/*
 * Directx v2 or later DirectDraw interface
 *
 * Copyright (c) 2002 - 2005 Sascha Sommer <saschasommer@freenet.de>
 *
 * This file is part of MPlayer.
 *
 * MPlayer 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <windows.h>
#include <windowsx.h>
#include <ddraw.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "libmpcodecs/vf.h"
#include "fastmemcpy.h"
#include "libmpcodecs/vd.h"
#include "mp_msg.h"
#include "aspect.h"
#include "sub/sub.h"
#include "w32_common.h"

static LPDIRECTDRAWCOLORCONTROL g_cc = NULL;            //color control interface
static LPDIRECTDRAW7 g_lpdd = NULL;                 //DirectDraw Object
static LPDIRECTDRAWSURFACE7 g_lpddsPrimary = NULL;   //Primary Surface: viewport through the Desktop
static LPDIRECTDRAWSURFACE7 g_lpddsOverlay = NULL;   //Overlay Surface
static LPDIRECTDRAWSURFACE7 g_lpddsBack    = NULL;   //Back surface
static LPDIRECTDRAWCLIPPER g_lpddclipper;           //clipper object, can only be used without overlay
static DDSURFACEDESC2 ddsdsf;                           //surface descripiton needed for locking
static HINSTANCE hddraw_dll;                        //handle to ddraw.dll
static RECT rd;                                     //rect of our stretched image
static RECT rs;                                     //rect of our source image
static HBRUSH colorbrush = NULL;                    // Handle to colorkey brush
static HBRUSH blackbrush = NULL;                    // Handle to black brush
static uint32_t image_width, image_height;          //image width and height
static uint8_t *image        = NULL;                //image data
static void *tmp_image       = NULL;
static uint32_t image_format = 0;                       //image format
static uint32_t primary_image_format;
static uint32_t vm_height = 0;
static uint32_t vm_width  = 0;
static uint32_t vm_bpp    = 0;
static uint32_t dstride;                            //surface stride
static uint32_t nooverlay = 0;                      //NonOverlay mode
static DWORD destcolorkey;                          //colorkey for our surface
static COLORREF windowcolor = RGB(0, 0, 16);          //windowcolor == colorkey
static int adapter_count    = 0;
static GUID selected_guid;
static GUID *selected_guid_ptr = NULL;

/*****************************************************************************
 * DirectDraw GUIDs.
 * Defining them here allows us to get rid of the dxguid library during
 * the linking stage.
 *****************************************************************************/
#define IID_IDirectDraw7 MP_IID_IDirectDraw7
static const GUID MP_IID_IDirectDraw7 = {
    0x15e65ec0, 0x3b9c, 0x11d2, { 0xb9, 0x2f, 0x00, 0x60, 0x97, 0x97, 0xea, 0x5b }
};

#define IID_IDirectDrawColorControl MP_IID_IDirectDrawColorControl
static const GUID MP_IID_IDirectDrawColorControl = {
    0x4b9f0ee0, 0x0d7e, 0x11d0, { 0x9b, 0x06, 0x00, 0xa0, 0xc9, 0x03, 0xa3, 0xb8 }
};

struct directx_fourcc_caps {
    char img_format_name[6];    //human readable name
    uint32_t img_format;        //as MPlayer image format
    DDPIXELFORMAT g_ddpfOverlay; //as Directx Sourface description
} static const g_ddpf[] = {
    { "YV12 ", IMGFMT_YV12,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('Y', 'V', '1', '2'), 0, 0, 0, 0, 0 } },
    { "I420 ", IMGFMT_I420,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('I', '4', '2', '0'), 0, 0, 0, 0, 0 } }, //yv12 with swapped uv
    { "IYUV ", IMGFMT_IYUV,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('I', 'Y', 'U', 'V'), 0, 0, 0, 0, 0 } }, //same as i420
    { "YVU9 ", IMGFMT_YVU9,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('Y', 'V', 'U', '9'), 0, 0, 0, 0, 0 } },
    { "YUY2 ", IMGFMT_YUY2,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('Y', 'U', 'Y', '2'), 0, 0, 0, 0, 0 } },
    { "UYVY ", IMGFMT_UYVY,  { sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('U', 'Y', 'V', 'Y'), 0, 0, 0, 0, 0 } },
    { "BGR8 ", IMGFMT_BGR8,  { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  8,  0x00000000, 0x00000000, 0x00000000, 0 } },
    { "RGB15", IMGFMT_RGB15, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  16, 0x0000001F, 0x000003E0, 0x00007C00, 0 } }, //RGB 5:5:5
    { "BGR15", IMGFMT_BGR15, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  16, 0x00007C00, 0x000003E0, 0x0000001F, 0 } },
    { "RGB16", IMGFMT_RGB16, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  16, 0x0000001F, 0x000007E0, 0x0000F800, 0 } }, //RGB 5:6:5
    { "BGR16", IMGFMT_BGR16, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  16, 0x0000F800, 0x000007E0, 0x0000001F, 0 } },
    { "RGB24", IMGFMT_RGB24, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  24, 0x000000FF, 0x0000FF00, 0x00FF0000, 0 } },
    { "BGR24", IMGFMT_BGR24, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  24, 0x00FF0000, 0x0000FF00, 0x000000FF, 0 } },
    { "RGB32", IMGFMT_RGB32, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0 } },
    { "BGR32", IMGFMT_BGR32, { sizeof(DDPIXELFORMAT), DDPF_RGB,    0,  32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0 } }
};
#define NUM_FORMATS (sizeof(g_ddpf) / sizeof(g_ddpf[0]))

// what hw supports with corresponding format in g_ddpf
static uint32_t drv_caps[NUM_FORMATS];

static const vo_info_t info = {
    "Directx DDraw YUV/RGB/BGR renderer",
    "directx",
    "Sascha Sommer <saschasommer@freenet.de>",
    ""
};

const LIBVO_EXTERN(directx)

static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
                       unsigned char *srca, int stride)
{
    switch (image_format) {
    case IMGFMT_YV12:
    case IMGFMT_I420:
    case IMGFMT_IYUV:
    case IMGFMT_YVU9:
        vo_draw_alpha_yv12(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + x0, dstride);
        break;
    case IMGFMT_YUY2:
        vo_draw_alpha_yuy2(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 2 * x0, dstride);
        break;
    case IMGFMT_UYVY:
        vo_draw_alpha_yuy2(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 2 * x0 + 1, dstride);
        break;
    case IMGFMT_RGB15:
    case IMGFMT_BGR15:
        vo_draw_alpha_rgb15(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 2 * x0, dstride);
        break;
    case IMGFMT_RGB16:
    case IMGFMT_BGR16:
        vo_draw_alpha_rgb16(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 2 * x0, dstride);
        break;
    case IMGFMT_RGB24:
    case IMGFMT_BGR24:
        vo_draw_alpha_rgb24(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 4 * x0, dstride);
        break;
    case IMGFMT_RGB32:
    case IMGFMT_BGR32:
        vo_draw_alpha_rgb32(w, h, src, srca, stride, ((uint8_t *)image) + dstride * y0 + 4 * x0, dstride);
        break;
    }
}

