示例#1
0
void hist_impl::render(const void* pWnd, int pX, int pY, int pVPW, int pVPH)
{
    float w = float(pVPW - (leftMargin()+rightMargin()+tickSize()));
    float h = float(pVPH - (bottomMargin()+topMargin()+tickSize()));
    float offset_x = (2.0f * (leftMargin()+tickSize()) + (w - pVPW)) / pVPW;
    float offset_y = (2.0f * (bottomMargin()+tickSize()) + (h - pVPH)) / pVPH;
    float scale_x = w / pVPW;
    float scale_y = h / pVPH;

    CheckGL("Begin Histogram::render");
    /* Enavle scissor test to discard anything drawn beyond viewport.
     * Set scissor rectangle to clip fragments outside of viewport */
    glScissor(pX+leftMargin()+tickSize(), pY+bottomMargin()+tickSize(),
            pVPW - (leftMargin()+rightMargin()+tickSize()),
            pVPH - (bottomMargin()+topMargin()+tickSize()));
    glEnable(GL_SCISSOR_TEST);

    glm::mat4 trans = glm::translate(glm::scale(glm::mat4(1),
                                                glm::vec3(scale_x, scale_y, 1)),
                                     glm::vec3(offset_x, offset_y, 0));

    glUseProgram(mHistBarProgram);
    glUniformMatrix4fv(mHistBarMatIndex, 1, GL_FALSE, glm::value_ptr(trans));
    glUniform4fv(mHistBarColorIndex, 1, mBarColor);
    glUniform1f(mHistBarNBinsIndex, (GLfloat)mNBins);
    glUniform1f(mHistBarYMaxIndex, ymax());

    /* render a rectangle for each bin. Same
     * rectangle is scaled and translated accordingly
     * for each bin. This is done by OpenGL feature of
     * instanced rendering */
    bindResources(pWnd);
    glDrawArraysInstanced(GL_TRIANGLE_FAN, 0, 4, mNBins);
    unbindResources();

    glUseProgram(0);
    /* Stop clipping */
    glDisable(GL_SCISSOR_TEST);

    renderChart(pWnd, pX, pY, pVPW, pVPH);
    CheckGL("End Histogram::render");
}
示例#2
0
 double height() const { return ymax() - ymin(); };
示例#3
0
 nervana::boundingbox::box unnormalize(float width, float height)
 {
     return nervana::boundingbox::box(
         xmin() * width, ymin() * height, xmax() * width - 1, ymax() * height - 1);
 }
示例#4
0
QRectF QTessellatorPrivate::collectAndSortVertices(const QPointF *points, int *maxActiveEdges)
{
    *maxActiveEdges = 0;
    Vertex *v = vertices.storage;
    Vertex **vv = vertices.sorted;

    qreal xmin(points[0].x());
    qreal xmax(points[0].x());
    qreal ymin(points[0].y());
    qreal ymax(points[0].y());

    // collect vertex data
    Q27Dot5 y_prev = FloatToQ27Dot5(points[vertices.nPoints-1].y());
    Q27Dot5 x_next = FloatToQ27Dot5(points[0].x());
    Q27Dot5 y_next = FloatToQ27Dot5(points[0].y());
    int j = 0;
    int i = 0;
    while (i < vertices.nPoints) {
        Q27Dot5 y_curr = y_next;

        *vv = v;

        v->x = x_next;
        v->y = y_next;
        v->flags = 0;

    next_point:

        xmin = qMin(xmin, points[i+1].x());
        xmax = qMax(xmax, points[i+1].x());
        ymin = qMin(ymin, points[i+1].y());
        ymax = qMax(ymax, points[i+1].y());

        y_next = FloatToQ27Dot5(points[i+1].y());
        x_next = FloatToQ27Dot5(points[i+1].x());

        // skip vertices on top of each other
        if (v->x == x_next && v->y == y_next) {
            ++i;
            if (i < vertices.nPoints)
                goto next_point;
            Vertex *v0 = vertices.storage;
            v0->flags &= ~(LineBeforeStarts|LineBeforeEnds|LineBeforeHorizontal);
            if (y_prev < y_curr)
                v0->flags |= LineBeforeEnds;
            else if (y_prev > y_curr)
                v0->flags |= LineBeforeStarts;
            else
                v0->flags |= LineBeforeHorizontal;
            if ((v0->flags & (LineBeforeStarts|LineAfterStarts))
                && !(v0->flags & (LineAfterEnds|LineBeforeEnds)))
                *maxActiveEdges += 2;
            break;
        }

