bool LLImageDimensionsInfo::getImageDimensionsBmp()
{
// Make sure the file is long enough.
const S32 DATA_LEN = 26; // BMP header (14) + DIB header size (4) + width (4) + height (4)
if (!checkFileLength(DATA_LEN))
{
LL_WARNS() << "Premature end of file" << LL_ENDL;
return false;
}
// Read BMP signature.
U8 signature[2];
mInfile.read((void*)signature, sizeof(signature)/sizeof(signature[0]));
// Make sure this is actually a BMP file.
// We only support Windows bitmaps (BM), according to LLImageBMP::updateData().
if (signature[0] != 'B' || signature[1] != 'M')
{
LL_WARNS() << "Not a BMP" << LL_ENDL;
return false;
}
// Read image dimensions.
mInfile.seek(APR_CUR, 16);
mWidth = read_reverse_s32();
mHeight = read_reverse_s32();
return true;
}
bool LLImageDimensionsInfo::getImageDimensionsBmp()
{
const S32 BMP_FILE_HEADER_SIZE = 14;
mInfile.seek(APR_CUR,BMP_FILE_HEADER_SIZE+4);
mWidth = read_reverse_s32();
mHeight = read_reverse_s32();
return true;
}
