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LibPDF: Avoid an unnecessary copy in Filter::decode_ascii85()

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This commit is contained in:
Lucas CHOLLET 2023-11-11 17:38:15 -05:00 • committed by Andreas Kling
parent e80d3ff518
commit dac703a0b8
1 changed files with 6 additions and 6 deletions
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12
Userland/Libraries/LibPDF/Filter.cpp
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@ -93,8 +93,8 @@ PDFErrorOr<ByteBuffer> Filter::decode_ascii_hex(ReadonlyBytes bytes)
PDFErrorOr<ByteBuffer> Filter::decode_ascii85(ReadonlyBytes bytes)
{
Vector<u8> buff;
buff.ensure_capacity(bytes.size());
ByteBuffer buffer;
TRY(buffer.try_ensure_capacity(bytes.size()));
size_t byte_index = 0;
@ -107,7 +107,7 @@ PDFErrorOr<ByteBuffer> Filter::decode_ascii85(ReadonlyBytes bytes)
if (bytes[byte_index] == 'z') {
byte_index++;
for (int i = 0; i < 4; i++)
buff.append(0);
buffer.append(0);
continue;
}
@ -125,7 +125,7 @@ PDFErrorOr<ByteBuffer> Filter::decode_ascii85(ReadonlyBytes bytes)
}
for (size_t i = 0; i < to_write - 1; i++)
buff.append(reinterpret_cast<u8*>(&number)[3 - i]);
buffer.append(reinterpret_cast<u8*>(&number)[3 - i]);
break;
} else {
@ -140,10 +140,10 @@ PDFErrorOr<ByteBuffer> Filter::decode_ascii85(ReadonlyBytes bytes)
}
for (int i = 0; i < 4; i++)
buff.append(reinterpret_cast<u8*>(&number)[3 - i]);
buffer.append(reinterpret_cast<u8*>(&number)[3 - i]);
}
return TRY(ByteBuffer::copy(buff.span()));
return buffer;
}
PDFErrorOr<ByteBuffer> Filter::decode_png_prediction(Bytes bytes, int bytes_per_row)