hedgewars/SDLh.pas
author nemo
Sun, 02 Oct 2011 10:36:43 -0400
changeset 6081 537bbd5c1a62
parent 6072 e3dc802965d6
child 6224 42b256eca362
child 6280 3725cfec4542
permissions -rw-r--r--
Basic test implementation of an ice flag. Allows for slick parts of terrain. Intended for ice gun, or "ice" mask on portions of land objects. In this test variant it is triggered on girders/objects/bridges of the snow/christmas theme, or on a map that uses blue as a mask colour. Probably needs sheepluva's slope detection to make slopes more slippery to climb.

(*
 * 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;

    SDL_ALLEVENTS = $FFFFFFFF;
{$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 *}

/////////////////////////////////////////////////////////////////
///////////////////////  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;
{$IFDEF SDL13}
        type_: LongInt;
        windowID: LongInt;
        padding1, padding2: byte;
        x, y, z, xrel, yrel : LongInt;
        pressure, pressure_max, pressure_min,
        rotation, tilt, cursor: LongInt;
{$ELSE}
        type_: byte;
        x, y, xrel, yrel : word;
{$ENDIF}
        end;

    TSDL_MouseButtonEvent = record
{$IFDEF SDL13}
        type_: LongInt;
        windowID: LongInt;
        x, y: LongInt;
        padding1: byte;
{$ELSE}
        type_,
        which,
        button,
        state: byte;
        x, y: word;
{$ENDIF}
        end;

{$IFDEF SDL13}
    TSDL_MouseWheelEvent = record
        type_: LongInt;
        windowID: LongInt;
        which: Byte;
        x, y: LongInt;
        end;

//TODO: implement SDL_ProximityEvent
{$ENDIF}

    TSDL_JoyAxisEvent = record
        type_: {$IFDEF SDL13}LongInt{$ELSE}Byte{$ENDIF};
        which: Byte;
        axis: Byte;
{$IFDEF SDL13}
        padding1, padding2: Byte;
        value: LongInt;
{$ELSE}
        value: Smallint;
{$ENDIF}
        end;

    TSDL_JoyBallEvent = record
        type_: {$IFDEF SDL13}LongInt{$ELSE}Byte{$ENDIF};
        which: Byte;
        ball: Byte;
{$IFDEF SDL13}
        padding1, padding2: Byte;
        xrel, yrel: LongInt;
{$ELSE}
        xrel, yrel: Smallint;
{$ENDIF}
        end;

    TSDL_JoyHatEvent = record
        type_: {$IFDEF SDL13}LongInt{$ELSE}Byte{$ENDIF};
        which: Byte;
        hat: Byte;
        value: Byte;
{$IFDEF SDL13}
        padding1: Byte;
{$ENDIF}
        end;

    TSDL_JoyButtonEvent = record
        type_: {$IFDEF SDL13}LongInt{$ELSE}Byte{$ENDIF};
        which: Byte;
        button: Byte;
        state: Byte;
{$IFDEF SDL13}
        padding1: Byte;
{$ENDIF}
        end;

//TODO: implement SDL_TouchButtonEvent, SDL_MultiGestureEvent, SDL_DollarGestureEvent

    TSDL_QuitEvent = record
        type_: {$IFDEF SDL13}LongInt{$ELSE}Byte{$ENDIF};
        end;

    TSDL_UserEvent = record
{$IFDEF SDL13}
        type_: LongInt;
        windowID: LongInt;
{$ELSE}
        type_: Byte;
{$ENDIF}
        code: LongInt;
        data1, data2: Pointer;
        end;

