(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2008 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

unit uMisc;

interface

uses uConsts, SDLh, uFloat, GL;

{$INCLUDE options.inc}

var

	isCursorVisible : boolean = false;

	isTerminated    : boolean = false;

	isInLag         : boolean = false;

	isPaused        : boolean = false;

	isSoundEnabled  : boolean = true;

	isMusicEnabled  : boolean = false;

	isSEBackup      : boolean = true;

	isInMultiShoot  : boolean = false;

	isSpeed         : boolean = false;

	fastUntilLag    : boolean = false;

	GameState     : TGameState = Low(TGameState);

	GameType      : TGameType = gmtLocal;

	GameFlags     : Longword = 0;

	TurnTimeLeft  : Longword = 0;

	cSuddenDTurns : LongInt = 15;

	cDamagePercent : LongInt = 100;

	cTemplateFilter : LongInt = 0;

	cHedgehogTurnTime: Longword = 45000;

	cMaxAIThinkTime  : Longword = 9000;

	cCloudsNumber    : LongInt = 9;

	cScreenWidth     : LongInt = 1024;

	cScreenHeight    : LongInt = 768;

	cInitWidth       : LongInt = 1024;

	cInitHeight      : LongInt = 768;

	cBits            : LongInt = 16;

	cBitsStr         : string[2] = '16';

	cTagsMask        : byte = 7;

	cWaterLine       : LongInt = LAND_HEIGHT;

	cVisibleWater    : LongInt = 128;

	cGearScrEdgesDist: LongInt = 240;

	cCursorEdgesDist : LongInt = 100;

	cTeamHealthWidth : LongInt = 128;

	cAltDamage       : boolean = true;

	GameTicks     : LongWord = 0;

	cSkyColor     : Longword = 0;

	cWhiteColor   : Longword = $FFFFFFFF;

	cColorNearBlack       : Longword = $FF000010;

	cExplosionBorderColor : LongWord = $808080;

	cShowFPS      : boolean = true;

	cCaseFactor   : Longword = 5;  {0..9}

	cLandAdditions: Longword = 4;

	cFullScreen   : boolean = false;

	cReducedQuality : boolean = false;

	cLocaleFName  : shortstring = 'en.txt';

	cSeed         : shortstring = '';

	cInitVolume   : LongInt = 128;

	cVolumeDelta  : LongInt = 0;

	cTimerInterval   : Longword = 5;

	cHasFocus     : boolean = true;

	cInactDelay   : Longword = 1250;

	bBetweenTurns: boolean = false;

	cHealthDecrease: LongWord = 0;

	bWaterRising   : Boolean = false;

{$WARNINGS OFF}

	cAirPlaneSpeed: hwFloat = (isNegative: false; QWordValue:   3006477107); // 1.4

	cBombsSpeed   : hwFloat = (isNegative: false; QWordValue:    429496729);

{$WARNINGS ON}

var

	cSendEmptyPacketTime : LongWord = 2000;

	cSendCursorPosTime   : LongWord = 50;

	ShowCrosshair  : boolean;

	cDrownSpeed,

	cMaxWindSpeed,

	cWindSpeed,

	cGravity: hwFloat;

	cDamageModifier: hwFloat;

	cLaserSighting: boolean;

	flagMakeCapture: boolean = false;

	InitStepsFlags: Longword = 0;

	RealTicks: Longword = 0;

	AttackBar: LongInt = 0; // 0 - none, 1 - just bar at the right-down corner, 2 - like in WWP

function hwSign(r: hwFloat): LongInt;

function Min(a, b: LongInt): LongInt;

function Max(a, b: LongInt): LongInt;

procedure OutError(Msg: String; isFatalError: boolean);

procedure TryDo(Assert: boolean; Msg: string; isFatal: boolean);

procedure SDLTry(Assert: boolean; isFatal: boolean);

function IntToStr(n: LongInt): shortstring;

function FloatToStr(n: hwFloat): shortstring;

function DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;

function DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;

function DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;

procedure AdjustColor(var Color: Longword);

