unsigned int bytesperline; // bytes per line (each plane)
int nplanes = 3; // number of planes
int format = wxPCX_24BIT; // image format (8 bit, 24 bit)
- wxHashTable h(wxKEY_INTEGER); // image histogram
+ wxImageHistogram histogram; // image histogram
unsigned long key; // key in the hashtable
unsigned int i;
if (image->CountColours(256) <= 256)
{
- image->ComputeHistogram(h);
+ image->ComputeHistogram(histogram);
format = wxPCX_8BIT;
nplanes = 1;
}
case wxPCX_8BIT:
{
unsigned char r, g, b;
- wxHNode *hnode;
for (i = 0; i < width; i++)
{
b = *(src++);
key = (r << 16) | (g << 8) | b;
- hnode = (wxHNode *) h.Get(key);
- p[i] = (unsigned char)hnode->index;
+ p[i] = (unsigned char)histogram[key].index;
}
break;
}
free(p);
- // For 8 bit images, build the palette and write it to the stream
-
+ // For 8 bit images, build the palette and write it to the stream:
if (format == wxPCX_8BIT)
{
- wxNode *node;
- wxHNode *hnode;
-
// zero unused colours
memset(pal, 0, sizeof(pal));
- h.BeginFind();
- while ((node = h.Next()) != NULL)
+ unsigned long index;
+
+ for (wxImageHistogram::iterator entry = histogram.begin();
+ entry != histogram.end(); entry++ )
{
- key = node->GetKeyInteger();
- hnode = (wxHNode *) node->GetData();
-
- pal[3 * hnode->index] = (unsigned char)(key >> 16);
- pal[3 * hnode->index + 1] = (unsigned char)(key >> 8);
- pal[3 * hnode->index + 2] = (unsigned char)(key);
- delete hnode;
+ key = entry->first;
+ index = entry->second.index;
+ pal[3 * index] = (unsigned char)(key >> 16);
+ pal[3 * index + 1] = (unsigned char)(key >> 8);
+ pal[3 * index + 2] = (unsigned char)(key);
}
stream.PutC(12);
bool wxPCXHandler::DoCanRead( wxInputStream& stream )
{
- unsigned char c;
-
- c = stream.GetC();
- stream.SeekI(-1, wxFromCurrent);
+ unsigned char c = stream.GetC();
+ if ( !stream )
+ return FALSE;
// not very safe, but this is all we can get from PCX header :-(
- return (c == 10);
+ return c == 10;
}
#endif // wxUSE_STREAMS && wxUSE_PCX