    PSDL_Event = ^TSDL_Event;
    TSDL_Event = record
{$IFDEF SDL13}
        case LongInt of
            SDL_FIRSTEVENT: (type_: LongInt);
            SDL_WINDOWEVENT: (window: TSDL_WindowEvent);
            SDL_KEYDOWN,
            SDL_KEYUP: (key: TSDL_KeyboardEvent);
            SDL_TEXTEDITING,
            SDL_TEXTINPUT: (edit: byte);
            SDL_MOUSEMOTION: (motion: TSDL_MouseMotionEvent);
            SDL_MOUSEBUTTONDOWN,
            SDL_MOUSEBUTTONUP: (button: TSDL_MouseButtonEvent);
            SDL_MOUSEWHEEL: (wheel: TSDL_MouseWheelEvent);
            SDL_JOYAXISMOTION: (jaxis: TSDL_JoyAxisEvent);
            SDL_JOYBALLMOTION: (jball: TSDL_JoyBallEvent);
            SDL_JOYHATMOTION: (jhat: TSDL_JoyHatEvent);
            SDL_JOYBUTTONDOWN,
            SDL_JOYBUTTONUP: (jbutton: TSDL_JoyButtonEvent);
            SDL_QUITEV: (quit: TSDL_QuitEvent);
            SDL_USEREVENT: (user: TSDL_UserEvent);
            //TODO: implement other events
{$ELSE}
        case Byte of
            SDL_NOEVENT: (type_: byte);
            SDL_ACTIVEEVENT: (active: TSDL_ActiveEvent);
            SDL_KEYDOWN,
            SDL_KEYUP: (key: TSDL_KeyboardEvent);
            SDL_MOUSEMOTION: (motion: TSDL_MouseMotionEvent);
            SDL_MOUSEBUTTONDOWN,
            SDL_MOUSEBUTTONUP: (button: TSDL_MouseButtonEvent);
            SDL_JOYAXISMOTION: (jaxis: TSDL_JoyAxisEvent);
            SDL_JOYHATMOTION: (jhat: TSDL_JoyHatEvent);
            SDL_JOYBALLMOTION: (jball: TSDL_JoyBallEvent);
            SDL_JOYBUTTONDOWN,
            SDL_JOYBUTTONUP: (jbutton: TSDL_JoyButtonEvent);
            SDL_QUITEV: (quit: TSDL_QuitEvent);
            //SDL_SYSWMEVENT,SDL_EVENT_RESERVEDA,SDL_EVENT_RESERVEDB
            SDL_VIDEORESIZE: (resize: TSDL_ResizeEvent);
{$ENDIF}
        end;

    TSDL_EventFilter = function( event : PSDL_Event ): Integer; cdecl;

    PByteArray = ^TByteArray;
    TByteArray = array[0..65535] of Byte;
    PLongWordArray = ^TLongWordArray;
    TLongWordArray = array[0..16383] of LongWord;

    PSDL_Thread = Pointer;
    PSDL_mutex = Pointer;

    TSDL_GLattr = (
        SDL_GL_RED_SIZE,
        SDL_GL_GREEN_SIZE,
        SDL_GL_BLUE_SIZE,
        SDL_GL_ALPHA_SIZE,
        SDL_GL_BUFFER_SIZE,
        SDL_GL_DOUBLEBUFFER,
        SDL_GL_DEPTH_SIZE,
        SDL_GL_STENCIL_SIZE,
        SDL_GL_ACCUM_RED_SIZE,
        SDL_GL_ACCUM_GREEN_SIZE,
        SDL_GL_ACCUM_BLUE_SIZE,
        SDL_GL_ACCUM_ALPHA_SIZE,
        SDL_GL_STEREO,
        SDL_GL_MULTISAMPLEBUFFERS,
        SDL_GL_MULTISAMPLESAMPLES,
        SDL_GL_ACCELERATED_VISUAL,
{$IFDEF SDL13}
        SDL_GL_RETAINED_BACKING,
        SDL_GL_CONTEXT_MAJOR_VERSION,
        SDL_GL_CONTEXT_MINOR_VERSION
{$ELSE}
        SDL_GL_SWAP_CONTROL
{$ENDIF}
        );

