vc_mip

#include <Windows.h>
#include <stdio.h>
#include <patch\CPatch.h>
#include <game_sa\RenderWare.h>

#define NativeTexRead(stream, pTex) ((bool (__cdecl *)(int, RwTexture **))0x63EFE0)(stream, pTex)
#define RwRasterGetNumLevels(raster) ((signed int (__cdecl *)(RwRaster *))0x655420)(raster)

#pragma pack(push, 1)
struct TextureRasterNativeStream
{
  int rasterFormat;
  int d3d9Format;
  unsigned __int16 width;
  unsigned __int16 height;
  unsigned __int8 stride;
  char numLevels;
  unsigned __int8 rasterType;
  char compressionType;
};
#pragma pack(pop)

TextureRasterNativeStream texInfo;

#define StreamRead(stream, pInfo, len) ((bool (__cdecl *)(int, TextureRasterNativeStream *, unsigned int))0x6454B0)(stream, pInfo, len)

unsigned int ReadTextureInfo(int stream, TextureRasterNativeStream *info, unsigned int len)
{
    unsigned int result = StreamRead(stream, info, len);
    memcpy(&texInfo, info, sizeof(TextureRasterNativeStream));
    return result;
}

#define d3dCreateTexture(width, height, numLevels, format, pTexture) ((signed int (__stdcall *)(unsigned int, int, int, unsigned int, int, unsigned int, int, unsigned int))*(unsigned int *)(**(unsigned int **)0x7897A8 + 0x50))(*(unsigned int *)0x7897A8, width, height, numLevels, 0, format, 1, pTexture)

signed int gtaCreateTexture(int width, int height, unsigned int numLevels, unsigned int format, unsigned int pTexture)
{
    // Get the raster
    RwRaster *raster = (RwRaster *)(pTexture - *(unsigned int *)0xA0D8B0);
    unsigned int levels = texInfo.numLevels;
    if((raster->cFormat & 0x80u) == 0)
        levels = 1;
    return d3dCreateTexture(width, height, levels, format, pTexture);
}

void ViceMipsPatch()
{
    CPatch::RedirectCall(0x63F09B, ReadTextureInfo);
    CPatch::RedirectCall(0x63F19F, gtaCreateTexture);
    CPatch::Nop(0x63F0B9, 8);
}

void ViceMips()
{
    ViceMipsPatch();
}

BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved)
{
    switch(reason)
    {
    case DLL_PROCESS_ATTACH:
        ViceMips();
    }
    return TRUE;
}