/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public

    License along with this library; if not, write to the Free

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

    Sam Lantinga

    slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

 "@(#) $Id$";

#endif

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <string.h>

#include <sys/ioctl.h>

#include "SDL.h"

#include "SDL_error.h"

#include "SDL_timer.h"

#include "SDL_thread.h"

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "SDL_endian.h"

#include "SDL_sysvideo.h"

#include "SDL_pixels_c.h"

#include "SDL_events_c.h"

#include "SDL_ph_video.h"

#include "SDL_ph_modes_c.h"

#include "SDL_ph_image_c.h"

#include "SDL_ph_events_c.h"

#include "SDL_ph_mouse_c.h"

#include "SDL_ph_wm_c.h"

#include "SDL_phyuv_c.h"

#include "blank_cursor.h"

static int ph_VideoInit(_THIS, SDL_PixelFormat *vformat);

static SDL_Surface *ph_SetVideoMode(_THIS, SDL_Surface *current,

                int width, int height, int bpp, Uint32 flags);

static int ph_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);

static void ph_VideoQuit(_THIS);

static void ph_DeleteDevice(SDL_VideoDevice *device);

#ifdef HAVE_OPENGL

int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags);

static void ph_GL_SwapBuffers(_THIS);

static int ph_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);

#endif /* HAVE_OPENGL */

static int ph_Available(void)

{

    int phstat=-1;

    phstat=PtInit(0);

    if (phstat==0)

    {

       return 1;

    }

    else

    {

       return 0;

    }

}

static SDL_VideoDevice *ph_CreateDevice(int devindex)

{

    SDL_VideoDevice *device;

    /* Initialize all variables that we clean on shutdown */

    device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));

    if (device) {

        memset(device, 0, (sizeof *device));

        device->hidden = (struct SDL_PrivateVideoData *)

                malloc((sizeof *device->hidden));

        device->gl_data = NULL;

    }

    if ( (device == NULL) || (device->hidden == NULL) ) {

        SDL_OutOfMemory();

        ph_DeleteDevice(device);

        return(0);

    }

    memset(device->hidden, 0, (sizeof *device->hidden));

    /* Set the driver flags */

    device->handles_any_size = 1; /* JB not true for fullscreen */

    /* Set the function pointers */

    device->CreateYUVOverlay = ph_CreateYUVOverlay;

    device->VideoInit = ph_VideoInit;

    device->ListModes = ph_ListModes;

    device->SetVideoMode = ph_SetVideoMode;

    device->ToggleFullScreen = ph_ToggleFullScreen;

    device->UpdateMouse = NULL;	

    device->SetColors = ph_SetColors;

    device->UpdateRects = NULL;         /* ph_ResizeImage */

    device->VideoQuit = ph_VideoQuit;

    device->AllocHWSurface = ph_AllocHWSurface;

    device->CheckHWBlit = NULL;

    device->FillHWRect = NULL;

    device->SetHWColorKey = NULL;

    device->SetHWAlpha = NULL;

    device->LockHWSurface = ph_LockHWSurface;

    device->UnlockHWSurface = ph_UnlockHWSurface;

    device->FlipHWSurface = ph_FlipHWSurface;

    device->FreeHWSurface = ph_FreeHWSurface;

    device->SetCaption = ph_SetCaption;

    device->SetIcon = NULL;

    device->IconifyWindow = ph_IconifyWindow;

    device->GrabInput = ph_GrabInput;

    device->GetWMInfo = ph_GetWMInfo;

    device->FreeWMCursor = ph_FreeWMCursor;

    device->CreateWMCursor = ph_CreateWMCursor;

    device->ShowWMCursor = ph_ShowWMCursor;

    device->WarpWMCursor = ph_WarpWMCursor;

    device->CheckMouseMode = ph_CheckMouseMode;

    device->InitOSKeymap = ph_InitOSKeymap;

    device->PumpEvents = ph_PumpEvents;

    /* OpenGL support. */

    device->GL_LoadLibrary = NULL;

    device->GL_GetProcAddress = NULL;

    device->GL_MakeCurrent = NULL;

