Long live Qt!

1 files changed, 481 insertions, 0 deletions

diff --git a/src/gui/image/qpixmap_win.cpp b/src/gui/image/qpixmap_win.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qpixmap.h"
+#include "qpixmap_raster_p.h"
+
+#include "qbitmap.h"
+#include "qimage.h"
+#include "qwidget.h"
+#include "qpainter.h"
+#include "qdatastream.h"
+#include "qbuffer.h"
+#include "qapplication.h"
+#include "qevent.h"
+#include "qfile.h"
+#include "qfileinfo.h"
+#include "qdatetime.h"
+#include "qpixmapcache.h"
+#include "qimagereader.h"
+#include "qimagewriter.h"
+#include "qdebug.h"
+#include "qt_windows.h"
+
+#if defined(Q_OS_WINCE)
+#include <winbase.h>
+#include "qguifunctions_wince.h"
+extern bool qt_wince_is_high_dpi();
+extern bool qt_wince_is_pocket_pc();
+#endif
+
+#ifndef CAPTUREBLT
+#define CAPTUREBLT ((DWORD)0x40000000)
+#endif
+
+QT_BEGIN_NAMESPACE
+
+QPixmap QPixmap::grabWindow(WId winId, int x, int y, int w, int h )
+{
+    RECT r;
+    GetClientRect(winId, &r);
+
+    if (w < 0) w = r.right - r.left;
+    if (h < 0) h = r.bottom - r.top;
+
+#ifdef Q_OS_WINCE_WM
+    if (qt_wince_is_pocket_pc()) {
+        QWidget *widget = QWidget::find(winId);
+        if (qobject_cast<QDesktopWidget *>(widget)) {
+            RECT rect = {0,0,0,0};
+            AdjustWindowRectEx(&rect, WS_BORDER | WS_CAPTION, FALSE, 0);
+            int magicNumber = qt_wince_is_high_dpi() ? 4 : 2;
+            y += rect.top - magicNumber;
+        }
+    }
+#endif
+
+    // Create and setup bitmap
+    HDC display_dc = GetDC(0);
+    HDC bitmap_dc = CreateCompatibleDC(display_dc);
+    HBITMAP bitmap = CreateCompatibleBitmap(display_dc, w, h);
+    HGDIOBJ null_bitmap = SelectObject(bitmap_dc, bitmap);
+
+    // copy data
+    HDC window_dc = GetDC(winId);
+    BitBlt(bitmap_dc, 0, 0, w, h, window_dc, x, y, SRCCOPY
+#ifndef Q_OS_WINCE
+                                    | CAPTUREBLT
+#endif
+            );
+
+    // clean up all but bitmap
+    ReleaseDC(winId, window_dc);
+    SelectObject(bitmap_dc, null_bitmap);
+    DeleteDC(bitmap_dc);
+
+    QPixmap pixmap = QPixmap::fromWinHBITMAP(bitmap);
+
+    DeleteObject(bitmap);
+    ReleaseDC(0, display_dc);
+
+    return pixmap;
+}
+
+
+
+/*!
+    \enum QPixmap::HBitmapFormat
+
+    This enum defines how the conversion between \c HBITMAP
+    and QPixmap is performed.
+
+    \warning This enum is only available on Windows.
+
+    \value NoAlpha The alpha channel is ignored and always treated as
+    being set to fully opaque. This is preferred if the \c HBITMAP is
+    used with standard GDI calls, such as \c BitBlt().
+
+    \value PremultipliedAlpha The \c HBITMAP is treated as having an
+    alpha channel and premultiplied colors. This is preferred if the
+    \c HBITMAP is accessed through the \c AlphaBlend() GDI function.
+
+    \value Alpha The \c HBITMAP is treated as having a plain alpha
+    channel. This is the preferred format if the \c HBITMAP is going
+    to be used as an application icon or systray icon.
+
+    \sa fromWinHBITMAP(), toWinHBITMAP()
+*/
+
+/*!
+    Creates a \c HBITMAP equivalent to the QPixmap, based on the given
+    \a format. Returns the \c HBITMAP handle.
+
+    It is the caller's responsibility to free the \c HBITMAP data
+    after use.
+
+    \warning This function is only available on Windows.
