[MetaHook] Load large texture from model

We need hook "GL_LoadTexture" engine function.

GL_LOADTEXTURE_SIG from hw.dll(3266) engine, can not use for other engine version.

#include <metahook.h>
#include "qgl.h"
#include "surface.h"

extern DWORD g_dwEngineBase, g_dwEngineSize;

#define GL_LOADTEXTURE_SIG "xA1xC8x20xECx01x8Bx4Cx24x20x8Bx54x24x1Cx50x8Bx44"

int (*g_pfnGL_LoadTexture)(char *identifier, int textureType, int width, int height, BYTE *data, int mipmap, int iType, BYTE *pPal) = 0;

int GL_LoadTexture(char *identifier, int textureType, int width, int height, BYTE *data, int mipmap, int iType, BYTE *pPal)
{
    if (width > 512 || height > 512)
    {
        static BYTE buffer[2048 * 2048 * 3];

        for (DWORD i = 0; i < width * height; ++i)
        {
            buffer[(i * 3) + 0] = pPal[(data[i] * 3) + 0];
            buffer[(i * 3) + 1] = pPal[(data[i] * 3) + 1];
            buffer[(i * 3) + 2] = pPal[(data[i] * 3) + 2];
        }

        int id = g_pSurface->CreateNewTextureID();

        qglBindTexture(GL_TEXTURE_2D, id);
        qglTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
        qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

        return id;
    }

    return g_pfnGL_LoadTexture(identifier, textureType, width, height, data, mipmap, iType, pPal);
}

void Hook_InstallHook(void)
{
    g_pfnGL_LoadTexture = (int (*)(char *, int, int, int, BYTE *, int, int, BYTE *))g_pMetaHookAPI->SearchPattern((void *)g_dwEngineBase, g_dwEngineSize, GL_LOADTEXTURE_SIG, sizeof(GL_LOADTEXTURE_SIG) - 1);

    if (g_pfnGL_LoadTexture)
    {
        g_pMetaHookAPI->InlineHook(g_pfnGL_LoadTexture, GL_LoadTexture, (void *&)g_pfnGL_LoadTexture);
    }
}