void
JB2Dict::JB2Codec::code_bitmap_by_cross_coding (GBitmap &bm, GP<GBitmap> &cbm, const int libno)
{
// Make sure bitmaps will not be disturbed
GP<GBitmap> copycbm=GBitmap::create();
if (cbm->monitor())
{
// Perform a copy when the bitmap is explicitely shared
GMonitorLock lock2(cbm->monitor());
copycbm->init(*cbm);
cbm = copycbm;
}
GMonitorLock lock1(bm.monitor());
// Center bitmaps
const int cw = cbm->columns();
const int dw = bm.columns();
const int dh = bm.rows();
const LibRect &l = libinfo[libno];
const int xd2c = (dw/2 - dw + 1) - ((l.right - l.left + 1)/2 - l.right);
const int yd2c = (dh/2 - dh + 1) - ((l.top - l.bottom + 1)/2 - l.top);
// Ensure borders are adequate
bm.minborder(2);
cbm->minborder(2-xd2c);
cbm->minborder(2+dw+xd2c-cw);
// Initialize row pointers
const int dy = dh - 1;
const int cy = dy + yd2c;
#ifndef NDEBUG
bm.check_border();
cbm->check_border();
#endif
code_bitmap_by_cross_coding (bm,*cbm, xd2c, dw, dy, cy, bm[dy+1], bm[dy],
(*cbm)[cy+1] + xd2c, (*cbm)[cy ] + xd2c, (*cbm)[cy-1] + xd2c);
}
void
JB2Dict::JB2Codec::code_bitmap_directly (GBitmap &bm)
{
// Make sure bitmap will not be disturbed
GMonitorLock lock(bm.monitor());
// ensure borders are adequate
bm.minborder(3);
// initialize row pointers
int dy = bm.rows() - 1;
code_bitmap_directly(bm,bm.columns(),dy,bm[dy+2],bm[dy+1],bm[dy]);
}
void
JB2Dict::JB2Codec::LibRect::compute_bounding_box(const GBitmap &bm)
{
// First lock the stuff.
GMonitorLock lock(bm.monitor());
// Get size
const int w = bm.columns();
const int h = bm.rows();
const int s = bm.rowsize();
// Right border
for(right=w-1;right >= 0;--right)
{
unsigned char const *p = bm[0] + right;
unsigned char const * const pe = p+(s*h);
for (;(p<pe)&&(!*p);p+=s)
continue;
if (p<pe)
break;
}
// Top border
for(top=h-1;top >= 0;--top)
{
unsigned char const *p = bm[top];
unsigned char const * const pe = p+w;
for (;(p<pe)&&(!*p); ++p)
continue;
if (p<pe)
break;
}
// Left border
for (left=0;left <= right;++left)
{
unsigned char const *p = bm[0] + left;
unsigned char const * const pe=p+(s*h);
for (;(p<pe)&&(!*p);p+=s)
continue;
if (p<pe)
break;
}
// Bottom border
for(bottom=0;bottom <= top;++bottom)
{
unsigned char const *p = bm[bottom];
unsigned char const * const pe = p+w;
for (;(p<pe)&&(!*p); ++p)
continue;
if (p<pe)
break;
}
}
void
GBitmap::init(const GBitmap &ref, int aborder)
{
GMonitorLock lock(monitor());
if (this != &ref)
{
GMonitorLock lock(ref.monitor());
init(ref.nrows, ref.ncolumns, aborder);
grays = ref.grays;
unsigned char *row = bytes_data+border;
for (int n=0; n<nrows; n++, row+=bytes_per_row)
memcpy( (void*)row, (void*)ref[n], ncolumns );
}
else if (aborder > border)
{
minborder(aborder);
}
}
void
GBitmap::init(const GBitmap &ref, const GRect &rect, int border)
{
GMonitorLock lock(monitor());
// test bitmap physical equality
if (this == &ref)
{
GBitmap tmp;
tmp.grays = grays;
tmp.border = border;
tmp.bytes_per_row = bytes_per_row;
tmp.ncolumns = ncolumns;
tmp.nrows = nrows;
tmp.bytes = bytes;
tmp.gbytes_data.swap(gbytes_data);
tmp.grle.swap(grle);
bytes = 0 ;
init(tmp, rect, border);
}
else
{
GMonitorLock lock(ref.monitor());
// create empty bitmap
init(rect.height(), rect.width(), border);
grays = ref.grays;
// compute destination rectangle
GRect rect2(0, 0, ref.columns(), ref.rows() );
rect2.intersect(rect2, rect);
rect2.translate(-rect.xmin, -rect.ymin);
// copy bits
if (! rect2.isempty())
{
for (int y=rect2.ymin; y<rect2.ymax; y++)
{
unsigned char *dst = (*this)[y];
const unsigned char *src = ref[y+rect.ymin] + rect.xmin;
for (int x=rect2.xmin; x<rect2.xmax; x++)
dst[x] = src[x];
}
}
}
}
