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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() || m_texture_id == 0) {
79 QSGPlainTexture::bind();
81 glBindTexture(GL_TEXTURE_2D, m_texture_id);
83 QImage subImage = m_image.copy(m_dirty_rect);
85 int w = m_dirty_rect.width();
86 int h = m_dirty_rect.height();
89 glTexSubImage2D(GL_TEXTURE_2D, 0, m_dirty_rect.x(), m_dirty_rect.y(), w, h,
90 GL_RGBA, GL_UNSIGNED_BYTE, subImage.constBits());
92 glTexSubImage2D(GL_TEXTURE_2D, 0, m_dirty_rect.x(), m_dirty_rect.y(), w, h,
93 GL_BGRA, GL_UNSIGNED_BYTE, subImage.constBits());
96 if (m_has_mipmaps && !m_mipmaps_generated) {
97 QOpenGLContext *ctx = QOpenGLContext::currentContext();
98 ctx->functions()->glGenerateMipmap(GL_TEXTURE_2D);
99 m_mipmaps_generated = true;
102 m_dirty_texture = false;
103 m_dirty_bind_options = false;
105 m_dirty_rect = QRect();
108 QSGPainterNode::QSGPainterNode(QQuickPaintedItem *item)
110 , m_preferredRenderTarget(QQuickPaintedItem::Image)
111 , m_actualRenderTarget(QQuickPaintedItem::Image)
114 , m_multisampledFbo(0)
115 , m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
119 , m_dirtyContents(false)
120 , m_opaquePainting(false)
121 , m_linear_filtering(false)
122 , m_mipmapping(false)
123 , m_smoothPainting(false)
124 , m_extensionsChecked(false)
125 , m_multisamplingSupported(false)
126 , m_fastFBOResizing(false)
127 , m_fillColor(Qt::transparent)
128 , m_contentsScale(1.0)
129 , m_dirtyGeometry(false)
130 , m_dirtyRenderTarget(false)
131 , m_dirtyTexture(false)
133 m_context = static_cast<QQuickPaintedItemPrivate *>(QObjectPrivate::get(item))->sceneGraphContext();
135 setMaterial(&m_materialO);
136 setOpaqueMaterial(&m_material);
137 setGeometry(&m_geometry);
140 QSGPainterNode::~QSGPainterNode()
144 delete m_multisampledFbo;
148 void QSGPainterNode::paint()
150 QRect dirtyRect = m_dirtyRect.isNull() ? QRect(0, 0, m_size.width(), m_size.height()) : m_dirtyRect;
153 if (m_actualRenderTarget == QQuickPaintedItem::Image)
154 painter.begin(&m_image);
157 m_gl_device = new QOpenGLPaintDevice(m_fboSize);
158 m_gl_device->setPaintFlipped(true);
161 if (m_multisampledFbo)
162 m_multisampledFbo->bind();
166 painter.begin(m_gl_device);
169 if (m_smoothPainting) {
170 painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing
171 | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
174 painter.scale(m_contentsScale, m_contentsScale);
176 QRect sclip(qFloor(dirtyRect.x()/m_contentsScale),
177 qFloor(dirtyRect.y()/m_contentsScale),
178 qCeil(dirtyRect.width()/m_contentsScale+dirtyRect.x()/m_contentsScale-qFloor(dirtyRect.x()/m_contentsScale)),
179 qCeil(dirtyRect.height()/m_contentsScale+dirtyRect.y()/m_contentsScale-qFloor(dirtyRect.y()/m_contentsScale)));
181 if (!m_dirtyRect.isNull())
182 painter.setClipRect(sclip);
184 painter.setCompositionMode(QPainter::CompositionMode_Source);
185 painter.fillRect(sclip, m_fillColor);
186 painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
188 m_item->paint(&painter);
191 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
192 m_texture->setImage(m_image);
193 m_texture->setDirtyRect(dirtyRect);
194 } else if (m_multisampledFbo) {
195 QOpenGLFramebufferObject::blitFramebuffer(m_fbo, dirtyRect, m_multisampledFbo, dirtyRect);
198 if (m_multisampledFbo)
199 m_multisampledFbo->release();
203 m_dirtyRect = QRect();
206 void QSGPainterNode::update()
208 if (m_dirtyRenderTarget)
209 updateRenderTarget();
218 m_dirtyGeometry = false;
219 m_dirtyRenderTarget = false;
220 m_dirtyTexture = false;
221 m_dirtyContents = false;
224 void QSGPainterNode::updateTexture()
226 m_texture->setHasMipmaps(m_mipmapping);
227 m_texture->setHasAlphaChannel(!m_opaquePainting);
228 m_material.setTexture(m_texture);
229 m_materialO.setTexture(m_texture);
231 markDirty(DirtyMaterial);
234 void QSGPainterNode::updateGeometry()
237 if (m_actualRenderTarget == QQuickPaintedItem::Image)
238 source = QRectF(0, 0, 1, 1);
240 source = QRectF(0, 0, qreal(m_size.width()) / m_fboSize.width(), qreal(m_size.height()) / m_fboSize.height());
241 QRectF dest(0, 0, m_size.width(), m_size.height());
242 if (m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject)
243 dest = QRectF(QPointF(0, m_size.height()), QPointF(m_size.width(), 0));
244 QSGGeometry::updateTexturedRectGeometry(&m_geometry,
247 markDirty(DirtyGeometry);
250 void QSGPainterNode::updateRenderTarget()
252 if (!m_extensionsChecked) {
253 QList<QByteArray> extensions = QByteArray((const char *)glGetString(GL_EXTENSIONS)).split(' ');
254 m_multisamplingSupported = extensions.contains("GL_EXT_framebuffer_multisample")
