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/*!
\class QtIcoHandler
\since 4.4
\brief The QtIcoHandler class provides support for the ICO image format.
\internal
*/
#include "qicohandler.h"
#include <QtCore/qendian.h>
#include <QtGui/QImage>
#include <QtCore/QFile>
#include <QtCore/QBuffer>
// These next two structs represent how the icon information is stored
// in an ICO file.
typedef struct
{
quint8 bWidth; // Width of the image
quint8 bHeight; // Height of the image (times 2)
quint8 bColorCount; // Number of colors in image (0 if >=8bpp) [ not ture ]
quint8 bReserved; // Reserved
quint16 wPlanes; // Color Planes
quint16 wBitCount; // Bits per pixel
quint32 dwBytesInRes; // how many bytes in this resource?
quint32 dwImageOffset; // where in the file is this image
} ICONDIRENTRY, *LPICONDIRENTRY;
#define ICONDIRENTRY_SIZE 16
typedef struct
{
quint16 idReserved; // Reserved
quint16 idType; // resource type (1 for icons)
quint16 idCount; // how many images?
ICONDIRENTRY idEntries[1]; // the entries for each image
} ICONDIR, *LPICONDIR;
#define ICONDIR_SIZE 6 // Exclude the idEntries field
typedef struct { // BMP information header
quint32 biSize; // size of this struct
quint32 biWidth; // pixmap width
quint32 biHeight; // pixmap height (specifies the combined height of the XOR and AND masks)
quint16 biPlanes; // should be 1
quint16 biBitCount; // number of bits per pixel
quint32 biCompression; // compression method
quint32 biSizeImage; // size of image
quint32 biXPelsPerMeter; // horizontal resolution
quint32 biYPelsPerMeter; // vertical resolution
quint32 biClrUsed; // number of colors used
quint32 biClrImportant; // number of important colors
} BMP_INFOHDR ,*LPBMP_INFOHDR;
#define BMP_INFOHDR_SIZE 40
class ICOReader
{
public:
ICOReader(QIODevice * iodevice);
int count();
QImage iconAt(int index);
static bool canRead(QIODevice *iodev);
static QList<QImage> read(QIODevice * device);
static bool write(QIODevice * device, const QList<QImage> & images);
private:
bool readHeader();
bool readIconEntry(int index, ICONDIRENTRY * iconEntry);
bool readBMPHeader(quint32 imageOffset, BMP_INFOHDR * header);
void findColorInfo(QImage & image);
void readColorTable(QImage & image);
void readBMP(QImage & image);
void read1BitBMP(QImage & image);
void read4BitBMP(QImage & image);
void read8BitBMP(QImage & image);
void read16_24_32BMP(QImage & image);
struct IcoAttrib
{
int nbits;
int ncolors;
int h;
int w;
int depth;
} icoAttrib;
QIODevice * iod;
qint64 startpos;
bool headerRead;
ICONDIR iconDir;
};
// Data readers and writers that takes care of alignment and endian stuff.
static bool readIconDirEntry(QIODevice *iodev, ICONDIRENTRY *iconDirEntry)
{
if (iodev) {
uchar tmp[ICONDIRENTRY_SIZE];
if (iodev->read((char*)tmp, ICONDIRENTRY_SIZE) == ICONDIRENTRY_SIZE) {
iconDirEntry->bWidth = tmp[0];
iconDirEntry->bHeight = tmp[1];
iconDirEntry->bColorCount = tmp[2];
iconDirEntry->bReserved = tmp[3];
iconDirEntry->wPlanes = qFromLittleEndian<quint16>(&tmp[4]);
iconDirEntry->wBitCount = qFromLittleEndian<quint16>(&tmp[6]);
iconDirEntry->dwBytesInRes = qFromLittleEndian<quint32>(&tmp[8]);
iconDirEntry->dwImageOffset = qFromLittleEndian<quint32>(&tmp[12]);
return true;
}
}
return false;
}
static bool writeIconDirEntry(QIODevice *iodev, const ICONDIRENTRY &iconEntry)
{
if (iodev) {
uchar tmp[ICONDIRENTRY_SIZE];
tmp[0] = iconEntry.bWidth;
tmp[1] = iconEntry.bHeight;
