/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

#include "../../SDL_internal.h"

#ifndef SDL_DirectFB_video_h_
#define SDL_DirectFB_video_h_

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

#include "../SDL_sysvideo.h"
#include "SDL_scancode.h"
#include "SDL_render.h"


#define DFB_VERSIONNUM(X, Y, Z)                     \
    ((X)*1000 + (Y)*100 + (Z))

#define DFB_COMPILEDVERSION \
    DFB_VERSIONNUM(DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION, DIRECTFB_MICRO_VERSION)

#define DFB_VERSION_ATLEAST(X, Y, Z) \
    (DFB_COMPILEDVERSION >= DFB_VERSIONNUM(X, Y, Z))

#if (DFB_VERSION_ATLEAST(1,0,0))
#ifdef SDL_VIDEO_OPENGL
#define SDL_DIRECTFB_OPENGL 1
#endif
#else
#error "SDL_DIRECTFB: Please compile against libdirectfb version >= 1.0.0"
#endif

/* Set below to 1 to compile with (old) multi mice/keyboard api. Code left in
 * in case we see this again ...
 */

#define USE_MULTI_API   (0)

/* Support for LUT8/INDEX8 pixel format.
 * This is broken in DirectFB 1.4.3. It works in 1.4.0 and 1.4.5
 * occurred.
 */

#if (DFB_COMPILEDVERSION == DFB_VERSIONNUM(1, 4, 3))
#define ENABLE_LUT8     (0)
#else
#define ENABLE_LUT8     (1)
#endif

#define DIRECTFB_DEBUG 1

#define DFBENV_USE_YUV_UNDERLAY     "SDL_DIRECTFB_YUV_UNDERLAY"     /* Default: off */
#define DFBENV_USE_YUV_DIRECT       "SDL_DIRECTFB_YUV_DIRECT"       /* Default: off */
#define DFBENV_USE_X11_CHECK        "SDL_DIRECTFB_X11_CHECK"        /* Default: on  */
#define DFBENV_USE_LINUX_INPUT      "SDL_DIRECTFB_LINUX_INPUT"      /* Default: on  */
#define DFBENV_USE_WM               "SDL_DIRECTFB_WM"       /* Default: off  */

#define SDL_DFB_RELEASE(x) do { if ( (x) != NULL ) { SDL_DFB_CHECK(x->Release(x)); x = NULL; } } while (0)
#define SDL_DFB_FREE(x) do { SDL_free((x)); (x) = NULL; } while (0)
#define SDL_DFB_UNLOCK(x) do { if ( (x) != NULL ) { x->Unlock(x); } } while (0)

#define SDL_DFB_CONTEXT "SDL_DirectFB"

#define SDL_DFB_ERR(x...) SDL_LogError(SDL_LOG_CATEGORY_ERROR, x)

#if (DIRECTFB_DEBUG)
#define SDL_DFB_LOG(x...) SDL_LogInfo(SDL_LOG_CATEGORY_VIDEO, x)

#define SDL_DFB_DEBUG(x...) SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, x)

static SDL_INLINE DFBResult sdl_dfb_check(DFBResult ret, const char *src_file, int src_line) {
    if (ret != DFB_OK) {
        SDL_DFB_LOG("%s (%d):%s", src_file, src_line, DirectFBErrorString (ret) );
        SDL_SetError("%s:%s", SDL_DFB_CONTEXT, DirectFBErrorString (ret) );
    }
    return ret;
}

#define SDL_DFB_CHECK(x...) do { sdl_dfb_check( x, __FILE__, __LINE__); } while (0)
#define SDL_DFB_CHECKERR(x...) do { if ( sdl_dfb_check( x, __FILE__, __LINE__) != DFB_OK ) goto error; } while (0)

#else

#define SDL_DFB_CHECK(x...) x
#define SDL_DFB_CHECKERR(x...) do { if (x != DFB_OK ) goto error; } while (0)
#define SDL_DFB_LOG(x...) do {} while (0)
#define SDL_DFB_DEBUG(x...) do {} while (0)

#endif


#define SDL_DFB_CALLOC(r, n, s) \
     do {                                           \
          r = SDL_calloc (n, s);                    \
          if (!(r)) {                               \
               SDL_DFB_ERR("Out of memory");        \
               SDL_OutOfMemory();                   \
               goto error;                          \
          }                                         \
     } while (0)

#define SDL_DFB_ALLOC_CLEAR(r, s) SDL_DFB_CALLOC(r, 1, s)

/* Private display data */

#define SDL_DFB_DEVICEDATA(dev)  DFB_DeviceData *devdata = (dev ? (DFB_DeviceData *) ((dev)->driverdata) : NULL)

#define DFB_MAX_SCREENS 10

typedef struct _DFB_KeyboardData DFB_KeyboardData;
struct _DFB_KeyboardData
{
    const SDL_Scancode  *map;       /* keyboard scancode map */
    int             map_size;   /* size of map */
    int             map_adjust; /* index adjust */
    int             is_generic; /* generic keyboard */
    int id;
};

typedef struct _DFB_DeviceData DFB_DeviceData;
struct _DFB_DeviceData
{
    int initialized;

    IDirectFB           *dfb;
    int                 num_mice;
    int                 mouse_id[0x100];
    int                 num_keyboard;
    DFB_KeyboardData    keyboard[10];
    SDL_Window          *firstwin;

    int                 use_yuv_underlays;
    int                 use_yuv_direct;
    int                 use_linux_input;
    int                 has_own_wm;


    /* window grab */
    SDL_Window          *grabbed_window;

    /* global events */
    IDirectFBEventBuffer *events;
};

Uint32 DirectFB_DFBToSDLPixelFormat(DFBSurfacePixelFormat pixelformat);
DFBSurfacePixelFormat DirectFB_SDLToDFBPixelFormat(Uint32 format);
void DirectFB_SetSupportedPixelFormats(SDL_RendererInfo *ri);


#endif /* SDL_DirectFB_video_h_ */