LibGfx: Store profile id MD5 in ICCProfile

2 files changed, 21 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGfx/ICCProfile.cpp b/Userland/Libraries/LibGfx/ICCProfile.cpp
index 72492006af..e8a4098563 100644
--- a/Userland/Libraries/LibGfx/ICCProfile.cpp
+++ b/Userland/Libraries/LibGfx/ICCProfile.cpp
@@ -233,6 +233,23 @@ ErrorOr<XYZ> parse_pcs_illuminant(ICCHeader const& header)
 
     return xyz;
 }
+
+Optional<Crypto::Hash::MD5::DigestType> parse_profile_id(ICCHeader const& header)
+{
+    // ICC v4, 7.2.18 Profile ID field
+    // "A profile ID field value of zero (00h) shall indicate that a profile ID has not been calculated."
+    bool did_calculate_profile_id = false;
+    for (u8 b : header.profile_md5)
+        if (b != 0)
+            did_calculate_profile_id = true;
+    if (!did_calculate_profile_id)
+        return {};
+
+    Crypto::Hash::MD5::DigestType md5;
+    static_assert(sizeof(md5.data) == sizeof(header.profile_md5));
+    memcpy(md5.data, header.profile_md5, sizeof(md5.data));
+    return md5;
+}
 }
 
 StringView device_class_name(DeviceClass device_class)
@@ -364,6 +381,7 @@ ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(R
     profile->m_flags = Flags { header.profile_flags };
     profile->m_rendering_intent = TRY(parse_rendering_intent(header));
     profile->m_pcs_illuminant = TRY(parse_pcs_illuminant(header));
+    profile->m_id = parse_profile_id(header);
 
     return profile;
 }
diff --git a/Userland/Libraries/LibGfx/ICCProfile.h b/Userland/Libraries/LibGfx/ICCProfile.h
index d60601a779..65bcf61434 100644
--- a/Userland/Libraries/LibGfx/ICCProfile.h
+++ b/Userland/Libraries/LibGfx/ICCProfile.h
@@ -11,6 +11,7 @@
 #include <AK/NonnullRefPtr.h>
 #include <AK/RefCounted.h>
 #include <AK/Span.h>
+#include <LibCrypto/Hash/MD5.h>
 
 namespace Gfx::ICC {
 
@@ -136,6 +137,7 @@ public:
     Flags flags() const { return m_flags; }
     RenderingIntent rendering_intent() const { return m_rendering_intent; }
     const XYZ& pcs_illuminant() const { return m_pcs_illuminant; }
+    Optional<Crypto::Hash::MD5::DigestType> const& id() const { return m_id; }
 
 private:
     Version m_version;
@@ -146,6 +148,7 @@ private:
     Flags m_flags;
     RenderingIntent m_rendering_intent;
     XYZ m_pcs_illuminant;
+    Optional<Crypto::Hash::MD5::DigestType> m_id;
 };
 
 }