#ifdef HAVE_OPENGL

    device->GL_SwapBuffers = ph_GL_SwapBuffers;

    device->GL_GetAttribute = ph_GL_GetAttribute;

#else

    device->GL_SwapBuffers = NULL;

    device->GL_GetAttribute = NULL;

#endif /* HAVE_OPENGL */

    device->free = ph_DeleteDevice;

    return device;

}

VideoBootStrap ph_bootstrap = {

    "photon", "QNX Photon video output",

    ph_Available, ph_CreateDevice

};

static void ph_DeleteDevice(SDL_VideoDevice *device)

{

    if (device)

    {

        if (device->hidden)

        {

            free(device->hidden);

            device->hidden = NULL;

        }

        if (device->gl_data)

        {

            free(device->gl_data);

            device->gl_data = NULL;

        }

        free(device);

        device = NULL;

    }

}

static int ph_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

    int i;

    unsigned long *tempptr;

    int rtnval;

    PgVideoModeInfo_t my_mode_info;

    PgHWCaps_t my_hwcaps;

    window=NULL;

    oglctx=NULL;

    desktoppal=SDLPH_PAL_NONE;

    captionflag=0;

    old_video_mode=-1;

    old_refresh_rate=-1;

    if (NULL == (event = malloc(EVENT_SIZE)))

    {

        exit(EXIT_FAILURE);

    }

    /* Create the blank cursor */

    SDL_BlankCursor = this->CreateWMCursor(this, blank_cdata, blank_cmask,

                                          (int)BLANK_CWIDTH, (int)BLANK_CHEIGHT,

                                          (int)BLANK_CHOTX, (int)BLANK_CHOTY);

    if (SDL_BlankCursor == NULL)

    {

        printf("ph_VideoInit: could not create blank cursor\n");

    }

    if (PgGetGraphicsHWCaps(&my_hwcaps) < 0)

    {

        fprintf(stderr,"ph_VideoInit: GetGraphicsHWCaps failed!! \n");

    }

    if (PgGetVideoModeInfo(my_hwcaps.current_video_mode, &my_mode_info) < 0)

    {

        fprintf(stderr,"ph_VideoInit:  PgGetVideoModeInfo failed\n");

    }

    /* We need to return BytesPerPixel as it in used by CreateRGBsurface */

    vformat->BitsPerPixel = my_mode_info.bits_per_pixel;

    vformat->BytesPerPixel = my_mode_info.bytes_per_scanline/my_mode_info.width;

    desktopbpp = my_mode_info.bits_per_pixel;

    /* return a palette if we are in 256 color mode */

    if (vformat->BitsPerPixel == 8)

    {

        vformat->palette = malloc(sizeof(SDL_Palette));

        memset(vformat->palette, 0, sizeof(SDL_Palette));

        vformat->palette->ncolors = 256;

        vformat->palette->colors = (SDL_Color *)malloc(256 *sizeof(SDL_Color));

        /* fill the palette */

        rtnval = PgGetPalette(ph_palette);

        if (rtnval < 0)

        {

	    fprintf(stderr, "ph_VideoInit: PgGetPalette failed\n");

        }

        tempptr = (unsigned long *)vformat->palette->colors;

        for(i=0;i<256; i++)

        {

            *tempptr = (((unsigned long)ph_palette[i]) << 8);

            tempptr++;

        }		

    }

    currently_fullscreen = 0;

    this->info.wm_available = 1;

    return 0;

}

static SDL_Surface *ph_SetVideoMode(_THIS, SDL_Surface *current,

                int width, int height, int bpp, Uint32 flags)

{

    PgDisplaySettings_t settings;

    int mode;

    PtArg_t arg[32];

    PhDim_t dim;

    int rtnval;

    int i;

    unsigned long *tempptr;

    int pargc;

    dim.w=width;

    dim.h=height;

    /* Lock the event thread, in multi-threading environments */

    SDL_Lock_EventThread();

    /* create window if no OpenGL support selected */

    if ((flags & SDL_OPENGL)!=SDL_OPENGL)