static void draw_osd(void)
{
    vo_draw_text(image_width, image_height, draw_alpha);
}

static int query_format(uint32_t format)
{
    int i;
    for (i = 0; i < NUM_FORMATS; i++)
        if (g_ddpf[i].img_format == format)
            return drv_caps[i];
    return 0;
}

struct errmap {
    HRESULT err;
    const char *errstr;
} static const dd_errmap[] = {
    {DDERR_INCOMPATIBLEPRIMARY, "incompatible primary surface"},
    {DDERR_INVALIDCAPS, "invalid caps"},
    {DDERR_INVALIDOBJECT, "invalid object"},
    {DDERR_INVALIDPARAMS, "invalid parameters"},
    {DDERR_INVALIDRECT, "invalid rectangle"},
    {DDERR_INVALIDSURFACETYPE, "invalid surfacetype"},
    {DDERR_NODIRECTDRAWHW, "no directdraw hardware"},
    {DDERR_NOEMULATION, "can't emulate"},
    {DDERR_NOFLIPHW, "hardware can't do flip"},
    {DDERR_NOOVERLAYHW, "hardware can't do overlay"},
    {DDERR_NOSTRETCHHW, "hardware can't stretch: try to size the window back"},
    {DDERR_OUTOFMEMORY, "not enough system memory"},
    {DDERR_OUTOFVIDEOMEMORY, "not enough video memory"},
    {DDERR_UNSUPPORTED, "unsupported"},
    {DDERR_UNSUPPORTEDMODE, "unsupported mode"},
    {DDERR_HEIGHTALIGN, "height align"},
    {DDERR_XALIGN, "x align"},
    {DDERR_SURFACELOST, "surfaces lost"},
    {0, NULL}
};

static const char *dd_errstr(HRESULT res)
{
    int i;
    for (i = 0; dd_errmap[i].errstr; i++)
        if (dd_errmap[i].err == res)
            return dd_errmap[i].errstr;
    return "unknown error";
}

static uint32_t Directx_CreatePrimarySurface(void)
{
    DDSURFACEDESC2 ddsd = { .dwSize = sizeof(ddsd) };
    //cleanup
    if (g_lpddsPrimary)
        g_lpddsPrimary->lpVtbl->Release(g_lpddsPrimary);
    g_lpddsPrimary = NULL;

    if (vidmode)
        g_lpdd->lpVtbl->SetDisplayMode(g_lpdd, vm_width, vm_height, vm_bpp, vo_refresh_rate, 0);
    //set flags and create a primary surface.
    ddsd.dwFlags = DDSD_CAPS;
    ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
    if (g_lpdd->lpVtbl->CreateSurface(g_lpdd, &ddsd, &g_lpddsPrimary, NULL) == DD_OK)
        mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>primary surface created\n");
    else {
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>could not create primary surface\n");
        return 1;
    }
    return 0;
}

static uint32_t Directx_CreateOverlay(uint32_t imgfmt)
{
    HRESULT ddrval;
    DDSURFACEDESC2 ddsdOverlay = {
        .dwSize = sizeof(ddsdOverlay),
        .ddsCaps.dwCaps = DDSCAPS_OVERLAY | DDSCAPS_FLIP | DDSCAPS_COMPLEX | DDSCAPS_VIDEOMEMORY,
        .dwFlags  = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_BACKBUFFERCOUNT | DDSD_PIXELFORMAT,
        .dwWidth  = image_width,
        .dwHeight = image_height,
    };
    uint32_t i = 0;
    ddsdOverlay.dwBackBufferCount = 2;
    while (i < NUM_FORMATS && imgfmt != g_ddpf[i].img_format)
        i++;
    if (!g_lpdd || !g_lpddsPrimary || i == NUM_FORMATS)
        return 1;
    //cleanup
    if (g_lpddsOverlay)
        g_lpddsOverlay->lpVtbl->Release(g_lpddsOverlay);
    if (g_lpddsBack)
        g_lpddsBack->lpVtbl->Release(g_lpddsBack);
    g_lpddsOverlay = NULL;
    g_lpddsBack    = NULL;
    //create our overlay
    ddsdOverlay.ddpfPixelFormat   = g_ddpf[i].g_ddpfOverlay;
    if (vo_doublebuffering) {    //tribblebuffering
        if (g_lpdd->lpVtbl->CreateSurface(g_lpdd, &ddsdOverlay, &g_lpddsOverlay, NULL) == DD_OK) {
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>overlay with format %s created\n", g_ddpf[i].img_format_name);
            //get the surface directly attached to the primary (the back buffer)
            ddsdOverlay.ddsCaps.dwCaps = DDSCAPS_BACKBUFFER;
            if (g_lpddsOverlay->lpVtbl->GetAttachedSurface(g_lpddsOverlay, &ddsdOverlay.ddsCaps, &g_lpddsBack) != DD_OK) {
                mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't get attached surface\n");
                return 1;
            }
            return 0;
        }
        vo_doublebuffering = 0;       //disable tribblebuffering
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><WARN>cannot create tribblebuffer overlay with format %s\n", g_ddpf[i].img_format_name);
    }
    //single buffer
    mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>using singlebuffer overlay\n");
    ddsdOverlay.dwBackBufferCount = 0;
    ddsdOverlay.ddsCaps.dwCaps    = DDSCAPS_OVERLAY | DDSCAPS_VIDEOMEMORY;
    ddsdOverlay.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
    ddsdOverlay.ddpfPixelFormat = g_ddpf[i].g_ddpfOverlay;
    // try to create the overlay surface
    ddrval = g_lpdd->lpVtbl->CreateSurface(g_lpdd, &ddsdOverlay, &g_lpddsOverlay, NULL);
    if (ddrval != DD_OK) {
        if (ddrval == DDERR_INVALIDPIXELFORMAT)
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><ERROR> invalid pixelformat: %s\n", g_ddpf[i].img_format_name);
        else
            mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>create surface failed: %s (0x%x)\n", dd_errstr(ddrval), ddrval);
        return 1;
    }
    g_lpddsBack = g_lpddsOverlay;
    return 0;
}