{$IFDEF SDL13}
    TSDL_ArrayByteOrder = (  // array component order, low byte -> high byte
        SDL_ARRAYORDER_NONE,
        SDL_ARRAYORDER_RGB,
        SDL_ARRAYORDER_RGBA,
        SDL_ARRAYORDER_ARGB,
        SDL_ARRAYORDER_BGR,
        SDL_ARRAYORDER_BGRA,
        SDL_ARRAYORDER_ABGR
        );
{$ENDIF}

// Joystick/Controller support
    PSDL_Joystick = ^TSDL_Joystick;
    TSDL_Joystick = record
            end;

    {* SDL_TTF *}
    PTTF_Font = ^TTTF_font;
    TTTF_Font = record
            end;

    {* SDL_mixer *}
    PMixChunk = ^TMixChunk;
    TMixChunk = record
        allocated: Longword;
        abuf     : PByte;
        alen     : Longword;
        volume   : PByte;
        end;
    TMusic = (MUS_CMD, MUS_WAV, MUS_MOD, MUS_MID, MUS_OGG, MUS_MP3);
    TMix_Fading = (MIX_NO_FADING, MIX_FADING_OUT, MIX_FADING_IN);

    TMidiSong = record
               samples : LongInt;
               events  : pointer;
               end;

    TMusicUnion = record
        case Byte of
             0: ( midi : TMidiSong );
             1: ( ogg  : pointer);
             end;

    PMixMusic = ^TMixMusic;
    TMixMusic = record
                 end;

    {* SDL_net *}
    TIPAddress = record
                  host: Longword;
                  port: Word;
                  end;

    PTCPSocket = ^TTCPSocket;
    TTCPSocket = record
                  ready: LongInt;
                  channel: LongInt;
                  remoteAddress: TIPaddress;
                  localAddress: TIPaddress;
                  sflag: LongInt;
                  end;
    PSDLNet_SocketSet = ^TSDLNet_SocketSet;
    TSDLNet_SocketSet = record
                         numsockets,
                         maxsockets: LongInt;
                         sockets: PTCPSocket;
                         end;


/////////////////////////////////////////////////////////////////
/////////////////////  FUNCTION DEFINITIONS /////////////////////
/////////////////////////////////////////////////////////////////


{* SDL *}
function  SDL_Init(flags: Longword): LongInt; cdecl; external SDLLibName;
function  SDL_InitSubSystem(flags: LongWord): LongInt; cdecl; external SDLLibName;
procedure SDL_Quit; cdecl; external SDLLibName;

function  SDL_VideoDriverName(var namebuf; maxlen: LongInt): PChar; cdecl; external SDLLibName;
function  SDL_EnableUNICODE(enable: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_EnableKeyRepeat(delay_, interval: LongInt): LongInt; cdecl; external SDLLibName;

procedure SDL_Delay(msec: Longword); cdecl; external SDLLibName;
function  SDL_GetTicks: Longword; cdecl; external SDLLibName;

function  SDL_MustLock(Surface: PSDL_Surface): Boolean;
function  SDL_LockSurface(Surface: PSDL_Surface): LongInt; cdecl; external SDLLibName;
procedure SDL_UnlockSurface(Surface: PSDL_Surface); cdecl; external SDLLibName;

function  SDL_GetError: PChar; cdecl; external SDLLibName;