    {

        pargc=0;

        PtSetArg(&arg[pargc++], Pt_ARG_DIM, &dim, 0);

        PtSetArg(&arg[pargc++], Pt_ARG_RESIZE_FLAGS, Pt_FALSE, Pt_RESIZE_XY_AS_REQUIRED);

        if (window!=NULL)

        {

            PtUnrealizeWidget(window);

            PtDestroyWidget(window);

            window=NULL;

        }

        window=PtCreateWidget(PtWindow, NULL, pargc-1, arg);

        PtRealizeWidget(window);

        PtFlush();

    }

#ifdef HAVE_OPENGL

    if (flags & SDL_OPENGL)

    {

        /* ph_SetupOpenGLContext creates also window as need */

        if (ph_SetupOpenGLContext(this, width, height, bpp, flags)==0)

        {

            current->flags=flags;

            /* setup OGL update function ... ugly method */

            ph_ResizeImage(this, current, flags); 

        }

        else

        {

            /* if context creation fail, report no OpenGL to high level */

            current->flags=(flags & (~SDL_OPENGL));

        }

#else

    if (flags & SDL_OPENGL) /* if no built-in OpenGL support */

    {

        fprintf(stderr, "error: no OpenGL support, try to recompile library.\n");

        current->flags=(flags & (~SDL_OPENGL));

        return NULL;

#endif /* HAVE_OPENGL */

    }

    else

    {

        /* Initialize the window */

        if (flags & SDL_FULLSCREEN) /* Direct Context , assume SDL_HWSURFACE also set */

        {

            /* Get the video mode and set it */

            if (flags & SDL_ANYFORMAT)

            {

                if ((mode = get_mode_any_format(width, height, bpp)) == 0)

                {

                    fprintf(stderr,"error: get_mode_any_format failed\n");

                    exit(1);

                }

            }

            else

            {

                if ((mode = get_mode(width, height, bpp)) == 0)

                {

                    fprintf(stderr,"error: get_mode failed\n");

                    exit(1);

                }

            }

            if (bpp==8)

            {

               desktoppal=SDLPH_PAL_SYSTEM;

            }

            /* save old video mode caps */

            PgGetVideoMode(&settings);

            old_video_mode=settings.mode;

            old_refresh_rate=settings.refresh;

            /* setup new video mode */

            settings.mode = mode;

            settings.refresh = 0;

            settings.flags = 0;

            if (PgSetVideoMode(&settings) < 0)

            {

                fprintf(stderr,"error: PgSetVideoMode failed\n");

            }

            current->flags = (flags & (~SDL_RESIZABLE)); /* no resize for Direct Context */

            /* Begin direct mode */

            ph_EnterFullScreen(this);

        } /* end fullscreen flag */

        else

        {

            if (flags & SDL_HWSURFACE)  /* Use offscreen memory iff SDL_HWSURFACE flag is set */

            {

                /* Hardware surface is Offsceen Context.  ph_ResizeImage handles the switch */

                current->flags = (flags & (~SDL_RESIZABLE)); /* no stretch blit in offscreen context */

            }

            else /* must be SDL_SWSURFACE */

            {

                current->flags = (flags | SDL_RESIZABLE); /* yes we can resize as this is a software surface */

            }

            /* using palette emulation code in window mode */

            if (bpp==8)

            {

                if (desktopbpp>=15)

                {

                    desktoppal=SDLPH_PAL_EMULATE;

                }

                else

                {

                    desktoppal=SDLPH_PAL_SYSTEM;

                }

            }

            else

            {

               desktoppal=SDLPH_PAL_NONE;

            }

        }

	/* If we are setting video to use the palette make sure we have allocated memory for it */

	if (bpp==8)

	{

            current->format->palette = malloc(sizeof(SDL_Palette));

            memset(current->format->palette, 0, sizeof(SDL_Palette));

            current->format->palette->ncolors = 256;

            current->format->palette->colors = (SDL_Color *)malloc(256 *sizeof(SDL_Color));

            /* fill the palette */

            rtnval = PgGetPalette(ph_palette);

            tempptr = (unsigned long *)current->format->palette->colors;

            for(i=0; i<256; i++)

