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-rw-r--r--src/gui/image/qbmphandler.cpp837
1 files changed, 837 insertions, 0 deletions
diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp
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+++ b/src/gui/image/qbmphandler.cpp
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+/****************************************************************************
+**
+** 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 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 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 "private/qbmphandler_p.h"
+
+#ifndef QT_NO_IMAGEFORMAT_BMP
+
+#include <qimage.h>
+#include <qvariant.h>
+#include <qvector.h>
+
+QT_BEGIN_NAMESPACE
+
+static void swapPixel01(QImage *image) // 1-bpp: swap 0 and 1 pixels
+{
+ int i;
+ if (image->depth() == 1 && image->colorCount() == 2) {
+ register uint *p = (uint *)image->bits();
+ int nbytes = image->byteCount();
+ for (i=0; i<nbytes/4; i++) {
+ *p = ~*p;
+ p++;
+ }
+ uchar *p2 = (uchar *)p;
+ for (i=0; i<(nbytes&3); i++) {
+ *p2 = ~*p2;
+ p2++;
+ }
+ QRgb t = image->color(0); // swap color 0 and 1
+ image->setColor(0, image->color(1));
+ image->setColor(1, t);
+ }
+}
+
+/*
+ QImageIO::defineIOHandler("BMP", "^BM", 0,
+ read_bmp_image, write_bmp_image);
+*/
+
+/*****************************************************************************
+ BMP (DIB) image read/write functions
+ *****************************************************************************/
+
+const int BMP_FILEHDR_SIZE = 14; // size of BMP_FILEHDR data
+
+static QDataStream &operator>>(QDataStream &s, BMP_FILEHDR &bf)
+{ // read file header
+ s.readRawData(bf.bfType, 2);
+ s >> bf.bfSize >> bf.bfReserved1 >> bf.bfReserved2 >> bf.bfOffBits;
+ return s;
+}
+
+static QDataStream &operator<<(QDataStream &s, const BMP_FILEHDR &bf)
+{ // write file header
+ s.writeRawData(bf.bfType, 2);
+ s << bf.bfSize << bf.bfReserved1 << bf.bfReserved2 << bf.bfOffBits;
+ return s;
+}
+
+
+const int BMP_OLD = 12; // old Windows/OS2 BMP size
+const int BMP_WIN = 40; // new Windows BMP size
+const int BMP_OS2 = 64; // new OS/2 BMP size
+
+const int BMP_RGB = 0; // no compression
+const int BMP_RLE8 = 1; // run-length encoded, 8 bits
+const int BMP_RLE4 = 2; // run-length encoded, 4 bits
+const int BMP_BITFIELDS = 3; // RGB values encoded in data as bit-fields
+
+
+static QDataStream &operator>>(QDataStream &s, BMP_INFOHDR &bi)
+{
+ s >> bi.biSize;
+ if (bi.biSize == BMP_WIN || bi.biSize == BMP_OS2) {
+ s >> bi.biWidth >> bi.biHeight >> bi.biPlanes >> bi.biBitCount;
+ s >> bi.biCompression >> bi.biSizeImage;
+ s >> bi.biXPelsPerMeter >> bi.biYPelsPerMeter;
+ s >> bi.biClrUsed >> bi.biClrImportant;
+ }
+ else { // probably old Windows format
+ qint16 w, h;
