/*
  vo_ggi.c - General Graphics Interface (GGI) Renderer for MPlayer

  (C) Alex Beregszaszi

  Uses libGGI - http://www.ggi-project.org/

  TODO:
   * implement gamma handling (VAA isn't obsoleted?)

  Thanks to Andreas Beck for his patches.

  Many thanks to Atmosfear, he hacked this driver to work with Planar
  formats, and he fixed the RGB handling.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include "mp_msg.h"

#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"

#include "mp_fifo.h"

#include <ggi/ggi.h>

#ifdef HAVE_GGIWMH
#include <ggi/wmh.h>
#endif

/* maximum buffers */
#undef GGI_FLIP

static const vo_info_t info =
{
    "General Graphics Interface (GGI) output",
    "ggi",
    "Alex Beregszaszi",
    "major"
};

const LIBVO_EXTERN(ggi)


static struct ggi_conf_s {
    char *driver;

    ggi_visual_t vis;
    ggi_visual_t drawvis;

    /* source image format */
    int srcwidth;
    int srcheight;
    int srcformat;
    int srcdepth;
    int srcbpp;

    /* dirty region */
    struct {
        int x1, y1;
        int x2, y2;
    } flushregion;

    int voflags;

    int depthonscreen;
} ggi_conf;


#ifdef HAVE_GGIWMH
static void window_ontop(void)
{
    mp_msg(MSGT_VO, MSGL_V, "[ggi] debug: window_ontop() called\n");
    ggiWmhZOrder(ggi_conf.vis, ZO_TOP);
    return;
}
#endif


static void set_graphtype(uint32_t format, ggi_mode *mode)
{
    switch (format) {
    case IMGFMT_RGB4:
        mode->graphtype = GT_4BIT;
        break;
    case IMGFMT_BGR4:
        mode->graphtype = GT_4BIT;
        GT_SETSUBSCHEME(mode->graphtype, GT_SUB_HIGHBIT_RIGHT);
        break;
    case IMGFMT_RGB8:
    case IMGFMT_BGR8:
        mode->graphtype = GT_8BIT;
        break;
    case IMGFMT_RGB15:
    case IMGFMT_BGR15:
        mode->graphtype = GT_15BIT;
        break;
    case IMGFMT_RGB16:
    case IMGFMT_BGR16:
        mode->graphtype = GT_16BIT;
        break;
    case IMGFMT_RGB24:
    case IMGFMT_BGR24:
        mode->graphtype = GT_24BIT;
        break;
    case IMGFMT_RGB32:
    case IMGFMT_BGR32:
        mode->graphtype = GT_32BIT;
        break;
    }

    return;
}

static int config(uint32_t width, uint32_t height, uint32_t d_width,
                  uint32_t d_height, uint32_t flags, char *title,
                  uint32_t format)
{
    ggi_mode mode = {
        1,                      /* frames */
        {width, height},        /* visible */
        {GGI_AUTO, GGI_AUTO},   /* virt */
        {GGI_AUTO, GGI_AUTO},   /* size */
        GT_AUTO,                /* graphtype */
        {GGI_AUTO, GGI_AUTO}    /* dots per pixel */
    };


    set_graphtype(format, &mode);

#if 0
    printf("[ggi] mode: ");
    ggiPrintMode(&mode);
    printf("\n");
#endif

    ggiCheckMode(ggi_conf.vis, &mode);

    if (ggiSetMode(ggi_conf.vis, &mode) < 0) {
        mp_msg(MSGT_VO, MSGL_ERR, "[ggi] unable to set display mode\n");
        return (-1);
    }
    if (ggiGetMode(ggi_conf.vis, &mode) < 0) {
        mp_msg(MSGT_VO, MSGL_ERR, "[ggi] unable to get display mode\n");
        return (-1);
    }
    if ((mode.graphtype == GT_INVALID)
       || (mode.graphtype == GT_AUTO))
    {
        mp_msg(MSGT_VO, MSGL_ERR, "[ggi] not supported depth/bpp\n");
        return (-1);
    }

#if 0
    printf("[ggi] mode: ");
    ggiPrintMode(&mode);
    printf("\n");
#endif


