QPixmap blurImage(const QImage &image, int radius)
{
QGraphicsBlurEffect *blur = new QGraphicsBlurEffect;
blur->setBlurRadius(radius);
QImage result = applyEffectToImage(image, blur);
int cropWidth = 20;
QRect rect(cropWidth, cropWidth,
result.width() - cropWidth * 2,
result.height() - cropWidth * 2);
QImage cropped = result.copy(rect);
return QPixmap::fromImage(cropped);
}
QImage BrushPainter::drawBrush(Brush &brush, QSize size)
{
QImage img(size, QImage::Format_RGBA8888);
QGraphicsColorizeEffect *effect;
QGraphicsBlurEffect *blur;
effect = new QGraphicsColorizeEffect();
blur = new QGraphicsBlurEffect();
effect->setColor(brush.color_main);
blur->setBlurRadius(brush.blur);
QImage drawImg = applyEffectToImage(brush.img,effect);
int width = drawImg.scaled(brush.size, brush.size, Qt::KeepAspectRatio).width();
if(width < 4)
width = 4;
QBrush qBrush;
QPainter paint(&img);
paint.setBrush(qBrush);
QImage resultImg;
QTransform transformation;
paint.setOpacity((double)brush.opacity/100);
int n = (size.width() - 100 ) / (width/4);
n--;
for(int j = 0; j <= brush.count; j++)
for(int i = 0; i < n; i++)
{
int b = brush.size_delta/2 - rand() % ((int)brush.size_delta + 1);
int m = brush.dispers/2 - rand() % ((int)brush.dispers + 1);
// transformation.rotate(brush.angle_delta/2 - rand() % ((int)brush.angle_delta + 1));
resultImg = drawImg.scaled(brush.size + b, brush.size + b, Qt::KeepAspectRatio).transformed(transformation);
qBrush.setTextureImage(resultImg);
paint.drawImage(i*resultImg.width()/4,size.height()/2 - resultImg.height()/2 + m,resultImg);
}
// paint.fillRect(0,0,200,200,QBrush(brush.color_main, Qt::SolidPattern));
bool bEnd = paint.end();
return applyEffectToImage(img, blur);
}
QImage BrushPainter::applyColor(Brush brush)
{
qDebug()<< "apply color";
QImage res(brush.img.size()*2, QImage::Format_RGBA8888_Premultiplied);
res.fill(Qt::transparent);
QPainter paint;
paint.begin(&res);
paint.setOpacity((double)brush.opacity/100);
paint.drawImage(brush.img.width()/2,brush.img.height()/2, brush.img);
paint.end();
QGraphicsColorizeEffect *effect;
effect = new QGraphicsColorizeEffect();
effect->setColor(brush.color_main);
res = applyEffectToImage(res, effect);
// res = applyEffectToImage(res, effect);
return res;
}
QImage BrushPainter::applyBlur(Brush brush)
{
QImage res(brush.img.size()*2, QImage::Format_RGBA8888_Premultiplied);
res.fill(Qt::transparent);
QPainter paint;
paint.begin(&res);
paint.setOpacity((double)brush.opacity/100);
paint.drawImage(brush.img.width()/2,brush.img.height()/2, brush.img);
paint.end();
QGraphicsBlurEffect *blur;
blur = new QGraphicsBlurEffect();
blur->setBlurRadius(brush.blur);
qDebug () << "set blur radius:"<<brush.blur;
// res = applyEffectToImage(res.scaled(brush.img.size()), blur);
res = applyEffectToImage(res, blur);
return res;
}