(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2013 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}

    {$IFDEF HAIKU}

        {$linklib root}

    {$ELSE}

        {$IFNDEF ANDROID}

            {$linklib pthread}

        {$ENDIF}

    {$ENDIF}

{$ENDIF}

{$IFDEF FPC}

    {$PACKRECORDS C}

{$ELSE}

    {$DEFINE cdecl attribute(cdecl)}

    type PByte = ^Byte;

    type PInteger = ^Integer;

    type PLongInt = ^LongInt;

{$ENDIF}

{$IFDEF DARWIN}

    {$IFNDEF HWLIBRARY}

    {$ENDIF}

{$ENDIF}

(*  SDL  *)

const

{$ELSE}

{$ENDIF}

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

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

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

    // SDL_Init() flags

    SDL_INIT_TIMER          = $00000001;

    SDL_INIT_AUDIO          = $00000010;

    SDL_INIT_VIDEO          = $00000020; // implies SDL_INIT_EVENTS (sdl2)

    SDL_INIT_JOYSTICK       = $00000200; // implies SDL_INIT_EVENTS (sdl2)

    SDL_INIT_HAPTIC         = $00001000;

    SDL_INIT_GAMECONTROLLER = $00002000; // implies SDL_INIT_JOYSTICK

    SDL_INIT_EVENTS         = $00004000;

    SDL_INIT_NOPARACHUTE    = $00100000;

    //SDL_INIT_EVERYTHING                // unsafe, init subsystems one at a time

    SDL_ALLEVENTS        = $FFFFFFFF;    // dummy event type to prevent stack corruption

    SDL_APPINPUTFOCUS    = $02;

    SDL_BUTTON_LEFT      = 1;

    SDL_BUTTON_MIDDLE    = 2;

    SDL_BUTTON_RIGHT     = 3;

    SDL_BUTTON_WHEELUP   = 4;

    SDL_BUTTON_WHEELDOWN = 5;

    SDL_TEXTEDITINGEVENT_TEXT_SIZE = 32;

    SDL_TEXTINPUTEVENT_TEXT_SIZE   = 32;

    // SDL_Event types

    // pascal does not support unions as is, so we list here every possible event

    // and later associate a struct type each

    SDL_FIRSTEVENT        = 0;              // type

    SDL_COMMONDEVENT      = 1;              // type and timestamp

    SDL_QUITEV            = $100;

    SDL_APP_TERMINATING   = $101;

    SDL_APP_LOWMEMORY     = $102;

    SDL_APP_WILLENTERBACKGROUND = $103;

    SDL_APP_DIDENTERBACKGROUND = $104;

    SDL_APP_WILLENTERFOREGROUND = $105;

    SDL_APP_DIDENTERFOREGROUND = $106;

    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_JOYAXISMOTION     = $600;

    SDL_JOYBALLMOTION     = $601;

    SDL_JOYHATMOTION      = $602;

    SDL_JOYBUTTONDOWN     = $603;

    SDL_JOYBUTTONUP       = $604;

    SDL_JOYDEVICEADDED    = $605;

    SDL_JOYDEVICEREMOVED  = $606;

    SDL_CONTROLLERAXISMOTION = $650;

    SDL_CONTROLLERBUTTONDOWN = $651;

    SDL_CONTROLLERBUTTONUP = $652;

    SDL_CONTROLLERDEVICEADDED = $653;

    SDL_CONTROLLERDEVICEREMOVED = $654;

    SDL_CONTROLLERDEVICEREMAPPED = $655;

    SDL_FINGERDOWN        = $700;

    SDL_FINGERUP          = $701;

    SDL_FINGERMOTION      = $702;

    SDL_DOLLARGESTURE     = $800;

    SDL_DOLLARRECORD      = $801;

    SDL_MULTIGESTURE      = $802;

    SDL_CLIPBOARDUPDATE   = $900;

    SDL_DROPFILE          = $1000;

    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_SRCCOLORKEY = $00020000;  // compatibility only

    // SDL_RendererFlags

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

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

    SDL_RENDERER_PRESENTVSYNC = $00000004;     //*< Present is synchronized with the refresh rate */

    SDL_RENDERER_TARGETTEXTURE = $00000008;    //*< The renderer supports rendering to texture */

    // SDL_WindowFlags

    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_FULLSCREEN_DESKTOP = $00001001; //*< fullscreen as maximed window */

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

    SDL_WINDOWPOS_CENTERED_MASK = $2FFF0000;

    // SDL_WindowEventID

    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 */

{$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}

    KMOD_NONE   = $0000;

    KMOD_LSHIFT = $0001;

    KMOD_RSHIFT = $0002;

    KMOD_LCTRL  = $0040;

    KMOD_RCTRL  = $0080;

    KMOD_LALT   = $0400;

    KMOD_RALT   = $0800;

    KMOD_LMETA  = $0400;

    KMOD_RMETA  = $0800;

    KMOD_NUM    = $1000;

    KMOD_CAPS   = $2000;

    KMOD_MODE   = $4000;

    {* 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_keysym *}

    SDLK_BACKSPACE = 8;

    SDLK_RETURN    = 13;

    SDLK_ESCAPE    = 27;

