(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2011 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 SDLh;

interface

{$IFDEF LINUX}

  {$DEFINE UNIX}

{$ENDIF}

{$IFDEF FREEBSD}

  {$DEFINE UNIX}

{$ENDIF}

{$IFDEF DARWIN}

  {$DEFINE UNIX}

{$ENDIF}

{$IFDEF HAIKU}

  {$DEFINE UNIX}

{$ENDIF}

{$IFDEF UNIX}

  {$IFNDEF DARWIN}

    {$linklib c}

  {$ENDIF}

  {$IFDEF HAIKU}

    {$linklib root}

  {$ELSE}

    {$linklib pthread}

  {$ENDIF}

{$ENDIF}

{$IFDEF FPC}

  {$PACKRECORDS C}

{$ELSE}

  {$DEFINE cdecl attribute(cdecl)}

{$ENDIF}

{$IFDEF DARWIN}

  {$IFNDEF IPHONEOS}

    {$PASCALMAINNAME SDL_main}

    {$linkframework Cocoa}

    {$linkframework SDL}

    {$linkframework SDL_net}

    {$linkframework SDL_image}

    {$linkframework SDL_ttf}

    {$linkframework SDL_mixer}

    {$linkframework OpenGL}

  {$ENDIF}

{$ENDIF}

(*  SDL  *)

const

{$IFDEF WIN32}

    SDLLibName = 'SDL.dll';

    SDL_TTFLibName = 'SDL_ttf.dll';

    SDL_MixerLibName = 'SDL_mixer.dll';

    SDL_ImageLibName = 'SDL_image.dll';

    SDL_NetLibName = 'SDL_net.dll';

{$ELSE}

  {$IFDEF DARWIN}

    SDLLibName = 'SDL';

    SDL_TTFLibName = 'SDL_ttf';

    SDL_MixerLibName = 'SDL_mixer';

    SDL_ImageLibName = 'SDL_image';

    SDL_NetLibName = 'SDL_net';

  {$ELSE}

    SDLLibName = 'libSDL.so';

    SDL_TTFLibName = 'libSDL_ttf.so';

    SDL_MixerLibName = 'libSDL_mixer.so';

    SDL_ImageLibName = 'libSDL_image.so';

    SDL_NetLibName = 'libSDL_net.so';

  {$ENDIF}

{$ENDIF}

/////////////////////////////////////////////////////////////////

/////////////////////  CONSTANT DEFINITIONS /////////////////////

/////////////////////////////////////////////////////////////////

    // SDL_Init() flags

    SDL_INIT_TIMER       = $00000001;

    SDL_INIT_AUDIO       = $00000010;

    SDL_INIT_VIDEO       = $00000020;

    SDL_INIT_JOYSTICK    = $00000200;

{$IFDEF SDL13}

    SDL_INIT_HAPTIC      = $00001000;

{$ELSE}

    SDL_INIT_CDROM       = $00000100;

    SDL_INIT_EVENTTHREAD = $01000000;

{$ENDIF}

    SDL_INIT_NOPARACHUTE = $00100000;

    SDL_INIT_EVERYTHING  = $0000FFFF;

    SDL_APPINPUTFOCUS    = $02;

    SDL_BUTTON_WHEELUP   = 4;

    SDL_BUTTON_WHEELDOWN = 5;

{$IFDEF SDL13}

    // SDL_Event types

    SDL_FIRSTEVENT        = 0;

    SDL_QUITEV            = $100;

    SDL_WINDOWEVENT       = $200;

    SDL_SYSWMEVENT        = $201;

    SDL_KEYDOWN           = $300;

    SDL_KEYUP             = $301;

    SDL_TEXTEDITING       = $302;

    SDL_TEXTINPUT         = $303;

    SDL_MOUSEMOTION       = $400;

    SDL_MOUSEBUTTONDOWN   = $401;

    SDL_MOUSEBUTTONUP     = $402;

    SDL_MOUSEWHEEL        = $403;

    SDL_INPUTMOTION       = $500;

    SDL_INPUTBUTTONDOWN   = $501;

    SDL_INPUTBUTTONUP     = $502;

    SDL_INPUTWHEEL        = $503;

    SDL_INPUTPROXIMITYIN  = $504;

    SDL_INPUTPROXIMITYOUT = $505;

    SDL_JOYAXISMOTION     = $600;

    SDL_JOYBALLMOTION     = $601;

    SDL_JOYHATMOTION      = $602;

    SDL_JOYBUTTONDOWN     = $603;

    SDL_JOYBUTTONUP       = $604;

