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Avoid unnecessary detach when saving to BMP.

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Task-number: QTBUG-11486

Change-Id: Ic9aa733da4f23dc3eaba111c97a39bfd911f8cb3
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
This commit is contained in:
Kim Motoyoshi Kalland 2012-06-19 14:18:16 +02:00 committed by Qt by Nokia
parent 1838a6c2fb
commit c7e21f3923
1 changed files with 5 additions and 5 deletions
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10
src/gui/image/qbmphandler.cpp
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@ -624,7 +624,7 @@ bool qt_write_dib(QDataStream &s, QImage image)
if (nbits == 1 || nbits == 8) { // direct output
for (y=image.height()-1; y>=0; y--) {
if (d->write((char*)image.scanLine(y), bpl) == -1)
if (d->write((char*)image.constScanLine(y), bpl) == -1)
return false;
}
return true;
@ -632,12 +632,12 @@ bool qt_write_dib(QDataStream &s, QImage image)
uchar *buf = new uchar[bpl_bmp];
uchar *b, *end;
register uchar *p;
register const 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);
p = image.constScanLine(y);
b = buf;
end = b + image.width()/2;
while (b < end) {
@ -647,8 +647,8 @@ bool qt_write_dib(QDataStream &s, QImage image)
if (image.width() & 1)
*b = *p << 4;
} else { // 32 bits
QRgb *p = (QRgb *)image.scanLine(y);
QRgb *end = p + image.width();
const QRgb *p = (const QRgb *)image.constScanLine(y);
const QRgb *end = p + image.width();
b = buf;
while (p < end) {
*b++ = qBlue(*p);