+ s >> w >> h >> bi.biPlanes >> bi.biBitCount;
+ bi.biWidth = w;
+ bi.biHeight = h;
+ bi.biCompression = BMP_RGB; // no compression
+ bi.biSizeImage = 0;
+ bi.biXPelsPerMeter = bi.biYPelsPerMeter = 0;
+ bi.biClrUsed = bi.biClrImportant = 0;
+ }
+ return s;
+}
+
+static QDataStream &operator<<(QDataStream &s, const BMP_INFOHDR &bi)
+{
+ s << bi.biSize;
+ s << bi.biWidth << bi.biHeight;
+ s << bi.biPlanes;
+ s << bi.biBitCount;
+ s << bi.biCompression;
+ s << bi.biSizeImage;
+ s << bi.biXPelsPerMeter << bi.biYPelsPerMeter;
+ s << bi.biClrUsed << bi.biClrImportant;
+ return s;
+}
+
+static int calc_shift(int mask)
+{
+ int result = 0;
+ while (mask && !(mask & 1)) {
+ result++;
+ mask >>= 1;
+ }
+ return result;
+}
+
+static bool read_dib_fileheader(QDataStream &s, BMP_FILEHDR &bf)
+{
+ // read BMP file header
+ s >> bf;
+ if (s.status() != QDataStream::Ok)
+ return false;
+
+ // check header
+ if (qstrncmp(bf.bfType,"BM",2) != 0)
+ return false;
+
+ return true;
+}
+
+static bool read_dib_infoheader(QDataStream &s, BMP_INFOHDR &bi)
+{
+ s >> bi; // read BMP info header
+ if (s.status() != QDataStream::Ok)
+ return false;
+
+ int nbits = bi.biBitCount;
+ int comp = bi.biCompression;
+ if (!(nbits == 1 || nbits == 4 || nbits == 8 || nbits == 16 || nbits == 24 || nbits == 32) ||
+ bi.biPlanes != 1 || comp > BMP_BITFIELDS)
+ return false; // weird BMP image
+ if (!(comp == BMP_RGB || (nbits == 4 && comp == BMP_RLE4) ||
+ (nbits == 8 && comp == BMP_RLE8) || ((nbits == 16 || nbits == 32) && comp == BMP_BITFIELDS)))
+ return false; // weird compression type
+
+ return true;
+}
+
+static bool read_dib_body(QDataStream &s, const BMP_INFOHDR &bi, int offset, int startpos, QImage &image)
+{
+ QIODevice* d = s.device();
+ if (d->atEnd()) // end of stream/file
+ return false;
+#if 0
+ qDebug("offset...........%d", offset);
+ qDebug("startpos.........%d", startpos);
+ qDebug("biSize...........%d", bi.biSize);
+ qDebug("biWidth..........%d", bi.biWidth);
+ qDebug("biHeight.........%d", bi.biHeight);
+ qDebug("biPlanes.........%d", bi.biPlanes);
+ qDebug("biBitCount.......%d", bi.biBitCount);
+ qDebug("biCompression....%d", bi.biCompression);
+ qDebug("biSizeImage......%d", bi.biSizeImage);
+ qDebug("biXPelsPerMeter..%d", bi.biXPelsPerMeter);
+ qDebug("biYPelsPerMeter..%d", bi.biYPelsPerMeter);
+ qDebug("biClrUsed........%d", bi.biClrUsed);
+ qDebug("biClrImportant...%d", bi.biClrImportant);
+#endif
+ int w = bi.biWidth, h = bi.biHeight, nbits = bi.biBitCount;
+ int t = bi.biSize, comp = bi.biCompression;
+ int red_mask = 0;
+ int green_mask = 0;
+ int blue_mask = 0;
+ int red_shift = 0;
+ int green_shift = 0;
+ int blue_shift = 0;
+ int red_scale = 0;
+ int green_scale = 0;
+ int blue_scale = 0;
+
+ int ncols = 0;
+ int depth = 0;