+
+    \sa fromWinHBITMAP()
+*/
+HBITMAP QPixmap::toWinHBITMAP(HBitmapFormat format) const
+{
+    HBITMAP bitmap = 0;
+    if (data->classId() == QPixmapData::RasterClass) {
+        QRasterPixmapData* d = static_cast<QRasterPixmapData*>(data);
+        int w = d->image.width();
+        int h = d->image.height();
+
+        HDC display_dc = GetDC(0);
+
+        // Define the header
+        BITMAPINFO bmi;
+        memset(&bmi, 0, sizeof(bmi));
+        bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
+        bmi.bmiHeader.biWidth       = w;
+        bmi.bmiHeader.biHeight      = -h;
+        bmi.bmiHeader.biPlanes      = 1;
+        bmi.bmiHeader.biBitCount    = 32;
+        bmi.bmiHeader.biCompression = BI_RGB;
+        bmi.bmiHeader.biSizeImage   = w * h * 4;
+
+        // Create the pixmap
+        uchar *pixels = 0;
+        bitmap = CreateDIBSection(display_dc, &bmi, DIB_RGB_COLORS, (void **) &pixels, 0, 0);
+        ReleaseDC(0, display_dc);
+        if (!bitmap) {
+            qErrnoWarning("QPixmap::toWinHBITMAP(), failed to create dibsection");
+            return 0;
+        }
+        if (!pixels) {
+            qErrnoWarning("QPixmap::toWinHBITMAP(), did not allocate pixel data");
+            return 0;
+        }
+
+        // Copy over the data
+        QImage::Format imageFormat = QImage::Format_ARGB32;
+        if (format == NoAlpha)
+            imageFormat = QImage::Format_RGB32;
+        else if (format == PremultipliedAlpha)
+            imageFormat = QImage::Format_ARGB32_Premultiplied;
+        const QImage image = d->image.convertToFormat(imageFormat);
+        int bytes_per_line = w * 4;
+        for (int y=0; y<h; ++y)
+            memcpy(pixels + y * bytes_per_line, image.scanLine(y), bytes_per_line);
+
+    } else {
+        QPixmapData *data = new QRasterPixmapData(depth() == 1 ?
+                                                  QPixmapData::BitmapType : QPixmapData::PixmapType);
+        data->fromImage(toImage(), Qt::AutoColor);
+        return QPixmap(data).toWinHBITMAP(format);
+    }
+    return bitmap;
+}
+
+/*!
+    Returns a QPixmap that is equivalent to the given \a bitmap. The
+    conversion is based on the specified \a format.
+
+    \warning This function is only available on Windows.
+
+    \sa toWinHBITMAP(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
+
+*/
+QPixmap QPixmap::fromWinHBITMAP(HBITMAP bitmap, HBitmapFormat format)
+{
+    // Verify size
+    BITMAP bitmap_info;
+    memset(&bitmap_info, 0, sizeof(BITMAP));
+
+    int res;
+    QT_WA({
+            res = GetObjectW(bitmap, sizeof(BITMAP), &bitmap_info);
+        } , {
+              res = GetObjectA(bitmap, sizeof(BITMAP), &bitmap_info);
+          });
+
+    if (!res) {
+        qErrnoWarning("QPixmap::fromWinHBITMAP(), failed to get bitmap info");
+        return QPixmap();
+    }
+    int w = bitmap_info.bmWidth;
+    int h = bitmap_info.bmHeight;
+
+    BITMAPINFO bmi;
+    memset(&bmi, 0, sizeof(bmi));
+    bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
+    bmi.bmiHeader.biWidth       = w;
+    bmi.bmiHeader.biHeight      = -h;
+    bmi.bmiHeader.biPlanes      = 1;
+    bmi.bmiHeader.biBitCount    = 32;
+    bmi.bmiHeader.biCompression = BI_RGB;
+    bmi.bmiHeader.biSizeImage   = w * h * 4;
+
+    QImage result;
+    // Get bitmap bits
+    uchar *data = (uchar *) qMalloc(bmi.bmiHeader.biSizeImage);
+
+    HDC display_dc = GetDC(0);
+    if (GetDIBits(display_dc, bitmap, 0, h, data, &bmi, DIB_RGB_COLORS)) {
+
+        QImage::Format imageFormat = QImage::Format_ARGB32_Premultiplied;
+        uint mask = 0;
+        if (format == NoAlpha) {
+            imageFormat = QImage::Format_RGB32;
+            mask = 0xff000000;
+        }
+
+        // Create image and copy data into image.
+        QImage image(w, h, imageFormat);
+        if (!image.isNull()) { // failed to alloc?
