Move wayland into a client directory not under the plugins src folder

And make wayland common files into a library, exporting all classes. Now
there is no need to do bulild hacks to make your own version of the
wayland plugin.

Change-Id: Ib4872863dfb5ab3f2bc0f4a94ae16fc1e7b63b88
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

1 files changed, 322 insertions, 0 deletions

diff --git a/src/client/qwaylandshmbackingstore.cpp b/src/client/qwaylandshmbackingstore.cpp
new file mode 100644
index 000000000..00a4b13a2
--- /dev/null
+++ b/src/client/qwaylandshmbackingstore.cpp
@@ -0,0 +1,322 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qwaylandshmbackingstore.h"
+
+#include <QtCore/qdebug.h>
+
+#include "qwaylanddisplay.h"
+#include "qwaylandshmwindow.h"
+#include "qwaylandscreen.h"
+#include "qwaylanddecoration.h"
+
+#include <QtGui/QPainter>
+
+#include <wayland-client.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/mman.h>
+
+QT_BEGIN_NAMESPACE
+
+QWaylandShmBuffer::QWaylandShmBuffer(QWaylandDisplay *display,
+                     const QSize &size, QImage::Format format)
+    : mMarginsImage(0)
+{
+    int stride = size.width() * 4;
+    int alloc = stride * size.height();
+    char filename[] = "/tmp/wayland-shm-XXXXXX";
+    int fd = mkstemp(filename);
+    if (fd < 0) {
+        qWarning("mkstemp %s failed: %s", filename, strerror(errno));
+        return;
+    }
+    int flags = fcntl(fd, F_GETFD);
+    if (flags != -1)
+        fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
+
+    if (ftruncate(fd, alloc) < 0) {
+        qWarning("ftruncate failed: %s", strerror(errno));
+        close(fd);
+        return;
+    }
+    uchar *data = (uchar *)
+            mmap(NULL, alloc, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+    unlink(filename);
+
+    if (data == (uchar *) MAP_FAILED) {
+        qWarning("mmap /dev/zero failed: %s", strerror(errno));
+        close(fd);
+        return;
+    }
+
+    mImage = QImage(data, size.width(), size.height(), stride, format);
+    mShmPool = wl_shm_create_pool(display->shm(), fd, alloc);
+    mBuffer = wl_shm_pool_create_buffer(mShmPool,0, size.width(), size.height(),
+                                       stride, WL_SHM_FORMAT_ARGB8888);
+    close(fd);
+}
+
+QWaylandShmBuffer::~QWaylandShmBuffer(void)
+{
+    delete mMarginsImage;
+    munmap((void *) mImage.constBits(), mImage.byteCount());
+    wl_buffer_destroy(mBuffer);
+    wl_shm_pool_destroy(mShmPool);
+}
+
+QImage *QWaylandShmBuffer::imageInsideMargins(const QMargins &margins)
+{
+    if (!margins.isNull() && margins != mMargins) {
+        if (mMarginsImage) {
+            delete mMarginsImage;
+        }
+        uchar *bits = const_cast<uchar *>(mImage.constBits());
+        uchar *b_s_data = bits + margins.top() * mImage.bytesPerLine() + margins.left() * 4;
+        int b_s_width = mImage.size().width() - margins.left() - margins.right();
+        int b_s_height = mImage.size().height() - margins.top() - margins.bottom();
+        mMarginsImage = new QImage(b_s_data, b_s_width,b_s_height,mImage.bytesPerLine(),mImage.format());
+    }
+    if (margins.isNull()) {
+        delete mMarginsImage;
+        mMarginsImage = 0;
+    }
+
+    mMargins = margins;
+    if (!mMarginsImage)
+        return &mImage;
+
+    return mMarginsImage;
+
+}
+
+QWaylandShmBackingStore::QWaylandShmBackingStore(QWindow *window)
+    : QPlatformBackingStore(window)
+    , mDisplay(QWaylandScreen::waylandScreenFromWindow(window)->display())
+    , mFrontBuffer(0)
+    , mBackBuffer(0)
+    , mFrontBufferIsDirty(false)
+    , mPainting(false)
+    , mFrameCallback(0)
+{
+
+}
+
+QWaylandShmBackingStore::~QWaylandShmBackingStore()
+{
+    if (mFrameCallback)
+        wl_callback_destroy(mFrameCallback);
+
+//    if (mFrontBuffer == waylandWindow()->attached())
+//        waylandWindow()->attach(0);
+
+    if (mFrontBuffer != mBackBuffer)
+        delete mFrontBuffer;
+
+    delete mBackBuffer;
+}
+
+QPaintDevice *QWaylandShmBackingStore::paintDevice()
+{
+    if (!windowDecoration())
+        return mBackBuffer->image();
+    return mBackBuffer->imageInsideMargins(windowDecorationMargins());
+}
+
+void QWaylandShmBackingStore::beginPaint(const QRegion &)
+{
+    mPainting = true;
+    ensureSize();
+
+    if (waylandWindow()->attached() && mBackBuffer == waylandWindow()->attached() && mFrameCallback) {
+        QWaylandShmWindow *waylandWindow = static_cast<QWaylandShmWindow *>(window()->handle());
+        Q_ASSERT(waylandWindow->windowType() == QWaylandWindow::Shm);
+        waylandWindow->waitForFrameSync();
+    }
+
+    waylandWindow()->setCanResize(false);
+}
+
+void QWaylandShmBackingStore::endPaint()
+{
