devilutionX/Source/engine.cpp

//HEADER_GOES_HERE

#include "../types.h"

char gbPixelCol;  // automap pixel color 8-bit (palette entry)
int dword_52B970; // BOOLEAN flip - if y < x
int orgseed;      // weak
int sgnWidth;
int sglGameSeed; // weak
static CRITICAL_SECTION sgMemCrit;
int SeedCount;    // weak
int dword_52B99C; // BOOLEAN valid - if x/y are in bounds

const int rand_increment = 1;           // unused
const int rand_multiplier = 0x015A4E35; // unused

void __fastcall CelDrawDatOnly(char *pDecodeTo, char *pRLEBytes, int dwRLESize, int dwRLEWdt)
{
	char *v4;         // esi
	char *v5;         // edi
	int v6;           // edx
	unsigned int v7;  // eax
	unsigned int v8;  // ecx
	char v9;          // cf
	unsigned int v10; // ecx
	char *v11;        // [esp+4h] [ebp-8h]

	v11 = pRLEBytes;
	if (pDecodeTo && pRLEBytes) {
		v4 = pRLEBytes;
		v5 = pDecodeTo;
		do {
			v6 = dwRLEWdt;
			do {
				while (1) {
					v7 = (unsigned char)*v4++;
					if ((v7 & 0x80u) == 0)
						break;
					_LOBYTE(v7) = -(char)v7;
					v5 += v7;
					v6 -= v7;
					if (!v6)
						goto LABEL_14;
				}
				v6 -= v7;
				v8 = v7 >> 1;
				if (v7 & 1) {
					*v5++ = *v4++;
					if (!v8)
						continue;
				}
				v9 = v8 & 1;
				v10 = v7 >> 2;
				if (v9) {
					*(_WORD *)v5 = *(_WORD *)v4;
					v4 += 2;
					v5 += 2;
					if (!v10)
						continue;
				}
				qmemcpy(v5, v4, 4 * v10);
				v4 += 4 * v10;
				v5 += 4 * v10;
			} while (v6);
		LABEL_14:
			v5 += -dwRLEWdt - 768;
		} while (&v11[dwRLESize] != v4);
	}
}

void __fastcall CelDecodeOnly(int screen_x, int screen_y, void *pCelBuff, int frame, int frame_width)
{
	if (gpBuffer) {
		if (pCelBuff)
			CelDrawDatOnly(
			    (char *)gpBuffer + screen_y_times_768[screen_y] + screen_x,
			    (char *)pCelBuff + *((_DWORD *)pCelBuff + frame),
			    *((_DWORD *)pCelBuff + frame + 1) - *((_DWORD *)pCelBuff + frame),
			    frame_width);
	}
}

void __fastcall CelDecDatOnly(char *pBuff, char *pCelBuff, int frame, int frame_width)
{
	if (pCelBuff) {
		if (pBuff)
			CelDrawDatOnly(
			    pBuff,
			    &pCelBuff[*(_DWORD *)&pCelBuff[4 * frame]],
			    *(_DWORD *)&pCelBuff[4 * frame + 4] - *(_DWORD *)&pCelBuff[4 * frame],
			    frame_width);
	}
}

void __fastcall CelDrawHdrOnly(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int always_0, int direction)
{
	int v7;   // edx
	char *v8; // eax
	int v9;   // edi
	int v10;  // ecx
	int v11;  // [esp+Ch] [ebp-8h]
	int v12;  // [esp+10h] [ebp-4h]

	v12 = screen_y;
	v11 = screen_x;
	if (gpBuffer) {
		if (pCelBuff) {
			v7 = *(_DWORD *)&pCelBuff[4 * frame];
			v8 = &pCelBuff[v7];
			v9 = *(unsigned short *)&pCelBuff[v7 + always_0];
			if (*(_WORD *)&pCelBuff[v7 + always_0]) {
				if (direction != 8 && *(_WORD *)&v8[direction])
					v10 = *(unsigned short *)&v8[direction] - v9;
				else
					v10 = *(_DWORD *)&pCelBuff[4 * frame + 4] - v7 - v9;
				CelDrawDatOnly(
				    (char *)gpBuffer + screen_y_times_768[v12 - 16 * always_0] + v11,
				    &v8[v9],
				    v10,
				    frame_width);
			}
		}
	}
}

void __fastcall CelDecodeHdrOnly(char *pBuff, char *pCelBuff, int frame, int frame_width, int always_0, int direction)
{
	int v6;   // esi
	char *v7; // eax
	int v8;   // ebx
	int v9;   // edx
	int v10;  // edx

	if (pCelBuff) {
		if (pBuff) {
			v6 = *(_DWORD *)&pCelBuff[4 * frame];
			v7 = &pCelBuff[v6];
			v8 = *(unsigned short *)&pCelBuff[v6 + always_0];
			if (*(_WORD *)&pCelBuff[v6 + always_0]) {
				v9 = *(_DWORD *)&pCelBuff[4 * frame + 4] - v6;
				if (direction != 8 && *(_WORD *)&v7[direction])
					v10 = *(unsigned short *)&v7[direction] - v8;
				else
					v10 = v9 - v8;
				CelDrawDatOnly(pBuff, &v7[v8], v10, frame_width);
			}
		}
	}
}

void __fastcall CelDecDatLightOnly(char *pDecodeTo, char *pRLEBytes, int frame_content_size, int frame_width)
{
	char *v4; // esi
	char *v5; // edi
	char *v6; // ebx
	int v7;   // edx
	int v8;   // eax
	int v9;   // ST00_4
	char *a3; // [esp+Ch] [ebp-10h]

	if (pDecodeTo && pRLEBytes) {
		a3 = &pLightTbl[256 * light_table_index];
		v4 = pRLEBytes;
		v5 = pDecodeTo;
		v6 = &pRLEBytes[frame_content_size];
		do {
			v7 = frame_width;
			do {
				while (1) {
					v8 = (unsigned char)*v4++;
					if ((v8 & 0x80u) != 0) /* check sign */
						break;
					v9 = v7 - v8;
					CelDecDatLightEntry(v8, a3, &v5, &v4);
					v7 = v9;
					if (!v9)
						goto LABEL_9;
				}
				_LOBYTE(v8) = -(char)v8;
				v5 += v8;
				v7 -= v8;
			} while (v7);
		LABEL_9:
			v5 += -frame_width - 768;
		} while (v6 != v4);
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall CelDecDatLightEntry(unsigned char n, char *LightIndex, char **pDecodeTo, char **pRLEBytes)
{
	int i;

	for (i = 0; i < n; i++) {
		**pDecodeTo = LightIndex[**pRLEBytes];
		(*pRLEBytes)++;
		(*pDecodeTo)++;
	}
}

void __fastcall CelDecDatLightTrans(char *pDecodeTo, char *pRLEBytes, int frame_content_size, int frame_width)
{
	char *v4;         // esi
	int v5;           // edi
	char *v6;         // ebx
	int v7;           // edx
	unsigned int v8;  // eax
	unsigned int v10; // ecx
	char v11;         // cf
	unsigned int v12; // ecx
	char *v13;        // esi
	_BYTE *v14;       // edi
	_BYTE *v18;       // edi
	unsigned int v21; // ecx
	_BYTE *v25;       // edi
	char *v26;        // [esp-4h] [ebp-24h]
	char *v27;        // [esp+Ch] [ebp-14h]
	int v28;          // [esp+14h] [ebp-Ch]
	int _EAX;
	char *_EBX;

	if (pDecodeTo && pRLEBytes) {
		v27 = &pLightTbl[256 * light_table_index];
		v4 = pRLEBytes;
		v5 = (int)pDecodeTo;
		v6 = &pRLEBytes[frame_content_size];
		v28 = (unsigned char)pDecodeTo & 1;
		do {
			v7 = frame_width;
			do {
				while (1) {
					v8 = (unsigned char)*v4++;
					if ((v8 & 0x80u) != 0)
						break;
					v26 = v6;
					_EBX = v27;
					v7 -= v8;
					if ((v5 & 1) == v28) {
						v10 = v8 >> 1;
						if (!(v8 & 1))
							goto LABEL_10;
						++v4;
						++v5;
						if (v10) {
						LABEL_17:
							v11 = v10 & 1;
							v21 = v10 >> 1;
							if (!v11)
								goto LABEL_26;
							_EAX = *v4;
							ASM_XLAT(_EAX, _EBX);
							*(_BYTE *)v5 = _EAX;
							v4 += 2;
							v5 += 2;
							if (v21) {
							LABEL_26:
								do {
									_EAX = *(_DWORD *)v4;
									v4 += 4;
									ASM_XLAT(_EAX, _EBX);
									*(_BYTE *)v5 = _EAX;
									v25 = (_BYTE *)(v5 + 2);
									_EAX = _rotr(_EAX, 16);
									ASM_XLAT(_EAX, _EBX);
									*v25 = _EAX;
									v5 = (int)(v25 + 2);
									--v21;
								} while (v21);
							}
							goto LABEL_20;
						}
					} else {
						v10 = v8 >> 1;
						if (!(v8 & 1))
							goto LABEL_17;
						_EAX = *v4++;
						ASM_XLAT(_EAX, _EBX);
						*(_BYTE *)v5++ = _EAX;
						if (v10) {
						LABEL_10:
							v11 = v10 & 1;
							v12 = v10 >> 1;
							if (!v11)
								goto LABEL_27;
							v13 = v4 + 1;
							v14 = (_BYTE *)(v5 + 1);
							_EAX = *v13;
							v4 = v13 + 1;
							ASM_XLAT(_EAX, _EBX);
							*v14 = _EAX;
							v5 = (int)(v14 + 1);
							if (v12) {
							LABEL_27:
								do {
									_EAX = *(_DWORD *)v4;
									v4 += 4;
									v18 = (_BYTE *)(v5 + 1);
									_EAX = _rotr(_EAX, 8);
									ASM_XLAT(_EAX, _EBX);
									*v18 = _EAX;
									_EAX = _rotr(_EAX, 16);
									v18 += 2;
									ASM_XLAT(_EAX, _EBX);
									*v18 = _EAX;
									v5 = (int)(v18 + 1);
									--v12;
								} while (v12);
							}
							goto LABEL_20;
						}
					}
				LABEL_20:
					v6 = v26;
					if (!v7)
						goto LABEL_23;
				}
				_LOBYTE(v8) = -(char)v8;
				v5 += v8;
				v7 -= v8;
			} while (v7);
		LABEL_23:
			v5 -= frame_width + 768;
			v28 = ((_BYTE)v28 + 1) & 1;
		} while (v6 != v4);
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall CelDecodeLightOnly(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width)
{
	int v5;   // ebx
	int v6;   // esi
	char *v7; // edx
	char *v8; // ecx
	int v9;   // [esp-8h] [ebp-14h]

