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LibGfx: Port ICOLoader to the new AK::Stream

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This commit is contained in:
Karol Kosek 2023-01-25 22:36:59 +01:00 • committed by Andrew Kaster
parent 492d5d7cb2
commit e7cc426e05
1 changed files with 30 additions and 18 deletions
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48
Userland/Libraries/LibGfx/ICOLoader.cpp
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@ -6,7 +6,7 @@
#include <AK/ByteBuffer.h>
#include <AK/Debug.h>
#include <AK/DeprecatedMemoryStream.h>
#include <AK/MemoryStream.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/Types.h>
#include <LibGfx/BMPLoader.h>
@ -36,6 +36,22 @@ struct ICONDIRENTRY {
};
static_assert(AssertSize<ICONDIRENTRY, 16>());
};
template<>
class AK::Traits<Gfx::ICONDIR> : public GenericTraits<Gfx::ICONDIR> {
public:
static constexpr bool is_trivially_serializable() { return true; }
};
template<>
class AK::Traits<Gfx::ICONDIRENTRY> : public GenericTraits<Gfx::ICONDIRENTRY> {
public:
static constexpr bool is_trivially_serializable() { return true; }
};
namespace Gfx {
struct ICOImageDescriptor {
u16 width;
u16 height;
@ -59,23 +75,17 @@ struct ICOLoadingContext {
size_t largest_index;
};
static ErrorOr<size_t> decode_ico_header(DeprecatedInputMemoryStream& stream)
static ErrorOr<size_t> decode_ico_header(AK::Stream& stream)
{
ICONDIR header;
stream >> Bytes { &header, sizeof(header) };
TRY(stream.try_handle_any_error());
auto header = TRY(stream.read_value<ICONDIR>());
if (header.must_be_0 != 0 || header.must_be_1 != 1)
return Error::from_string_literal("Invalid ICO header");
return { header.image_count };
}
static ErrorOr<ICOImageDescriptor> decode_ico_direntry(DeprecatedInputMemoryStream& stream)
static ErrorOr<ICOImageDescriptor> decode_ico_direntry(AK::Stream& stream)
{
ICONDIRENTRY entry;
stream >> Bytes { &entry, sizeof(entry) };
TRY(stream.try_handle_any_error());
auto entry = TRY(stream.read_value<ICONDIRENTRY>());
ICOImageDescriptor desc = { entry.width, entry.height, entry.bits_per_pixel, entry.offset, entry.size, nullptr };
if (desc.width == 0)
desc.width = 256;
@ -106,14 +116,14 @@ static size_t find_largest_image(ICOLoadingContext const& context)
static ErrorOr<void> load_ico_directory(ICOLoadingContext& context)
{
DeprecatedInputMemoryStream stream { { context.data, context.data_size } };
auto stream = TRY(FixedMemoryStream::construct({ context.data, context.data_size }));
auto image_count = TRY(decode_ico_header(stream));
auto image_count = TRY(decode_ico_header(*stream));
if (image_count == 0)
return Error::from_string_literal("ICO file has no images");
for (size_t i = 0; i < image_count; ++i) {
auto desc = TRY(decode_ico_direntry(stream));
auto desc = TRY(decode_ico_direntry(*stream));
if (desc.offset + desc.size < desc.offset // detect integer overflow
|| (desc.offset + desc.size) > context.data_size) {
dbgln_if(ICO_DEBUG, "load_ico_directory: offset: {} size: {} doesn't fit in ICO size: {}", desc.offset, desc.size, context.data_size);
@ -173,8 +183,8 @@ ErrorOr<void> ICOImageDecoderPlugin::load_ico_bitmap(ICOLoadingContext& context,
ErrorOr<bool> ICOImageDecoderPlugin::sniff(ReadonlyBytes data)
{
DeprecatedInputMemoryStream stream { { data.data(), data.size() } };
return !decode_ico_header(stream).is_error();
auto stream = TRY(FixedMemoryStream::construct(data));
return !decode_ico_header(*stream).is_error();
}
ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> ICOImageDecoderPlugin::create(ReadonlyBytes data)
@ -223,8 +233,10 @@ bool ICOImageDecoderPlugin::set_nonvolatile(bool& was_purged)
bool ICOImageDecoderPlugin::initialize()
{
DeprecatedInputMemoryStream stream { { m_context->data, m_context->data_size } };
return !decode_ico_header(stream).is_error();
auto stream_or_error = FixedMemoryStream::construct(ReadonlyBytes { m_context->data, m_context->data_size });
if (stream_or_error.is_error())
return false;
return !decode_ico_header(*stream_or_error.value()).is_error();
}
bool ICOImageDecoderPlugin::is_animated()