function  SDL_SetVideoMode(width, height, bpp: LongInt; flags: Longword): PSDL_Surface; cdecl; external SDLLibName;
function  SDL_CreateRGBSurface(flags: Longword; Width, Height, Depth: LongInt; RMask, GMask, BMask, AMask: Longword): PSDL_Surface; cdecl; external SDLLibName;
function  SDL_CreateRGBSurfaceFrom(pixels: Pointer; width, height, depth, pitch: LongInt; RMask, GMask, BMask, AMask: Longword): PSDL_Surface; cdecl; external SDLLibName;
procedure SDL_FreeSurface(Surface: PSDL_Surface); cdecl; external SDLLibName;
function  SDL_SetColorKey(surface: PSDL_Surface; flag, key: Longword): LongInt; cdecl; external SDLLibName;
function  SDL_SetAlpha(surface: PSDL_Surface; flag, key: Longword): LongInt; cdecl; external SDLLibName;
function  SDL_ConvertSurface(src: PSDL_Surface; fmt: PSDL_PixelFormat; flags: LongInt): PSDL_Surface; cdecl; external SDLLibName;

function  SDL_UpperBlit(src: PSDL_Surface; srcrect: PSDL_Rect; dst: PSDL_Surface; dstrect: PSDL_Rect): LongInt; cdecl; external SDLLibName;
function  SDL_FillRect(dst: PSDL_Surface; dstrect: PSDL_Rect; color: Longword): LongInt; cdecl; external SDLLibName;
procedure SDL_UpdateRect(Screen: PSDL_Surface; x, y: LongInt; w, h: Longword); cdecl; external SDLLibName;
function  SDL_Flip(Screen: PSDL_Surface): LongInt; cdecl; external SDLLibName;

procedure SDL_GetRGB(pixel: Longword; fmt: PSDL_PixelFormat; r, g, b: PByte); cdecl; external SDLLibName;
procedure SDL_GetRGBA(pixel: Longword; fmt: PSDL_PixelFormat; r, g, b, a: PByte); cdecl; external SDLLibName;
function  SDL_MapRGB(format: PSDL_PixelFormat; r, g, b: Byte): Longword; cdecl; external SDLLibName;
function  SDL_MapRGBA(format: PSDL_PixelFormat; r, g, b, a: Byte): Longword; cdecl; external SDLLibName;

function  SDL_DisplayFormat(Surface: PSDL_Surface): PSDL_Surface; cdecl; external SDLLibName;
function  SDL_DisplayFormatAlpha(Surface: PSDL_Surface): PSDL_Surface; cdecl; external SDLLibName;

function  SDL_RWFromFile(filename, mode: PChar): PSDL_RWops; cdecl; external SDLLibName;
function  SDL_SaveBMP_RW(surface: PSDL_Surface; dst: PSDL_RWops; freedst: LongInt): LongInt; cdecl; external SDLLibName;

{$IFDEF SDL13}
function  SDL_CreateWindow(title: PChar; x,y,w,h, flags: LongInt): PSDL_Window; cdecl; external SDLLibName;
function  SDL_CreateRenderer(window: PSDL_Window; index, flags: LongInt): PSDL_Renderer; cdecl; external SDLLibName;
function  SDL_DestroyWindow(window: PSDL_Window): LongInt; cdecl; external SDLLibName;
function  SDL_DestroyRenderer(renderer: PSDL_Renderer): LongInt; cdecl; external SDLLibName;
procedure SDL_SetWindowSize(window: PSDL_Window; w, h: LongInt); cdecl; external SDLLibName;

function  SDL_GL_CreateContext(window: PSDL_Window): PSDL_GLContext; cdecl; external SDLLibName;
procedure SDL_GL_DeleteContext(context: PSDL_GLContext); cdecl; external SDLLibName;
function  SDL_GL_SwapWindow(window: PSDL_Window): LongInt; cdecl; external SDLLibName;
function  SDL_GL_SetSwapInterval(interval: LongInt): LongInt; cdecl; external SDLLibName;

procedure SDL_VideoQuit; cdecl; external SDLLibName;
function  SDL_GetNumVideoDisplays: LongInt; cdecl; external SDLLibName;
procedure SDL_ShowWindow(window: PSDL_Window); cdecl; external SDLLibName;

