QSGMaterialShader *QSGTextMaskMaterial::createShader() const
{
QFontEngine::GlyphFormat glyphFormat = glyphCache()->glyphFormat();
return glyphFormat == QFontEngine::Format_A32
? (QSGMaterialShader *) new QSG24BitTextMaskShader(glyphFormat)
: (QSGMaterialShader *) new QSG8BitTextMaskShader(glyphFormat);
}
bool QSGTextMaskMaterial::ensureUpToDate()
{
QSize glyphCacheSize(glyphCache()->width(), glyphCache()->height());
if (glyphCacheSize != m_size) {
if (m_texture)
delete m_texture;
m_texture = new QSGPlainTexture();
m_texture->setTextureId(glyphCache()->texture());
m_texture->setTextureSize(QSize(glyphCache()->width(), glyphCache()->height()));
m_texture->setOwnsTexture(false);
m_size = glyphCacheSize;
return true;
} else {
return false;
}
}
QSGMaterialShader *QSGOutlinedTextMaterial::createShader() const
{
return new QSGOutlinedTextShader(glyphCache()->glyphFormat());
}
int QSGTextMaskMaterial::cacheTextureHeight() const
{
return glyphCache()->height();
}
int QSGTextMaskMaterial::cacheTextureWidth() const
{
return glyphCache()->width();
}
QSGMaterialType *QSGTextMaskMaterial::type() const
{
static QSGMaterialType rgb, gray;
return glyphCache()->glyphFormat() == QFontEngine::Format_A32 ? &rgb : &gray;
}
void QSGTextMaskMaterial::populate(const QPointF &p,
const QVector<quint32> &glyphIndexes,
const QVector<QPointF> &glyphPositions,
QSGGeometry *geometry,
QRectF *boundingRect,
QPointF *baseLine,
const QMargins &margins)
{
Q_ASSERT(m_font.isValid());
QVector<QFixedPoint> fixedPointPositions;
for (int i=0; i<glyphPositions.size(); ++i)
fixedPointPositions.append(QFixedPoint::fromPointF(glyphPositions.at(i)));
QTextureGlyphCache *cache = glyphCache();
QRawFontPrivate *fontD = QRawFontPrivate::get(m_font);
cache->populate(fontD->fontEngine, glyphIndexes.size(), glyphIndexes.constData(),
fixedPointPositions.data());
cache->fillInPendingGlyphs();
int margin = fontD->fontEngine->glyphMargin(cache->glyphFormat());
qreal glyphCacheScaleX = cache->transform().m11();
qreal glyphCacheScaleY = cache->transform().m22();
qreal glyphCacheInverseScaleX = 1.0 / glyphCacheScaleX;
qreal glyphCacheInverseScaleY = 1.0 / glyphCacheScaleY;
Q_ASSERT(geometry->indexType() == GL_UNSIGNED_SHORT);
geometry->allocate(glyphIndexes.size() * 4, glyphIndexes.size() * 6);
QVector4D *vp = (QVector4D *)geometry->vertexDataAsTexturedPoint2D();
Q_ASSERT(geometry->sizeOfVertex() == sizeof(QVector4D));
ushort *ip = geometry->indexDataAsUShort();
QPointF position(p.x(), p.y() - m_font.ascent());
bool supportsSubPixelPositions = fontD->fontEngine->supportsSubPixelPositions();
for (int i=0; i<glyphIndexes.size(); ++i) {
QFixed subPixelPosition;
if (supportsSubPixelPositions)
subPixelPosition = fontD->fontEngine->subPixelPositionForX(QFixed::fromReal(glyphPositions.at(i).x()));
QTextureGlyphCache::GlyphAndSubPixelPosition glyph(glyphIndexes.at(i), subPixelPosition);
const QTextureGlyphCache::Coord &c = cache->coords.value(glyph);
QPointF glyphPosition = glyphPositions.at(i) + position;
// On a retina screen the glyph positions are not pre-scaled (as opposed to
// eg. the raster paint engine). To ensure that we get the same behavior as
// the raster engine (and CoreText itself) when it comes to rounding of the
// coordinates, we need to apply the scale factor before rounding, and then
// apply the inverse scale to get back to the coordinate system of the node.