    //TODO: implement otheer event types

    SDL_USEREVENT         = $8000;

    SDL_LASTEVENT         = $FFFF;

    // SDL_Surface flags

    SDL_SWSURFACE   = $00000000;  //*< Not used */

    SDL_PREALLOC    = $00000001;  //*< Surface uses preallocated memory */

    SDL_RLEACCEL    = $00000002;  //*< Surface is RLE encoded */

    SDL_DONTFREE    = $00000004;  //*< Surface is referenced internally */

    SDL_SRCALPHA    = $00010000;

    SDL_SRCCOLORKEY = $00020000;

    SDL_ANYFORMAT   = $00100000;

    SDL_HWPALETTE   = $00200000;

    SDL_DOUBLEBUF   = $00400000;

    SDL_FULLSCREEN  = $00800000;

    SDL_RESIZABLE   = $01000000;

    SDL_NOFRAME     = $02000000;

    SDL_OPENGL      = $04000000;

    SDL_HWSURFACE   = $08000001;  //*< Not used */

    SDL_ASYNCBLIT   = $08000000;  //*< Not used */

    SDL_RLEACCELOK  = $08000000;  //*< Not used */

    SDL_HWACCEL     = $08000000;  //*< Not used */

    // SDL_Renderer flags

    SDL_RENDERER_SOFTWARE     = $00000001;     //*< The renderer is a software fallback */

    SDL_RENDERER_ACCELERATED  = $00000002;     //*< The renderer uses hardware acceleration */

    SDL_RENDERER_PRESENTVSYNC = $00000004;

    // SDL_WindowFlags (enum)

    SDL_WINDOW_FULLSCREEN    = $00000001;      //*< fullscreen window, implies borderless */

    SDL_WINDOW_OPENGL        = $00000002;      //*< window usable with OpenGL context */

    SDL_WINDOW_SHOWN         = $00000004;      //*< window is visible */

    SDL_WINDOW_HIDDEN        = $00000008;      //*< window is not visible */

    SDL_WINDOW_BORDERLESS    = $00000010;      //*< no window decoration */

    SDL_WINDOW_RESIZABLE     = $00000020;      //*< window can be resized */

    SDL_WINDOW_MINIMIZED     = $00000040;      //*< window is minimized */

    SDL_WINDOW_MAXIMIZED     = $00000080;      //*< window is maximized */

    SDL_WINDOW_INPUT_GRABBED = $00000100;      //*< window has grabbed input focus */

    SDL_WINDOW_INPUT_FOCUS   = $00000200;      //*< window has input focus */

    SDL_WINDOW_MOUSE_FOCUS   = $00000400;      //*< window has mouse focus */

    SDL_WINDOW_FOREIGN       = $00000800;      //*< window not created by SDL */

    SDL_WINDOWPOS_CENTERED_MASK = $2FFF0000;

    // SDL_WindowEventID (enum)

    SDL_WINDOWEVENT_NONE         = 0;    //*< Never used

    SDL_WINDOWEVENT_SHOWN        = 1;    //*< Window has been shown

    SDL_WINDOWEVENT_HIDDEN       = 2;    //*< Window has been hidden

    SDL_WINDOWEVENT_EXPOSED      = 3;    //*< Window has been exposed and should be redrawn

    SDL_WINDOWEVENT_MOVED        = 4;    //*< Window has been moved to data1, data2

    SDL_WINDOWEVENT_RESIZED      = 5;    //*< Window size changed to data1xdata2

    SDL_WINDOWEVENT_SIZE_CHANGED = 6;    //*< The window size has changed, [...] */

    SDL_WINDOWEVENT_MINIMIZED    = 7;    //*< Window has been minimized

    SDL_WINDOWEVENT_MAXIMIZED    = 8;    //*< Window has been maximized

    SDL_WINDOWEVENT_RESTORED     = 9;    //*< Window has been restored to normal size and position

    SDL_WINDOWEVENT_ENTER        = 10;   //*< Window has gained mouse focus

    SDL_WINDOWEVENT_LEAVE        = 11;   //*< Window has lost mouse focus

    SDL_WINDOWEVENT_FOCUS_GAINED = 12;   //*< Window has gained keyboard focus

    SDL_WINDOWEVENT_FOCUS_LOST   = 13;   //*< Window has lost keyboard focus

    SDL_WINDOWEVENT_CLOSE        = 14;   //*< The window manager requests that the window be closed */

{$ELSE}

    // SDL_Event types

    SDL_NOEVENT         = 0;

    SDL_ACTIVEEVENT     = 1;

