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Diffstat (limited to 'src/declarative/items/qquickshadereffectsource.cpp')
| -rw-r--r-- | src/declarative/items/qquickshadereffectsource.cpp | 921 |
1 files changed, 0 insertions, 921 deletions
diff --git a/src/declarative/items/qquickshadereffectsource.cpp b/src/declarative/items/qquickshadereffectsource.cpp deleted file mode 100644 index 952f240cd3..0000000000 --- a/src/declarative/items/qquickshadereffectsource.cpp +++ /dev/null @@ -1,921 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickshadereffectsource_p.h" - -#include "qquickitem_p.h" -#include "qquickcanvas_p.h" -#include <private/qsgadaptationlayer_p.h> -#include <private/qsgrenderer_p.h> - -#include "qopenglframebufferobject.h" -#include "qmath.h" -#include <private/qsgtexture_p.h> - -QT_BEGIN_NAMESPACE - -DEFINE_BOOL_CONFIG_OPTION(qmlFboOverlay, QML_FBO_OVERLAY) - -class QQuickShaderEffectSourceTextureProvider : public QSGTextureProvider -{ - Q_OBJECT -public: - QQuickShaderEffectSourceTextureProvider() - : sourceTexture(0) - { - } - - QSGTexture *texture() const { - sourceTexture->setMipmapFiltering(mipmapFiltering); - sourceTexture->setFiltering(filtering); - sourceTexture->setHorizontalWrapMode(horizontalWrap); - sourceTexture->setVerticalWrapMode(verticalWrap); - return sourceTexture; - } - - QQuickShaderEffectTexture *sourceTexture; - - QSGTexture::Filtering mipmapFiltering; - QSGTexture::Filtering filtering; - QSGTexture::WrapMode horizontalWrap; - QSGTexture::WrapMode verticalWrap; -}; -#include "qquickshadereffectsource.moc" - - -QQuickShaderEffectSourceNode::QQuickShaderEffectSourceNode() -{ - setFlag(UsePreprocess, true); -} - -void QQuickShaderEffectSourceNode::markDirtyTexture() -{ - markDirty(DirtyMaterial); -} - - -QQuickShaderEffectTexture::QQuickShaderEffectTexture(QQuickItem *shaderSource) - : QSGDynamicTexture() - , m_item(0) - , m_format(GL_RGBA) - , m_shaderSource(shaderSource) - , m_renderer(0) - , m_fbo(0) - , m_secondaryFbo(0) -#ifdef QSG_DEBUG_FBO_OVERLAY - , m_debugOverlay(0) -#endif - , m_context(QQuickItemPrivate::get(shaderSource)->sceneGraphContext()) - , m_mipmap(false) - , m_live(true) - , m_recursive(false) - , m_dirtyTexture(true) - , m_multisamplingSupportChecked(false) - , m_multisampling(false) - , m_grab(false) -{ -} - -QQuickShaderEffectTexture::~QQuickShaderEffectTexture() -{ - if (m_renderer) - disconnect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture())); - delete m_renderer; - delete m_fbo; - delete m_secondaryFbo; -#ifdef QSG_DEBUG_FBO_OVERLAY - delete m_debugOverlay; -#endif -} - -int QQuickShaderEffectTexture::textureId() const -{ - return m_fbo ? m_fbo->texture() : 0; -} - -bool QQuickShaderEffectTexture::hasAlphaChannel() const -{ - return m_format != GL_RGB; -} - -bool QQuickShaderEffectTexture::hasMipmaps() const -{ - return m_mipmap; -} - - -void QQuickShaderEffectTexture::bind() -{ -#ifndef QT_NO_DEBUG - if (!m_recursive && m_fbo && ((m_multisampling && m_secondaryFbo->isBound()) || m_fbo->isBound())) - qWarning("ShaderEffectSource: \'recursive\' must be set to true when rendering recursively."); -#endif - glBindTexture(GL_TEXTURE_2D, m_fbo ? m_fbo->texture() : 0); - updateBindOptions(); -} - -bool QQuickShaderEffectTexture::updateTexture() -{ - if ((m_live || m_grab) && m_dirtyTexture) { - grab(); - m_grab = false; - return true; - } - return false; -} - -void QQuickShaderEffectTexture::setHasMipmaps(bool mipmap) -{ - if (mipmap == m_mipmap) - return; - m_mipmap = mipmap; - if (m_mipmap && m_fbo && !m_fbo->format().mipmap()) - markDirtyTexture(); -} - - -void