Integrate the OpenVG graphics system into Qt 4.6

This change also moves the EGL support classes from QtOpenGL to QtGui
so they can be shared between OpenGL and OpenVG.

1 files changed, 144 insertions, 0 deletions

diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp
new file mode 100644
index 0000000..be89efe
--- /dev/null
+++ b/src/gui/egl/qegl_x11.cpp
@@ -0,0 +1,144 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include <QtCore/qdebug.h>
+#include "qegl_p.h"
+
+#include <QtGui/qx11info_x11.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+QT_BEGIN_NAMESPACE
+
+bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
+{
+    // Create the native drawable for the paint device.
+    int devType = device->devType();
+    EGLNativePixmapType pixmapDrawable = 0;
+    EGLNativeWindowType windowDrawable = 0;
+    bool ok;
+    if (devType == QInternal::Pixmap) {
+        pixmapDrawable = (EGLNativePixmapType)(static_cast<QPixmap *>(device))->handle();
+        ok = (pixmapDrawable != 0);
+    } else if (devType == QInternal::Widget) {
+        windowDrawable = (EGLNativeWindowType)(static_cast<QWidget *>(device))->winId();
+        ok = (windowDrawable != 0);
+    } else {
+        ok = false;
+    }
+    if (!ok) {
+        qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");
+        return false;
+    }
+
+    // Create the EGL surface to draw into, based on the native drawable.
+    const int *props;
+    if (properties)
+        props = properties->properties();
+    else
+        props = 0;
+    if (devType == QInternal::Widget)
+        surf = eglCreateWindowSurface(dpy, cfg, windowDrawable, props);
+    else
+        surf = eglCreatePixmapSurface(dpy, cfg, pixmapDrawable, props);
+    if (surf == EGL_NO_SURFACE) {
+        qWarning() << "QEglContext::createSurface(): Unable to create EGL surface:"
+                   << errorString(eglGetError());
+        return false;
+    }
+    return true;
+}
+
+EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
+{
+    Q_UNUSED(device);
+    Display *xdpy = QX11Info::display();
+    if (!xdpy) {
+        qWarning("QEglContext::getDisplay(): X11 display is not open");
+        return EGL_NO_DISPLAY;
+    }
+    return eglGetDisplay(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));
+    setValue(EGL_ALPHA_SIZE, 0);    // XXX
+}
+
+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));
+}
+
+QT_END_NAMESPACE