static uint32_t Directx_CreateBackpuffer(void)
{
    DDSURFACEDESC2 ddsd = {
        .dwSize = sizeof(ddsd),
        .ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY,
        .dwFlags  = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT,
        .dwWidth  = image_width,
        .dwHeight = image_height,
    };
    //cleanup
    if (g_lpddsBack)
        g_lpddsBack->lpVtbl->Release(g_lpddsBack);
    g_lpddsBack = NULL;
    if (g_lpdd->lpVtbl->CreateSurface(g_lpdd, &ddsd, &g_lpddsBack, 0) != DD_OK) {
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't create backpuffer\n");
        return 1;
    }
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>backbuffer created\n");
    return 0;
}

static void uninit(void)
{
    if (g_cc)
        g_cc->lpVtbl->Release(g_cc);
    g_cc = NULL;
    if (g_lpddclipper)
        g_lpddclipper->lpVtbl->Release(g_lpddclipper);
    g_lpddclipper = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>clipper released\n");
    if (g_lpddsBack)
        g_lpddsBack->lpVtbl->Release(g_lpddsBack);
    g_lpddsBack = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>back surface released\n");
    if (vo_doublebuffering && !nooverlay) {
        if (g_lpddsOverlay)
            g_lpddsOverlay->lpVtbl->Release(g_lpddsOverlay);
        g_lpddsOverlay = NULL;
        mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>overlay surface released\n");
    }
    if (g_lpddsPrimary)
        g_lpddsPrimary->lpVtbl->Release(g_lpddsPrimary);
    g_lpddsPrimary = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>primary released\n");
    if (colorbrush)
        DeleteObject(colorbrush);
    colorbrush = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>GDI resources deleted\n");
    if (g_lpdd) {
        if (vidmode)
            g_lpdd->lpVtbl->RestoreDisplayMode(g_lpdd);
        g_lpdd->lpVtbl->Release(g_lpdd);
    }
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>directdrawobject released\n");
    FreeLibrary(hddraw_dll);
    hddraw_dll = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>ddraw.dll freed\n");
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>uninitialized\n");
    vo_w32_uninit();
}

static BOOL WINAPI EnumCallbackEx(GUID FAR *lpGUID, LPSTR lpDriverDescription, LPSTR lpDriverName, LPVOID lpContext, HMONITOR hm)
{
    if (!lpGUID)
        lpDriverDescription = "Primary Display Adapter";
    mp_msg(MSGT_VO, MSGL_INFO, "<vo_directx> adapter %d: %s", adapter_count, lpDriverDescription);

    if (adapter_count == vo_adapter_num) {
        if (!lpGUID)
            selected_guid_ptr = NULL;
        else {
            selected_guid     = *lpGUID;
            selected_guid_ptr = &selected_guid;
        }

        mp_msg(MSGT_VO, MSGL_INFO, "\t\t<--");
    }
    mp_msg(MSGT_VO, MSGL_INFO, "\n");

    adapter_count++;

    return 1; // list all adapters
}

static uint32_t Directx_InitDirectDraw(void)
{
    HRESULT (WINAPI *OurDirectDrawCreateEx)(GUID *, LPVOID *, REFIID, IUnknown FAR *);
    DDSURFACEDESC2 ddsd = {
        .dwSize  = sizeof(ddsd),
        .dwFlags = DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT,
    };
    LPDIRECTDRAWENUMERATEEX OurDirectDrawEnumerateEx;

    adapter_count = 0;

    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>Initing DirectDraw\n");

    //load direct draw DLL: based on videolans code
    hddraw_dll = LoadLibrary("DDRAW.DLL");
    if (!hddraw_dll) {
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>failed loading ddraw.dll\n");
        return 1;
    }

    if (vo_adapter_num) {   //display other than default
        OurDirectDrawEnumerateEx = (LPDIRECTDRAWENUMERATEEX)GetProcAddress(hddraw_dll, "DirectDrawEnumerateExA");
        if (!OurDirectDrawEnumerateEx) {
            FreeLibrary(hddraw_dll);
            hddraw_dll = NULL;
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>failed geting proc address: DirectDrawEnumerateEx\n");
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>no directx 7 or higher installed\n");
            return 1;
        }

        // enumerate all display devices attached to the desktop
        OurDirectDrawEnumerateEx(EnumCallbackEx, NULL, DDENUM_ATTACHEDSECONDARYDEVICES);

        if (vo_adapter_num >= adapter_count)
            mp_msg(MSGT_VO, MSGL_ERR, "Selected adapter (%d) doesn't exist: Default Display Adapter selected\n", vo_adapter_num);
    }

    OurDirectDrawCreateEx = (void *)GetProcAddress(hddraw_dll, "DirectDrawCreateEx");
    if (!OurDirectDrawCreateEx) {
        FreeLibrary(hddraw_dll);
        hddraw_dll = NULL;
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>failed geting proc address: DirectDrawCreateEx\n");
        return 1;
    }

    // initialize DirectDraw and create directx v7 object
    if (OurDirectDrawCreateEx(selected_guid_ptr, (VOID **)&g_lpdd, &IID_IDirectDraw7, NULL) != DD_OK) {
        FreeLibrary(hddraw_dll);
        hddraw_dll = NULL;
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't initialize ddraw\n");
        return 1;
    }

    //get current screen siz for selected monitor ...
    g_lpdd->lpVtbl->GetDisplayMode(g_lpdd, &ddsd);
    if (vo_screenwidth && vo_screenheight) {
        vm_height = vo_screenheight;
        vm_width  = vo_screenwidth;
    } else {
        vm_height = ddsd.dwHeight;
        vm_width  = ddsd.dwWidth;
    }

    if (vo_dbpp)
        vm_bpp = vo_dbpp;
    else
        vm_bpp = ddsd.ddpfPixelFormat.dwRGBBitCount;

    if (vidmode) {
        if (g_lpdd->lpVtbl->SetCooperativeLevel(g_lpdd, vo_w32_window, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN) != DD_OK) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't set cooperativelevel for exclusive mode\n");
            return 1;
        }
        /*SetDisplayMode(ddobject,width,height,bpp,refreshrate,aditionalflags)*/
        if (g_lpdd->lpVtbl->SetDisplayMode(g_lpdd, vm_width, vm_height, vm_bpp, 0, 0) != DD_OK) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't set displaymode\n");
            return 1;
        }
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>Initialized adapter %i for %i x %i @ %i \n", vo_adapter_num, vm_width, vm_height, vm_bpp);
        return 0;
    }
    if (g_lpdd->lpVtbl->SetCooperativeLevel(g_lpdd, vo_w32_window, DDSCL_NORMAL) != DD_OK) {   // or DDSCL_SETFOCUSWINDOW
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>could not set cooperativelevel for hardwarecheck\n");
        return 1;
    }
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>DirectDraw Initialized\n");
    return 0;
}