	v5 = screen_y;
	if (gpBuffer && pCelBuff) {
		v6 = *(_DWORD *)&pCelBuff[4 * frame];
		v7 = &pCelBuff[v6];
		v8 = (char *)gpBuffer + screen_y_times_768[v5] + screen_x;
		v9 = *(_DWORD *)&pCelBuff[4 * frame + 4] - v6;
		if (light_table_index)
			CelDecDatLightOnly(v8, v7, v9, frame_width);
		else
			CelDrawDatOnly(v8, v7, v9, frame_width);
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall CelDecodeHdrLightOnly(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int always_0, int direction)
{
	int v7;        // esi
	char *v8;      // ecx
	int v9;        // edi
	char *v10;     // edx
	int v11;       // ebx
	int v12;       // ebx
	char *v13;     // edx
	char *v14;     // ecx
	int v15;       // [esp+Ch] [ebp-4h]
	char *cel_buf; // [esp+18h] [ebp+8h]

	v7 = screen_y;
	v15 = screen_x;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			v9 = *(_DWORD *)&pCelBuff[4 * frame];
			v10 = &pCelBuff[v9];
			v11 = *(unsigned short *)&pCelBuff[v9 + always_0];
			cel_buf = (char *)*(unsigned short *)&pCelBuff[v9 + always_0];
			if (v11) {
				if (direction != 8 && *(_WORD *)&v10[direction])
					v12 = *(unsigned short *)&v10[direction] - (_DWORD)cel_buf;
				else
					v12 = *(_DWORD *)&v8[4 * frame + 4] - v9 - (_DWORD)cel_buf;
				v13 = &v10[(_DWORD)cel_buf];
				v14 = (char *)gpBuffer + screen_y_times_768[v7 - 16 * always_0] + v15;
				if (light_table_index)
					CelDecDatLightOnly(v14, v13, v12, frame_width);
				else
					CelDrawDatOnly(v14, v13, v12, frame_width);
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall CelDecodeHdrLightTrans(char *pBuff, char *pCelBuff, int frame, int frame_width, int always_0, int direction)
{
	char *v6;  // eax
	int v7;    // esi
	char *v8;  // edx
	int v9;    // ebx
	int v10;   // eax
	int v11;   // eax
	char *v12; // edx

	v6 = pCelBuff;
	if (pCelBuff) {
		if (pBuff) {
			v7 = *(_DWORD *)&pCelBuff[4 * frame];
			v8 = &pCelBuff[v7];
			v9 = *(unsigned short *)&v6[v7 + always_0];
			if (*(_WORD *)&v6[v7 + always_0]) {
				v10 = *(_DWORD *)&v6[4 * frame + 4] - v7;
				if (direction != 8 && *(_WORD *)&v8[direction])
					v11 = *(unsigned short *)&v8[direction] - v9;
				else
					v11 = v10 - v9;
				v12 = &v8[v9];
				if (cel_transparency_active) {
					CelDecDatLightTrans(pBuff, v12, v11, frame_width);
				} else if (light_table_index) {
					CelDecDatLightOnly(pBuff, v12, v11, frame_width);
				} else {
					CelDrawDatOnly(pBuff, v12, v11, frame_width);
				}
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;
// 69CF94: using guessed type int cel_transparency_active;

void __fastcall CelDrawHdrLightRed(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int always_0, int direction, char always_1)
{
	char *v8;       // esi
	int v9;         // ebx
	int v10;        // eax
	char *v11;      // edi
	int v12;        // ecx
	int v13;        // esi
	int v14;        // eax
	int v15;        // eax
	_BYTE *v16;     // esi
	char *v17;      // edi
	int v18;        // edx
	int v19;        // eax
	int v20;        // ecx
	int v21;        // [esp+Ch] [ebp-4h]
	char *v22;      // [esp+Ch] [ebp-4h]
	char *cel_buf;  // [esp+18h] [ebp+8h]
	char *cel_bufa; // [esp+18h] [ebp+8h]
	int framea;     // [esp+1Ch] [ebp+Ch]
	int always_0a;  // [esp+24h] [ebp+14h]
	int directiona; // [esp+28h] [ebp+18h]

	v21 = screen_x;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			v9 = *(_DWORD *)&pCelBuff[4 * frame];
			v10 = always_0;
			v11 = &pCelBuff[v9];
			v12 = *(unsigned short *)&pCelBuff[v9 + always_0];
			cel_buf = (char *)*(unsigned short *)&pCelBuff[v9 + always_0];
			if (v12) {
				v13 = *(_DWORD *)&v8[4 * frame + 4] - v9;
				if (direction != 8 && *(_WORD *)&v11[direction])
					always_0a = *(unsigned short *)&v11[direction] - (_DWORD)cel_buf;
				else
					always_0a = v13 - (_DWORD)cel_buf;
				directiona = (int)&v11[(_DWORD)cel_buf];
				cel_bufa = (char *)gpBuffer + screen_y_times_768[screen_y - 16 * v10] + v21;
				v14 = -(light4flag != 0);
				_LOWORD(v14) = v14 & 0xF400;
				v15 = v14 + 4096;
				framea = v15;
				if (always_1 == 2) {
					v15 += 256;
					framea = v15;
				}
				if (always_1 >= 4)
					framea = v15 + (always_1 << 8) - 256;
				v22 = &pLightTbl[framea];
				v16 = (_BYTE *)directiona;
				v17 = cel_bufa;
				do {
					v18 = frame_width;
					do {
						while (1) {
							v19 = (unsigned char)*v16++;
							if ((v19 & 0x80u) == 0)
								break;
							_LOBYTE(v19) = -(char)v19;
							v17 += v19;
							v18 -= v19;
							if (!v18)
								goto LABEL_20;
						}
						v18 -= v19;
						v20 = v19;
						do {
							_LOBYTE(v19) = *v16++;
							*v17 = v22[v19];
							--v20;
							++v17;
						} while (v20);
					} while (v18);
				LABEL_20:
					v17 += -frame_width - 768;
				} while ((_BYTE *)(directiona + always_0a) != v16);
			}
		}
	}
}
// 525728: using guessed type int light4flag;

void __fastcall Cel2DecDatOnly(char *pDecodeTo, char *pRLEBytes, int frame_content_size, int frame_width)
{
	char *v4;         // esi
	char *v5;         // edi
	int v6;           // edx
	unsigned int v7;  // eax
	unsigned int v8;  // ecx
	char v9;          // cf
	unsigned int v10; // ecx
	char *v11;        // [esp+4h] [ebp-8h]

	v11 = pRLEBytes;
	if (pDecodeTo && pRLEBytes && gpBuffer) {
		v4 = pRLEBytes;
		v5 = pDecodeTo;
		do {
			v6 = frame_width;
			do {
				while (1) {
					v7 = (unsigned char)*v4++;
					if ((v7 & 0x80u) == 0)
						break;
					_LOBYTE(v7) = -(char)v7;
					v5 += v7;
					v6 -= v7;
					if (!v6)
						goto LABEL_17;
				}
				v6 -= v7;
				if (v5 < (char *)gpBufEnd) {
					v8 = v7 >> 1;
					if (!(v7 & 1) || (*v5 = *v4, ++v4, ++v5, v8)) {
						v9 = v8 & 1;
						v10 = v7 >> 2;
						if (!v9 || (*(_WORD *)v5 = *(_WORD *)v4, v4 += 2, v5 += 2, v10)) {
							qmemcpy(v5, v4, 4 * v10);
							v4 += 4 * v10;
							v5 += 4 * v10;
						}
					}
				} else {
					v4 += v7;
					v5 += v7;
				}
			} while (v6);
		LABEL_17:
			v5 += -frame_width - 768;
		} while (&v11[frame_content_size] != v4);
	}
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cel2DrawHdrOnly(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int a6, int direction)
{
	int v7;   // edx
	char *v8; // eax
	int v9;   // edi
	int v10;  // ecx
	int v11;  // [esp+Ch] [ebp-8h]
	int v12;  // [esp+10h] [ebp-4h]