        if (y_prev < y_curr)
            v->flags |= LineBeforeEnds;
        else if (y_prev > y_curr)
            v->flags |= LineBeforeStarts;
        else
            v->flags |= LineBeforeHorizontal;


        if (y_curr < y_next)
            v->flags |= LineAfterStarts;
        else if (y_curr > y_next)
            v->flags |= LineAfterEnds;
        else
            v->flags |= LineAfterHorizontal;
        // ### could probably get better limit by looping over sorted list and counting down on ending edges
        if ((v->flags & (LineBeforeStarts|LineAfterStarts))
            && !(v->flags & (LineAfterEnds|LineBeforeEnds)))
            *maxActiveEdges += 2;
        y_prev = y_curr;
        ++v;
        ++vv;
        ++j;
        ++i;
    }
    vertices.nPoints = j;

    QDEBUG() << "maxActiveEdges=" << *maxActiveEdges;
    vv = vertices.sorted;
    qSort(vv, vv + vertices.nPoints, compareVertex);

    return QRectF(xmin, ymin, xmax-xmin, ymax-ymin);
}
示例#5
0
void old_tesselate_polygon(QVector<XTrapezoid> *traps, const QPointF *pg, int pgSize,
                           bool winding)
{
    QVector<QEdge> edges;
    edges.reserve(128);
    qreal ymin(INT_MAX/256);
    qreal ymax(INT_MIN/256);

    //painter.begin(pg, pgSize);
    if (pg[0] != pg[pgSize-1])
        qWarning() << Q_FUNC_INFO << "Malformed polygon (first and last points must be identical)";
    // generate edge table
//     qDebug() << "POINTS:";
    for (int x = 0; x < pgSize-1; ++x) {
	QEdge edge;
        QPointF p1(Q27Dot5ToDouble(FloatToQ27Dot5(pg[x].x())),
                   Q27Dot5ToDouble(FloatToQ27Dot5(pg[x].y())));
        QPointF p2(Q27Dot5ToDouble(FloatToQ27Dot5(pg[x+1].x())),
                   Q27Dot5ToDouble(FloatToQ27Dot5(pg[x+1].y())));

//         qDebug() << "    "
//                  << p1;
	edge.winding = p1.y() > p2.y() ? 1 : -1;
	if (edge.winding > 0)
            qSwap(p1, p2);
        edge.p1.x = XDoubleToFixed(p1.x());
        edge.p1.y = XDoubleToFixed(p1.y());
        edge.p2.x = XDoubleToFixed(p2.x());
        edge.p2.y = XDoubleToFixed(p2.y());

	edge.m = (p1.y() - p2.y()) / (p1.x() - p2.x()); // line derivative
	edge.b = p1.y() - edge.m * p1.x(); // intersection with y axis
	edge.m = edge.m != 0.0 ? 1.0 / edge.m : 0.0; // inverted derivative
	edges.append(edge);
        ymin = qMin(ymin, qreal(XFixedToDouble(edge.p1.y)));
        ymax = qMax(ymax, qreal(XFixedToDouble(edge.p2.y)));
    }

    QList<const QEdge *> et; 	    // edge list
    for (int i = 0; i < edges.size(); ++i)
        et.append(&edges.at(i));

    // sort edge table by min y value
    qSort(et.begin(), et.end(), compareEdges);

    // eliminate shared edges
    for (int i = 0; i < et.size(); ++i) {
	for (int k = i+1; k < et.size(); ++k) {
            const QEdge *edgeI = et.at(i);
            const QEdge *edgeK = et.at(k);
            if (edgeK->p1.y > edgeI->p1.y)
                break;
   	    if (edgeI->winding != edgeK->winding &&
                isEqual(edgeI->p1, edgeK->p1) && isEqual(edgeI->p2, edgeK->p2)
		) {
 		et.removeAt(k);
		et.removeAt(i);
		--i;
		break;
	    }
	}
    }

    if (ymax <= ymin)
	return;
    QList<const QEdge *> aet; 	    // edges that intersects the current scanline

//     if (ymin < 0)
// 	ymin = 0;
//     if (paintEventClipRegion) // don't scan more lines than we have to
// 	ymax = paintEventClipRegion->boundingRect().height();

#ifdef QT_DEBUG_TESSELATOR
    qDebug("==> ymin = %f, ymax = %f", ymin, ymax);
#endif // QT_DEBUG_TESSELATOR

    currentY = ymin; // used by the less than op
    for (qreal y = ymin; y < ymax;) {
	// fill active edge table with edges that intersect the current line
	for (int i = 0; i < et.size(); ++i) {
            const QEdge *edge = et.at(i);
            if (edge->p1.y > XDoubleToFixed(y))
                break;
            aet.append(edge);
            et.removeAt(i);
            --i;
	}