+            int bytes_per_line = w * sizeof(QRgb);
+            for (int y=0; y<h; ++y) {
+                QRgb *dest = (QRgb *) image.scanLine(y);
+                const QRgb *src = (const QRgb *) (data + y * bytes_per_line);
+                for (int x=0; x<w; ++x) {
+                    const uint pixel = src[x];
+                    if ((pixel & 0xff000000) == 0 && (pixel & 0x00ffffff) != 0)
+                        dest[x] = pixel | 0xff000000;
+                    else
+                        dest[x] = pixel | mask;
+                }
+            }
+        }
+        result = image;
+    } else {
+        qWarning("QPixmap::fromWinHBITMAP(), failed to get bitmap bits");
+    }
+    ReleaseDC(0, display_dc);
+    qFree(data);
+    return fromImage(result);
+}
+
+#ifdef Q_WS_WIN
+#ifndef Q_OS_WINCE
+
+static QImage qt_fromWinHBITMAP(HDC hdc, HBITMAP bitmap, int w, int h)
+{
+    BITMAPINFO bmi;
+    memset(&bmi, 0, sizeof(bmi));
+    bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
+    bmi.bmiHeader.biWidth       = w;
+    bmi.bmiHeader.biHeight      = -h;
+    bmi.bmiHeader.biPlanes      = 1;
+    bmi.bmiHeader.biBitCount    = 32;
+    bmi.bmiHeader.biCompression = BI_RGB;
+    bmi.bmiHeader.biSizeImage   = w * h * 4;
+
+    QImage image(w, h, QImage::Format_ARGB32_Premultiplied);
+    if (image.isNull())
+        return image;
+
+    // Get bitmap bits
+    uchar *data = (uchar *) qMalloc(bmi.bmiHeader.biSizeImage);
+
+    if (GetDIBits(hdc, bitmap, 0, h, data, &bmi, DIB_RGB_COLORS)) {
+        // Create image and copy data into image.
+        for (int y=0; y<h; ++y) {
+            void *dest = (void *) image.scanLine(y);
+            void *src = data + y * image.bytesPerLine();
+            memcpy(dest, src, image.bytesPerLine());
+        }
+    } else {
+        qWarning("qt_fromWinHBITMAP(), failed to get bitmap bits");
+    }
+
+    return image;
+}
+
+QPixmap convertHIconToPixmap( const HICON icon)
+{
+    bool foundAlpha = false;
+    HDC screenDevice = GetDC(0);
+    HDC hdc = CreateCompatibleDC(screenDevice);
+    ReleaseDC(0, screenDevice);
+
+    ICONINFO iconinfo;
+    bool result = GetIconInfo(icon, &iconinfo); //x and y Hotspot describes the icon center
+    if (!result)
+        qWarning("convertHIconToPixmap(), failed to GetIconInfo()");
+
+    int w = iconinfo.xHotspot * 2;
+    int h = iconinfo.yHotspot * 2;
+
+    BITMAPINFOHEADER bitmapInfo;
+    bitmapInfo.biSize        = sizeof(BITMAPINFOHEADER);
+    bitmapInfo.biWidth       = w;
+    bitmapInfo.biHeight      = h;
+    bitmapInfo.biPlanes      = 1;
+    bitmapInfo.biBitCount    = 32;
+    bitmapInfo.biCompression = BI_RGB;
+    bitmapInfo.biSizeImage   = 0;
+    bitmapInfo.biXPelsPerMeter = 0;
+    bitmapInfo.biYPelsPerMeter = 0;
+    bitmapInfo.biClrUsed       = 0;
+    bitmapInfo.biClrImportant  = 0;
+    DWORD* bits;
+
+    HBITMAP winBitmap = CreateDIBSection(hdc, (BITMAPINFO*)&bitmapInfo, DIB_RGB_COLORS, (VOID**)&bits, NULL, 0);
+    HGDIOBJ oldhdc = (HBITMAP)SelectObject(hdc, winBitmap);
+    DrawIconEx( hdc, 0, 0, icon, iconinfo.xHotspot * 2, iconinfo.yHotspot * 2, 0, 0, DI_NORMAL);
+    QImage image = qt_fromWinHBITMAP(hdc, winBitmap, w, h);
+
+    for (int y = 0 ; y < h && !foundAlpha ; y++) {
+        QRgb *scanLine= reinterpret_cast<QRgb *>(image.scanLine(y));
+        for (int x = 0; x < w ; x++) {
+            if (qAlpha(scanLine[x]) != 0) {
+                foundAlpha = true;
+                break;
+            }
+        }
+    }
+    if (!foundAlpha) {
+        //If no alpha was found, we use the mask to set alpha values
+        DrawIconEx( hdc, 0, 0, icon, w, h, 0, 0, DI_MASK);
+        QImage mask = qt_fromWinHBITMAP(hdc, winBitmap, w, h);
+
+        for (int y = 0 ; y < h ; y++){