    SDL_KEYDOWN         = 2;

    SDL_KEYUP           = 3;

    SDL_MOUSEMOTION     = 4;

    SDL_MOUSEBUTTONDOWN = 5;

    SDL_MOUSEBUTTONUP   = 6;

    SDL_JOYAXISMOTION   = 7;

    SDL_JOYBALLMOTION   = 8;

    SDL_JOYHATMOTION    = 9;

    SDL_JOYBUTTONDOWN   = 10;

    SDL_JOYBUTTONUP     = 11;

    SDL_QUITEV          = 12;

    SDL_VIDEORESIZE     = 16;

    // SDL_Surface flags

    SDL_SWSURFACE   = $00000000;

    SDL_HWSURFACE   = $00000001;

    SDL_OPENGL      = $00000002;

    SDL_ASYNCBLIT   = $00000004;

    SDL_RESIZABLE   = $00000010;

    SDL_NOFRAME     = $00000020;

    SDL_HWACCEL     = $00000100;

    SDL_SRCCOLORKEY = $00001000;

    SDL_RLEACCEL    = $00004000;

    SDL_SRCALPHA    = $00010000;

    SDL_ANYFORMAT   = $00100000;

    SDL_HWPALETTE   = $20000000;

    SDL_DOUBLEBUF   = $40000000;

    SDL_FULLSCREEN  = $80000000;

{$ENDIF}

{$IFDEF ENDIAN_LITTLE}

    RMask = $000000FF;

    GMask = $0000FF00;

    BMask = $00FF0000;

    AMask = $FF000000;

    RShift = 0;

    GShift = 8;

    BShift = 16;

    AShift = 24;

{$ELSE}

    RMask = $FF000000;

    GMask = $00FF0000;

    BMask = $0000FF00;

    AMask = $000000FF;

    RShift = 24;

    GShift = 16;

    BShift = 8;

    AShift = 0;

{$ENDIF}

    {* SDL_mixer *}

    MIX_MAX_VOLUME = 128;

    MIX_INIT_FLAC  = $00000001;

    MIX_INIT_MOD   = $00000002;

    MIX_INIT_MP3   = $00000004;

    MIX_INIT_OGG   = $00000008;

    {* SDL_TTF *}

    TTF_STYLE_NORMAL = 0;

    TTF_STYLE_BOLD   = 1;

    TTF_STYLE_ITALIC = 2;

    {* SDL Joystick *}

    SDL_HAT_CENTERED  = $00;

    SDL_HAT_UP        = $01;

    SDL_HAT_RIGHT     = $02;

    SDL_HAT_DOWN      = $04;

    SDL_HAT_LEFT      = $08;

    SDL_HAT_RIGHTUP   = SDL_HAT_RIGHT or SDL_HAT_UP;

    SDL_HAT_RIGHTDOWN = SDL_HAT_RIGHT or SDL_HAT_DOWN;

    SDL_HAT_LEFTUP    = SDL_HAT_LEFT  or SDL_HAT_UP;

    SDL_HAT_LEFTDOWN  = SDL_HAT_LEFT  or SDL_HAT_DOWN;

    {* SDL_image *}

    IMG_INIT_JPG = $00000001;

    IMG_INIT_PNG = $00000002;

    IMG_INIT_TIF = $00000004;

    {* SDL_EventMask type definition *}

{$IFNDEF SDL13}

    SDL_ALLEVENTS = $FFFFFFFF;

{$ENDIF}

/////////////////////////////////////////////////////////////////

///////////////////////  TYPE DEFINITIONS ///////////////////////

/////////////////////////////////////////////////////////////////

type

{$IFDEF SDL13}

    PSDL_Window   = Pointer;

    PSDL_Renderer = Pointer;

    PSDL_Texture  = Pointer;

    PSDL_GLContext= Pointer;

{$ENDIF}

    PSDL_Rect = ^TSDL_Rect;

    TSDL_Rect = record

{$IFDEF SDL13}

        x, y, w, h: LongInt;

{$ELSE}

        x, y: SmallInt;

        w, h: Word;

{$ENDIF}

        end;

    TPoint = record

        X, Y: LongInt;

        end;

    PSDL_PixelFormat = ^TSDL_PixelFormat;

    TSDL_PixelFormat = record

{$IFDEF SDL13}

        format: Longword;

        palette: Pointer;   // actually it is a PSDL_Palette

        BitsPerPixel : Byte;

        BytesPerPixel: Byte;

        padding: array[0..1] of Byte;

        RMask : Longword;

        GMask : Longword;