+ QImage::Format format;
+ switch (nbits) {
+ case 32:
+ case 24:
+ case 16:
+ depth = 32;
+ format = QImage::Format_RGB32;
+ break;
+ case 8:
+ case 4:
+ depth = 8;
+ format = QImage::Format_Indexed8;
+ break;
+ default:
+ depth = 1;
+ format = QImage::Format_Mono;
+ }
+
+ if (bi.biHeight < 0)
+ h = -h; // support images with negative height
+
+ if (image.size() != QSize(w, h) || image.format() != format) {
+ image = QImage(w, h, format);
+ if (image.isNull()) // could not create image
+ return false;
+ }
+
+ if (depth != 32) {
+ ncols = bi.biClrUsed ? bi.biClrUsed : 1 << nbits;
+ if (ncols > 256) // sanity check - don't run out of mem if color table is broken
+ return false;
+ image.setColorCount(ncols);
+ }
+
+ image.setDotsPerMeterX(bi.biXPelsPerMeter);
+ image.setDotsPerMeterY(bi.biYPelsPerMeter);
+
+ if (!d->isSequential())
+ d->seek(startpos + BMP_FILEHDR_SIZE + bi.biSize); // goto start of colormap
+
+ if (ncols > 0) { // read color table
+ uchar rgb[4];
+ int rgb_len = t == BMP_OLD ? 3 : 4;
+ for (int i=0; i<ncols; i++) {
+ if (d->read((char *)rgb, rgb_len) != rgb_len)
+ return false;
+ image.setColor(i, qRgb(rgb[2],rgb[1],rgb[0]));
+ if (d->atEnd()) // truncated file
+ return false;
+ }
+ } else if (comp == BMP_BITFIELDS && (nbits == 16 || nbits == 32)) {
+ if (d->read((char *)&red_mask, sizeof(red_mask)) != sizeof(red_mask))
+ return false;
+ if (d->read((char *)&green_mask, sizeof(green_mask)) != sizeof(green_mask))
+ return false;
+ if (d->read((char *)&blue_mask, sizeof(blue_mask)) != sizeof(blue_mask))
+ return false;
+ red_shift = calc_shift(red_mask);
+ red_scale = 256 / ((red_mask >> red_shift) + 1);
+ green_shift = calc_shift(green_mask);
+ green_scale = 256 / ((green_mask >> green_shift) + 1);
+ blue_shift = calc_shift(blue_mask);
+ blue_scale = 256 / ((blue_mask >> blue_shift) + 1);
+ } else if (comp == BMP_RGB && (nbits == 24 || nbits == 32)) {
+ blue_mask = 0x000000ff;
+ green_mask = 0x0000ff00;
+ red_mask = 0x00ff0000;
+ blue_shift = 0;
+ green_shift = 8;
+ red_shift = 16;
+ blue_scale = green_scale = red_scale = 1;
+ } else if (comp == BMP_RGB && nbits == 16) {
+ blue_mask = 0x001f;
+ green_mask = 0x03e0;
+ red_mask = 0x7c00;
+ blue_shift = 0;
+ green_shift = 2;
+ red_shift = 7;
+ red_scale = 1;
+ green_scale = 1;
+ blue_scale = 8;
+ }
+
+ // offset can be bogus, be careful
+ if (offset>=0 && startpos + offset > d->pos()) {
+ if (!d->isSequential())
+ d->seek(startpos + offset); // start of image data
+ }
+
+ int bpl = image.bytesPerLine();
+ uchar *data = image.bits();
+
+ if (nbits == 1) { // 1 bit BMP image
+ while (--h >= 0) {
+ if (d->read((char*)(data + h*bpl), bpl) != bpl)
+ break;
+ }
+ if (ncols == 2 && qGray(image.color(0)) < qGray(image.color(1)))
+ swapPixel01(&image); // pixel 0 is white!
