diff options
Diffstat (limited to 'src/opengl/qgl_x11egl.cpp')
| -rw-r--r-- | src/opengl/qgl_x11egl.cpp | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp new file mode 100644 index 0000000000..2ddfd35f8d --- /dev/null +++ b/src/opengl/qgl_x11egl.cpp @@ -0,0 +1,548 @@ +/**************************************************************************** +** +** 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 "qgl.h" +#include <private/qt_x11_p.h> +#include <private/qpixmap_x11_p.h> +#include <private/qgl_p.h> +#include <private/qpaintengine_opengl_p.h> +#include "qgl_egl_p.h" +#include "qcolormap.h" +#include <QDebug> +#include <QPixmap> + + +QT_BEGIN_NAMESPACE + + +/* + QGLTemporaryContext implementation +*/ + +class QGLTemporaryContextPrivate +{ +public: + bool initialized; + Window window; + EGLContext context; + EGLSurface surface; + EGLDisplay display; +}; + +QGLTemporaryContext::QGLTemporaryContext(bool, QWidget *) + : d(new QGLTemporaryContextPrivate) +{ + d->initialized = false; + d->window = 0; + d->context = 0; + d->surface = 0; + int screen = 0; + + d->display = QEgl::display(); + + EGLConfig config; + int numConfigs = 0; + EGLint attribs[] = { + EGL_SURFACE_TYPE, EGL_WINDOW_BIT, +#ifdef QT_OPENGL_ES_2 + EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, +#endif + EGL_NONE + }; + + eglChooseConfig(d->display, attribs, &config, 1, &numConfigs); + if (!numConfigs) { + qWarning("QGLTemporaryContext: No EGL configurations available."); + return; + } + + XVisualInfo visualInfo; + XVisualInfo *vi; + int numVisuals; + + visualInfo.visualid = QEgl::getCompatibleVisualId(config); + vi = XGetVisualInfo(X11->display, VisualIDMask, &visualInfo, &numVisuals); + if (!vi || numVisuals < 1) { + qWarning("QGLTemporaryContext: Unable to get X11 visual info id."); + return; + } + + XSetWindowAttributes attr; + unsigned long mask; + attr.background_pixel = 0; + attr.border_pixel = 0; + attr.colormap = XCreateColormap(X11->display, DefaultRootWindow(X11->display), vi->visual, AllocNone); + attr.event_mask = StructureNotifyMask | ExposureMask; + mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; + + d->window = XCreateWindow(X11->display, RootWindow(X11->display, screen), + 0, 0, 1, 1, 0, + vi->depth, InputOutput, vi->visual, + mask, &attr); + + d->surface = eglCreateWindowSurface(d->display, config, (EGLNativeWindowType) d->window, NULL); + + if (d->surface == EGL_NO_SURFACE) { + qWarning("QGLTemporaryContext: Error creating EGL surface."); + XFree(vi); + XDestroyWindow(X11->display, d->window); + return; + } + + EGLint contextAttribs[] = { +#ifdef QT_OPENGL_ES_2 + EGL_CONTEXT_CLIENT_VERSION, 2, +#endif + EGL_NONE + }; + d->context = eglCreateContext(d->display, config, 0, contextAttribs); + if (d->context != EGL_NO_CONTEXT + && eglMakeCurrent(d->display, d->surface, d->surface, d->context)) + { + d->initialized = true; + } else { + qWarning("QGLTemporaryContext: Error creating EGL context."); + eglDestroySurface(d->display, d->surface); + XDestroyWindow(X11->display, d->window); + } + XFree(vi); +} + +QGLTemporaryContext::~QGLTemporaryContext() +{ + if (d->initialized) { + eglMakeCurrent(d->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); + eglDestroyContext(d->display, d->context); + eglDestroySurface(d->display, d->surface); + XDestroyWindow(X11->display, d->window); + } +} + +bool QGLFormat::hasOpenGLOverlays() +{ + return false; +} + +// Chooses the EGL config and creates the EGL context +bool QGLContext::chooseContext(const QGLContext* shareContext) +{ + Q_D(QGLContext); + + if (!device()) + return false; + + int devType = device()->devType(); + + QX11PixmapData *x11PixmapData = 0; + if (devType == QInternal::Pixmap) { + QPixmapData *pmd = static_cast<QPixmap*>(device())->data_ptr().data(); + if (pmd->classId() == QPixmapData::X11Class) + x11PixmapData = static_cast<QX11PixmapData*>(pmd); + else { + // TODO: Replace the pixmap's data with a new