+            QRgb *scanlineImage = reinterpret_cast<QRgb *>(image.scanLine(y));
+            QRgb *scanlineMask = mask.isNull() ? 0 : reinterpret_cast<QRgb *>(mask.scanLine(y));
+            for (int x = 0; x < w ; x++){
+                if (scanlineMask && qRed(scanlineMask[x]) != 0)
+                    scanlineImage[x] = 0; //mask out this pixel
+                else
+                    scanlineImage[x] |= 0xff000000; // set the alpha channel to 255
+            }
+        }
+    }
+    //dispose resources created by iconinfo call
+    DeleteObject(iconinfo.hbmMask);
+    DeleteObject(iconinfo.hbmColor);
+
+    SelectObject(hdc, oldhdc); //restore state
+    DeleteObject(winBitmap);
+    DeleteDC(hdc);
+    return QPixmap::fromImage(image);
+}
+#else //ifndef Q_OS_WINCE
+QPixmap convertHIconToPixmap( const HICON icon, bool large)
+{
+    HDC screenDevice = GetDC(0);
+    HDC hdc = CreateCompatibleDC(screenDevice);
+    ReleaseDC(0, screenDevice);
+
+    int size = large ? 64 : 32;
+
+    BITMAPINFO bmi;
+    memset(&bmi, 0, sizeof(bmi));
+    bmi.bmiHeader.biSize        = sizeof(BITMAPINFO);
+    bmi.bmiHeader.biWidth       = size;
+    bmi.bmiHeader.biHeight      = -size;
+    bmi.bmiHeader.biPlanes      = 1;
+    bmi.bmiHeader.biBitCount    = 32;
+    bmi.bmiHeader.biCompression = BI_RGB;
+    bmi.bmiHeader.biSizeImage   = size*size*4;
+
+    uchar* bits;
+
+    HBITMAP winBitmap = CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, (void**) &bits, 0, 0);
+    if (winBitmap )
+        memset(bits, 0xff, size*size*4);
+    if (!winBitmap) {
+        qWarning("convertHIconToPixmap(), failed to CreateDIBSection()");
+        return QPixmap();
+    }
+
+    HGDIOBJ oldhdc = (HBITMAP)SelectObject(hdc, winBitmap);
+    if (!DrawIconEx( hdc, 0, 0, icon, size, size, 0, 0, DI_NORMAL))
+        qWarning("convertHIconToPixmap(), failed to DrawIcon()");
+
+    uint mask = 0xff000000;
+    // Create image and copy data into image.
+    QImage image(size, size, QImage::Format_ARGB32);
+
+    if (!image.isNull()) { // failed to alloc?
+        int bytes_per_line = size * sizeof(QRgb);
+        for (int y=0; y<size; ++y) {
+            QRgb *dest = (QRgb *) image.scanLine(y);
+            const QRgb *src = (const QRgb *) (bits + y * bytes_per_line);
+            for (int x=0; x<size; ++x) {
+                dest[x] = src[x];
+            }
+        }
+    }
+    if (!DrawIconEx( hdc, 0, 0, icon, size, size, 0, 0, DI_MASK))
+        qWarning("convertHIconToPixmap(), failed to DrawIcon()");
+    if (!image.isNull()) { // failed to alloc?
+        int bytes_per_line = size * sizeof(QRgb);
+        for (int y=0; y<size; ++y) {
+            QRgb *dest = (QRgb *) image.scanLine(y);
+            const QRgb *src = (const QRgb *) (bits + y * bytes_per_line);
+            for (int x=0; x<size; ++x) {
+                if (!src[x])
+                    dest[x] = dest[x] | mask;
+            }
+        }
+    }
+    SelectObject(hdc, oldhdc); //restore state
+    DeleteObject(winBitmap);
+    DeleteDC(hdc);
+    return QPixmap::fromImage(image);
+}
+#endif //ifndef Q_OS_WINCE
+
+QPixmap loadIconFromShell32( int resourceId, int size )
+{
+#ifdef Q_OS_WINCE
+    HMODULE hmod = LoadLibrary((const wchar_t *) QString::fromLatin1("ceshell.dll").utf16());
+#else
+    HMODULE hmod = LoadLibraryA("shell32.dll");
+#endif
+    if( hmod ) {
+        HICON iconHandle = (HICON)LoadImage(hmod, MAKEINTRESOURCE(resourceId), IMAGE_ICON, size, size, 0);
+        if( iconHandle ) {
+            QPixmap iconpixmap = convertHIconToPixmap( iconHandle );
+            DestroyIcon(iconHandle);
+            return iconpixmap;
+        }
+    }
+    return QPixmap();
+}
+
+#endif
+
+QT_END_NAMESPACE