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LibGfx+icc: Print profile flags

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These flags are always 0 in practice in all profiles I've seen so far,
but hey, probably nice to dump them anyways.
This commit is contained in:
Nico Weber 2022-12-31 13:50:52 -05:00 committed by Andreas Kling
parent 88d5fd4b73
commit 0b46e572b5
Notes: sideshowbarker 2024-07-17 06:35:23 +09:00 
Author: https://github.com/nico
Commit: https://github.com/SerenityOS/serenity/commit/0b46e572b5
Pull-request: https://github.com/SerenityOS/serenity/pull/16751
3 changed files with 47 additions and 0 deletions
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7
Userland/Libraries/LibGfx/ICCProfile.cpp
View file

@ -284,6 +284,12 @@ StringView rendering_intent_name(RenderingIntent rendering_intent)
VERIFY_NOT_REACHED();
}
Flags::Flags() = default;
Flags::Flags(u32 bits)
: m_bits(bits)
{
}
ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(ReadonlyBytes bytes)
{
auto profile = adopt_ref(*new Profile());
@ -298,6 +304,7 @@ ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(R
profile->m_device_class = TRY(parse_device_class(header));
profile->m_data_color_space = TRY(parse_data_color_space(header));
profile->m_creation_timestamp = TRY(parse_creation_date_time(header));
profile->m_flags = Flags { header.profile_flags };
profile->m_rendering_intent = TRY(parse_rendering_intent(header));
return profile;

30
Userland/Libraries/LibGfx/ICCProfile.h
View file

@ -84,6 +84,34 @@ enum class RenderingIntent {
};
StringView rendering_intent_name(RenderingIntent);
// ICC v4, 7.2.11 Profile flags field
class Flags {
public:
Flags();
// "The profile flags field contains flags."
Flags(u32);
u32 bits() const { return m_bits; }
// "These can indicate various hints for the CMM such as distributed processing and caching options."
// "The least-significant 16 bits are reserved for the ICC."
u16 color_management_module_bits() const { return bits() >> 16; }
u16 icc_bits() const { return bits() & 0xff; }
// "Bit position 0: Embedded profile (0 if not embedded, 1 if embedded in file)"
bool is_embedded_in_file() const { return (icc_bits() & 1) != 0; }
// "Bit position 1: Profile cannot be used independently of the embedded colour data (set to 1 if true, 0 if false)"
// Double negation isn't unconfusing, so this function uses the inverted, positive sense.
bool can_be_used_independently_of_embedded_color_data() const { return (icc_bits() & 2) == 0; }
static constexpr u32 KnownBitsMask = 3;
private:
u32 m_bits = 0;
};
class Profile : public RefCounted<Profile> {
public:
static ErrorOr<NonnullRefPtr<Profile>> try_load_from_externally_owned_memory(ReadonlyBytes bytes);
@ -92,6 +120,7 @@ public:
DeviceClass device_class() const { return m_device_class; }
ColorSpace data_color_space() const { return m_data_color_space; }
time_t creation_timestamp() const { return m_creation_timestamp; }
Flags flags() const { return m_flags; }
RenderingIntent rendering_intent() const { return m_rendering_intent; }
private:
@ -99,6 +128,7 @@ private:
DeviceClass m_device_class;
ColorSpace m_data_color_space;
time_t m_creation_timestamp;
Flags m_flags;
RenderingIntent m_rendering_intent;
};

10
Userland/Utilities/icc.cpp
View file

@ -25,6 +25,16 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
outln("device class: {}", Gfx::ICC::device_class_name(profile->device_class()));
outln("data color space: {}", Gfx::ICC::color_space_name(profile->data_color_space()));
outln("creation date and time: {}", Core::DateTime::from_timestamp(profile->creation_timestamp()).to_deprecated_string());
auto flags = profile->flags();
outln("flags: 0x{:08x}", flags.bits());
outln(" embedded in file: {}", flags.is_embedded_in_file() ? "yes" : "no");
outln(" can be used independently of embedded color data: {}", flags.can_be_used_independently_of_embedded_color_data() ? "yes" : "no");
if (auto unknown_icc_bits = flags.icc_bits() & ~Gfx::ICC::Flags::KnownBitsMask)
outln(" other unknown ICC bits: 0x{:04x}", unknown_icc_bits);
if (auto color_management_module_bits = flags.color_management_module_bits())
outln(" CMM bits: 0x{:04x}", color_management_module_bits);
outln("rendering intent: {}", Gfx::ICC::rendering_intent_name(profile->rendering_intent()));
return 0;