bool wxPNMHandler::DoCanRead( wxInputStream& stream )
{
Skip_Comment(stream);
if ( stream.GetC() == 'P' )
{
switch (stream.GetC())
{
case '3':
case '6':
return true;
}
}
return false;
}
bool wxPNMHandler::DoCanRead( wxInputStream& stream )
{
Skip_Comment(stream);
// it's ok to modify the stream position here
if ( stream.GetC() == 'P' )
{
switch ( stream.GetC() )
{
case '2': // ASCII Grey
case '3': // ASCII RGB
case '5': // RAW Grey
case '6': // RAW RGB
return true;
}
}
return false;
}
wxString IACFile::ReadToken(wxInputStream &file) {
// 0 = read chars until digit
// 1 = read digits until no digit
// 2 = token found
wxString token = wxEmptyString;
int mode = 0;
while (file.IsOk() && mode != 2) {
int c = file.GetC();
if (c != wxEOF && c <= 128) {
if (c == '\n' && m_tokensI > 0) {
m_newlineTokens.push_back(m_tokensI + 1);
}
m_RawData.Append((char)c);
switch (mode) {
case 0:
if (isdigit(c)) {
token.Append((char)c);
mode = 1;
}
break;
case 1:
if (isdigit(c) || c == '/') {
token.Append((char)c);
} else {
if (token.Len() == 5) {
// token found!!
mode = 2;
} else {
token.Empty();
}
}
break;
/* this is dead code
case 2:
mode = 0;
break;
*/
} // case
}
} // while
if (mode != 2) {
token.Empty();
}
return token;
}
static void SkipWhitespace(wxInputStream& input, unsigned int& lineNumber)
{
char c;
while (!input.Eof())
{
c = input.Peek();
if (c == '\n')
{
++lineNumber;
}
else if (c == '-')
{
input.GetC();
char c2 = input.Peek();
if (c2 == '-')
{
// Lua single line comment.
while (!input.Eof() && input.GetC() != '\n')
{
}
++lineNumber;
continue;
}
}
else if (c == '/')
{
input.GetC();
char c2 = input.Peek();
if (c2 == '*')
{
// C++ block comment.
input.GetC();
while (!input.Eof())
{
c = input.GetC();
if (c == '\n')
{
++lineNumber;
}
if (c == '*' && input.Peek() == '/')
{
input.GetC();
break;
}
}
continue;
}
else if (c2 == '/')
{
// C++ single line comment.
while (!input.Eof() && input.GetC() != '\n')
{
}
++lineNumber;
continue;
}
else
{
input.Ungetch(c);
break;
}
}
if (!IsSpace(c))
{
break;
}
input.GetC();
}
}
bool GetToken(wxInputStream& input, wxString& result, unsigned int& lineNumber)
{
result.Empty();
SkipWhitespace(input, lineNumber);
// Reached the end of the file.
if (input.Eof())
{
return false;
}
char c = input.GetC();
if (c == '\"')
{
// Quoted string, search for the end quote.
do
{
result += c;
c = input.GetC();
}
while (input.IsOk() && c != '\"');
result += c;
return true;
}
char n = input.Peek();
if (IsDigit(c) || (c == '.' && IsDigit(n)) || (c == '-' && IsDigit(n)))
{
bool hasDecimal = false;
while (!IsSpace(c))
{
result.Append(c);
if (input.Eof())
{
return true;
}
c = input.Peek();
if (!IsDigit(c) && c != '.')
{
return true;
}
input.GetC();
if (c == '\n')
{
++lineNumber;
return true;
}
}
}
else
{
if (IsSymbol(c))
{
result = c;
return true;
}
while (!IsSpace(c) && !input.Eof())
{
result.Append(c);
if (IsSymbol(input.Peek()))
{
break;
}
c = input.GetC();
if (c == '\n')
{
++lineNumber;
return true;
}
}
}
return true;
}
bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
int bpp, int ncolors, int comp,
wxFileOffset bmpOffset, wxInputStream& stream,
bool verbose, bool IsBmp, bool hasPalette)
{
wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0, amask = 0;
int rshift = 0, gshift = 0, bshift = 0, ashift = 0;
int rbits = 0, gbits = 0, bbits = 0;
wxInt32 dbuf[4];
wxInt8 bbuf[4];
wxUint8 aByte;
wxUint16 aWord;
// allocate space for palette if needed:
BMPPalette *cmap;
if ( bpp < 16 )
{
cmap = new BMPPalette[ncolors];
if ( !cmap )
{
if (verbose)
{
wxLogError(_("BMP: Couldn't allocate memory."));
}
return false;
}
}
else // no palette
{
cmap = NULL;
}
wxON_BLOCK_EXIT1(&BMPPalette::Free, cmap);
// destroy existing here instead of:
image->Destroy();
image->Create(width, height);
unsigned char *ptr = image->GetData();
if ( !ptr )
{
if ( verbose )
{
wxLogError( _("BMP: Couldn't allocate memory.") );
}
return false;
}
unsigned char *alpha;
if ( bpp == 32 )
{
// tell the image to allocate an alpha buffer
image->SetAlpha();
alpha = image->GetAlpha();
