1 files changed, 151 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsnativeimage.cpp b/src/plugins/platforms/windows/qwindowsnativeimage.cpp
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index 0000000000..2ecf334b39
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+++ b/src/plugins/platforms/windows/qwindowsnativeimage.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (info@qt.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 "qwindowsnativeimage.h"
+#include "qwindowscontext.h"
+
+#include <QtGui/private/qpaintengine_p.h>
+#include <QtGui/private/qpaintengine_raster_p.h>
+
+QT_BEGIN_NAMESPACE
+
+typedef struct {
+    BITMAPINFOHEADER bmiHeader;
+    DWORD redMask;
+    DWORD greenMask;
+    DWORD blueMask;
+} BITMAPINFO_MASK;
+
+/*!
+    \class QWindowsNativeImage
+    \brief Windows Native image
+
+    Note that size can be 0 (widget autotests with zero size), which
+    causes CreateDIBSection() to fail.
+
+    \sa QWindowsBackingStore
+    \ingroup qt-lighthouse-win
+*/
+
+static inline HDC createDC()
+{
+    HDC display_dc = GetDC(0);
+    HDC hdc = CreateCompatibleDC(display_dc);
+    ReleaseDC(0, display_dc);
+    Q_ASSERT(hdc);
+    return hdc;
+}
+
+static inline HBITMAP createDIB(HDC hdc, int width, int height,
+                                QImage::Format format,
+                                uchar **bitsIn)
+{
+    BITMAPINFO_MASK bmi;
+    memset(&bmi, 0, sizeof(bmi));
+    bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
+    bmi.bmiHeader.biWidth       = width;
+    bmi.bmiHeader.biHeight      = -height; // top-down.
+    bmi.bmiHeader.biPlanes      = 1;
+    bmi.bmiHeader.biSizeImage   = 0;
+
+    if (format == QImage::Format_RGB16) {
+        bmi.bmiHeader.biBitCount = 16;
+        bmi.bmiHeader.biCompression = BI_BITFIELDS;
+        bmi.redMask = 0xF800;
+        bmi.greenMask = 0x07E0;
+        bmi.blueMask = 0x001F;
+    } else {
+        bmi.bmiHeader.biBitCount    = 32;
+        bmi.bmiHeader.biCompression = BI_RGB;
+        bmi.redMask = 0;
+        bmi.greenMask = 0;
+        bmi.blueMask = 0;
+    }
+
+    void *bits = 0;
+    HBITMAP bitmap = CreateDIBSection(hdc, reinterpret_cast<BITMAPINFO *>(&bmi),
+                                      DIB_RGB_COLORS, &bits, 0, 0);
+    if (!bitmap || !bits)
+        qFatal("%s: CreateDIBSection failed.", __FUNCTION__);
+
+    *bitsIn = (uchar*)bits;
+    return bitmap;
+}
+
+QWindowsNativeImage::QWindowsNativeImage(int width, int height,
+                                         QImage::Format format) :
+    m_hdc(createDC()),
+    m_bitmap(0),
+    m_null_bitmap(0)
+{
+    if (width != 0 && height != 0) {
+        uchar *bits;
+        m_bitmap = createDIB(m_hdc, width, height, format, &bits);
+        m_null_bitmap = (HBITMAP)SelectObject(m_hdc, m_bitmap);
+        m_image = QImage(bits, width, height, format);
+        Q_ASSERT(m_image.paintEngine()->type() == QPaintEngine::Raster);
+        static_cast<QRasterPaintEngine *>(m_image.paintEngine())->setDC(m_hdc);
+    } else {
+        m_image = QImage(width, height, format);
+    }
+
+    GdiFlush();
+}
+
+QWindowsNativeImage::~QWindowsNativeImage()
+{
+    if (m_hdc) {
+        if (m_bitmap) {
+            if (m_null_bitmap)
+                SelectObject(m_hdc, m_null_bitmap);
+            DeleteObject(m_bitmap);
+        }
+        DeleteDC(m_hdc);
+    }
+}
+
+QImage::Format QWindowsNativeImage::systemFormat()
+{
+    static const int depth = QWindowsContext::instance()->screenDepth();
+    return depth == 16 ? QImage::Format_RGB16 : QImage::Format_RGB32;
+}
+
+QT_END_NAMESPACE