255 && extensions.contains("GL_EXT_framebuffer_blit");
256 m_extensionsChecked = true;
259 m_dirtyContents = true;
261 QQuickPaintedItem::RenderTarget oldTarget = m_actualRenderTarget;
262 if (m_preferredRenderTarget == QQuickPaintedItem::Image) {
263 m_actualRenderTarget = QQuickPaintedItem::Image;
265 if (!m_multisamplingSupported && m_smoothPainting)
266 m_actualRenderTarget = QQuickPaintedItem::Image;
268 m_actualRenderTarget = m_preferredRenderTarget;
270 if (oldTarget != m_actualRenderTarget) {
273 delete m_multisampledFbo;
274 m_fbo = m_multisampledFbo = 0;
277 if (m_actualRenderTarget == QQuickPaintedItem::FramebufferObject ||
278 m_actualRenderTarget == QQuickPaintedItem::InvertedYFramebufferObject) {
279 const QOpenGLContext *ctx = m_context->glContext();
280 if (m_fbo && !m_dirtyGeometry && (!ctx->format().samples() || !m_multisamplingSupported))
283 if (m_fboSize.isEmpty())
287 delete m_multisampledFbo;
288 m_fbo = m_multisampledFbo = 0;
290 if (m_smoothPainting && ctx->format().samples() && m_multisamplingSupported) {
292 QOpenGLFramebufferObjectFormat format;
293 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
294 format.setSamples(8);
295 m_multisampledFbo = new QOpenGLFramebufferObject(m_fboSize, format);
298 QOpenGLFramebufferObjectFormat format;
299 format.setAttachment(QOpenGLFramebufferObject::NoAttachment);
300 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
303 QOpenGLFramebufferObjectFormat format;
304 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
305 m_fbo = new QOpenGLFramebufferObject(m_fboSize, format);
308 if (!m_image.isNull() && !m_dirtyGeometry)
311 m_image = QImage(m_size, QImage::Format_ARGB32_Premultiplied);
312 m_image.fill(Qt::transparent);
315 QSGPainterTexture *texture = new QSGPainterTexture;
316 if (m_actualRenderTarget == QQuickPaintedItem::Image) {
317 texture->setOwnsTexture(true);
318 texture->setTextureSize(m_size);
320 texture->setTextureId(m_fbo->texture());
321 texture->setOwnsTexture(false);
322 texture->setTextureSize(m_fboSize);
328 texture->setTextureSize(m_size);
332 void QSGPainterNode::updateFBOSize()
336 if (m_fastFBOResizing) {
337 fboWidth = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.width()));
338 fboHeight = qMax(QT_MINIMUM_DYNAMIC_FBO_SIZE, qt_next_power_of_two(m_size.height()));
340 QSize minimumFBOSize = m_context->minimumFBOSize();
341 fboWidth = qMax(minimumFBOSize.width(), m_size.width());
342 fboHeight = qMax(minimumFBOSize.height(), m_size.height());
345 m_fboSize = QSize(fboWidth, fboHeight);
348 void QSGPainterNode::setPreferredRenderTarget(QQuickPaintedItem::RenderTarget target)
350 if (m_preferredRenderTarget == target)
353 m_preferredRenderTarget = target;
355 m_dirtyRenderTarget = true;
356 m_dirtyGeometry = true;
357 m_dirtyTexture = true;
360 void QSGPainterNode::setSize(const QSize &size)
369 m_dirtyRenderTarget = m_fbo->size() != m_fboSize || m_dirtyRenderTarget;
371 m_dirtyRenderTarget = true;
372 m_dirtyGeometry = true;
373 m_dirtyTexture = true;
376 void QSGPainterNode::setDirty(bool d, const QRect &dirtyRect)
379 m_dirtyRect = dirtyRect;
382 m_dirtyTexture = true;
384 markDirty(DirtyMaterial);
387 void QSGPainterNode::setOpaquePainting(bool opaque)
389 if (opaque == m_opaquePainting)
392 m_opaquePainting = opaque;
393 m_dirtyTexture = true;
396 void QSGPainterNode::setLinearFiltering(bool linearFiltering)
398 if (linearFiltering == m_linear_filtering)
401 m_linear_filtering = linearFiltering;
403 m_material.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
404 m_materialO.setFiltering(linearFiltering ? QSGTexture::Linear : QSGTexture::Nearest);
405 markDirty(DirtyMaterial);
408 void QSGPainterNode::setMipmapping(bool mipmapping)
410 if (mipmapping == m_mipmapping)
413 m_mipmapping = mipmapping;
414 m_material.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
415 m_materialO.setMipmapFiltering(mipmapping ? QSGTexture::Linear : QSGTexture::None);
416 m_dirtyTexture = true;
419 void QSGPainterNode::setSmoothPainting(bool s)
421 if (s == m_smoothPainting)
424 m_smoothPainting = s;
425 m_dirtyRenderTarget = true;
428 void QSGPainterNode::setFillColor(const QColor &c)
430 if (c == m_fillColor)
434 markDirty(DirtyMaterial);
437 void QSGPainterNode::setContentsScale(qreal s)
439 if (s == m_contentsScale)
443 markDirty(DirtyMaterial);
446 void QSGPainterNode::setFastFBOResizing(bool dynamic)
448 m_fastFBOResizing = dynamic;
451 QImage QSGPainterNode::toImage() const
453 if (m_actualRenderTarget == QQuickPaintedItem::Image)
456 return m_fbo->toImage();