/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtOpenGL 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 #include #include #include #include #include #include #include #include #include #include "qdebug.h" #ifdef Q_WS_X11 #include #include #ifndef QT_OPENGL_ES #include #include #endif #endif //Q_WS_X11 #include #include #include #include #include #include #include #ifndef QT_OPENGL_ES_2 #include #endif #ifndef GLX_ARB_multisample #define GLX_SAMPLE_BUFFERS_ARB 100000 #define GLX_SAMPLES_ARB 100001 #endif #ifndef QT_NO_EGL #include #endif QT_BEGIN_NAMESPACE // // QGLGraphicsSystem // #ifdef Q_WS_WIN extern Q_GUI_EXPORT bool qt_win_owndc_required; #endif QGLGraphicsSystem::QGLGraphicsSystem(bool useX11GL) : QGraphicsSystem(), m_useX11GL(useX11GL) { #if defined(Q_WS_X11) && !defined(QT_OPENGL_ES) // only override the system defaults if the user hasn't already // picked a visual if (X11->visual == 0 && X11->visual_id == -1 && X11->visual_class == -1) { // find a double buffered, RGBA visual that supports OpenGL // and set that as the default visual for windows in Qt int i = 0; int spec[16]; spec[i++] = GLX_RGBA; spec[i++] = GLX_DOUBLEBUFFER; if (!qgetenv("QT_GL_SWAPBUFFER_PRESERVE").isNull()) { spec[i++] = GLX_DEPTH_SIZE; spec[i++] = 8; spec[i++] = GLX_STENCIL_SIZE; spec[i++] = 8; spec[i++] = GLX_SAMPLE_BUFFERS_ARB; spec[i++] = 1; spec[i++] = GLX_SAMPLES_ARB; spec[i++] = 4; } spec[i++] = XNone; XVisualInfo *vi = glXChooseVisual(X11->display, X11->defaultScreen, spec); if (vi) { X11->visual_id = vi->visualid; X11->visual_class = vi->c_class; QGLFormat format; int res; glXGetConfig(X11->display, vi, GLX_LEVEL, &res); format.setPlane(res); glXGetConfig(X11->display, vi, GLX_DOUBLEBUFFER, &res); format.setDoubleBuffer(res); glXGetConfig(X11->display, vi, GLX_DEPTH_SIZE, &res); format.setDepth(res); if (format.depth()) format.setDepthBufferSize(res); glXGetConfig(X11->display, vi, GLX_RGBA, &res); format.setRgba(res); glXGetConfig(X11->display, vi, GLX_RED_SIZE, &res); format.setRedBufferSize(res); glXGetConfig(X11->display, vi, GLX_GREEN_SIZE, &res); format.setGreenBufferSize(res); glXGetConfig(X11->display, vi, GLX_BLUE_SIZE, &res); format.setBlueBufferSize(res); glXGetConfig(X11->display, vi, GLX_ALPHA_SIZE, &res); format.setAlpha(res); if (format.alpha()) format.setAlphaBufferSize(res); glXGetConfig(X11->display, vi, GLX_ACCUM_RED_SIZE, &res); format.setAccum(res); if (format.accum()) format.setAccumBufferSize(res); glXGetConfig(X11->display, vi, GLX_STENCIL_SIZE, &res); format.setStencil(res); if (format.stencil()) format.setStencilBufferSize(res); glXGetConfig(X11->display, vi, GLX_STEREO, &res); format.setStereo(res); glXGetConfig(X11->display, vi, GLX_SAMPLE_BUFFERS_ARB, &res); format.setSampleBuffers(res); if (format.sampleBuffers()) { glXGetConfig(X11->display, vi, GLX_SAMPLES_ARB, &res); format.setSamples(res); } QGLWindowSurface::surfaceFormat = format; XFree(vi); printf("using visual class %x, id %x\n", X11->visual_class, X11->visual_id); } } #elif defined(Q_WS_WIN) QGLWindowSurface::surfaceFormat.setDoubleBuffer(true); qt_win_owndc_required = true; #endif } // // QGLWindowSurface // #ifndef Q_WS_QPA class QGLGlobalShareWidget { public: QGLGlobalShareWidget() : widget(0), initializing(false) {} QGLWidget *shareWidget() { if (!initializing && !widget && !cleanedUp) { initializing = true; widget = new QGLWidget(QGLFormat(QGL::SingleBuffer | QGL::NoDepthBuffer | QGL::NoStencilBuffer)); widget->resize(1, 1); // We don't need this internal widget to appear in QApplication::topLevelWidgets() if (QWidgetPrivate::allWidgets) QWidgetPrivate::allWidgets->remove(widget); initializing = false; } return widget; } // destroys the share widget and prevents recreation void cleanup() { QGLWidget *w = widget; cleanedUp = true; widget = 0; delete w; } // destroys the share widget, but allows it to be recreated later on void destroy() { if (cleanedUp) return; QGLWidget *w = widget; // prevent potential recursions cleanedUp = true; widget = 0; delete w; cleanedUp = false; } static bool cleanedUp; private: QGLWidget *widget; bool initializing; }; bool QGLGlobalShareWidget::cleanedUp = false; static void qt_cleanup_gl_share_widget(); Q_GLOBAL_STATIC_WITH_INITIALIZER(QGLGlobalShareWidget, _qt_gl_share_widget, { qAddPostRoutine(qt_cleanup_gl_share_widget); }) static void qt_cleanup_gl_share_widget() { _qt_gl_share_widget()->cleanup(); } QGLWidget* qt_gl_share_widget() { if (QGLGlobalShareWidget::cleanedUp) return 0; return _qt_gl_share_widget()->shareWidget(); } void qt_destroy_gl_share_widget() { _qt_gl_share_widget()->destroy(); } #endif//Q_WS_QPA const QGLContext *qt_gl_share_context() { #ifdef Q_WS_QPA //make it possible to have an assesor to defaultSharedGLContext. const QPlatformGLContext *platformContext = QPlatformGLContext::defaultSharedContext(); if (!platformContext) qDebug() << "Please implement a defaultSharedContext for your platformplugin"; return QGLContext::fromPlatformGLContext(const_cast(platformContext)); #else QGLWidget *widget = qt_gl_share_widget(); if (widget) return widget->context(); return 0; #endif } struct QGLWindowSurfacePrivate { QGLFramebufferObject *fbo; QGLPixelBuffer *pb; GLuint tex_id; GLuint pb_tex_id; int tried_fbo : 1; int tried_pb : 1; int destructive_swap_buffers : 1; int geometry_updated : 1; int did_paint : 1; QGLContext *ctx; QList contexts; QRegion paintedRegion; QSize size; QSize textureSize; QList buffers; QGLWindowSurfaceGLPaintDevice glDevice; QGLWindowSurface* q_ptr; }; QGLFormat QGLWindowSurface::surfaceFormat; QGLWindowSurface::SwapMode QGLWindowSurface::swapBehavior = QGLWindowSurface::AutomaticSwap; void QGLWindowSurfaceGLPaintDevice::endPaint() { glFlush(); QGLPaintDevice::endPaint(); } QSize QGLWindowSurfaceGLPaintDevice::size() const { return d->size; } QGLContext* QGLWindowSurfaceGLPaintDevice::context() const { return d->ctx; } int QGLWindowSurfaceGLPaintDevice::metric(PaintDeviceMetric m) const { return qt_paint_device_metric(d->q_ptr->window(), m); } QPaintEngine *QGLWindowSurfaceGLPaintDevice::paintEngine() const { return qt_qgl_paint_engine(); } QGLWindowSurface::QGLWindowSurface(QWidget *window) : QWindowSurface(window), d_ptr(new QGLWindowSurfacePrivate) { // Q_ASSERT(window->isTopLevel()); d_ptr->pb = 0; d_ptr->fbo = 0; d_ptr->ctx = 0; d_ptr->tex_id = 0; #if defined (QT_OPENGL_ES_2) d_ptr->tried_fbo = true; d_ptr->tried_pb = true; #else d_ptr->tried_fbo = false; d_ptr->tried_pb = false; #endif d_ptr->destructive_swap_buffers = qgetenv("QT_GL_SWAPBUFFER_PRESERVE").isNull(); d_ptr->glDevice.d = d_ptr; d_ptr->q_ptr = this; d_ptr->geometry_updated = false; d_ptr->did_paint = false; } QGLWindowSurface::~QGLWindowSurface() { if (d_ptr->ctx) glDeleteTextures(1, &d_ptr->tex_id); #ifndef Q_WS_QPA // Dont delete the contexts. Destroying the window does that for us foreach(QGLContext **ctx, d_ptr->contexts) { delete *ctx; *ctx = 0; } #endif delete d_ptr->pb; delete d_ptr->fbo; delete d_ptr; } void QGLWindowSurface::deleted(QObject *object) { QWidget *widget = qobject_cast(object); if (widget) { if (widget == window()) { // Make sure that the fbo is destroyed before destroying its context. delete d_ptr->fbo; d_ptr->fbo = 0; } #ifndef