroundColor.setRed(qrand() % 64);
    m_backgroundColor.setGreen(qrand() % 128);
    m_backgroundColor.setBlue(qrand() % 256);
}

void MIPS32SyntaxHighlighter::setBackgroundColor(QColor const &color){
    MIPS32SyntaxHighlighter::backgroundColor = color;
    
    int red = color.red();
    int blue = color.blue();
    int green = color.green();
    int offset = (int)(DEFAULT_COLOR_BACKGROUND_HIGHLIGHT_RATIO * 256.0);
    
    if(offset < 0){
        if(red+offset < 0){red-=offset;}else{red+=offset;}
        if(green+offset < 0){green-=offset;}else{green+=offset;}
        if(blue+offset < 0){blue-=offset;}else{blue+=offset;}
    }else if(offset > 0){
        if(red+offset > 255){red-=offset;}else{red+=offset;}
        if(green+offset > 255){green-=offset;}else{green+=offset;}
        if(blue+offset > 255){blue-=offset;}else{blue+=offset;}
    }else{
        //don't change color
    }
    QColor tmpColor;
    tmpColor.setRed(red);
    tmpColor.setBlue(blue);
    tmpColor.setGreen(green);
    MIPS32SyntaxHighlighter::backgroundHighlightColor = tmpColor;
}

void EyedropperTool::mouseReleaseEvent(QMouseEvent *event)
{
    Layer* layer = mEditor->layers()->currentLayer();
    if (layer == NULL) { return; }

    if (event->button() == Qt::LeftButton)
    {
        if (layer->type() == Layer::BITMAP)
        {
            BitmapImage* targetImage = ((LayerBitmap *)layer)->getLastBitmapImageAtFrame( mEditor->currentFrame(), 0);
            //QColor pickedColour = targetImage->pixel(getLastPoint().x(), getLastPoint().y());
            QColor pickedColour;
            pickedColour.setRgba( targetImage->pixel( getLastPoint().x(), getLastPoint().y() ) );
            int transp = 255 - pickedColour.alpha();
            pickedColour.setRed( pickedColour.red() + transp );
            pickedColour.setGreen( pickedColour.green() + transp );
            pickedColour.setBlue( pickedColour.blue() + transp );
            if (pickedColour.alpha() != 0)
            {
                mEditor->color()->setColor(pickedColour);
            }
        }
        else if (layer->type() == Layer::VECTOR)
        {
            VectorImage *vectorImage = ((LayerVector *)layer)->getLastVectorImageAtFrame(mEditor->currentFrame(), 0);
            int colourNumber = vectorImage->getColourNumber(getLastPoint());
            if (colourNumber != -1)
            {
                mEditor->color()->setColorNumber(colourNumber);
            }
        }
    }
}

QColor ColorMappingGenerator::GetColor(ColorMappingType color_type, float current_value, float min_value, float max_value){
    float value = current_value;
    if ( value < min_value ) value = min_value;
    if ( value > max_value ) value = max_value;

	if ( value < color_index_vec_[color_type][0].value_index ) value = color_index_vec_[color_type][0].value_index;
	if ( value > color_index_vec_[color_type][color_index_vec_[color_type].size() - 1].value_index ) value = color_index_vec_[color_type][color_index_vec_[color_type].size() - 1].value_index;

    int current_index = 0;
    while ( current_index < color_index_vec_[color_type].size() && value > color_index_vec_[color_type][current_index].value_index ) current_index++;
    if ( current_index == 0 )
        return color_index_vec_[color_type][0].color;
    else {
        QColor color;
        if ( is_linear_[color_type] ){
            float scale = (color_index_vec_[color_type][current_index].value_index - value) / (color_index_vec_[color_type][current_index].value_index - color_index_vec_[color_type][current_index - 1].value_index);
            color.setRed(scale * color_index_vec_[color_type][current_index - 1].color.red() + (1.0 - scale) * color_index_vec_[color_type][current_index].color.red());
            color.setGreen(scale * color_index_vec_[color_type][current_index - 1].color.green() + (1.0 - scale) * color_index_vec_[color_type][current_index].color.green());
            color.setBlue(scale * color_index_vec_[color_type][current_index - 1].color.blue() + (1.0 - scale) * color_index_vec_[color_type][current_index].color.blue());
        } else {
            color = color_index_vec_[color_type][current_index - 1].color;
        }

        return color;
    }
}

//render the square on the screen
void Square::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
	QColor color;
	if(selected)
	{
		//if the user clicked it, draw it purple
		color.setBlue(100); color.setRed(100); color.setGreen(0);
	}
	else
	{
		//otherwise draw it white
		color.setBlue(255); color.setRed(255); color.setGreen(255);
	}
	painter->setBrush(color);
	painter->drawRect(xcoor1,ycoor1,xcoor2-xcoor1,ycoor2-ycoor1);
}

QColor KDReports::XmlHelper::readBackground( const QDomElement& element )
{
    QColor ret;
    if ( element.hasAttribute( QLatin1String( "background" ) ) ) {
        const QString name = element.attribute( QLatin1String( "background" ) );
        ret = QColor( name );
    } else if( element.hasAttribute( QLatin1String( "bgred" ) ) &&
        element.hasAttribute( QLatin1String( "bggreen" ) ) &&
        element.hasAttribute( QLatin1String( "bgblue" ) ) ) {
        int red = 0, green = 0, blue = 0;
        bool ok = true;
        red = element.attribute( QLatin1String( "bgred" ) ).toInt( &ok );
        if( ok ) {
            green = element.attribute( QLatin1String( "bggreen" ) ).toInt( &ok );
            if( ok ) {
                blue = element.attribute( QLatin1String( "bgblue" ) ).toInt( &ok );
                if( ok ) {
                    ret.setRed( red );
                    ret.setGreen( green );
                    ret.setBlue( blue );
                }
            }
        }
    }
    return ret;
}

QColor Style::mergeColors(const QColor &colorA, const QColor &colorB, int factor) const
{
    QColor tmp = colorA;
    tmp.setRed((tmp.red() * factor) / maxFactor + (colorB.red() * (maxFactor - factor)) / maxFactor);
    tmp.setGreen((tmp.green() * factor) / maxFactor + (colorB.green() * (maxFactor - factor)) / maxFactor);
    tmp.setBlue((tmp.blue() * factor) / maxFactor + (colorB.blue() * (maxFactor - factor)) / maxFactor);
    return tmp;
}

QColor readColor(QDomElement e)
      {
      QColor c;
      c.setRed(e.attribute("r").toInt());
      c.setGreen(e.attribute("g").toInt());
      c.setBlue(e.attribute("b").toInt());
      return c;
      }

static void dampColors(QColor &col)
{
    //Reduce the colors that are less visible to the eye, because they are closer to black when it comes to contrast
    //The most significant color to the eye is green. Then comes red, and then blue, with blue _much_ less significant.

    col.setBlue(0);
    col.setRed(col.red() / 2);
}