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#include "evas_common_private.h"
#include "evas_private.h"
#include "evas_engine.h"
#include "Evas_Engine_Software_DDraw.h"

int _evas_engine_soft_ddraw_log_dom = -1;
/* function tables - filled in later (func and parent func) */
static Evas_Func func, pfunc;

/* engine struct data */
typedef struct _Render_Engine Render_Engine;

struct _Render_Engine
{
   Render_Engine_Software_Generic generic;
};

/* log domain variable */
int _evas_log_dom_module = -1;

static void *
_output_setup(int  width,
              int  height,
              int  rot,
              HWND window,
              int  depth,
              int  fullscreen)
{
   Render_Engine *re;
   Outbuf *ob;

   re = calloc(1, sizeof(Render_Engine));
   if (!re)
     return NULL;

   evas_software_ddraw_outbuf_init();

   ob = evas_software_ddraw_outbuf_setup(width, height, rot,
                                         OUTBUF_DEPTH_INHERIT,
                                         window, depth, fullscreen);
   if (!ob) goto on_error;

   if (!evas_render_engine_software_generic_init(&re->generic, ob, NULL,
                                                 evas_software_ddraw_outbuf_rot_get,
                                                 evas_software_ddraw_outbuf_reconfigure,
                                                 NULL,
                                                 NULL,
                                                 evas_software_ddraw_outbuf_new_region_for_update,
                                                 evas_software_ddraw_outbuf_push_updated_region,
                                                 evas_software_ddraw_outbuf_free_region_for_update,
                                                 evas_software_ddraw_outbuf_idle_flush,
                                                 evas_software_ddraw_outbuf_flush,
                                                 NULL,
                                                 evas_software_ddraw_outbuf_free,
                                                 width, height))
     goto on_error;

   return re;

 on_error:
   if (ob) evas_software_ddraw_outbuf_free(ob);
   free(re);
   return NULL;
}


/* engine api this module provides */

static void *
eng_info(void)
{
   Evas_Engine_Info_Software_DDraw *info;

   info = calloc(1, sizeof(Evas_Engine_Info_Software_DDraw));
   if (!info) return NULL;
   info->magic.magic = rand();
   info->render_mode = EVAS_RENDER_MODE_BLOCKING;
   return info;
}

static void
eng_info_free(void *info)
{
   Evas_Engine_Info_Software_DDraw *in;

   in = (Evas_Engine_Info_Software_DDraw *)info;
   free(in);
}

static void *
eng_setup(void *engine EINA_UNUSED, void *in, unsigned int w, unsigned int h)
{
   Evas_Engine_Info_Software_DDraw *info = in;

   return _output_setup(w, h,
                        info->info.rotation,
                        info->info.window,
                        info->info.depth,
                        info->info.fullscreen);
}

static void
eng_output_free(void *engine EINA_UNUSED, void *data)
{
   Render_Engine *re;

   if (!data) return;

   re = (Render_Engine *)data;
   evas_render_engine_software_generic_clean(&re->generic);
   free(re);
}

static Eina_Bool
eng_canvas_alpha_get(void *engine EINA_UNUSED)
{
#warning "We need to handle window with alpha channel."
   return EINA_FALSE;
}

/* module advertising code */
static int
module_open(Evas_Module *em)
{
   if (!em) return 0;
   /* get whatever engine module we inherit from */
   if (!_evas_module_engine_inherit(&pfunc, "software_generic")) return 0;
   _evas_log_dom_module = eina_log_domain_register
     ("evas-software_ddraw", EVAS_DEFAULT_LOG_COLOR);
   if (_evas_log_dom_module < 0)
     {
        EINA_LOG_ERR("Can not create a module log domain.");
        return 0;
     }
   /* store it for later use */
   func = pfunc;
   /* now to override methods */
#define ORD(f) EVAS_API_OVERRIDE(f, &func, eng_)
   ORD(info);
   ORD(info_free);
   ORD(setup);
   ORD(canvas_alpha_get);
   ORD(output_free);
   /* now advertise out own api */
   em->functions = (void *)(&func);
   return 1;
}

static void
module_close(Evas_Module *em EINA_UNUSED)
{
   if (_evas_log_dom_module >= 0)
     {
        eina_log_domain_unregister(_evas_log_dom_module);
        _evas_log_dom_module = -1;
     }
}

static Evas_Module_Api evas_modapi =
{
   EVAS_MODULE_API_VERSION,
   "software_ddraw",
   "none",
   {
     module_open,
     module_close
   }
};

EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_ENGINE, engine, software_ddraw);

#ifndef EVAS_STATIC_BUILD_SOFTWARE_DDRAW
EVAS_EINA_MODULE_DEFINE(engine, software_ddraw);
#endif