| /**************************************************************************** |
| ** |
| ** 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. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU General |
| ** Public License version 3.0 as published by the Free Software Foundation |
| ** and appearing in the file LICENSE.GPL included in the packaging of this |
| ** file. Please review the following information to ensure the GNU General |
| ** Public License version 3.0 requirements will be met: |
| ** http://www.gnu.org/copyleft/gpl.html. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <QtGui/QApplication> |
| #include <QtGui/QColormap> |
| #include <QtGui/QDesktopWidget> |
| #include <QtGui/QPaintDevice> |
| #include <QtGui/QWidget> |
| |
| #include <qglframebufferobject.h> |
| #include <qglpixelbuffer.h> |
| #include <qcolormap.h> |
| #include <qdesktopwidget.h> |
| #include <private/qwidget_p.h> |
| #include "qdebug.h" |
| |
| #ifdef Q_WS_X11 |
| #include <private/qt_x11_p.h> |
| #include <qx11info_x11.h> |
| |
| #ifndef QT_OPENGL_ES |
| #include <GL/glx.h> |
| #include <X11/Xlib.h> |
| #endif |
| #endif //Q_WS_X11 |
| |
| #include <private/qglextensions_p.h> |
| #include <private/qwindowsurface_gl_p.h> |
| |
| #include <private/qgl_p.h> |
| |
| #include <private/qglpixelbuffer_p.h> |
| #include <private/qgraphicssystem_gl_p.h> |
| |
| #include <private/qpaintengineex_opengl2_p.h> |
| #include <private/qpixmapdata_gl_p.h> |
| |
| #ifndef QT_OPENGL_ES_2 |
| #include <private/qpaintengine_opengl_p.h> |
| #endif |
| |
| #ifndef GLX_ARB_multisample |
| #define GLX_SAMPLE_BUFFERS_ARB 100000 |
| #define GLX_SAMPLES_ARB 100001 |
| #endif |
| |
| #ifndef QT_NO_EGL |
| #include <private/qeglcontext_p.h> |
| #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 |
| // |
| 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(); |
| } |
| |
| 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<QGLContext **> contexts; |
| |
| QRegion paintedRegion; |
| QSize size; |
| |
| QSize textureSize; |
| |
| QList<QImage> 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; |
| |
| #ifdef QGL_NO_PRESERVED_SWAP |
| setPartialUpdateSupport(false); |
| #endif |
| } |
| |
| QGLWindowSurface::~QGLWindowSurface() |
| { |
| if (d_ptr->ctx) |
| glDeleteTextures(1, &d_ptr->tex_id); |
| foreach(QGLContext **ctx, d_ptr->contexts) { |
| delete *ctx; |
| *ctx = 0; |
| } |
| |
| delete d_ptr->pb; |
| delete d_ptr->fbo; |
| delete d_ptr; |
| |
| if (QGLGlobalShareWidget::cleanedUp) |
| return; |
| |
| #ifdef Q_OS_SYMBIAN |
| // Destroy the context if necessary. |
| if (!qt_gl_share_widget()->context()->isSharing()) |
| qt_destroy_gl_share_widget(); |
| #endif |
| } |
| |
| void QGLWindowSurface::deleted(QObject *object) |
| { |
| QWidget *widget = qobject_cast<QWidget *>(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; |
| } |
| |
| QWidgetPrivate *widgetPrivate = widget->d_func(); |
| if (widgetPrivate->extraData()) { |
| union { QGLContext **ctxPtr; void **voidPtr; }; |
| voidPtr = &widgetPrivate->extraData()->glContext; |
| int index = d_ptr->contexts.indexOf(ctxPtr); |
| if (index != -1) { |
| delete *ctxPtr; |
| *ctxPtr = 0; |
| d_ptr->contexts.removeAt(index); |
| } |
| } |
| } |
| } |
| |
| 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_widget()->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."; |
| } |
| |
| bool swapBehaviourPreserved = ctx->d_func()->eglContext->configAttrib(EGL_SWAP_BEHAVIOR); |
| if (ctx->d_func()->eglContext->configAttrib(EGL_SURFACE_TYPE)&EGL_SWAP_BEHAVIOR_PRESERVED_BIT) { |
| EGLint swapBehavior; |
| if (eglQuerySurface(ctx->d_func()->eglContext->display(), ctx->d_func()->eglSurface |
| , EGL_SWAP_BEHAVIOR, &swapBehavior)) { |
| swapBehaviourPreserved = (swapBehavior == EGL_BUFFER_PRESERVED); |
| } |
| } |
| |
| if (!swapBehaviourPreserved && !haveNOKSwapRegion) |
| setPartialUpdateSupport(false); // Force full-screen updates |
| else |
| setPartialUpdateSupport(true); |
| #endif |
| |
| widgetPrivate->extraData()->glContext = ctx; |
| |
| union { QGLContext **ctxPtr; void **voidPtr; }; |
| |
| connect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(deleted(QObject*))); |
| |
| voidPtr = &widgetPrivate->extraData()->glContext; |
| d_ptr->contexts << ctxPtr; |
| |
| #ifndef Q_OS_SYMBIAN |
