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3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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5 ** Contact: http://www.qt-project.org/
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
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13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
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20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
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26 ** file. Please review the following information to ensure the GNU General
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40 ****************************************************************************/
42 #include "qsgpainternode_p.h"
44 #include <QtQuick/private/qquickpainteditem_p.h>
46 #include <QtQuick/private/qsgcontext_p.h>
47 #include <private/qopenglextensions_p.h>
48 #include <qopenglframebufferobject.h>
49 #include <qopenglfunctions.h>
50 #include <qopenglpaintdevice.h>
56 #define QT_MINIMUM_DYNAMIC_FBO_SIZE 64
58 static inline int qt_next_power_of_two(int v)
70 QSGPainterTexture::QSGPainterTexture()
76 void QSGPainterTexture::bind()
78 if (m_dirty_rect.isNull()) {
79 QSGPlainTexture::bind();
83 bool oldMipmapsGenerated = m_mipmaps_generated;
84 m_mipmaps_generated = true;
85 QSGPlainTexture::bind();
86 m_mipmaps_generated = oldMipmapsGenerated;
88 QImage subImage = m_image.copy(m_dirty_rect);
90 int w = m_dirty_rect.width();
91 int h = m_dirty_rect.height();
94 glTexSubImage2D(GL_TEXTURE_2D, 0, m_dirty_rect.x(), m_dirty_rect.y(), w, h,
95 GL_RGBA, GL_UNSIGNED_BYTE, subImage.constBits());
97 glTexSubImage2D(GL_TEXTURE_2D, 0, m_dirty_rect.x(), m_dirty_rect.y(), w, h,
98 GL_BGRA, GL_UNSIGNED_BYTE, subImage.constBits());
101 if (m_has_mipmaps && !m_mipmaps_generated) {
102 QOpenGLContext *ctx = QOpenGLContext::currentContext();
103 ctx->functions()->glGenerateMipmap(GL_TEXTURE_2D);
104 m_mipmaps_generated = true;
107 m_dirty_texture = false;
108 m_dirty_bind_options = false;
110 m_dirty_rect = QRect();
113 QSGPainterNode::QSGPainterNode(QQuickPaintedItem *item)
115 , m_preferredRenderTarget(QQuickPaintedItem::Image)
116 , m_actualRenderTarget(QQuickPaintedItem::Image)
119 , m_multisampledFbo(0)
120 , m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
124 , m_dirtyContents(false)
125 , m_opaquePainting(false)
126 , m_linear_filtering(false)
127 , m_mipmapping(false)
128 , m_smoothPainting(false)
129 , m_extensionsChecked(false)
130 , m_multisamplingSupported(false)
131 , m_fastFBOResizing(false)
132 , m_fillColor(Qt::transparent)
133 , m_contentsScale(1.0)
134 , m_dirtyGeometry(false)
135 , m_dirtyRenderTarget(false)
136 , m_dirtyTexture(false)
138 m_context = static_cast<QQuickPaintedItemPrivate *>(QObjectPrivate::get(item))->sceneGraphContext();
140 setMaterial(&m_materialO);
141 setOpaqueMaterial(&m_material);
142 setGeometry(&m_geometry);
145 QSGPainterNode::~QSGPainterNode()
149 delete m_multisampledFbo;
153 void QSGPainterNode::paint()
155 QRect dirtyRect = m_dirtyRect.isNull() ? QRect(0, 0, m_size.width(), m_size.height()) : m_dirtyRect;
157 if (m_image.isNull())
161 if (m_actualRenderTarget == QQuickPaintedItem::Image)
162 painter.begin(&m_image);
165 m_gl_device = new QOpenGLPaintDevice(m_fboSize);
166 m_gl_device->setPaintFlipped(true);
169 if (m_multisampledFbo)
170 m_multisampledFbo->bind();
174 painter.begin(m_gl_device);