#ifdef HAVE_GGIWMH
    ggiWmhSetTitle(ggi_conf.vis, title);
    if (vo_ontop) window_ontop();
#endif

    ggiSetFlags(ggi_conf.vis, GGIFLAG_ASYNC);

    if (GT_SCHEME(mode.graphtype) == GT_PALETTE)
        ggiSetColorfulPalette(ggi_conf.vis);

    if (GT_SCHEME(mode.graphtype) != GT_TRUECOLOR) {
        ggi_mode drawmode;

        ggi_conf.drawvis = ggiOpen("display-memory", NULL);
        if (ggi_conf.drawvis == NULL) {
            mp_msg(MSGT_VO, MSGL_ERR,
                   "[ggi] unable to get backbuffer for conversion\n");
            return -1;
        }
        memcpy(&drawmode, &mode, sizeof(ggi_mode));
        drawmode.graphtype = GT_32BIT;
        drawmode.size.x = GGI_AUTO;
        drawmode.size.y = GGI_AUTO;
        ggiCheckMode(ggi_conf.drawvis, &drawmode);
        if (ggiSetMode(ggi_conf.drawvis, &drawmode) < 0) {
            mp_msg(MSGT_VO, MSGL_ERR,
                   "[ggi] unable to set backbuffer mode\n");
            return -1;
        }
        mode.graphtype = drawmode.graphtype;

        ggiSetFlags(ggi_conf.drawvis, GGIFLAG_ASYNC);
    }
    ggi_conf.depthonscreen = GT_DEPTH(mode.graphtype);
    vo_screenwidth = mode.virt.x;
    vo_screenheight = mode.virt.y;

    vo_dwidth = width;
    vo_dheight = height;
    vo_dbpp = GT_SIZE(mode.graphtype);


    /* calculate top, left corner */
    vo_dx = (vo_screenwidth - vo_dwidth) / 2;
    vo_dy = (vo_screenheight - vo_dheight) / 2;


    ggi_conf.srcwidth = width;
    ggi_conf.srcheight = height;
    ggi_conf.srcformat = format;

    ggi_conf.voflags = flags;

    if (IMGFMT_IS_RGB(ggi_conf.srcformat)) {
        ggi_conf.srcdepth = IMGFMT_RGB_DEPTH(ggi_conf.srcformat);
    } else if (IMGFMT_IS_BGR(ggi_conf.srcformat)) {
        ggi_conf.srcdepth = IMGFMT_BGR_DEPTH(ggi_conf.srcformat);
    } else {
        mp_msg(MSGT_VO, MSGL_FATAL, "[ggi] Unknown image format: %s\n",
               vo_format_name(ggi_conf.srcformat));
        return (-1);
    }

    mp_msg(MSGT_VO, MSGL_INFO, "[ggi] input: %dx%dx%d, output: %dx%dx%d\n",
           ggi_conf.srcwidth, ggi_conf.srcheight, ggi_conf.srcdepth,
           mode.virt.x, mode.virt.y, vo_dbpp);

    ggi_conf.srcbpp = (ggi_conf.srcdepth + 7) / 8;

    ggi_conf.flushregion.x1 = vo_dx;
    ggi_conf.flushregion.y1 = vo_dy;
    ggi_conf.flushregion.x2 = vo_dwidth;
    ggi_conf.flushregion.y2 = vo_dheight;

    return (0);
}

static uint32_t get_image(mp_image_t *mpi)
{
    /* GGI DirectRendering supports (yet) only BGR/RGB modes */
    if (!((IMGFMT_IS_BGR(mpi->imgfmt)) &&
        (IMGFMT_BGR_DEPTH(mpi->imgfmt) == vo_dbpp)))
    {
        return (VO_FALSE);
    }

    if (!((IMGFMT_IS_RGB(mpi->imgfmt)) &&
        (IMGFMT_RGB_DEPTH(mpi->imgfmt) == vo_dbpp)))
    {
        return (VO_FALSE);
    }

    if (!((mpi->width == ggi_conf.srcwidth) &&
        (mpi->height == ggi_conf.srcheight)))
    {
        return (VO_FALSE);
    }

    mpi->planes[1] = mpi->planes[2] = NULL;
    mpi->stride[1] = mpi->stride[2] = 0;

    mpi->planes[0] = NULL;
    mpi->stride[0] = ggi_conf.srcwidth * ggi_conf.srcbpp;
    mpi->flags |= MP_IMGFLAG_DIRECT;

#ifdef GGI_FLIP
    if (ggi_conf.voflags & VOFLAG_FLIPPING) {
        mpi->stride[0] = -mpi->stride[0];
    }
#endif

    return (VO_TRUE);
}


static int draw_frame(uint8_t *src[])
{
    ggiPutBox(ggi_conf.drawvis, vo_dx, vo_dy,
              vo_dwidth, vo_dheight, src[0]);

    ggi_conf.flushregion.x1 = vo_dx;
    ggi_conf.flushregion.y1 = vo_dy;
    ggi_conf.flushregion.x2 = vo_dwidth;
    ggi_conf.flushregion.y2 = vo_dheight;

