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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 271 insertions, 0 deletions

diff --git a/src/plugins/platforms/xcb/qdri2context.cpp b/src/plugins/platforms/xcb/qdri2context.cpp
new file mode 100644
index 0000000000..dbbfa67d8f
--- /dev/null
+++ b/src/plugins/platforms/xcb/qdri2context.cpp
@@ -0,0 +1,271 @@
+/****************************************************************************
+**
+** 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 "qdri2context.h"
+
+#include "qxcbwindow.h"
+#include "qxcbconnection.h"
+
+#include <QtCore/QDebug>
+#include <QtGui/QWidget>
+
+#include <xcb/dri2.h>
+#include <xcb/xfixes.h>
+
+#define MESA_EGL_NO_X11_HEADERS
+#define EGL_EGLEXT_PROTOTYPES
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#define GL_GLEXT_PROTOTYPES
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+class QDri2ContextPrivate
+{
+public:
+    QDri2ContextPrivate(QXcbWindow *window)
+        : qXcbWindow(window)
+        , windowFormat(window->widget()->platformWindowFormat())
+        , image(0)
+    {
+    }
+
+    xcb_window_t xcbWindow() { return qXcbWindow->window(); }
+    xcb_connection_t *xcbConnection() { return qXcbWindow->xcb_connection(); }
+
+    QXcbWindow *qXcbWindow;
+    QPlatformWindowFormat windowFormat;
+
+    EGLContext eglContext;
+
+    EGLImageKHR image;
+
+    GLuint fbo;
+    GLuint rbo;
+    GLuint depth;
+
+    QSize size;
+};
+
+QDri2Context::QDri2Context(QXcbWindow *window)
+    : d_ptr(new QDri2ContextPrivate(window))
+{
+    Q_D(QDri2Context);
+
+    static const EGLint contextAttribs[] = {
+            EGL_CONTEXT_CLIENT_VERSION, 2,
+            EGL_NONE
+    };
+
+    eglBindAPI(EGL_OPENGL_ES_API);
+
+    EGLContext shareContext = EGL_NO_CONTEXT;
+    if (window->widget()->platformWindowFormat().sharedGLContext()) {
+        QDri2Context *context = static_cast<QDri2Context *>(window->widget()->platformWindowFormat().sharedGLContext());
+        shareContext = context->d_func()->eglContext;
+    }
+    d->eglContext = eglCreateContext(EGL_DISPLAY_FROM_XCB(d->qXcbWindow), NULL,
+                                               shareContext, contextAttribs);
+
+    if (d->eglContext == EGL_NO_CONTEXT) {
+        qDebug() << "No eglContext!" << eglGetError();
+    }
+
+    EGLBoolean makeCurrentSuccess = eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext);
+    if (!makeCurrentSuccess) {
+        qDebug() << "eglMakeCurrent failed!" << eglGetError();
+    }
+
+    xcb_dri2_create_drawable (d->xcbConnection(), d->xcbWindow());
+
+    glGenFramebuffers(1,&d->fbo);
+    glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
+    glActiveTexture(GL_TEXTURE0);
+
+    glGenRenderbuffers(1, &d->rbo);
+    glBindRenderbuffer(GL_RENDERBUFFER, d->rbo);
+
+    glGenRenderbuffers(1,&d->depth);
+    glBindRenderbuffer(GL_RENDERBUFFER, d->depth);
+
+    resize(d->qXcbWindow->widget()->geometry().size());
+
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, d->rbo);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERER,d->depth);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERER,d->depth);
+
+    //restore the old current context
+    const QPlatformGLContext *currentContext = QPlatformGLContext::currentContext();
+    if (currentContext)
+        const_cast<QPlatformGLContext*>(currentContext)->makeCurrent();
+}
+
+QDri2Context::~QDri2Context()
+{
+    //cleanup
+}
+
+void QDri2Context::makeCurrent()
+{
+    QPlatformGLContext::makeCurrent();
+    Q_D(QDri2Context);
+
+    eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext);
+    glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
+
+}
+
+void QDri2Context::doneCurrent()
+{
+    QPlatformGLContext::doneCurrent();
+    Q_D(QDri2Context);
+    eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,EGL_NO_CONTEXT);
