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/****************************************************************************
**
** 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 "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 *QGLContext::chooseVisual()
{
qFatal("QGLContext::chooseVisual - this method must not be called as Qt is built with EGL support");
return 0;
}
void *QGLContext::tryVisual(const QGLFormat& f, int bufDepth)
{
Q_UNUSED(f);
Q_UNUSED(bufDepth);
qFatal("QGLContext::tryVisual - this method must not be called as Qt is built with EGL support");
return 0;
}
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
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