qreal x = (qFloor(glyphPosition.x() * glyphCacheScaleX) * glyphCacheInverseScaleX) +
(c.baseLineX * glyphCacheInverseScaleX) - margin;
qreal y = (qRound(glyphPosition.y() * glyphCacheScaleY) * glyphCacheInverseScaleY) -
(c.baseLineY * glyphCacheInverseScaleY) - margin;
qreal w = c.w * glyphCacheInverseScaleX;
qreal h = c.h * glyphCacheInverseScaleY;
*boundingRect |= QRectF(x + margin, y + margin, w, h);
float cx1 = x - margins.left();
float cx2 = x + w + margins.right();
float cy1 = y - margins.top();
float cy2 = y + h + margins.bottom();
float tx1 = c.x - margins.left();
float tx2 = c.x + c.w + margins.right();
float ty1 = c.y - margins.top();
float ty2 = c.y + c.h + margins.bottom();
if (baseLine->isNull())
*baseLine = glyphPosition;
vp[4 * i + 0] = QVector4D(cx1, cy1, tx1, ty1);
vp[4 * i + 1] = QVector4D(cx2, cy1, tx2, ty1);
vp[4 * i + 2] = QVector4D(cx1, cy2, tx1, ty2);
vp[4 * i + 3] = QVector4D(cx2, cy2, tx2, ty2);
int o = i * 4;
ip[6 * i + 0] = o + 0;
ip[6 * i + 1] = o + 2;
ip[6 * i + 2] = o + 3;
ip[6 * i + 3] = o + 3;
ip[6 * i + 4] = o + 1;
ip[6 * i + 5] = o + 0;
}
}
void QSGTextMaskMaterial::populate(const QPointF &p,
const QVector<quint32> &glyphIndexes,
const QVector<QPointF> &glyphPositions,
QSGGeometry *geometry,
QRectF *boundingRect,
QPointF *baseLine,
const QMargins &margins)
{
Q_ASSERT(m_font.isValid());
QVector<QFixedPoint> fixedPointPositions;
for (int i=0; i<glyphPositions.size(); ++i)
fixedPointPositions.append(QFixedPoint::fromPointF(glyphPositions.at(i)));
QTextureGlyphCache *cache = glyphCache();
QRawFontPrivate *fontD = QRawFontPrivate::get(m_font);
cache->populate(fontD->fontEngine, glyphIndexes.size(), glyphIndexes.constData(),
fixedPointPositions.data());
cache->fillInPendingGlyphs();
int margin = fontD->fontEngine->glyphMargin(cache->cacheType());
Q_ASSERT(geometry->indexType() == GL_UNSIGNED_SHORT);
geometry->allocate(glyphIndexes.size() * 4, glyphIndexes.size() * 6);
QVector4D *vp = (QVector4D *)geometry->vertexDataAsTexturedPoint2D();
Q_ASSERT(geometry->sizeOfVertex() == sizeof(QVector4D));
ushort *ip = geometry->indexDataAsUShort();
QPointF position(p.x(), p.y() - m_font.ascent());
bool supportsSubPixelPositions = fontD->fontEngine->supportsSubPixelPositions();
for (int i=0; i<glyphIndexes.size(); ++i) {
QFixed subPixelPosition;
if (supportsSubPixelPositions)
subPixelPosition = fontD->fontEngine->subPixelPositionForX(QFixed::fromReal(glyphPositions.at(i).x()));
QTextureGlyphCache::GlyphAndSubPixelPosition glyph(glyphIndexes.at(i), subPixelPosition);
const QTextureGlyphCache::Coord &c = cache->coords.value(glyph);
QPointF glyphPosition = glyphPositions.at(i) + position;
int x = qFloor(glyphPosition.x()) + c.baseLineX - margin;
int y = qFloor(glyphPosition.y()) - c.baseLineY - margin;
*boundingRect |= QRectF(x + margin, y + margin, c.w, c.h);
float cx1 = x - margins.left();
float cx2 = x + c.w + margins.right();
float cy1 = y - margins.top();
float cy2 = y + c.h + margins.bottom();
float tx1 = c.x - margins.left();
float tx2 = c.x + c.w + margins.right();
float ty1 = c.y - margins.top();
float ty2 = c.y + c.h + margins.bottom();
if (baseLine->isNull())
*baseLine = glyphPosition;
vp[4 * i + 0] = QVector4D(cx1, cy1, tx1, ty1);
vp[4 * i + 1] = QVector4D(cx2, cy1, tx2, ty1);
vp[4 * i + 2] = QVector4D(cx1, cy2, tx1, ty2);
vp[4 * i + 3] = QVector4D(cx2, cy2, tx2, ty2);
int o = i * 4;
ip[6 * i + 0] = o + 0;
ip[6 * i + 1] = o + 2;
ip[6 * i + 2] = o + 3;
ip[6 * i + 3] = o + 3;
ip[6 * i + 4] = o + 1;
ip[6 * i + 5] = o + 0;
}
}