| qDebug() << "hijackWindow() context created for" << widget << d_ptr->contexts.size(); |
| #endif |
| } |
| |
| 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<QGLContext *>(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 &) |
| { |
| updateGeometry(); |
| |
| 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); |
| } |
| |
| d_ptr->did_paint = true; |
| } |
| |
| 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; |
| |
| #ifdef Q_OS_SYMBIAN |
| if (window() != widget) { |
| // For performance reasons we don't support |
| // flushing native child widgets on Symbian. |
| // It breaks overlapping native child widget |
| // rendering in some cases but we prefer performance. |
| return; |
| } |
| #endif |
| |
| |
| QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget(); |
| Q_ASSERT(parent); |
| |
| if (!geometry().isValid()) |
| return; |
| |
| // 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<QRect> 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<QRect> 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<QGLContext *>(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 *>(QGLContext::currentContext()); |
| QGLContext *ctx = reinterpret_cast<QGLContext *>(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 { |
| #ifndef Q_OS_SYMBIAN // We don't have FBO pool on Symbian |
| // 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); |
| #endif // Q_OS_SYMBIAN |
| } |
| |
| 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; |
| } |
| |
| |
| void QGLWindowSurface::setGeometry(const QRect &rect) |
| { |
| QWindowSurface::setGeometry(rect); |
| d_ptr->geometry_updated = true; |
| } |
| |
| |
| void QGLWindowSurface::updateGeometry() { |
| if (!d_ptr->geometry_updated) |
| return; |
| d_ptr->geometry_updated = false; |
| |
| bool hijack(true); |
| QWidgetPrivate *wd = window()->d_func(); |
| if (wd->extraData() && wd->extraData()->glContext) { |
| #ifdef Q_OS_SYMBIAN // Symbian needs to recreate the context when native window size changes |
| if (d_ptr->size != geometry().size()) { |
| QGLContext *ctx = reinterpret_cast<QGLContext *>(wd->extraData()->glContext); |
| |
| if (ctx == QGLContext::currentContext()) |
| ctx->doneCurrent(); |
| |
| ctx->d_func()->destroyEglSurfaceForDevice(); |
| |
| // Delete other contexts (shouldn't happen too often, if at all) |
| while (d_ptr->contexts.size()) { |
| QGLContext **ctxPtrPtr = d_ptr->contexts.takeFirst(); |
| if ((*ctxPtrPtr) != ctx) |
| delete *ctxPtrPtr; |
| } |
| union { QGLContext **ctxPtrPtr; void **voidPtrPtr; }; |
| voidPtrPtr = &wd->extraData()->glContext; |
| d_ptr->contexts << ctxPtrPtr; |
| |
| ctx->d_func()->eglSurface = ctx->d_func()->eglContext->createSurface(window()); |
| |
| // Partial update supported has been decided already in previous hijackWindow call. |
| // Reset swap behaviour based on that flag. |
| if (hasPartialUpdateSupport()) { |
| eglSurfaceAttrib(QEgl::display(), ctx->d_func()->eglSurfaceForDevice(), |
| EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED); |
| |
| if (eglGetError() != EGL_SUCCESS) |
| qWarning("QGLWindowSurface::updateGeometry() - could not re-enable preserved swap behaviour"); |
| } else { |
| eglSurfaceAttrib(QEgl::display(), ctx->d_func()->eglSurfaceForDevice(), |
| EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED); |
| |
| if (eglGetError() != EGL_SUCCESS) |
| qWarning("QGLWindowSurface::updateGeometry() - could not re-enable destroyed swap behaviour"); |
| } |
| } |
| #endif |
| hijack = false; // we already have gl context for widget |
| } |
| |
| if (hijack) |
| hijackWindow(window()); |
| |
| QGLContext *ctx = reinterpret_cast<QGLContext *>(wd->extraData()->glContext); |
| |
| #ifdef Q_WS_MAC |
| ctx->updatePaintDevice(); |
| #endif |
| |
| QSize surfSize = geometry().size(); |
| |
| 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; |
| } |
| |
| const GLenum target = GL_TEXTURE_2D; |
| 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) |
| 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) |
| |
| ctx->makeCurrent(); |
| |
| #ifndef QT_OPENGL_ES_2 |
| if (d_ptr->destructive_swap_buffers) |
| initializeOffscreenTexture(surfSize); |
| #endif |
| #ifndef Q_OS_SYMBIAN |
| qDebug() << "QGLWindowSurface: Using plain widget as window surface" << this; |
| #endif |
| 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 |
| |