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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui 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 <QtCore/qdebug.h>
#include <private/qt_x11_p.h>
#include <QtGui/qx11info_x11.h>
#include <private/qpixmapdata_p.h>
#include <private/qpixmap_x11_p.h>
#include <QtGui/qpaintdevice.h>
#include <QtGui/qpixmap.h>
#include <QtGui/qwidget.h>
#include "qegl_p.h"
#include "qeglcontext_p.h"
QT_BEGIN_NAMESPACE
EGLNativeDisplayType QEgl::nativeDisplay()
{
Display *xdpy = QX11Info::display();
if (!xdpy) {
qWarning("QEglContext::getDisplay(): X11 display is not open");
return EGLNativeDisplayType(EGL_DEFAULT_DISPLAY);
}
return EGLNativeDisplayType(xdpy);
}
static int countBits(unsigned long mask)
{
int count = 0;
while (mask != 0) {
if (mask & 1)
++count;
mask >>= 1;
}
return count;
}
// Set the pixel format parameters from the visual in "xinfo".
void QEglProperties::setVisualFormat(const QX11Info *xinfo)
{
if (!xinfo)
return;
Visual *visual = (Visual*)xinfo->visual();
if (!visual)
return;
if (visual->c_class != TrueColor && visual->c_class != DirectColor)
return;
setValue(EGL_RED_SIZE, countBits(visual->red_mask));
setValue(EGL_GREEN_SIZE, countBits(visual->green_mask));
setValue(EGL_BLUE_SIZE, countBits(visual->blue_mask));
EGLint alphaBits = 0;
#if !defined(QT_NO_XRENDER)
XRenderPictFormat *format;
format = XRenderFindVisualFormat(xinfo->display(), visual);
if (format && (format->type == PictTypeDirect) && format->direct.alphaMask) {
alphaBits = countBits(format->direct.alphaMask);
qDebug("QEglProperties::setVisualFormat() - visual's alphaMask is %d", alphaBits);
}
#endif
setValue(EGL_ALPHA_SIZE, alphaBits);
}
extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
// Set pixel format and other properties based on a paint device.
void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
{
if (!dev)
return;
if (dev->devType() == QInternal::Image)
setPixelFormat(static_cast<QImage *>(dev)->format());
else
setVisualFormat(qt_x11Info(dev));
}
VisualID QEgl::getCompatibleVisualId(EGLConfig config)
{
VisualID visualId = 0;
EGLint eglValue = 0;
EGLint configRedSize = 0;
eglGetConfigAttrib(display(), config, EGL_RED_SIZE, &configRedSize);
EGLint configGreenSize = 0;
eglGetConfigAttrib(display(), config, EGL_GREEN_SIZE, &configGreenSize);
EGLint configBlueSize = 0;
eglGetConfigAttrib(display(), config, EGL_BLUE_SIZE, &configBlueSize);
EGLint configAlphaSize = 0;
eglGetConfigAttrib(display(), config, EGL_ALPHA_SIZE, &configAlphaSize);
eglGetConfigAttrib(display(), config, EGL_BUFFER_SIZE, &eglValue);
int configBitDepth = eglValue;
// See if EGL provided a valid VisualID:
eglGetConfigAttrib(display(), config, EGL_NATIVE_VISUAL_ID, &eglValue);
visualId = (VisualID)eglValue;
if (visualId) {
// EGL has suggested a visual id, so get the rest of the visual info for that id:
XVisualInfo visualInfoTemplate;
memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));
visualInfoTemplate.visualid = visualId;
XVisualInfo *chosenVisualInfo;
int matchingCount = 0;
chosenVisualInfo = XGetVisualInfo(X11->display, VisualIDMask, &visualInfoTemplate, &matchingCount);
if (chosenVisualInfo) {
if (configBitDepth == chosenVisualInfo->depth) {
#if !defined(QT_NO_XRENDER)
// If we have XRender, actually check the visual supplied by EGL is ARGB
if (configAlphaSize > 0) {
XRenderPictFormat *format;
format = XRenderFindVisualFormat(X11->display, chosenVisualInfo->visual);
if (!format || (format->type != PictTypeDirect) || (!format->direct.alphaMask)) {
qWarning("Warning: EGL suggested using X visual ID %d for config %d, but this is not ARGB",
(int)visualId, (int)config);
visualId = 0;
}
}
#endif
} else {
qWarning("Warning: EGL suggested using X visual ID %d (%d bpp) for config %d (%d bpp), but the depths do not match!",
(int)visualId, chosenVisualInfo->depth, (int)config, configBitDepth);
visualId = 0;
}
}
XFree(chosenVisualInfo);
}
if (visualId) {
#ifdef QT_DEBUG_X11_VISUAL_SELECTION
if (configHasAlpha)
qDebug("Using ARGB Visual ID %d provided by EGL for config %d", (int)visualId, (int)config);
else
qDebug("Using Opaque Visual ID %d provided by EGL for config %d", (int)visualId, (int)config);
#endif
return visualId;
}
// If EGL didn't give us a valid visual ID, try XRender
#if !defined(QT_NO_XRENDER)
if (!visualId) {
XVisualInfo visualInfoTemplate;
memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));
visualInfoTemplate.depth = configBitDepth;
visualInfoTemplate.c_class = TrueColor;
XVisualInfo *matchingVisuals;
int matchingCount = 0;
matchingVisuals = XGetVisualInfo(X11->display,
VisualDepthMask|VisualClassMask,
&visualInfoTemplate,
&matchingCount);
for (int i = 0; i < matchingCount; ++i) {
XRenderPictFormat *format;
format = XRenderFindVisualFormat(X11->display, matchingVisuals[i].visual);
// Check the format for the visual matches the EGL config
if ( (countBits(format->direct.redMask) == configRedSize) &&
(countBits(format->direct.greenMask) == configGreenSize) &&
(countBits(format->direct.blueMask) == configBlueSize) &&
(countBits(format->direct.alphaMask) == configAlphaSize) )
{
visualId = matchingVisuals[i].visualid;
break;
}
}
if (matchingVisuals)
XFree(matchingVisuals);
}
if (visualId) {
# ifdef QT_DEBUG_X11_VISUAL_SELECTION
if (configHasAlpha)
qDebug("Using ARGB Visual ID %d provided by XRender for EGL config %d", (int)visualId, (int)config);
else
qDebug("Using Opaque Visual ID %d provided by XRender for EGL config %d", (int)visualId, (int)config);
# endif // QT_DEBUG_X11_VISUAL_SELECTION
return visualId;
}
#endif //!defined(QT_NO_XRENDER)
// Finally, if XRender also failed to find a visual (or isn't present), try to
// use XGetVisualInfo and only use the bit depth to match on:
if (!visualId) {
XVisualInfo visualInfoTemplate;
memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));
visualInfoTemplate.depth = configBitDepth;
XVisualInfo *matchingVisuals;
int matchingCount = 0;
matchingVisuals = XGetVisualInfo(X11->display,
VisualDepthMask,
&visualInfoTemplate,
&matchingCount);
if (matchingVisuals) {
visualId = matchingVisuals[0].visualid;
XFree(matchingVisuals);
}
}
if (visualId) {
#ifdef QT_DEBUG_X11_VISUAL_SELECTION
qDebug("Using Visual ID %d provided by XGetVisualInfo for EGL config %d", (int)visualId, (int)config);
#endif
return visualId;
}
qWarning("Unable to find an X11 visual which matches EGL config %d", (int)config);
return (VisualID)0;
}
QT_END_NAMESPACE
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