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LibGfx: Make validate_before_create() create a regular bool

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This is for validating that a decoder with a weak or nonexistent
sniff() method thinks it can decode an image. This should not be
treated as an error.

No behavior change.
This commit is contained in:
Nico Weber 2024-03-07 20:34:36 -05:00 • committed by Andreas Kling
parent 69e4f924b7
commit 6607757b08
4 changed files with 12 additions and 10 deletions
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8
Tests/LibGfx/TestImageDecoder.cpp
View file

@ -557,7 +557,7 @@ TEST_CASE(test_ppm)
TEST_CASE(test_targa_bottom_left)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tga/buggie-bottom-left-uncompressed.tga"sv)));
EXPECT(TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes())));
EXPECT(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::create(file->bytes()));
TRY_OR_FAIL(expect_single_frame(*plugin_decoder));
@ -566,7 +566,7 @@ TEST_CASE(test_targa_bottom_left)
TEST_CASE(test_targa_top_left)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tga/buggie-top-left-uncompressed.tga"sv)));
EXPECT(TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes())));
EXPECT(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::create(file->bytes()));
TRY_OR_FAIL(expect_single_frame(*plugin_decoder));
@ -575,7 +575,7 @@ TEST_CASE(test_targa_top_left)
TEST_CASE(test_targa_bottom_left_compressed)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tga/buggie-bottom-left-compressed.tga"sv)));
EXPECT(TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes())));
EXPECT(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::create(file->bytes()));
TRY_OR_FAIL(expect_single_frame(*plugin_decoder));
@ -584,7 +584,7 @@ TEST_CASE(test_targa_bottom_left_compressed)
TEST_CASE(test_targa_top_left_compressed)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tga/buggie-top-left-compressed.tga"sv)));
EXPECT(TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes())));
EXPECT(Gfx::TGAImageDecoderPlugin::validate_before_create(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TGAImageDecoderPlugin::create(file->bytes()));
TRY_OR_FAIL(expect_single_frame(*plugin_decoder));

4
Userland/Libraries/LibGfx/ImageFormats/ImageDecoder.cpp
View file

@ -64,7 +64,7 @@ static ErrorOr<OwnPtr<ImageDecoderPlugin>> probe_and_sniff_for_appropriate_plugi
static OwnPtr<ImageDecoderPlugin> probe_and_sniff_for_appropriate_plugin_with_known_mime_type(StringView mime_type, ReadonlyBytes bytes)
{
struct ImagePluginWithMIMETypeInitializer {
ErrorOr<bool> (*validate_before_create)(ReadonlyBytes) = nullptr;
bool (*validate_before_create)(ReadonlyBytes) = nullptr;
ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> (*create)(ReadonlyBytes) = nullptr;
StringView mime_type;
};
@ -76,7 +76,7 @@ static OwnPtr<ImageDecoderPlugin> probe_and_sniff_for_appropriate_plugin_with_kn
for (auto& plugin : s_initializers_with_mime_type) {
if (plugin.mime_type != mime_type)
continue;
auto validation_result = plugin.validate_before_create(bytes).release_value_but_fixme_should_propagate_errors();
auto validation_result = plugin.validate_before_create(bytes);
if (!validation_result)
continue;
auto plugin_decoder = plugin.create(bytes);

8
Userland/Libraries/LibGfx/ImageFormats/TGALoader.cpp
View file

@ -91,11 +91,13 @@ ErrorOr<void> TGAImageDecoderPlugin::decode_tga_header()
return {};
}
ErrorOr<bool> TGAImageDecoderPlugin::validate_before_create(ReadonlyBytes data)
bool TGAImageDecoderPlugin::validate_before_create(ReadonlyBytes data)
{
FixedMemoryStream stream { data };
auto header = TRY(stream.read_value<Gfx::TGAHeader>());
return !ensure_header_validity(header, data.size()).is_error();
auto header_or_err = stream.read_value<Gfx::TGAHeader>();
if (header_or_err.is_error())
return false;
return !ensure_header_validity(header_or_err.release_value(), data.size()).is_error();
}
ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> TGAImageDecoderPlugin::create(ReadonlyBytes data)

2
Userland/Libraries/LibGfx/ImageFormats/TGALoader.h
View file

@ -14,7 +14,7 @@ struct TGALoadingContext;
class TGAImageDecoderPlugin final : public ImageDecoderPlugin {
public:
static ErrorOr<bool> validate_before_create(ReadonlyBytes);
static bool validate_before_create(ReadonlyBytes);
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
virtual ~TGAImageDecoderPlugin() override;