static void clear_window(void)
{
    HDC dc = vo_w32_get_dc(vo_w32_window);
    RECT r;
    GetClientRect(vo_w32_window, &r);
    FillRect(dc, &r, vo_fs || vidmode ? blackbrush : colorbrush);
    vo_w32_release_dc(vo_w32_window, dc);
}

static uint32_t Directx_ManageDisplay(void)
{
    HRESULT ddrval;
    DDCAPS capsDrv = { .dwSize = sizeof(capsDrv) };
    DDOVERLAYFX ovfx = { .dwSize = sizeof(ovfx) };
    DWORD dwUpdateFlags = 0;
    int width, height;

    rd.left = vo_dx - xinerama_x;
    rd.top  = vo_dy - xinerama_y;
    width   = vo_dwidth;
    height  = vo_dheight;

    if (aspect_scaling()) {
        aspect(&width, &height, A_WINZOOM);
        panscan_calc_windowed();
        width   += vo_panscan_x;
        height  += vo_panscan_y;
    }
    rd.left += (vo_dwidth - width) / 2;
    rd.top  += (vo_dheight - height) / 2;

    rd.right  = rd.left + width;
    rd.bottom = rd.top + height;

    if(nooverlay) {
        g_lpddclipper->lpVtbl->SetHWnd(g_lpddclipper, 0, vo_w32_window);
        // clear borders. FIXME: this causes flickering
        if (width < vo_dwidth || height < vo_dheight)
            clear_window();
        // For nooverlay we are done, the blitter can handle
        // a destination RECT larger than the window.
        return 0;
    }
    /*ok, let's workaround some overlay limitations*/
    {
        uint32_t uStretchFactor1000;                 //minimum stretch
        uint32_t xstretch1000, ystretch1000;

        if (!width || !height) {
            // window is minimized, so we should hide the overlay in case
            // colorkeying is not used or working.
            // In addition trying to set width/height to 0 would crash
            g_lpddsOverlay->lpVtbl->UpdateOverlay(g_lpddsOverlay, NULL, g_lpddsPrimary, NULL, DDOVER_HIDE, NULL);
            return 0;
        }

        /*get driver capabilities*/
        if (g_lpdd->lpVtbl->GetCaps(g_lpdd, &capsDrv, NULL) != DD_OK)
            return 1;
        /*get minimum stretch, depends on display adaptor and mode (refresh rate!) */
        uStretchFactor1000 = capsDrv.dwMinOverlayStretch > 1000 ? capsDrv.dwMinOverlayStretch : 1000;
        rd.right  = ((width + rd.left) * uStretchFactor1000 + 999) / 1000;
        rd.bottom = (height + rd.top) * uStretchFactor1000 / 1000;
        /*calculate xstretch1000 and ystretch1000*/
        xstretch1000 = ((rd.right - rd.left) * 1000) / image_width;
        ystretch1000 = ((rd.bottom - rd.top) * 1000) / image_height;
        rs.left      = 0;
        rs.right     = image_width;
        rs.top       = 0;
        rs.bottom    = image_height;
        if (rd.left < 0)
            rs.left = (-rd.left * 1000) / xstretch1000;
        if (rd.top < 0)
            rs.top = (-rd.top * 1000) / ystretch1000;
        if (rd.right > vo_screenwidth)
            rs.right = ((vo_screenwidth - rd.left) * 1000) / xstretch1000;
        if (rd.bottom > vo_screenheight)
            rs.bottom = ((vo_screenheight - rd.top) * 1000) / ystretch1000;
        /*do not allow to zoom or shrink if hardware isn't able to do so*/
        if (width < image_width && !(capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSHRINKX)) {
            if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSHRINKXN)
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can only shrinkN\n");
            else
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can't shrink x\n");
            rd.right = rd.left + image_width;
        } else if (width > image_width && !(capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSTRETCHX)) {
            if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSTRETCHXN)
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can only stretchN\n");
            else
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can't stretch x\n");
            rd.right = rd.left + image_width;
        }
        if (height < image_height && !(capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSHRINKY)) {
            if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSHRINKYN)
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can only shrinkN\n");
            else
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can't shrink y\n");
            rd.bottom = rd.top + image_height;
        } else if (height > image_height && !(capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSTRETCHY)) {
            if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYSTRETCHYN)
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can only stretchN\n");
            else
                mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can't stretch y\n");
            rd.bottom = rd.top + image_height;
        }
        /*the last thing to check are alignment restrictions
         * these expressions (x & -y) just do alignment by dropping low order bits...
         * so to round up, we add first, then truncate*/
        if ((capsDrv.dwCaps & DDCAPS_ALIGNBOUNDARYSRC) && capsDrv.dwAlignBoundarySrc)
            rs.left = (rs.left + capsDrv.dwAlignBoundarySrc / 2) & - (signed)(capsDrv.dwAlignBoundarySrc);
        if ((capsDrv.dwCaps & DDCAPS_ALIGNSIZESRC) && capsDrv.dwAlignSizeSrc)
            rs.right = rs.left + ((rs.right - rs.left + capsDrv.dwAlignSizeSrc / 2) & - (signed)(capsDrv.dwAlignSizeSrc));
        if ((capsDrv.dwCaps & DDCAPS_ALIGNBOUNDARYDEST) && capsDrv.dwAlignBoundaryDest)
            rd.left = (rd.left + capsDrv.dwAlignBoundaryDest / 2) & - (signed)(capsDrv.dwAlignBoundaryDest);
        if ((capsDrv.dwCaps & DDCAPS_ALIGNSIZEDEST) && capsDrv.dwAlignSizeDest)
            rd.right = rd.left + ((rd.right - rd.left) & - (signed)(capsDrv.dwAlignSizeDest));
        /*create an overlay FX structure to specify a destination color key*/
        if (vo_fs || vidmode) {
            ovfx.dckDestColorkey.dwColorSpaceLowValue  = 0;
            ovfx.dckDestColorkey.dwColorSpaceHighValue = 0;
        } else {
            ovfx.dckDestColorkey.dwColorSpaceLowValue  = destcolorkey;
            ovfx.dckDestColorkey.dwColorSpaceHighValue = destcolorkey;
        }
        // set the flags we'll send to UpdateOverlay      //DDOVER_AUTOFLIP|DDOVERFX_MIRRORLEFTRIGHT|DDOVERFX_MIRRORUPDOWN could be useful?;
        dwUpdateFlags = DDOVER_SHOW | DDOVER_DDFX;
        /*if hardware can't do colorkeying set the window on top*/
        if (capsDrv.dwCKeyCaps & DDCKEYCAPS_DESTOVERLAY)
            dwUpdateFlags |= DDOVER_KEYDESTOVERRIDE;
        else if (!tmp_image)
            vo_ontop = 1;
    }

