/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2010 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org

    SDL1.3 DirectFB driver by couriersud@arcor.de
	
*/

#include "SDL_DirectFB_video.h"

#include "SDL_DirectFB_events.h"
/*
 * #include "SDL_DirectFB_keyboard.h"
 */
#include "SDL_DirectFB_modes.h"
#include "SDL_DirectFB_mouse.h"
#include "SDL_DirectFB_opengl.h"
#include "SDL_DirectFB_window.h"
#include "SDL_DirectFB_WM.h"


#include "SDL_config.h"

/* DirectFB video driver implementation.
*/

#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>

#include <directfb.h>
#include <directfb_version.h>
#include <directfb_strings.h>

#include "SDL_video.h"
#include "SDL_mouse.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
#include "SDL_DirectFB_video.h"
#include "SDL_DirectFB_events.h"
#include "SDL_DirectFB_render.h"
#include "SDL_DirectFB_mouse.h"
#include "SDL_DirectFB_shape.h"


#include "SDL_DirectFB_dyn.h"

/* Initialization/Query functions */
static int DirectFB_VideoInit(_THIS);
static void DirectFB_VideoQuit(_THIS);

static int DirectFB_Available(void);
static SDL_VideoDevice *DirectFB_CreateDevice(int devindex);

VideoBootStrap DirectFB_bootstrap = {
    "directfb", "DirectFB",
    DirectFB_Available, DirectFB_CreateDevice
};

static const DirectFBSurfaceDrawingFlagsNames(drawing_flags);
static const DirectFBSurfaceBlittingFlagsNames(blitting_flags);
static const DirectFBAccelerationMaskNames(acceleration_mask);

/* DirectFB driver bootstrap functions */

static int
DirectFB_Available(void)
{
    if (!SDL_DirectFB_LoadLibrary())
        return 0;
    SDL_DirectFB_UnLoadLibrary();
    return 1;
}

static void
DirectFB_DeleteDevice(SDL_VideoDevice * device)
{
    SDL_DirectFB_UnLoadLibrary();
    SDL_DFB_FREE(device->driverdata);
    SDL_DFB_FREE(device);
}

static SDL_VideoDevice *
DirectFB_CreateDevice(int devindex)
{
    SDL_VideoDevice *device;

    if (!SDL_DirectFB_LoadLibrary())
        return NULL;

    /* Initialize all variables that we clean on shutdown */
    SDL_DFB_ALLOC_CLEAR(device, sizeof(SDL_VideoDevice));

    /* Set the function pointers */

    /* Set the function pointers */
    device->VideoInit = DirectFB_VideoInit;
    device->VideoQuit = DirectFB_VideoQuit;
    device->GetDisplayModes = DirectFB_GetDisplayModes;
    device->SetDisplayMode = DirectFB_SetDisplayMode;
    device->PumpEvents = DirectFB_PumpEventsWindow;
    device->CreateWindow = DirectFB_CreateWindow;
    device->CreateWindowFrom = DirectFB_CreateWindowFrom;
    device->SetWindowTitle = DirectFB_SetWindowTitle;
    device->SetWindowIcon = DirectFB_SetWindowIcon;
    device->SetWindowPosition = DirectFB_SetWindowPosition;
    device->SetWindowSize = DirectFB_SetWindowSize;
    device->ShowWindow = DirectFB_ShowWindow;
    device->HideWindow = DirectFB_HideWindow;
    device->RaiseWindow = DirectFB_RaiseWindow;
    device->MaximizeWindow = DirectFB_MaximizeWindow;
    device->MinimizeWindow = DirectFB_MinimizeWindow;
    device->RestoreWindow = DirectFB_RestoreWindow;
    device->SetWindowGrab = DirectFB_SetWindowGrab;
    device->DestroyWindow = DirectFB_DestroyWindow;
    device->GetWindowWMInfo = DirectFB_GetWindowWMInfo;