function  SDL_SetRenderDrawColor(renderer: PSDL_Renderer; r,g,b,a: byte): LongInt; cdecl; external SDLLibName;
function  SDL_GetRenderer(window: PSDL_Window): PSDL_Renderer; cdecl; external SDLLibName;
function  SDL_RenderFillRect(renderer: PSDL_Renderer; rect: PSDL_Rect): LongInt; cdecl; external SDLLibName;
function  SDL_RenderClear(renderer: PSDL_Renderer): LongInt; cdecl; external SDLLibName;
procedure SDL_RenderPresent(renderer: PSDL_Renderer); cdecl; external SDLLibName;
function  SDL_RenderReadPixels(renderer: PSDL_Renderer; rect: PSDL_Rect; format: LongInt; pixels: pointer; pitch: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_RenderSetViewport(window: PSDL_Window; rect: PSDL_Rect): LongInt; cdecl; external SDLLibName;

function  SDL_SelectMouse(index: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_GetRelativeMouseState(x, y: PLongInt): Byte; cdecl; external SDLLibName;
function  SDL_GetNumMice: LongInt; cdecl; external SDLLibName;
function  SDL_PixelFormatEnumToMasks(format: TSDL_ArrayByteOrder; bpp: PLongInt; Rmask, Gmask, Bmask, Amask: PLongInt): boolean; cdecl; external SDLLibName;

procedure SDL_WarpMouseInWindow(window: PSDL_Window; x, y: LongInt); cdecl; external SDLLibName;
function  SDL_SetHint(name, value: PChar): boolean; cdecl; external SDLLibName;

function  SDL_PeepEvents(event: PSDL_Event; numevents: LongInt; action: SDL_eventaction; minType, maxType: LongInt): LongInt; cdecl; external SDLLibName;
{$ELSE}
function  SDL_PeepEvents(event: PSDL_Event; numevents: LongInt; action: SDL_eventaction; mask: Longword): LongInt; cdecl; external SDLLibName;
{$ENDIF}

function  SDL_GetMouseState(x, y: PLongInt): Byte; cdecl; external SDLLibName;
function  SDL_GetKeyName(key: Longword): PChar; cdecl; external SDLLibName;

procedure SDL_PumpEvents; cdecl; external SDLLibName;
function  SDL_PollEvent(event: PSDL_Event): LongInt; cdecl; external SDLLibName;
function  SDL_WaitEvent(event: PSDL_Event): LongInt; cdecl; external SDLLibName;
procedure SDL_SetEventFilter( filter : TSDL_EventFilter ); cdecl; external SDLLibName;

function  SDL_ShowCursor(toggle: LongInt): LongInt; cdecl; external SDLLibName;

procedure SDL_WM_SetIcon(icon: PSDL_Surface; mask : byte); cdecl; external SDLLibName;
procedure SDL_WM_SetCaption(title: PChar; icon: PChar); cdecl; external SDLLibName;
function  SDL_WM_ToggleFullScreen(surface: PSDL_Surface): LongInt; cdecl; external SDLLibName;

function  SDL_CreateMutex: PSDL_mutex; cdecl; external SDLLibName;
procedure SDL_DestroyMutex(mutex: PSDL_mutex); cdecl; external SDLLibName;
function  SDL_LockMutex(mutex: PSDL_mutex): LongInt; cdecl; external SDLLibName name 'SDL_mutexP';
function  SDL_UnlockMutex(mutex: PSDL_mutex): LongInt; cdecl; external SDLLibName name 'SDL_mutexV';

function  SDL_GL_SetAttribute(attr: TSDL_GLattr; value: LongInt): LongInt; cdecl; external SDLLibName;
procedure SDL_GL_SwapBuffers(); cdecl; external SDLLibName;