    /*make sure the overlay is inside the screen*/
    rd.top    = FFMAX(rd.top,  0);
    rd.left   = FFMAX(rd.left, 0);
    rd.bottom = FFMIN(rd.bottom, vo_screenheight);
    rd.right  = FFMIN(rd.right,  vo_screenwidth);

    /* Now reconfigure/show the overlay */
//    printf("overlay: %i %i %ix%i\n",rd.left,rd.top,rd.right - rd.left,rd.bottom - rd.top);
    ddrval = g_lpddsOverlay->lpVtbl->UpdateOverlay(g_lpddsOverlay, &rs, g_lpddsPrimary, &rd, dwUpdateFlags, &ovfx);
    if (FAILED(ddrval)) {
        // one cause might be the driver lied about minimum stretch
        // we should try upping the destination size a bit, or
        // perhaps shrinking the source size
        mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>UpdateOverlay failed\n");
        mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>Overlay:x1:%i,y1:%i,x2:%i,y2:%i,w:%i,h:%i\n", rd.left, rd.top, rd.right, rd.bottom, rd.right - rd.left, rd.bottom - rd.top);
        mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>%s (0x%x)\n", dd_errstr(ddrval), ddrval);
        if (ddrval == DDERR_SURFACELOST) {
            g_lpddsOverlay->lpVtbl->Restore(g_lpddsOverlay);                               //restore and try again
            g_lpddsPrimary->lpVtbl->Restore(g_lpddsPrimary);
            ddrval = g_lpddsOverlay->lpVtbl->UpdateOverlay(g_lpddsOverlay, &rs, g_lpddsPrimary, &rd, dwUpdateFlags, &ovfx);
            if (ddrval != DD_OK)
                mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>UpdateOverlay failed again\n");
        }
        /*ok we can't do anything about it -> hide overlay*/
        if (ddrval != DD_OK) {
            ddrval = g_lpddsOverlay->lpVtbl->UpdateOverlay(g_lpddsOverlay, NULL, g_lpddsPrimary, NULL, DDOVER_HIDE, NULL);
            return 1;
        }
    }
    return 0;
}

static void check_events(void)
{
    int evt = vo_w32_check_events();
    if (evt & (VO_EVENT_RESIZE | VO_EVENT_MOVE))
        Directx_ManageDisplay();
    if (evt & (VO_EVENT_RESIZE | VO_EVENT_MOVE | VO_EVENT_EXPOSE))
        clear_window();
}

//find out supported overlay pixelformats
static uint32_t Directx_CheckOverlayPixelformats(void)
{
    DDCAPS capsDrv = { .dwSize = sizeof(capsDrv) };
    HRESULT ddrval;
    DDSURFACEDESC2 ddsdOverlay = {
        .dwSize = sizeof(ddsdOverlay),
        .ddsCaps.dwCaps = DDSCAPS_OVERLAY | DDSCAPS_VIDEOMEMORY,
        .dwFlags  = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT,
        .dwWidth  = 300,
        .dwHeight = 280,
    };
    uint32_t i;
    uint32_t formatcount = 0;
    ddsdOverlay.dwBackBufferCount = 0;
    //get driver caps to determine overlay support
    ddrval = g_lpdd->lpVtbl->GetCaps(g_lpdd, &capsDrv, NULL);
    if (FAILED(ddrval)) {
        mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>failed getting ddrawcaps\n");
        return 1;
    }
    if (!(capsDrv.dwCaps & DDCAPS_OVERLAY)) {
        mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>Your card doesn't support overlay\n");
        return 1;
    }
    mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>testing supported overlay pixelformats\n");
    //it is not possible to query for pixel formats supported by the
    //overlay hardware: try out various formats till one works
    //try to create an overlay surface using one of the pixel formats in our global list
    for (i = 0; i < NUM_FORMATS; i++) {
        ddsdOverlay.ddpfPixelFormat = g_ddpf[i].g_ddpfOverlay;
        ddrval = g_lpdd->lpVtbl->CreateSurface(g_lpdd, &ddsdOverlay, &g_lpddsOverlay, NULL);
        if (ddrval == DD_OK) {
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><FORMAT OVERLAY>%i %s supported\n", i, g_ddpf[i].img_format_name);
            drv_caps[i] = VFCAP_CSP_SUPPORTED | VFCAP_OSD | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_HWSCALE_UP;
            formatcount++;
        } else
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><FORMAT OVERLAY>%i %s not supported\n", i, g_ddpf[i].img_format_name);
        if (g_lpddsOverlay) {
            g_lpddsOverlay->lpVtbl->Release(g_lpddsOverlay);
            g_lpddsOverlay = NULL;
        }
    }
    mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>Your card supports %i of %i overlayformats\n", formatcount, NUM_FORMATS);
    if (formatcount == 0) {
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><WARN>Your card supports overlay, but we couldn't create one\n");
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>This can have the following reasons:\n");
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>- you are already using an overlay with another app\n");
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>- you don't have enough videomemory\n");
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>- vo_directx doesn't support the cards overlay pixelformat\n");
        return 1;
    }
    if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYMIRRORLEFTRIGHT)
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>can mirror left right\n");                                                   //I don't have hardware which
    if (capsDrv.dwFXCaps & DDFXCAPS_OVERLAYMIRRORUPDOWN)
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>can mirror up down\n");                                                      //supports those send me one and I'll implement ;)
    return 0;
}

