LibGfx+icc: Print primary platform

There's a small, old-timey list of platforms in the spec, but as far
as I can tell nobody is using additional platforms on Linux or Android
or what. So let's try going with an enum class instead of the FourCC
machinery for now.

Userland/Libraries/LibGfx/ICCProfile.cpp

@@ -99,7 +99,7 @@ struct ICCHeader {
     DateTimeNumber profile_creation_time;
 
     BigEndian<u32> profile_file_signature;
-    BigEndian<u32> primary_platform;
+    BigEndian<PrimaryPlatform> primary_platform;
 
     BigEndian<u32> profile_flags;
     BigEndian<u32> device_manufacturer;
@@ -226,6 +226,19 @@ ErrorOr<void> parse_file_signature(ICCHeader const& header)
     return {};
 }
 
+ErrorOr<PrimaryPlatform> parse_primary_platform(ICCHeader const& header)
+{
+    // ICC v4, 7.2.10 Primary platform field
+    switch (header.primary_platform) {
+    case PrimaryPlatform::Apple:
+    case PrimaryPlatform::Microsoft:
+    case PrimaryPlatform::SiliconGraphics:
+    case PrimaryPlatform::Sun:
+        return header.primary_platform;
+    }
+    return Error::from_string_literal("ICC::Profile: Invalid primary platform");
+}
+
 Optional<DeviceManufacturer> parse_device_manufacturer(ICCHeader const& header)
 {
     // ICC v4, 7.2.12 Device manufacturer field
@@ -439,6 +452,21 @@ StringView profile_connection_space_name(ColorSpace color_space)
     }
 }
 
+StringView primary_platform_name(PrimaryPlatform primary_platform)
+{
+    switch (primary_platform) {
+    case PrimaryPlatform::Apple:
+        return "Apple"sv;
+    case PrimaryPlatform::Microsoft:
+        return "Microsoft"sv;
+    case PrimaryPlatform::SiliconGraphics:
+        return "Silicon Graphics"sv;
+    case PrimaryPlatform::Sun:
+        return "Sun"sv;
+    }
+    VERIFY_NOT_REACHED();
+}
+
 StringView rendering_intent_name(RenderingIntent rendering_intent)
 {
     switch (rendering_intent) {
@@ -482,6 +510,7 @@ ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(R
     profile->m_data_color_space = TRY(parse_data_color_space(header));
     profile->m_connection_space = TRY(parse_connection_space(header));
     profile->m_creation_timestamp = TRY(parse_creation_date_time(header));
+    profile->m_primary_platform = TRY(parse_primary_platform(header));
     profile->m_flags = Flags { header.profile_flags };
     profile->m_device_manufacturer = parse_device_manufacturer(header);
     profile->m_device_model = parse_device_model(header);

Userland/Libraries/LibGfx/ICCProfile.h

@@ -104,6 +104,15 @@ enum class ColorSpace : u32 {
 StringView data_color_space_name(ColorSpace);
 StringView profile_connection_space_name(ColorSpace);
 
+// ICC v4, 7.2.10 Primary platform field, Table 20 — Primary platforms
+enum class PrimaryPlatform : u32 {
+    Apple = 0x4150504C,           // 'APPL'
+    Microsoft = 0x4D534654,       // 'MSFT'
+    SiliconGraphics = 0x53474920, // 'SGI '
+    Sun = 0x53554E57,             // 'SUNW'
+};
+StringView primary_platform_name(PrimaryPlatform);
+
 // ICC v4, 7.2.15 Rendering intent field
 enum class RenderingIntent {
     Perceptual,
@@ -215,6 +224,7 @@ public:
     ColorSpace connection_space() const { return m_connection_space; }
 
     time_t creation_timestamp() const { return m_creation_timestamp; }
+    PrimaryPlatform primary_platform() const { return m_primary_platform; }
     Flags flags() const { return m_flags; }
     Optional<DeviceManufacturer> device_manufacturer() const { return m_device_manufacturer; }
     Optional<DeviceModel> device_model() const { return m_device_model; }
@@ -233,6 +243,7 @@ private:
     ColorSpace m_data_color_space;
     ColorSpace m_connection_space;
     time_t m_creation_timestamp;
+    PrimaryPlatform m_primary_platform;
     Flags m_flags;
     Optional<DeviceManufacturer> m_device_manufacturer;
     Optional<DeviceModel> m_device_model;

Userland/Utilities/icc.cpp

@@ -37,6 +37,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     outln("data color space: {}", Gfx::ICC::data_color_space_name(profile->data_color_space()));
     outln("connection space: {}", Gfx::ICC::profile_connection_space_name(profile->connection_space()));
     outln("creation date and time: {}", Core::DateTime::from_timestamp(profile->creation_timestamp()).to_deprecated_string());
+    outln("primary platform: {}", Gfx::ICC::primary_platform_name(profile->primary_platform()));
 
     auto flags = profile->flags();
     outln("flags: 0x{:08x}", flags.bits());