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LibGfx: Make ImageDecoderPlugin::frame() return ErrorOr<>

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This is a first step towards better error propagation from image codecs.
This commit is contained in:
Andreas Kling 2021-11-20 14:29:33 +01:00
parent ae7656072a
commit 5a79c69b02
26 changed files with 101 additions and 100 deletions
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12
Userland/Libraries/LibGfx/PGMLoader.cpp
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@ -165,22 +165,22 @@ size_t PGMImageDecoderPlugin::frame_count()
return 1;
}
ImageFrameDescriptor PGMImageDecoderPlugin::frame(size_t i)
ErrorOr<ImageFrameDescriptor> PGMImageDecoderPlugin::frame(size_t index)
{
if (i > 0)
return {};
if (index > 0)
return Error::from_string_literal("PGMImageDecoderPlugin: Invalid frame index"sv);
if (m_context->state == PGMLoadingContext::State::Error)
return {};
return Error::from_string_literal("PGMImageDecoderPlugin: Decoding failed"sv);
if (m_context->state < PGMLoadingContext::State::Decoded) {
bool success = decode(*m_context);
if (!success)
return {};
return Error::from_string_literal("PGMImageDecoderPlugin: Decoding failed"sv);
}
VERIFY(m_context->bitmap);
return { m_context->bitmap, 0 };
return ImageFrameDescriptor { m_context->bitmap, 0 };
}
}