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III: Store brightness packed to fix saving low brightness values

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Fixes #26
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Silent 2024-08-21 22:52:01 +02:00
parent 15f9f08052
commit 590ec867db
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GPG Key ID: AE53149BB0C45AF1
1 changed files with 79 additions and 0 deletions
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79
SilentPatchIII/SilentPatchIII.cpp
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@ -839,6 +839,56 @@ namespace SitInBoat
}
// ============= Fixed Brightness saving (fixed in VC) =============
namespace FixedBrightnessSaving
{
// Heuristics we use for determining whether the value is stock or from SilentPatch
// 0 - must have been the default brightness of 256 = stock
// >= 31 - must have been the default brightness of 256 + x = stock
// Otherwise, this must be the "value index" from SilentPatch
int (*orgRead)(int, char*, int);
int Read_Brightness(int file, int* brightness, int size)
{
// This should never happen
if (size != 1)
{
return orgRead(file, reinterpret_cast<char*>(brightness), size);
}
uint8_t tmp;
int result = orgRead(file, reinterpret_cast<char*>(&tmp), sizeof(tmp));
if (result != sizeof(tmp))
{
return result;
}
if (tmp == 0 || tmp >= 31)
{
*brightness = 256 + tmp;
}
else
{
*brightness = (tmp - 1) << 5;
}
return result;
}
int (*orgWrite)(int, const char*, int);
int Write_Brightness(int file, const int* brightness, int size)
{
// This should never happen
if (size != 1)
{
return orgWrite(file, reinterpret_cast<const char*>(brightness), size);
}
const uint32_t brightnessRounded = (*brightness + 31u) & -32;
const uint8_t brightnessPacked = static_cast<uint8_t>(brightnessRounded >> 5) + 1;
return orgWrite(file, reinterpret_cast<const char*>(&brightnessPacked), sizeof(brightnessPacked));
}
}
namespace ModelIndicesReadyHook
{
static void (*orgInitialiseObjectData)(const char*);
@ -1824,6 +1874,35 @@ void Patch_III_Common()
Patch<uint8_t>(spawn_one_car, 0xEB);
}
TXN_CATCH();
// Fixed Brightness saving (fixed in VC)
try
{
using namespace FixedBrightnessSaving;
// Read and Write calls in CMenuManager::LoadSettings and CMenuManager::SaveSettings
// are virtually indistinguishable from each other, so we need to build raw patterns that include
// the pointer to CMenuManager::m_PrefsBrightness
auto prefs_brightness = *get_pattern<int*>("83 3D ? ? ? ? 00 7D 0B", 2);
uint8_t prefs_brightness_bytes[4];
memcpy(&prefs_brightness_bytes, &prefs_brightness, sizeof(prefs_brightness_bytes));
const uint8_t mask[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0, 0x0, 0x0, 0x0, 0xFF, 0xFF, 0xFF };
const uint8_t read_pattern[] { 0x6A, 0x01, 0x68,
prefs_brightness_bytes[0], prefs_brightness_bytes[1], prefs_brightness_bytes[2], prefs_brightness_bytes[3],
0x53, 0xE8, 0x0, 0x0, 0x0, 0x0, 0x83, 0xC4, 0x0C };
const uint8_t write_pattern[] { 0x6A, 0x01, 0x68,
prefs_brightness_bytes[0], prefs_brightness_bytes[1], prefs_brightness_bytes[2], prefs_brightness_bytes[3],
0x55, 0xE8, 0x0, 0x0, 0x0, 0x0, 0x83, 0xC4, 0x0C };
auto read = pattern({read_pattern, sizeof(read_pattern)}, {mask, sizeof(mask)}).get_first<void>(8);
auto write = pattern({write_pattern, sizeof(write_pattern)}, {mask, sizeof(mask)}).get_first<void>(8);
InterceptCall(read, orgRead, Read_Brightness);
InterceptCall(write, orgWrite, Write_Brightness);
}
TXN_CATCH();
}
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)