#if SDL_DIRECTFB_OPENGL
    device->GL_LoadLibrary = DirectFB_GL_LoadLibrary;
    device->GL_GetProcAddress = DirectFB_GL_GetProcAddress;
    device->GL_MakeCurrent = DirectFB_GL_MakeCurrent;

    device->GL_CreateContext = DirectFB_GL_CreateContext;
    device->GL_SetSwapInterval = DirectFB_GL_SetSwapInterval;
    device->GL_GetSwapInterval = DirectFB_GL_GetSwapInterval;
    device->GL_SwapWindow = DirectFB_GL_SwapWindow;
    device->GL_DeleteContext = DirectFB_GL_DeleteContext;

#endif

	/* Shaped window support */
	device->shape_driver.CreateShaper = DirectFB_CreateShaper;
	device->shape_driver.SetWindowShape = DirectFB_SetWindowShape;
	device->shape_driver.ResizeWindowShape = DirectFB_ResizeWindowShape;
	
    device->free = DirectFB_DeleteDevice;
    
    return device;
  error:
    if (device)
        free(device);
    return (0);
}

static void
DirectFB_DeviceInformation(IDirectFB * dfb)
{
    DFBGraphicsDeviceDescription desc;
    int n;

    dfb->GetDeviceDescription(dfb, &desc);

    SDL_DFB_LOG( "DirectFB Device Information\n");
    SDL_DFB_LOG( "===========================\n");
    SDL_DFB_LOG( "Name:           %s\n", desc.name);
    SDL_DFB_LOG( "Vendor:         %s\n", desc.vendor);
    SDL_DFB_LOG( "Driver Name:    %s\n", desc.driver.name);
    SDL_DFB_LOG( "Driver Vendor:  %s\n", desc.driver.vendor);
    SDL_DFB_LOG( "Driver Version: %d.%d\n", desc.driver.major,
            desc.driver.minor);

    SDL_DFB_LOG( "\nVideo memoory:  %d\n", desc.video_memory);

    SDL_DFB_LOG( "\nBlitting flags:\n");
    for (n = 0; blitting_flags[n].flag; n++) {
        if (desc.blitting_flags & blitting_flags[n].flag)
            SDL_DFB_LOG( "    %s\n", blitting_flags[n].name);
    }

    SDL_DFB_LOG( "\nDrawing flags:\n");
    for (n = 0; drawing_flags[n].flag; n++) {
        if (desc.drawing_flags & drawing_flags[n].flag)
            SDL_DFB_LOG( "    %s\n", drawing_flags[n].name);
    }


    SDL_DFB_LOG( "\nAcceleration flags:\n");
    for (n = 0; acceleration_mask[n].mask; n++) {
        if (desc.acceleration_mask & acceleration_mask[n].mask)
            SDL_DFB_LOG( "    %s\n", acceleration_mask[n].name);
    }


}

static int readBoolEnv(const char *env_name, int def_val)
{
    char *stemp;

    stemp = SDL_getenv(env_name);
    if (stemp)
        return atoi(stemp);
    else
        return def_val;
}

static int
DirectFB_VideoInit(_THIS)
{
    IDirectFB *dfb = NULL;
    DFB_DeviceData *devdata = NULL;
    DFBResult ret;

    SDL_DFB_ALLOC_CLEAR(devdata, sizeof(*devdata));

    SDL_DFB_CHECKERR(DirectFBInit(NULL, NULL));

    /* avoid switching to the framebuffer when we
     * are running X11 */
    ret = readBoolEnv(DFBENV_USE_X11_CHECK , 1);
    if (ret) {
        if (SDL_getenv("DISPLAY"))
            DirectFBSetOption("system", "x11");
        else
            DirectFBSetOption("disable-module", "x11input");
    }