+ }
+
+ else if (nbits == 4) { // 4 bit BMP image
+ int buflen = ((w+7)/8)*4;
+ uchar *buf = new uchar[buflen];
+ if (comp == BMP_RLE4) { // run length compression
+ int x=0, y=0, c, i;
+ quint8 b;
+ register uchar *p = data + (h-1)*bpl;
+ const uchar *endp = p + w;
+ while (y < h) {
+ if (!d->getChar((char *)&b))
+ break;
+ if (b == 0) { // escape code
+ if (!d->getChar((char *)&b) || b == 1) {
+ y = h; // exit loop
+ } else switch (b) {
+ case 0: // end of line
+ x = 0;
+ y++;
+ p = data + (h-y-1)*bpl;
+ break;
+ case 2: // delta (jump)
+ {
+ quint8 tmp;
+ d->getChar((char *)&tmp);
+ x += tmp;
+ d->getChar((char *)&tmp);
+ y += tmp;
+ }
+
+ // Protection
+ if ((uint)x >= (uint)w)
+ x = w-1;
+ if ((uint)y >= (uint)h)
+ y = h-1;
+
+ p = data + (h-y-1)*bpl + x;
+ break;
+ default: // absolute mode
+ // Protection
+ if (p + b > endp)
+ b = endp-p;
+
+ i = (c = b)/2;
+ while (i--) {
+ d->getChar((char *)&b);
+ *p++ = b >> 4;
+ *p++ = b & 0x0f;
+ }
+ if (c & 1) {
+ unsigned char tmp;
+ d->getChar((char *)&tmp);
+ *p++ = tmp >> 4;
+ }
+ if ((((c & 3) + 1) & 2) == 2)
+ d->getChar(0); // align on word boundary
+ x += c;
+ }
+ } else { // encoded mode
+ // Protection
+ if (p + b > endp)
+ b = endp-p;
+
+ i = (c = b)/2;
+ d->getChar((char *)&b); // 2 pixels to be repeated
+ while (i--) {
+ *p++ = b >> 4;
+ *p++ = b & 0x0f;
+ }
+ if (c & 1)
+ *p++ = b >> 4;
+ x += c;
+ }
+ }
+ } else if (comp == BMP_RGB) { // no compression
+ memset(data, 0, h*bpl);
+ while (--h >= 0) {
+ if (d->read((char*)buf,buflen) != buflen)
+ break;
+ register uchar *p = data + h*bpl;
+ uchar *b = buf;
+ for (int i=0; i<w/2; i++) { // convert nibbles to bytes
+ *p++ = *b >> 4;
+ *p++ = *b++ & 0x0f;
+ }
+ if (w & 1) // the last nibble
+ *p = *b >> 4;
+ }
+ }
+ delete [] buf;
+ }
+
+ else if (nbits == 8) { // 8 bit BMP image
+ if (comp == BMP_RLE8) { // run length compression
+ int x=0, y=0;
+ quint8 b;
+ register uchar *p = data + (h-1)*bpl;
+ const uchar *endp = p + w;
+ while (y < h) {
+ if (!d->getChar((char *)&b))
+ break;
+ if (b == 0) { // escape code
+ if (!d->getChar((char *)&b) || b == 1) {
+ y = h; // exit loop
+ } else switch (b) {
+ case 0: // end of line
+ x = 0;
+ y++;
+ p = data + (h-y-1)*bpl;
+ break;
+ case 2: // delta (jump)
+ // Protection
+ if ((uint)x >= (uint)w)
+ x = w-1;
+ if ((uint)y >= (uint)h)
+ y = h-1;
+
+ {
+ quint8 tmp;
+ d->getChar((char *)&tmp);
+ x += tmp;
+ d->getChar((char *)&tmp);
+ y += tmp;
+ }
+ p = data + (h-y-1)*bpl + x;
+ break;
+ default: // absolute mode
+ // Protection
+ if (p + b > endp)
+ b = endp-p;
+
+ if (d->read((char *)p, b) != b)
+ return false;
+ if ((b & 1) == 1)
+ d->getChar(0); // align on word boundary
+ x += b;
+ p += b;
+ }
+ } else { // encoded mode
+ // Protection
+ if (p + b > endp)
+ b = endp-p;
+
+ char tmp;
+ d->getChar(&tmp);
+ memset(p, tmp, b); // repeat pixel
+ x += b;
+ p += b;
+ }
+ }
+ } else if (comp == BMP_RGB) { // uncompressed
+ while (--h >= 0) {
