void LineNumberWidget::paintEvent(QPaintEvent *){
int contentsY = editor->verticalScrollBar()->value();
qreal pageBottom = contentsY + editor->viewport()->height();
int lineNumber = 1;
const QFontMetrics fm = fontMetrics();
const int ascent = fontMetrics().ascent() + 1; // height = ascent + descent + 1
QPainter p(this);
for (QTextBlock block = editor->document()->begin();block.isValid();block = block.next(), ++lineNumber) {
QTextLayout *layout = block.layout();
const QRectF boundingRect = layout->boundingRect();
QPointF position = layout->position();
if (position.y() + boundingRect.height() < contentsY)
continue;
if (position.y() > pageBottom)
break;
const QString txt = QString::number(lineNumber);
p.drawText(width() - fm.width(txt), qRound(position.y()) - contentsY + ascent, txt);
}
}
void BoxBuilder::build(const QTextDocument* doc,const QSize& pixmapSize, const QColor& glyphColor)
{
pixmap_ = QPixmap(pixmapSize);
pixmap_.fill(Qt::white);
glyphPen_ = QPen(glyphColor);
boxes_.clear();
for(QTextBlock block = doc->begin();block!=doc->end();block=block.next())
{
//log_ << "BLOCK has started" << std::endl;
QTextLayout* tl = block.layout();
QString blockText = block.text();
QList<QGlyphRun> glyphs = tl->glyphRuns();
int glyphsNum = 0;
std::for_each(glyphs.begin(),glyphs.end(),[&glyphsNum](QGlyphRun grun)
{
glyphsNum += grun.glyphIndexes().size();
});
if(glyphsNum != blockText.length())
log_ << " the number of glyphs in the layout differs with text length, the numbers are: " <<
glyphsNum << " and " << blockText.length() << std::endl;
glyphPosition_ = tl->position();
blockText_ = blockText;
std::for_each( glyphs.begin(),
glyphs.end(),
[this](const QGlyphRun& grun)
{handleGlyphRun_(grun);});
}
}
void TextLineNumbers::paintEvent( QPaintEvent* )
{
int contentsY = m_textEdit->verticalScrollBar()->value();
qreal pageBottom = contentsY + m_textEdit->viewport()->height();
int m_lineNumber = 1;
const QFontMetrics fm = fontMetrics();
const int ascent = fontMetrics().ascent() +1;
QPainter p( this );
for ( QTextBlock block = m_textEdit->document()->begin(); block.isValid(); block = block.next(), m_lineNumber++ )
{
QTextLayout* layout = block.layout();
const QRectF boundingRect = layout->boundingRect();
QPointF position = layout->position();
if ( position.y() +boundingRect.height() < contentsY )
continue;
if ( position.y() > pageBottom )
break;
const QString txt = QString::number( m_lineNumber - 1 );
p.drawText( width() -fm.width( txt ) - 2, qRound( position.y() ) -contentsY +ascent, txt ); // -fm.width( "0" ) is an ampty place/indent
}
p.end();
}
void TextLayer::recreateTexture(VidgfxContext *gfx)
{
if(!m_isTexDirty)
return; // Don't waste any time if it hasn't changed
m_isTexDirty = false;
// Delete existing texture if one exists
if(m_texture != NULL)
vidgfx_context_destroy_tex(gfx, m_texture);
m_texture = NULL;
// Determine texture size. We need to keep in mind that the text in the
// document might extend outside of the layer's bounds.
m_document.setTextWidth(m_rect.width());
QSize size(
(int)ceilf(m_document.size().width()),
(int)ceilf(m_document.size().height()));
if(m_document.isEmpty() || size.isEmpty()) {
// Nothing to display
return;
}
// Create temporary canvas. We need to be careful here as text is rendered
// differently on premultiplied vs non-premultiplied pixel formats. On a
// premultiplied format text is rendered with subpixel rendering enabled
// while on a non-premultiplied format it is not. As we don't want subpixel
// rendering we use the standard ARGB32 format.