	v12 = screen_y;
	v11 = screen_x;
	if (gpBuffer) {
		if (pCelBuff) {
			v7 = *(_DWORD *)&pCelBuff[4 * frame];
			v8 = &pCelBuff[v7];
			v9 = *(unsigned short *)&pCelBuff[v7 + a6];
			if (*(_WORD *)&pCelBuff[v7 + a6]) {
				if (direction != 8 && *(_WORD *)&v8[direction])
					v10 = *(unsigned short *)&v8[direction] - v9;
				else
					v10 = *(_DWORD *)&pCelBuff[4 * frame + 4] - v7 - v9;
				Cel2DecDatOnly(
				    (char *)gpBuffer + screen_y_times_768[v12 - 16 * a6] + v11,
				    &v8[v9],
				    v10,
				    frame_width);
			}
		}
	}
}

void __fastcall Cel2DecodeHdrOnly(char *pBuff, char *pCelBuff, int frame, int frame_width, int a5, int direction)
{
	int v6;   // edi
	char *v7; // esi
	int v8;   // ebx
	int v9;   // eax
	int v10;  // edx
	int v11;  // eax

	if (pCelBuff) {
		if (pBuff) {
			v6 = *(_DWORD *)&pCelBuff[4 * frame];
			v7 = &pCelBuff[v6];
			v8 = *(unsigned short *)&pCelBuff[v6 + a5];
			if (*(_WORD *)&pCelBuff[v6 + a5]) {
				v9 = *(_DWORD *)&pCelBuff[4 * frame + 4] - v6;
				v10 = *(unsigned short *)&v7[direction];
				if (direction == 8)
					v10 = 0;
				if (v10)
					v11 = v10 - v8;
				else
					v11 = v9 - v8;
				Cel2DecDatOnly(pBuff, &v7[v8], v11, frame_width);
			}
		}
	}
}

void __fastcall Cel2DecDatLightOnly(char *pDecodeTo, char *pRLEBytes, int frame_content_size, int frame_width)
{
	char *v4; // esi
	char *v5; // edi
	char *v6; // ebx
	int v7;   // edx
	int v8;   // eax
	int v9;   // ST00_4
	char *a3; // [esp+Ch] [ebp-10h]

	if (pDecodeTo && pRLEBytes && gpBuffer) {
		a3 = &pLightTbl[256 * light_table_index];
		v4 = pRLEBytes;
		v5 = pDecodeTo;
		v6 = &pRLEBytes[frame_content_size];
		do {
			v7 = frame_width;
			do {
				while (1) {
					v8 = (unsigned __int8)*v4++;
					if ((v8 & 0x80u) == 0) /* check sign */
						break;
					_LOBYTE(v8) = -(char)v8;
					v5 += v8;
					v7 -= v8;
					if (!v7)
						goto LABEL_13;
				}
				v7 -= v8;
				if (v5 < (char *)gpBufEnd) {
					v9 = v7;
					Cel2DecDatLightEntry(v8, a3, &v5, &v4);
					v7 = v9;
				} else {
					v4 += v8;
					v5 += v8;
				}
			} while (v7);
		LABEL_13:
			v5 += -frame_width - 768;
		} while (v6 != v4);
	}
}
// 69BEF8: using guessed type int light_table_index;
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cel2DecDatLightEntry(unsigned char n, char *LightIndex, char **pDecodeTo, char **pRLEBytes)
{
	int i;

	for (i = 0; i < n; i++) {
		**pDecodeTo = LightIndex[**pRLEBytes];
		(*pRLEBytes)++;
		(*pDecodeTo)++;
	}
}

void __fastcall Cel2DecDatLightTrans(char *pDecodeTo, char *pRLEBytes, int frame_content_size, int frame_width)
{
	char *v4;         // esi
	unsigned int v5;  // edi
	char *v6;         // ebx
	int v7;           // edx
	unsigned int v8;  // eax
	unsigned int v10; // ecx
	char v11;         // cf
	unsigned int v12; // ecx
	char *v13;        // esi
	_BYTE *v14;       // edi
	_BYTE *v18;       // edi
	unsigned int v21; // ecx
	_BYTE *v25;       // edi
	char *v26;        // [esp-4h] [ebp-24h]
	char *v27;        // [esp+Ch] [ebp-14h]
	int v28;          // [esp+14h] [ebp-Ch]
	int _EAX;
	char *_EBX;

	if (pDecodeTo && pRLEBytes && gpBuffer) {
		v27 = &pLightTbl[256 * light_table_index];
		v4 = pRLEBytes;
		v5 = (unsigned int)pDecodeTo;
		v6 = &pRLEBytes[frame_content_size];
		v28 = (unsigned char)pDecodeTo & 1;
		do {
			v7 = frame_width;
			do {
				while (1) {
					v8 = (unsigned char)*v4++;
					if ((v8 & 0x80u) != 0)
						break;
					v26 = v6;
					_EBX = v27;
					v7 -= v8;
					if (v5 < (unsigned int)gpBufEnd) {
						if ((v5 & 1) == v28) {
							v10 = v8 >> 1;
							if (!(v8 & 1))
								goto LABEL_13;
							++v4;
							++v5;
							if (v10) {
							LABEL_20:
								v11 = v10 & 1;
								v21 = v10 >> 1;
								if (!v11)
									goto LABEL_29;
								_EAX = *v4;
								ASM_XLAT(_EAX, _EBX);
								*(_BYTE *)v5 = _EAX;
								v4 += 2;
								v5 += 2;
								if (v21) {
								LABEL_29:
									do {
										_EAX = *(_DWORD *)v4;
										v4 += 4;
										ASM_XLAT(_EAX, _EBX);
										*(_BYTE *)v5 = _EAX;
										v25 = (_BYTE *)(v5 + 2);
										_EAX = _rotr(_EAX, 16);
										ASM_XLAT(_EAX, _EBX);
										*v25 = _EAX;
										v5 = (unsigned int)(v25 + 2);
										--v21;
									} while (v21);
								}
								goto LABEL_23;
							}
						} else {
							v10 = v8 >> 1;
							if (!(v8 & 1))
								goto LABEL_20;
							_EAX = *v4++;
							ASM_XLAT(_EAX, _EBX);
							*(_BYTE *)v5++ = _EAX;
							if (v10) {
							LABEL_13:
								v11 = v10 & 1;
								v12 = v10 >> 1;
								if (!v11)
									goto LABEL_30;
								v13 = v4 + 1;
								v14 = (_BYTE *)(v5 + 1);
								_EAX = *v13;
								v4 = v13 + 1;
								ASM_XLAT(_EAX, _EBX);
								*v14 = _EAX;
								v5 = (unsigned int)(v14 + 1);
								if (v12) {
								LABEL_30:
									do {
										_EAX = *(_DWORD *)v4;
										v4 += 4;
										v18 = (_BYTE *)(v5 + 1);
										_EAX = _rotr(_EAX, 8);
										ASM_XLAT(_EAX, _EBX);
										*v18 = _EAX;
										_EAX = _rotr(_EAX, 16);
										v18 += 2;
										ASM_XLAT(_EAX, _EBX);
										*v18 = _EAX;
										v5 = (unsigned int)(v18 + 1);
										--v12;
									} while (v12);
								}
								goto LABEL_23;
							}
						}
					} else {
						v4 += v8;
						v5 += v8;
					}
				LABEL_23:
					v6 = v26;
					if (!v7)
						goto LABEL_26;
				}
				_LOBYTE(v8) = -(char)v8;
				v5 += v8;
				v7 -= v8;
			} while (v7);
		LABEL_26:
			v5 -= frame_width + 768;
			v28 = ((_BYTE)v28 + 1) & 1;
		} while (v6 != v4);
	}
}
// 69BEF8: using guessed type int light_table_index;
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cel2DecodeHdrLight(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int a6, int direction)
{
	int v7;        // esi
	char *v8;      // eax
	int v9;        // edi
	char *v10;     // edx
	int v11;       // ebx
	int v12;       // eax
	int v13;       // edi
	int v14;       // eax
	char *v15;     // edx
	char *v16;     // ecx
	char *cel_buf; // [esp+18h] [ebp+8h]

	v7 = screen_y;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			v9 = *(_DWORD *)&pCelBuff[4 * frame];
			v10 = &pCelBuff[v9];
			v11 = *(unsigned short *)&pCelBuff[v9 + a6];
			cel_buf = (char *)*(unsigned short *)&pCelBuff[v9 + a6];
			if (v11) {
				v12 = *(_DWORD *)&v8[4 * frame + 4] - v9;
				v13 = *(unsigned short *)&v10[direction];
				if (direction == 8)
					v13 = 0;
				if (v13)
					v14 = v13 - (_DWORD)cel_buf;
				else
					v14 = v12 - (_DWORD)cel_buf;
				v15 = &v10[(_DWORD)cel_buf];
				v16 = (char *)gpBuffer + screen_y_times_768[v7 - 16 * a6] + screen_x;
				if (light_table_index)
					Cel2DecDatLightOnly(v16, v15, v14, frame_width);
				else
					Cel2DecDatOnly(v16, v15, v14, frame_width);
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall Cel2DecodeLightTrans(char *dst_buf, char *pCelBuff, int frame, int frame_width, int a5, int direction)
{
	char *v6;  // eax
	int v7;    // esi
	char *v8;  // edx
	int v9;    // ebx
	int v10;   // eax
	int v11;   // esi
	int v12;   // eax
	char *v13; // edx