+}
+
+void QDri2Context::swapBuffers()
+{
+    Q_D(QDri2Context);
+    xcb_rectangle_t rectangle;
+    rectangle.x = 0;
+    rectangle.y = 0;
+    rectangle.width = d->qXcbWindow->widget()->geometry().width();
+    rectangle.height = d->qXcbWindow->widget()->geometry().height();
+
+    xcb_xfixes_region_t xfixesRegion = xcb_generate_id(d->xcbConnection());
+    xcb_xfixes_create_region(d->xcbConnection(), xfixesRegion,
+                             1, &rectangle);
+
+    xcb_dri2_copy_region_cookie_t cookie = xcb_dri2_copy_region_unchecked(d->xcbConnection(),
+                                                                          d->qXcbWindow->window(),
+                                                                          xfixesRegion,
+                                                                          XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
+                                                                          XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT);
+
+    xcb_dri2_copy_region_reply_t *reply = xcb_dri2_copy_region_reply(d->xcbConnection(),cookie,NULL);
+
+    //cleanup
+    delete reply;
+    xcb_xfixes_destroy_region(d->xcbConnection(), xfixesRegion);
+
+}
+
+void * QDri2Context::getProcAddress(const QString &procName)
+{
+    return (void *)eglGetProcAddress(qPrintable(procName));
+}
+
+void QDri2Context::resize(const QSize &size)
+{
+    Q_D(QDri2Context);
+    d->size= size;
+
+    glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
+
+    xcb_dri2_dri2_buffer_t *backBfr = backBuffer();
+
+    if (d->image) {
+        qDebug() << "destroing image";
+        eglDestroyImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),d->image);
+    }
+
+    EGLint imgAttribs[] = {
+        EGL_WIDTH,                      d->size.width(),
+        EGL_HEIGHT,                     d->size.height(),
+        EGL_DRM_BUFFER_STRIDE_MESA,     backBfr->pitch /4,
+        EGL_DRM_BUFFER_FORMAT_MESA,     EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
+        EGL_NONE
+    };
+
+    d->image = eglCreateImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),
+                                EGL_NO_CONTEXT,
+                                EGL_DRM_BUFFER_MESA,
+                                (EGLClientBuffer) backBfr->name,
+                                imgAttribs);
+
+    glBindRenderbuffer(GL_RENDERBUFFER, d->rbo);
+    glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
+                                           d->image);
+
+    glBindRenderbuffer(GL_RENDERBUFFER, d->depth);
+    glRenderbufferStorage(GL_RENDERBUFFER,GL_DEPTH24_STENCIL8_OES,d->size.width(), d->size.height());
+
+}
+
+QPlatformWindowFormat QDri2Context::platformWindowFormat() const
+{
+    Q_D(const QDri2Context);
+    return d->windowFormat;
+}
+
+xcb_dri2_dri2_buffer_t * QDri2Context::backBuffer()
+{
+    Q_D(QDri2Context);
+
+    unsigned int backBufferAttachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
+    xcb_dri2_get_buffers_cookie_t cookie = xcb_dri2_get_buffers_unchecked (d->xcbConnection(),
+                                                                           d->xcbWindow(),
+                                                                           1, 1, &backBufferAttachment);
+
+    xcb_dri2_get_buffers_reply_t *reply = xcb_dri2_get_buffers_reply (d->xcbConnection(), cookie, NULL);
+    if (!reply) {
+        qDebug() << "failed to get buffers reply";
+        return 0;
+    }
+
+    xcb_dri2_dri2_buffer_t *buffers = xcb_dri2_get_buffers_buffers (reply);
+    if (!buffers) {
+        qDebug() << "failed to get buffers";
+        return 0;
+    }
+
+    Q_ASSERT(reply->count == 1);
+
+    delete reply;
+
+    return buffers;
+}
+
+void * QDri2Context::eglContext() const
+{
+    Q_D(const QDri2Context);
+    return d->eglContext;
+}