Q_WS_QPA //no need to specifically delete the QGLContext as it will be deleted by QWidget QWidgetPrivate *widgetPrivate = widget->d_func(); if (widgetPrivate->extraData()) { union { QGLContext **ctxPtrPtr; void **voidPtrPtr; }; voidPtrPtr = &widgetPrivate->extraData()->glContext; int index = d_ptr->contexts.indexOf(ctxPtrPtr); if (index != -1) { delete *ctxPtrPtr; *ctxPtrPtr = 0; d_ptr->contexts.removeAt(index); } } #endif } } void QGLWindowSurface::hijackWindow(QWidget *widget) { QWidgetPrivate *widgetPrivate = widget->d_func(); widgetPrivate->createExtra(); if (widgetPrivate->extraData()->glContext) return; QGLContext *ctx = NULL; // For translucent top-level widgets we need alpha in the format. if (widget->testAttribute(Qt::WA_TranslucentBackground)) { QGLFormat modFormat(surfaceFormat); modFormat.setSampleBuffers(false); modFormat.setSamples(0); modFormat.setAlpha(true); ctx = new QGLContext(modFormat, widget); } else ctx = new QGLContext(surfaceFormat, widget); ctx->create(qt_gl_share_context()); #ifndef QT_NO_EGL static bool checkedForNOKSwapRegion = false; static bool haveNOKSwapRegion = false; if (!checkedForNOKSwapRegion) { haveNOKSwapRegion = QEgl::hasExtension("EGL_NOK_swap_region2"); checkedForNOKSwapRegion = true; if (haveNOKSwapRegion) qDebug() << "Found EGL_NOK_swap_region2 extension. Using partial updates."; } if (ctx->d_func()->eglContext->configAttrib(EGL_SWAP_BEHAVIOR) != EGL_BUFFER_PRESERVED && ! haveNOKSwapRegion) setPartialUpdateSupport(false); // Force full-screen updates else setPartialUpdateSupport(true); #else setPartialUpdateSupport(false); #endif widgetPrivate->extraData()->glContext = ctx; union { QGLContext **ctxPtrPtr; void **voidPtrPtr; }; connect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(deleted(QObject*))); voidPtrPtr = &widgetPrivate->extraData()->glContext; d_ptr->contexts << ctxPtrPtr; qDebug() << "hijackWindow() context created for" << widget << d_ptr->contexts.size(); } QGLContext *QGLWindowSurface::context() const { return d_ptr->ctx; } QPaintDevice *QGLWindowSurface::paintDevice() { updateGeometry(); if (d_ptr->pb) return d_ptr->pb; if (d_ptr->ctx) return &d_ptr->glDevice; QGLContext *ctx = reinterpret_cast(window()->d_func()->extraData()->glContext); ctx->makeCurrent(); Q_ASSERT(d_ptr->fbo); return d_ptr->fbo; } static void drawTexture(const QRectF &rect, GLuint tex_id, const QSize &texSize, const QRectF &src = QRectF()); void QGLWindowSurface::beginPaint(const QRegion &) { d_ptr->did_paint = true; if (!context()) return; int clearFlags = 0; if (context()->d_func()->workaround_needsFullClearOnEveryFrame) clearFlags = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT; else if (context()->format().alpha()) clearFlags = GL_COLOR_BUFFER_BIT; if (clearFlags) { glClearColor(0.0, 0.0, 0.0, 0.0); glClear(clearFlags); } } void QGLWindowSurface::endPaint(const QRegion &rgn) { if (context()) d_ptr->paintedRegion |= rgn; d_ptr->buffers.clear(); } static void blitTexture(QGLContext *ctx, GLuint texture, const QSize &viewport, const QSize &texSize, const QRect &targetRect, const QRect &sourceRect) { glDisable(GL_DEPTH_TEST); glDisable(GL_SCISSOR_TEST); glDisable(GL_BLEND); glViewport(0, 0, viewport.width(), viewport.height()); QGLShaderProgram *blitProgram = QGLEngineSharedShaders::shadersForContext(ctx)->blitProgram(); blitProgram->bind(); blitProgram->setUniformValue("imageTexture", 0 /*QT_IMAGE_TEXTURE_UNIT*/); // The shader manager's blit program does not multiply the // vertices by the pmv matrix, so we need to do the effect // of the orthographic projection here ourselves. QRectF r; qreal w = viewport.width(); qreal h = viewport.height(); r.setLeft((targetRect.left() / w) * 2.0f - 1.0f); if (targetRect.right() == (viewport.width() - 1)) r.setRight(1.0f); else r.setRight((targetRect.right() / w) * 2.0f - 1.0f); r.setBottom((targetRect.top() / h) * 2.0f - 1.0f); if (targetRect.bottom() == (viewport.height() - 1)) r.setTop(1.0f); else r.setTop((targetRect.bottom() / w) * 2.0f - 1.0f); drawTexture(r, texture, texSize, sourceRect); } void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &offset) { //### Find out why d_ptr->geometry_updated isn't always false. // flush() should not be called when d_ptr->geometry_updated is true. It assumes that either // d_ptr->fbo or d_ptr->pb is allocated and has the correct size. if (d_ptr->geometry_updated) return; // did_paint is set to true in ::beginPaint. ::beginPaint means that we // at least cleared the background (= painted something). In EGL API it's a // mistake to call swapBuffers if nothing was painted unless // EGL_BUFFER_PRESERVED is set. This check protects the flush func from // being executed if it's for nothing. if (!hasPartialUpdateSupport() && !d_ptr->did_paint) return; QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget(); Q_ASSERT(parent); #if !defined(Q_WS_QPA) if (!geometry().isValid()) return; #else if (!size().isValid()) return; #endif // Needed to support native child-widgets... hijackWindow(parent); QRect br = rgn.boundingRect().translated(offset); br = br.intersected(window()->rect()); QPoint wOffset = qt_qwidget_data(parent)->wrect.topLeft(); QRect rect = br.translated(-offset - wOffset); const GLenum target = GL_TEXTURE_2D; Q_UNUSED(target); if (QGLWindowSurface::swapBehavior == QGLWindowSurface::KillSwap) return; if (context()) { context()->makeCurrent(); if (context()->format().doubleBuffer()) { #if !defined(QT_OPENGL_ES_2) if (d_ptr->destructive_swap_buffers) { glBindTexture(target, d_ptr->tex_id); QVector rects = d_ptr->paintedRegion.rects(); for (int i = 0; i < rects.size(); ++i) { QRect br = rects.at(i); if (br.isEmpty()) continue; const uint bottom = window()->height() - (br.y() + br.height()); glCopyTexSubImage2D(target, 0, br.x(), bottom, br.x(), bottom, br.width(), br.height()); } glBindTexture(target, 0); QRegion dirtyRegion = QRegion(window()->rect()) - d_ptr->paintedRegion; if (!dirtyRegion.isEmpty()) { glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glMatrixMode(GL_PROJECTION); glLoadIdentity(); #ifndef QT_OPENGL_ES glOrtho(0, window()->width(), window()->height(), 0, -999999, 999999); #else glOrthof(0, window()->width(), window()->height(), 0, -999999, 999999); #endif glViewport(0, 0, window()->width(), window()->height()); QVector rects = dirtyRegion.rects(); glColor4f(1, 1, 1, 1); for (int i = 0; i < rects.size(); ++i) { QRect rect = rects.at(i); if (rect.isEmpty()) continue; drawTexture(rect, d_ptr->tex_id, window()->size(), rect); } } } #endif bool doingPartialUpdate = false; if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AutomaticSwap) doingPartialUpdate = hasPartialUpdateSupport() && br.width() * br.height() < parent->geometry().width() * parent->geometry().height() * 0.2; else if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AlwaysFullSwap) doingPartialUpdate = false; else if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AlwaysPartialSwap) doingPartialUpdate = hasPartialUpdateSupport(); QGLContext *ctx = reinterpret_cast(parent->d_func()->extraData()->glContext); if (widget != window()) { if (initializeOffscreenTexture(window()->size())) qWarning() << "QGLWindowSurface: Flushing to native child widget, may lead