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Diffstat (limited to 'src/declarative/items/qsgshadereffectsource.cpp')
| -rw-r--r-- | src/declarative/items/qsgshadereffectsource.cpp | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/src/declarative/items/qsgshadereffectsource.cpp b/src/declarative/items/qsgshadereffectsource.cpp new file mode 100644 index 0000000000..36d380b15f --- /dev/null +++ b/src/declarative/items/qsgshadereffectsource.cpp @@ -0,0 +1,526 @@ +/**************************************************************************** +** +** 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 "qsgshadereffectsource_p.h" + +#include "qsgitem_p.h" +#include "qsgcanvas_p.h" +#include <private/qsgadaptationlayer_p.h> +#include <private/qsgrenderer_p.h> + +#include "qglframebufferobject.h" +#include "qmath.h" +#include <private/qsgtexture_p.h> + +QT_BEGIN_NAMESPACE + +DEFINE_BOOL_CONFIG_OPTION(qmlFboOverlay, QML_FBO_OVERLAY) + +QSGShaderEffectTexture::QSGShaderEffectTexture(QSGItem *shaderSource) + : QSGDynamicTexture() + , m_item(0) + , m_format(GL_RGBA) + , m_shaderSource(shaderSource) + , m_renderer(0) + , m_fbo(0) + , m_multisampledFbo(0) +#ifdef QSG_DEBUG_FBO_OVERLAY + , m_debugOverlay(0) +#endif + , m_live(true) + , m_dirtyTexture(true) + , m_multisamplingSupportChecked(false) + , m_multisampling(false) +{ +} + +QSGShaderEffectTexture::~QSGShaderEffectTexture() +{ + delete m_renderer; + delete m_fbo; + delete m_multisampledFbo; +#ifdef QSG_DEBUG_FBO_OVERLAY + delete m_debugOverlay; +#endif +} + + +int QSGShaderEffectTexture::textureId() const +{ + return m_fbo->texture(); +} + +bool QSGShaderEffectTexture::hasAlphaChannel() const +{ + return m_format != GL_RGB; +} + +bool QSGShaderEffectTexture::hasMipmaps() const +{ + return m_mipmapFiltering; +} + + +void QSGShaderEffectTexture::bind() +{ + glBindTexture(GL_TEXTURE_2D, m_fbo->texture()); + updateBindOptions(); +} + +bool QSGShaderEffectTexture::updateTexture() +{ + if (m_dirtyTexture) { + grab(); + return true; + } + return false; +} + +void QSGShaderEffectTexture::setHasMipmaps(QSGTexture::Filtering filtering) +{ + if (filtering == m_mipmapFiltering) + return; + m_mipmapFiltering = filtering; + if (filtering != None && m_fbo && !m_fbo->format().mipmap()) + markDirtyTexture(); +} + + +void QSGShaderEffectTexture::setItem(QSGNode *item) +{ + if (item == m_item) + return; + m_item = item; + markDirtyTexture(); +} + +void QSGShaderEffectTexture::setRect(const QRectF &rect) +{ + if (rect == m_rect) + return; + m_rect = rect; + markDirtyTexture(); +} + +void QSGShaderEffectTexture::setSize(const QSize &size) +{ + if (size == m_size) + return; + m_size = size; + markDirtyTexture(); +} + +void QSGShaderEffectTexture::setFormat(GLenum format) +{ + if (format == m_format) + return; + m_format = format; + markDirtyTexture(); +} + +void QSGShaderEffectTexture::setLive(bool live) +{ + if (live == m_live) + return; + m_live = live; + markDirtyTexture(); +} + +void QSGShaderEffectTexture::markDirtyTexture() +{ + if (m_live) { + m_dirtyTexture = true; + emit textureChanged(); + } +} + +void QSGShaderEffectTexture::grab() +{ + Q_ASSERT(m_item); + QSGNode *root = m_item; + while (root->childCount() && root->type() != QSGNode::RootNodeType) + root = root->childAtIndex(0); + if (root->type() != QSGNode::RootNodeType) + return; + + if (m_size.isEmpty()) { + delete m_fbo; + delete m_multisampledFbo; + m_multisampledFbo = m_fbo = 0; + return; + } + + QSGContext *context = QSGItemPrivate::get(m_shaderSource)->sceneGraphContext(); + + if (!m_renderer) { + m_renderer = context->createRenderer(); + connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture())); + } + m_renderer->setRootNode(static_cast<QSGRootNode *>(root)); + + bool mipmap = m_mipmapFiltering != None; + if (!m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format + || (!m_fbo->format().mipmap() && 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) { + delete m_fbo; + delete m_multisampledFbo; + QGLFramebufferObjectFormat format; + + format.setAttachment(QGLFramebufferObject::CombinedDepthStencil); + format.setInternalTextureFormat(m_format); + format.setSamples(8); + m_multisampledFbo = new QGLFramebufferObject(m_size, format); + + format.setAttachment(QGLFramebufferObject::NoAttachment); + format.setMipmap(m_mipmapFiltering); + format.setSamples(0); + m_fbo = new QGLFramebufferObject(m_size, format); + + } else { + delete m_fbo; + QGLFramebufferObjectFormat format; + format.setAttachment(QGLFramebufferObject::CombinedDepthStencil); + format.setInternalTextureFormat(m_format); + format.setMipmap(m_mipmapFiltering); + m_fbo = new QGLFramebufferObject(m_size, format); + } + } + + // Render texture. + QSGNode::DirtyFlags dirty = root->dirtyFlags(); + root->markDirty(QSGNode::DirtyNodeAdded); // Force matrix and clip update. + m_renderer->nodeChanged(root, QSGNode::DirtyNodeAdded); // Force render list update. + +#ifdef QSG_DEBUG_FBO_OVERLAY + if (qmlFboOverlay()) { + if (!m_debugOverlay) + m_debugOverlay = 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; + + const QGLContext *ctx = QGLContext::currentContext(); + m_renderer->setDeviceRect(m_size); + m_renderer->setViewportRect(m_size); + m_renderer->setProjectMatrixToRect(m_rect); + m_renderer->setClearColor(Qt::transparent); + + if (m_multisampling) { + m_renderer->renderScene(BindableFbo(m_multisampledFbo)); + QRect r(0, 0, m_fbo->width(), m_fbo->height()); + QGLFramebufferObject::blitFramebuffer(m_fbo, r, m_multisampledFbo, r); + } else { + m_renderer->renderScene(BindableFbo(m_fbo)); + } + + if (mipmap) { + glBindTexture(GL_TEXTURE_2D, textureId()); + ctx->functions()->glGenerateMipmap(GL_TEXTURE_2D); + } + + root->markDirty(dirty | QSGNode::DirtyNodeAdded); // Force matrix, clip and render list update. + +#ifdef QSG_DEBUG_FBO_OVERLAY + if (qmlFboOverlay()) + root->removeChildNode(m_debugOverlay); +#endif +} + + +QSGShaderEffectSource::QSGShaderEffectSource(QSGItem *parent) + : QSGItem(parent) + , m_wrapMode(ClampToEdge) + , m_sourceItem(0) + , m_textureSize(0, 0) + , m_format(RGBA) + , m_live(true) + , m_hideSource(false) + , m_mipmap(false) +{ + setFlag(ItemHasContents); + m_texture = new QSGShaderEffectTexture(this); +} + +QSGShaderEffectSource::~QSGShaderEffectSource() +{ + delete m_texture; + if (m_sourceItem) + QSGItemPrivate::get(m_sourceItem)->derefFromEffectItem(m_hideSource); +} + +QSGShaderEffectSource::WrapMode QSGShaderEffectSource::wrapMode() const +{ + return m_wrapMode; +} + +void QSGShaderEffectSource::setWrapMode(WrapMode mode) +{ + if (mode == m_wrapMode) + return; + m_wrapMode = mode; + update(); + emit wrapModeChanged(); +} + +QSGItem *QSGShaderEffectSource::sourceItem() const +{ + return m_sourceItem; +} + +void QSGShaderEffectSource::setSourceItem(QSGItem *item) +{ + if (item == m_sourceItem) + return; + if (m_sourceItem) + QSGItemPrivate::get(m_sourceItem)->derefFromEffectItem(m_hideSource); + 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); + } + QSGItemPrivate::get(m_sourceItem)->refFromEffectItem(m_hideSource); + } + update(); + emit sourceItemChanged(); +} + +QRectF QSGShaderEffectSource::sourceRect() const +{ + return m_sourceRect; +} + +void QSGShaderEffectSource::setSourceRect(const QRectF &rect) +{ + if (rect == m_sourceRect) + return; + m_sourceRect = rect; + update(); + emit sourceRectChanged(); +} + +QSize QSGShaderEffectSource::textureSize() const +{ + return m_textureSize; +} + +void QSGShaderEffectSource::setTextureSize(const QSize &size) +{ + if (size == m_textureSize) + return; + m_textureSize = size; + update(); + emit textureSizeChanged(); +} + +QSGShaderEffectSource::Format QSGShaderEffectSource::format() const +{ + return m_format; +} + +void