    return (0);
}

static void draw_osd(void)
{
    return;
}

static void flip_page(void)
{
    if (ggi_conf.drawvis != ggi_conf.vis) {
#if 0
        ggiFlushRegion(ggi_conf.drawvis,
                       ggi_conf.flushregion.x1, ggi_conf.flushregion.y1,
                       ggi_conf.flushregion.x2 - ggi_conf.flushregion.x1,
                       ggi_conf.flushregion.y2 - ggi_conf.flushregion.y1);
#endif
        ggiCrossBlit(ggi_conf.drawvis,
                     ggi_conf.flushregion.x1, ggi_conf.flushregion.y1,
                     ggi_conf.flushregion.x2 - ggi_conf.flushregion.x1,
                     ggi_conf.flushregion.y2 - ggi_conf.flushregion.y1,
                     ggi_conf.vis,
                     ggi_conf.flushregion.x1, ggi_conf.flushregion.y1);

    }
    ggiFlushRegion(ggi_conf.vis,
                   ggi_conf.flushregion.x1, ggi_conf.flushregion.y1,
                   ggi_conf.flushregion.x2 - ggi_conf.flushregion.x1,
                   ggi_conf.flushregion.y2 - ggi_conf.flushregion.y1);

    ggi_conf.flushregion.x1 = ggi_conf.flushregion.x2 = -1;
    ggi_conf.flushregion.y1 = ggi_conf.flushregion.y2 = -1;
}

static int draw_slice(uint8_t *src[], int stride[],
                      int w, int h, int x, int y)
{
    ggiPutBox(ggi_conf.drawvis, vo_dx + x, vo_dy + y, w, h, src[0]);

    if ((ggi_conf.flushregion.x1 == -1) ||
        ((vo_dx + x) < ggi_conf.flushregion.x1))
    {
        ggi_conf.flushregion.x1 = vo_dx + x;
    }
    if ((ggi_conf.flushregion.y1 == -1) ||
        ((vo_dy + y) < ggi_conf.flushregion.y1))
    {
        ggi_conf.flushregion.y1 = vo_dy + y;
    }
    if ((ggi_conf.flushregion.x2 == -1) ||
        ((vo_dx + x + w) > ggi_conf.flushregion.x2))
    {
        ggi_conf.flushregion.x2 = vo_dx + x + w;
    }
    if ((ggi_conf.flushregion.y2 == -1) ||
        ((vo_dy + y + h) > ggi_conf.flushregion.y2))
    {
        ggi_conf.flushregion.y2 = vo_dy + y + h;
    }

    return (1);
}

static int query_format(uint32_t format)
{
    ggi_mode mode;
    uint32_t vfcap;

    vfcap = VFCAP_CSP_SUPPORTED
            | VFCAP_CSP_SUPPORTED_BY_HW
            | VFCAP_ACCEPT_STRIDE;

    if ((!ggi_conf.depthonscreen || !vo_dbpp) && ggi_conf.vis) {
        if (ggiGetMode(ggi_conf.vis, &mode) == 0) {
            ggi_conf.depthonscreen = GT_DEPTH(mode.graphtype);
            vo_dbpp = GT_SIZE(mode.graphtype);
        }
        if (GT_SCHEME(mode.graphtype) == GT_AUTO) {
            ggiCheckMode(ggi_conf.vis, &mode);
        }
        if (GT_SCHEME(mode.graphtype) != GT_TRUECOLOR) {
            mode.graphtype = GT_32BIT;
            ggi_conf.depthonscreen = GT_DEPTH(mode.graphtype);
            vo_dbpp = GT_SIZE(mode.graphtype);
        }
    }
    if ((IMGFMT_IS_BGR(format) && (IMGFMT_BGR_DEPTH(format) == vo_dbpp)) ||
        (IMGFMT_IS_RGB(format) && (IMGFMT_RGB_DEPTH(format) == vo_dbpp)))
    {
        return vfcap;
    }
    if (IMGFMT_IS_BGR(format) || IMGFMT_IS_RGB(format)) {
        set_graphtype(format, &mode);

        if (ggiCheckMode(ggi_conf.drawvis, &mode) < 0) {
            return 0;
        } else {
            return vfcap;
        }
    }
    return (0);
}

static int preinit(const char *arg)
{
    if (ggiInit() != 0) {
        mp_msg(MSGT_VO, MSGL_FATAL, "[ggi] unable to initialize GGI\n");
        return (-1);
    }
#ifdef HAVE_GGIWMH
    if (ggiWmhInit() < 0) {
        mp_msg(MSGT_VO, MSGL_FATAL, "[ggi] unable to initialize libggiwmh\n");
        return (-1);
    }
#endif

    if (arg) {
        int i = 0;
        ggi_conf.driver = strdup(arg);
        while (ggi_conf.driver[i] != '\0') {
            if (ggi_conf.driver[i] == '.')
                ggi_conf.driver[i] = ',';
            i++;
        }
    } else {
        ggi_conf.driver = NULL;
    }

    ggi_conf.vis = ggiOpen(ggi_conf.driver);
    if (ggi_conf.vis == NULL) {
        mp_msg(MSGT_VO, MSGL_FATAL, "[ggi] unable to open '%s' output\n",
               (ggi_conf.driver == NULL) ? "default" : ggi_conf.driver);
        ggiExit();
        return (-1);
    }
    ggi_conf.drawvis = ggi_conf.vis;


