void BitmapFont::calculateGlyphsWidthsAutomatically(const ImagePtr& image, const Size& glyphSize)
{
if(!image)
return;
int numHorizontalGlyphs = image->getSize().width() / glyphSize.width();
auto texturePixels = image->getPixels();
// small AI to auto calculate pixels widths
for(int glyph = m_firstGlyph; glyph< 256; ++glyph) {
Rect glyphCoords(((glyph - m_firstGlyph) % numHorizontalGlyphs) * glyphSize.width(),
((glyph - m_firstGlyph) / numHorizontalGlyphs) * glyphSize.height(),
glyphSize.width(),
m_glyphHeight);
int width = glyphSize.width();
for(int x = glyphCoords.left(); x <= glyphCoords.right(); ++x) {
int filledPixels = 0;
// check if all vertical pixels are alpha
for(int y = glyphCoords.top(); y <= glyphCoords.bottom(); ++y) {
if(texturePixels[(y * image->getSize().width() * 4) + (x*4) + 3] != 0)
filledPixels++;
}
if(filledPixels > 0)
width = x - glyphCoords.left() + 1;
}
// store glyph size
m_glyphsSize[glyph].resize(width, m_glyphHeight);
}
}
bool VCard_LDIFCreator::createImageSmall()
{
text = name + '\n' + text;
if ( !mFont ) {
QString pixmap = KStandardDirs::locate( "data", "kio_thumbnail/pics/thumbnailfont_7x4.png" );
if ( pixmap.isEmpty() ) {
kWarning() <<"VCard_LDIFCreator: Font image \"thumbnailfont_7x4.png\" not found!";
return false;
}
mFont = new QPixmap( pixmap );
}
QSize chSize(4, 7); // the size of one char
int xOffset = chSize.width();
int yOffset = chSize.height();
// calculate a better border so that the text is centered
int canvasWidth = pixmapSize.width() - 2 * xborder;
int canvasHeight = pixmapSize.height() - 2 * yborder;
int numCharsPerLine = (int) (canvasWidth / chSize.width());
int numLines = (int) (canvasHeight / chSize.height());
// render the information
QRect rect;
int rest = mPixmap.width() - (numCharsPerLine * chSize.width());
xborder = qMax( xborder, rest / 2 ); // center horizontally
rest = mPixmap.height() - (numLines * chSize.height());
yborder = qMax( yborder, rest / 2 ); // center vertically
// end centering
int x = xborder, y = yborder; // where to paint the characters
int posNewLine = mPixmap.width() - (chSize.width() + xborder);
int posLastLine = mPixmap.height() - (chSize.height() + yborder);
bool newLine = false;
Q_ASSERT( posNewLine > 0 );
for ( int i = 0; i < text.length(); ++i ) {
if ( x > posNewLine || newLine ) { // start a new line?
x = xborder;
y += yOffset;
if ( y > posLastLine ) // more text than space
break;
// after starting a new line, we also jump to the next
// physical newline in the file if we don't come from one
if ( !newLine ) {
int pos = text.indexOf( '\n', i );
if ( pos > (int) i )
i = pos +1;
}
newLine = false;
}
// check for newlines in the text (unix,dos)
QChar ch = text.at( i );
if ( ch == '\n' ) {
newLine = true;
continue;
} else if ( ch == '\r' && text.at(i+1) == '\n' ) {
newLine = true;
i++; // skip the next character (\n) as well
continue;
}
rect = glyphCoords( (unsigned char)ch.toLatin1(), mFont->width() );
if ( !rect.isEmpty() ) {
QPainter p( &mPixmap );
p.drawPixmap( QPoint( x, y ), *mFont, rect );
// bitBlt( &mPixmap, QPoint(x,y), mFont, rect );
}
x += xOffset; // next character
}
return true;
}