function  SDL_NumJoysticks: LongInt; cdecl; external SDLLibName;
function  SDL_JoystickName(idx: LongInt): PChar; cdecl; external SDLLibName;
function  SDL_JoystickOpen(idx: LongInt): PSDL_Joystick; cdecl; external SDLLibName;
function  SDL_JoystickOpened(idx: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickIndex(joy: PSDL_Joystick): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickNumAxes(joy: PSDL_Joystick): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickNumBalls(joy: PSDL_Joystick): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickNumHats(joy: PSDL_Joystick): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickNumButtons(joy: PSDL_Joystick): LongInt; cdecl; external SDLLibName;
procedure SDL_JoystickUpdate; cdecl; external SDLLibName;
function  SDL_JoystickEventState(state: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickGetAxis(joy: PSDL_Joystick; axis: LongInt): LongInt; cdecl; external SDLLibName;
function  SDL_JoystickGetBall(joy: PSDL_Joystick; ball: LongInt; dx: PInteger; dy: PInteger): Word; cdecl; external SDLLibName;
function  SDL_JoystickGetHat(joy: PSDL_Joystick; hat: LongInt): Byte; cdecl; external SDLLibName;
function  SDL_JoystickGetButton(joy: PSDL_Joystick; button: LongInt): Byte; cdecl; external SDLLibName;
procedure SDL_JoystickClose(joy: PSDL_Joystick); cdecl; external SDLLibName;

{$IFDEF WIN32}
function SDL_putenv(const text: PChar): LongInt; cdecl; external SDLLibName;
function SDL_getenv(const text: PChar): PChar; cdecl; external SDLLibName;
{$ENDIF}

{* Compatibility between SDL-1.2 and SDL-1.3 *}
procedure SDL_WarpMouse(x, y: Word); {$IFNDEF SDL13}cdecl; external SDLLibName;{$ENDIF}
function  SDL_GetKeyState(numkeys: PLongInt): PByteArray; cdecl; external SDLLibName {$IFDEF SDL13} name 'SDL_GetKeyboardState'{$ENDIF};
function  SDL_AllocFormat(format: Longword): PSDL_PixelFormat; {$IFDEF SDL13}cdecl; external SDLLibName;{$ENDIF}
procedure SDL_FreeFormat(pixelformat: PSDL_PixelFormat); {$IFDEF SDL13}cdecl; external SDLLibName;{$ENDIF}

(*  SDL_ttf  *)
function  TTF_Init: LongInt; cdecl; external SDL_TTFLibName;
procedure TTF_Quit; cdecl; external SDL_TTFLibName;

function  TTF_SizeUTF8(font: PTTF_Font; const text: PChar; out w, h: LongInt): LongInt; cdecl; external SDL_TTFLibName;

function  TTF_RenderUTF8_Solid(font: PTTF_Font; const text: PChar; fg: TSDL_Color): PSDL_Surface; cdecl; external SDL_TTFLibName;
function  TTF_RenderUTF8_Blended(font: PTTF_Font; const text: PChar; fg: TSDL_Color): PSDL_Surface; cdecl; external SDL_TTFLibName;
function  TTF_RenderUTF8_Shaded(font: PTTF_Font; const text: PChar; fg, bg: TSDL_Color): PSDL_Surface; cdecl; external SDL_TTFLibName;

function  TTF_OpenFont(const filename: PChar; size: LongInt): PTTF_Font; cdecl; external SDL_TTFLibName;
procedure TTF_SetFontStyle(font: PTTF_Font; style: LongInt); cdecl; external SDL_TTFLibName;

(*  SDL_mixer  *)
function  Mix_Init(flags: LongInt): LongInt; {$IFDEF SDL_MIXER_NEWER}cdecl; external SDL_MixerLibName;{$ENDIF}
procedure Mix_Quit; {$IFDEF SDL_MIXER_NEWER}cdecl; external SDL_MixerLibName;{$ENDIF}

function  Mix_OpenAudio(frequency: LongInt; format: Word; channels: LongInt; chunksize: LongInt): LongInt; cdecl; external SDL_MixerLibName;
procedure Mix_CloseAudio; cdecl; external SDL_MixerLibName;

