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14 ** file. Please review the following information to ensure the GNU Lesser
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22 ** GNU General Public License Usage
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40 ****************************************************************************/
42 #include "qsgpainternode_p.h"
44 #include <private/qquickpainteditem_p.h>
46 #include <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;
158 if (m_actualRenderTarget == QQuickPaintedItem::Image)
159 painter.begin(&m_image);
162 m_gl_device = new QOpenGLPaintDevice(m_fboSize);
163 m_gl_device->setPaintFlipped(true);
166 if (m_multisampledFbo)
167 m_multisampledFbo->bind();
171 painter.begin(m_gl_device);
174 if (m_smoothPainting) {
175 painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing
176 | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
179 painter.scale(m_contentsScale, m_contentsScale);
181 QRect sclip(qFloor(dirtyRect.x()/m_contentsScale),
182 qFloor(dirtyRect.y()/m_contentsScale),
183 qCeil(dirtyRect.width()/m_contentsScale+dirtyRect.x()/m_contentsScale-qFloor(dirtyRect.x()/m_contentsScale)),
184 qCeil(dirtyRect.height()/m_contentsScale+dirtyRect.y()/m_contentsScale-qFloor(dirtyRect.y()/m_contentsScale)));
186 if (!m_dirtyRect.isNull())
187 painter.setClipRect(sclip);
189 painter.setCompositionMode(QPainter::CompositionMode_Source);
190 painter.fillRect(sclip, m_fillColor);
191 painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
193 m_item->paint(&painter);
196 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
197 m_texture->setImage(m_image);
198 m_texture->setDirtyRect(dirtyRect);
199 } else if (m_multisampledFbo) {
200 QOpenGLFramebufferObject::blitFramebuffer(m_fbo, dirtyRect, m_multisampledFbo, dirtyRect);
203 if (m_multisampledFbo)
204 m_multisampledFbo->release();
208 m_dirtyRect = QRect();
211 void QSGPainterNode::update()
213 if (m_dirtyRenderTarget)
214 updateRenderTarget();
223 m_dirtyGeometry = false;
224 m_dirtyRenderTarget = false;
225 m_dirtyTexture = false;
226 m_dirtyContents = false;
229 void QSGPainterNode::updateTexture()
231 m_texture->setHasMipmaps(m_mipmapping);
232 m_texture->setHasAlphaChannel(!m_opaquePainting);
233 m_material.setTexture(m_texture);
234 m_materialO.setTexture(m_texture);
236 markDirty(DirtyMaterial);
239 void QSGPainterNode::updateGeometry()
242 if (m_actualRenderTarget == QQuickPaintedItem::Image)
243 source = QRectF(0, 0, 1, 1);
245 source = QRectF(0, 0, qreal(m_size.width()) / m_fboSize.width(), qreal(m_size.height()) / m_fboSize.height());
246 QRectF dest(0, 0, m_size.width(), m_size.height());
247 if (m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject)
248 dest = QRectF(QPointF(0, m_size.height()), QPointF(m_size.width(), 0));
249 QSGGeometry::updateTexturedRectGeometry(&m_geometry,
252 markDirty(DirtyGeometry);
255 void QSGPainterNode::updateRenderTarget()
257 if (!m_extensionsChecked) {
258 QList<QByteArray> extensions = QByteArray((const char *)glGetString(GL_EXTENSIONS)).split(' ');
259 m_multisamplingSupported = extensions.contains("GL_EXT_framebuffer_multisample")
260 && extensions.contains("GL_EXT_framebuffer_blit");
261 m_extensionsChecked = true;
264 m_dirtyContents = true;
266 QQuickPaintedItem::RenderTarget oldTarget = m_actualRenderTarget;
267 if (m_preferredRenderTarget == QQuickPaintedItem::Image) {
268 m_actualRenderTarget = QQuickPaintedItem::Image;
270 if (!m_multisamplingSupported && m_smoothPainting)
271 m_actualRenderTarget = QQuickPaintedItem::Image;
273 m_actualRenderTarget = m_preferredRenderTarget;
275 if (oldTarget != m_actualRenderTarget) {
278 delete m_multisampledFbo;
279 m_fbo = m_multisampledFbo = 0;
282 if (m_actualRenderTarget == QQuickPaintedItem::FramebufferObject ||