{$IFDEF DEBUGFILE}

procedure AddFileLog(s: shortstring);

function RectToStr(Rect: TSDL_Rect): shortstring;

{$ENDIF}

procedure SetKB(n: Longword);

procedure SendKB;

procedure SetLittle(var r: hwFloat);

procedure SendStat(sit: TStatInfoType; s: shortstring);

function  Str2PChar(const s: shortstring): PChar;

function NewTexture(width, height: Longword; buf: Pointer): PTexture;

function  Surface2Tex(surf: PSDL_Surface): PTexture;

procedure FreeTexture(tex: PTexture);

function  toPowerOf2(i: Longword): Longword;

function DecodeBase64(s: shortstring): shortstring;

procedure MakeScreenshot(s: shortstring);

function modifyDamage(dmg: Longword): Longword;

var CursorPoint: TPoint;

    TargetPoint: TPoint = (X: NoPointX; Y: 0);

implementation

var KBnum: Longword = 0;

{$IFDEF DEBUGFILE}

var f: textfile;

{$ENDIF}

function hwSign(r: hwFloat): LongInt;

begin

if r.isNegative then hwSign:= -1 else hwSign:= 1

end;

function Min(a, b: LongInt): LongInt;

begin

if a < b then Min:= a else Min:= b

end;

function Max(a, b: LongInt): LongInt;

begin

if a > b then Max:= a else Max:= b

end;

procedure OutError(Msg: String; isFatalError: boolean);

begin

{$IFDEF DEBUGFILE}AddFileLog(Msg);{$ENDIF}

WriteLnToConsole(Msg);

if isFatalError then

   begin

   SendIPC('E' + GetLastConsoleLine);

   SDL_Quit;

   halt(1)

   end

end;

procedure TryDo(Assert: boolean; Msg: string; isFatal: boolean);

begin

if not Assert then OutError(Msg, isFatal)

end;

procedure SDLTry(Assert: boolean; isFatal: boolean);

begin

if not Assert then OutError(SDL_GetError, isFatal)

end;

procedure AdjustColor(var Color: Longword);

begin

Color:= SDL_MapRGB(PixelFormat, (Color shr 16) and $FF, (Color shr 8) and $FF, Color and $FF)

end;

function IntToStr(n: LongInt): shortstring;

begin

str(n, IntToStr)

end;

function FloatToStr(n: hwFloat): shortstring;

begin

FloatToStr:= cstr(n) + '_' + inttostr(Lo(n.QWordValue))

end;

function DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2Angle:= arctan2(dY, dX) * 180 / pi

end;

function DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;

const _16divPI: Extended = 16/pi;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2Angle32:= trunc(arctan2(dY, dX) * _16divPI) and $1f

end;

function DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;

const MaxAngleDivPI: Extended = cMaxAngle/pi;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2AttackAngle:= trunc(arctan2(dY, dX) * MaxAngleDivPI)

end;

procedure SetKB(n: Longword);

begin

KBnum:= n

end;

procedure SendKB;

var s: shortstring;

begin

if KBnum <> 0 then

   begin

   s:= 'K' + inttostr(KBnum);

   SendIPCRaw(@s, Length(s) + 1)

   end

end;

procedure SetLittle(var r: hwFloat);

begin

r:= SignAs(cLittle, r)

end;

procedure SendStat(sit: TStatInfoType; s: shortstring);

const stc: array [TStatInfoType] of char = 'rDkKH';

begin

SendIPC('i' + stc[sit] + s)

end;

function Str2PChar(const s: shortstring): PChar;

const CharArray: array[byte] of Char = '';

begin

CharArray:= s;

CharArray[Length(s)]:= #0;

