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Diffstat (limited to 'src/quick/items/qquickpathitemgenericrenderer.cpp')
| -rw-r--r-- | src/quick/items/qquickpathitemgenericrenderer.cpp | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/src/quick/items/qquickpathitemgenericrenderer.cpp b/src/quick/items/qquickpathitemgenericrenderer.cpp new file mode 100644 index 0000000000..9bd03c0e51 --- /dev/null +++ b/src/quick/items/qquickpathitemgenericrenderer.cpp @@ -0,0 +1,510 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qquickpathitemgenericrenderer_p.h" +#include <QtGui/private/qtriangulator_p.h> +#include <QSGVertexColorMaterial> + +QT_BEGIN_NAMESPACE + +static const qreal SCALE = 100; + +struct ColoredVertex // must match QSGGeometry::ColoredPoint2D +{ + float x, y; + QQuickPathItemGenericRenderer::Color4ub color; + void set(float nx, float ny, QQuickPathItemGenericRenderer::Color4ub ncolor) + { + x = nx; y = ny; color = ncolor; + } +}; + +static inline QQuickPathItemGenericRenderer::Color4ub colorToColor4ub(const QColor &c) +{ + QQuickPathItemGenericRenderer::Color4ub color = { + uchar(qRound(c.redF() * c.alphaF() * 255)), + uchar(qRound(c.greenF() * c.alphaF() * 255)), + uchar(qRound(c.blueF() * c.alphaF() * 255)), + uchar(qRound(c.alphaF() * 255)) + }; + return color; +} + +QQuickPathItemGenericRootRenderNode::QQuickPathItemGenericRootRenderNode(QQuickWindow *window, + bool hasFill, + bool hasStroke) + : m_fillNode(nullptr), + m_strokeNode(nullptr) +{ + if (hasFill) { + m_fillNode = new QQuickPathItemGenericRenderNode(window, this); + appendChildNode(m_fillNode); + } + if (hasStroke) { + m_strokeNode = new QQuickPathItemGenericRenderNode(window, this); + appendChildNode(m_strokeNode); + } +} + +QQuickPathItemGenericRootRenderNode::~QQuickPathItemGenericRootRenderNode() +{ +} + +QQuickPathItemGenericRenderNode::QQuickPathItemGenericRenderNode(QQuickWindow *window, + QQuickPathItemGenericRootRenderNode *rootNode) + : m_geometry(QSGGeometry::defaultAttributes_ColoredPoint2D(), 0, 0), + m_window(window), + m_rootNode(rootNode), + m_material(nullptr) +{ + setGeometry(&m_geometry); + activateMaterial(MatSolidColor); +} + +QQuickPathItemGenericRenderNode::~QQuickPathItemGenericRenderNode() +{ +} + +void QQuickPathItemGenericRenderNode::activateMaterial(Material m) +{ + switch (m) { + case MatSolidColor: + // Use vertexcolor material. Items with different colors remain batchable + // this way, at the expense of having to provide per-vertex color values. + if (!m_solidColorMaterial) + m_solidColorMaterial.reset(QQuickPathItemGenericMaterialFactory::createVertexColor(m_window)); + m_material = m_solidColorMaterial.data(); + break; + case MatLinearGradient: + if (!m_linearGradientMaterial) + m_linearGradientMaterial.reset(QQuickPathItemGenericMaterialFactory::createLinearGradient(m_window, this)); + m_material = m_linearGradientMaterial.data(); + break; + default: + qWarning("Unknown material %d", m); + return; + } + + if (material() != m_material) + setMaterial(m_material); +} + +// sync, and so triangulation too, happens on the gui thread +void QQuickPathItemGenericRenderer::beginSync() +{ + m_syncDirty = 0; +} + +void QQuickPathItemGenericRenderer::setPath(const QQuickPath *path) +{ + m_path = path ? path->path() : QPainterPath(); + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setStrokeColor(const QColor &color) +{ + m_strokeColor = colorToColor4ub(color); + m_syncDirty |= DirtyColor; +} + +void QQuickPathItemGenericRenderer::setStrokeWidth(qreal w) +{ + m_pen.setWidthF(w); + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setFillColor(const QColor &color) +{ + m_fillColor = colorToColor4ub(color); + m_syncDirty |= DirtyColor; +} + +void QQuickPathItemGenericRenderer::setFillRule(QQuickPathItem::FillRule fillRule) +{ + m_fillRule = Qt::FillRule(fillRule); + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setJoinStyle(QQuickPathItem::JoinStyle joinStyle, int miterLimit) +{ + m_pen.setJoinStyle(Qt::PenJoinStyle(joinStyle)); + m_pen.setMiterLimit(miterLimit); + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setCapStyle(QQuickPathItem::CapStyle capStyle) +{ + m_pen.setCapStyle(Qt::PenCapStyle(capStyle)); + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setStrokeStyle(QQuickPathItem::StrokeStyle strokeStyle, + qreal dashOffset, const QVector<qreal> &dashPattern) +{ + m_pen.setStyle(Qt::PenStyle(strokeStyle)); + if (strokeStyle == QQuickPathItem::DashLine) { + m_pen.setDashPattern(dashPattern); + m_pen.setDashOffset(dashOffset); + } + m_syncDirty |= DirtyGeom; +} + +void QQuickPathItemGenericRenderer::setFillGradient(QQuickPathGradient *gradient) +{ + m_fillGradientActive = gradient != nullptr; + if (gradient) { + m_fillGradient.stops = gradient->sortedGradientStops(); + m_fillGradient.spread = gradient->spread(); + if (QQuickPathLinearGradient *g = qobject_cast<QQuickPathLinearGradient *>(gradient)) { + m_fillGradient.start = QPointF(g->x1(), g->y1()); + m_fillGradient.end = QPointF(g->x2(), g->y2()); + } else { + Q_UNREACHABLE(); + } + } + m_syncDirty |= DirtyFillGradient; +} + +void QQuickPathItemGenericRenderer::endSync() +{ + if (!m_syncDirty) + return; + + // Use a shadow dirty flag in order to avoid losing state in case there are + // multiple syncs with different dirty flags before we get to + // updatePathRenderNode() on the render thread (with the gui thread + // blocked). For our purposes here m_syncDirty is still required since + // geometry regeneration must only happen when there was an actual change + // in this particular sync round. + m_effectiveDirty |= m_syncDirty; + + if (m_path.isEmpty()) { + m_fillVertices.clear(); + m_fillIndices.clear(); + m_strokeVertices.clear(); + return; + } + + triangulateFill(); + triangulateStroke(); +} + +void QQuickPathItemGenericRenderer::triangulateFill() +{ + m_path.setFillRule(m_fillRule); + + const QVectorPath &vp = qtVectorPathForPath(m_path); + + QTriangleSet ts = qTriangulate(vp, QTransform::fromScale(SCALE, SCALE)); + const int vertexCount = ts.vertices.count() / 2; // just a qreal vector with x,y hence the / 2 + m_fillVertices.resize(vertexCount); + ColoredVertex *vdst = reinterpret_cast<ColoredVertex *>(m_fillVertices.data()); + const qreal *vsrc = ts.vertices.constData(); + for (int i = 0; i < vertexCount; ++i) + vdst[i].set(vsrc[i * 2] / SCALE, vsrc[i * 2 + 1] / SCALE, m_fillColor); + + m_fillIndices.resize(ts.indices.size()); + quint16 *idst = m_fillIndices.data(); + if (ts.indices.type() == QVertexIndexVector::UnsignedShort) { + memcpy(idst, ts.indices.data(), m_fillIndices.count() * sizeof(quint16)); + } else { + const quint32 *isrc = (const quint32 *) ts.indices.data(); + for (int i = 0; i < m_fillIndices.count(); ++i) + idst[i] = isrc[i]; + } +} + +void QQuickPathItemGenericRenderer::triangulateStroke() +{ + const QVectorPath &vp = qtVectorPathForPath(m_path); + + const QRectF clip(0, 0, m_item->width(), m_item->height()); + const qreal inverseScale = 1.0 / SCALE; + m_stroker.setInvScale(inverseScale); + if (m_pen.style() == Qt::SolidLine) { + m_stroker.process(vp, m_pen, clip, 0); + } else { + m_dashStroker.setInvScale(inverseScale); + m_dashStroker.process(vp, m_pen, clip, 0); + QVectorPath dashStroke(m_dashStroker.points(), m_dashStroker.elementCount(), + m_dashStroker.elementTypes(), 0); + m_stroker.process(dashStroke, m_pen, clip, 0); + } + + if (!m_stroker.vertexCount()) { + m_strokeVertices.clear(); + return; + } + + const int vertexCount = m_stroker.vertexCount() / 2; // just a float vector with x,y hence the / 2 + m_strokeVertices.resize(vertexCount); + ColoredVertex *vdst = reinterpret_cast<ColoredVertex *>(m_strokeVertices.data()); + const float *vsrc = m_stroker.vertices(); + for (int i = 0; i < vertexCount; ++i) + vdst[i].set(vsrc[i * 2], vsrc[i * 2 + 1], m_strokeColor); +} + +void QQuickPathItemGenericRenderer::setRootNode(QQuickPathItemGenericRootRenderNode *rn) +{ + if (m_rootNode != rn) { + m_rootNode = rn; + // Scenegraph nodes can be destroyed and then replaced by new ones over + // time; hence it is important to mark everything dirty for + // updatePathRenderNode(). We can assume the renderer has a full sync + // of the data at this point. + m_effectiveDirty = DirtyAll; + } +} + +// on the render thread with gui blocked +void QQuickPathItemGenericRenderer::updatePathRenderNode() +{ + if (!m_effectiveDirty || !m_rootNode) + return; + + if (m_fillColor.a == 0) { + delete m_rootNode->m_fillNode; + m_rootNode->m_fillNode = nullptr; + } else if (!m_rootNode->m_fillNode) { + m_rootNode->m_fillNode = new QQuickPathItemGenericRenderNode(m_item->window(), m_rootNode); + if (m_rootNode->m_strokeNode) + m_rootNode->removeChildNode(m_rootNode->m_strokeNode); + m_rootNode->appendChildNode(m_rootNode->m_fillNode); + if (m_rootNode->m_strokeNode) + m_rootNode->appendChildNode(m_rootNode->m_strokeNode); + m_effectiveDirty |= DirtyGeom; + } + + if (qFuzzyIsNull(m_pen.widthF()) || m_strokeColor.a == 0) { + delete m_rootNode->m_strokeNode; + m_rootNode->m_strokeNode = nullptr; + } else if (!m_rootNode->m_strokeNode) { + m_rootNode->m_strokeNode = new QQuickPathItemGenericRenderNode(m_item->window(), m_rootNode); + m_rootNode->appendChildNode(m_rootNode->m_strokeNode); + m_effectiveDirty |= DirtyGeom; + } + + updateFillNode(); + updateStrokeNode(); + + m_effectiveDirty = 0; +} + +void QQuickPathItemGenericRenderer::updateFillNode() +{ + if (!m_rootNode->m_fillNode) + return; + + QQuickPathItemGenericRenderNode *n = m_rootNode->m_fillNode; + QSGGeometry *g = &n->m_geometry; + if (m_fillVertices.isEmpty()) { + g->allocate(0, 0); + n->markDirty(QSGNode::DirtyGeometry); + return; + } + + if (m_fillGradientActive) { + n->activateMaterial(QQuickPathItemGenericRenderNode::MatLinearGradient); + if (m_effectiveDirty & DirtyFillGradient) { + // Make a copy of the data that will be accessed by the material on + // the render thread. + n->m_fillGradient = m_fillGradient; + // Gradients are implemented via a texture-based material. + n->markDirty(QSGNode::DirtyMaterial); + // stop here if only the gradient changed; no need to touch the geometry + if (!(m_effectiveDirty & DirtyGeom)) + return; + } + } else { + n->activateMaterial(QQuickPathItemGenericRenderNode::MatSolidColor); + // fast path for updating only color values when no change in vertex positions + if ((m_effectiveDirty & DirtyColor) && !(m_effectiveDirty & DirtyGeom)) { + ColoredVertex *vdst = reinterpret_cast<ColoredVertex *>(g->vertexData()); + for (int i = 0; i < g->vertexCount(); ++i) + vdst[i].set(vdst[i].x, vdst[i].y, m_fillColor); + n->markDirty(QSGNode::DirtyGeometry); + return; + } + } + + g->allocate(m_fillVertices.count(), m_fillIndices.count()); + g->setDrawingMode(QSGGeometry::DrawTriangles); + memcpy(g->vertexData(), m_fillVertices.constData(), g->vertexCount() * g->sizeOfVertex()); + memcpy(g->indexData(), m_fillIndices.constData(), g->indexCount() * g->sizeOfIndex()); + + n->markDirty(QSGNode::DirtyGeometry); +} + +void QQuickPathItemGenericRenderer::updateStrokeNode() +{ + if (!m_rootNode->m_strokeNode) + return; + if (m_effectiveDirty == DirtyFillGradient) // not applicable + return; + + QQuickPathItemGenericRenderNode *n = m_rootNode->m_strokeNode; + n->markDirty(QSGNode::DirtyGeometry); + + QSGGeometry *g = &n->m_geometry; + if (m_strokeVertices.isEmpty()) { + g->allocate(0, 0); + return; + } + + if ((m_effectiveDirty & DirtyColor) && !