if ( !alpha )
{
if ( verbose )
{
wxLogError(_("BMP: Couldn't allocate memory."));
}
return false;
}
}
else // no alpha
{
alpha = NULL;
}
// Reading the palette, if it exists:
if ( bpp < 16 && ncolors != 0 )
{
unsigned char* r = new unsigned char[ncolors];
unsigned char* g = new unsigned char[ncolors];
unsigned char* b = new unsigned char[ncolors];
for (int j = 0; j < ncolors; j++)
{
if (hasPalette)
{
stream.Read(bbuf, 4);
cmap[j].b = bbuf[0];
cmap[j].g = bbuf[1];
cmap[j].r = bbuf[2];
r[j] = cmap[j].r;
g[j] = cmap[j].g;
b[j] = cmap[j].b;
}
else
{
//used in reading .ico file mask
r[j] = cmap[j].r =
g[j] = cmap[j].g =
b[j] = cmap[j].b = ( j ? 255 : 0 );
}
}
#if wxUSE_PALETTE
// Set the palette for the wxImage
image->SetPalette(wxPalette(ncolors, r, g, b));
#endif // wxUSE_PALETTE
delete[] r;
delete[] g;
delete[] b;
}
else if ( bpp == 16 || bpp == 32 )
{
if ( comp == BI_BITFIELDS )
{
int bit;
stream.Read(dbuf, 4 * 3);
rmask = wxINT32_SWAP_ON_BE(dbuf[0]);
gmask = wxINT32_SWAP_ON_BE(dbuf[1]);
bmask = wxINT32_SWAP_ON_BE(dbuf[2]);
// find shift amount (Least significant bit of mask)
for (bit = bpp-1; bit>=0; bit--)
{
if (bmask & (1 << bit))
bshift = bit;
if (gmask & (1 << bit))
gshift = bit;
if (rmask & (1 << bit))
rshift = bit;
}
// Find number of bits in mask (MSB-LSB+1)
for (bit = 0; bit < bpp; bit++)
{
if (bmask & (1 << bit))
bbits = bit-bshift+1;
if (gmask & (1 << bit))
gbits = bit-gshift+1;
if (rmask & (1 << bit))
rbits = bit-rshift+1;
}
}
else if ( bpp == 16 )
{
rmask = 0x7C00;
gmask = 0x03E0;
bmask = 0x001F;
rshift = 10;
gshift = 5;
bshift = 0;
rbits = 5;
gbits = 5;
bbits = 5;
}
else if ( bpp == 32 )
{
rmask = 0x00FF0000;
gmask = 0x0000FF00;
bmask = 0x000000FF;
amask = 0xFF000000;
ashift = 24;
rshift = 16;
gshift = 8;
bshift = 0;
rbits = 8;
gbits = 8;
bbits = 8;
}
}
/*
* Reading the image data
*/
if ( IsBmp )
{
// NOTE: seeking a positive amount in wxFromCurrent mode allows us to
// load even non-seekable streams (see wxInputStream::SeekI docs)!
const wxFileOffset pos = stream.TellI();
if (pos != wxInvalidOffset && bmpOffset > pos)
if (stream.SeekI(bmpOffset - pos, wxFromCurrent) == wxInvalidOffset)
return false;
//else: icon, just carry on
}
unsigned char *data = ptr;
/* set the whole image to the background color */
if ( bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8) )
{
for (int i = 0; i < width * height; i++)
{
*ptr++ = cmap[0].r;
*ptr++ = cmap[0].g;
*ptr++ = cmap[0].b;
}
ptr = data;
}
int linesize = ((width * bpp + 31) / 32) * 4;
/* BMPs are stored upside down */
for ( int line = (height - 1); line >= 0; line-- )
{
int linepos = 0;
for ( int column = 0; column < width ; )
{
if ( bpp < 16 )
{
linepos++;
aByte = stream.GetC();
if ( bpp == 1 )
{
for (int bit = 0; bit < 8 && column < width; bit++)
{
int index = ((aByte & (0x80 >> bit)) ? 1 : 0);
ptr[poffset] = cmap[index].r;
ptr[poffset + 1] = cmap[index].g;
ptr[poffset + 2] = cmap[index].b;
column++;
}
}
else if ( bpp == 4 )
{
if ( comp == BI_RLE4 )
{
wxUint8 first;
first = aByte;
aByte = stream.GetC();
if ( first == 0 )
{
if ( aByte == 0 )
{
if ( column > 0 )
column = width;
}
else if ( aByte == 1 )
{
column = width;
line = -1;
}
else if ( aByte == 2 )
{
aByte = stream.GetC();
column += aByte;
linepos = column * bpp / 4;
aByte = stream.GetC();
line -= aByte; // upside down
}
else
{
int absolute = aByte;
wxUint8 nibble[2] ;
int readBytes = 0 ;
for (int k = 0; k < absolute; k++)
{
if ( !(k % 2 ) )
{
++readBytes ;
aByte = stream.GetC();
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
}
ptr[poffset ] = cmap[nibble[k%2]].r;
ptr[poffset + 1] = cmap[nibble[k%2]].g;
ptr[poffset + 2] = cmap[nibble[k%2]].b;
column++;
if ( k % 2 )
linepos++;
}
if ( readBytes & 0x01 )
aByte = stream.GetC();
}
}
else
{
wxUint8 nibble[2] ;
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
for ( int l = 0; l < first && column < width; l++ )
{
ptr[poffset ] = cmap[nibble[l%2]].r;
ptr[poffset + 1] = cmap[nibble[l%2]].g;
ptr[poffset + 2] = cmap[nibble[l%2]].b;
column++;
if ( l % 2 )
linepos++;
}
}
}