void AdobeSurfacePrivate::clear( const QRect & area )
{
#ifndef USE_PIXMAP
int stride = image_.bytesPerLine();
#else
qDebug("AdobeSurfacePrivate::clear %d", image_.qwsBytesPerLine());
int stride = image_.qwsBytesPerLine();
#endif
int bytes_per_pixel = image_.depth() / 8;
if (bytes_per_pixel < 1)
{
bytes_per_pixel = 1;
}
// get the overlap area to prevent out-of-bounding accessing
QRect actual_area = image_.rect().intersect( area );
#ifndef USE_PIXMAP
const uchar * buf = image_.bits();
#else
const uchar * buf = image_.qwsBits();
#endif
unsigned char * data = (uchar*)buf + stride * actual_area.top() +
bytes_per_pixel * actual_area.left();
for ( int y = actual_area.top(); y < actual_area.bottom(); ++y )
{
memset( data, 255, actual_area.width() * bytes_per_pixel );
data = (uchar*)buf + stride * (y + 1) + bytes_per_pixel * actual_area.left();
}
}
unsigned char* AdobeSurfacePrivate::checkOut( int xMin, int yMin, int xMax, int yMax, size_t * stride )
{
#ifndef USE_PIXMAP
*stride = image_.bytesPerLine();
#else
*stride = image_.qwsBytesPerLine();
#endif
int bytes_per_pixel = image_.depth() / 8;
if (bytes_per_pixel < 1)
{
bytes_per_pixel = 1;
}
#ifndef USE_PIXMAP
const uchar * buf = image_.bits();
#else
const uchar * buf = image_.qwsBits();
#endif
return (uchar*)buf + (*stride) * yMin + bytes_per_pixel * xMin;
}