tmp[2] = iconEntry.bColorCount;
tmp[3] = iconEntry.bReserved;
qToLittleEndian<quint16>(iconEntry.wPlanes, &tmp[4]);
qToLittleEndian<quint16>(iconEntry.wBitCount, &tmp[6]);
qToLittleEndian<quint32>(iconEntry.dwBytesInRes, &tmp[8]);
qToLittleEndian<quint32>(iconEntry.dwImageOffset, &tmp[12]);
return (iodev->write((char*)tmp, ICONDIRENTRY_SIZE) == ICONDIRENTRY_SIZE) ? true : false;
}
return false;
}
static bool readIconDir(QIODevice *iodev, ICONDIR *iconDir)
{
if (iodev) {
uchar tmp[ICONDIR_SIZE];
if (iodev->read((char*)tmp, ICONDIR_SIZE) == ICONDIR_SIZE) {
iconDir->idReserved = qFromLittleEndian<quint16>(&tmp[0]);
iconDir->idType = qFromLittleEndian<quint16>(&tmp[2]);
iconDir->idCount = qFromLittleEndian<quint16>(&tmp[4]);
return true;
}
}
return false;
}
static bool writeIconDir(QIODevice *iodev, const ICONDIR &iconDir)
{
if (iodev) {
uchar tmp[6];
qToLittleEndian(iconDir.idReserved, tmp);
qToLittleEndian(iconDir.idType, &tmp[2]);
qToLittleEndian(iconDir.idCount, &tmp[4]);
return (iodev->write((char*)tmp, 6) == 6) ? true : false;
}
return false;
}
static bool readBMPInfoHeader(QIODevice *iodev, BMP_INFOHDR *pHeader)
{
if (iodev) {
uchar header[BMP_INFOHDR_SIZE];
if (iodev->read((char*)header, BMP_INFOHDR_SIZE) == BMP_INFOHDR_SIZE) {
pHeader->biSize = qFromLittleEndian<quint32>(&header[0]);
pHeader->biWidth = qFromLittleEndian<quint32>(&header[4]);
pHeader->biHeight = qFromLittleEndian<quint32>(&header[8]);
pHeader->biPlanes = qFromLittleEndian<quint16>(&header[12]);
pHeader->biBitCount = qFromLittleEndian<quint16>(&header[14]);
pHeader->biCompression = qFromLittleEndian<quint32>(&header[16]);
pHeader->biSizeImage = qFromLittleEndian<quint32>(&header[20]);
pHeader->biXPelsPerMeter = qFromLittleEndian<quint32>(&header[24]);
pHeader->biYPelsPerMeter = qFromLittleEndian<quint32>(&header[28]);
pHeader->biClrUsed = qFromLittleEndian<quint32>(&header[32]);
pHeader->biClrImportant = qFromLittleEndian<quint32>(&header[36]);
return true;
}
}
return false;
}
static bool writeBMPInfoHeader(QIODevice *iodev, const BMP_INFOHDR &header)
{
if (iodev) {
uchar tmp[BMP_INFOHDR_SIZE];
qToLittleEndian<quint32>(header.biSize, &tmp[0]);
qToLittleEndian<quint32>(header.biWidth, &tmp[4]);
qToLittleEndian<quint32>(header.biHeight, &tmp[8]);
qToLittleEndian<quint16>(header.biPlanes, &tmp[12]);
qToLittleEndian<quint16>(header.biBitCount, &tmp[14]);
qToLittleEndian<quint32>(header.biCompression, &tmp[16]);
qToLittleEndian<quint32>(header.biSizeImage, &tmp[20]);
qToLittleEndian<quint32>(header.biXPelsPerMeter, &tmp[24]);
qToLittleEndian<quint32>(header.biYPelsPerMeter, &tmp[28]);
qToLittleEndian<quint32>(header.biClrUsed, &tmp[32]);
qToLittleEndian<quint32>(header.biClrImportant, &tmp[36]);
return (iodev->write((char*)tmp, BMP_INFOHDR_SIZE) == BMP_INFOHDR_SIZE) ? true : false;
}
return false;
}
ICOReader::ICOReader(QIODevice * iodevice)
: iod(iodevice)
, startpos(0)
, headerRead(false)
{
}
int ICOReader::count()
{
if (readHeader())
return iconDir.idCount;
return 0;
}
bool ICOReader::canRead(QIODevice *iodev)
{
bool isProbablyICO = false;
if (iodev) {
qint64 oldPos = iodev->pos();
ICONDIR ikonDir;
if (readIconDir(iodev, &ikonDir)) {
qint64 readBytes = ICONDIR_SIZE;
if (readIconDirEntry(iodev, &ikonDir.idEntries[0])) {
readBytes += ICONDIRENTRY_SIZE;
// ICO format does not have a magic identifier, so we read 6 different values, which will hopefully be enough to identify the file.
