QImage QwtPlotRasterItem::compose(
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &imageArea, const QRectF &paintRect,
const QSize &imageSize, bool doCache) const
{
QImage image;
if ( imageArea.isEmpty() || paintRect.isEmpty() || imageSize.isEmpty() )
return image;
if ( doCache )
{
if ( !d_data->cache.image.isNull()
&& d_data->cache.area == imageArea
&& d_data->cache.size == paintRect.size() )
{
image = d_data->cache.image;
}
}
if ( image.isNull() )
{
double dx = 0.0;
if ( paintRect.toRect().width() > imageSize.width() )
dx = imageArea.width() / imageSize.width();
const QwtScaleMap xxMap =
imageMap(Qt::Horizontal, xMap, imageArea, imageSize, dx);
double dy = 0.0;
if ( paintRect.toRect().height() > imageSize.height() )
dy = imageArea.height() / imageSize.height();
const QwtScaleMap yyMap =
imageMap(Qt::Vertical, yMap, imageArea, imageSize, dy);
image = renderImage( xxMap, yyMap, imageArea, imageSize );
if ( doCache )
{
d_data->cache.area = imageArea;
d_data->cache.size = paintRect.size();
d_data->cache.image = image;
}
}
if ( d_data->alpha >= 0 && d_data->alpha < 255 )
image = toRgba( image, d_data->alpha );
return image;
}
void pListView::setImage(unsigned selection, unsigned position, const image& image) {
//assign existing image
for(unsigned n = 0; n < images.size(); n++) {
if(images[n] == image) {
imageMap(selection)(position) = n;
return ListView_SetImage(hwnd, imageList, selection, position, n);
}
}
//append and assign new image
imageMap(selection)(position) = images.size();
images.append(image);
ImageList_Append(imageList, image, 15);
ListView_SetImage(hwnd, imageList, selection, position, imageMap(selection)(position));
}
void pListView::buildImageList() {
auto& list = listView.state.image;
unsigned columns = listView.state.text.size();
unsigned rows = max(1u, listView.state.headerText.size());
ListView_SetImageList(hwnd, NULL, LVSIL_SMALL);
if(imageList) ImageList_Destroy(imageList);
imageList = ImageList_Create(15, 15, ILC_COLOR32, 1, 0);
imageMap.reset();
images.reset();
images.append(nall::image()); //empty icon for cells without an image assigned (I_IMAGENONE does not work)
//create a vector of unique images from all images used (many cells may use the same image)
for(unsigned y = 0; y < list.size(); y++) {
for(unsigned x = 0; x < list[y].size(); x++) {
bool found = false;
for(unsigned z = 0; z < images.size(); z++) {
if(list[y][x] == images[z]) {
found = true;
imageMap(y)(x) = z;
break;
}
}
if(found == false) {
imageMap(y)(x) = images.size();
images.append(list[y][x]);
}
}
}
//build image list
for(auto& imageItem : images) ImageList_Append(imageList, imageItem, 15);
if(images.size() <= 1) return;
//set images for all cells
for(unsigned y = 0; y < columns; y++) {
for(unsigned x = 0; x < rows; x++) {
ListView_SetImage(hwnd, imageList, y, x, imageMap(y)(x));
}
}
}
QImage QwtPlotRasterItem::compose(
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &imageArea, const QRectF &paintRect,
const QSize &imageSize, bool doCache) const
{
QImage image;
if ( imageArea.isEmpty() || paintRect.isEmpty() || imageSize.isEmpty() )
return image;
if ( doCache )
{
if ( !d_data->cache.image.isNull()
&& d_data->cache.area == imageArea
&& d_data->cache.size == paintRect.size() )
{
image = d_data->cache.image;
}
}
if ( image.isNull() )
{
double dx = 0.0;
if ( paintRect.toRect().width() > imageSize.width() )
dx = imageArea.width() / imageSize.width();
const QwtScaleMap xxMap =
imageMap(Qt::Horizontal, xMap, imageArea, imageSize, dx);
double dy = 0.0;
if ( paintRect.toRect().height() > imageSize.height() )
dy = imageArea.height() / imageSize.height();
const QwtScaleMap yyMap =
imageMap(Qt::Vertical, yMap, imageArea, imageSize, dy);
image = renderImage( xxMap, yyMap, imageArea, imageSize );
if ( doCache )
{
d_data->cache.area = imageArea;
d_data->cache.size = paintRect.size();
d_data->cache.image = image;
}
}
if ( d_data->alpha >= 0 && d_data->alpha < 255 )
{
QImage alphaImage( image.size(), QImage::Format_ARGB32 );
#if QT_VERSION >= 0x040400 && !defined(QT_NO_QFUTURE)
uint numThreads = renderThreadCount();
if ( numThreads <= 0 )
numThreads = QThread::idealThreadCount();
if ( numThreads <= 0 )
numThreads = 1;
const int numRows = image.height() / numThreads;
QList< QFuture<void> > futures;
for ( uint i = 0; i < numThreads; i++ )
{
QRect tile( 0, i * numRows, image.width(), numRows );
if ( i == numThreads - 1 )
{
tile.setHeight( image.height() - i * numRows );
qwtToRgba( &image, &alphaImage, tile, d_data->alpha );
}
else
{
futures += QtConcurrent::run(
&qwtToRgba, &image, &alphaImage, tile, d_data->alpha );
}
}
for ( int i = 0; i < futures.size(); i++ )
futures[i].waitForFinished();
#else
const QRect tile( 0, 0, image.width(), image.height() );
qwtToRgba( &image, &alphaImage, tile, d_data->alpha );
#endif
image = alphaImage;
}
return image;
}