            {

                *tempptr = (((unsigned long)ph_palette[i]) << 8);

                tempptr++;

            }

        }

    }

    current->w = width;

    current->h = height;

    current->format->BitsPerPixel = bpp;

    current->format->BytesPerPixel = (bpp+7)/8;

    current->pitch = SDL_CalculatePitch(current);

    /* Must call at least once it setup image planes */

    ph_ResizeImage(this, current, flags);

    /* delayed set caption call */

    if (captionflag)

    {

        ph_SetCaption(this, this->wm_title, NULL);

    }

    SDL_Unlock_EventThread();

    /* We're done! */

    return (current);

}

static void ph_VideoQuit(_THIS)

{

    PhRegion_t region_info;

    ph_DestroyImage(this, SDL_VideoSurface); 

    if (currently_fullscreen)

    {

        ph_LeaveFullScreen(this);

    }

#ifdef HAVE_OPENGL

    /* prevent double SEGFAULT with parachute mode */

    if (this->screen)

    {

        if (((this->screen->flags & SDL_FULLSCREEN)==SDL_FULLSCREEN) &&

            ((this->screen->flags & SDL_OPENGL)==SDL_OPENGL))

        {

            region_info.cursor_type=Ph_CURSOR_POINTER;

            region_info.rid=PtWidgetRid(window);

            PhRegionChange(Ph_REGION_CURSOR, 0, &region_info, NULL, NULL);

        }

    }

    PtFlush();

#endif /* HAVE_OPENGL */

    if (window)

    {

        PtUnrealizeWidget(window);

        PtDestroyWidget(window);

        window=NULL;

    }

    /* restore palette */

    if (desktoppal!=SDLPH_PAL_NONE)

    {

        PgSetPalette(ph_palette, 0, 0, _Pg_MAX_PALETTE, Pg_PALSET_GLOBAL | Pg_PALSET_FORCE_EXPOSE, 0);

    }

#ifdef HAVE_OPENGL

    if (oglctx)

    {

        PhDCSetCurrent(NULL);

        PhDCRelease(oglctx);

        oglctx=NULL;

    }

#endif /* HAVE_OPENGL */

}

static int ph_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

{

    int i;

    PhPoint_t point={0, 0};

    PgColor_t syspalph[_Pg_MAX_PALETTE];

    /* palette emulation code, using palette of the PhImage_t struct */

    if (desktoppal==SDLPH_PAL_EMULATE)

    {

        if ((SDL_Image) && (SDL_Image->palette))

        {

            for (i=firstcolor; i<firstcolor+ncolors; i++)

            {

                SDL_Image->palette[i]  = 0x00000000UL;

                SDL_Image->palette[i] |= colors[i-firstcolor].r<<16;

                SDL_Image->palette[i] |= colors[i-firstcolor].g<<8;

                SDL_Image->palette[i] |= colors[i-firstcolor].b;

            }

        }

        /* image needs to be redrawed, very slow method */

        PgDrawPhImage(&point, SDL_Image, 0);

    }

    else

    {

        if (desktoppal==SDLPH_PAL_SYSTEM)

        {

            for (i=firstcolor; i<firstcolor+ncolors; i++)

            {

                syspalph[i]  = 0x00000000UL;

                syspalph[i] |= colors[i-firstcolor].r<<16;

                syspalph[i] |= colors[i-firstcolor].g<<8;

                syspalph[i] |= colors[i-firstcolor].b;

            }

            if ((this->screen->flags & SDL_FULLSCREEN) != SDL_FULLSCREEN)

            {

                /* window mode must use soft palette */

                PgSetPalette((PgColor_t*)&syspalph, 0, firstcolor, ncolors, Pg_PALSET_SOFT, 0);

                /* image needs to be redrawed, very slow method */

                PgDrawPhImage(&point, SDL_Image, 0);

            }

            else

            {

                /* fullscreen mode must use hardware palette */

                PgSetPalette((PgColor_t*)&syspalph, 0, firstcolor, ncolors, Pg_PALSET_GLOBAL, 0);