(m_effectiveDirty & DirtyGeom)) { + ColoredVertex *vdst = reinterpret_cast<ColoredVertex *>(g->vertexData()); + for (int i = 0; i < g->vertexCount(); ++i) + vdst[i].set(vdst[i].x, vdst[i].y, m_strokeColor); + return; + } + + g->allocate(m_strokeVertices.count(), 0); + g->setDrawingMode(QSGGeometry::DrawTriangleStrip); + memcpy(g->vertexData(), m_strokeVertices.constData(), g->vertexCount() * g->sizeOfVertex()); +} + +QSGMaterial *QQuickPathItemGenericMaterialFactory::createVertexColor(QQuickWindow *window) +{ + QSGRendererInterface::GraphicsApi api = window->rendererInterface()->graphicsApi(); + +#ifndef QT_NO_OPENGL + if (api == QSGRendererInterface::OpenGL) // ### so much for "generic"... + return new QSGVertexColorMaterial; +#endif + + qWarning("Vertex-color material: Unsupported graphics API %d", api); + return nullptr; +} + +QSGMaterial *QQuickPathItemGenericMaterialFactory::createLinearGradient(QQuickWindow *window, + QQuickPathItemGenericRenderNode *node) +{ + QSGRendererInterface::GraphicsApi api = window->rendererInterface()->graphicsApi(); + +#ifndef QT_NO_OPENGL + if (api == QSGRendererInterface::OpenGL) // ### so much for "generic"... + return new QQuickPathItemLinearGradientMaterial(node); +#endif + + qWarning("Linear gradient material: Unsupported graphics API %d", api); + return nullptr; +} + +#ifndef QT_NO_OPENGL + +QSGMaterialType QQuickPathItemLinearGradientShader::type; + +QQuickPathItemLinearGradientShader::QQuickPathItemLinearGradientShader() +{ + setShaderSourceFile(QOpenGLShader::Vertex, + QStringLiteral(":/qt-project.org/items/shaders/lineargradient.vert")); + setShaderSourceFile(QOpenGLShader::Fragment, + QStringLiteral(":/qt-project.org/items/shaders/lineargradient.frag")); +} + +void QQuickPathItemLinearGradientShader::initialize() +{ + m_opacityLoc = program()->uniformLocation("opacity"); + m_matrixLoc = program()->uniformLocation("matrix"); + m_gradStartLoc = program()->uniformLocation("gradStart"); + m_gradEndLoc = program()->uniformLocation("gradEnd"); +} + +void QQuickPathItemLinearGradientShader::updateState(const RenderState &state, QSGMaterial *mat, QSGMaterial *) +{ + QQuickPathItemLinearGradientMaterial *m = static_cast<QQuickPathItemLinearGradientMaterial *>(mat); + + if (state.isOpacityDirty()) + program()->setUniformValue(m_opacityLoc, state.opacity()); + + if (state.isMatrixDirty()) + program()->setUniformValue(m_matrixLoc, state.combinedMatrix()); + + QQuickPathItemGenericRenderNode *node = m->node(); + program()->setUniformValue(m_gradStartLoc, QVector2D(node->m_fillGradient.start)); + program()->setUniformValue(m_gradEndLoc, QVector2D(node->m_fillGradient.end)); + + QSGTexture *tx = QQuickPathItemGradientCache::currentCache()->get(node->m_fillGradient); + tx->bind(); +} + +char const *const *QQuickPathItemLinearGradientShader::attributeNames() const +{ + static const char *const attr[] = { "vertexCoord", "vertexColor", nullptr }; + return attr; +} + +int QQuickPathItemLinearGradientMaterial::compare(const QSGMaterial *other) const +{ + Q_ASSERT(other && type() == other->type()); + const QQuickPathItemLinearGradientMaterial *m = static_cast<const QQuickPathItemLinearGradientMaterial *>(other); + + QQuickPathItemGenericRenderNode *a = node(); + QQuickPathItemGenericRenderNode *b = m->node(); + Q_ASSERT(a && b); + if (a == b) + return 0; + + const QQuickPathItemGradientCache::GradientDesc *ga = &a->m_fillGradient; + const QQuickPathItemGradientCache::GradientDesc *gb = &b->m_fillGradient; + if (int d = ga->start.x() - gb->start.x()) + return d; + if (int d = ga->start.y() - gb->start.y()) + return d; + if (int d = ga->end.x() - gb->end.x()) + return d; + if (int d = ga->end.y() - gb->end.y()) + return d; + + if (int d = ga->stops.count() - gb->stops.count()) + return d; + + for (int i = 0; i < ga->stops.count(); ++i) { + if (int d = ga->stops[i].first - gb->stops[i].first) + return d; + if (int d = ga->stops[i].second.rgba() - gb->stops[i].second.rgba()) + return d; + } + + return 0; +} + +#endif // QT_NO_OPENGL + +QT_END_NAMESPACE |