	v6 = pCelBuff;
	if (pCelBuff) {
		v7 = *(_DWORD *)&pCelBuff[4 * frame];
		v8 = &pCelBuff[v7];
		v9 = *(unsigned short *)&v6[v7 + a5];
		if (*(_WORD *)&v6[v7 + a5]) {
			v10 = *(_DWORD *)&v6[4 * frame + 4] - v7;
			v11 = *(unsigned short *)&v8[direction];
			if (direction == 8)
				v11 = 0;
			if (v11)
				v12 = v11 - v9;
			else
				v12 = v10 - v9;
			v13 = &v8[v9];
			if (cel_transparency_active) {
				Cel2DecDatLightTrans(dst_buf, v13, v12, frame_width);
			} else if (light_table_index) {
				Cel2DecDatLightOnly(dst_buf, v13, v12, frame_width);
			} else {
				Cel2DecDatOnly(dst_buf, v13, v12, frame_width);
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;
// 69CF94: using guessed type int cel_transparency_active;

void __fastcall Cel2DrawHdrLightRed(int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int always_0, int direction, char always_1)
{
	char *v8;        // esi
	int v9;          // ebx
	char *v10;       // edi
	int v11;         // ecx
	int v12;         // esi
	int v13;         // eax
	int v14;         // eax
	_BYTE *v15;      // esi
	_BYTE *v16;      // edi
	int v17;         // ecx
	int v18;         // edx
	int v19;         // ecx
	int v20;         // eax
	_BYTE *v21;      // [esp-4h] [ebp-14h]
	int v22;         // [esp+Ch] [ebp-4h]
	char *cel_buf;   // [esp+18h] [ebp+8h]
	char *cel_bufa;  // [esp+18h] [ebp+8h]
	int framea;      // [esp+1Ch] [ebp+Ch]
	char *always_0a; // [esp+24h] [ebp+14h]
	int directiona;  // [esp+28h] [ebp+18h]

	v22 = screen_x;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			v9 = *(_DWORD *)&pCelBuff[4 * frame];
			v10 = &pCelBuff[v9];
			v11 = *(unsigned short *)&pCelBuff[v9 + always_0];
			cel_buf = (char *)*(unsigned short *)&pCelBuff[v9 + always_0];
			if (v11) {
				v12 = *(_DWORD *)&v8[4 * frame + 4] - v9;
				if (direction != 8 && *(_WORD *)&v10[direction])
					framea = *(unsigned short *)&v10[direction] - (_DWORD)cel_buf;
				else
					framea = v12 - (_DWORD)cel_buf;
				directiona = (int)&v10[(_DWORD)cel_buf];
				always_0a = (char *)gpBuffer + screen_y_times_768[screen_y - 16 * always_0] + v22;
				v13 = -(light4flag != 0);
				_LOWORD(v13) = v13 & 0xF400;
				v14 = v13 + 4096;
				if (always_1 == 2)
					v14 += 256;
				if (always_1 >= 4)
					v14 = v14 + (always_1 << 8) - 256;
				cel_bufa = &pLightTbl[v14];
				v15 = (_BYTE *)directiona;
				v16 = (unsigned char *)always_0a;
				v17 = directiona + framea;
				do {
					v21 = (_BYTE *)v17;
					v18 = frame_width;
					v19 = 0;
					do {
						while (1) {
							v20 = (unsigned char)*v15++;
							if ((v20 & 0x80u) == 0)
								break;
							_LOBYTE(v20) = -(char)v20;
							v16 += v20;
							v18 -= v20;
							if (!v18)
								goto LABEL_21;
						}
						v18 -= v20;
						if (v16 < gpBufEnd) {
							do {
								_LOBYTE(v19) = *v15++;
								*v16 = cel_bufa[v19];
								--v20;
								++v16;
							} while (v20);
						} else {
							v15 += v20;
							v16 += v20;
						}
					} while (v18);
				LABEL_21:
					v17 = (int)v21;
					v16 += -frame_width - 768;
				} while (v21 != v15);
			}
		}
	}
}
// 525728: using guessed type int light4flag;
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall CelDecodeRect(char *pBuff, int always_0, int dst_height, int dst_width, char *pCelBuff, int frame, int frame_width)
{
	char *v7;         // ebx
	char *v8;         // esi
	char *v9;         // edi
	int v10;          // ebx
	int v11;          // edx
	unsigned int v12; // eax
	unsigned int v13; // ecx
	char v14;         // cf
	unsigned int v15; // ecx
	int dst_widtha;   // [esp+14h] [ebp+Ch]

	if (pCelBuff && pBuff) {
		v7 = &pCelBuff[4 * frame];
		v8 = &pCelBuff[*(_DWORD *)v7];
		v9 = &pBuff[dst_width * dst_height + always_0];
		dst_widtha = frame_width + dst_width;
		v10 = (int)&v8[*((_DWORD *)v7 + 1) - *(_DWORD *)v7];
		do {
			v11 = frame_width;
			do {
				while (1) {
					v12 = (unsigned char)*v8++;
					if ((v12 & 0x80u) == 0)
						break;
					_LOBYTE(v12) = -(char)v12;
					v9 += v12;
					v11 -= v12;
					if (!v11)
						goto LABEL_14;
				}
				v11 -= v12;
				v13 = v12 >> 1;
				if (v12 & 1) {
					*v9++ = *v8++;
					if (!v13)
						continue;
				}
				v14 = v13 & 1;
				v15 = v12 >> 2;
				if (v14) {
					*(_WORD *)v9 = *(_WORD *)v8;
					v8 += 2;
					v9 += 2;
					if (!v15)
						continue;
				}
				qmemcpy(v9, v8, 4 * v15);
				v8 += 4 * v15;
				v9 += 4 * v15;
			} while (v11);
		LABEL_14:
			v9 -= dst_widtha;
		} while ((char *)v10 != v8);
	}
}

void __fastcall CelDecodeClr(BYTE colour, int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int a7, int direction)
{
	char *v8;  // ebx
	int v9;    // eax
	char *v10; // esi
	char *v11; // edi
	int v12;   // edx
	int v13;   // eax
	int v14;   // ecx
	char v15;  // al
	int v16;   // [esp+Ch] [ebp-10h]
	char *v17; // [esp+10h] [ebp-Ch]
	int v18;   // [esp+14h] [ebp-8h]
	char v19;  // [esp+18h] [ebp-4h]

	v19 = colour;
	if (pCelBuff) {
		if (gpBuffer) {
			v8 = &pCelBuff[4 * frame];
			v17 = &pCelBuff[*(_DWORD *)v8];
			v16 = *(unsigned short *)&v17[a7];
			if (*(_WORD *)&v17[a7]) {
				if (direction == 8)
					v9 = 0;
				else
					v9 = *(unsigned short *)&v17[direction];
				if (v9)
					v18 = v9 - v16;
				else
					v18 = *((_DWORD *)v8 + 1) - *(_DWORD *)v8 - v16;
				v10 = &v17[v16];
				v11 = (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a7] + screen_x;
				do {
					v12 = frame_width;
					do {
						while (1) {
							v13 = (unsigned char)*v10++;
							if ((v13 & 0x80u) == 0)
								break;
							_LOBYTE(v13) = -(char)v13;
							v11 += v13;
							v12 -= v13;
							if (!v12)
								goto LABEL_20;
						}
						v12 -= v13;
						v14 = v13;
						do {
							v15 = *v10++;
							if (v15) {
								*(v11 - 768) = v19;
								*(v11 - 1) = v19;
								v11[1] = v19;
								v11[768] = v19;
							}
							++v11;
							--v14;
						} while (v14);
					} while (v12);
				LABEL_20:
					v11 += -frame_width - 768;
				} while (&v17[v16 + v18] != v10);
			}
		}
	}
}

void __fastcall CelDrawHdrClrHL(char colour, int screen_x, int screen_y, char *pCelBuff, int frame, int frame_width, int a7, int direction)
{
	char *v8;  // ebx
	int v9;    // eax
	char *v10; // esi
	char *v11; // edi
	int v12;   // edx
	int v13;   // eax
	int v14;   // ecx
	char v15;  // al
	int v16;   // ecx
	char v17;  // al
	int v18;   // [esp+Ch] [ebp-10h]
	char *v19; // [esp+10h] [ebp-Ch]
	int v20;   // [esp+14h] [ebp-8h]
	char v21;  // [esp+18h] [ebp-4h]

