(*

* 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

*)

{$INCLUDE "options.inc"}

unit uMisc;

interface

uses    SDLh, uConsts, uFloat, GLunit, Math, uTypes;

procedure SplitBySpace(var a, b: shortstring);

procedure SplitByChar(var a, b: ansistring; c: char);

function  EnumToStr(const en : TGearType) : shortstring; overload;

function  EnumToStr(const en : TSound) : shortstring; overload;

function  EnumToStr(const en : TAmmoType) : shortstring; overload;

function  EnumToStr(const en : THogEffect) : shortstring; overload;

procedure movecursor(dx, dy: LongInt);

function  hwSign(r: hwFloat): LongInt; inline;

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

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

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

procedure TryDo(Assert: boolean; Msg: shortstring; isFatal: boolean); inline;

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);

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; enableClamp: boolean): PTexture;

procedure FreeTexture(tex: PTexture);

function  toPowerOf2(i: Longword): Longword; inline;

function  DecodeBase64(s: shortstring): shortstring;

function  doSurfaceConversion(tmpsurf: PSDL_Surface): PSDL_Surface;

function  endian(independent: LongWord): LongWord; inline;

{$IFDEF DEBUGFILE}

procedure AddFileLog(s: shortstring);

(* function  RectToStr(Rect: TSDL_Rect): shortstring; *)

{$ENDIF}

procedure MakeScreenshot(filename: shortstring);

implementation

var KBnum: Longword;

{$IFDEF DEBUGFILE}

    f: textfile;

{$ENDIF}

// should this include "strtolower()" for the split string?

procedure SplitBySpace(var a, b: shortstring);

var i, t: LongInt;

begin

i:= Pos(' ', a);

if i > 0 then

    begin

    for t:= 1 to Pred(i) do

        if (a[t] >= 'A')and(a[t] <= 'Z') then Inc(a[t], 32);

    b:= copy(a, i + 1, Length(a) - i);

    byte(a[0]):= Pred(i)

    end else b:= '';

end;

procedure SplitByChar(var a, b: ansistring; c: char);

var i: LongInt;

begin

i:= Pos(c, a);

if i > 0 then

    begin

    b:= copy(a, i + 1, Length(a) - i);

    setlength(a, Pred(i));

    end else b:= '';

end;

function EnumToStr(const en : TGearType) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TGearType), ord(en))

end;

function EnumToStr(const en : TSound) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TSound), ord(en))

end;

function EnumToStr(const en : TAmmoType) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TAmmoType), ord(en))

end;

function EnumToStr(const en: THogEffect) : shortstring; overload;

begin

    EnumToStr := GetEnumName(TypeInfo(THogEffect), ord(en))

end;

procedure movecursor(dx, dy: LongInt);

var x, y: LongInt;

begin

if (dx = 0) and (dy = 0) then exit;

SDL_GetMouseState(@x, @y);

Inc(x, dx);

Inc(y, dy);

SDL_WarpMouse(x, y);

end;

function hwSign(r: hwFloat): LongInt;

begin

// yes, we have negative zero for a reason

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: shortstring; isFatalError: boolean);

begin

// obsolete? written in WriteLnToConsole() anyway

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

WriteLnToConsole(Msg);

if isFatalError then

    begin

    SendIPC('E' + GetLastConsoleLine);

    SDL_Quit;

    halt(1)

    end

end;

procedure TryDo(Assert: boolean; Msg: shortstring; 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;

procedure SetKB(n: Longword);

begin

KBnum:= n

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;

procedure SetTextureParameters(enableClamp: Boolean);

begin

    if enableClamp and ((cReducedQuality and rqClampLess) = 0) then

    begin

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)

    end;

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)

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 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 = 'rDkKHTPsSB';

var buf: shortstring;

begin

buf:= 'i' + stc[sit] + s;

SendIPCRaw(@buf[0], length(buf) + 1)

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;

procedure ResetVertexArrays(texture: PTexture);

begin

with texture^ do

    begin

    vb[0].X:= 0;

    vb[0].Y:= 0;

    vb[1].X:= w;

    vb[1].Y:= 0;

    vb[2].X:= w;

    vb[2].Y:= h;

    vb[3].X:= 0;

    vb[3].Y:= h;

    tb[0].X:= 0;

    tb[0].Y:= 0;

    tb[1].X:= rx;

    tb[1].Y:= 0;

    tb[2].X:= rx;

    tb[2].Y:= ry;

    tb[3].X:= 0;

    tb[3].Y:= ry

    end;

end;