283 m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject) {
284 const QOpenGLContext *ctx = m_context->glContext();
285 if (m_fbo && !m_dirtyGeometry && (!ctx->format().samples() || !m_multisamplingSupported))
288 if (m_fboSize.isEmpty())
292 delete m_multisampledFbo;
293 m_fbo = m_multisampledFbo = 0;
295 if (m_smoothPainting && ctx->format().samples() && m_multisamplingSupported) {
297 QOpenGLFramebufferObjectFormat format;
298 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
299 format.setSamples(8);
300 m_multisampledFbo = new QOpenGLFramebufferObject(m_fboSize, format);
303 QOpenGLFramebufferObjectFormat format;
304 format.setAttachment(QOpenGLFramebufferObject::NoAttachment);
305 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
308 QOpenGLFramebufferObjectFormat format;
309 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
310 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
313 if (!m_image.isNull() && !m_dirtyGeometry)
316 m_image = QImage(m_size, QImage::Format_ARGB32_Premultiplied);
317 m_image.fill(Qt::transparent);
320 QSGPainterTexture *texture = new QSGPainterTexture;
321 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
322 texture->setOwnsTexture(true);
323 texture->setTextureSize(m_size);
325 texture->setTextureId(m_fbo->texture());
326 texture->setOwnsTexture(false);
327 texture->setTextureSize(m_fboSize);
333 texture->setTextureSize(m_size);
337 void QSGPainterNode::updateFBOSize()
341 if (m_fastFBOResizing) {
342 fboWidth = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.width()));
343 fboHeight = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.height()));
345 QSize minimumFBOSize = m_context->minimumFBOSize();
346 fboWidth = qMax(minimumFBOSize.width(), m_size.width());
347 fboHeight = qMax(minimumFBOSize.height(), m_size.height());
350 m_fboSize = QSize(fboWidth, fboHeight);
353 void QSGPainterNode::setPreferredRenderTarget(QQuickPaintedItem::RenderTarget target)
355 if (m_preferredRenderTarget == target)
358 m_preferredRenderTarget = target;
360 m_dirtyRenderTarget = true;
361 m_dirtyGeometry = true;
362 m_dirtyTexture = true;
365 void QSGPainterNode::setSize(const QSize &size)
374 m_dirtyRenderTarget = m_fbo->size() != m_fboSize || m_dirtyRenderTarget;
376 m_dirtyRenderTarget = true;
377 m_dirtyGeometry = true;
378 m_dirtyTexture = true;
381 void QSGPainterNode::setDirty(bool d, const QRect &dirtyRect)
384 m_dirtyRect = dirtyRect;
387 m_dirtyTexture = true;
389 markDirty(DirtyMaterial);
392 void QSGPainterNode::setOpaquePainting(bool opaque)
394 if (opaque == m_opaquePainting)
397 m_opaquePainting = opaque;
398 m_dirtyTexture = true;
401 void QSGPainterNode::setLinearFiltering(bool linearFiltering)
403 if (linearFiltering == m_linear_filtering)
406 m_linear_filtering = linearFiltering;
408 m_material.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
409 m_materialO.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
410 markDirty(DirtyMaterial);
413 void QSGPainterNode::setMipmapping(bool mipmapping)
415 if (mipmapping == m_mipmapping)
418 m_mipmapping = mipmapping;
419 m_material.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
420 m_materialO.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
421 m_dirtyTexture = true;
424 void QSGPainterNode::setSmoothPainting(bool s)
426 if (s == m_smoothPainting)
429 m_smoothPainting = s;
430 m_dirtyRenderTarget = true;
433 void QSGPainterNode::setFillColor(const QColor &c)
435 if (c == m_fillColor)
439 markDirty(DirtyMaterial);
442 void QSGPainterNode::setContentsScale(qreal s)
444 if (s == m_contentsScale)
448 markDirty(DirtyMaterial);
451 void QSGPainterNode::setFastFBOResizing(bool dynamic)
453 m_fastFBOResizing = dynamic;
456 QImage QSGPainterNode::toImage() const
458 if (m_actualRenderTarget == QQuickPaintedItem::Image)
461 return m_fbo->toImage();