	// remove processed edges from active edge table
	for (int i = 0; i < aet.size(); ++i) {
	    if (aet.at(i)->p2.y <= XDoubleToFixed(y)) {
		aet.removeAt(i);
 		--i;
	    }
	}
        if (aet.size()%2 != 0) {
#ifndef QT_NO_DEBUG
            qWarning("QX11PaintEngine: aet out of sync - this should not happen.");
#endif
            return;
        }

	// done?
	if (!aet.size()) {
            if (!et.size()) {
                break;
	    } else {
 		y = currentY = XFixedToDouble(et.at(0)->p1.y);
                continue;
	    }
        }

        // calculate the next y where we have to start a new set of trapezoids
	qreal next_y(INT_MAX/256);
 	for (int i = 0; i < aet.size(); ++i) {
            const QEdge *edge = aet.at(i);
 	    if (XFixedToDouble(edge->p2.y) < next_y)
 		next_y = XFixedToDouble(edge->p2.y);
        }

	if (et.size() && next_y > XFixedToDouble(et.at(0)->p1.y))
	    next_y = XFixedToDouble(et.at(0)->p1.y);

        int aetSize = aet.size();
	for (int i = 0; i < aetSize; ++i) {
	    for (int k = i+1; k < aetSize; ++k) {
                const QEdge *edgeI = aet.at(i);
                const QEdge *edgeK = aet.at(k);
		qreal m1 = edgeI->m;
		qreal b1 = edgeI->b;
		qreal m2 = edgeK->m;
		qreal b2 = edgeK->b;

		if (qAbs(m1 - m2) < 0.001)
                    continue;

                // ### intersect is not calculated correctly when optimized with -O2 (gcc)
                volatile qreal intersect = 0;
                if (!qIsFinite(b1))
                    intersect = (1.f / m2) * XFixedToDouble(edgeI->p1.x) + b2;
                else if (!qIsFinite(b2))
                    intersect = (1.f / m1) * XFixedToDouble(edgeK->p1.x) + b1;
                else
                    intersect = (b1*m1 - b2*m2) / (m1 - m2);

 		if (intersect > y && intersect < next_y)
		    next_y = intersect;
	    }
	}

        XFixed yf, next_yf;
        yf = qrealToXFixed(y);
        next_yf = qrealToXFixed(next_y);

        if (yf == next_yf) {
            y = currentY = next_y;
            continue;
        }

#ifdef QT_DEBUG_TESSELATOR
        qDebug("###> y = %f, next_y = %f, %d active edges", y, next_y, aet.size());
        qDebug("===> edges");
        dump_edges(et);
        qDebug("===> active edges");
        dump_edges(aet);
#endif
	// calc intersection points
 	QVarLengthArray<QIntersectionPoint> isects(aet.size()+1);
 	for (int i = 0; i < isects.size()-1; ++i) {
            const QEdge *edge = aet.at(i);
 	    isects[i].x = (edge->p1.x != edge->p2.x) ?
			  ((y - edge->b)*edge->m) : XFixedToDouble(edge->p1.x);
	    isects[i].edge = edge;
	}

	if (isects.size()%2 != 1)
	    qFatal("%s: number of intersection points must be odd", Q_FUNC_INFO);

	// sort intersection points
 	qSort(&isects[0], &isects[isects.size()-1], compareIntersections);
//         qDebug() << "INTERSECTION_POINTS:";
//  	for (int i = 0; i < isects.size(); ++i)
//             qDebug() << isects[i].edge << isects[i].x;

        if (winding) {
            // winding fill rule
            for (int i = 0; i < isects.size()-1;) {
                int winding = 0;
                const QEdge *left = isects[i].edge;
                const QEdge *right = 0;
                winding += isects[i].edge->winding;
                for (++i; i < isects.size()-1 && winding != 0; ++i) {
                    winding += isects[i].edge->winding;
                    right = isects[i].edge;
                }
                if (!left || !right)
                    break;
                //painter.addTrapezoid(&toXTrapezoid(yf, next_yf, *left, *right));
                traps->append(toXTrapezoid(yf, next_yf, *left, *right));
            }
        } else {
            // odd-even fill rule
            for (int i = 0; i < isects.size()-2; i += 2) {
                //painter.addTrapezoid(&toXTrapezoid(yf, next_yf, *isects[i].edge, *isects[i+1].edge));
                traps->append(toXTrapezoid(yf, next_yf, *isects[i].edge, *isects[i+1].edge));
            }
        }
	y = currentY = next_y;
    }