QX11PixmapData + qWarning("WARNING: Creating a QGLContext on a QPixmap is only supported for X11 pixmap backend"); + return false; + } + } else if ((devType != QInternal::Widget) && (devType != QInternal::Pbuffer)) { + qWarning("WARNING: Creating a QGLContext not supported on device type %d", devType); + return false; + } + + // Only create the eglContext if we don't already have one: + if (d->eglContext == 0) { + d->eglContext = new QEglContext(); + d->ownsEglContext = true; + d->eglContext->setApi(QEgl::OpenGL); + + // If the device is a widget with WA_TranslucentBackground set, make sure the glFormat + // has the alpha channel option set: + if (devType == QInternal::Widget) { + QWidget* widget = static_cast<QWidget*>(device()); + if (widget->testAttribute(Qt::WA_TranslucentBackground)) + d->glFormat.setAlpha(true); + } + + // Construct the configuration we need for this surface. + QEglProperties configProps; + configProps.setDeviceType(devType); + configProps.setRenderableType(QEgl::OpenGL); + qt_eglproperties_set_glformat(configProps, d->glFormat); + + // Set buffer preserved for regular QWidgets, QGLWidgets are ok with either preserved or destroyed: + if ((devType == QInternal::Widget) && qobject_cast<QGLWidget*>(static_cast<QWidget*>(device())) == 0) + configProps.setValue(EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED); + + if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) { + delete d->eglContext; + d->eglContext = 0; + return false; + } + + // Create a new context for the configuration. + QEglContext* eglSharedContext = shareContext ? shareContext->d_func()->eglContext : 0; + if (!d->eglContext->createContext(eglSharedContext)) { + delete d->eglContext; + d->eglContext = 0; + return false; + } + d->sharing = d->eglContext->isSharing(); + if (d->sharing && shareContext) + const_cast<QGLContext *>(shareContext)->d_func()->sharing = true; + } + + // Inform the higher layers about the actual format properties + qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config()); + + // Do don't create the EGLSurface for everything. + // QWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface + // QGLWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface + // QPixmap - yes, create the EGLSurface but store it in QX11PixmapData::gl_surface + // QGLPixelBuffer - no, it creates the surface itself and stores it in QGLPixelBufferPrivate::pbuf + + if (devType == QInternal::Widget) { + if (d->eglSurface != EGL_NO_SURFACE) + eglDestroySurface(d->eglContext->display(), d->eglSurface); + // extraWindowSurfaceCreationProps default to NULL unless were specifically set before + d->eglSurface = QEgl::createSurface(device(), d->eglContext->config(), d->extraWindowSurfaceCreationProps); + XFlush(X11->display); + setWindowCreated(true); + } + + if (x11PixmapData) { + // TODO: Actually check to see if the existing surface can be re-used + if (x11PixmapData->gl_surface) + eglDestroySurface(d->eglContext->display(), (EGLSurface)x11PixmapData->gl_surface); + + x11PixmapData->gl_surface = (void*)QEgl::createSurface(device(), d->eglContext->config()); + } + + return true; +} + +void QGLWidget::resizeEvent(QResizeEvent *) +{ + Q_D(QGLWidget); + if (!isValid()) + return; + makeCurrent(); + if (!d->glcx->initialized()) + glInit(); + resizeGL(width(), height()); + //handle overlay +} + +const QGLContext* QGLWidget::overlayContext() const +{ + return 0; +} + +void QGLWidget::makeOverlayCurrent() +{ + //handle overlay +} + +void QGLWidget::updateOverlayGL() +{ + //handle overlay +} + +void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext, bool deleteOldContext) +{ + Q_D(QGLWidget); + if (context == 0) { + qWarning("QGLWidget::setContext: Cannot set null context"); + return; + } + if (!context->deviceIsPixmap() && context->device() != this) { + qWarning("QGLWidget::setContext: Context must refer to this widget"); + return; + } + + if (d->glcx) + d->glcx->doneCurrent(); + QGLContext* oldcx = d->glcx; + d->glcx = context; + + bool createFailed = false; + if (!d->glcx->isValid()) { + // Create the QGLContext here, which in turn chooses the EGL config + // and creates the EGL context: + if (!d->glcx->create(shareContext ? shareContext : oldcx)) + createFailed = true; + } + if (createFailed) { + if (deleteOldContext) + delete oldcx; + return; + } + + + d->eglSurfaceWindowId = winId(); // Remember the window id we created the surface for +} + +void QGLWidgetPrivate::init(QGLContext *context, const QGLWidget* shareWidget) +{ + Q_Q(QGLWidget); + + initContext(context, shareWidget); + + if (q->isValid() && glcx->format().hasOverlay()) { + //no overlay + qWarning("QtOpenGL ES doesn't currently support overlays"); + } +} + +void QGLWidgetPrivate::cleanupColormaps() +{ +} + +const QGLColormap & QGLWidget::colormap() const +{ + return d_func()->cmap; +} + +void QGLWidget::setColormap(const QGLColormap &) +{ +} + +// Re-creates the EGL surface if the window ID has changed or if there isn't a surface +void QGLWidgetPrivate::recreateEglSurface() +{ + Q_Q(QGLWidget); + + Window currentId = q->winId(); + + // If the window ID has changed since the surface was created, we need to delete the + // old surface before re-creating a new one. Note: This should not be the case as the + // surface should be deleted before the old window id. + if (glcx->d_func()->eglSurface != EGL_NO_SURFACE && (currentId != eglSurfaceWindowId)) { + qWarning("EGL surface for deleted window %lx was not destroyed", uint(eglSurfaceWindowId)); + glcx->d_func()->destroyEglSurfaceForDevice(); + } + + if (glcx->d_func()->eglSurface == EGL_NO_SURFACE) { + glcx->d_func()->eglSurface = glcx->d_func()->eglContext->createSurface(q); + eglSurfaceWindowId = currentId; + } +} + + +QGLTexture *QGLContextPrivate::bindTextureFromNativePixmap(QPixmap *pixmap, const qint64 key, + QGLContext::BindOptions options) +{ + Q_Q(QGLContext); + + // The EGL texture_from_pixmap has no facility to invert the y coordinate + if (!(options & QGLContext::CanFlipNativePixmapBindOption)) + return 0; + + + static bool checkedForTFP = false; + static bool haveTFP = false; + static bool checkedForEglImageTFP = false; + static bool haveEglImageTFP = false; + + + if (!checkedForEglImageTFP) { + checkedForEglImageTFP = true; + + // We need to be able to create an EGLImage from a native pixmap, which was split + // into a separate EGL extension, EGL_KHR_image_pixmap. It is possible to have + // eglCreateImageKHR & eglDestroyImageKHR without support for pixmaps, so we must + // check we have the EGLImage from pixmap functionality. + if (QEgl::hasExtension("EGL_KHR_image") || QEgl::hasExtension("EGL_KHR_image_pixmap")) { + + // Being able to create an EGLImage from a native pixmap is also pretty useless + // without the ability to bind that EGLImage as a texture, which is provided by + // the GL_OES_EGL_image extension, which we try to resolve here: + haveEglImageTFP = qt_resolve_eglimage_gl_extensions(q); + + if (haveEglImageTFP) + qDebug("Found EGL_KHR_image_pixmap & GL_OES_EGL_image extensions (preferred method)!"); + } + } + + if (!checkedForTFP) { + // Check for texture_from_pixmap egl extension + checkedForTFP = true; + if (QEgl::hasExtension("EGL_NOKIA_texture_from_pixmap") || + QEgl::hasExtension("EGL_EXT_texture_from_pixmap")) + { + qDebug("Found texture_from_pixmap EGL extension!"); + haveTFP = true; + } + } + + if (!haveTFP && !haveEglImageTFP) + return 0; + + + QX11PixmapData *pixmapData = static_cast<QX11PixmapData*>(pixmap->data_ptr().data()); + Q_ASSERT(pixmapData->classId() == QPixmapData::X11Class); + bool hasAlpha = pixmapData->hasAlphaChannel(); + bool pixmapHasValidSurface = false; + bool textureIsBound = false; + GLuint textureId; + glGenTextures(1, &textureId); + glBindTexture(GL_TEXTURE_2D, textureId); + + if (haveTFP && pixmapData->gl_surface && + hasAlpha == (pixmapData->flags & QX11PixmapData::GlSurfaceCreatedWithAlpha)) + { + pixmapHasValidSurface = true; + } + + // If we already have a valid EGL surface for the pixmap, we should use it + if (pixmapHasValidSurface) { + EGLBoolean success; + success = eglBindTexImage(QEgl::display(), (EGLSurface)pixmapData->gl_surface, EGL_BACK_BUFFER); + if (success == EGL_FALSE) { + qWarning() << "eglBindTexImage() failed:" << QEgl::errorString(); + eglDestroySurface(QEgl::display(), (EGLSurface)pixmapData->gl_surface); + pixmapData->gl_surface = (void*)EGL_NO_SURFACE; + } else + textureIsBound = true; + } + + // If the pixmap doesn't already have a valid surface, try binding it via EGLImage + // first, as going through EGLImage should be faster and better supported: + if (!textureIsBound && haveEglImageTFP) { + EGLImageKHR eglImage; + + EGLint attribs[] = { + EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, + EGL_NONE + }; + eglImage = QEgl::eglCreateImageKHR(QEgl::display(), EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, + (EGLClientBuffer)QEgl::nativePixmap(pixmap), attribs); + + QGLContext* ctx = q; + glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eglImage); + + GLint err = glGetError(); + if (err == GL_NO_ERROR) + textureIsBound = true; + + // Once the egl image is bound, the texture becomes a new sibling image and we can safely + // destroy the EGLImage we created for the pixmap: + if (eglImage != EGL_NO_IMAGE_KHR) + QEgl::eglDestroyImageKHR(QEgl::display(), eglImage); + } + + if (!textureIsBound && haveTFP) { + // Check to see if the surface is still valid + if (pixmapData->gl_surface && + hasAlpha != (pixmapData->flags & QX11PixmapData::GlSurfaceCreatedWithAlpha)) + { + // Surface is invalid! + destroyGlSurfaceForPixmap(pixmapData); + } + + if (pixmapData->gl_surface == 0) { + EGLConfig config = QEgl::defaultConfig(QInternal::Pixmap, + QEgl::OpenGL, + hasAlpha ? QEgl::Translucent : QEgl::NoOptions); + + pixmapData->gl_surface = (void*)QEgl::createSurface(pixmap, config); + if (pixmapData->gl_surface == (void*)EGL_NO_SURFACE) + return false; + } + + EGLBoolean success; + success = eglBindTexImage(QEgl::display(), (EGLSurface)pixmapData->gl_surface, EGL_BACK_BUFFER); + if (success == EGL_FALSE) { + qWarning() << "eglBindTexImage() failed:" << QEgl::errorString(); + eglDestroySurface(QEgl::display(), (EGLSurface)pixmapData->gl_surface); + pixmapData->gl_surface = (void*)EGL_NO_SURFACE; + haveTFP = false; // If TFP isn't working, disable it's use + } else + textureIsBound = true; + } + + QGLTexture *texture = 0; + + if (textureIsBound) { + texture = new QGLTexture(q, textureId, GL_TEXTURE_2D, options); + pixmapData->flags |= QX11PixmapData::InvertedWhenBoundToTexture; + + // We assume the cost of bound pixmaps is zero + QGLTextureCache::instance()->insert(q, key, texture, 0); + + glBindTexture(GL_TEXTURE_2D, textureId); + } else + glDeleteTextures(1, &textureId); + + return texture; +} + + +void QGLContextPrivate::destroyGlSurfaceForPixmap(QPixmapData* pmd) +{ + Q_ASSERT(pmd->classId() == QPixmapData::X11Class); + QX11PixmapData *pixmapData = static_cast<QX11PixmapData*>(pmd); + if (pixmapData->gl_surface) { + EGLBoolean success; + success = eglDestroySurface(QEgl::display(), (EGLSurface)pixmapData->gl_surface); + if (success == EGL_FALSE) { + qWarning() << "destroyGlSurfaceForPixmap() - Error deleting surface: " + << QEgl::errorString(); + } + pixmapData->gl_surface = 0; + } +} + +void QGLContextPrivate::unbindPixmapFromTexture(QPixmapData* pmd) +{ + Q_ASSERT(pmd->classId() == QPixmapData::X11Class); + QX11PixmapData *pixmapData = static_cast<QX11PixmapData*>(pmd); + if (pixmapData->gl_surface) { + EGLBoolean success; + success = eglReleaseTexImage(QEgl::display(), + (EGLSurface)pixmapData->gl_surface, + EGL_BACK_BUFFER); + if (success == EGL_FALSE) { + qWarning() << "unbindPixmapFromTexture() - Unable to release bound texture: " + << QEgl::errorString(); + } + } +} + +QT_END_NAMESPACE |