+    mPainting = false;
+    waylandWindow()->setCanResize(true);
+}
+
+void QWaylandShmBackingStore::ensureSize()
+{
+    waylandWindow()->setBackingStore(this);
+    waylandWindow()->createDecoration();
+    resize(mRequestedSize);
+}
+
+void QWaylandShmBackingStore::flush(QWindow *window, const QRegion &region, const QPoint &offset)
+{
+    Q_UNUSED(window);
+    Q_UNUSED(offset);
+    Q_ASSERT(waylandWindow()->windowType() == QWaylandWindow::Shm);
+
+    if (windowDecoration() && windowDecoration()->isDirty())
+        updateDecorations();
+
+    mFrontBuffer = mBackBuffer;
+
+    if (mFrameCallback) {
+        mFrontBufferIsDirty = true;
+        return;
+    }
+
+    mFrameCallback = waylandWindow()->frame();
+    wl_callback_add_listener(mFrameCallback,&frameCallbackListener,this);
+    QMargins margins = windowDecorationMargins();
+
+    bool damageAll = false;
+    if (waylandWindow()->attached() != mFrontBuffer) {
+        delete waylandWindow()->attached();
+        damageAll = true;
+    }
+    waylandWindow()->attachOffset(mFrontBuffer);
+
+    if (damageAll) {
+        //need to damage it all, otherwise the attach offset may screw up
+        waylandWindow()->damage(QRect(QPoint(0,0),mFrontBuffer->size()));
+    } else {
+        QVector<QRect> rects = region.rects();
+        for (int i = 0; i < rects.size(); i++) {
+            QRect rect = rects.at(i);
+            rect.translate(margins.left(),margins.top());
+            waylandWindow()->damage(rect);
+        }
+    }
+    waylandWindow()->commit();
+    mFrontBufferIsDirty = false;
+}
+
+void QWaylandShmBackingStore::resize(const QSize &size, const QRegion &)
+{
+    mRequestedSize = size;
+}
+
+void QWaylandShmBackingStore::resize(const QSize &size)
+{
+    QMargins margins = windowDecorationMargins();
+    QSize sizeWithMargins = size + QSize(margins.left()+margins.right(),margins.top()+margins.bottom());
+
+    QImage::Format format = QPlatformScreen::platformScreenForWindow(window())->format();
+
+    if (mBackBuffer != NULL && mBackBuffer->size() == sizeWithMargins)
+        return;
+
+    if (mBackBuffer != mFrontBuffer) {
+        delete mBackBuffer; //we delete the attached buffer when we flush
+    }
+
+    mBackBuffer = new QWaylandShmBuffer(mDisplay, sizeWithMargins, format);
+
+    if (windowDecoration() && window()->isVisible())
+        windowDecoration()->update();
+}
+
+QImage *QWaylandShmBackingStore::entireSurface() const
+{
+    return mBackBuffer->image();
+}
+
+void QWaylandShmBackingStore::updateDecorations()
+{
+    QPainter decorationPainter(entireSurface());
+    decorationPainter.setCompositionMode(QPainter::CompositionMode_Source);
+    QImage sourceImage = windowDecoration()->contentImage();
+    QRect target;
+    //Top
+    target.setX(0);
+    target.setY(0);
+    target.setWidth(sourceImage.width());
+    target.setHeight(windowDecorationMargins().top());
+    decorationPainter.drawImage(target, sourceImage, target);
+
+    //Left
+    target.setWidth(windowDecorationMargins().left());
+    target.setHeight(sourceImage.height());
+    decorationPainter.drawImage(target, sourceImage, target);
+
+    //Right
+    target.setX(sourceImage.width() - windowDecorationMargins().right());
+    decorationPainter.drawImage(target, sourceImage, target);
+
+    //Bottom
+    target.setX(0);
+    target.setY(sourceImage.height() - windowDecorationMargins().bottom());
+    target.setWidth(sourceImage.width());
+    target.setHeight(windowDecorationMargins().bottom());
+    decorationPainter.drawImage(target, sourceImage, target);
+}
+
+void QWaylandShmBackingStore::done(void *data, wl_callback *callback, uint32_t time)
+{
+    Q_UNUSED(time);
+    QWaylandShmBackingStore *self =
+            static_cast<QWaylandShmBackingStore *>(data);
+    if (callback != self->mFrameCallback) // others, like QWaylandWindow, may trigger callbacks too
+        return;
+    QWaylandShmWindow *window = self->waylandWindow();
+    wl_callback_destroy(self->mFrameCallback);
+    self->mFrameCallback = 0;
+
+
+    if (self->mFrontBufferIsDirty && !self->mPainting) {
+        self->mFrontBufferIsDirty = false;
+        self->mFrameCallback = wl_surface_frame(window->object());
+        wl_callback_add_listener(self->mFrameCallback,&self->frameCallbackListener,self);
+        if (self->mFrontBuffer != window->attached()) {
+            delete window->attached();
+        }
+        window->attachOffset(self->mFrontBuffer);
+        window->damage(QRect(QPoint(0,0),self->mFrontBuffer->size()));
+        window->commit();
+    }
+}
+
+const struct wl_callback_listener QWaylandShmBackingStore::frameCallbackListener = {
+    QWaylandShmBackingStore::done
+};
+
+QT_END_NAMESPACE