if ( ikonDir.idReserved == 0
&& ikonDir.idType == 1
&& ikonDir.idEntries[0].bReserved == 0
&& ikonDir.idEntries[0].wPlanes <= 1
&& ikonDir.idEntries[0].wBitCount <= 32 // Bits per pixel
&& ikonDir.idEntries[0].dwBytesInRes >= 40 // Must be over 40, since sizeof (infoheader) == 40
) {
isProbablyICO = true;
}
if (iodev->isSequential()) {
// Our structs might be padded due to alignment, so we need to fetch each member before we ungetChar() !
quint32 tmp = ikonDir.idEntries[0].dwImageOffset;
iodev->ungetChar((tmp >> 24) & 0xff);
iodev->ungetChar((tmp >> 16) & 0xff);
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
tmp = ikonDir.idEntries[0].dwBytesInRes;
iodev->ungetChar((tmp >> 24) & 0xff);
iodev->ungetChar((tmp >> 16) & 0xff);
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
tmp = ikonDir.idEntries[0].wBitCount;
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
tmp = ikonDir.idEntries[0].wPlanes;
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
iodev->ungetChar(ikonDir.idEntries[0].bReserved);
iodev->ungetChar(ikonDir.idEntries[0].bColorCount);
iodev->ungetChar(ikonDir.idEntries[0].bHeight);
iodev->ungetChar(ikonDir.idEntries[0].bWidth);
}
}
if (iodev->isSequential()) {
// Our structs might be padded due to alignment, so we need to fetch each member before we ungetChar() !
quint32 tmp = ikonDir.idCount;
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
tmp = ikonDir.idType;
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
tmp = ikonDir.idReserved;
iodev->ungetChar((tmp >> 8) & 0xff);
iodev->ungetChar(tmp & 0xff);
}
}
if (!iodev->isSequential()) iodev->seek(oldPos);
}
return isProbablyICO;
}
bool ICOReader::readHeader()
{
if (iod && !headerRead) {
startpos = iod->pos();
if (readIconDir(iod, &iconDir)) {
if (iconDir.idReserved == 0 || iconDir.idType == 1)
headerRead = true;
}
}
return headerRead;
}
bool ICOReader::readIconEntry(int index, ICONDIRENTRY *iconEntry)
{
if (iod) {
if (iod->seek(startpos + ICONDIR_SIZE + (index * ICONDIRENTRY_SIZE))) {
return readIconDirEntry(iod, iconEntry);
}
}
return false;
}
bool ICOReader::readBMPHeader(quint32 imageOffset, BMP_INFOHDR * header)
{
if (iod) {
if (iod->seek(startpos + imageOffset)) {
if (readBMPInfoHeader(iod, header)) {
return TRUE;
}
}
}
return FALSE;
}
void ICOReader::findColorInfo(QImage & image)
{
if (icoAttrib.ncolors > 0) { // set color table
readColorTable(image);
} else if (icoAttrib.nbits == 16) { // don't support RGB values for 15/16 bpp
image = QImage();
}
}
void ICOReader::readColorTable(QImage & image)
{
if (iod) {
image.setColorCount(icoAttrib.ncolors);
uchar rgb[4];
for (int i=0; i<icoAttrib.ncolors; i++) {
if (iod->read((char*)rgb, 4) != 4) {
image = QImage();
break;
}
image.setColor(i, qRgb(rgb[2],rgb[1],rgb[0]));
}
} else {
image = QImage();
}
}
void ICOReader::readBMP(QImage & image)
{
if (icoAttrib.nbits == 1) { // 1 bit BMP image
read1BitBMP(image);
} else if (icoAttrib.nbits == 4) { // 4 bit BMP image
read4BitBMP(image);
} else if (icoAttrib.nbits == 8) {
read8BitBMP(image);
} else if (icoAttrib.nbits == 16 || icoAttrib.nbits == 24 || icoAttrib.nbits == 32 ) { // 16,24,32 bit BMP image
read16_24_32BMP(image);
}
}
/**
* NOTE: A 1 bit BMP is only flipped vertically, and not horizontally like all other color depths!
