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* Custom blur method included. May be replace by Qt's internal one eventually.

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This commit is contained in:
Christian Muehlhaeuser 2014-08-12 20:18:47 +02:00
parent e416ed604b
commit 9e4ef5e380
2 changed files with 85 additions and 0 deletions
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83
src/libtomahawk/utils/TomahawkUtilsGui.cpp
View File

@ -932,6 +932,89 @@ squareCenterPixmap( const QPixmap& sourceImage )
}
QImage
blurred( const QImage& image, const QRect& rect, int radius, bool alphaOnly, bool blackWhite )
{
int tab[] = { 14, 10, 8, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 };
int alpha = (radius < 1) ? 16 : (radius > 17) ? 1 : tab[radius-1];
QImage result = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
if ( blackWhite )
{
for ( int i = 0; i < result.width(); ++i )
{
for (int j = 0; j < result.height(); ++j)
{
const QRgb col = result.pixel(i, j);
const int gray = qGray(col);
result.setPixel(i, j, qRgb(gray*0.3, gray*0.3, gray*0.3));
}
}
}
int r1 = rect.top();
int r2 = rect.bottom();
int c1 = rect.left();
int c2 = rect.right();
int bpl = result.bytesPerLine();
int rgba[4];
unsigned char* p;
int i1 = 0;
int i2 = 3;
if (alphaOnly)
i1 = i2 = (QSysInfo::ByteOrder == QSysInfo::BigEndian ? 0 : 3);
for (int col = c1; col <= c2; col++) {
p = result.scanLine(r1) + col * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p += bpl;
for (int j = r1; j < r2; j++, p += bpl)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int row = r1; row <= r2; row++) {
p = result.scanLine(row) + c1 * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p += 4;
for (int j = c1; j < c2; j++, p += 4)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int col = c1; col <= c2; col++) {
p = result.scanLine(r2) + col * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p -= bpl;
for (int j = r1; j < r2; j++, p -= bpl)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int row = r1; row <= r2; row++) {
p = result.scanLine(row) + c2 * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p -= 4;
for (int j = c1; j < c2; j++, p -= 4)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
return result;
}
void
drawCompositedPopup( QWidget* widget,
const QPainterPath& outline,

2
src/libtomahawk/utils/TomahawkUtilsGui.h
View File

@ -73,6 +73,8 @@ namespace TomahawkUtils
DLLEXPORT QPixmap addDropShadow( const QPixmap& sourceImage, const QSize& targetSize );
DLLEXPORT QPixmap squareCenterPixmap( const QPixmap& sourceImage );
DLLEXPORT QImage blurred( const QImage& image, const QRect& rect, int radius, bool alphaOnly = false, bool blackWhite = false );
DLLEXPORT void drawCompositedPopup( QWidget* widget, const QPainterPath& outline, const QColor& lineColor, const QBrush& backgroundBrush, qreal opacity );
}