to significant performance loss"; glBindTexture(target, d_ptr->tex_id); const uint bottom = window()->height() - (br.y() + br.height()); glCopyTexSubImage2D(target, 0, br.x(), bottom, br.x(), bottom, br.width(), br.height()); glBindTexture(target, 0); ctx->makeCurrent(); if (doingPartialUpdate) blitTexture(ctx, d_ptr->tex_id, parent->size(), window()->size(), rect, br); else blitTexture(ctx, d_ptr->tex_id, parent->size(), window()->size(), parent->rect(), parent->rect().translated(offset + wOffset)); } if (doingPartialUpdate) ctx->d_func()->swapRegion(br); else ctx->swapBuffers(); d_ptr->paintedRegion = QRegion(); } else { glFlush(); } return; } QGLContext *previous_ctx = const_cast(QGLContext::currentContext()); QGLContext *ctx = reinterpret_cast(parent->d_func()->extraData()->glContext); // QPainter::end() should have unbound the fbo, otherwise something is very wrong... Q_ASSERT(!d_ptr->fbo || !d_ptr->fbo->isBound()); if (ctx != previous_ctx) { ctx->makeCurrent(); } QSize size = widget->rect().size(); if (d_ptr->destructive_swap_buffers && ctx->format().doubleBuffer()) { rect = parent->rect(); br = rect.translated(wOffset + offset); size = parent->size(); } glDisable(GL_SCISSOR_TEST); if (d_ptr->fbo && (QGLExtensions::glExtensions() & QGLExtensions::FramebufferBlit)) { const int h = d_ptr->fbo->height(); const int sx0 = br.left(); const int sx1 = br.left() + br.width(); const int sy0 = h - (br.top() + br.height()); const int sy1 = h - br.top(); const int tx0 = rect.left(); const int tx1 = rect.left() + rect.width(); const int ty0 = parent->height() - (rect.top() + rect.height()); const int ty1 = parent->height() - rect.top(); if (window() == parent || d_ptr->fbo->format().samples() <= 1) { if (ctx->d_ptr->current_fbo != 0) glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0); glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, d_ptr->fbo->handle()); glBlitFramebufferEXT(sx0, sy0, sx1, sy1, tx0, ty0, tx1, ty1, GL_COLOR_BUFFER_BIT, GL_NEAREST); glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, 0); } else { // can't do sub-region blits with multisample FBOs QGLFramebufferObject *temp = qgl_fbo_pool()->acquire(d_ptr->fbo->size(), QGLFramebufferObjectFormat()); glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, temp->handle()); glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, d_ptr->fbo->handle()); glBlitFramebufferEXT(0, 0, d_ptr->fbo->width(), d_ptr->fbo->height(), 0, 0, d_ptr->fbo->width(), d_ptr->fbo->height(), GL_COLOR_BUFFER_BIT, GL_NEAREST); glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, temp->handle()); glBindFramebuffer(GL_DRAW_FRAMEBUFFER_EXT, 0); glBlitFramebufferEXT(sx0, sy0, sx1, sy1, tx0, ty0, tx1, ty1, GL_COLOR_BUFFER_BIT, GL_NEAREST); glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT, 0); qgl_fbo_pool()->release(temp); } ctx->d_ptr->current_fbo = 0; } #if !defined(QT_OPENGL_ES_2) else { GLuint texture; if (d_ptr->fbo) { texture = d_ptr->fbo->texture(); } else { d_ptr->pb->makeCurrent(); glBindTexture(target, d_ptr->pb_tex_id); const uint bottom = window()->height() - (br.y() + br.height()); glCopyTexSubImage2D(target, 0, br.x(), bottom, br.x(), bottom, br.width(), br.height()); texture = d_ptr->pb_tex_id; glBindTexture(target, 0); } glDisable(GL_DEPTH_TEST); if (d_ptr->fbo) { d_ptr->fbo->release(); } else { ctx->makeCurrent(); } glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glMatrixMode(GL_PROJECTION); glLoadIdentity(); #ifndef QT_OPENGL_ES glOrtho(0, size.width(), size.height(), 0, -999999, 999999); #else glOrthof(0, size.width(), size.height(), 0, -999999, 999999); #endif