* (This is the same with the bitmask)
*
*/
void ICOReader::read1BitBMP(QImage & image)
{
if (iod) {
int h = image.height();
int bpl = image.bytesPerLine();
while (--h >= 0) {
if (iod->read((char*)image.scanLine(h),bpl) != bpl) {
image = QImage();
break;
}
}
} else {
image = QImage();
}
}
void ICOReader::read4BitBMP(QImage & image)
{
if (iod) {
int h = icoAttrib.h;
int buflen = ((icoAttrib.w+7)/8)*4;
uchar *buf = new uchar[buflen];
Q_CHECK_PTR(buf);
while (--h >= 0) {
if (iod->read((char*)buf,buflen) != buflen) {
image = QImage();
break;
}
register uchar *p = image.scanLine(h);
uchar *b = buf;
for (int i=0; i<icoAttrib.w/2; i++) { // convert nibbles to bytes
*p++ = *b >> 4;
*p++ = *b++ & 0x0f;
}
if (icoAttrib.w & 1) // the last nibble
*p = *b >> 4;
}
delete [] buf;
} else {
image = QImage();
}
}
void ICOReader::read8BitBMP(QImage & image)
{
if (iod) {
int h = icoAttrib.h;
int bpl = image.bytesPerLine();
while (--h >= 0) {
if (iod->read((char *)image.scanLine(h), bpl) != bpl) {
image = QImage();
break;
}
}
} else {
image = QImage();
}
}
void ICOReader::read16_24_32BMP(QImage & image)
{
if (iod) {
int h = icoAttrib.h;
register QRgb *p;
QRgb *end;
uchar *buf = new uchar[image.bytesPerLine()];
int bpl = ((icoAttrib.w*icoAttrib.nbits+31)/32)*4;
uchar *b;
while (--h >= 0) {
p = (QRgb *)image.scanLine(h);
end = p + icoAttrib.w;
if (iod->read((char *)buf, bpl) != bpl) {
image = QImage();
break;
}
b = buf;
while (p < end) {
if (icoAttrib.nbits == 24)
*p++ = qRgb(*(b+2), *(b+1), *b);
else if (icoAttrib.nbits == 32)
*p++ = qRgba(*(b+2), *(b+1), *b, *(b+3));
b += icoAttrib.nbits/8;
}
}
delete[] buf;
} else {
image = QImage();
}
}
QImage ICOReader::iconAt(int index)
{
QImage img;
if (count() > index) { // forces header to be read
ICONDIRENTRY iconEntry;
if (readIconEntry(index, &iconEntry)) {
static const uchar pngMagicData[] = { 137, 80, 78, 71, 13, 10, 26, 10 };
iod->seek(iconEntry.dwImageOffset);
const QByteArray pngMagic = QByteArray::fromRawData((char*)pngMagicData, sizeof(pngMagicData));
const bool isPngImage = (iod->read(pngMagic.size()) == pngMagic);
if (isPngImage) {
iod->seek(iconEntry.dwImageOffset);
return QImage::fromData(iod->read(iconEntry.dwBytesInRes), "png");
}
BMP_INFOHDR header;
if (readBMPHeader(iconEntry.dwImageOffset, &header)) {
icoAttrib.nbits = header.biBitCount ? header.biBitCount : iconEntry.wBitCount;
switch (icoAttrib.nbits) {
case 32:
case 24:
case 16:
icoAttrib.depth = 32;
break;
case 8:
case 4:
icoAttrib.depth = 8;
break;
default:
icoAttrib.depth = 1;
}
if (icoAttrib.depth == 32) // there's no colormap
icoAttrib.ncolors = 0;
else // # colors used
icoAttrib.ncolors = header.biClrUsed ? header.biClrUsed : 1 << icoAttrib.nbits;
icoAttrib.w = iconEntry.bWidth;
icoAttrib.h = iconEntry.bHeight;
QImage::Format format = QImage::Format_ARGB32;
if (icoAttrib.nbits == 24)
format = QImage::Format_RGB32;
else if (icoAttrib.ncolors == 2)
format = QImage::Format_Mono;
else if (icoAttrib.ncolors > 0)
format = QImage::Format_Indexed8;
QImage image(icoAttrib.w, icoAttrib.h, format);
if (!image.isNull()) {
findColorInfo(image);
if (!image.isNull()) {
readBMP(image);
if (!image.isNull()) {
QImage mask(image.width(), image.height(), QImage::Format_Mono);
if (!mask.isNull()) {
mask.setColorCount(2);
mask.setColor(0, qRgba(255,255,255,0xff));
mask.setColor(1, qRgba(0 ,0 ,0 ,0xff));
read1BitBMP(mask);
if (!mask.isNull()) {
img = QImage(image.width(), image.height(), QImage::Format_ARGB32 );
img = image;
img.setAlphaChannel(mask);
// (Luckily, it seems that setAlphaChannel() does not ruin the alpha values
// of partially transparent pixels in those icons that have that)
}
}
}
}
}
}
}
}
return img;
}
/*!
