/*
  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_KMSDRMVIDEO_H__
#define __SDL_KMSDRMVIDEO_H__

#include "../SDL_sysvideo.h"

#include <fcntl.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <gbm.h>
#include <assert.h>
#if SDL_VIDEO_OPENGL_EGL
#include <EGL/egl.h>
#include <EGL/eglext.h>
#endif

typedef struct SDL_VideoData
{
    int devindex;               /* device index that was passed on creation */
    int drm_fd;                 /* DRM file desc */
    struct gbm_device *gbm_dev;

    SDL_Window **windows;
    int max_windows;
    int num_windows;
} SDL_VideoData;


typedef struct SDL_DisplayModeData
{
    int mode_index;
} SDL_DisplayModeData;


typedef struct SDL_DisplayData
{

    drmModeModeInfo mode;
    uint32_t plane_id;
    uint32_t crtc_id;
    uint32_t connector_id;

    drmModePlane *plane;
    drmModeObjectProperties *plane_props;
    drmModePropertyRes **plane_props_info;

    drmModeCrtc *crtc;
    drmModeObjectProperties *crtc_props;
    drmModePropertyRes **crtc_props_info;

    drmModeConnector *connector;
    drmModeObjectProperties *connector_props;
    drmModePropertyRes **connector_props_info;

    int kms_in_fence_fd;
    int kms_out_fence_fd;

    EGLSyncKHR kms_fence; /* Signaled when kms completes changes requested in atomic iotcl (pageflip, etc). */
    EGLSyncKHR gpu_fence; /* Signaled when GPU rendering is done. */

    SDL_bool modeset_pending;
} SDL_DisplayData;


typedef struct SDL_WindowData
{
    SDL_VideoData *viddata;
    struct gbm_surface *gs;
    struct gbm_bo *bo;
    struct gbm_bo *next_bo;
    struct gbm_bo *crtc_bo;
#if SDL_VIDEO_OPENGL_EGL
    SDL_bool egl_surface_dirty;
    EGLSurface egl_surface;
#endif
} SDL_WindowData;

typedef struct KMSDRM_FBInfo
{
    int drm_fd;         /* DRM file desc */
    uint32_t fb_id;     /* DRM framebuffer ID */
} KMSDRM_FBInfo;

/* Helper functions */
int KMSDRM_CreateSurfaces(_THIS, SDL_Window * window);
KMSDRM_FBInfo *KMSDRM_FBFromBO(_THIS, struct gbm_bo *bo);
SDL_bool KMSDRM_WaitPageFlip(_THIS, SDL_WindowData *windata, int timeout);

/* Atomic functions that are used from SDL_kmsdrmopengles.c */
int drm_atomic_commit(_THIS, uint32_t fb_id, uint32_t flags);

/****************************************************************************/
/* SDL_VideoDevice functions declaration                                    */
/****************************************************************************/

/* Display and window functions */
int KMSDRM_VideoInit(_THIS);
void KMSDRM_VideoQuit(_THIS);
void KMSDRM_GetDisplayModes(_THIS, SDL_VideoDisplay * display);
int KMSDRM_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
int KMSDRM_CreateWindow(_THIS, SDL_Window * window);
int KMSDRM_CreateWindowFrom(_THIS, SDL_Window * window, const void *data);
void KMSDRM_SetWindowTitle(_THIS, SDL_Window * window);
void KMSDRM_SetWindowIcon(_THIS, SDL_Window * window, SDL_Surface * icon);
void KMSDRM_SetWindowPosition(_THIS, SDL_Window * window);
void KMSDRM_SetWindowSize(_THIS, SDL_Window * window);
void KMSDRM_ShowWindow(_THIS, SDL_Window * window);
void KMSDRM_HideWindow(_THIS, SDL_Window * window);
void KMSDRM_RaiseWindow(_THIS, SDL_Window * window);
void KMSDRM_MaximizeWindow(_THIS, SDL_Window * window);
void KMSDRM_MinimizeWindow(_THIS, SDL_Window * window);
void KMSDRM_RestoreWindow(_THIS, SDL_Window * window);
void KMSDRM_SetWindowGrab(_THIS, SDL_Window * window, SDL_bool grabbed);
void KMSDRM_DestroyWindow(_THIS, SDL_Window * window);

/* Window manager function */
SDL_bool KMSDRM_GetWindowWMInfo(_THIS, SDL_Window * window,
                             struct SDL_SysWMinfo *info);

/* OpenGL/OpenGL ES functions */
int KMSDRM_GLES_LoadLibrary(_THIS, const char *path);
void *KMSDRM_GLES_GetProcAddress(_THIS, const char *proc);
void KMSDRM_GLES_UnloadLibrary(_THIS);
SDL_GLContext KMSDRM_GLES_CreateContext(_THIS, SDL_Window * window);
int KMSDRM_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context);
int KMSDRM_GLES_SetSwapInterval(_THIS, int interval);
int KMSDRM_GLES_GetSwapInterval(_THIS);
int KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window);
void KMSDRM_GLES_DeleteContext(_THIS, SDL_GLContext context);

#endif /* __SDL_KMSDRMVIDEO_H__ */

/* vi: set ts=4 sw=4 expandtab: */