        BMask : Longword;

        AMask : Longword;

        Rloss : Byte;

        Gloss : Byte;

        Bloss : Byte;

        Aloss : Byte;

        Rshift: Byte;

        Gshift: Byte;

        Bshift: Byte;

        Ashift: Byte;

        refcount: LongInt;

        next: PSDL_PixelFormat;

{$ELSE}

        palette: Pointer;

        BitsPerPixel : Byte;

        BytesPerPixel: Byte;

        Rloss : Byte;

        Gloss : Byte;

        Bloss : Byte;

        Aloss : Byte;

        Rshift: Byte;

        Gshift: Byte;

        Bshift: Byte;

        Ashift: Byte;

        RMask : Longword;

        GMask : Longword;

        BMask : Longword;

        AMask : Longword;

        colorkey: Longword;

        alpha: Byte;

{$ENDIF}

        end;

    SDL_eventaction = (SDL_ADDEVENT = 0, SDL_PEEPEVENT, SDL_GETEVENT);

    PSDL_Surface = ^TSDL_Surface;

    TSDL_Surface = record

        flags : Longword;

        format: PSDL_PixelFormat;

        w, h  : LongInt;

        pitch : Word;

        pixels: Pointer;

        offset: LongInt;

{$IFDEF SDL13}

        userdata: Pointer;

        locked: LongInt;

        lock_data: Pointer;

        clip_rect: TSDL_Rect;

        map: Pointer;

        refcount: LongInt;

{$ENDIF}

        end;

    PSDL_Color = ^TSDL_Color;

    TSDL_Color = record

        case byte of

            0: ( r: Byte;

                 g: Byte;

                 b: Byte;

                 unused: Byte; );

            1: ( value: Longword; );

        end;

    PSDL_RWops = ^TSDL_RWops;

    TSeek  = function( context: PSDL_RWops; offset: LongInt; whence: LongInt ): LongInt; cdecl;

    TRead  = function( context: PSDL_RWops; Ptr: Pointer; size: LongInt; maxnum : LongInt ): LongInt;  cdecl;

    TWrite = function( context: PSDL_RWops; Ptr: Pointer; size: LongInt; num: LongInt ): LongInt; cdecl;

    TClose = function( context: PSDL_RWops ): LongInt; cdecl;

    TStdio = record

        autoclose: {$IFDEF SDL13}boolean{$ELSE}LongInt{$ENDIF};

        fp: pointer;

        end;

    TMem = record

        base: PByte;

        here: PByte;

        stop: PByte;

        end;

    TUnknown = record

        data1: Pointer;

        end;

    TSDL_RWops = record

        seek: TSeek;

        read: TRead;

        write: TWrite;

        close: TClose;

        type_: Longword;

        case Byte of

            0: (stdio: TStdio);

            1: (mem: TMem);

            2: (unknown: TUnknown);

            end;

{* SDL_Event type definition *}

{$IFDEF SDL13}

    TSDL_KeySym = record

        scancode: LongInt;

        sym: LongInt;

        modifier: Smallint;

        unicode: LongInt;

        end;

    TSDL_WindowEvent = record

        type_: LongInt;

        windowID: LongInt;

        event: byte;

        padding1, padding2, padding3: byte;

        data1, data2: LongInt;

        end;

{$ELSE}

    TSDL_KeySym = record

        scancode: Byte;

        sym: Longword;

        modifier: Longword;

        unicode: Word;

        end;

    // these two are present in sdl1.3 but only for backward compatibility

    // and in 1.3 type_ is LongInt, not byte

    TSDL_ActiveEvent = record

        type_: byte;

        gain: byte;

        state: byte;

        end;

    TSDL_ResizeEvent = record

        type_: Byte;

        w, h: LongInt;

        end;

{$ENDIF}

    TSDL_KeyboardEvent = record

{$IFDEF SDL13}

        type_: LongInt;

        windowID: LongInt;

        state, repeat_, padding2, padding3: byte;

{$ELSE}

        type_: byte;

        which: byte;

        state: byte;

{$ENDIF}

        keysym: TSDL_KeySym;

        end;

//TODO: implement SDL_TextEditingEvent + SDL_TextInputEvent for sdl13

    // this structure is wrong but the correct version makes the game hang

    TSDL_MouseMotionEvent = record

        which: byte;

        state: byte;

{$IFDEF SDL13}

        type_: LongInt;

        windowID: LongInt;

        padding1, padding2: byte;

        x, y, z, xrel, yrel : LongInt;

        pressure, pressure_max, pressure_min,