Reads all the icons from the given \a device, and returns them as
a list of QImage objects.
Each image has an alpha channel that represents the mask from the
corresponding icon.
\sa write()
*/
QList<QImage> ICOReader::read(QIODevice * device)
{
QList<QImage> images;
ICOReader reader(device);
for (int i = 0; i < reader.count(); i++)
images += reader.iconAt(i);
return images;
}
/*!
Writes all the QImages in the \a images list to the given \a
device. Returns true if the images are written successfully;
otherwise returns false.
The first image in the list is stored as the first icon in the
device, and is therefore used as the default icon by applications.
The alpha channel of each image is converted to a mask for each
corresponding icon.
\sa read()
*/
bool ICOReader::write(QIODevice * device, const QList<QImage> & images)
{
bool retValue = false;
if (images.count()) {
qint64 origOffset = device->pos();
ICONDIR id;
id.idReserved = 0;
id.idType = 1;
id.idCount = images.count();
ICONDIRENTRY * entries = new ICONDIRENTRY[id.idCount];
BMP_INFOHDR * bmpHeaders = new BMP_INFOHDR[id.idCount];
QByteArray * imageData = new QByteArray[id.idCount];
for (int i=0; i<id.idCount; i++) {
QImage image = images[i];
// Scale down the image if it is larger than 128 pixels in either width or height
if (image.width() > 128 || image.height() > 128)
{
image = image.scaled(128, 128, Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
QImage maskImage(image.width(), image.height(), QImage::Format_Mono);
image = image.convertToFormat(QImage::Format_ARGB32);
if (image.hasAlphaChannel()) {
maskImage = image.createAlphaMask();
} else {
maskImage.fill(0xff);
}
maskImage = maskImage.convertToFormat(QImage::Format_Mono);
int nbits = 32;
int bpl_bmp = ((image.width()*nbits+31)/32)*4;
entries[i].bColorCount = 0;
entries[i].bReserved = 0;
entries[i].wBitCount = nbits;
entries[i].bHeight = image.height();
entries[i].bWidth = image.width();
entries[i].dwBytesInRes = BMP_INFOHDR_SIZE + (bpl_bmp * image.height())
+ (maskImage.bytesPerLine() * maskImage.height());
entries[i].wPlanes = 1;
if (i == 0)
entries[i].dwImageOffset = origOffset + ICONDIR_SIZE
+ (id.idCount * ICONDIRENTRY_SIZE);
else
entries[i].dwImageOffset = entries[i-1].dwImageOffset + entries[i-1].dwBytesInRes;
bmpHeaders[i].biBitCount = entries[i].wBitCount;
bmpHeaders[i].biClrImportant = 0;
bmpHeaders[i].biClrUsed = entries[i].bColorCount;
bmpHeaders[i].biCompression = 0;
bmpHeaders[i].biHeight = entries[i].bHeight * 2; // 2 is for the mask
bmpHeaders[i].biPlanes = entries[i].wPlanes;
bmpHeaders[i].biSize = BMP_INFOHDR_SIZE;
bmpHeaders[i].biSizeImage = entries[i].dwBytesInRes - BMP_INFOHDR_SIZE;
bmpHeaders[i].biWidth = entries[i].bWidth;
bmpHeaders[i].biXPelsPerMeter = 0;
bmpHeaders[i].biYPelsPerMeter = 0;
QBuffer buffer(&imageData[i]);
buffer.open(QIODevice::WriteOnly);
uchar *buf = new uchar[bpl_bmp];
uchar *b;
memset( buf, 0, bpl_bmp );
int y;
for (y = image.height() - 1; y >= 0; y--) { // write the image bits
// 32 bits
QRgb *p = (QRgb *)image.scanLine(y);
QRgb *end = p + image.width();
b = buf;
int x = 0;
while (p < end) {
*b++ = qBlue(*p);
*b++ = qGreen(*p);
*b++ = qRed(*p);
*b++ = qAlpha(*p);
if (qAlpha(*p) > 0) // Even mostly transparent pixels must not be masked away
maskImage.setPixel(x, y, Qt::color1); // (i.e. createAlphaMask() takes away too much)
p++;
x++;
}
buffer.write((char*)buf, bpl_bmp);
}
delete[] buf;
maskImage.invertPixels(); // seems as though it needs this
// NOTE! !! The mask is only flipped vertically - not horizontally !!
