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Diffstat (limited to 'src/declarative/items/qsgshadereffectitem.cpp')
| -rw-r--r-- | src/declarative/items/qsgshadereffectitem.cpp | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/src/declarative/items/qsgshadereffectitem.cpp b/src/declarative/items/qsgshadereffectitem.cpp new file mode 100644 index 0000000000..286b67bacd --- /dev/null +++ b/src/declarative/items/qsgshadereffectitem.cpp @@ -0,0 +1,449 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qsgshadereffectitem_p.h> +#include <private/qsgshadereffectnode_p.h> + +#include "qsgmaterial.h" +#include "qsgitem_p.h" + +#include <private/qsgcontext_p.h> +#include <private/qsgtextureprovider_p.h> +#include "qsgcanvas.h" + +#include <QtCore/qsignalmapper.h> +#include <QtOpenGL/qglframebufferobject.h> + +QT_BEGIN_NAMESPACE + +static const char qt_default_vertex_code[] = + "uniform highp mat4 qt_ModelViewProjectionMatrix; \n" + "attribute highp vec4 qt_Vertex; \n" + "attribute highp vec2 qt_MultiTexCoord0; \n" + "varying highp vec2 qt_TexCoord0; \n" + "void main() { \n" + " qt_TexCoord0 = qt_MultiTexCoord0; \n" + " gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex; \n" + "}"; + +static const char qt_default_fragment_code[] = + "varying highp vec2 qt_TexCoord0; \n" + "uniform sampler2D source; \n" + "uniform lowp float qt_Opacity; \n" + "void main() { \n" + " gl_FragColor = texture2D(source, qt_TexCoord0) * qt_Opacity; \n" + "}"; + +static const char qt_position_attribute_name[] = "qt_Vertex"; +static const char qt_texcoord_attribute_name[] = "qt_MultiTexCoord0"; + +const char *qtPositionAttributeName() +{ + return qt_position_attribute_name; +} + +const char *qtTexCoordAttributeName() +{ + return qt_texcoord_attribute_name; +} + +QSGShaderEffectItem::QSGShaderEffectItem(QSGItem *parent) + : QSGItem(parent) + , m_mesh(0) + , m_cullMode(NoCulling) + , m_blending(true) + , m_dirtyData(true) + , m_programDirty(true) + , m_dirtyMesh(true) + , m_dirtyGeometry(true) +{ + setFlag(QSGItem::ItemHasContents); +} + +QSGShaderEffectItem::~QSGShaderEffectItem() +{ + reset(); +} + +void QSGShaderEffectItem::componentComplete() +{ + updateProperties(); + QSGItem::componentComplete(); +} + +void QSGShaderEffectItem::setFragmentShader(const QByteArray &code) +{ + if (m_source.fragmentCode.constData() == code.constData()) + return; + m_source.fragmentCode = code; + if (isComponentComplete()) { + reset(); + updateProperties(); + } + emit fragmentShaderChanged(); +} + +void QSGShaderEffectItem::setVertexShader(const QByteArray &code) +{ + if (m_source.vertexCode.constData() == code.constData()) + return; + m_source.vertexCode = code; + if (isComponentComplete()) { + reset(); + updateProperties(); + } + emit vertexShaderChanged(); +} + +void QSGShaderEffectItem::setBlending(bool enable) +{ + if (blending() == enable) + return; + + m_blending = enable; + update(); + + emit blendingChanged(); +} + +void QSGShaderEffectItem::setMesh(QSGShaderEffectMesh *mesh) +{ + if (mesh == m_mesh) + return; + if (m_mesh) + disconnect(m_mesh, SIGNAL(geometryChanged()), this, 0); + m_mesh = mesh; + if (m_mesh) + connect(m_mesh, SIGNAL(geometryChanged()), this, SLOT(updateGeometry())); + m_dirtyMesh = true; + update(); + emit meshChanged(); +} + +void QSGShaderEffectItem::setCullMode(CullMode face) +{ + if (face == m_cullMode) + return; + m_cullMode = face; + update(); + emit cullModeChanged(); +} + +void QSGShaderEffectItem::changeSource(int index) +{ + Q_ASSERT(index >= 0 && index < m_sources.size()); + QVariant v = property(m_sources.at(index).name.constData()); + setSource(v, index); +} + +void QSGShaderEffectItem::updateData() +{ + m_dirtyData = true; + update(); +} + +void QSGShaderEffectItem::updateGeometry() +{ + m_dirtyGeometry = true; + update(); +} + +void QSGShaderEffectItem::setSource(const QVariant &var, int index) +{ + Q_ASSERT(index >= 0 && index < m_sources.size()); + + SourceData &source = m_sources[index]; + + source.item = 0; + if (var.isNull()) { + return; + } else if (!qVariantCanConvert<QObject *>(var)) { + qWarning("Could not assign source of type '%s' to property '%s'.", var.typeName(), source.name.constData()); + return; + } + + QObject *obj = qVariantValue<QObject *>(var); + + QSGTextureProvider *int3rface = QSGTextureProvider::from(obj); + if (!int3rface) { + qWarning("Could not assign property '%s', did not implement QSGTextureProvider.", source.name.constData()); + } + + source.item = qobject_cast<QSGItem *>(obj); + + // TODO: Find better solution. + // 'source.item' needs a canvas to get a scenegraph node. + // The easiest way to make sure it gets a canvas is to + // make it a part of the same item tree as 'this'. + if (source.item && source.item->parentItem() == 0) { + source.item->setParentItem(this); + source.item->setVisible(false); + } +} + +void QSGShaderEffectItem::disconnectPropertySignals() +{ + disconnect(this, 0, this, SLOT(updateData())); + for (int i = 0; i < m_sources.size(); ++i) { + SourceData &source = m_sources[i]; + disconnect(this, 0, source.mapper, 0); + disconnect(source.mapper, 0, this, 0); + } +} + +void QSGShaderEffectItem::connectPropertySignals() +{ + QSet<QByteArray>::const_iterator it; + for (it = m_source.uniformNames.begin(); it != m_source.uniformNames.end(); ++it) { + int pi = metaObject()->indexOfProperty(it->constData()); + if (pi >= 0) { + QMetaProperty mp = metaObject()->property(pi); + if (!mp.hasNotifySignal()) + qWarning("QSGShaderEffectItem: property '%s' does not have notification method!", it->constData()); + QByteArray signalName("2"); + signalName.append(mp.notifySignal().signature()); + connect(this, signalName, this, SLOT(updateData())); + } else { + qWarning("QSGShaderEffectItem: '%s' does not have a matching property!", it->constData()); + } + } + for (int i = 0; i < m_sources.size(); ++i) { + SourceData &source = m_sources[i]; + int pi = metaObject()->indexOfProperty(source.name.constData()); + if (pi >= 0) { + QMetaProperty mp = metaObject()->property(pi); + QByteArray signalName("2"); + signalName.append(mp.notifySignal().signature()); + connect(this, signalName, source.mapper, SLOT(map())); + source.mapper->setMapping(this, i); + connect(source.mapper, SIGNAL(mapped(int)), this, SLOT(changeSource(int))); + } else { + qWarning("QSGShaderEffectItem: '%s' does not have a matching source!", source.name.constData()); + } + } +} + +void QSGShaderEffectItem::reset() +{ + disconnectPropertySignals(); + + m_source.attributeNames.clear(); + m_source.uniformNames.clear(); + m_source.respectsOpacity = false; + m_source.respectsMatrix = false; + m_source.className = metaObject()->className(); + + for (int i = 0; i < m_sources.size(); ++i) { + const SourceData &source = m_sources.at(i); + delete source.mapper; + if (source.item && source.item->parentItem() == this) + source.item->setParentItem(0); + } + m_sources.clear(); + + m_programDirty = true; + m_dirtyMesh = true; +} + +void QSGShaderEffectItem::updateProperties() +{ + QByteArray vertexCode = m_source.vertexCode; + QByteArray fragmentCode = m_source.fragmentCode; + if (vertexCode.isEmpty()) + vertexCode = qt_default_vertex_code; + if (fragmentCode.isEmpty()) + fragmentCode = qt_default_fragment_code; + + lookThroughShaderCode(vertexCode); + lookThroughShaderCode(fragmentCode); + + if (!m_mesh && !m_source.attributeNames.contains(qt_position_attribute_name)) + qWarning("QSGShaderEffectItem: Missing reference to \'%s\'.", qt_position_attribute_name); + if (!m_mesh && !m_source.attributeNames.contains(qt_texcoord_attribute_name)) + qWarning("QSGShaderEffectItem: Missing reference to \'%s\'.", qt_texcoord_attribute_name); + if (!m_source.respectsMatrix) + qWarning("QSGShaderEffectItem: Missing reference to \'qt_ModelViewProjectionMatrix\'."); + if (!m_source.respectsOpacity) + qWarning("QSGShaderEffectItem: Missing reference to \'qt_Opacity\'."); + + for (int i = 0; i < m_sources.size(); ++i) { + QVariant v = property(m_sources.at(i).name); + setSource(v, i); + } + + connectPropertySignals(); +} + +void QSGShaderEffectItem::lookThroughShaderCode(const QByteArray &code) +{ + // Regexp for matching attributes and uniforms. + // In human readable form: attribute|uniform [lowp|mediump|highp] <type> <name> + static QRegExp re(QLatin1String("\\b(attribute|uniform)\\b\\s*\\b(?:lowp|mediump|highp)?