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This commit is contained in:
feiyangqingyun
2021-10-08 10:52:05 +08:00
parent f6923b97a2
commit 200b7eeafb
171 changed files with 2894 additions and 1940 deletions
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31
qwtdemo/qwt/qwt_widget_overlay.cpp
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@@ -1,4 +1,4 @@
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
@@ -13,7 +13,6 @@
#include <qpaintengine.h>
#include <qimage.h>
#include <qevent.h>
#include "qpainterpath.h"
static QImage::Format qwtMaskImageFormat()
{
@@ -23,8 +22,8 @@ static QImage::Format qwtMaskImageFormat()
return QImage::Format_ARGB32_Premultiplied;
}
static QRegion qwtAlphaMask(
const QImage& image, const QVector<QRect> rects )
static QRegion qwtAlphaMask(
const QImage& image, const QVector<QRect> &rects )
{
const int w = image.width();
const int h = image.height();
@@ -42,33 +41,33 @@ static QRegion qwtAlphaMask(
y1 = qMax( y1, 0 );
y2 = qMin( y2, h - 1 );
for ( int y = y1; y <= y2; ++y )
for ( int y = y1; y <= y2; ++y )
{
bool inRect = false;
int rx0 = -1;
const uint *line =
const uint *line =
reinterpret_cast<const uint *> ( image.scanLine( y ) ) + x1;
for ( int x = x1; x <= x2; x++ )
for ( int x = x1; x <= x2; x++ )
{
const bool on = ( ( *line++ >> 24 ) != 0 );
if ( on != inRect )
if ( on != inRect )
{
if ( inRect )
if ( inRect )
{
rect.setCoords( rx0, y, x - 1, y );
region += rect;
}
else
}
else
{
rx0 = x;
}
inRect = on;
}
}
}
if ( inRect )
if ( inRect )
{
rect.setCoords( rx0, y, x2, y );
region = region.united( rect );
@@ -212,7 +211,7 @@ void QwtWidgetOverlay::updateMask()
d_data->rgbaBuffer = ( uchar* )::calloc( width() * height(), 4 );
QImage image( d_data->rgbaBuffer,
QImage image( d_data->rgbaBuffer,
width(), height(), qwtMaskImageFormat() );
QPainter painter( &image );
@@ -249,7 +248,7 @@ void QwtWidgetOverlay::updateMask()
*/
void QwtWidgetOverlay::paintEvent( QPaintEvent* event )
{
const QRegion clipRegion = event->region();
const QRegion &clipRegion = event->region();
QPainter painter( this );
@@ -266,7 +265,7 @@ void QwtWidgetOverlay::paintEvent( QPaintEvent* event )
if ( d_data->rgbaBuffer && useRgbaBuffer )
{
const QImage image( d_data->rgbaBuffer,
const QImage image( d_data->rgbaBuffer,
width(), height(), qwtMaskImageFormat() );
QVector<QRect> rects;