QSGShaderEffectSource::setFormat(QSGShaderEffectSource::Format format) +{ + if (format == m_format) + return; + m_format = format; + update(); + emit formatChanged(); +} + +bool QSGShaderEffectSource::live() const +{ + return m_live; +} + +void QSGShaderEffectSource::setLive(bool live) +{ + if (live == m_live) + return; + m_live = live; + update(); + emit liveChanged(); +} + +bool QSGShaderEffectSource::hideSource() const +{ + return m_hideSource; +} + +void QSGShaderEffectSource::setHideSource(bool hide) +{ + if (hide == m_hideSource) + return; + if (m_sourceItem) { + QSGItemPrivate::get(m_sourceItem)->refFromEffectItem(hide); + QSGItemPrivate::get(m_sourceItem)->derefFromEffectItem(m_hideSource); + } + m_hideSource = hide; + update(); + emit hideSourceChanged(); +} + +bool QSGShaderEffectSource::mipmap() const +{ + return m_mipmap; +} + +void QSGShaderEffectSource::setMipmap(bool enabled) +{ + if (enabled == m_mipmap) + return; + printf("setting mipmap to: %d\n", enabled); + m_mipmap = enabled; + update(); + emit mipmapChanged(); +} + +void QSGShaderEffectSource::grab() +{ + if (!m_sourceItem) + return; + QSGCanvas *canvas = m_sourceItem->canvas(); + if (!canvas) + return; + QSGCanvasPrivate::get(canvas)->updateDirtyNodes(); + QGLContext *glctx = const_cast<QGLContext *>(canvas->context()); + glctx->makeCurrent(); + qobject_cast<QSGShaderEffectTexture *>(m_texture)->grab(); +} + +static void get_wrap_mode(QSGShaderEffectSource::WrapMode mode, QSGTexture::WrapMode *hWrap, QSGTexture::WrapMode *vWrap) +{ + switch (mode) { + case QSGShaderEffectSource::RepeatHorizontally: + *hWrap = QSGTexture::Repeat; + *vWrap = QSGTexture::ClampToEdge; + break; + case QSGShaderEffectSource::RepeatVertically: + *vWrap = QSGTexture::Repeat; + *hWrap = QSGTexture::ClampToEdge; + break; + case QSGShaderEffectSource::Repeat: + *hWrap = *vWrap = QSGTexture::Repeat; + break; + default: + break; + } +} + + +QSGTexture *QSGShaderEffectSource::texture() const +{ + m_texture->setMipmapFiltering(m_mipmap ? QSGTexture::Linear : QSGTexture::None); + m_texture->setFiltering(QSGItemPrivate::get(this)->smooth ? QSGTexture::Linear : QSGTexture::Nearest); + QSGTexture::WrapMode h, v; + get_wrap_mode(m_wrapMode, &h, &v); + m_texture->setHorizontalWrapMode(h); + m_texture->setVerticalWrapMode(v); + return m_texture; +} + +QSGNode *QSGShaderEffectSource::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) +{ + if (!m_sourceItem) { + delete oldNode; + return 0; + } + + QSGImageNode *node = static_cast<QSGImageNode *>(oldNode); + if (!node) { + node = QSGItemPrivate::get(this)->sceneGraphContext()->createImageNode(); + node->setFlag(QSGNode::UsePreprocess, true); + node->setTexture(m_texture); + } + + QSGShaderEffectTexture *tex = qobject_cast<QSGShaderEffectTexture *>(m_texture); + + tex->setItem(QSGItemPrivate::get(m_sourceItem)->itemNode()); + QRectF sourceRect = m_sourceRect.isEmpty() + ? QRectF(0, 0, m_sourceItem->width(), m_sourceItem->height()) + : m_sourceRect; + tex->setRect(sourceRect); + QSize textureSize = m_textureSize.isEmpty() + ? QSize(qCeil(sourceRect.width()), qCeil(sourceRect.height())) + : m_textureSize; + tex->setSize(textureSize); + tex->setLive(m_live); + tex->setFormat(GLenum(m_format)); + + QSGTexture::Filtering filtering = QSGItemPrivate::get(this)->smooth + ? QSGTexture::Linear + : QSGTexture::Nearest; + QSGTexture::Filtering mmFiltering = m_mipmap ? filtering : QSGTexture::None; + tex->setHasMipmaps(mmFiltering); + node->setMipmapFiltering(mmFiltering); + node->setFiltering(filtering); + + QSGTexture::WrapMode hWrap, vWrap; + get_wrap_mode(m_wrapMode, &hWrap, &vWrap); + + node->setHorizontalWrapMode(hWrap); + node->setVerticalWrapMode(vWrap); + node->setTargetRect(QRectF(0, 0, width(), height())); + node->setSourceRect(QRectF(0, 1, 1, -1)); + node->update(); + + return node; +} + +QT_END_NAMESPACE |