\\b\\s*\\b(\\w+)\\b\\s*\\b(\\w+)")); + Q_ASSERT(re.isValid()); + + int pos = -1; + + QString wideCode = QString::fromLatin1(code.constData(), code.size()); + + while ((pos = re.indexIn(wideCode, pos + 1)) != -1) { + QByteArray decl = re.cap(1).toLatin1(); // uniform or attribute + QByteArray type = re.cap(2).toLatin1(); // type + QByteArray name = re.cap(3).toLatin1(); // variable name + + if (decl == "attribute") { + m_source.attributeNames.append(name); + } else { + Q_ASSERT(decl == "uniform"); + + if (name == "qt_ModelViewProjectionMatrix") { + m_source.respectsMatrix = true; + } else if (name == "qt_Opacity") { + m_source.respectsOpacity = true; + } else { + m_source.uniformNames.insert(name); + if (type == "sampler2D") { + SourceData d; + d.mapper = new QSignalMapper; + d.name = name; + d.item = 0; + m_sources.append(d); + } + } + } + } +} + +void QSGShaderEffectItem::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) +{ + m_dirtyGeometry = true; + QSGItem::geometryChanged(newGeometry, oldGeometry); +} + +QSGNode *QSGShaderEffectItem::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) +{ + QSGShaderEffectNode *node = static_cast<QSGShaderEffectNode *>(oldNode); + + if (!node) { + node = new QSGShaderEffectNode; + node->setMaterial(&m_material); + m_programDirty = true; + m_dirtyData = true; + m_dirtyGeometry = true; + } + + if (m_dirtyMesh) { + node->setGeometry(0); + m_dirtyMesh = false; + m_dirtyGeometry = true; + } + + if (m_dirtyGeometry) { + node->setFlag(QSGNode::OwnsGeometry, false); + QSGGeometry *geometry = node->geometry(); + QRectF rect(0, 0, width(), height()); + QSGShaderEffectMesh *mesh = m_mesh ? m_mesh : &m_defaultMesh; + + geometry = mesh->updateGeometry(geometry, m_source.attributeNames, rect); + if (!geometry) { + delete node; + return 0; + } + + node->setGeometry(geometry); + node->setFlag(QSGNode::OwnsGeometry, true); + + m_dirtyGeometry = false; + } + + if (m_programDirty) { + QSGShaderEffectProgram s = m_source; + if (s.fragmentCode.isEmpty()) + s.fragmentCode = qt_default_fragment_code; + if (s.vertexCode.isEmpty()) + s.vertexCode = qt_default_vertex_code; + + m_material.setProgramSource(s); + node->markDirty(QSGNode::DirtyMaterial); + m_programDirty = false; + } + + // Update blending + if (bool(m_material.flags() & QSGMaterial::Blending) != m_blending) { + m_material.setFlag(QSGMaterial::Blending, m_blending); + node->markDirty(QSGNode::DirtyMaterial); + } + + if (int(m_material.cullMode()) != int(m_cullMode)) { + m_material.setCullMode(QSGShaderEffectMaterial::CullMode(m_cullMode)); + node->markDirty(QSGNode::DirtyMaterial); + } + + if (m_dirtyData) { + QVector<QPair<QByteArray, QVariant> > values; + QVector<QPair<QByteArray, QPointer<QSGItem> > > textures; + const QVector<QPair<QByteArray, QPointer<QSGItem> > > &oldTextures = m_material.textureProviders(); + + for (QSet<QByteArray>::const_iterator it = m_source.uniformNames.begin(); + it != m_source.uniformNames.end(); ++it) { + values.append(qMakePair(*it, property(*it))); + } + for (int i = 0; i < oldTextures.size(); ++i) { + QSGTextureProvider *oldSource = QSGTextureProvider::from(oldTextures.at(i).second); + if (oldSource && oldSource->textureChangedSignal()) + disconnect(oldTextures.at(i).second, oldSource->textureChangedSignal(), node, SLOT(markDirtyTexture())); + } + for (int i = 0; i < m_sources.size(); ++i) { + const SourceData &source = m_sources.at(i); + textures.append(qMakePair(source.name, source.item)); + QSGTextureProvider *t = QSGTextureProvider::from(source.item); + if (t && t->textureChangedSignal()) + connect(source.item, t->textureChangedSignal(), node, SLOT(markDirtyTexture())); + } + m_material.setUniforms(values); + m_material.setTextureProviders(textures); + node->markDirty(QSGNode::DirtyMaterial); + m_dirtyData = false; + } + + return node; +} + +QT_END_NAMESPACE |