	v21 = colour;
	if (pCelBuff) {
		if (gpBuffer) {
			v8 = &pCelBuff[4 * frame];
			v19 = &pCelBuff[*(_DWORD *)v8];
			v18 = *(unsigned short *)&v19[a7];
			if (*(_WORD *)&v19[a7]) {
				if (direction == 8)
					v9 = 0;
				else
					v9 = *(unsigned short *)&v19[direction];
				if (v9)
					v20 = v9 - v18;
				else
					v20 = *((_DWORD *)v8 + 1) - *(_DWORD *)v8 - v18;
				v10 = &v19[v18];
				v11 = (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a7] + screen_x;
				do {
					v12 = frame_width;
					do {
						while (1) {
							v13 = (unsigned char)*v10++;
							if ((v13 & 0x80u) == 0)
								break;
							_LOBYTE(v13) = -(char)v13;
							v11 += v13;
							v12 -= v13;
							if (!v12)
								goto LABEL_28;
						}
						v12 -= v13;
						if (v11 < (char *)gpBufEnd) {
							if (v11 >= (char *)gpBufEnd - 768) {
								v16 = v13;
								do {
									v17 = *v10++;
									if (v17) {
										*(v11 - 768) = v21;
										*(v11 - 1) = v21;
										v11[1] = v21;
									}
									++v11;
									--v16;
								} while (v16);
							} else {
								v14 = v13;
								do {
									v15 = *v10++;
									if (v15) {
										*(v11 - 768) = v21;
										*(v11 - 1) = v21;
										v11[1] = v21;
										v11[768] = v21;
									}
									++v11;
									--v14;
								} while (v14);
							}
						} else {
							v10 += v13;
							v11 += v13;
						}
					} while (v12);
				LABEL_28:
					v11 += -frame_width - 768;
				} while (&v19[v18 + v20] != v10);
			}
		}
	}
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall ENG_set_pixel(int screen_x, int screen_y, UCHAR pixel)
{
	UCHAR *v3; // edi

	if (screen_y >= 0 && screen_y < 640 && screen_x >= 64 && screen_x < 704) {
		v3 = (UCHAR *)gpBuffer + screen_y_times_768[screen_y] + screen_x;
		if (v3 < gpBufEnd)
			*v3 = pixel;
	}
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall engine_draw_pixel(int x, int y)
{
	_BYTE *v2; // eax

	if (dword_52B970) {
		if (!dword_52B99C || x >= 0 && x < 640 && y >= 64 && y < 704) {
			v2 = (unsigned char *)gpBuffer + screen_y_times_768[x] + y;
			goto LABEL_14;
		}
	} else if (!dword_52B99C || y >= 0 && y < 640 && x >= 64 && x < 704) {
		v2 = (unsigned char *)gpBuffer + screen_y_times_768[y] + x;
	LABEL_14:
		if (v2 < gpBufEnd)
			*v2 = gbPixelCol;
		return;
	}
}
// 52B96C: using guessed type char gbPixelCol;
// 52B970: using guessed type int dword_52B970;
// 52B99C: using guessed type int dword_52B99C;
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall DrawLine(int x0, int y0, int x1, int y1, UCHAR col)
{
	int v5;         // ST18_4
	int v6;         // ST2C_4
	int v7;         // ST20_4
	int v8;         // [esp+Ch] [ebp-48h]
	int v9;         // [esp+10h] [ebp-44h]
	int v10;        // [esp+14h] [ebp-40h]
	int v11;        // [esp+18h] [ebp-3Ch]
	signed int v12; // [esp+1Ch] [ebp-38h]
	int v13;        // [esp+20h] [ebp-34h]
	int v14;        // [esp+24h] [ebp-30h]
	int v15;        // [esp+28h] [ebp-2Ch]
	int y;          // [esp+2Ch] [ebp-28h]
	int ya;         // [esp+2Ch] [ebp-28h]
	int yb;         // [esp+2Ch] [ebp-28h]
	int yc;         // [esp+2Ch] [ebp-28h]
	int j;          // [esp+30h] [ebp-24h]
	int i;          // [esp+30h] [ebp-24h]
	int x;          // [esp+34h] [ebp-20h]
	int xa;         // [esp+34h] [ebp-20h]
	int xb;         // [esp+34h] [ebp-20h]
	int xc;         // [esp+34h] [ebp-20h]
	int xd;         // [esp+34h] [ebp-20h]
	int xe;         // [esp+34h] [ebp-20h]
	int xf;         // [esp+34h] [ebp-20h]
	int xg;         // [esp+34h] [ebp-20h]
	int xh;         // [esp+34h] [ebp-20h]
	int v31;        // [esp+38h] [ebp-1Ch]
	int v32;        // [esp+3Ch] [ebp-18h]
	int v33;        // [esp+3Ch] [ebp-18h]
	int v34;        // [esp+3Ch] [ebp-18h]
	signed int v35; // [esp+40h] [ebp-14h]
	signed int v36; // [esp+44h] [ebp-10h]
	int v37;        // [esp+48h] [ebp-Ch]
	int v38;        // [esp+48h] [ebp-Ch]
	int v39;        // [esp+4Ch] [ebp-8h]
	int v40;        // [esp+4Ch] [ebp-8h]
	int v41;        // [esp+50h] [ebp-4h]
	int x2a;        // [esp+5Ch] [ebp+8h]

	v8 = y0;
	v9 = x0;
	gbPixelCol = col;
	dword_52B99C = 0;
	if (x0 < 64 || x0 >= 704)
		dword_52B99C = 1;
	if (x1 < 64 || x1 >= 704)
		dword_52B99C = 1;
	if (y0 < 160 || y0 >= 512)
		dword_52B99C = 1;
	if (y1 < 160 || y1 >= 512)
		dword_52B99C = 1;
	if (x1 - x0 < 0)
		v36 = -1;
	else
		v36 = 1;
	v11 = v36 * (x1 - x0);
	if (y1 - y0 < 0)
		v35 = -1;
	else
		v35 = 1;
	v10 = v35 * (y1 - y0);
	if (v35 == v36)
		v12 = 1;
	else
		v12 = -1;
	if (v11 >= v10) {
		dword_52B970 = 0;
	} else {
		v8 = y0 ^ x0 ^ y0;
		v9 = v8 ^ y0 ^ x0;
		x2a = y1 ^ x1;
		y1 ^= x2a;
		x1 = y1 ^ x2a;
		v5 = v10 ^ v11;
		v10 ^= v5;
		v11 = v10 ^ v5;
		dword_52B970 = 1;
	}
	if (x1 >= v9) {
		x = v9;
		y = v8;
		v32 = x1;
		v13 = y1;
	} else {
		x = x1;
		y = y1;
		v32 = v9;
		v13 = v8;
	}
	v31 = (v11 - 1) / 4;
	v41 = (v11 - 1) % 4; /* (((v11 - 1) >> 31) ^ abs(v11 - 1) & 3) - ((v11 - 1) >> 31) */
	engine_draw_pixel(x, y);
	engine_draw_pixel(v32, v13);
	v14 = 4 * v10 - 2 * v11;
	if (v14 >= 0) {
		v40 = 2 * (v10 - v11);
		v15 = 4 * (v10 - v11);
		v38 = v15 + v11;
		for (i = 0; i < v31; ++i) {
			xe = x + 1;
			v34 = v32 - 1;
			if (v38 <= 0) {
				if (v40 <= v38) {
					y += v12;
					engine_draw_pixel(xe, y);
					x = xe + 1;
					engine_draw_pixel(x, y);
					v13 -= v12;
					engine_draw_pixel(v34, v13);
				} else {
					engine_draw_pixel(xe, y);
					y += v12;
					x = xe + 1;
					engine_draw_pixel(x, y);
					engine_draw_pixel(v34, v13);
					v13 -= v12;
				}
				v32 = v34 - 1;
				engine_draw_pixel(v32, v13);
				v38 += v14;
			} else {
				v6 = v12 + y;
				engine_draw_pixel(xe, v6);
				y = v12 + v6;
				x = xe + 1;
				engine_draw_pixel(x, y);
				v7 = v13 - v12;
				engine_draw_pixel(v34, v7);
				v13 = v7 - v12;
				v32 = v34 - 1;
				engine_draw_pixel(v32, v13);
				v38 += v15;
			}
		}
		if (v41) {
			if (v38 <= 0) {
				if (v40 <= v38) {
					yc = v12 + y;
					xh = x + 1;
					engine_draw_pixel(xh, yc);
					if (v41 > 1)
						engine_draw_pixel(xh + 1, yc);
					if (v41 > 2) {
						if (v40 >= v38)
							engine_draw_pixel(v32 - 1, v13);
						else
							engine_draw_pixel(v32 - 1, v13 - v12);
					}
				} else {
					xg = x + 1;
					engine_draw_pixel(xg, y);
					if (v41 > 1)
						engine_draw_pixel(xg + 1, v12 + y);
					if (v41 > 2)
						engine_draw_pixel(v32 - 1, v13);
				}
			} else {
				yb = v12 + y;
				xf = x + 1;
				engine_draw_pixel(xf, yb);
				if (v41 > 1)
					engine_draw_pixel(xf + 1, v12 + yb);
				if (v41 > 2)
					engine_draw_pixel(v32 - 1, v13 - v12);
			}
		}
	} else {
		v39 = 2 * v10;
		v37 = 4 * v10 - v11;
		for (j = 0; j < v31; ++j) {
			xa = x + 1;
			v33 = v32 - 1;
			if (v37 >= 0) {
				if (v39 <= v37) {
					y += v12;
					engine_draw_pixel(xa, y);
					x = xa + 1;
					engine_draw_pixel(x, y);
					v13 -= v12;
					engine_draw_pixel(v33, v13);
				} else {
					engine_draw_pixel(xa, y);
					y += v12;
					x = xa + 1;
					engine_draw_pixel(x, y);
					engine_draw_pixel(v33, v13);
					v13 -= v12;
				}
				v32 = v33 - 1;
				engine_draw_pixel(v32, v13);
				v37 += v14;
			} else {
				engine_draw_pixel(xa, y);
				x = xa + 1;
				engine_draw_pixel(x, y);
				engine_draw_pixel(v33, v13);
				v32 = v33 - 1;
				engine_draw_pixel(v32, v13);
				v37 += 4 * v10;
			}
		}
		if (v41) {
			if (v37 >= 0) {
				if (v39 <= v37) {
					ya = v12 + y;
					xd = x + 1;
					engine_draw_pixel(xd, ya);
					if (v41 > 1)
						engine_draw_pixel(xd + 1, ya);
					if (v41 > 2)
						engine_draw_pixel(v32 - 1, v13 - v12);
				} else {
					xc = x + 1;
					engine_draw_pixel(xc, y);
					if (v41 > 1)
						engine_draw_pixel(xc + 1, v12 + y);
					if (v41 > 2)
						engine_draw_pixel(v32 - 1, v13);
				}
			} else {
				xb = x + 1;
				engine_draw_pixel(xb, y);
				if (v41 > 1)
					engine_draw_pixel(xb + 1, y);
				if (v41 > 2)
					engine_draw_pixel(v32 - 1, v13);
			}
		}
	}
}
// 52B96C: using guessed type char gbPixelCol;
// 52B970: using guessed type int dword_52B970;
// 52B99C: using guessed type int dword_52B99C;

