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Extract some logic from QR7

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Update notes, update method names.
10 years since this (apparently custom?) format was whipped up. Probably good to have more accurate documentation for this early-injection format?
This commit is contained in:
Kurt
2026-01-02 13:25:12 -06:00
parent fb52a5ef18
commit 8c5eb6fa9f
3 changed files with 15 additions and 14 deletions
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14
PKHeX.Core/Editing/PKM/QR/QRMessageUtil.cs
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@@ -37,17 +37,21 @@ public static class QRMessageUtil
public static string GetMessage(PKM pk)
{
if (pk is PK7 pk7)
{
Span<byte> payload = stackalloc byte[QR7.SIZE];
QR7.SetQRData(pk7, payload);
return GetMessage(payload);
}
return GetMessage(pk7);
var server = GetExploitURLPrefixPKM(pk.Format);
var data = pk.EncryptedBoxData;
return GetMessageBase64(data, server);
}
/// <inheritdoc cref="GetMessage(PKM)"/>
public static string GetMessage(PK7 pk7, int box = 0, int slot = 0, int num_copies = 1)
{
Span<byte> data = stackalloc byte[QR7.SIZE];
QR7.SetQRData(pk7, data, box, slot, num_copies);
return GetMessage(data);
}
/// <summary>
/// Gets a QR Message from the input <see cref="byte"/> data.
/// </summary>

9
PKHeX.Core/Saves/Substructures/Gen7/QR7.cs
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@@ -9,8 +9,9 @@ namespace PKHeX.Core;
// u32 slot;
// u32 num_copies;
// u8 reserved[0x1C];
// u8 ek7[0x104];
// u8 dex_data[0x60];
// u8 ek7[0x104]; -- starts at 0x30
// u8 alignment[0xC];
// u8 dex_data[0x60]; -- starts at 0x140
// u16 crc16
// sizeof(QR7) == 0x1A2
@@ -43,7 +44,7 @@ private static bool IsGenderDifferent(ushort species)
return (table[index] & (1 << (species & 7))) != 0;
}
private static void GetRawQR(Span<byte> dest, ushort species, byte form, bool shiny, byte gender)
private static void SetDexData(Span<byte> dest, ushort species, byte form, bool shiny, byte gender)
{
dest[..6].Fill(0xFF);
WriteUInt16LittleEndian(dest[0x28..], species);
@@ -86,7 +87,7 @@ public static void SetQRData(PK7 pk7, Span<byte> span, int box = 0, int slot = 0
WriteInt32LittleEndian(span[0x10..], num_copies); // No need to check max num_copies, payload parser handles it on-console.
pk7.EncryptedPartyData.CopyTo(span[0x30..]); // Copy in pokemon data
GetRawQR(span[0x140..], pk7.Species, pk7.Form, pk7.IsShiny, pk7.Gender);
SetDexData(span[0x140..], pk7.Species, pk7.Form, pk7.IsShiny, pk7.Gender);
var chk = Checksums.CRC16Invert(span[..0x1A0]);
WriteUInt16LittleEndian(span[0x1A0..], chk);

6
PKHeX.Drawing.Misc/QR/QREncode.cs
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@@ -32,11 +32,7 @@ public static class QREncode
/// <param name="copies">The number of copies to encode.</param>
/// <returns>A bitmap containing the QR code.</returns>
public static Bitmap GenerateQRCode7(PK7 pk7, int box = 0, int slot = 0, int copies = 1)
{
byte[] data = QR7.GenerateQRData(pk7, box, slot, copies);
var msg = QRMessageUtil.GetMessage(data);
return GenerateQRCode(msg, ppm: 4);
}
=> GenerateQRCode(QRMessageUtil.GetMessage(pk7, box, slot, copies), ppm: 4);
/// <summary>
/// Generates a QR code bitmap from a message string.