function  Mix_Volume(channel: LongInt; volume: LongInt): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_SetDistance(channel: LongInt; distance: Byte): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_VolumeMusic(volume: LongInt): LongInt; cdecl; external SDL_MixerLibName;

function  Mix_AllocateChannels(numchans: LongInt): LongInt; cdecl; external SDL_MixerLibName;
procedure Mix_FreeChunk(chunk: PMixChunk); cdecl; external SDL_MixerLibName;
procedure Mix_FreeMusic(music: PMixMusic); cdecl; external SDL_MixerLibName;

function  Mix_LoadWAV_RW(src: PSDL_RWops; freesrc: LongInt): PMixChunk; cdecl; external SDL_MixerLibName;
function  Mix_LoadMUS(const filename: PChar): PMixMusic; cdecl; external SDL_MixerLibName;

function  Mix_Playing(channel: LongInt): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_PlayingMusic: LongInt; cdecl; external SDL_MixerLibName;
function  Mix_FadeInMusic(music: PMixMusic; loops: LongInt; ms: LongInt): LongInt; cdecl; external SDL_MixerLibName;

function  Mix_PlayChannelTimed(channel: LongInt; chunk: PMixChunk; loops: LongInt; ticks: LongInt): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_PlayMusic(music: PMixMusic; loops: LongInt): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_PausedMusic(music: PMixMusic): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_PauseMusic(music: PMixMusic): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_ResumeMusic(music: PMixMusic): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_HaltChannel(channel: LongInt): LongInt; cdecl; external SDL_MixerLibName;

function  Mix_FadeInChannelTimed(channel: LongInt; chunk: PMixChunk; loops: LongInt; fadems: LongInt; ticks: LongInt): LongInt; cdecl; external SDL_MixerLibName;
function  Mix_FadeOutChannel(channel: LongInt; fadems: LongInt): LongInt; cdecl; external SDL_MixerLibName;

(*  SDL_image  *)
function  IMG_Init(flags: LongInt): LongInt; {$IFDEF SDL_IMAGE_NEWER}cdecl; external SDL_ImageLibName;{$ENDIF}
procedure IMG_Quit; {$IFDEF SDL_IMAGE_NEWER}cdecl; external SDL_ImageLibName;{$ENDIF}

function  IMG_Load(const _file: PChar): PSDL_Surface; cdecl; external SDL_ImageLibName;
function  IMG_Load_RW(rwop: PSDL_RWops; freesrc: LongInt): PSDL_Surface; cdecl; external SDL_ImageLibName;
function  IMG_LoadPNG_RW(rwop: PSDL_RWops): PSDL_Surface; cdecl; external SDL_ImageLibName;
function  IMG_LoadTyped_RW(rwop: PSDL_RWops; freesrc: LongInt; type_: PChar): PSDL_Surface; cdecl; external SDL_ImageLibName;

(*  SDL_net  *)
function  SDLNet_Init: LongInt; cdecl; external SDL_NetLibName;
procedure SDLNet_Quit; cdecl; external SDL_NetLibName;

function  SDLNet_AllocSocketSet(maxsockets: LongInt): PSDLNet_SocketSet; cdecl; external SDL_NetLibName;
function  SDLNet_ResolveHost(var address: TIPaddress; host: PChar; port: Word): LongInt; cdecl; external SDL_NetLibName;
function  SDLNet_TCP_Accept(server: PTCPsocket): PTCPSocket; cdecl; external SDL_NetLibName;
function  SDLNet_TCP_Open(var ip: TIPaddress): PTCPSocket; cdecl; external SDL_NetLibName;
function  SDLNet_TCP_Send(sock: PTCPsocket; data: Pointer; len: LongInt): LongInt; cdecl; external SDL_NetLibName;
function  SDLNet_TCP_Recv(sock: PTCPsocket; data: Pointer; len: LongInt): LongInt; cdecl; external SDL_NetLibName;
procedure SDLNet_TCP_Close(sock: PTCPsocket); cdecl; external SDL_NetLibName;
procedure SDLNet_FreeSocketSet(_set: PSDLNet_SocketSet); cdecl; external SDL_NetLibName;
function  SDLNet_AddSocket(_set: PSDLNet_SocketSet; sock: PTCPSocket): LongInt; cdecl; external SDL_NetLibName;
function  SDLNet_CheckSockets(_set: PSDLNet_SocketSet; timeout: LongInt): LongInt; cdecl; external SDL_NetLibName;