            }

        }

        else

        {

            /* SDLPH_PAL_NONE do nothing */

        }

    }

    return 1;

}

#ifdef HAVE_OPENGL

int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags)

{

    PtArg_t args[8];

    PhDim_t dim;

    uint64_t OGLAttrib[PH_OGL_MAX_ATTRIBS];

    int OGLargc;

    int pargc;

    dim.w=width;

    dim.h=height;

    if (oglctx!=NULL)

    {

       PhDCSetCurrent(NULL);

       PhDCRelease(oglctx);

       oglctx=NULL;

    }

    OGLargc=0;

    if (this->gl_config.depth_size)

    {

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DEPTH_BITS;

        OGLAttrib[OGLargc++]=this->gl_config.depth_size;

    }

    if (this->gl_config.stencil_size)

    {

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_STENCIL_BITS;

        OGLAttrib[OGLargc++]=this->gl_config.stencil_size;

    }

    OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FORCE_SW;

    if (flags & SDL_FULLSCREEN)

    {

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN;

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DIRECT;

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_BEST;

        OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_CENTER;

    }

    OGLAttrib[OGLargc++]=PHOGL_ATTRIB_NONE;

    if (this->gl_config.double_buffer)

    {

        oglctx=PdCreateOpenGLContext(2, &dim, 0, OGLAttrib);

    }

    else

    {

        oglctx=PdCreateOpenGLContext(1, &dim, 0, OGLAttrib);

    }

    if (oglctx==NULL)

    {

        fprintf(stderr,"error: cannot create OpenGL context.\n");

        return (-1);

    }

    PhDCSetCurrent(oglctx);

    pargc=0;

    PtSetArg(&args[pargc++], Pt_ARG_DIM, &dim, 0);

    PtSetArg(&args[pargc++], Pt_ARG_RESIZE_FLAGS, Pt_FALSE, Pt_RESIZE_XY_AS_REQUIRED);

    PtSetArg(&args[pargc++], Pt_ARG_FILL_COLOR, Pg_BLACK, 0);

    if (flags & SDL_FULLSCREEN)

    {

        PhPoint_t pos;

        pos.x=0;

        pos.y=0;

        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_FALSE, ~0);

        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_MANAGED_FLAGS,Pt_TRUE, Ph_WM_FFRONT | Ph_WM_CLOSE | Ph_WM_TOFRONT | Ph_WM_CONSWITCH);

        PtSetArg(&args[pargc++], Pt_ARG_WINDOW_STATE, Pt_TRUE, Ph_WM_STATE_ISFRONT | Ph_WM_STATE_ISFOCUS);

        PtSetArg(&args[pargc++], Pt_ARG_POS, &pos, 0);

    }

    if (window!=NULL)

    {

        PtUnrealizeWidget(window);

        PtDestroyWidget(window);

        window=NULL;

    }

    window=PtCreateWidget(PtWindow, NULL, pargc-1, args);

    PtRealizeWidget(window);

    /* disable mouse for fullscreen */

    if (flags & SDL_FULLSCREEN)

    {

        PhRegion_t region_info;

        region_info.cursor_type=Ph_CURSOR_NONE;

        region_info.rid=PtWidgetRid(window);

        PhRegionChange(Ph_REGION_CURSOR, 0, &region_info, NULL, NULL);

    }

    PtFlush();

    return 0;

}

void ph_GL_SwapBuffers(_THIS)

{

    PgSetRegion(PtWidgetRid(window));

    PdOpenGLContextSwapBuffers(oglctx);

}

int ph_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)

{

    switch (attrib)

    {

        case SDL_GL_DOUBLEBUFFER:

             *value=this->gl_config.double_buffer;

             break;

        case SDL_GL_STENCIL_SIZE:

             *value=this->gl_config.stencil_size;

             break;

        case SDL_GL_DEPTH_SIZE:

             *value=this->gl_config.depth_size;

             break;

        default:

             *value=0;

             return(-1);

    }

    return 0;

}

#endif /* HAVE_OPENGL */