#define poffset (line * width * 3 + column * 3)
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream )
+bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSED(verbose) )
{
int rshift = 0, gshift = 0, bshift = 0;
wxUint8 aByte;
wxUint16 aWord;
- wxInt32 dbuf[4], aDword,
+ wxInt32 dbuf[4], aDword,
rmask = 0, gmask = 0, bmask = 0;
wxInt8 bbuf[4];
struct _cmap {
unsigned char r, g, b;
} *cmap = NULL;
-
+
off_t start_offset = stream.TellI();
image->Destroy();
stream.Read( &bbuf, 2 );
stream.Read( dbuf, 4 * 4 );
+#if 0 // unused
wxInt32 size = wxINT32_SWAP_ON_BE( dbuf[0] );
+#endif
wxInt32 offset = wxINT32_SWAP_ON_BE( dbuf[2] );
stream.Read(dbuf, 4 * 2);
int height = (int)wxINT32_SWAP_ON_BE( dbuf[1] );
if (width > 32767)
{
- wxLogError( _T("Image width > 32767 pixels for file.") );
+ wxLogError( wxT("Image width > 32767 pixels for file.") );
return FALSE;
}
if (height > 32767)
{
- wxLogError( _T("Image height > 32767 pixels for file.") );
+ wxLogError( wxT("Image height > 32767 pixels for file.") );
return FALSE;
}
-
+
stream.Read( &aWord, 2 );
/*
TODO
int bpp = (int)wxUINT16_SWAP_ON_BE( aWord );
if (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32)
{
- wxLogError( _T("unknown bitdepth in file.") );
+ wxLogError( wxT("unknown bitdepth in file.") );
return FALSE;
}
-
+
stream.Read( dbuf, 4 * 4 );
int comp = (int)wxINT32_SWAP_ON_BE( dbuf[0] );
if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS)
{
- wxLogError( _T("unknown encoding in Windows BMP file.") );
+ wxLogError( wxT("unknown encoding in Windows BMP file.") );
return FALSE;
}
-
+
stream.Read( dbuf, 4 * 2 );
int ncolors = (int)wxINT32_SWAP_ON_BE( dbuf[0] );
if (ncolors == 0)
ncolors = 1 << bpp;
/* some more sanity checks */
- if (((comp == BI_RLE4) && (bpp != 4)) ||
- ((comp == BI_RLE8) && (bpp != 8)) ||
- ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
+ if (((comp == BI_RLE4) && (bpp != 4)) ||
+ ((comp == BI_RLE8) && (bpp != 8)) ||
+ ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
{
- wxLogError( _T("encoding of BMP doesn't match bitdepth.") );
+ wxLogError( wxT("encoding of BMP doesn't match bitdepth.") );
return FALSE;
}
if (bpp < 16)
cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
if (!cmap)
{
- wxLogError( _T("Cannot allocate RAM for color map in BMP file.") );
+ wxLogError( wxT("Cannot allocate RAM for color map in BMP file.") );
return FALSE;
}
}
unsigned char *ptr = image->GetData();
if (!ptr)
{
- wxLogError( _T("Cannot allocate RAM for RGB data in file.") );
+ wxLogError( wxT("Cannot allocate RAM for RGB data in file.") );
if (cmap)
free(cmap);
return FALSE;
}
ptr = data;
}
-
+
int line = 0;
int column = 0;
int linesize = ((width * bpp + 31) / 32) * 4;
/* BMPs are stored upside down */
- for (line = (height - 1); line >= 0; line--)
+ for (line = (height - 1); line >= 0; line--)
{
int linepos = 0;
for (column = 0; column < width;)
{
if (comp == BI_RLE4)
{
- wxLogError( _T("Can't deal with 4bit encoded yet.") );
+ wxLogError( wxT("Can't deal with 4bit encoded yet.") );
image->Destroy();
free(cmap);
return FALSE;
{
unsigned char temp;
stream.Read( &aWord, 2 );
- aWord = wxUINT16_SWAP_ON_BE( aWord );
+ aWord = wxUINT16_SWAP_ON_BE( aWord );
linepos += 2;
temp = (aWord & rmask) >> rshift;
ptr[poffset] = temp;
temp = (aWord & gmask) >> gshift;
ptr[poffset + 1] = temp;
- temp = (aWord & bmask) >> gshift;
+ temp = (aWord & bmask) >> bshift;
ptr[poffset + 2] = temp;
column++;
}
{
unsigned char temp;
stream.Read( &aDword, 4 );
- aDword = wxINT32_SWAP_ON_BE( aDword );
+ aDword = wxINT32_SWAP_ON_BE( aDword );
linepos += 4;
temp = (aDword & rmask) >> rshift;
ptr[poffset] = temp;
break;
}
}
- if (cmap)
+ if (cmap)
free(cmap);
image->SetMask( FALSE );
return TRUE;
}
+bool wxBMPHandler::DoCanRead( wxInputStream& stream )
+{
+ unsigned char hdr[2];
+
+ stream.Read(&hdr, 2);
+ stream.SeekI(-2, wxFromCurrent);
+ return (hdr[0] == 'B' && hdr[1] == 'M');
+}
+
#endif // wxUSE_STREAMS