+ if (d->read((char *)data + h*bpl, bpl) != bpl)
+ break;
+ }
+ }
+ }
+
+ else if (nbits == 16 || nbits == 24 || nbits == 32) { // 16,24,32 bit BMP image
+ register QRgb *p;
+ QRgb *end;
+ uchar *buf24 = new uchar[bpl];
+ int bpl24 = ((w*nbits+31)/32)*4;
+ uchar *b;
+ int c;
+
+ while (--h >= 0) {
+ p = (QRgb *)(data + h*bpl);
+ end = p + w;
+ if (d->read((char *)buf24,bpl24) != bpl24)
+ break;
+ b = buf24;
+ while (p < end) {
+ c = *(uchar*)b | (*(uchar*)(b+1)<<8);
+ if (nbits != 16)
+ c |= *(uchar*)(b+2)<<16;
+ *p++ = qRgb(((c & red_mask) >> red_shift) * red_scale,
+ ((c & green_mask) >> green_shift) * green_scale,
+ ((c & blue_mask) >> blue_shift) * blue_scale);
+ b += nbits/8;
+ }
+ }
+ delete[] buf24;
+ }
+
+ if (bi.biHeight < 0) {
+ // Flip the image
+ uchar *buf = new uchar[bpl];
+ h = -bi.biHeight;
+ for (int y = 0; y < h/2; ++y) {
+ memcpy(buf, data + y*bpl, bpl);
+ memcpy(data + y*bpl, data + (h-y-1)*bpl, bpl);
+ memcpy(data + (h-y-1)*bpl, buf, bpl);
+ }
+ delete [] buf;
+ }
+
+ return true;
+}
+
+// this is also used in qmime_win.cpp
+bool qt_write_dib(QDataStream &s, QImage image)
+{
+ int nbits;
+ int bpl_bmp;
+ int bpl = image.bytesPerLine();
+
+ QIODevice* d = s.device();
+ if (!d->isWritable())
+ return false;
+
+ if (image.depth() == 8 && image.colorCount() <= 16) {
+ bpl_bmp = (((bpl+1)/2+3)/4)*4;
+ nbits = 4;
+ } else if (image.depth() == 32) {
+ bpl_bmp = ((image.width()*24+31)/32)*4;
+ nbits = 24;
+#ifdef Q_WS_QWS
+ } else if (image.depth() == 1 || image.depth() == 8) {
+ // Qt for Embedded Linux doesn't word align.
+ bpl_bmp = ((image.width()*image.depth()+31)/32)*4;
+ nbits = image.depth();
+#endif
+ } else {
+ bpl_bmp = bpl;
+ nbits = image.depth();
+ }
+
+ BMP_INFOHDR bi;
+ bi.biSize = BMP_WIN; // build info header
+ bi.biWidth = image.width();
+ bi.biHeight = image.height();
+ bi.biPlanes = 1;
+ bi.biBitCount = nbits;
+ bi.biCompression = BMP_RGB;
+ bi.biSizeImage = bpl_bmp*image.height();
+ bi.biXPelsPerMeter = image.dotsPerMeterX() ? image.dotsPerMeterX()
+ : 2834; // 72 dpi default
+ bi.biYPelsPerMeter = image.dotsPerMeterY() ? image.dotsPerMeterY() : 2834;
+ bi.biClrUsed = image.colorCount();
+ bi.biClrImportant = image.colorCount();
+ s << bi; // write info header
+ if (s.status() != QDataStream::Ok)
+ return false;
+
+ if (image.depth() != 32) { // write color table
+ uchar *color_table = new uchar[4*image.colorCount()];
+ uchar *rgb = color_table;
+ QVector<QRgb> c = image.colorTable();
+ for (int i=0; i<image.colorCount(); i++) {
+ *rgb++ = qBlue (c[i]);
+ *rgb++ = qGreen(c[i]);
+ *rgb++ = qRed (c[i]);
+ *rgb++ = 0;
+ }
+ if (d->write((char *)color_table, 4*image.colorCount()) == -1) {
+ delete [] color_table;
+ return false;
+ }
+ delete [] color_table;
+ }
+
+ if (image.format() == QImage::Format_MonoLSB)
+ image = image.convertToFormat(QImage::Format_Mono);
+
+ int y;
+
+ if (nbits == 1 || nbits == 8) { // direct output
+#ifdef Q_WS_QWS
+ // Qt for Embedded Linux doesn't word align.
