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LibGfx: Propagate errors from serializing bitmaps

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We essentially just end up moving `release_value_but_fixme_...` one
layer down, but it makes adding more fallible operations in the
serialization function more comfortable.
This commit is contained in:
Tim Schumacher 2023-02-08 18:21:41 +01:00 • committed by Linus Groh
parent 81863eaf57
commit 6ea3c1659a
4 changed files with 8 additions and 9 deletions
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11
Userland/Libraries/LibGfx/Bitmap.cpp
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@ -256,10 +256,9 @@ ErrorOr<NonnullRefPtr<Bitmap>> Bitmap::create_from_serialized_bytes(ReadonlyByte
return bitmap;
}
ByteBuffer Bitmap::serialize_to_byte_buffer() const
ErrorOr<ByteBuffer> Bitmap::serialize_to_byte_buffer() const
{
// FIXME: Somehow handle possible OOM situation here.
auto buffer = ByteBuffer::create_uninitialized(sizeof(size_t) + 4 * sizeof(unsigned) + sizeof(BitmapFormat) + sizeof(ARGB32) * palette_size(m_format) + size_in_bytes()).release_value_but_fixme_should_propagate_errors();
auto buffer = TRY(ByteBuffer::create_uninitialized(sizeof(size_t) + 4 * sizeof(unsigned) + sizeof(BitmapFormat) + sizeof(ARGB32) * palette_size(m_format) + size_in_bytes()));
DeprecatedOutputMemoryStream stream { buffer };
auto write = [&]<typename T>(T value) {
@ -271,17 +270,17 @@ ByteBuffer Bitmap::serialize_to_byte_buffer() const
auto palette = palette_to_vector();
if (!write(size_in_bytes()) || !write((unsigned)size().width()) || !write((unsigned)size().height()) || !write((unsigned)scale()) || !write(m_format) || !write((unsigned)palette.size()))
return {};
return Error::from_string_literal("Failed to write serialized image metadata to the buffer");
for (auto& p : palette) {
if (!write(p))
return {};
return Error::from_string_literal("Failed to write serialized palette to the buffer");
}
auto size = size_in_bytes();
VERIFY(stream.remaining() == size);
if (stream.write({ scanline(0), size }) != size)
return {};
return Error::from_string_literal("Failed to write serialized image data to the buffer");
return buffer;
}