int __fastcall GetDirection(int x1, int y1, int x2, int y2)
{
	int mx, my;
	int md, ny;

	mx = x2 - x1;
	my = y2 - y1;

	if (mx >= 0) {
		if (my >= 0) {
			md = DIR_S;
			if (2 * mx < my)
				md = DIR_SW;
		} else {
			my = -my;
			md = DIR_E;
			if (2 * mx < my)
				md = DIR_NE;
		}
		if (2 * my < mx)
			return DIR_SE;
	} else {
		ny = -mx;
		if (my >= 0) {
			md = DIR_W;
			if (2 * ny < my)
				md = DIR_SW;
		} else {
			my = -my;
			md = DIR_N;
			if (2 * ny < my)
				md = DIR_NE;
		}
		if (2 * my < ny)
			return DIR_NW;
	}

	return md;
}

void __fastcall SetRndSeed(int s)
{
	SeedCount = 0;
	sglGameSeed = s;
	orgseed = s;
}
// 52B974: using guessed type int orgseed;
// 52B97C: using guessed type int sglGameSeed;
// 52B998: using guessed type int SeedCount;

int __cdecl GetRndSeed()
{
	SeedCount++;
	sglGameSeed = 0x015A4E35 * sglGameSeed + 1;
	return abs(sglGameSeed);
}
// 52B97C: using guessed type int sglGameSeed;
// 52B998: using guessed type int SeedCount;

int __fastcall random(BYTE idx, int v)
{
	if (v <= 0)
		return 0;
	if (v >= 0xFFFF)
		return GetRndSeed() % v;
	return (GetRndSeed() >> 16) % v;
}

#ifndef _MSC_VER
__attribute__((constructor))
#endif
static void
engine_c_init(void)
{
	mem_init_mutex();
	mem_atexit_mutex();
}

SEG_ALLOCATE(SEGMENT_C_INIT)
_PVFV engine_c_init_funcs[] = { &engine_c_init };

void __cdecl mem_init_mutex()
{
	InitializeCriticalSection(&sgMemCrit);
}

void __cdecl mem_atexit_mutex()
{
	atexit(mem_free_mutex);
}

void __cdecl mem_free_mutex(void)
{
	DeleteCriticalSection(&sgMemCrit);
}

unsigned char *__fastcall DiabloAllocPtr(int dwBytes)
{
	BYTE *buf;

	EnterCriticalSection(&sgMemCrit);
	buf = (BYTE *)SMemAlloc(dwBytes, "C:\\Src\\Diablo\\Source\\ENGINE.CPP", 2236, 0);
	LeaveCriticalSection(&sgMemCrit);

	if (buf == NULL) {
		ErrDlg(IDD_DIALOG2, GetLastError(), "C:\\Src\\Diablo\\Source\\ENGINE.CPP", 2269);
	}

	return buf;
}

void __fastcall mem_free_dbg(void *p)
{
	if (p) {
		EnterCriticalSection(&sgMemCrit);
		SMemFree(p, "C:\\Src\\Diablo\\Source\\ENGINE.CPP", 2317, 0);
		LeaveCriticalSection(&sgMemCrit);
	}
}

BYTE *__fastcall LoadFileInMem(char *pszName, int *pdwFileLen)
{
	HANDLE file;
	BYTE *buf;
	int fileLen;

	WOpenFile(pszName, &file, FALSE);
	fileLen = WGetFileSize(file, NULL);

	if (pdwFileLen)
		*pdwFileLen = fileLen;

	if (!fileLen)
		TermMsg("Zero length SFILE:\n%s", pszName);

	buf = (BYTE *)DiabloAllocPtr(fileLen);

	WReadFile(file, buf, fileLen);
	WCloseFile(file);

	return buf;
}

void __fastcall LoadFileWithMem(char *pszName, void *buf)
{
	char *v2; // ebx
	char *v3; // edi
	int v4;   // esi
	HANDLE a1; // [esp+Ch] [ebp-4h]

	v2 = (char *)buf;
	v3 = pszName;
	if (!buf)
		TermMsg("LoadFileWithMem(NULL):\n%s", pszName);
	WOpenFile(v3, &a1, 0);
	v4 = WGetFileSize(a1, 0);
	if (!v4)
		TermMsg("Zero length SFILE:\n%s", v3);
	WReadFile(a1, v2, v4);
	WCloseFile(a1);
}

void __fastcall Cl2ApplyTrans(unsigned char *p, unsigned char *ttbl, int last_frame)
{
	int v3;            // eax
	int v4;            // edi
	int v5;            // esi
	unsigned char *v6; // eax
	char v7;           // bl
	unsigned char v8;  // bl
	int v9;            // edi
	int i;             // [esp+0h] [ebp-4h]

	v3 = 1;
	for (i = 1; i <= last_frame; ++i) {
		v4 = *(_DWORD *)&p[4 * v3];
		v5 = *(_DWORD *)&p[4 * v3 + 4] - v4 - 10;
		v6 = &p[v4 + 10];
		while (v5) {
			v7 = *v6++;
			--v5;
			if (v7 < 0) {
				v8 = -v7;
				if ((char)v8 <= 65) {
					v5 -= (char)v8;
					if (v8) {
						v9 = v8;
						do {
							*v6 = ttbl[*v6];
							++v6;
							--v9;
						} while (v9);
					}
				} else {
					--v5;
					*v6 = ttbl[*v6];
					++v6;
				}
			}
		}
		v3 = i + 1;
	}
}

void __fastcall Cl2DecodeFrm1(int x, int y, char *pCelBuff, int nCel, int width, int dir1, int dir2)
{
	char *v8;        // edx
	char *v9;        // ecx
	int v10;         // ecx
	int v11;         // eax
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(char **)&pCelBuff[4 * nCel];
				pCelBuffa = v9;
				v10 = (int)&v9[(_DWORD)v8];
				if (*(_WORD *)(v10 + dir1)) {
					if (dir2 == 8 || (v11 = *(unsigned short *)(v10 + dir2), !*(_WORD *)(v10 + dir2)))
						v11 = *((_DWORD *)v8 + nCel + 1) - (_DWORD)pCelBuffa;
					Cl2DecDatFrm1(
					    (char *)gpBuffer + screen_y_times_768[y - 16 * dir1] + x,
					    (char *)(*(unsigned short *)(v10 + dir1) + v10),
					    v11 - *(unsigned short *)(v10 + dir1),
					    width);
				}
			}
		}
	}
}

void __fastcall Cl2DecDatFrm1(char *buffer, char *frame_content, int a3, int width) /* fix */
{
	char *v4; // esi
	char *v5; // edi
	int v6;   // eax
	int v7;   // ebx
	int v8;   // ecx
	char v9;  // dl
	char v10; // dl
	int v11;  // edx

	v4 = frame_content;
	v5 = buffer;
	v6 = 0;
	v7 = width;
	v8 = a3;
	do {
		_LOBYTE(v6) = *v4++;
		--v8;
		if ((v6 & 0x80u) == 0) {
			do {
				if (v6 <= v7) {
					v11 = v6;
					v5 += v6;
					v6 = 0;
				} else {
					v11 = v7;
					v5 += v7;
					v6 -= v7;
				}
				v7 -= v11;
				if (!v7) {
					v7 = width;
					v5 = &v5[-width - 768];
				}
			} while (v6);
		} else {
			_LOBYTE(v6) = -(char)v6;
			if ((char)v6 <= 65) {
				v8 -= v6;
				v7 -= v6;
				do {
					v10 = *v4++;
					*v5 = v10;
					--v6;
					++v5;
				} while (v6);
			} else {
				_LOBYTE(v6) = v6 - 65;
				--v8;
				v9 = *v4++;
				v7 -= v6;
				do {
					*v5 = v9;
					--v6;
					++v5;
				} while (v6);
			}
			if (!v7) {
				v7 = width;
				v5 = &v5[-width - 768];
			}
		}
	} while (v8);
}

void __fastcall Cl2DecodeFrm2(char colour, int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a7, int a8)
{
	int v8;   // ebx
	char *v9; // edx
	int v10;  // eax
	int v11;  // [esp+Ch] [ebp-8h]