QSize imgSize(
size.width() + m_strokeSize * 2, size.height() + m_strokeSize * 2);
QImage img(imgSize, QImage::Format_ARGB32);
img.fill(Qt::transparent);
QPainter p(&img);
p.setRenderHint(QPainter::Antialiasing, true);
// Render text
//m_document.drawContents(&p);
// Render stroke
if(m_strokeSize > 0) {
#define STROKE_TECHNIQUE 0
#if STROKE_TECHNIQUE == 0
// Technique 0: Use QTextDocument's built-in text outliner
//quint64 timeStart = App->getUsecSinceExec();
QTextDocument *outlineDoc = m_document.clone(this);
QTextCharFormat format;
QPen pen(m_strokeColor, (double)(m_strokeSize * 2));
pen.setJoinStyle(Qt::RoundJoin);
format.setTextOutline(pen);
QTextCursor cursor(outlineDoc);
cursor.select(QTextCursor::Document);
cursor.mergeCharFormat(format);
// Take into account the stroke offset
p.translate(m_strokeSize, m_strokeSize);
//quint64 timePath = App->getUsecSinceExec();
outlineDoc->drawContents(&p);
delete outlineDoc;
//quint64 timeEnd = App->getUsecSinceExec();
//appLog() << "Path time = " << (timePath - timeStart) << " usec";
//appLog() << "Render time = " << (timeEnd - timePath) << " usec";
//appLog() << "Full time = " << (timeEnd - timeStart) << " usec";
#elif STROKE_TECHNIQUE == 1
// Technique 1: Create a text QPainterPath and stroke it
quint64 timeStart = App->getUsecSinceExec();
// Create the path for the text's stroke
QPainterPath path;
QTextBlock &block = m_document.firstBlock();
int numBlocks = m_document.blockCount();
for(int i = 0; i < numBlocks; i++) {
QTextLayout *layout = block.layout();
for(int j = 0; j < layout->lineCount(); j++) {
QTextLine &line = layout->lineAt(j);
const QString text = block.text().mid(
line.textStart(), line.textLength());
QPointF pos = layout->position() + line.position();
pos.ry() += line.ascent();
//appLog() << pos << ": " << text;
path.addText(pos, block.charFormat().font(), text);
}
block = block.next();
}
quint64 timePath = App->getUsecSinceExec();
path = path.simplified(); // Fixes gaps with large stroke sizes
quint64 timeSimplify = App->getUsecSinceExec();
// Render the path
//p.strokePath(path, QPen(m_strokeColor, m_strokeSize));
// Convert it to a stroke
QPainterPathStroker stroker;
stroker.setWidth(m_strokeSize);
//stroker.setCurveThreshold(2.0);
stroker.setJoinStyle(Qt::RoundJoin);
path = stroker.createStroke(path);
// Render the path
p.fillPath(path, m_strokeColor);
quint64 timeEnd = App->getUsecSinceExec();
appLog() << "Path time = " << (timePath - timeStart) << " usec";
appLog() << "Simplify time = " << (timeSimplify - timePath) << " usec";
appLog() << "Render time = " << (timeEnd - timeSimplify) << " usec";
appLog() << "Full time = " << (timeEnd - timeStart) << " usec";
#elif STROKE_TECHNIQUE == 2
// Technique 2: Similar to technique 1 but do each block separately
quint64 timeStart = App->getUsecSinceExec();
quint64 timeTotalSimplify = 0;
quint64 timeTotalRender = 0;
// Create the path for the text's stroke
QTextBlock &block = m_document.firstBlock();
int numBlocks = m_document.blockCount();
for(int i = 0; i < numBlocks; i++) {
// Convert this block to a painter path
QPainterPath path;
QTextLayout *layout = block.layout();
for(int j = 0; j < layout->lineCount(); j++) {
QTextLine &line = layout->lineAt(j);
const QString text = block.text().mid(
line.textStart(), line.textLength());
QPointF pos = layout->position() + line.position() +
QPointF(m_strokeSize, m_strokeSize);
pos.ry() += line.ascent();
//appLog() << pos << ": " << text;
path.addText(pos, block.charFormat().font(), text);
}
// Prevent gaps appearing at larger stroke sizes
quint64 timeA = App->getUsecSinceExec();
path = path.simplified();
quint64 timeB = App->getUsecSinceExec();
timeTotalSimplify += timeB - timeA;
// Render the path
QPen pen(m_strokeColor, m_strokeSize * 2);
pen.setJoinStyle(Qt::RoundJoin);
p.strokePath(path, pen);
timeA = App->getUsecSinceExec();
timeTotalRender += timeA - timeB;
// Iterate
block = block.next();
}
// Make the final draw take into account the stroke offset
p.translate(m_strokeSize, m_strokeSize);
quint64 timeEnd = App->getUsecSinceExec();
appLog() << "Simplify time = " << timeTotalSimplify << " usec";
appLog() << "Render time = " << timeTotalRender << " usec";
appLog() << "Full time = " << (timeEnd - timeStart) << " usec";
#elif STROKE_TECHNIQUE == 3
// Technique 3: Raster brute-force where for each destination pixel
// we measure the distance to the closest opaque source pixel
quint64 timeStart = App->getUsecSinceExec();
// Get bounding region based on text line bounding rects
QRegion region;
QTextBlock &block = m_document.firstBlock();
int numBlocks = m_document.blockCount();
for(int i = 0; i < numBlocks; i++) {
QTextLayout *layout = block.layout();
for(int j = 0; j < layout->lineCount(); j++) {
QTextLine &line = layout->lineAt(j);
const QString text = block.text().mid(
line.textStart(), line.textLength());
QRect rect = line.naturalTextRect()
.translated(layout->position()).toAlignedRect();
if(rect.isEmpty())
continue; // Don't add empty rectangles
rect.adjust(0, 0, 1, 0); // QTextLine is incorrect?