177 if (m_smoothPainting) {
178 painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing
179 | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
182 painter.scale(m_contentsScale, m_contentsScale);
184 QRect sclip(qFloor(dirtyRect.x()/m_contentsScale),
185 qFloor(dirtyRect.y()/m_contentsScale),
186 qCeil(dirtyRect.width()/m_contentsScale+dirtyRect.x()/m_contentsScale-qFloor(dirtyRect.x()/m_contentsScale)),
187 qCeil(dirtyRect.height()/m_contentsScale+dirtyRect.y()/m_contentsScale-qFloor(dirtyRect.y()/m_contentsScale)));
189 if (!m_dirtyRect.isNull())
190 painter.setClipRect(sclip);
192 painter.setCompositionMode(QPainter::CompositionMode_Source);
193 painter.fillRect(sclip, m_fillColor);
194 painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
196 m_item->paint(&painter);
199 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
200 m_texture->setImage(m_image);
201 m_texture->setDirtyRect(dirtyRect);
202 } else if (m_multisampledFbo) {
203 QOpenGLFramebufferObject::blitFramebuffer(m_fbo, dirtyRect, m_multisampledFbo, dirtyRect);
206 if (m_multisampledFbo)
207 m_multisampledFbo->release();
211 m_dirtyRect = QRect();
214 void QSGPainterNode::update()
216 if (m_dirtyRenderTarget)
217 updateRenderTarget();
226 m_dirtyGeometry = false;
227 m_dirtyRenderTarget = false;
228 m_dirtyTexture = false;
229 m_dirtyContents = false;
232 void QSGPainterNode::updateTexture()
234 m_texture->setHasMipmaps(m_mipmapping);
235 m_texture->setHasAlphaChannel(!m_opaquePainting);
236 m_material.setTexture(m_texture);
237 m_materialO.setTexture(m_texture);
239 markDirty(DirtyMaterial);
242 void QSGPainterNode::updateGeometry()
245 if (m_actualRenderTarget == QQuickPaintedItem::Image)
246 source = QRectF(0, 0, 1, 1);
248 source = QRectF(0, 0, qreal(m_size.width()) / m_fboSize.width(), qreal(m_size.height()) / m_fboSize.height());
249 QRectF dest(0, 0, m_size.width(), m_size.height());
250 if (m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject)
251 dest = QRectF(QPointF(0, m_size.height()), QPointF(m_size.width(), 0));
252 QSGGeometry::updateTexturedRectGeometry(&m_geometry,
255 markDirty(DirtyGeometry);
258 void QSGPainterNode::updateRenderTarget()
260 if (!m_extensionsChecked) {
261 QList<QByteArray> extensions = QByteArray((const char *)glGetString(GL_EXTENSIONS)).split(' ');
262 m_multisamplingSupported = extensions.contains("GL_EXT_framebuffer_multisample")
263 && extensions.contains("GL_EXT_framebuffer_blit");
264 m_extensionsChecked = true;
267 m_dirtyContents = true;
269 QQuickPaintedItem::RenderTarget oldTarget = m_actualRenderTarget;
270 if (m_preferredRenderTarget == QQuickPaintedItem::Image) {
271 m_actualRenderTarget = QQuickPaintedItem::Image;
273 if (!m_multisamplingSupported && m_smoothPainting)
274 m_actualRenderTarget = QQuickPaintedItem::Image;
276 m_actualRenderTarget = m_preferredRenderTarget;
278 if (oldTarget != m_actualRenderTarget) {
281 delete m_multisampledFbo;
282 m_fbo = m_multisampledFbo = 0;
285 if (m_actualRenderTarget == QQuickPaintedItem::FramebufferObject ||
286 m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject) {
287 const QOpenGLContext *ctx = m_context->glContext();
288 if (m_fbo && !m_dirtyGeometry && (!ctx->format().samples() || !m_multisamplingSupported))
291 if (m_fboSize.isEmpty())
295 delete m_multisampledFbo;
296 m_fbo = m_multisampledFbo = 0;
298 if (m_smoothPainting && ctx->format().samples() && m_multisamplingSupported) {