glViewport(0, 0, size.width(), size.height()); glColor4f(1, 1, 1, 1); drawTexture(rect, texture, window()->size(), br); if (d_ptr->fbo) d_ptr->fbo->bind(); } #else // OpenGL/ES 2.0 version of the fbo blit. else if (d_ptr->fbo) { Q_UNUSED(target); if (d_ptr->fbo->isBound()) d_ptr->fbo->release(); blitTexture(ctx, d_ptr->fbo->texture(), size, window()->size(), rect, br); } #endif if (ctx->format().doubleBuffer()) ctx->swapBuffers(); else glFlush(); d_ptr->did_paint = false; } #if !defined(Q_WS_QPA) void QGLWindowSurface::setGeometry(const QRect &rect) { QWindowSurface::setGeometry(rect); d_ptr->geometry_updated = true; } #else void QGLWindowSurface::resize(const QSize &size) { QWindowSurface::resize(size); d_ptr->geometry_updated = true; } #endif void QGLWindowSurface::updateGeometry() { if (!d_ptr->geometry_updated) return; d_ptr->geometry_updated = false; #ifdef Q_WS_QPA QSize surfSize = size(); #else QSize surfSize = geometry().size(); #endif hijackWindow(window()); QGLContext *ctx = reinterpret_cast(window()->d_func()->extraData()->glContext); #ifdef Q_WS_MAC ctx->updatePaintDevice(); #endif const GLenum target = GL_TEXTURE_2D; if (surfSize.width() <= 0 || surfSize.height() <= 0) return; if (d_ptr->size == surfSize) return; d_ptr->size = surfSize; if (d_ptr->ctx) { #ifndef QT_OPENGL_ES_2 if (d_ptr->destructive_swap_buffers) initializeOffscreenTexture(surfSize); #endif return; } if (d_ptr->destructive_swap_buffers && (QGLExtensions::glExtensions() & QGLExtensions::FramebufferObject) && (d_ptr->fbo || !d_ptr->tried_fbo) && qt_gl_preferGL2Engine()) { d_ptr->tried_fbo = true; ctx->d_ptr->internal_context = true; ctx->makeCurrent(); delete d_ptr->fbo; QGLFramebufferObjectFormat format; format.setAttachment(QGLFramebufferObject::CombinedDepthStencil); format.setInternalTextureFormat(GLenum(GL_RGBA)); format.setTextureTarget(target); if (QGLExtensions::glExtensions() & QGLExtensions::FramebufferBlit) format.setSamples(8); d_ptr->fbo = new QGLFramebufferObject(surfSize, format); if (d_ptr->fbo->isValid()) { qDebug() << "Created Window Surface FBO" << surfSize << "with samples" << d_ptr->fbo->format().samples(); return; } else { qDebug() << "QGLWindowSurface: Failed to create valid FBO, falling back"; delete d_ptr->fbo; d_ptr->fbo = 0; } } #if !defined(QT_OPENGL_ES_2) && !defined(Q_WS_QPA) //QPA doesn't support pixelbuffers if (d_ptr->destructive_swap_buffers && (d_ptr->pb || !d_ptr->tried_pb)) { d_ptr->tried_pb = true; if (d_ptr->pb) { d_ptr->pb->makeCurrent(); glDeleteTextures(1, &d_ptr->pb_tex_id); } delete d_ptr->pb; d_ptr->pb = new QGLPixelBuffer(surfSize.width(), surfSize.height(), QGLFormat(QGL::SampleBuffers | QGL::StencilBuffer | QGL::DepthBuffer), qt_gl_share_widget()); if (d_ptr->pb->isValid()) { qDebug() << "Created Window Surface Pixelbuffer, Sample buffers:" << d_ptr->pb->format().sampleBuffers(); d_ptr->pb->makeCurrent(); glGenTextures(1, &d_ptr->pb_tex_id); glBindTexture(target, d_ptr->pb_tex_id); glTexImage2D(target, 0, GL_RGBA, surfSize.width(), surfSize.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glBindTexture(target, 0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0, d_ptr->pb->width(), d_ptr->pb->height(), 0, -999999, 999999); d_ptr->pb->d_ptr->qctx->d_func()->internal_context = true; return; } else { qDebug() << "QGLWindowSurface: Failed to create valid pixelbuffer, falling back"; delete d_ptr->pb; d_ptr->pb = 0; } } #endif // !defined(QT_OPENGL_ES_2) !defined(Q_WS_QPA) ctx->makeCurrent(); #ifndef QT_OPENGL_ES_2 if (d_ptr->destructive_swap_buffers) initializeOffscreenTexture(surfSize); #endif qDebug() << "QGLWindowSurface: Using plain widget as window surface" << this;; d_ptr->ctx = ctx; d_ptr->ctx->d_ptr->internal_context = true; } bool QGLWindowSurface::initializeOffscreenTexture(const QSize &size) { if (size == d_ptr->textureSize) return false; glGenTextures(1, &d_ptr->tex_id); glBindTexture(GL_TEXTURE_2D, d_ptr->tex_id); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, size.width(), size.