QQuickShaderEffectTexture::setItem(QSGNode *item) -{ - if (item == m_item) - return; - m_item = item; - markDirtyTexture(); -} - -void QQuickShaderEffectTexture::setRect(const QRectF &rect) -{ - if (rect == m_rect) - return; - m_rect = rect; - markDirtyTexture(); -} - -void QQuickShaderEffectTexture::setSize(const QSize &size) -{ - if (size == m_size) - return; - m_size = size; - markDirtyTexture(); -} - -void QQuickShaderEffectTexture::setFormat(GLenum format) -{ - if (format == m_format) - return; - m_format = format; - markDirtyTexture(); -} - -void QQuickShaderEffectTexture::setLive(bool live) -{ - if (live == m_live) - return; - m_live = live; - markDirtyTexture(); -} - -void QQuickShaderEffectTexture::scheduleUpdate() -{ - if (m_grab) - return; - m_grab = true; - if (m_dirtyTexture) - emit updateRequested(); -} - -void QQuickShaderEffectTexture::setRecursive(bool recursive) -{ - m_recursive = recursive; -} - -void QQuickShaderEffectTexture::markDirtyTexture() -{ - m_dirtyTexture = true; - if (m_live || m_grab) - emit updateRequested(); -} - -void QQuickShaderEffectTexture::grab() -{ - if (!m_item || m_size.isNull()) { - delete m_fbo; - delete m_secondaryFbo; - m_fbo = m_secondaryFbo = 0; - m_dirtyTexture = false; - if (m_grab) - emit scheduledUpdateCompleted(); - return; - } - QSGNode *root = m_item; - while (root->firstChild() && root->type() != QSGNode::RootNodeType) - root = root->firstChild(); - if (root->type() != QSGNode::RootNodeType) - return; - - if (!m_renderer) { - m_renderer = m_context->createRenderer(); - connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture())); - } - m_renderer->setRootNode(static_cast<QSGRootNode *>(root)); - - bool deleteFboLater = false; - if (!m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format - || (!m_fbo->format().mipmap() && m_mipmap)) - { - if (!m_multisamplingSupportChecked) { - QList<QByteArray> extensions = QByteArray((const char *)glGetString(GL_EXTENSIONS)).split(' '); - m_multisampling = extensions.contains("GL_EXT_framebuffer_multisample") - && extensions.contains("GL_EXT_framebuffer_blit"); - m_multisamplingSupportChecked = true; - } - if (m_multisampling) { - // Don't delete the FBO right away in case it is used recursively. - deleteFboLater = true; - delete m_secondaryFbo; - QOpenGLFramebufferObjectFormat format; - - format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil); - format.setInternalTextureFormat(m_format); - format.setSamples(8); - m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format); - } else { - QOpenGLFramebufferObjectFormat format; - format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil); - format.setInternalTextureFormat(m_format); - format.setMipmap(m_mipmap); - if (m_recursive) { - deleteFboLater = true; - delete m_secondaryFbo; - m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format); - glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture()); - updateBindOptions(true); - } else { - delete m_fbo; - delete m_secondaryFbo; - m_fbo = new QOpenGLFramebufferObject(m_size, format); - m_secondaryFbo = 0; - glBindTexture(GL_TEXTURE_2D, m_fbo->texture()); - updateBindOptions(true); - } - } - } - - if (m_recursive && !m_secondaryFbo) { - // m_fbo already created, m_recursive was just set. - Q_ASSERT(m_fbo); - Q_ASSERT(!m_multisampling); - - m_secondaryFbo = new QOpenGLFramebufferObject(m_size, m_fbo->format()); - glBindTexture(GL_TEXTURE_2D, m_secondaryFbo->texture()); - updateBindOptions(true); - } - - // Render texture. - root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip and opacity update. - m_renderer->nodeChanged(root, QSGNode::DirtyForceUpdate); // Force