for (y = maskImage.height() - 1; y >= 0; y--)
buffer.write((char*)maskImage.scanLine(y), maskImage.bytesPerLine());
}
if (writeIconDir(device, id)) {
int i;
bool bOK = true;
for (i = 0; i < id.idCount && bOK; i++) {
bOK = writeIconDirEntry(device, entries[i]);
}
if (bOK) {
for (i = 0; i < id.idCount && bOK; i++) {
bOK = writeBMPInfoHeader(device, bmpHeaders[i]);
bOK &= (device->write(imageData[i]) == (int) imageData[i].size());
}
retValue = bOK;
}
}
delete [] entries;
delete [] bmpHeaders;
delete [] imageData;
}
return retValue;
}
/*!
Constructs an instance of QtIcoHandler initialized to use \a device.
*/
QtIcoHandler::QtIcoHandler(QIODevice *device)
{
m_currentIconIndex = 0;
setDevice(device);
m_pICOReader = new ICOReader(device);
}
/*!
Destructor for QtIcoHandler.
*/
QtIcoHandler::~QtIcoHandler()
{
delete m_pICOReader;
}
/*!
* Verifies if some values (magic bytes) are set as expected in the header of the file.
* If the magic bytes were found, it is assumed that the QtIcoHandler can read the file.
*
*/
bool QtIcoHandler::canRead() const
{
bool bCanRead = false;
QIODevice *device = QImageIOHandler::device();
if (device) {
bCanRead = ICOReader::canRead(device);
if (bCanRead)
setFormat("ico");
} else {
qWarning("QtIcoHandler::canRead() called with no device");
}
return bCanRead;
}
/*! This static function is used by the plugin code, and is provided for convenience only.
\a device must be an opened device with pointing to the start of the header data of the ICO file.
*/
bool QtIcoHandler::canRead(QIODevice *device)
{
Q_ASSERT(device);
return ICOReader::canRead(device);
}
/*! \reimp
*/
bool QtIcoHandler::read(QImage *image)
{
bool bSuccess = false;
QImage img = m_pICOReader->iconAt(m_currentIconIndex);
// Make sure we only write to \a image when we succeed.
if (!img.isNull()) {
bSuccess = true;
*image = img;
}
return bSuccess;
}
/*! \reimp
*/
bool QtIcoHandler::write(const QImage &image)
{
QIODevice *device = QImageIOHandler::device();
QList<QImage> imgs;
imgs.append(image);
return ICOReader::write(device, imgs);
}
/*!
* Return the common identifier of the format.
* For ICO format this will return "ico".
*/
QByteArray QtIcoHandler::name() const
{
return "ico";
}
/*! \reimp
*/
int QtIcoHandler::imageCount() const
{
return m_pICOReader->count();
}
/*! \reimp
*/
bool QtIcoHandler::jumpToImage(int imageNumber)
{
if (imageNumber < imageCount()) {
m_currentIconIndex = imageNumber;
}
return (imageNumber < imageCount()) ? true : false;
}
/*! \reimp
*/
bool QtIcoHandler::jumpToNextImage()
{
return jumpToImage(m_currentIconIndex + 1);
}