#ifdef HAVE_GGIWMH
    ggiWmhAttach(ggi_conf.vis);
#endif


    mp_msg(MSGT_VO, MSGL_V, "[ggi] using '%s' output\n",
          (ggi_conf.driver == NULL) ? "default" : ggi_conf.driver);

    return 0;
}

static void uninit(void)
{
    if (ggi_conf.driver)
        free(ggi_conf.driver);

#ifdef HAVE_GGIWMH
    ggiWmhDetach(ggi_conf.vis);
    ggiWmhExit();
#endif

    if (ggi_conf.drawvis != NULL && ggi_conf.drawvis != ggi_conf.vis)
        ggiClose(ggi_conf.drawvis);

    ggiClose(ggi_conf.vis);
    ggiExit();
}

static int control(uint32_t request, void *data)
{
    switch (request) {
    case VOCTRL_QUERY_FORMAT:
        return query_format(*((uint32_t *) data));
    case VOCTRL_GET_IMAGE:
        return get_image(data);
#ifdef HAVE_GGIWMH
    case VOCTRL_ONTOP:
        vo_ontop = (!(vo_ontop));
        window_ontop();
        return VO_TRUE;
#endif
    }
    return VO_NOTIMPL;
}

/* EVENT handling */
#include "osdep/keycodes.h"

static void check_events(void)
{
    struct timeval  tv = {0, 0};
    ggi_event       event;
    ggi_event_mask  mask;

    if ((mask = ggiEventPoll(ggi_conf.vis, emAll, &tv))) {
        if (ggiEventRead(ggi_conf.vis, &event, emAll) != 0) {
            mp_dbg(MSGT_VO, MSGL_DBG3,
                   "type: %4x, origin: %4x, "
                   "sym: %4x, label: %4x, button=%4x\n",
                   event.any.origin, event.any.type, event.key.sym,
                   event.key.label, event.key.button);

            switch (event.any.type) {
            case evKeyPress:
                switch (event.key.sym) {
                case GIIK_PAsterisk:    /* PStar */
                case GIIUC_Asterisk:
                    mplayer_put_key('*');
                    break;
                case GIIK_PSlash:
                case GIIUC_Slash:
                    mplayer_put_key('/');
                    break;
                case GIIK_PPlus:
                case GIIUC_Plus:
                    mplayer_put_key('+');
                    break;
                case GIIK_PMinus:
                case GIIUC_Minus:
                    mplayer_put_key('-');
                    break;
                case GIIUC_o:
                case GIIUC_O:
                    mplayer_put_key('o');
                    break;
                case GIIUC_g:
                case GIIUC_G:
                    mplayer_put_key('g');
                    break;
                case GIIUC_z:
                case GIIUC_Z:
                    mplayer_put_key('z');
                    break;
                case GIIUC_x:
                case GIIUC_X:
                    mplayer_put_key('x');
                    break;
                case GIIUC_m:
                case GIIUC_M:
                    mplayer_put_key('m');
                    break;
                case GIIUC_d:
                case GIIUC_D:
                    mplayer_put_key('d');
                    break;
                case GIIUC_q:
                case GIIUC_Q:
                    mplayer_put_key('q');
                    break;
                case GIIUC_h:
                case GIIUC_H:
                    mplayer_put_key('h');
                    break;
                case GIIUC_l:
                case GIIUC_L:
                    mplayer_put_key('l');
                    break;
                case GIIUC_Space:
                case GIIUC_p:
                case GIIUC_P:
                    mplayer_put_key('p');
                    break;
                case GIIK_Up:
                    mplayer_put_key(KEY_UP);
                    break;
                case GIIK_Down:
                    mplayer_put_key(KEY_DOWN);
                    break;
                case GIIK_Left:
                    mplayer_put_key(KEY_LEFT);
                    break;
                case GIIK_Right:
                    mplayer_put_key(KEY_RIGHT);
                    break;
                case GIIK_PageUp:
                    mplayer_put_key(KEY_PAGE_UP);
                    break;
                case GIIK_PageDown:
                    mplayer_put_key(KEY_PAGE_DOWN);
                    break;
                default:
                    break;
                }   /* switch */

                break;
            }   /* switch */
        }   /* if */
    }   /* if */
    return;
}