rect.adjust(
-m_strokeSize, -m_strokeSize,
m_strokeSize, m_strokeSize);
//appLog() << rect;
region += rect;
}
// Iterate
block = block.next();
}
quint64 timeRegion = App->getUsecSinceExec();
#if 0
// Debug bounding region
QPainterPath regionPath;
regionPath.addRegion(region);
regionPath.setFillRule(Qt::WindingFill);
p.fillPath(regionPath, QColor(255, 0, 0, 128));
#endif // 0
// We cannot read and write to the same image at the same time so
// create a second one. Note that this is not premultiplied.
QImage imgOut(size, QImage::Format_ARGB32);
imgOut.fill(Qt::transparent);
// Do distance calculation. We assume that non-fully transparent
// pixels are always next to a fully opaque one so if the closest
// "covered" pixel is not fully opaque then we can use that pixel's
// opacity to determine the distance to the shape's edge.
for(int y = 0; y < img.height(); y++) {
for(int x = 0; x < img.width(); x++) {
if(!region.contains(QPoint(x, y)))
continue;
float dist = getDistance(img, x, y, m_strokeSize);
// We fake antialiasing by blurring the edge by 1px
float outEdge = (float)m_strokeSize;
if(dist >= outEdge)
continue; // Outside stroke completely
float opacity = qMin(1.0f, outEdge - dist);
QColor col = m_strokeColor;
col.setAlphaF(col.alphaF() * opacity);
// Blend the stroke so that it appears under the existing
// pixel data
QRgb origRgb = img.pixel(x, y);
QColor origCol(origRgb);
origCol.setAlpha(qAlpha(origRgb));
col = blendColors(col, origCol, 1.0f);
imgOut.setPixel(x, y, col.rgba());
}
}
quint64 timeRender = App->getUsecSinceExec();
// Swap image data
p.end();
img = imgOut;
p.begin(&img);
quint64 timeEnd = App->getUsecSinceExec();
appLog() << "Region time = " << (timeRegion - timeStart) << " usec";
appLog() << "Render time = " << (timeRender - timeRegion) << " usec";
appLog() << "Swap time = " << (timeEnd - timeRender) << " usec";
appLog() << "Full time = " << (timeEnd - timeStart) << " usec";
#endif // STROKE_TECHNIQUE
}
// Render text
m_document.drawContents(&p);
// Convert the image to a GPU texture
m_texture = vidgfx_context_new_tex(gfx, img);
// Preview texture for debugging
//img.save(App->getDataDirectory().filePath("Preview.png"));
}
void Text::layout()
{
#if 0
QSizeF pageSize(-1.0, 1000000);
setPos(0.0, 0.0);
if (parent() && _layoutToParentWidth) {
pageSize.setWidth(parent()->width());
if (parent()->type() == HBOX || parent()->type() == VBOX || parent()->type() == TBOX) {
Box* box = static_cast<Box*>(parent());
rxpos() += box->leftMargin() * DPMM;
rypos() += box->topMargin() * DPMM;
// pageSize.setHeight(box->height() - (box->topMargin() + box->bottomMargin()) * DPMM);
pageSize.setWidth(box->width() - (box->leftMargin() + box->rightMargin()) * DPMM);
}
}
QTextOption to = _doc->defaultTextOption();
to.setUseDesignMetrics(true);
to.setWrapMode(pageSize.width() <= 0.0 ? QTextOption::NoWrap : QTextOption::WrapAtWordBoundaryOrAnywhere);
_doc->setDefaultTextOption(to);
if (pageSize.width() <= 0.0)
_doc->setTextWidth(_doc->idealWidth());
else