	/* FIXME: Reenable as default once multi kbd/mouse interface is sorted out */
	devdata->use_linux_input = readBoolEnv(DFBENV_USE_LINUX_INPUT, 0);       /* default: on */

    if (!devdata->use_linux_input)
    {
		SDL_DFB_LOG("Disabling linxu input\n");    
        DirectFBSetOption("disable-module", "linux_input");
    }
    
    SDL_DFB_CHECKERR(DirectFBCreate(&dfb));

    DirectFB_DeviceInformation(dfb);
    
    devdata->use_yuv_underlays = readBoolEnv(DFBENV_USE_YUV_UNDERLAY, 0);     /* default: off */
    devdata->use_yuv_direct = readBoolEnv(DFBENV_USE_YUV_DIRECT, 0);      /* default is off! */

    /* Create global Eventbuffer for axis events */
    if (devdata->use_linux_input) {
        SDL_DFB_CHECKERR(dfb->CreateInputEventBuffer(dfb, DICAPS_ALL,
                                                     DFB_TRUE,
                                                     &devdata->events));
    } else {
        SDL_DFB_CHECKERR(dfb->CreateInputEventBuffer(dfb, DICAPS_AXES
                                                     /*DICAPS_ALL */ ,
                                                     DFB_TRUE,
                                                     &devdata->events));
    }

    /* simple window manager support */
    devdata->has_own_wm = readBoolEnv(DFBENV_USE_WM, 0);

    devdata->initialized = 1;

    devdata->dfb = dfb;
    devdata->firstwin = NULL;
    devdata->grabbed_window = NULL;

    _this->driverdata = devdata;

    DirectFB_InitModes(_this);

#if SDL_DIRECTFB_OPENGL
    DirectFB_GL_Initialize(_this);
#endif

    DirectFB_InitMouse(_this);
    DirectFB_InitKeyboard(_this);

    return 0;


  error:
    SDL_DFB_FREE(devdata);
    SDL_DFB_RELEASE(dfb);
    return -1;
}

static void
DirectFB_VideoQuit(_THIS)
{
    DFB_DeviceData *devdata = (DFB_DeviceData *) _this->driverdata;

    DirectFB_QuitModes(_this);
    DirectFB_QuitKeyboard(_this);
    DirectFB_QuitMouse(_this);

    devdata->events->Reset(devdata->events);
    SDL_DFB_RELEASE(devdata->events);
    SDL_DFB_RELEASE(devdata->dfb);

#if SDL_DIRECTFB_OPENGL
    DirectFB_GL_Shutdown(_this);
#endif

    devdata->initialized = 0;
}

/* DirectFB driver general support functions */

static const struct {
    DFBSurfacePixelFormat dfb;
    Uint32 sdl;
} pixelformat_tab[] = 
{
    { DSPF_RGB32, SDL_PIXELFORMAT_RGB888 },             /* 24 bit RGB (4 byte, nothing@24, red 8@16, green 8@8, blue 8@0) */
    { DSPF_ARGB, SDL_PIXELFORMAT_ARGB8888 },            /* 32 bit ARGB (4 byte, alpha 8@24, red 8@16, green 8@8, blue 8@0) */
    { DSPF_RGB16, SDL_PIXELFORMAT_RGB565 },             /* 16 bit RGB (2 byte, red 5@11, green 6@5, blue 5@0) */
    { DSPF_RGB332, SDL_PIXELFORMAT_RGB332 },            /* 8 bit RGB (1 byte, red 3@5, green 3@2, blue 2@0) */
    { DSPF_ARGB4444, SDL_PIXELFORMAT_ARGB4444 },        /* 16 bit ARGB (2 byte, alpha 4@12, red 4@8, green 4@4, blue 4@0) */
    { DSPF_ARGB1555, SDL_PIXELFORMAT_ARGB1555 },        /* 16 bit ARGB (2 byte, alpha 1@15, red 5@10, green 5@5, blue 5@0) */
    { DSPF_RGB24, SDL_PIXELFORMAT_RGB24 },              /* 24 bit RGB (3 byte, red 8@16, green 8@8, blue 8@0) */
    { DSPF_RGB444, SDL_PIXELFORMAT_RGB444 },            /* 16 bit RGB (2 byte, nothing @12, red 4@8, green 4@4, blue 4@0) */
    { DSPF_YV12, SDL_PIXELFORMAT_YV12 },                /* 12 bit YUV (8 bit Y plane followed by 8 bit quarter size V/U planes) */
    { DSPF_I420,SDL_PIXELFORMAT_IYUV },                 /* 12 bit YUV (8 bit Y plane followed by 8 bit quarter size U/V planes) */
    { DSPF_YUY2, SDL_PIXELFORMAT_YUY2 },                /* 16 bit YUV (4 byte/ 2 pixel, macropixel contains CbYCrY [31:0]) */
    { DSPF_UYVY, SDL_PIXELFORMAT_UYVY },                /* 16 bit YUV (4 byte/ 2 pixel, macropixel contains YCbYCr [31:0]) */
    { DSPF_RGB555, SDL_PIXELFORMAT_RGB555 },            /* 16 bit RGB (2 byte, nothing @15, red 5@10, green 5@5, blue 5@0) */
#if (ENABLE_LUT8)
    { DSPF_LUT8, SDL_PIXELFORMAT_INDEX8 },              /* 8 bit LUT (8 bit color and alpha lookup from palette) */
#endif