300 QOpenGLFramebufferObjectFormat format;
301 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
302 format.setSamples(8);
303 m_multisampledFbo = new QOpenGLFramebufferObject(m_fboSize, format);
306 QOpenGLFramebufferObjectFormat format;
307 format.setAttachment(QOpenGLFramebufferObject::NoAttachment);
308 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
311 QOpenGLFramebufferObjectFormat format;
312 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
313 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
316 if (!m_image.isNull() && !m_dirtyGeometry)
319 m_image = QImage(m_size, QImage::Format_ARGB32_Premultiplied);
320 m_image.fill(Qt::transparent);
323 QSGPainterTexture *texture = new QSGPainterTexture;
324 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
325 texture->setOwnsTexture(true);
326 texture->setTextureSize(m_size);
328 texture->setTextureId(m_fbo->texture());
329 texture->setOwnsTexture(false);
330 texture->setTextureSize(m_fboSize);
336 texture->setTextureSize(m_size);
340 void QSGPainterNode::updateFBOSize()
344 if (m_fastFBOResizing) {
345 fboWidth = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.width()));
346 fboHeight = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.height()));
348 QSize minimumFBOSize = m_context->minimumFBOSize();
349 fboWidth = qMax(minimumFBOSize.width(), m_size.width());
350 fboHeight = qMax(minimumFBOSize.height(), m_size.height());
353 m_fboSize = QSize(fboWidth, fboHeight);
356 void QSGPainterNode::setPreferredRenderTarget(QQuickPaintedItem::RenderTarget target)
358 if (m_preferredRenderTarget == target)
361 m_preferredRenderTarget = target;
363 m_dirtyRenderTarget = true;
364 m_dirtyGeometry = true;
365 m_dirtyTexture = true;
368 void QSGPainterNode::setSize(const QSize &size)
377 m_dirtyRenderTarget = m_fbo->size() != m_fboSize || m_dirtyRenderTarget;
379 m_dirtyRenderTarget = true;
380 m_dirtyGeometry = true;
381 m_dirtyTexture = true;
384 void QSGPainterNode::setDirty(const QRect &dirtyRect)
386 m_dirtyContents = true;
387 m_dirtyRect = dirtyRect;
390 m_dirtyTexture = true;
392 markDirty(DirtyMaterial);
395 void QSGPainterNode::setOpaquePainting(bool opaque)
397 if (opaque == m_opaquePainting)
400 m_opaquePainting = opaque;
401 m_dirtyTexture = true;
404 void QSGPainterNode::setLinearFiltering(bool linearFiltering)
406 if (linearFiltering == m_linear_filtering)
409 m_linear_filtering = linearFiltering;
411 m_material.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
412 m_materialO.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
413 markDirty(DirtyMaterial);
416 void QSGPainterNode::setMipmapping(bool mipmapping)
418 if (mipmapping == m_mipmapping)
421 m_mipmapping = mipmapping;
422 m_material.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
423 m_materialO.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
424 m_dirtyTexture = true;
427 void QSGPainterNode::setSmoothPainting(bool s)
429 if (s == m_smoothPainting)
432 m_smoothPainting = s;
433 m_dirtyRenderTarget = true;
436 void QSGPainterNode::setFillColor(const QColor &c)
438 if (c == m_fillColor)
442 markDirty(DirtyMaterial);
445 void QSGPainterNode::setContentsScale(qreal s)
447 if (s == m_contentsScale)
451 markDirty(DirtyMaterial);
454 void QSGPainterNode::setFastFBOResizing(bool dynamic)
456 m_fastFBOResizing = dynamic;
459 QImage QSGPainterNode::toImage() const
461 if (m_actualRenderTarget == QQuickPaintedItem::Image)
464 return m_fbo->toImage();