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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 plugins 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 "qwaylandreadbackeglcontext.h"
#include "../../../eglconvenience/qeglconvenience.h"
#include <QtOpenGL/QGLContext>
#include <QtOpenGL/private/qglextensions_p.h>
#include "qwaylandshmsurface.h"
#include <QtCore/QDebug>
static inline void qgl_byteSwapImage(QImage &img, GLenum pixel_type)
{
const int width = img.width();
const int height = img.height();
if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV
|| (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian))
{
for (int i = 0; i < height; ++i) {
uint *p = (uint *) img.scanLine(i);
for (int x = 0; x < width; ++x)
p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
}
} else {
for (int i = 0; i < height; ++i) {
uint *p = (uint *) img.scanLine(i);
for (int x = 0; x < width; ++x)
p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff);
}
}
}
QWaylandReadbackEglContext::QWaylandReadbackEglContext(QWaylandReadbackEglIntegration *eglIntegration, QWaylandReadbackEglWindow *window)
: mEglIntegration(eglIntegration)
, mWindow(window)
, mBuffer(0)
, mPixmap(0)
, mConfig(q_configFromQPlatformWindowFormat(eglIntegration->eglDisplay(),window->widget()->platformWindowFormat(),true,EGL_PIXMAP_BIT))
, mPixmapSurface(EGL_NO_SURFACE)
{
QVector<EGLint> eglContextAttrs;
eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
eglContextAttrs.append(2);
eglContextAttrs.append(EGL_NONE);
mContext = eglCreateContext(eglIntegration->eglDisplay(),mConfig,0,eglContextAttrs.constData());
geometryChanged();
}
QWaylandReadbackEglContext::~QWaylandReadbackEglContext()
{
eglDestroyContext(mEglIntegration->eglDisplay(),mContext);
}
void QWaylandReadbackEglContext::makeCurrent()
{
QPlatformGLContext::makeCurrent();
mWindow->waitForFrameSync();
eglMakeCurrent(mEglIntegration->eglDisplay(),mPixmapSurface,mPixmapSurface,mContext);
}
void QWaylandReadbackEglContext::doneCurrent()
{
QPlatformGLContext::doneCurrent();
eglMakeCurrent(mEglIntegration->eglDisplay(),EGL_NO_SURFACE,EGL_NO_SURFACE,EGL_NO_CONTEXT);
}
void QWaylandReadbackEglContext::swapBuffers()
{
eglSwapBuffers(mEglIntegration->eglDisplay(),mPixmapSurface);
if (QPlatformGLContext::currentContext() != this) {
makeCurrent();
}
QSize size = mWindow->geometry().size();
QImage img(size,QImage::Format_ARGB32);
const uchar *constBits = img.bits();
void *pixels = const_cast<uchar *>(constBits);
glReadPixels(0,0, size.width(), size.height(), GL_RGBA,GL_UNSIGNED_BYTE, pixels);
img = img.mirrored();
qgl_byteSwapImage(img,GL_UNSIGNED_INT_8_8_8_8_REV);
constBits = img.bits();
const uchar *constDstBits = mBuffer->image()->bits();
uchar *dstBits = const_cast<uchar *>(constDstBits);
memcpy(dstBits,constBits,(img.width()*4) * img.height());
mWindow->damage(QRegion(QRect(QPoint(0,0),size)));
}
void * QWaylandReadbackEglContext::getProcAddress(const QString &procName)
{
return (void *) eglGetProcAddress(procName.toLatin1().data());
}
QPlatformWindowFormat QWaylandReadbackEglContext::platformWindowFormat() const
{
return qt_qPlatformWindowFormatFromConfig(mEglIntegration->eglDisplay(),mConfig);
}
void QWaylandReadbackEglContext::geometryChanged()
{
QSize size(mWindow->geometry().size());
if (size.isEmpty()) {
//QGLWidget wants a context for a window without geometry
size = QSize(1,1);
}
mWindow->waitForFrameSync();
delete mBuffer;
if (mPixmap)
XFreePixmap(mEglIntegration->xDisplay(),mPixmap);
mBuffer = new QWaylandShmBuffer(mEglIntegration->waylandDisplay(),size,QImage::Format_ARGB32);
mWindow->attach(mBuffer);
mPixmap = XCreatePixmap(mEglIntegration->xDisplay(),mEglIntegration->rootWindow(),size.width(),size.height(),mEglIntegration->depth());
XSync(mEglIntegration->xDisplay(),False);
mPixmapSurface = eglCreatePixmapSurface(mEglIntegration->eglDisplay(),mConfig,mPixmap,0);
if (mPixmapSurface == EGL_NO_SURFACE) {
qDebug() << "Could not make egl surface out of pixmap :(";
}
}
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