#if (DFB_VERSION_ATLEAST(1,2,0))
    { DSPF_BGR555, SDL_PIXELFORMAT_BGR555 },            /* 16 bit BGR (2 byte, nothing @15, blue 5@10, green 5@5, red 5@0) */
#else
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_BGR555 },
#endif

    /* Pfff ... nonmatching formats follow */    
    
    { DSPF_ALUT44, SDL_PIXELFORMAT_UNKNOWN },           /* 8 bit ALUT (1 byte, alpha 4@4, color lookup 4@0) */
 	{ DSPF_A8, SDL_PIXELFORMAT_UNKNOWN },               /* 	8 bit alpha (1 byte, alpha 8@0), e.g. anti-aliased glyphs */
 	{ DSPF_AiRGB, SDL_PIXELFORMAT_UNKNOWN },            /* 	32 bit ARGB (4 byte, inv. alpha 8@24, red 8@16, green 8@8, blue 8@0) */
 	{ DSPF_A1, SDL_PIXELFORMAT_UNKNOWN },               /* 	1 bit alpha (1 byte/ 8 pixel, most significant bit used first) */
 	{ DSPF_NV12, SDL_PIXELFORMAT_UNKNOWN },             /* 	12 bit YUV (8 bit Y plane followed by one 16 bit quarter size CbCr [15:0] plane) */
 	{ DSPF_NV16, SDL_PIXELFORMAT_UNKNOWN },             /* 	16 bit YUV (8 bit Y plane followed by one 16 bit half width CbCr [15:0] plane) */
 	{ DSPF_ARGB2554, SDL_PIXELFORMAT_UNKNOWN },         /* 	16 bit ARGB (2 byte, alpha 2@14, red 5@9, green 5@4, blue 4@0) */
 	{ DSPF_NV21, SDL_PIXELFORMAT_UNKNOWN },             /* 	12 bit YUV (8 bit Y plane followed by one 16 bit quarter size CrCb [15:0] plane) */
 	{ DSPF_AYUV, SDL_PIXELFORMAT_UNKNOWN },             /* 	32 bit AYUV (4 byte, alpha 8@24, Y 8@16, Cb 8@8, Cr 8@0) */
 	{ DSPF_A4, SDL_PIXELFORMAT_UNKNOWN },               /* 	4 bit alpha (1 byte/ 2 pixel, more significant nibble used first) */
 	{ DSPF_ARGB1666, SDL_PIXELFORMAT_UNKNOWN },         /* 	1 bit alpha (3 byte/ alpha 1@18, red 6@16, green 6@6, blue 6@0) */
 	{ DSPF_ARGB6666, SDL_PIXELFORMAT_UNKNOWN },         /* 	6 bit alpha (3 byte/ alpha 6@18, red 6@16, green 6@6, blue 6@0) */
 	{ DSPF_RGB18, SDL_PIXELFORMAT_UNKNOWN },            /* 	6 bit RGB (3 byte/ red 6@16, green 6@6, blue 6@0) */
 	{ DSPF_LUT2, SDL_PIXELFORMAT_UNKNOWN },             /* 	2 bit LUT (1 byte/ 4 pixel, 2 bit color and alpha lookup from palette) */

