diff options
Diffstat (limited to 'src/gui/painting/qpainter.cpp')
| -rw-r--r-- | src/gui/painting/qpainter.cpp | 377 |
1 files changed, 369 insertions, 8 deletions
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp index bf12c6b..dc96c17 100644 --- a/src/gui/painting/qpainter.cpp +++ b/src/gui/painting/qpainter.cpp @@ -38,6 +38,7 @@ ** $QT_END_LICENSE$ ** ****************************************************************************/ + // QtCore #include <qdebug.h> #include <qmath.h> @@ -69,6 +70,8 @@ #include <private/qwidget_p.h> #include <private/qpaintengine_raster_p.h> #include <private/qmath_p.h> +#include <qstatictext.h> +#include <private/qstatictext_p.h> QT_BEGIN_NAMESPACE @@ -708,13 +711,14 @@ void QPainterPrivate::updateEmulationSpecifier(QPainterState *s) bool penTextureAlpha = false; if (penBrush.style() == Qt::TexturePattern) penTextureAlpha = qHasPixmapTexture(penBrush) - ? penBrush.texture().hasAlpha() + ? (penBrush.texture().depth() > 1) && penBrush.texture().hasAlpha() : penBrush.textureImage().hasAlphaChannel(); bool brushTextureAlpha = false; - if (s->brush.style() == Qt::TexturePattern) + if (s->brush.style() == Qt::TexturePattern) { brushTextureAlpha = qHasPixmapTexture(s->brush) - ? s->brush.texture().hasAlpha() + ? (s->brush.texture().depth() > 1) && s->brush.texture().hasAlpha() : s->brush.textureImage().hasAlphaChannel(); + } if (((penBrush.style() == Qt::TexturePattern && penTextureAlpha) || (s->brush.style() == Qt::TexturePattern && brushTextureAlpha)) && !engine->hasFeature(QPaintEngine::MaskedBrush)) @@ -1986,12 +1990,25 @@ QPaintEngine *QPainter::paintEngine() const endNativePainting(). Note that only the states the underlying paint engine changes will be reset - to their respective default states. If, for example, the OpenGL polygon - mode is changed by the user inside a beginNativePaint()/endNativePainting() - block, it will not be reset to the default state by endNativePainting(). + to their respective default states. The states we reset may change from + release to release. The following states are currently reset in the OpenGL + 2 engine: + + \list + \i blending is disabled + \i the depth, stencil and scissor tests are disabled + \i the active texture unit is reset to 0 + \i the depth mask, depth function and the clear depth are reset to their + default values + \i the stencil mask, stencil operation and stencil function are reset to + their default values + \i the current color is reset to solid white + \endlist - Here is an example that shows intermixing of painter commands - and raw OpenGL commands: + If, for example, the OpenGL polygon mode is changed by the user inside a + beginNativePaint()/endNativePainting() block, it will not be reset to the + default state by endNativePainting(). Here is an example that shows + intermixing of painter commands and raw OpenGL commands: \snippet doc/src/snippets/code/src_gui_painting_qpainter.cpp 21 @@ -5683,6 +5700,78 @@ void QPainter::drawImage(const QRectF &targetRect, const QImage &image, const QR d->engine->drawImage(QRectF(x, y, w, h), image, QRectF(sx, sy, sw, sh), flags); } + +void qt_draw_glyphs(QPainter *painter, const quint32 *glyphArray, const QPointF *positionArray, + int glyphCount) +{ + QPainterPrivate *painter_d = QPainterPrivate::get(painter); + painter_d->drawGlyphs(glyphArray, positionArray, glyphCount); +} + +void QPainterPrivate::drawGlyphs(const quint32 *glyphArray, const QPointF *positionArray, + int glyphCount) +{ + updateState(state); + + QFontEngine *fontEngine = state->font.d->engineForScript(QUnicodeTables::Common); + + QVarLengthArray<QFixedPoint, 128> positions; + for (int i=0; i<glyphCount; ++i) { + QFixedPoint fp = QFixedPoint::fromPointF(positionArray[i]); + positions.append(fp); + } + + if (extended != 0) { + QStaticTextItem staticTextItem; + staticTextItem.color = state->pen.color(); + staticTextItem.font = state->font; + staticTextItem.fontEngine = fontEngine; + staticTextItem.numGlyphs = glyphCount; + staticTextItem.glyphs = reinterpret_cast<glyph_t *>(const_cast<glyph_t *>(glyphArray)); + staticTextItem.glyphPositions = positions.data(); + + extended->drawStaticTextItem(&staticTextItem); + } else { + QTextItemInt textItem; + textItem.f = &state->font; + textItem.fontEngine = fontEngine; + + QVarLengthArray<QFixed, 128> advances(glyphCount); + QVarLengthArray<QGlyphJustification, 128> glyphJustifications(glyphCount); + QVarLengthArray<HB_GlyphAttributes, 128> glyphAttributes(glyphCount); + qMemSet(glyphAttributes.data(), 0, glyphAttributes.size() * sizeof(HB_GlyphAttributes)); + qMemSet(advances.data(), 0, advances.size() * sizeof(QFixed)); + qMemSet(glyphJustifications.data(), 0, glyphJustifications.size() * sizeof(QGlyphJustification)); + + textItem.glyphs.numGlyphs = glyphCount; + textItem.glyphs.glyphs = reinterpret_cast<HB_Glyph *>(const_cast<quint32 *>(glyphArray)); + textItem.glyphs.offsets = positions.data(); + textItem.glyphs.advances_x = advances.data(); + textItem.glyphs.advances_y = advances.data(); + textItem.glyphs.justifications = glyphJustifications.data(); + textItem.glyphs.attributes = glyphAttributes.data(); + + engine->drawTextItem(QPointF(0, 0), textItem); + } +} + +/*! + + \fn void QPainter::drawStaticText(const QPoint &position, const QStaticText &staticText) + + \since 4.7 + + \overload +*/ + +/*! + \fn void QPainter::drawStaticText(int x, int y, const QStaticText &staticText) + + \since 4.7 + + \overload +*/ + /*! \fn void QPainter::drawText(const QPointF &position, const QString &text) @@ -5706,6 +5795,124 @@ void QPainter::drawText(const QPointF &p, const QString &str) } /*! + \since 4.7 + + Draws the given \a staticText at the given \a position. + + The text will be drawn using the font and the transformation set on the painter. If the + font and/or transformation set on the painter are different from the ones used to initialize + the layout of the QStaticText, then the layout will have to be recalculated. Use + QStaticText::prepare() to initialize \a staticText with the font and transformation with which + it will later be drawn. + + If \a position is not the same as when \a staticText was initialized, or when it was last drawn, + then there will be a slight overhead when translating the text to its new position. + + \note If the painter's transformation is not affine, then \a staticText will be drawn using regular + calls to drawText(), losing any potential performance improvement. + + \sa QStaticText +*/ +void QPainter::drawStaticText(const QPointF &position, const QStaticText &staticText) +{ + Q_D(QPainter); + if (!d->engine || staticText.text().isEmpty() || pen().style() == Qt::NoPen) + return; + + QStaticTextPrivate *staticText_d = + const_cast<QStaticTextPrivate *>(QStaticTextPrivate::get(&staticText)); + + // If we don't have an extended paint engine, or if the painter is projected, + // we go through standard code path + if (d->extended == 0 || !d->state->matrix.isAffine()) { + staticText_d->paintText(position, this); + return; + } + + // Don't recalculate entire layout because of translation, rather add the dx and dy + // into the position to move each text item the correct distance. + QPointF transformedPosition = position * d->state->matrix; + QTransform matrix = d->state->matrix; + + // The translation has been applied to transformedPosition. Remove translation + // component from matrix. + if (d->state->matrix.isTranslating()) { + qreal m11 = d->state->matrix.m11(); + qreal m12 = d->state->matrix.m12(); + qreal m13 = d->state->matrix.m13(); + qreal m21 = d->state->matrix.m21(); + qreal m22 = d->state->matrix.m22(); + qreal m23 = d->state->matrix.m23(); + qreal m33 = d->state->matrix.m33(); + + d->state->matrix.setMatrix(m11, m12, m13, + m21, m22, m23, + 0.0, 0.0, m33); + } + + // If the transform is not identical to the text transform, + // we have to relayout the text (for other transformations than plain translation) + bool staticTextNeedsReinit = false; + if (staticText_d->matrix != d->state->matrix) { + staticText_d->matrix = d->state->matrix; + staticTextNeedsReinit = true; + } + + bool restoreWhenFinished = false; + if (staticText_d->needsClipRect) { + save(); + setClipRect(QRectF(position, staticText_d->maximumSize)); + + restoreWhenFinished = true; + } + + if (font() != staticText_d->font) { + staticText_d->font = font(); + staticTextNeedsReinit = true; + } + + // Recreate the layout of the static text because the matrix or font has changed + if (staticTextNeedsReinit) + staticText_d->init(); + + if (transformedPosition != staticText_d->position) { // Translate to actual position + QFixed fx = QFixed::fromReal(transformedPosition.x()); + QFixed fy = QFixed::fromReal(transformedPosition.y()); + QFixed oldX = QFixed::fromReal(staticText_d->position.x()); + QFixed oldY = QFixed::fromReal(staticText_d->position.y()); + for (int item=0; item<staticText_d->itemCount;++item) { + QStaticTextItem *textItem = staticText_d->items + item; + for (int i=0; i<textItem->numGlyphs; ++i) { + textItem->glyphPositions[i].x += fx - oldX; + textItem->glyphPositions[i].y += fy - oldY; + } + textItem->userDataNeedsUpdate = true; + } + + staticText_d->position = transformedPosition; + } + + QPen oldPen = d->state->pen; + QColor currentColor = oldPen.color(); + for (int i=0; i<staticText_d->itemCount; ++i) { + QStaticTextItem *item = staticText_d->items + i; + if (currentColor != item->color) { + setPen(item->color); + currentColor = item->color; + } + d->extended->drawStaticTextItem(item); + } + if (currentColor != oldPen.color()) + setPen(oldPen); + + if (restoreWhenFinished) + restore(); + + if (matrix.isTranslating()) + d->state->matrix = matrix; +} + +/*! \internal */ void QPainter::drawText(const QPointF &p, const QString &str, int tf, int justificationPadding) @@ -8695,6 +8902,160 @@ QTransform QPainter::combinedTransform() const return d->state->worldMatrix * d->viewTransform(); } +/*! + \since 4.7 + + This function is used to draw \a pixmap, or a sub-rectangle of \a pixmap, + at multiple positions with different scale, rotation and opacity. \a + fragments is an array of \a fragmentCount elements specifying the + parameters used to draw each pixmap fragment. The \a hints + parameter can be used to pass in drawing hints. + + This function is potentially faster than multiple calls to drawPixmap(), + since the backend can optimize state changes. + + \sa QPainter::Fragment, QPainter::FragmentHint +*/ + +void QPainter::drawPixmapFragments(const Fragment *fragments, int fragmentCount, + const QPixmap &pixmap, FragmentHints hints) +{ + Q_D(QPainter); + + if (!d->engine) + return; + + if (d->engine->isExtended()) { + d->extended->drawPixmapFragments(fragments, fragmentCount, pixmap, hints); + } else { + qreal oldOpacity = opacity(); + QTransform oldTransform = transform(); + + for (int i = 0; i < fragmentCount; ++i) { + QTransform transform = oldTransform; + transform.translate(fragments[i].x, fragments[i].y); + transform.rotate(fragments[i].rotation); + setOpacity(oldOpacity * fragments[i].opacity); + setTransform(transform); + + qreal w = fragments[i].scaleX * fragments[i].width; + qreal h = fragments[i].scaleY * fragments[i].height; + QRectF sourceRect(fragments[i].sourceLeft, fragments[i].sourceTop, + fragments[i].width, fragments[i].height); + drawPixmap(QRectF(-0.5 * w, -0.5 * h, w, h), pixmap, sourceRect); + } + + setOpacity(oldOpacity); + setTransform(oldTransform); + } +} + +/*! + \since 4.7 + \class QPainter::Fragment + + \brief This class is used in conjunction with the + QPainter::drawPixmapFragments() function to specify how a pixmap, or + sub-rect of a pixmap, is drawn. + + The \a sourceLeft, \a sourceTop, \a width and \a height variables are used + as a source rectangle within the pixmap passed into the + QPainter::drawPixmapFragments() function. The variables \a x, \a y, \a + width and \a height are used to calculate the target rectangle that is + drawn. \a x and \a y denotes the center of the target rectangle. The \a + width and \a heigth in the target rectangle is scaled by the \a scaleX and + \a scaleY values. The resulting target rectangle is then rotated \a + rotation degrees around the \a x, \a y center point. + + \sa QPainter::drawPixmapFragments() +*/ + +/*! + \since 4.7 + + This is a convenience function that returns a QPainter::Fragment that is + initialized with the \a pos, \a sourceRect, \a scaleX, \a scaleY, \a + rotation, \a opacity parameters. +*/ + +QPainter::Fragment QPainter::Fragment::create(const QPointF &pos, const QRectF &sourceRect, + qreal scaleX, qreal scaleY, qreal rotation, + qreal opacity) +{ + Fragment fragment = {pos.x(), pos.y(), sourceRect.x(), sourceRect.y(), sourceRect.width(), + sourceRect.height(), scaleX, scaleY, rotation, opacity}; + return fragment; +} + +/*! + \variable QPainter::Fragment::x + \brief the x coordinate of center point in the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::y + \brief the y coordinate of the center point in the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::sourceLeft + \brief the left coordinate of the source rectangle. +*/ + +/*! + \variable QPainter::Fragment::sourceTop + \brief the top coordinate of the source rectangle. +*/ + +/*! + \variable QPainter::Fragment::width + + \brief the width of the source rectangle and is used to calculate the width + of the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::height + + \brief the height of the source rectangle and is used to calculate the + height of the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::scaleX + \brief the horizontal scale of the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::scaleY + \brief the vertical scale of the target rectangle. +*/ + +/*! + \variable QPainter::Fragment::rotation + + \brief the rotation of the target rectangle in degrees. The target + rectangle is rotated after it has been scaled. +*/ + +/*! + \variable QPainter::Fragment::opacity + + \brief the opacity of the target rectangle, where 0.0 is fully transparent + and 1.0 is fully opaque. +*/ + +/*! + \since 4.7 + + \enum QPainter::FragmentHint + + \value OpaqueHint Indicates that the pixmap fragments to be drawn are + opaque. Opaque fragments are potentially faster to draw. + + \sa QPainter::drawPixmapFragments(), QPainter::Fragment +*/ + void qt_draw_helper(QPainterPrivate *p, const QPainterPath &path, QPainterPrivate::DrawOperation operation) { p->draw_helper(path, operation); |