    SDLK_q         = 113;

    SDLK_w         = 119;

    SDLK_DELETE    = 127;

    SDLK_KP_ENTER  = 271;

    SDLK_UP        = 273;

    SDLK_DOWN      = 274;

    SDLK_RIGHT     = 275;

    SDLK_LEFT      = 276;

    SDLK_HOME      = 278;

    SDLK_END       = 279;

    SDLK_PAGEUP    = 280;

    SDLK_PAGEDOWN  = 281;

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

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

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

// two important reference points for the wanderers of this area

// http://www.freepascal.org/docs-html/ref/refsu5.html

// http://www.freepascal.org/docs-html/prog/progsu144.html

type

    PSDL_Window   = Pointer;

    PSDL_Renderer = Pointer;

    PSDL_Texture  = Pointer;

    PSDL_GLContext= Pointer;

    TSDL_TouchId  = Int64;

    TSDL_FingerId = Int64;

    TSDL_eventaction = (SDL_ADDEVENT, SDL_PEEPEVENT, SDL_GETEVENT);

    PSDL_Rect = ^TSDL_Rect;

    TSDL_Rect = record

        x, y, w, h: LongInt;

        end;

    TPoint = record

        x, y: LongInt;

        end;

    PSDL_PixelFormat = ^TSDL_PixelFormat;

    TSDL_PixelFormat = record

        format: LongWord;

        palette: Pointer;

        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;

        end;

    PSDL_Surface = ^TSDL_Surface;

    TSDL_Surface = record

        flags : LongWord;

        format: PSDL_PixelFormat;

        w, h  : LongInt;

        pixels: Pointer;

        userdata: Pointer;

        locked: LongInt;

        lock_data: Pointer;

        clip_rect: TSDL_Rect;

        map: Pointer;

        refcount: LongInt;

        end;

    PSDL_Color = ^TSDL_Color;

    TSDL_Color = record

            r: Byte;

            g: Byte;

            b: Byte;

            a: Byte; //sdl12 name is 'unused' but as long as size matches...

        end;

    (* SDL_RWops and friends *)

    PSDL_RWops = ^TSDL_RWops;

    TSize  = function( context: PSDL_RWops): Int64; cdecl;

    TSeek  = function( context: PSDL_RWops; offset: Int64; whence: LongInt ): Int64; 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

        fp: Pointer;

        end;

    TMem = record

        base: PByte;

        here: PByte;

        stop: PByte;

        end;

    TUnknown = record

        data1: Pointer;

        data2: Pointer;

        end;

{$IFDEF ANDROID}

    TAndroidio = record

        fileName, inputStream, readableByteChannel: Pointer;

        readMethod, assetFileDescriptor: Pointer;

        position, size, offset: Int64;

        fd: LongInt;

        end;

{$ELSE}

{$IFDEF WIN32}

    TWinbuffer = record

        data: Pointer;

        size, left: LongInt;

        end;

    TWindowsio = record

        h : Pointer;

        buffer : TWinbuffer;

        end;

{$ENDIF}

{$ENDIF}

    TSDL_RWops = record

        size: TSize;

        seek: TSeek;

        read: TRead;

        write: TWrite;

        close: TClose;

        type_: LongWord;

        case Byte of

{$IFDEF ANDROID}

            0: (androidio: TAndroidio);

{$ELSE}

{$IFDEF WIN32}

            0: (windowsio: TWindowsio);

{$ENDIF}

{$ENDIF}

            1: (stdio: TStdio);     // assumes HAVE_STDIO_H

            2: (mem: TMem);

            3: (unknown: TUnknown);

            end;

{* SDL_Event type definition *}

    TSDL_Keysym = record

        scancode: LongInt;

        sym: LongInt;

        modifier: Word;

        unused: LongWord;

        end;

    TSDL_WindowEvent = record

        type_: LongWord;

        timestamp: LongWord;

        windowID: LongWord;

        event: Byte;

        padding1, padding2, padding3: Byte;

        data1, data2: LongInt;

        end;

    TSDL_TextEditingEvent = record

        type_: Longword;

        timestamp: Longword;

        windowID: Longword;

        text: array [0..SDL_TEXTEDITINGEVENT_TEXT_SIZE - 1] of char;

        start: LongInt;

        length: LongInt;

        end;

    TSDL_TextInputEvent = record

        type_: Longword;

        timestamp: Longword;

        windowID: Longword;

        text: array [0..SDL_TEXTINPUTEVENT_TEXT_SIZE - 1] of char;

        end;

    TSDL_TouchFingerEvent = record

        type_: LongWord;

        timestamp: LongWord;

        touchId: TSDL_TouchId;

        fingerId: TSDL_FingerId;

        x, y, dx, dy: Single;

        pressure: Single;

        end;

    TSDL_MultiGestureEvent = record

        type_: LongWord;

        timestamp: LongWord;

        touchId: TSDL_TouchId;

        dTheta, dDist, x, y: Single;

        numFingers, padding: Word;

        end;

    TSDL_DollarGestureEvent = record

        type_: LongWord;

        timestamp: LongWord;

        touchId: Int64;

        gesturedId: Int64;

        numFingers: LongWord;

        error, x, y: Single;