	v11 = screen_x;
	if (gpBuffer) {
		if (pCelBuff) {
			if (nCel > 0) {
				v8 = *(_DWORD *)&pCelBuff[4 * nCel];
				v9 = &pCelBuff[v8];
				if (*(_WORD *)&pCelBuff[v8 + a7]) {
					if (a8 == 8 || (v10 = *(unsigned short *)&v9[a8], !*(_WORD *)&v9[a8]))
						v10 = *(_DWORD *)&pCelBuff[4 * nCel + 4] - v8;
					Cl2DecDatFrm2(
					    (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a7] + v11,
					    &v9[*(unsigned short *)&pCelBuff[v8 + a7]],
					    v10 - *(unsigned short *)&pCelBuff[v8 + a7],
					    frame_width,
					    colour);
				}
			}
		}
	}
}

void __fastcall Cl2DecDatFrm2(char *buffer, char *frame_content, int a3, int frame_width, char colour)
{
	char *v5; // esi
	char *v6; // edi
	int v7;   // eax
	int v8;   // ebx
	int v9;   // ecx
	char v10; // dl
	char v11; // dh
	char v12; // dh
	int v13;  // edx

	v5 = frame_content;
	v6 = buffer;
	v7 = 0;
	v8 = frame_width;
	v9 = a3;
	v10 = colour;
	do {
		_LOBYTE(v7) = *v5++;
		--v9;
		if ((v7 & 0x80u) != 0) {
			_LOBYTE(v7) = -(char)v7;
			if ((char)v7 <= 65) {
				v9 -= v7;
				v8 -= v7;
				do {
					v12 = *v5++;
					if (v12) {
						*(v6 - 1) = v10;
						v6[1] = v10;
						*(v6 - 768) = v10;
						v6[768] = v10;
					}
					--v7;
					++v6;
				} while (v7);
				goto LABEL_12;
			}
			_LOBYTE(v7) = v7 - 65;
			--v9;
			v11 = *v5++;
			if (v11) {
				*(v6 - 1) = v10;
				v8 -= v7;
				v6[v7] = v10;
				do {
					*(v6 - 768) = v10;
					v6[768] = v10;
					--v7;
					++v6;
				} while (v7);
			LABEL_12:
				if (!v8) {
					v8 = frame_width;
					v6 = &v6[-frame_width - 768];
				}
				continue;
			}
		}
		do {
			if (v7 <= v8) {
				v13 = v7;
				v6 += v7;
				v7 = 0;
			} else {
				v13 = v8;
				v6 += v8;
				v7 -= v8;
			}
			v8 -= v13;
			if (!v8) {
				v8 = frame_width;
				v6 = &v6[-frame_width - 768];
			}
		} while (v7);
		v10 = colour;
	} while (v9);
}

void __fastcall Cl2DecodeFrm3(int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a6, int a7, char a8)
{
	char *v8;        // edi
	int v9;          // ebx
	char *v10;       // esi
	int v11;         // eax
	int v12;         // eax
	char *v13;       // esi
	int v14;         // edi
	int v15;         // eax
	int v16;         // eax
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(_DWORD *)&pCelBuff[4 * nCel];
				v10 = &pCelBuff[v9];
				v11 = *(unsigned short *)&pCelBuff[v9 + a6];
				pCelBuffa = (char *)*(unsigned short *)&pCelBuff[v9 + a6];
				if (v11) {
					if (a7 == 8 || (v12 = *(unsigned short *)&v10[a7], !*(_WORD *)&v10[a7]))
						v12 = *(_DWORD *)&v8[4 * nCel + 4] - v9;
					v13 = &v10[(_DWORD)pCelBuffa];
					v14 = v12 - (_DWORD)pCelBuffa;
					v15 = -(light4flag != 0);
					_LOWORD(v15) = v15 & 0xF400;
					v16 = v15 + 4096;
					if (a8 == 2)
						v16 += 256;
					if (a8 >= 4)
						v16 = v16 + (a8 << 8) - 256;
					Cl2DecDatLightTbl1(
					    (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a6] + screen_x,
					    v13,
					    v14,
					    frame_width,
					    &pLightTbl[v16]);
				}
			}
		}
	}
}
// 525728: using guessed type int light4flag;

void __fastcall Cl2DecDatLightTbl1(char *a1, char *a2, int a3, int a4, char *unused_lindex) /* check 5th arg */
{
	char *v5; // esi
	char *v6; // edi
	int v7;   // ebx
	int v8;   // ecx
	int v9;   // eax
	int v10;  // edx
	char v11; // dl

	v5 = a2;
	v6 = a1;
	v7 = a4;
	v8 = a3;
	sgnWidth = a4;
	v9 = 0;
	v10 = 0;
	do {
		_LOBYTE(v9) = *v5++;
		--v8;
		if ((v9 & 0x80u) == 0) {
			do {
				if (v9 <= v7) {
					v10 = v9;
					v6 += v9;
					v9 = 0;
				} else {
					v10 = v7;
					v6 += v7;
					v9 -= v7;
				}
				v7 -= v10;
				if (!v7) {
					v7 = sgnWidth;
					v6 = &v6[-sgnWidth - 768];
				}
			} while (v9);
		} else {
			_LOBYTE(v9) = -(char)v9;
			if ((char)v9 <= 65) {
				v8 -= v9;
				v7 -= v9;
				do {
					_LOBYTE(v10) = *v5++;
					*v6 = unused_lindex[v10];
					--v9;
					++v6;
				} while (v9);
			} else {
				_LOBYTE(v9) = v9 - 65;
				--v8;
				v7 -= v9;
				_LOBYTE(v10) = *v5++;
				v11 = unused_lindex[v10];
				do {
					*v6 = v11;
					--v9;
					++v6;
				} while (v9);
			}
			if (!v7) {
				v7 = sgnWidth;
				v6 = &v6[-sgnWidth - 768];
			}
		}
	} while (v8);
}
// 52B978: using guessed type int sgnWidth;

void __fastcall Cl2DecodeLightTbl(int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a6, int a7)
{
	int v7;          // esi
	char *v8;        // edi
	int v9;          // ebx
	char *v10;       // edx
	int v11;         // eax
	int v12;         // eax
	int v13;         // eax
	char *v14;       // edx
	char *v15;       // ecx
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	v7 = screen_y;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(_DWORD *)&pCelBuff[4 * nCel];
				v10 = &pCelBuff[v9];
				v11 = *(unsigned short *)&pCelBuff[v9 + a6];
				pCelBuffa = (char *)*(unsigned short *)&pCelBuff[v9 + a6];
				if (v11) {
					if (a7 == 8 || (v12 = *(unsigned short *)&v10[a7], !*(_WORD *)&v10[a7]))
						v12 = *(_DWORD *)&v8[4 * nCel + 4] - v9;
					v13 = v12 - (_DWORD)pCelBuffa;
					v14 = &v10[(_DWORD)pCelBuffa];
					v15 = (char *)gpBuffer + screen_y_times_768[v7 - 16 * a6] + screen_x;
					if (light_table_index)
						Cl2DecDatLightTbl1(
						    v15,
						    v14,
						    v13,
						    frame_width,
						    &pLightTbl[256 * light_table_index]);
					else
						Cl2DecDatFrm1(v15, v14, v13, frame_width);
				}
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall Cl2DecodeFrm4(int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a6, int a7)
{
	int v7;          // ebx
	char *v8;        // edx
	char *v9;        // ecx
	int v10;         // ecx
	int v11;         // eax
	int v12;         // [esp+Ch] [ebp-4h]
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	v7 = screen_y;
	v12 = screen_x;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(char **)&pCelBuff[4 * nCel];
				pCelBuffa = v9;
				v10 = (int)&v9[(_DWORD)v8];
				if (*(_WORD *)(v10 + a6)) {
					if (a7 == 8 || (v11 = *(unsigned short *)(v10 + a7), !*(_WORD *)(v10 + a7)))
						v11 = *(_DWORD *)&v8[4 * nCel + 4] - (_DWORD)pCelBuffa;
					Cl2DecDatFrm4(
					    (char *)gpBuffer + screen_y_times_768[v7 - 16 * a6] + v12,
					    (char *)(*(unsigned short *)(v10 + a6) + v10),
					    v11 - *(unsigned short *)(v10 + a6),
					    frame_width);
				}
			}
		}
	}
}

void __fastcall Cl2DecDatFrm4(char *buffer, char *a2, int a3, int frame_width)
{
	char *v4; // esi
	char *v5; // edi
	int v6;   // eax
	int v7;   // ebx
	int v8;   // ecx
	char v9;  // dl
	char v10; // dl
	int v11;  // edx