//find out the Pixelformat of the Primary Surface
static uint32_t Directx_CheckPrimaryPixelformat(void)
{
    int i;
    uint32_t formatcount = 0;
    DDPIXELFORMAT ddpf = { .dwSize = sizeof(ddpf) };
    DDSURFACEDESC2 ddsd;
    HDC hdc;
    HRESULT hres;
    COLORREF rgbT = RGB(0, 0, 0);
    mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>checking primary surface\n");
    //we have to create a primary surface first
    if (Directx_CreatePrimarySurface() != 0)
        return 1;
    if (g_lpddsPrimary->lpVtbl->GetPixelFormat(g_lpddsPrimary, &ddpf) != DD_OK) {
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't get pixelformat\n");
        return 1;
    }
    for (i = 0; i < NUM_FORMATS; i++) {
        if (g_ddpf[i].g_ddpfOverlay.dwRGBBitCount == ddpf.dwRGBBitCount) {
            if (g_ddpf[i].g_ddpfOverlay.dwRBitMask == ddpf.dwRBitMask) {
                mp_msg(MSGT_VO, MSGL_V, "<vo_directx><FORMAT PRIMARY>%i %s supported\n", i, g_ddpf[i].img_format_name);
                drv_caps[i] = VFCAP_CSP_SUPPORTED | VFCAP_OSD;
                formatcount++;
                primary_image_format = g_ddpf[i].img_format;
            }
        }
    }
    //get the colorkey for overlay mode
    destcolorkey = CLR_INVALID;
    if (windowcolor != CLR_INVALID && g_lpddsPrimary->lpVtbl->GetDC(g_lpddsPrimary, &hdc) == DD_OK) {
        rgbT = GetPixel(hdc, 0, 0);
        SetPixel(hdc, 0, 0, windowcolor);
        g_lpddsPrimary->lpVtbl->ReleaseDC(g_lpddsPrimary, hdc);
    }
    // read back the converted color
    ddsd.dwSize = sizeof(ddsd);
    while ((hres = g_lpddsPrimary->lpVtbl->Lock(g_lpddsPrimary, NULL, &ddsd, 0, NULL)) == DDERR_WASSTILLDRAWING)
        ;
    if (hres == DD_OK) {
        destcolorkey = *(DWORD *)ddsd.lpSurface;
        if (ddsd.ddpfPixelFormat.dwRGBBitCount < 32)
            destcolorkey &= (1 << ddsd.ddpfPixelFormat.dwRGBBitCount) - 1;
        g_lpddsPrimary->lpVtbl->Unlock(g_lpddsPrimary, NULL);
    }
    if (windowcolor != CLR_INVALID && g_lpddsPrimary->lpVtbl->GetDC(g_lpddsPrimary, &hdc) == DD_OK) {
        SetPixel(hdc, 0, 0, rgbT);
        g_lpddsPrimary->lpVtbl->ReleaseDC(g_lpddsPrimary, hdc);
    }
    //release primary
    g_lpddsPrimary->lpVtbl->Release(g_lpddsPrimary);
    g_lpddsPrimary = NULL;
    if (formatcount == 0) {
        mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>Unknown Pixelformat\n");
        return 1;
    }
    return 0;
}

static int preinit(const char *arg)
{
    if (arg) {
        if (strstr(arg, "noaccel")) {
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>disabled overlay\n");
            nooverlay = 1;
        }
    }

    windowcolor = vo_colorkey;
    colorbrush  = CreateSolidBrush(windowcolor);
    blackbrush  = (HBRUSH)GetStockObject(BLACK_BRUSH);
    if (!vo_w32_init())
        return 1;
    if (!vo_w32_config(100, 100, VOFLAG_HIDDEN))
        return 1;

    if (Directx_InitDirectDraw() != 0)
        return 1;                                           //init DirectDraw

    if (Directx_CheckPrimaryPixelformat() != 0)
        return 1;
    if (!nooverlay && Directx_CheckOverlayPixelformats() == 0) {          //check for supported hardware
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>hardware supports overlay\n");
        nooverlay = 0;
    } else {   //if we can't have overlay we create a backpuffer with the same imageformat as the primary surface
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>using backpuffer\n");
        nooverlay = 1;
    }
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>preinit succesfully finished\n");
    return 0;
}

static int draw_slice(uint8_t *src[], int stride[], int w, int h, int x, int y)
{
    uint8_t *s;
    uint8_t *d;
    uint32_t uvstride = dstride / 2;
    // copy Y
    d = image + dstride * y + x;
    s = src[0];
    mem2agpcpy_pic(d, s, w, h, dstride, stride[0]);

    w /= 2;
    h /= 2;
    x /= 2;
    y /= 2;

    // copy U
    d = image + dstride * image_height + uvstride * y + x;
    if (image_format == IMGFMT_YV12)
        s = src[2];
    else
        s = src[1];
    mem2agpcpy_pic(d, s, w, h, uvstride, stride[1]);

    // copy V
    d = image + dstride * image_height + uvstride * (image_height / 2) + uvstride * y + x;
    if (image_format == IMGFMT_YV12)
        s = src[1];
    else
        s = src[2];
    mem2agpcpy_pic(d, s, w, h, uvstride, stride[2]);
    return 0;
}

static void flip_page(void)
{
    HRESULT dxresult;
    g_lpddsBack->lpVtbl->Unlock(g_lpddsBack, NULL);
    if (vo_doublebuffering) {
        // flip to the next image in the sequence
        dxresult = g_lpddsOverlay->lpVtbl->Flip(g_lpddsOverlay, NULL, DDFLIP_WAIT);
        if (dxresult == DDERR_SURFACELOST) {
            mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR><vo_directx><INFO>Restoring Surface\n");
            g_lpddsBack->lpVtbl->Restore(g_lpddsBack);
            // restore overlay and primary before calling
            // Directx_ManageDisplay() to avoid error messages
            g_lpddsOverlay->lpVtbl->Restore(g_lpddsOverlay);
            g_lpddsPrimary->lpVtbl->Restore(g_lpddsPrimary);
            // update overlay in case we return from screensaver
            Directx_ManageDisplay();
            dxresult = g_lpddsOverlay->lpVtbl->Flip(g_lpddsOverlay, NULL, DDFLIP_WAIT);
        }
        if (dxresult != DD_OK)
            mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>can't flip page\n");
    }
    if (nooverlay) {
        // ask for the "NOTEARING" option
        DDBLTFX ddbltfx = {
            .dwSize = sizeof(ddbltfx),
            .dwDDFX = DDBLTFX_NOTEARING,
        };
        g_lpddsPrimary->lpVtbl->Blt(g_lpddsPrimary, &rd, g_lpddsBack, NULL, DDBLT_WAIT, &ddbltfx);
    }
    if (g_lpddsBack->lpVtbl->Lock(g_lpddsBack, NULL, &ddsdsf, DDLOCK_NOSYSLOCK | DDLOCK_WAIT, NULL) == DD_OK) {
        if (vo_directrendering && (dstride != ddsdsf.lPitch)) {
            mp_msg(MSGT_VO, MSGL_WARN, "<vo_directx><WARN>stride changed !!!! disabling direct rendering\n");
            vo_directrendering = 0;
        }
        free(tmp_image);
        tmp_image = NULL;
        dstride   = ddsdsf.lPitch;
        image     = ddsdsf.lpSurface;
    } else if (!tmp_image) {
        mp_msg(MSGT_VO, MSGL_WARN, "<vo_directx><WARN>Locking the surface failed, rendering to a hidden surface!\n");
        tmp_image = image = calloc(1, image_height * dstride * 2);
    }
}

