1 files changed, 134 insertions, 0 deletions
diff --git a/src/plugins/platforms/wayland/gl_integration/readback_glx/qwaylandreadbackglxcontext.cpp b/src/plugins/platforms/wayland/gl_integration/readback_glx/qwaylandreadbackglxcontext.cpp
new file mode 100644
index 0000000..850e7bb
--- /dev/null
+++ b/src/plugins/platforms/wayland/gl_integration/readback_glx/qwaylandreadbackglxcontext.cpp
@@ -0,0 +1,134 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "qwaylandreadbackglxcontext.h"
+
+#include "qwaylandshmbackingstore.h"
+#include "qwaylandreadbackglxwindow.h"
+
+#include <QtGui/QOpenGLContext>
+#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);
+        }
+    }
+}
+
+QWaylandReadbackGlxContext::QWaylandReadbackGlxContext(const QSurfaceFormat &format,
+        QPlatformOpenGLContext *share, Display *display, int screen)
+    : m_display(display)
+{
+    GLXFBConfig config = qglx_findConfig(display, screen, format, GLX_PIXMAP_BIT);
+
+    GLXContext shareContext = share ? static_cast<QWaylandReadbackGlxContext *>(share)->m_context : 0;
+
+    XVisualInfo *visualInfo = glXGetVisualFromFBConfig(display, config);
+    m_context = glXCreateContext(display, visualInfo, shareContext, TRUE);
+    m_format = qglx_surfaceFormatFromGLXFBConfig(display, config, m_context);
+}
+
+QSurfaceFormat QWaylandReadbackGlxContext::format() const
+{
+    return m_format;
+}
+
+bool QWaylandReadbackGlxContext::makeCurrent(QPlatformSurface *surface)
+{
+    GLXPixmap glxPixmap = static_cast<QWaylandReadbackGlxWindow *>(surface)->glxPixmap();
+
+    return glXMakeCurrent(m_display, glxPixmap, m_context);
+}
+
+void QWaylandReadbackGlxContext::doneCurrent()
+{
+    glXMakeCurrent(m_display, 0, 0);
+}
+
+void QWaylandReadbackGlxContext::swapBuffers(QPlatformSurface *surface)
+{
+    // #### makeCurrent() directly on the platform context doesn't update QOpenGLContext::currentContext()
+    if (QOpenGLContext::currentContext()->handle() != this)
+        makeCurrent(surface);
+
+    QWaylandReadbackGlxWindow *w = static_cast<QWaylandReadbackGlxWindow *>(surface);
+
+    QSize size = w->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 = w->buffer();
+    uchar *dstBits = const_cast<uchar *>(constDstBits);
+    memcpy(dstBits, constBits, (img.width() * 4) * img.height());
+
+    w->damage(QRect(QPoint(), size));
+
+    w->waitForFrameSync();
+}
+
+void (*QWaylandReadbackGlxContext::getProcAddress(const QByteArray &procName)) ()
+{
+    return glXGetProcAddress(reinterpret_cast<const GLubyte *>(procName.constData()));
+}