Str2PChar:= @CharArray

end;

function isPowerOf2(i: Longword): boolean;

begin

if i = 0 then exit(true);

while (i and 1) = 0 do i:= i shr 1;

isPowerOf2:= (i = 1)

end;

function toPowerOf2(i: Longword): Longword;

begin

toPowerOf2:= 1;

while (toPowerOf2 < i) do toPowerOf2:= toPowerOf2 shl 1

end;

function NewTexture(width, height: Longword; buf: Pointer): PTexture;

begin

new(NewTexture);

NewTexture^.w:= width;

NewTexture^.h:= height;

glGenTextures(1, @NewTexture^.id);

glBindTexture(GL_TEXTURE_2D, NewTexture^.id);

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, buf);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)

end;

function Surface2Tex(surf: PSDL_Surface): PTexture;

var mode: LongInt;

begin

new(Surface2Tex);

Surface2Tex^.w:= surf^.w;

Surface2Tex^.h:= surf^.h;

if (surf^.format^.BytesPerPixel = 3) then mode:= GL_RGB else

if (surf^.format^.BytesPerPixel = 4) then mode:= GL_RGBA else

   begin

   TryDo(false, 'Surface2Tex: BytesPerPixel not in [3, 4]', true);

   Surface2Tex^.id:= 0;

   exit

   end;

glGenTextures(1, @Surface2Tex^.id);

glBindTexture(GL_TEXTURE_2D, Surface2Tex^.id);

if SDL_MustLock(surf) then

   SDLTry(SDL_LockSurface(surf) >= 0, true);

if not (isPowerOf2(Surf^.w) and isPowerOf2(Surf^.h)) then

if SDL_MustLock(surf) then

   SDL_UnlockSurface(surf);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)

end;

procedure FreeTexture(tex: PTexture);

begin

glDeleteTextures(1, @tex^.id);

dispose(tex)

end;

function DecodeBase64(s: shortstring): shortstring;

const table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

var i, t, c: Longword;

begin

c:= 0;

for i:= 1 to Length(s) do

	begin

	t:= Pos(s[i], table);

	if s[i] = '=' then inc(c);

	if t > 0 then byte(s[i]):= t - 1 else byte(s[i]):= 0

	end;

i:= 1;

t:= 1;

while i <= length(s) do

	begin

	DecodeBase64[t    ]:= char((byte(s[i    ]) shl 2) or (byte(s[i + 1]) shr 4));

	DecodeBase64[t + 1]:= char((byte(s[i + 1]) shl 4) or (byte(s[i + 2]) shr 2));

	DecodeBase64[t + 2]:= char((byte(s[i + 2]) shl 6) or (byte(s[i + 3])      ));

	inc(t, 3);

	inc(i, 4)

	end;

if c < 3 then t:= t - c;

byte(DecodeBase64[0]):= t - 1

end;

const GL_BGR = $80E0; // some opengl headers don't have that const (?)

procedure MakeScreenshot(s: shortstring);

const head: array[0..8] of Word = (0, 2, 0, 0, 0, 0, 0, 0, 24);

var p: Pointer;

	size: Longword;

	f: file;

begin

head[6]:= cScreenWidth;

head[7]:= cScreenHeight;

size:= cScreenWidth * cScreenHeight * 3;

p:= GetMem(size);

glReadBuffer(GL_FRONT);

glReadPixels(0, 0, cScreenWidth, cScreenHeight, GL_BGR, GL_UNSIGNED_BYTE, p);

{$I-}

Assign(f, s);

Rewrite(f, 1);

if IOResult = 0 then

	begin

	BlockWrite(f, head, sizeof(head));

	BlockWrite(f, p^, size);

	Close(f);

	end;

{$I+}

FreeMem(p)

end;

function modifyDamage(dmg: Longword): Longword;

begin

ModifyDamage:= hwRound(_0_01 * cDamageModifier * dmg * cDamagePercent)

end;

{$IFDEF DEBUGFILE}

procedure AddFileLog(s: shortstring);

begin