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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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 "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) {
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; // Windows BMP v3 size
const int BMP_OS2 = 64; // new OS/2 BMP size
const int BMP_WIN4 = 108; // Windows BMP v4 size
const int BMP_WIN5 = 124; // Windows BMP v5 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 || bi.biSize == BMP_WIN4 || bi.biSize == BMP_WIN5) {
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(uint 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
if (bi.biWidth < 0 || quint64(bi.biWidth) * qAbs(bi.biHeight) > 16384 * 16384)
return false;
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;
uint red_mask = 0;
uint green_mask = 0;
uint 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 >= BMP_WIN4? BMP_WIN : bi.biSize)); // goto start of colormap
if (bi.biSize >= BMP_WIN4 || (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;
// Read BMP v4+ header
if (bi.biSize >= BMP_WIN4) {
int alpha_mask = 0;
int CSType = 0;
int gamma_red = 0;
int gamma_green = 0;
int gamma_blue = 0;
int endpoints[9];
if (d->read((char *)&alpha_mask, sizeof(alpha_mask)) != sizeof(alpha_mask))
return false;
if (d->read((char *)&CSType, sizeof(CSType)) != sizeof(CSType))
return false;
if (d->read((char *)&endpoints, sizeof(endpoints)) != sizeof(endpoints))
return false;
if (d->read((char *)&gamma_red, sizeof(gamma_red)) != sizeof(gamma_red))
return false;
if (d->read((char *)&gamma_green, sizeof(gamma_green)) != sizeof(gamma_green))
return false;
if (d->read((char *)&gamma_blue, sizeof(gamma_blue)) != sizeof(gamma_blue))
return false;
if (bi.biSize == BMP_WIN5) {
qint32 intent = 0;
qint32 profileData = 0;
qint32 profileSize = 0;
qint32 reserved = 0;
if (d->read((char *)&intent, sizeof(intent)) != sizeof(intent))
return false;
if (d->read((char *)&profileData, sizeof(profileData)) != sizeof(profileData))
return false;
if (d->read((char *)&profileSize, sizeof(profileSize)) != sizeof(profileSize))
return false;
if (d->read((char *)&reserved, sizeof(reserved)) != sizeof(reserved) || reserved != 0)
return false;
}
}
}
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)) {
red_shift = calc_shift(red_mask);
if (((red_mask >> red_shift) + 1) == 0)
return false;
red_scale = 256 / ((red_mask >> red_shift) + 1);
green_shift = calc_shift(green_mask);
if (((green_mask >> green_shift) + 1) == 0)
return false;
green_scale = 256 / ((green_mask >> green_shift) + 1);
blue_shift = calc_shift(blue_mask);
if (((blue_mask >> blue_shift) + 1) == 0)
return false;
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;
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;
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;
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;
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
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
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