static int draw_frame(uint8_t *src[])
{
    fast_memcpy(image, *src, dstride * image_height);
    return 0;
}

static uint32_t get_image(mp_image_t *mpi)
{
    if (mpi->flags & MP_IMGFLAG_READABLE) {
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><ERROR>slow video ram\n");
        return VO_FALSE;
    }
    if (mpi->type == MP_IMGTYPE_STATIC) {
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><ERROR>not static\n");
        return VO_FALSE;
    }
    if (mpi->width == dstride || (mpi->flags & (MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_ACCEPT_WIDTH))) {
        if (mpi->flags & MP_IMGFLAG_PLANAR) {
            if (image_format == IMGFMT_YV12) {
                mpi->planes[2] = image + dstride * image_height;
                mpi->planes[1] = image + dstride * image_height + dstride * image_height / 4;
                mpi->stride[1] = mpi->stride[2] = dstride / 2;
            } else if (image_format == IMGFMT_IYUV || image_format == IMGFMT_I420) {
                mpi->planes[1] = image + dstride * image_height;
                mpi->planes[2] = image + dstride * image_height + dstride * image_height / 4;
                mpi->stride[1] = mpi->stride[2] = dstride / 2;
            } else if (image_format == IMGFMT_YVU9) {
                mpi->planes[2] = image + dstride * image_height;
                mpi->planes[1] = image + dstride * image_height + dstride * image_height / 16;
                mpi->stride[1] = mpi->stride[2] = dstride / 4;
            }
        }
        mpi->planes[0] = image;
        mpi->stride[0] = dstride;
        mpi->width     = image_width;
        mpi->height    = image_height;
        mpi->flags    |= MP_IMGFLAG_DIRECT;
        mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>Direct Rendering ENABLED\n");
        return VO_TRUE;
    }
    return VO_FALSE;
}

static uint32_t put_image(mp_image_t *mpi)
{
    uint8_t *d;
    uint8_t *s;
    uint32_t x = mpi->x;
    uint32_t y = mpi->y;
    uint32_t w = mpi->w;
    uint32_t h = mpi->h;

    if ((mpi->flags & MP_IMGFLAG_DIRECT) || (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)) {
        mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>put_image: nothing to do: drawslices\n");
        return VO_TRUE;
    }

    if (mpi->flags & MP_IMGFLAG_PLANAR) {
        if (image_format != IMGFMT_YVU9)
            draw_slice(mpi->planes, mpi->stride, mpi->w, mpi->h, 0, 0);
        else {
            // copy Y
            d = image + dstride * y + x;
            s = mpi->planes[0];
            mem2agpcpy_pic(d, s, w, h, dstride, mpi->stride[0]);
            w /= 4;
            h /= 4;
            x /= 4;
            y /= 4;
            // copy V
            d = image + dstride * image_height + dstride * y / 4 + x;
            s = mpi->planes[2];
            mem2agpcpy_pic(d, s, w, h, dstride / 4, mpi->stride[1]);
            // copy U
            d = image + dstride * image_height + dstride * image_height / 16 + dstride / 4 * y + x;
            s = mpi->planes[1];
            mem2agpcpy_pic(d, s, w, h, dstride / 4, mpi->stride[2]);
        }
    } else { //packed
        mem2agpcpy_pic(image, mpi->planes[0], w * (mpi->bpp / 8), h, dstride, mpi->stride[0]);
    }
    return VO_TRUE;
}

static int config(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t options, char *title, uint32_t format)
{
    image_format = format;
    image_width  = width;
    image_height = height;
    if (format != primary_image_format)
        nooverlay = 0;

    /*release all directx objects*/
    if (g_cc)
        g_cc->lpVtbl->Release(g_cc);
    g_cc = NULL;
    if (g_lpddclipper)
        g_lpddclipper->lpVtbl->Release(g_lpddclipper);
    g_lpddclipper = NULL;
    if (g_lpddsBack)
        g_lpddsBack->lpVtbl->Release(g_lpddsBack);
    g_lpddsBack = NULL;
    if (vo_doublebuffering)
        if (g_lpddsOverlay)
            g_lpddsOverlay->lpVtbl->Release(g_lpddsOverlay);
    g_lpddsOverlay = NULL;
    if (g_lpddsPrimary)
        g_lpddsPrimary->lpVtbl->Release(g_lpddsPrimary);
    g_lpddsPrimary = NULL;
    mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>overlay surfaces released\n");

    if (!vo_w32_config(d_width, d_height, options))
        return 1;

    /*create the surfaces*/
    if (Directx_CreatePrimarySurface())
        return 1;

    //create palette for 256 color mode
    if (image_format == IMGFMT_BGR8) {
        LPDIRECTDRAWPALETTE ddpalette = NULL;
        LPPALETTEENTRY palette = calloc(256, sizeof(*palette));
        int i;
        for (i = 0; i < 256; i++) {
            palette[i].peRed   = ((i >> 5) & 0x07) * 255 / 7;
            palette[i].peGreen = ((i >> 2) & 0x07) * 255 / 7;
            palette[i].peBlue  = ((i >> 0) & 0x03) * 255 / 3;
            palette[i].peFlags = PC_NOCOLLAPSE;
        }
        g_lpdd->lpVtbl->CreatePalette(g_lpdd, DDPCAPS_8BIT | DDPCAPS_INITIALIZE, palette, &ddpalette, NULL);
        g_lpddsPrimary->lpVtbl->SetPalette(g_lpddsPrimary, ddpalette);
        free(palette);
        ddpalette->lpVtbl->Release(ddpalette);
    }