#ifdef QT_DEBUG_TESSELATOR
    qDebug("==> number of trapezoids: %d - edge table size: %d\n", traps->size(), et.size());

    for (int i = 0; i < traps->size(); ++i)
        dump_trap(traps->at(i));
#endif

    // optimize by unifying trapezoids that share left/right lines
    // and have a common top/bottom edge
//     for (int i = 0; i < tps.size(); ++i) {
// 	for (int k = i+1; k < tps.size(); ++k) {
// 	    if (i != k && tps.at(i).right == tps.at(k).right
// 		&& tps.at(i).left == tps.at(k).left
// 		&& (tps.at(i).top == tps.at(k).bottom
// 		    || tps.at(i).bottom == tps.at(k).top))
// 	    {
// 		tps[i].bottom = tps.at(k).bottom;
// 		tps.removeAt(k);
//                 i = 0;
// 		break;
// 	    }
// 	}
//     }
    //static int i = 0;
    //QImage img = painter.end();
    //img.save(QString("res%1.png").arg(i++), "PNG");
}
示例#6
0
int QDeclarativePinch::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
    _id = QObject::qt_metacall(_c, _id, _a);
    if (_id < 0)
        return _id;
    if (_c == QMetaObject::InvokeMetaMethod) {
        if (_id < 11)
            qt_static_metacall(this, _c, _id, _a);
        _id -= 11;
    }
#ifndef QT_NO_PROPERTIES
      else if (_c == QMetaObject::ReadProperty) {
        void *_v = _a[0];
        switch (_id) {
        case 0: *reinterpret_cast< QGraphicsObject**>(_v) = target(); break;
        case 1: *reinterpret_cast< qreal*>(_v) = minimumScale(); break;
        case 2: *reinterpret_cast< qreal*>(_v) = maximumScale(); break;
        case 3: *reinterpret_cast< qreal*>(_v) = minimumRotation(); break;
        case 4: *reinterpret_cast< qreal*>(_v) = maximumRotation(); break;
        case 5: *reinterpret_cast< Axis*>(_v) = axis(); break;
        case 6: *reinterpret_cast< qreal*>(_v) = xmin(); break;
        case 7: *reinterpret_cast< qreal*>(_v) = xmax(); break;
        case 8: *reinterpret_cast< qreal*>(_v) = ymin(); break;
        case 9: *reinterpret_cast< qreal*>(_v) = ymax(); break;
        case 10: *reinterpret_cast< bool*>(_v) = active(); break;
        }
        _id -= 11;
    } else if (_c == QMetaObject::WriteProperty) {
        void *_v = _a[0];
        switch (_id) {
        case 0: setTarget(*reinterpret_cast< QGraphicsObject**>(_v)); break;
        case 1: setMinimumScale(*reinterpret_cast< qreal*>(_v)); break;
        case 2: setMaximumScale(*reinterpret_cast< qreal*>(_v)); break;
        case 3: setMinimumRotation(*reinterpret_cast< qreal*>(_v)); break;
        case 4: setMaximumRotation(*reinterpret_cast< qreal*>(_v)); break;
        case 5: setAxis(*reinterpret_cast< Axis*>(_v)); break;
        case 6: setXmin(*reinterpret_cast< qreal*>(_v)); break;
        case 7: setXmax(*reinterpret_cast< qreal*>(_v)); break;
        case 8: setYmin(*reinterpret_cast< qreal*>(_v)); break;
        case 9: setYmax(*reinterpret_cast< qreal*>(_v)); break;
        }
        _id -= 11;
    } else if (_c == QMetaObject::ResetProperty) {
        switch (_id) {
        case 0: resetTarget(); break;
        }
        _id -= 11;
    } else if (_c == QMetaObject::QueryPropertyDesignable) {
        _id -= 11;
    } else if (_c == QMetaObject::QueryPropertyScriptable) {
        _id -= 11;
    } else if (_c == QMetaObject::QueryPropertyStored) {
        _id -= 11;
    } else if (_c == QMetaObject::QueryPropertyEditable) {
        _id -= 11;
    } else if (_c == QMetaObject::QueryPropertyUser) {
        _id -= 11;
    }
#endif // QT_NO_PROPERTIES
    return _id;
}
示例#7
0
void Nhdc12832::setpixel(unsigned int x, unsigned int y){
	if( (x <= xmax()) && (y <= ymax()) ){
		nhd_mem[x][y/8] |= mask[7-(y&0x07)];
	}
}