_doc->setPageSize(pageSize);
if (hasFrame()) {
frame = QRectF();
for (QTextBlock tb = _doc->begin(); tb.isValid(); tb = tb.next()) {
QTextLayout* tl = tb.layout();
int n = tl->lineCount();
for (int i = 0; i < n; ++i)
// frame |= tl->lineAt(0).naturalTextRect().translated(tl->position());
frame |= tl->lineAt(0).rect().translated(tl->position());
}
if (circle()) {
if (frame.width() > frame.height()) {
frame.setY(frame.y() + (frame.width() - frame.height()) * -.5);
frame.setHeight(frame.width());
}
else {
frame.setX(frame.x() + (frame.height() - frame.width()) * -.5);
frame.setWidth(frame.height());
}
}
qreal w = (paddingWidth() + frameWidth() * .5) * DPMM;
frame.adjust(-w, -w, w, w);
w = frameWidth() * DPMM;
_bbox = frame.adjusted(-w, -w, w, w);
}
else {
_bbox = QRectF(QPointF(0.0, 0.0), _doc->size()); //_doc->documentLayout()->frameBoundingRect(_doc->rootFrame());
}
_doc->setModified(false);
style().layout(this); // process alignment
if ((style().align() & ALIGN_VCENTER) && (subtype() == TEXT_TEXTLINE)) {
// special case: vertically centered text with TextLine needs to
// take into account the line width
TextLineSegment* tls = (TextLineSegment*)parent();
TextLine* tl = (TextLine*)(tls->line());
qreal textlineLineWidth = point(tl->lineWidth());
rypos() -= textlineLineWidth * .5;
}
if (parent() == 0)
return;
if (parent()->type() == SEGMENT) {
Segment* s = static_cast<Segment*>(parent());
rypos() += s ? s->measure()->system()->staff(staffIdx())->y() : 0.0;
}
#endif
Font f = style().font(spatium());
qreal asc, desc, leading;
qreal w = textMetrics(f.family(), _text, f.size(), &asc, &desc, &leading);
// printf("text(%s) asc %f desc %f leading %f w %f\n", qPrintable(_text), asc, desc, leading, w);
_lineHeight = asc + desc;
_lineSpacing = _lineHeight + leading;
_baseLine = asc;
setbbox(QRectF(0.0, -asc, w, _lineHeight));
#if 0
if (parent() && _layoutToParentWidth) {
qreal wi = parent()->width();
qreal ph = parent()->height();
qreal x;
qreal y = pos.y();
if (align() & ALIGN_HCENTER)
x = (wi - w) * .5;
else if (align() & ALIGN_RIGHT)
x = wi - w;
else
x = 0.0;
if (align() & ALIGN_VCENTER)
y = (ph - asc) * .5;
else if (align() & ALIGN_BOTTOM)
y = ph - asc;
else
y = asc;
setPos(x, y + asc);
}
#endif
style().layout(this); // process alignment
rypos() += asc;
if (parent() && _layoutToParentWidth) {
qreal wi = parent()->width();
if (align() & ALIGN_HCENTER)
rxpos() = (wi - w) * .5;
else if (align() & ALIGN_RIGHT)
rxpos() = wi - w;
}
if ((style().align() & ALIGN_VCENTER) && (subtype() == TEXT_TEXTLINE)) {
// special case: vertically centered text with TextLine needs to
// take into account the line width
TextLineSegment* tls = (TextLineSegment*)parent();
TextLine* tl = (TextLine*)(tls->line());
qreal textlineLineWidth = point(tl->lineWidth());
rypos() -= textlineLineWidth * .5;
}
if (parent() == 0)
return;
if (parent()->type() == SEGMENT) {
Segment* s = static_cast<Segment*>(parent());
rypos() += s ? s->measure()->system()->staff(staffIdx())->y() : 0.0;
}
}