procedure SDLNet_Write16(value: Word; buf: pointer);
procedure SDLNet_Write32(value: LongWord; buf: pointer);
function  SDLNet_Read16(buf: pointer): Word;
function  SDLNet_Read32(buf: pointer): LongWord;

implementation
uses uVariables;

{$IFDEF SDL13}
// this needs to be reimplemented because in SDL_compat.c the window is the one created in the SDL_SetVideoMode
// compatible function, but we use SDL_CreateWindow, so the window would be NULL
procedure SDL_WarpMouse(x, y: Word);
begin
    SDL_WarpMouseInWindow(SDLwindow, x, y);
end;
{$ELSE}
function SDL_AllocFormat(format: Longword): PSDL_PixelFormat;
const conversionFormat: TSDL_PixelFormat = (
        palette: nil; BitsPerPixel: 32; BytesPerPixel: 4;
        Rloss: 0; Gloss: 0; Bloss: 0; Aloss: 0;
        Rshift: RShift; Gshift: GShift; Bshift: BShift; Ashift: AShift;
        RMask: RMask; GMask: GMask; BMask: BMask; AMask: AMask;
        colorkey: 0; alpha: 255);
begin
    format:= format;
    exit(@conversionFormat);
end;

procedure SDL_FreeFormat(pixelformat: PSDL_PixelFormat);
begin
    pixelformat:= pixelformat;
end;
{$ENDIF}

function SDL_MustLock(Surface: PSDL_Surface): Boolean;
begin
    SDL_MustLock:=
{$IFDEF SDL13}
        ((surface^.flags and SDL_RLEACCEL) <> 0)
{$ELSE}
        ( surface^.offset <> 0 ) or (( surface^.flags and (SDL_HWSURFACE or SDL_ASYNCBLIT or SDL_RLEACCEL)) <> 0)
{$ENDIF}
end;

{$IFNDEF SDL_MIXER_NEWER}
function  Mix_Init(flags: LongInt): LongInt;
begin
    exit(flags);
end;

procedure Mix_Quit;
begin
end;
{$ENDIF}

{$IFNDEF SDL_IMAGE_NEWER}
function  IMG_Init(flags: LongInt): LongInt;
begin
    exit(flags);
end;

procedure IMG_Quit;
begin
end;
{$ENDIF}

procedure SDLNet_Write16(value: Word; buf: pointer);
begin
    PByteArray(buf)^[1]:= value;
    PByteArray(buf)^[0]:= value shr 8
end;

procedure SDLNet_Write32(value: LongWord; buf: pointer);
begin
    PByteArray(buf)^[3]:= value;
    PByteArray(buf)^[2]:= value shr  8;
    PByteArray(buf)^[1]:= value shr 16;
    PByteArray(buf)^[0]:= value shr 24
end;

function SDLNet_Read16(buf: pointer): Word;
begin
    SDLNet_Read16:= PByteArray(buf)^[1] or
                 (PByteArray(buf)^[0] shl 8)
end;

function SDLNet_Read32(buf: pointer): LongWord;
begin
    SDLNet_Read32:=  PByteArray(buf)^[3] or
                  (PByteArray(buf)^[2] shl  8) or
                  (PByteArray(buf)^[1] shl 16) or
                  (PByteArray(buf)^[0] shl 24)
end;

end.