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glBindTexture(GL_TEXTURE_2D, 0); d_ptr->textureSize = size; return true; } bool QGLWindowSurface::scroll(const QRegion &area, int dx, int dy) { // this code randomly fails currently for unknown reasons return false; if (!d_ptr->pb) return false; d_ptr->pb->makeCurrent(); QRect br = area.boundingRect(); #if 0 // ## workaround driver issue (scrolling by these deltas is unbearably slow for some reason) // ## maybe we should use glCopyTexSubImage insteadk if (dx == 1 || dx == -1 || dy == 1 || dy == -1 || dy == 2) return false; glRasterPos2i(br.x() + dx, br.y() + br.height() + dy); glCopyPixels(br.x(), d_ptr->pb->height() - (br.y() + br.height()), br.width(), br.height(), GL_COLOR); return true; #endif const GLenum target = GL_TEXTURE_2D; glBindTexture(target, d_ptr->tex_id); glCopyTexImage2D(target, 0, GL_RGBA, br.x(), d_ptr->pb->height() - (br.y() + br.height()), br.width(), br.height(), 0); glBindTexture(target, 0); drawTexture(br.translated(dx, dy), d_ptr->tex_id, window()->size()); return true; } static void drawTexture(const QRectF &rect, GLuint tex_id, const QSize &texSize, const QRectF &br) { const GLenum target = GL_TEXTURE_2D; QRectF src = br.isEmpty() ? QRectF(QPointF(), texSize) : QRectF(QPointF(br.x(), texSize.height() - br.bottom()), br.size()); if (target == GL_TEXTURE_2D) { qreal width = texSize.width(); qreal height = texSize.height(); src.setLeft(src.left() / width); src.setRight(src.right() / width); src.setTop(src.top() / height); src.setBottom(src.bottom() / height); } const GLfloat tx1 = src.left(); const GLfloat tx2 = src.right(); const GLfloat ty1 = src.top(); const GLfloat ty2 = src.bottom(); GLfloat texCoordArray[4*2] = { tx1, ty2, tx2, ty2, tx2, ty1, tx1, ty1 }; GLfloat vertexArray[4*2]; extern void qt_add_rect_to_array(const QRectF &r, GLfloat *array); // qpaintengine_opengl.cpp qt_add_rect_to_array(rect, vertexArray); #if !defined(QT_OPENGL_ES_2) glVertexPointer(2, GL_FLOAT, 0, vertexArray); glTexCoordPointer(2, GL_FLOAT, 0, texCoordArray); glBindTexture(target, tex_id); glEnable(target); glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glDrawArrays(GL_TRIANGLE_FAN, 0, 4); glDisableClientState(GL_VERTEX_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisable(target); glBindTexture(target, 0); #else glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, vertexArray); glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, texCoordArray); glBindTexture(target, tex_id); glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glEnableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); glDrawArrays(GL_TRIANGLE_FAN, 0, 4); glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glDisableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); glBindTexture(target, 0); #endif } QImage *QGLWindowSurface::buffer(const QWidget *widget) { QImage image; if (d_ptr->pb) image = d_ptr->pb->toImage(); else if (d_ptr->fbo) image = d_ptr->fbo->toImage(); if (image.isNull()) return 0; QRect rect = widget->rect(); rect.translate(widget->mapTo(widget->window(), QPoint())); QImage subImage = image.copy(rect); d_ptr->buffers << subImage; return &d_ptr->buffers.last(); } QT_END_NAMESPACE