	v4 = a2;
	v5 = buffer;
	v6 = 0;
	v7 = frame_width;
	v8 = a3;
	do {
		_LOBYTE(v6) = *v4++;
		--v8;
		if ((v6 & 0x80u) != 0) {
			_LOBYTE(v6) = -(char)v6;
			if ((char)v6 <= 65) {
				v8 -= v6;
				if (v5 < (char *)gpBufEnd) {
					v7 -= v6;
					do {
						v10 = *v4++;
						*v5 = v10;
						--v6;
						++v5;
					} while (v6);
					goto LABEL_12;
				}
				v4 += v6;
			} else {
				_LOBYTE(v6) = v6 - 65;
				--v8;
				v9 = *v4++;
				if (v5 < (char *)gpBufEnd) {
					v7 -= v6;
					do {
						*v5 = v9;
						--v6;
						++v5;
					} while (v6);
				LABEL_12:
					if (!v7) {
						v7 = frame_width;
						v5 = &v5[-frame_width - 768];
					}
					continue;
				}
			}
		}
		do {
			if (v6 <= v7) {
				v11 = v6;
				v5 += v6;
				v6 = 0;
			} else {
				v11 = v7;
				v5 += v7;
				v6 -= v7;
			}
			v7 -= v11;
			if (!v7) {
				v7 = frame_width;
				v5 = &v5[-frame_width - 768];
			}
		} while (v6);
	} while (v8);
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cl2DecodeClrHL(char colour, int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a7, int a8)
{
	int v8;   // ebx
	char *v9; // edx
	int v10;  // ecx
	int v11;  // eax
	int v12;  // [esp+Ch] [ebp-8h]
	char a5;  // [esp+10h] [ebp-4h]

	v12 = screen_x;
	a5 = colour;
	if (gpBuffer) {
		if (pCelBuff) {
			if (nCel > 0) {
				v8 = *(_DWORD *)&pCelBuff[4 * nCel];
				v9 = &pCelBuff[v8];
				v10 = *(unsigned short *)&pCelBuff[v8 + a7];
				if (*(_WORD *)&pCelBuff[v8 + a7]) {
					if (a8 == 8 || (v11 = *(unsigned short *)&v9[a8], !*(_WORD *)&v9[a8]))
						v11 = *(_DWORD *)&pCelBuff[4 * nCel + 4] - v8;
					gpBufEnd -= 768;
					Cl2DecDatClrHL(
					    (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a7] + v12,
					    &v9[v10],
					    v11 - v10,
					    frame_width,
					    a5);
					gpBufEnd += 768;
				}
			}
		}
	}
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cl2DecDatClrHL(char *dst_buf, char *frame_content, int a3, int frame_width, char colour)
{
	char *v5; // esi
	char *v6; // edi
	int v7;   // eax
	int v8;   // ebx
	int v9;   // ecx
	char v10; // dl
	char v11; // dh
	char v12; // dh
	int v13;  // edx

	v5 = frame_content;
	v6 = dst_buf;
	v7 = 0;
	v8 = frame_width;
	v9 = a3;
	v10 = colour;
	do {
		_LOBYTE(v7) = *v5++;
		--v9;
		if ((v7 & 0x80u) != 0) {
			_LOBYTE(v7) = -(char)v7;
			if ((char)v7 <= 65) {
				v9 -= v7;
				if (v6 < (char *)gpBufEnd) {
					v8 -= v7;
					do {
						v12 = *v5++;
						if (v12) {
							*(v6 - 1) = v10;
							v6[1] = v10;
							*(v6 - 768) = v10;
							v6[768] = v10;
						}
						--v7;
						++v6;
					} while (v7);
					goto LABEL_15;
				}
				v5 += v7;
			} else {
				_LOBYTE(v7) = v7 - 65;
				--v9;
				v11 = *v5++;
				if (v11 && v6 < (char *)gpBufEnd) {
					*(v6 - 1) = v10;
					v8 -= v7;
					v6[v7] = v10;
					do {
						*(v6 - 768) = v10;
						v6[768] = v10;
						--v7;
						++v6;
					} while (v7);
				LABEL_15:
					if (!v8) {
						v8 = frame_width;
						v6 = &v6[-frame_width - 768];
					}
					continue;
				}
			}
		}
		do {
			if (v7 <= v8) {
				v13 = v7;
				v6 += v7;
				v7 = 0;
			} else {
				v13 = v8;
				v6 += v8;
				v7 -= v8;
			}
			v8 -= v13;
			if (!v8) {
				v8 = frame_width;
				v6 = &v6[-frame_width - 768];
			}
		} while (v7);
		v10 = colour;
	} while (v9);
}
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cl2DecodeFrm5(int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a6, int a7, char a8)
{
	char *v8;        // edi
	int v9;          // ebx
	char *v10;       // esi
	int v11;         // eax
	int v12;         // eax
	char *v13;       // esi
	int v14;         // edi
	int v15;         // eax
	int v16;         // eax
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(_DWORD *)&pCelBuff[4 * nCel];
				v10 = &pCelBuff[v9];
				v11 = *(unsigned __int16 *)&pCelBuff[v9 + a6];
				pCelBuffa = (char *)*(unsigned __int16 *)&pCelBuff[v9 + a6];
				if (v11) {
					if (a7 == 8 || (v12 = *(unsigned __int16 *)&v10[a7], !*(_WORD *)&v10[a7]))
						v12 = *(_DWORD *)&v8[4 * nCel + 4] - v9;
					v13 = &v10[(_DWORD)pCelBuffa];
					v14 = v12 - (_DWORD)pCelBuffa;
					v15 = -(light4flag != 0);
					_LOWORD(v15) = v15 & 0xF400;
					v16 = v15 + 4096;
					if (a8 == 2)
						v16 += 256;
					if (a8 >= 4)
						v16 = v16 + (a8 << 8) - 256;
					Cl2DecDatLightTbl2(
					    (char *)gpBuffer + screen_y_times_768[screen_y - 16 * a6] + screen_x,
					    v13,
					    v14,
					    frame_width,
					    &pLightTbl[v16]);
				}
			}
		}
	}
}
// 525728: using guessed type int light4flag;

void __fastcall Cl2DecDatLightTbl2(char *dst_buf, char *a2, int a3, int frame_width, char *a5) /* check 5th arg */
{
	char *v5; // esi
	char *v6; // edi
	int v7;   // ebx
	int v8;   // ecx
	int v9;   // eax
	int v10;  // edx
	char v11; // dl

	v5 = a2;
	v6 = dst_buf;
	v7 = frame_width;
	v8 = a3;
	sgnWidth = frame_width;
	v9 = 0;
	v10 = 0;
	do {
		_LOBYTE(v9) = *v5++;
		--v8;
		if ((v9 & 0x80u) != 0) {
			_LOBYTE(v9) = -(char)v9;
			if ((char)v9 <= 65) {
				v8 -= v9;
				if (v6 < (char *)gpBufEnd) {
					v7 -= v9;
					do {
						_LOBYTE(v10) = *v5++;
						*v6 = a5[v10];
						--v9;
						++v6;
					} while (v9);
					goto LABEL_12;
				}
				v5 += v9;
			} else {
				_LOBYTE(v9) = v9 - 65;
				--v8;
				_LOBYTE(v10) = *v5++;
				v11 = a5[v10];
				if (v6 < (char *)gpBufEnd) {
					v7 -= v9;
					do {
						*v6 = v11;
						--v9;
						++v6;
					} while (v9);
				LABEL_12:
					if (!v7) {
						v7 = sgnWidth;
						v6 = &v6[-sgnWidth - 768];
					}
					continue;
				}
			}
		}
		do {
			if (v9 <= v7) {
				v10 = v9;
				v6 += v9;
				v9 = 0;
			} else {
				v10 = v7;
				v6 += v7;
				v9 -= v7;
			}
			v7 -= v10;
			if (!v7) {
				v7 = sgnWidth;
				v6 = &v6[-sgnWidth - 768];
			}
		} while (v9);
	} while (v8);
}
// 52B978: using guessed type int sgnWidth;
// 69CF0C: using guessed type int gpBufEnd;

void __fastcall Cl2DecodeFrm6(int screen_x, int screen_y, char *pCelBuff, int nCel, int frame_width, int a6, int a7)
{
	int v7;          // esi
	char *v8;        // edi
	int v9;          // ebx
	char *v10;       // edx
	int v11;         // eax
	int v12;         // eax
	int v13;         // eax
	char *v14;       // edx
	char *v15;       // ecx
	char *pCelBuffa; // [esp+18h] [ebp+8h]

	v7 = screen_y;
	if (gpBuffer) {
		v8 = pCelBuff;
		if (pCelBuff) {
			if (nCel > 0) {
				v9 = *(_DWORD *)&pCelBuff[4 * nCel];
				v10 = &pCelBuff[v9];
				v11 = *(unsigned short *)&pCelBuff[v9 + a6];
				pCelBuffa = (char *)*(unsigned short *)&pCelBuff[v9 + a6];
				if (v11) {
					if (a7 == 8 || (v12 = *(unsigned short *)&v10[a7], !*(_WORD *)&v10[a7]))
						v12 = *(_DWORD *)&v8[4 * nCel + 4] - v9;
					v13 = v12 - (_DWORD)pCelBuffa;
					v14 = &v10[(_DWORD)pCelBuffa];
					v15 = (char *)gpBuffer + screen_y_times_768[v7 - 16 * a6] + screen_x;
					if (light_table_index)
						Cl2DecDatLightTbl2(v15, v14, v13, frame_width, &pLightTbl[256 * light_table_index]);
					else
						Cl2DecDatFrm4(v15, v14, v13, frame_width);
				}
			}
		}
	}
}
// 69BEF8: using guessed type int light_table_index;

void __fastcall PlayInGameMovie(char *pszMovie)
{
	PaletteFadeOut(8);
	play_movie(pszMovie, 0);
	ClearScreenBuffer();
	drawpanflag = 255;
	scrollrt_draw_game_screen(1);
	PaletteFadeIn(8);
	drawpanflag = 255;
}
// 52571C: using guessed type int drawpanflag;