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MG1/2 | MGS3: Add patches to extend texture buffer size #39

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merged 1 commit into from
Nov 2, 2023
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MG1/2 | MGS3: Add patches to extend texture buffer size #39

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5 changes: 5 additions & 0 deletions MGSHDFix.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,11 @@ Enabled = false
X Multiplier = 1
Y Multiplier = 1

[Texture Buffer]
; MG1/2 | MGS3: Extends size of the temporary texture buffer used by the game, allowing textures larger than 16MB to be loaded
; Setting to the game default of 16 or lower will disable extending
SizeMB = 128

;;;;;; Ultrawide Fixes ;;;;;;

[Fix Aspect Ratio]
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49 changes: 48 additions & 1 deletion src/dllmain.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ bool bWindowedMode;
bool bBorderlessMode;
int iAnisotropicFiltering;
bool bFramebufferFix;
int iTextureBufferSizeMB;
bool bDisableBackgroundInput;
bool bDisableCursor;
bool bMouseSensitivity;
Expand Down Expand Up @@ -366,6 +367,7 @@ void ReadConfig()
inipp::get_value(ini.sections["Mouse Sensitivity"], "Y Multiplier", fMouseSensitivityYMulti);
inipp::get_value(ini.sections["Fix Aspect Ratio"], "Enabled", bAspectFix);
inipp::get_value(ini.sections["Fix HUD"], "Enabled", bHUDFix);
inipp::get_value(ini.sections["Texture Buffer"], "SizeMB", iTextureBufferSizeMB);

// Log config parse
LOG_F(INFO, "Config Parse: iInjectionDelay: %dms", iInjectionDelay);
Expand Down Expand Up @@ -988,7 +990,52 @@ void Miscellaneous()
{
LOG_F(INFO, "MGS 3: Mouse Sensitivity: Pattern scan failed.");
}
}
}

if (iTextureBufferSizeMB > 16 && (sExeName == "METAL GEAR SOLID3.exe" || sExeName == "METAL GEAR.exe"))
{
// MG/MG2 | MGS3: texture buffer size extension
uint32_t NewSize = iTextureBufferSizeMB * 1024 * 1024;

// Scan for the 9 mallocs which set buffer inside CTextureBuffer::sInstance
bool failure = false;
for(int i = 0; i < 9; i++)
{
uint8_t* MGS3_CTextureBufferMallocResult = Memory::PatternScan(baseModule, "75 ?? B9 00 00 00 01 FF");
if(MGS3_CTextureBufferMallocResult)
{
uint32_t* bufferAmount = (uint32_t*)(MGS3_CTextureBufferMallocResult + 3);
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d (0x%" PRIxPTR ") old buffer size: %d", i, MGS3_CTextureBufferMallocResult, *bufferAmount);
Memory::Write((uintptr_t)bufferAmount, NewSize);
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d (0x%" PRIxPTR ") new buffer size: %d", i, MGS3_CTextureBufferMallocResult, *bufferAmount);
}
else
{
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d: Pattern scan failed.", i);
failure = true;
break;
}
}

if (!failure)
{
// CBaseTexture::Create seems to contain code that mallocs buffers based on 16MiB shifted by index of the mip being loaded
// (ie: size = 16MiB >> mipIndex)
// We'll make sure to increase the base 16MiB size it uses too
uint8_t* MGS3_CBaseTextureMallocResult = Memory::PatternScan(baseModule, "75 ?? B8 00 00 00 01");
if (MGS3_CBaseTextureMallocResult)
{
uint32_t* bufferAmount = (uint32_t*)(MGS3_CBaseTextureMallocResult + 3);
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d (0x%" PRIxPTR ") old buffer size: %d", 9, MGS3_CBaseTextureMallocResult, *bufferAmount);
Memory::Write((uintptr_t)bufferAmount, NewSize);
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d (0x%" PRIxPTR ") new buffer size: %d", 9, MGS3_CBaseTextureMallocResult, *bufferAmount);
}
else
{
LOG_F(INFO, "MG/MG2 | MGS 3: Texture Buffer Size: #%d: Pattern scan failed.", 9);
}
}
}
}

DWORD __stdcall Main(void*)
Expand Down