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

begin

new(NewTexture);

NewTexture^.PrevTexture:= nil;

NewTexture^.NextTexture:= nil;

NewTexture^.Scale:= 1;

if TextureList <> nil then

    begin

    TextureList^.PrevTexture:= NewTexture;

    NewTexture^.NextTexture:= TextureList

    end;

TextureList:= NewTexture;

NewTexture^.w:= width;

NewTexture^.h:= height;

NewTexture^.rx:= 1.0;

NewTexture^.ry:= 1.0;

ResetVertexArrays(NewTexture);

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);

SetTextureParameters(true);

end;

function Surface2Tex(surf: PSDL_Surface; enableClamp: boolean): PTexture;

var tw, th, x, y: Longword;

    tmpp: pointer;

    fromP4, toP4: PLongWordArray;

begin

new(Surface2Tex);

Surface2Tex^.PrevTexture:= nil;

Surface2Tex^.NextTexture:= nil;

if TextureList <> nil then

    begin

    TextureList^.PrevTexture:= Surface2Tex;

    Surface2Tex^.NextTexture:= TextureList

    end;

TextureList:= Surface2Tex;

Surface2Tex^.w:= surf^.w;

Surface2Tex^.h:= surf^.h;

if (surf^.format^.BytesPerPixel <> 4) then

    begin

    TryDo(false, 'Surface2Tex failed, expecting 32 bit surface', 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 SupportNPOTT) and (not (isPowerOf2(Surf^.w) and isPowerOf2(Surf^.h))) then

    begin

    tw:= toPowerOf2(Surf^.w);

    th:= toPowerOf2(Surf^.h);

    Surface2Tex^.rx:= Surf^.w / tw;

    Surface2Tex^.ry:= Surf^.h / th;

    GetMem(tmpp, tw * th * surf^.format^.BytesPerPixel);

    fromP4:= Surf^.pixels;

    toP4:= tmpp;

    for y:= 0 to Pred(Surf^.h) do

        begin

        for x:= 0 to Pred(Surf^.w) do toP4^[x]:= fromP4^[x];

        for x:= Surf^.w to Pred(tw) do toP4^[x]:= 0;

        toP4:= @(toP4^[tw]);

        fromP4:= @(fromP4^[Surf^.pitch div 4])

        end;

    for y:= Surf^.h to Pred(th) do

        begin

        for x:= 0 to Pred(tw) do toP4^[x]:= 0;

        toP4:= @(toP4^[tw])

        end;

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA, GL_UNSIGNED_BYTE, tmpp);

    FreeMem(tmpp, tw * th * surf^.format^.BytesPerPixel)

    end

else

    begin

    Surface2Tex^.rx:= 1.0;

    Surface2Tex^.ry:= 1.0;

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, surf^.w, surf^.h, 0, GL_RGBA, GL_UNSIGNED_BYTE, surf^.pixels);

    end;

ResetVertexArrays(Surface2Tex);

if SDL_MustLock(surf) then

    SDL_UnlockSurface(surf);

SetTextureParameters(enableClamp);

end;

procedure FreeTexture(tex: PTexture);

begin

    if tex <> nil then

    begin

        if tex^.NextTexture <> nil then

            tex^.NextTexture^.PrevTexture:= tex^.PrevTexture;

        if tex^.PrevTexture <> nil then

            tex^.PrevTexture^.NextTexture:= tex^.NextTexture

        else

            TextureList:= tex^.NextTexture;

        glDeleteTextures(1, @tex^.id);

        Dispose(tex);

    end

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;

procedure MakeScreenshot(filename: shortstring);

var p: Pointer;

    size: Longword;

    f: file;

    // Windows Bitmap Header

    head: array[0..53] of Byte = (

    $42, $4D, // identifier ("BM")

    0, 0, 0, 0, // file size

    0, 0, 0, 0, // reserved

    54, 0, 0, 0, // starting offset

    40, 0, 0, 0, // header size

    0, 0, 0, 0, // width

    0, 0, 0, 0, // height

    1, 0, // color planes

    24, 0, // bit depth

    0, 0, 0, 0, // compression method (uncompressed)

    0, 0, 0, 0, // image size

    96, 0, 0, 0, // horizontal resolution

    96, 0, 0, 0, // vertical resolution

    0, 0, 0, 0, // number of colors (all)

    0, 0, 0, 0 // number of important colors

    );

begin

// flash

ScreenFade:= sfFromWhite;

ScreenFadeValue:= sfMax;