    if (!nooverlay && Directx_CreateOverlay(image_format)) {
        if (format == primary_image_format)
            nooverlay = 1;                                             /*overlay creation failed*/
        else {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't use overlay mode: please use -vo directx:noaccel\n");
            return 1;
        }
    }
    if (nooverlay) {
        if (Directx_CreateBackpuffer()) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't get the driver to work on your system :(\n");
            return 1;
        }
        mp_msg(MSGT_VO, MSGL_V, "<vo_directx><INFO>back surface created\n");
        vo_doublebuffering = 0;
        /*create clipper for nonoverlay mode*/
        if (g_lpdd->lpVtbl->CreateClipper(g_lpdd, 0, &g_lpddclipper, NULL) != DD_OK) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't create clipper\n");
            return 1;
        }
        if (g_lpddclipper->lpVtbl->SetHWnd(g_lpddclipper, 0, vo_w32_window) != DD_OK) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't associate clipper with window\n");
            return 1;
        }
        if (g_lpddsPrimary->lpVtbl->SetClipper(g_lpddsPrimary, g_lpddclipper) != DD_OK) {
            mp_msg(MSGT_VO, MSGL_FATAL, "<vo_directx><FATAL ERROR>can't associate primary surface with clipper\n");
            return 1;
        }
        mp_msg(MSGT_VO, MSGL_DBG3, "<vo_directx><INFO>clipper succesfully created\n");
    } else {
        if (DD_OK != g_lpddsOverlay->lpVtbl->QueryInterface(g_lpddsOverlay, &IID_IDirectDrawColorControl, (void **)&g_cc))
            mp_msg(MSGT_VO, MSGL_V, "<vo_directx><WARN>unable to get DirectDraw ColorControl interface\n");
    }
    Directx_ManageDisplay();
    memset(&ddsdsf, 0, sizeof(DDSURFACEDESC2));
    ddsdsf.dwSize = sizeof(DDSURFACEDESC2);
    if (g_lpddsBack->lpVtbl->Lock(g_lpddsBack, NULL, &ddsdsf, DDLOCK_NOSYSLOCK | DDLOCK_WAIT, NULL) == DD_OK) {
        dstride = ddsdsf.lPitch;
        image   = ddsdsf.lpSurface;
        return 0;
    }
    mp_msg(MSGT_VO, MSGL_V, "<vo_directx><ERROR>Initial Lock on the Surface failed.\n");
    return 1;
}

//function to set color controls
//  brightness	[0, 10000]
//  contrast	[0, 20000]
//  hue		[-180, 180]
//  saturation	[0, 20000]
static uint32_t color_ctrl_set(const char *what, int value)
{
    uint32_t r = VO_NOTIMPL;
    DDCOLORCONTROL dcc = { .dwSize = sizeof(dcc) };
    //printf("\n*** %s = %d\n", what, value);
    if (!g_cc) {
        //printf("\n *** could not get color control interface!!!\n");
        return VO_NOTIMPL;
    }

    if (!strcmp(what, "brightness")) {
        dcc.dwFlags     = DDCOLOR_BRIGHTNESS;
        dcc.lBrightness = (value + 100) * 10000 / 200;
        r = VO_TRUE;
    } else if (!strcmp(what, "contrast")) {
        dcc.dwFlags   = DDCOLOR_CONTRAST;
        dcc.lContrast = (value + 100) * 20000 / 200;
        r = VO_TRUE;
    } else if (!strcmp(what, "hue")) {
        dcc.dwFlags = DDCOLOR_HUE;
        dcc.lHue    = value * 180 / 100;
        r = VO_TRUE;
    } else if (!strcmp(what, "saturation")) {
        dcc.dwFlags     = DDCOLOR_SATURATION;
        dcc.lSaturation = (value + 100) * 20000 / 200;
        r = VO_TRUE;
    }

    if (r == VO_TRUE) {
        g_cc->lpVtbl->SetColorControls(g_cc, &dcc);
    }
    return r;
}

//analoguous to color_ctrl_set
static uint32_t color_ctrl_get(const char *what, int *value)
{
    uint32_t r = VO_NOTIMPL;
    DDCOLORCONTROL dcc = { .dwSize = sizeof(dcc) };
    if (!g_cc) {
        //printf("\n *** could not get color control interface!!!\n");
        return VO_NOTIMPL;
    }

    if (g_cc->lpVtbl->GetColorControls(g_cc, &dcc) != DD_OK) {
        return r;
    }

    if (!strcmp(what, "brightness") && (dcc.dwFlags & DDCOLOR_BRIGHTNESS)) {
        *value = dcc.lBrightness * 200 / 10000 - 100;
        r      = VO_TRUE;
    } else if (!strcmp(what, "contrast") && (dcc.dwFlags & DDCOLOR_CONTRAST)) {
        *value = dcc.lContrast * 200 / 20000 - 100;
        r      = VO_TRUE;
    } else if (!strcmp(what, "hue") && (dcc.dwFlags & DDCOLOR_HUE)) {
        *value = dcc.lHue * 100 / 180;
        r      = VO_TRUE;
    } else if (!strcmp(what, "saturation") && (dcc.dwFlags & DDCOLOR_SATURATION)) {
        *value = dcc.lSaturation * 200 / 20000 - 100;
        r      = VO_TRUE;
    }
//	printf("\n*** %s = %d\n", what, *value);

    return r;
}

static int control(uint32_t request, void *data)
{
    switch (request) {
    case VOCTRL_GET_IMAGE:
        return get_image(data);
    case VOCTRL_QUERY_FORMAT:
        return query_format(*(uint32_t *)data);
    case VOCTRL_DRAW_IMAGE:
        return put_image(data);
    case VOCTRL_BORDER:
        vo_w32_border();
        Directx_ManageDisplay();
        return VO_TRUE;
    case VOCTRL_ONTOP:
        vo_w32_ontop();
        return VO_TRUE;
    case VOCTRL_ROOTWIN:
        if (WinID != -1)
            return VO_TRUE;
        if (vidmode) {
            mp_msg(MSGT_VO, MSGL_ERR, "<vo_directx><ERROR>rootwin has no meaning in exclusive mode\n");
        } else {
            if (vo_rootwin)
                vo_rootwin = 0;
            else
                vo_rootwin = 1;
            Directx_ManageDisplay();
        }
        return VO_TRUE;
    case VOCTRL_FULLSCREEN:
        vo_w32_fullscreen();
        Directx_ManageDisplay();
        return VO_TRUE;
    case VOCTRL_GUISUPPORT:
        return VO_TRUE;
    case VOCTRL_GET_PANSCAN:
        return VO_TRUE;
    case VOCTRL_SET_PANSCAN:
        Directx_ManageDisplay();
        return VO_TRUE;
    case VOCTRL_SET_EQUALIZER: {
        vf_equalizer_t *eq = data;
        return color_ctrl_set(eq->item, eq->value);
    }
    case VOCTRL_GET_EQUALIZER: {
        vf_equalizer_t *eq = data;
        return color_ctrl_get(eq->item, &eq->value);
    }
    case VOCTRL_UPDATE_SCREENINFO:
        w32_update_xinerama_info();
        return VO_TRUE;
    }
    return VO_NOTIMPL;
}