+ int pad = bpl_bmp - bpl;
+ char padding[4];
+#endif
+ for (y=image.height()-1; y>=0; y--) {
+ if (d->write((char*)image.scanLine(y), bpl) == -1)
+ return false;
+#ifdef Q_WS_QWS
+ if (d->write(padding, pad) == -1)
+ return false;
+#endif
+ }
+ return true;
+ }
+
+ uchar *buf = new uchar[bpl_bmp];
+ uchar *b, *end;
+ register uchar *p;
+
+ memset(buf, 0, bpl_bmp);
+ for (y=image.height()-1; y>=0; y--) { // write the image bits
+ if (nbits == 4) { // convert 8 -> 4 bits
+ p = image.scanLine(y);
+ b = buf;
+ end = b + image.width()/2;
+ while (b < end) {
+ *b++ = (*p << 4) | (*(p+1) & 0x0f);
+ p += 2;
+ }
+ if (image.width() & 1)
+ *b = *p << 4;
+ } else { // 32 bits
+ QRgb *p = (QRgb *)image.scanLine(y);
+ QRgb *end = p + image.width();
+ b = buf;
+ while (p < end) {
+ *b++ = qBlue(*p);
+ *b++ = qGreen(*p);
+ *b++ = qRed(*p);
+ p++;
+ }
+ }
+ if (bpl_bmp != d->write((char*)buf, bpl_bmp)) {
+ delete[] buf;
+ return false;
+ }
+ }
+ delete[] buf;
+ return true;
+}
+
+// this is also used in qmime_win.cpp
+bool qt_read_dib(QDataStream &s, QImage &image)
+{
+ BMP_INFOHDR bi;
+ if (!read_dib_infoheader(s, bi))
+ return false;
+ return read_dib_body(s, bi, -1, -BMP_FILEHDR_SIZE, image);
+}
+
+QBmpHandler::QBmpHandler()
+ : state(Ready)
+{
+}
+
+bool QBmpHandler::readHeader()
+{
+ state = Error;
+
+ QIODevice *d = device();
+ QDataStream s(d);
+ startpos = d->pos();
+
+ // Intel byte order
+ s.setByteOrder(QDataStream::LittleEndian);
+
+ // read BMP file header
+ if (!read_dib_fileheader(s, fileHeader))
+ return false;
+
+ // read BMP info header
+ if (!read_dib_infoheader(s, infoHeader))
+ return false;
+
+ state = ReadHeader;
+ return true;
+}
+
+bool QBmpHandler::canRead() const
+{
+ if (state == Ready && !canRead(device()))
+ return false;
+
+ if (state != Error) {
+ setFormat("bmp");
+ return true;
+ }
+
+ return false;
+}
+
+bool QBmpHandler::canRead(QIODevice *device)
+{
+ if (!device) {
+ qWarning("QBmpHandler::canRead() called with 0 pointer");
+ return false;
+ }
+
+ char head[2];
+ if (device->peek(head, sizeof(head)) != sizeof(head))
+ return false;
+
+ return (qstrncmp(head, "BM", 2) == 0);
+}
+
+bool QBmpHandler::read(QImage *image)
+{
+ if (state == Error)
+ return false;
+
+ if (!image) {
+ qWarning("QBmpHandler::read: cannot read into null pointer");
+ return false;
+ }
+
+ if (state == Ready && !readHeader()) {
+ state = Error;
+ return false;
+ }
+
+ QIODevice *d = device();
+ QDataStream s(d);
+
+ // Intel byte order
+ s.setByteOrder(QDataStream::LittleEndian);
+
+ // read image
+ if (!read_dib_body(s, infoHeader, fileHeader.bfOffBits, startpos, *image))