render list update. - -#ifdef QSG_DEBUG_FBO_OVERLAY - if (qmlFboOverlay()) { - if (!m_debugOverlay) - m_debugOverlay = m_context->createRectangleNode(); - m_debugOverlay->setRect(QRectF(0, 0, m_size.width(), m_size.height())); - m_debugOverlay->setColor(QColor(0xff, 0x00, 0x80, 0x40)); - m_debugOverlay->setPenColor(QColor()); - m_debugOverlay->setPenWidth(0); - m_debugOverlay->setRadius(0); - m_debugOverlay->update(); - root->appendChildNode(m_debugOverlay); - } -#endif - - m_dirtyTexture = false; - - QOpenGLContext *ctx = m_context->glContext(); - m_renderer->setDeviceRect(m_size); - m_renderer->setViewportRect(m_size); - QRectF mirrored(m_rect.left(), m_rect.bottom(), m_rect.width(), -m_rect.height()); - m_renderer->setProjectionMatrixToRect(mirrored); - m_renderer->setClearColor(Qt::transparent); - - if (m_multisampling) { - m_renderer->renderScene(QSGBindableFbo(m_secondaryFbo)); - - if (deleteFboLater) { - delete m_fbo; - QOpenGLFramebufferObjectFormat format; - format.setInternalTextureFormat(m_format); - format.setAttachment(QOpenGLFramebufferObject::NoAttachment); - format.setMipmap(m_mipmap); - format.setSamples(0); - m_fbo = new QOpenGLFramebufferObject(m_size, format); - glBindTexture(GL_TEXTURE_2D, m_fbo->texture()); - updateBindOptions(true); - } - - QRect r(QPoint(), m_size); - QOpenGLFramebufferObject::blitFramebuffer(m_fbo, r, m_secondaryFbo, r); - } else { - if (m_recursive) { - m_renderer->renderScene(QSGBindableFbo(m_secondaryFbo)); - - if (deleteFboLater) { - delete m_fbo; - QOpenGLFramebufferObjectFormat format; - format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil); - format.setInternalTextureFormat(m_format); - format.setMipmap(m_mipmap); - m_fbo = new QOpenGLFramebufferObject(m_size, format); - glBindTexture(GL_TEXTURE_2D, m_fbo->texture()); - updateBindOptions(true); - } - qSwap(m_fbo, m_secondaryFbo); - } else { - m_renderer->renderScene(QSGBindableFbo(m_fbo)); - } - } - - if (m_mipmap) { - glBindTexture(GL_TEXTURE_2D, textureId()); - ctx->functions()->glGenerateMipmap(GL_TEXTURE_2D); - } - - root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip, opacity and render list update. - -#ifdef QSG_DEBUG_FBO_OVERLAY - if (qmlFboOverlay()) - root->removeChildNode(m_debugOverlay); -#endif - if (m_recursive) - markDirtyTexture(); // Continuously update if 'live' and 'recursive'. - - if (m_grab) - emit scheduledUpdateCompleted(); -} - -QImage QQuickShaderEffectTexture::toImage() const -{ - if (m_fbo) - return m_fbo->toImage(); - - return QImage(); -} - -/*! - \qmlclass ShaderEffectSource QQuickShaderEffectSource - \since 5.0 - \ingroup qml-basic-visual-elements - \brief The ShaderEffectSource element renders a QML element into a texture - and displays it. - \inherits Item - - The ShaderEffectSource element renders \l sourceItem into a texture and - displays it in the scene. \l sourceItem is drawn into the texture as though - it was a fully opaque root element. Thus \l sourceItem itself can be - invisible, but still appear in the texture. - - ShaderEffectSource can be used as: - \list - \o a texture source in a \l ShaderEffect. - This allows you to apply custom shader effects to any QML element. - \o a cache for a complex element. - The complex element can be rendered once into the texture, which can - then be animated freely without the need to render the complex element - again every frame. - \o an opacity layer. - ShaderEffectSource allows you to apply an opacity to elements as a group - rather than each element individually. - \endlist - - \table - \row - \o \image declarative-shadereffectsource.png - \o \qml - import QtQuick 2.0 - - Rectangle { - width: 200 - height: 100 - gradient: Gradient { - GradientStop { position: 0; color: "white" } - GradientStop { position: 1; color: "black" } - } - Row { - opacity: 0.5 - Item { - id: foo - width: 100; height: 100 - Rectangle { x: 5; y: 5; width: 60; height: 60; color: "red" } - Rectangle { x: 20; y: 20; width: 60; height: 60; color: "orange" } - Rectangle { x: 35; y: 35; width: 60; height: 60; color: "yellow" } - } - ShaderEffectSource { - width: 100; height: 100 - sourceItem: foo - } - } - } - \endqml - \endrow - \endtable - - The ShaderEffectSource element does not redirect any mouse or keyboard - input to \l sourceItem. If you hide the \l sourceItem by setting - \l{Item::visible}{visible} to false or \l{Item::opacity}{opacity} to zero, - it will no longer react to input. In cases where the ShaderEffectSource is - meant to replace the \l sourceItem, you typically want to hide the - \l sourceItem while still handling input. For this, you can use - the \l hideSource property. - - \note If \l sourceItem is a \l Rectangle with border, by default half the - border width falls outside the texture. To get the whole border, you can - extend the \l sourceRect. - - \warning In most cases, using a ShaderEffectSource will decrease - performance, and in all cases, it will increase video memory usage. - Rendering through a ShaderEffectSource might also lead to lower quality - since some OpenGL implementations support multisampled backbuffer, - but not multisampled framebuffer objects. -*/ - -QQuickShaderEffectSource::QQuickShaderEffectSource(QQuickItem *parent) - : QQuickItem(parent) - , m_provider(0) - , m_texture(0) - , m_wrapMode(ClampToEdge) - , m_sourceItem(0) - , m_textureSize(0, 0) - , m_format(RGBA) - , m_live(true) - , m_hideSource(false) - , m_mipmap(false) - , m_recursive(false) - , m_grab(true) -{ - setFlag(ItemHasContents); -} - -QQuickShaderEffectSource::~QQuickShaderEffectSource() -{ - if (m_texture) - m_texture->deleteLater(); - - if (m_provider) - m_provider->deleteLater(); - - if (m_sourceItem) { - QQuickItemPrivate *sd = QQuickItemPrivate::get(m_sourceItem); - sd->removeItemChangeListener(this, QQuickItemPrivate::Geometry); - sd->derefFromEffectItem(m_hideSource); - } -} - -void QQuickShaderEffectSource::ensureTexture() -{ - if (m_texture) - return; - - Q_ASSERT_X(QQuickItemPrivate::get(this)->canvas - && QQuickItemPrivate::get(this)->sceneGraphContext() - && QThread::currentThread() == QQuickItemPrivate::get(this)->sceneGraphContext()->thread(), - "QQuickShaderEffectSource::ensureTexture", - "Cannot be used outside the rendering thread"); - - m_texture = new QQuickShaderEffectTexture(this); - connect(m_texture, SIGNAL(updateRequested()), this, SLOT(update())); - connect(m_texture, SIGNAL(scheduledUpdateCompleted()), this, SIGNAL(scheduledUpdateCompleted())); -} - -QSGTextureProvider *QQuickShaderEffectSource::textureProvider() const -{ - if (!m_provider) { - // Make sure it gets thread affinity on the rendering thread so deletion works properly.. - Q_ASSERT_X(QQuickItemPrivate::get(this)->canvas - && QQuickItemPrivate::get(this)->sceneGraphContext() - && QThread::currentThread() == QQuickItemPrivate::get(this)->sceneGraphContext()->thread(), - "QQuickShaderEffectSource::textureProvider", - "Cannot be used outside the rendering thread"); - const_cast<QQuickShaderEffectSource *>(this)->m_provider = new QQuickShaderEffectSourceTextureProvider(); - const_cast<QQuickShaderEffectSource *>(this)->ensureTexture(); - connect(m_texture, SIGNAL(updateRequested()), m_provider, SIGNAL(textureChanged())); - m_provider->sourceTexture = m_texture; - } - return m_provider; -} - -/*! - \qmlproperty enumeration ShaderEffectSource::wrapMode - - This property defines the OpenGL wrap modes associated with the texture. - Modifying this property makes most sense when the element is used as a - source texture of a \l ShaderEffect. - - \list - \o ShaderEffectSource.ClampToEdge - GL_CLAMP_TO_EDGE both horizontally and vertically - \o ShaderEffectSource.RepeatHorizontally - GL_REPEAT horizontally, GL_CLAMP_TO_EDGE vertically - \o ShaderEffectSource.RepeatVertically - GL_CLAMP_TO_EDGE horizontally, GL_REPEAT vertically - \o ShaderEffectSource.Repeat - GL_REPEAT both horizontally and vertically - \endlist - - \note Some OpenGL ES 2 implementations do not support the GL_REPEAT - wrap mode with non-power-of-two textures. -*/ - -QQuickShaderEffectSource::WrapMode QQuickShaderEffectSource::wrapMode() const -{ - return m_wrapMode; -} - -void QQuickShaderEffectSource::setWrapMode(WrapMode mode) -{ - if (mode == m_wrapMode) - return; - m_wrapMode = mode; - update(); - emit wrapModeChanged(); -} - -/*! - \qmlproperty Item ShaderEffectSource::sourceItem - - This property holds the element to be rendered into the texture. -*/ - -QQuickItem *QQuickShaderEffectSource::sourceItem() const -{ - return m_sourceItem; -} - -void QQuickShaderEffectSource::itemGeometryChanged(QQuickItem *item, const QRectF &newRect, const QRectF &oldRect) -{ - Q_ASSERT(item == m_sourceItem); - Q_UNUSED(item); - if (newRect.size() != oldRect.size()) - update(); -} - -void QQuickShaderEffectSource::setSourceItem(QQuickItem *item) -{ - if (item == m_sourceItem) - return; - if (m_sourceItem) { - QQuickItemPrivate *d = QQuickItemPrivate::get(m_sourceItem); - d->derefFromEffectItem(m_hideSource); - d->removeItemChangeListener(this, QQuickItemPrivate::Geometry); - } - m_sourceItem = item; - if (m_sourceItem) { - // TODO: Find better solution. - // 'm_sourceItem' 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 (m_sourceItem->parentItem() == 0) { - m_sourceItem->setParentItem(this); - m_sourceItem->setVisible(false); - } - QQuickItemPrivate *d = QQuickItemPrivate::get(m_sourceItem); - d->refFromEffectItem(m_hideSource); - d->addItemChangeListener(this, QQuickItemPrivate::Geometry); - } - update(); - emit sourceItemChanged(); -} - -/*! - \qmlproperty rect ShaderEffectSource::sourceRect - - This property defines which rectangular area of the \l sourceItem to - render into the texture. The source rectangle can be larger than - \l sourceItem itself. If the rectangle is null, which is the default, - the whole \l sourceItem is rendered to texture. -*/ - -QRectF QQuickShaderEffectSource::sourceRect() const -{ - return m_sourceRect; -} - -void QQuickShaderEffectSource::setSourceRect(const QRectF &rect) -{ - if (rect == m_sourceRect) - return; - m_sourceRect = rect; - update(); - emit sourceRectChanged(); -} - -/*! - \qmlproperty size ShaderEffectSource::textureSize - - This property holds the requested size of the texture. If it is empty, - which is the default, the size of the source rectangle is used. - - \note Some platforms have a limit on how small framebuffer objects can be, - which means the actual texture size might be larger than the requested - size. -*/ - -QSize QQuickShaderEffectSource::textureSize() const -{ - return m_textureSize; -} - -void QQuickShaderEffectSource::setTextureSize(const QSize &size) -{ - if (size == m_textureSize) - return; - m_textureSize = size; - update(); - emit textureSizeChanged(); -} - -/*! - \qmlproperty enumeration ShaderEffectSource::format - - This property defines the internal OpenGL