#if (DFB_VERSION_ATLEAST(1,3,0))
 	{ DSPF_RGBA4444, SDL_PIXELFORMAT_UNKNOWN },         /* 16 bit RGBA (2 byte, red 4@12, green 4@8, blue 4@4, alpha 4@0) */
#endif

#if (DFB_VERSION_ATLEAST(1,4,3))
 	{ DSPF_RGBA5551, SDL_PIXELFORMAT_UNKNOWN },         /* 	16 bit RGBA (2 byte, red 5@11, green 5@6, blue 5@1, alpha 1@0) */
 	{ DSPF_YUV444P, SDL_PIXELFORMAT_UNKNOWN },          /* 	24 bit full YUV planar (8 bit Y plane followed by an 8 bit Cb and an 8 bit Cr plane) */
 	{ DSPF_ARGB8565, SDL_PIXELFORMAT_UNKNOWN },         /* 	24 bit ARGB (3 byte, alpha 8@16, red 5@11, green 6@5, blue 5@0) */
 	{ DSPF_AVYU, SDL_PIXELFORMAT_UNKNOWN },             /* 	32 bit AVYU 4:4:4 (4 byte, alpha 8@24, Cr 8@16, Y 8@8, Cb 8@0) */
 	{ DSPF_VYU, SDL_PIXELFORMAT_UNKNOWN },              /* 	24 bit VYU 4:4:4 (3 byte, Cr 8@16, Y 8@8, Cb 8@0)  */
#endif
 	
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_INDEX1LSB },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_INDEX1MSB },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_INDEX4LSB }, 
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_INDEX4MSB },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_BGR24 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_BGR888 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_RGBA8888 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_ABGR8888 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_BGRA8888 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_ARGB2101010 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_ABGR4444 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_ABGR1555 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_BGR565 },
    { DSPF_UNKNOWN, SDL_PIXELFORMAT_YVYU },                        /**< Packed mode: Y0+V0+Y1+U0 (1 pla	*/
};

Uint32
DirectFB_DFBToSDLPixelFormat(DFBSurfacePixelFormat pixelformat)
{
    int i;
    
    for (i=0; pixelformat_tab[i].dfb != DSPF_UNKNOWN; i++)
        if (pixelformat_tab[i].dfb == pixelformat)
        {
            return pixelformat_tab[i].sdl;
        }
    return SDL_PIXELFORMAT_UNKNOWN;
}

DFBSurfacePixelFormat
DirectFB_SDLToDFBPixelFormat(Uint32 format)
{
    int i;
    
    for (i=0; pixelformat_tab[i].dfb != DSPF_UNKNOWN; i++)
        if (pixelformat_tab[i].sdl == format)
        {
            return pixelformat_tab[i].dfb;
        }
    return DSPF_UNKNOWN;
}

void DirectFB_SetSupportedPixelFormats(SDL_RendererInfo* ri)
{
	int i, j;

    for (i=0, j=0; pixelformat_tab[i].dfb != DSPF_UNKNOWN; i++)
    	if (pixelformat_tab[i].sdl != SDL_PIXELFORMAT_UNKNOWN)
    		ri->texture_formats[j++] = pixelformat_tab[i].sdl;
    ri->num_texture_formats = j;
}