+ return false;
+
+ state = Ready;
+ return true;
+}
+
+bool QBmpHandler::write(const QImage &img)
+{
+ QImage image;
+ switch (img.format()) {
+ case QImage::Format_ARGB8565_Premultiplied:
+ case QImage::Format_ARGB8555_Premultiplied:
+ case QImage::Format_ARGB6666_Premultiplied:
+ case QImage::Format_ARGB4444_Premultiplied:
+ image = img.convertToFormat(QImage::Format_ARGB32);
+ break;
+ case QImage::Format_RGB16:
+ case QImage::Format_RGB888:
+ case QImage::Format_RGB666:
+ case QImage::Format_RGB555:
+ case QImage::Format_RGB444:
+ image = img.convertToFormat(QImage::Format_RGB32);
+ break;
+ default:
+ image = img;
+ }
+
+ QIODevice *d = device();
+ QDataStream s(d);
+ BMP_FILEHDR bf;
+ int bpl_bmp;
+ int bpl = image.bytesPerLine();
+
+ // Code partially repeated in qt_write_dib
+ if (image.depth() == 8 && image.colorCount() <= 16) {
+ bpl_bmp = (((bpl+1)/2+3)/4)*4;
+ } else if (image.depth() == 32) {
+ bpl_bmp = ((image.width()*24+31)/32)*4;
+ } else {
+ bpl_bmp = bpl;
+ }
+
+ // Intel byte order
+ s.setByteOrder(QDataStream::LittleEndian);
+
+ // build file header
+ memcpy(bf.bfType, "BM", 2);
+
+ // write file header
+ bf.bfReserved1 = 0;
+ bf.bfReserved2 = 0;
+ bf.bfOffBits = BMP_FILEHDR_SIZE + BMP_WIN + image.colorCount() * 4;
+ bf.bfSize = bf.bfOffBits + bpl_bmp*image.height();
+ s << bf;
+
+ // write image
+ return qt_write_dib(s, image);
+}
+
+bool QBmpHandler::supportsOption(ImageOption option) const
+{
+ return option == Size
+ || option == ImageFormat;
+}
+
+QVariant QBmpHandler::option(ImageOption option) const
+{
+ if (option == Size) {
+ if (state == Error)
+ return QVariant();
+ if (state == Ready && !const_cast<QBmpHandler*>(this)->readHeader())
+ return QVariant();
+ return QSize(infoHeader.biWidth, infoHeader.biHeight);
+ } else if (option == ImageFormat) {
+ if (state == Error)
+ return QVariant();
+ if (state == Ready && !const_cast<QBmpHandler*>(this)->readHeader())
+ return QVariant();
+ QImage::Format format;
+ switch (infoHeader.biBitCount) {
+ case 32:
+ case 24:
+ case 16:
+ format = QImage::Format_RGB32;
+ break;
+ case 8:
+ case 4:
+ format = QImage::Format_Indexed8;
+ break;
+ default:
+ format = QImage::Format_Mono;
+ }
+ return format;
+ }
+ return QVariant();
+}
+
+void QBmpHandler::setOption(ImageOption option, const QVariant &value)
+{
+ Q_UNUSED(option);
+ Q_UNUSED(value);
+}
+
+QByteArray QBmpHandler::name() const
+{
+ return "bmp";
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_IMAGEFORMAT_BMP
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 17:31:31 +0000