format of the texture. - Modifying this property makes most sense when the element is used as a - source texture of a \l ShaderEffect. Depending on the OpenGL - implementation, this property might allow you to save some texture memory. - - \list - \o ShaderEffectSource.Alpha - GL_ALPHA - \o ShaderEffectSource.RGB - GL_RGB - \o ShaderEffectSource.RGBA - GL_RGBA - \endlist - - \note Some OpenGL implementations do not support the GL_ALPHA format. -*/ - -QQuickShaderEffectSource::Format QQuickShaderEffectSource::format() const -{ - return m_format; -} - -void QQuickShaderEffectSource::setFormat(QQuickShaderEffectSource::Format format) -{ - if (format == m_format) - return; - m_format = format; - update(); - emit formatChanged(); -} - -/*! - \qmlproperty bool ShaderEffectSource::live - - If this property is true, the texture is updated whenever the - \l sourceItem changes. Otherwise, it will be a frozen image of the - \l sourceItem. The property is true by default. -*/ - -bool QQuickShaderEffectSource::live() const -{ - return m_live; -} - -void QQuickShaderEffectSource::setLive(bool live) -{ - if (live == m_live) - return; - m_live = live; - update(); - emit liveChanged(); -} - -/*! - \qmlproperty bool ShaderEffectSource::hideSource - - If this property is true, the \l sourceItem is hidden, though it will still - be rendered into the texture. As opposed to hiding the \l sourceItem by - setting \l{Item::visible}{visible} to false, setting this property to true - will not prevent mouse or keyboard input from reaching \l sourceItem. - The property is useful when the ShaderEffectSource is anchored on top of, - and meant to replace the \l sourceItem. -*/ - -bool QQuickShaderEffectSource::hideSource() const -{ - return m_hideSource; -} - -void QQuickShaderEffectSource::setHideSource(bool hide) -{ - if (hide == m_hideSource) - return; - if (m_sourceItem) { - QQuickItemPrivate::get(m_sourceItem)->refFromEffectItem(hide); - QQuickItemPrivate::get(m_sourceItem)->derefFromEffectItem(m_hideSource); - } - m_hideSource = hide; - update(); - emit hideSourceChanged(); -} - -/*! - \qmlproperty bool ShaderEffectSource::mipmap - - If this property is true, mipmaps are generated for the texture. - - \note Some OpenGL ES 2 implementations do not support mipmapping of - non-power-of-two textures. -*/ - -bool QQuickShaderEffectSource::mipmap() const -{ - return m_mipmap; -} - -void QQuickShaderEffectSource::setMipmap(bool enabled) -{ - if (enabled == m_mipmap) - return; - m_mipmap = enabled; - update(); - emit mipmapChanged(); -} - -/*! - \qmlproperty bool ShaderEffectSource::recursive - - Set this property to true if the ShaderEffectSource has a dependency on - itself. ShaderEffectSources form a dependency chain, where one - ShaderEffectSource can be part of the \l sourceItem of another. - If there is a loop in this chain, a ShaderEffectSource could end up trying - to render into the same texture it is using as source, which is not allowed - by OpenGL. When this property is set to true, an extra texture is allocated - so that ShaderEffectSource can keep a copy of the texture from the previous - frame. It can then render into one texture and use the texture from the - previous frame as source. - - Setting both this property and \l live to true will cause the scene graph - to render continuously. Since the ShaderEffectSource depends on itself, - updating it means that it immediately becomes dirty again. -*/ - -bool QQuickShaderEffectSource::recursive() const -{ - return m_recursive; -} - -void QQuickShaderEffectSource::setRecursive(bool enabled) -{ - if (enabled == m_recursive) - return; - m_recursive = enabled; - emit recursiveChanged(); -} - -/*! - \qmlmethod ShaderEffectSource::scheduleUpdate() - - Schedules a re-rendering of the texture for the next frame. - Use this to update the texture when \l live is false. -*/ - -void QQuickShaderEffectSource::scheduleUpdate() -{ - if (m_grab) - return; - m_grab = true; - update(); -} - -static void get_wrap_mode(QQuickShaderEffectSource::WrapMode mode, QSGTexture::WrapMode *hWrap, QSGTexture::WrapMode *vWrap) -{ - switch (mode) { - case QQuickShaderEffectSource::RepeatHorizontally: - *hWrap = QSGTexture::Repeat; - *vWrap = QSGTexture::ClampToEdge; - break; - case QQuickShaderEffectSource::RepeatVertically: - *vWrap = QSGTexture::Repeat; - *hWrap = QSGTexture::ClampToEdge; - break; - case QQuickShaderEffectSource::Repeat: - *hWrap = *vWrap = QSGTexture::Repeat; - break; - default: - // QQuickShaderEffectSource::ClampToEdge - *hWrap = *vWrap = QSGTexture::ClampToEdge; - break; - } -} - - -QSGNode *QQuickShaderEffectSource::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) -{ - if (!m_sourceItem || m_sourceItem->width() == 0 || m_sourceItem->height() == 0) { - delete oldNode; - return 0; - } - - ensureTexture(); - - QQuickShaderEffectTexture *tex = qobject_cast<QQuickShaderEffectTexture *>(m_texture); - tex->setLive(m_live); - tex->setItem(QQuickItemPrivate::get(m_sourceItem)->itemNode()); - QRectF sourceRect = m_sourceRect.width() == 0 || m_sourceRect.height() == 0 - ? QRectF(0, 0, m_sourceItem->width(), m_sourceItem->height()) - : m_sourceRect; - tex->setRect(sourceRect); - QSize textureSize = m_textureSize.isEmpty() - ? QSize(qCeil(qAbs(sourceRect.width())), qCeil(qAbs(sourceRect.height()))) - : m_textureSize; - Q_ASSERT(!textureSize.isEmpty()); - QQuickItemPrivate *d = static_cast<QQuickItemPrivate *>(QObjectPrivate::get(this)); - const QSize minTextureSize = d->sceneGraphContext()->minimumFBOSize(); - // Keep power-of-two by doubling the size. - while (textureSize.width() < minTextureSize.width()) - textureSize.rwidth() *= 2; - while (textureSize.height() < minTextureSize.height()) - textureSize.rheight() *= 2; - - tex->setSize(textureSize); - tex->setRecursive(m_recursive); - tex->setFormat(GLenum(m_format)); - tex->setHasMipmaps(m_mipmap); - - if (m_grab) - tex->scheduleUpdate(); - m_grab = false; - - QSGTexture::Filtering filtering = QQuickItemPrivate::get(this)->smooth - ? QSGTexture::Linear - : QSGTexture::Nearest; - QSGTexture::Filtering mmFiltering = m_mipmap ? filtering : QSGTexture::None; - QSGTexture::WrapMode hWrap, vWrap; - get_wrap_mode(m_wrapMode, &hWrap, &vWrap); - - if (m_provider) { - m_provider->mipmapFiltering = mmFiltering; - m_provider->filtering = filtering; - m_provider->horizontalWrap = hWrap; - m_provider->verticalWrap = vWrap; - } - - // Don't create the paint node if we're not spanning any area - if (width() == 0 || height() == 0) { - delete oldNode; - return 0; - } - - QQuickShaderEffectSourceNode *node = static_cast<QQuickShaderEffectSourceNode *>(oldNode); - if (!node) { - node = new QQuickShaderEffectSourceNode; - node->setTexture(m_texture); - connect(m_texture, SIGNAL(updateRequested()), node, SLOT(markDirtyTexture())); - } - - // If live and recursive, update continuously. - if (m_live && m_recursive) - node->markDirty(QSGNode::DirtyMaterial); - - node->setMipmapFiltering(mmFiltering); - node->setFiltering(filtering); - node->setHorizontalWrapMode(hWrap); - node->setVerticalWrapMode(vWrap); - node->setTargetRect(QRectF(0, 0, width(), height())); - node->setSourceRect(QRectF(0, 0, 1, 1)); - node->update(); - - return node; -} - -QT_END_NAMESPACE |