/*
	vid_render_sw.c

	SW version of the renderer

	Copyright (C) 2012 Bill Currie <bill@taniwha.org>

	This program 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.

	This program 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 this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "QF/cvar.h"

#include "QF/plugin/general.h"
#include "QF/plugin/vid_render.h"

#include "QF/ui/view.h"

#include "mod_internal.h"
#include "r_internal.h"
#include "vid_internal.h"
#include "vid_sw.h"

sw_ctx_t *sw_ctx;

static void
sw_vid_render_choose_visual (void *data)
{
    sw_ctx->choose_visual (sw_ctx);
}

static void
sw_vid_render_create_context (void *data)
{
    sw_ctx->create_context (sw_ctx);
}

static void
sw_vid_render_set_palette (void *data, const byte *palette)
{
    sw_ctx->set_palette (sw_ctx, palette);
}

static vid_model_funcs_t model_funcs = {
	0,
	sw_Mod_LoadLighting,
	0,//Mod_SubdivideSurface,
	0,//Mod_ProcessTexture,

	Mod_LoadIQM,
	Mod_LoadAliasModel,
	Mod_LoadSpriteModel,

	sw_Mod_MakeAliasModelDisplayLists,
	sw_Mod_LoadSkin,
	0,
	0,
	sw_Mod_IQMFinish,
	1,
	sw_Mod_SpriteLoadFrames,

	Skin_SetColormap,
	Skin_SetSkin,
	sw_Skin_SetupSkin,
	Skin_SetTranslation,
	sw_Skin_ProcessTranslation,
	sw_Skin_InitTranslations,
};

static void
sw_vid_render_init (void)
{
	if (!vr_data.vid->vid_internal->sw_context) {
		Sys_Error ("Sorry, software rendering not supported by this program.");
	}
	sw_ctx = vr_data.vid->vid_internal->sw_context ();

	vr_data.vid->vid_internal->data = sw_ctx;
	vr_data.vid->vid_internal->set_palette = sw_vid_render_set_palette;
	vr_data.vid->vid_internal->choose_visual = sw_vid_render_choose_visual;
	vr_data.vid->vid_internal->create_context = sw_vid_render_create_context;

	vr_funcs = &sw_vid_render_funcs;
	m_funcs = &model_funcs;
}

static void
sw_vid_render_shutdown (void)
{
}

static void
sw_begin_frame (void)
{
	if (r_numsurfs->int_val) {
		int         surfcount = surface_p - surfaces;
		int         max_surfs = surf_max - surfaces;
		if (surfcount > r_maxsurfsseen)
			r_maxsurfsseen = surfcount;

		Sys_Printf ("Used %d of %d surfs; %d max\n",
					surfcount, max_surfs, r_maxsurfsseen);
	}

	if (r_numedges->int_val) {
		int         edgecount = edge_p - r_edges;

		if (edgecount > r_maxedgesseen)
			r_maxedgesseen = edgecount;

		Sys_Printf ("Used %d of %d edges; %d max\n", edgecount,
					r_numallocatededges, r_maxedgesseen);
	}

	// do 3D refresh drawing, and then update the screen
	if (vr_data.scr_fullupdate++ < vid.numpages) {
		vr_data.scr_copyeverything = 1;
		Draw_TileClear (0, 0, vid.width, vid.height);
	}
}

static void
sw_render_view (void)
{
	R_RenderView ();
}

static void
sw_draw_transparent (void)
{
}

static void
sw_set_2d (int scaled)
{
}

static void
sw_end_frame (void)
{
	if (r_reportsurfout->int_val && r_outofsurfaces)
		Sys_Printf ("Short %d surfaces\n", r_outofsurfaces);

	if (r_reportedgeout->int_val && r_outofedges)
		Sys_Printf ("Short roughly %d edges\n", r_outofedges * 2 / 3);

	// update one of three areas
	vrect_t     vrect;
	if (vr_data.scr_copyeverything) {
		vrect.x = 0;
		vrect.y = 0;
		vrect.width = vid.width;
		vrect.height = vid.height;
		vrect.next = 0;
	} else if (scr_copytop) {
		vrect.x = 0;
		vrect.y = 0;
		vrect.width = vid.width;
		vrect.height = vid.height - vr_data.lineadj;
		vrect.next = 0;
	} else {
		vrect.x = vr_data.scr_view->xpos;
		vrect.y = vr_data.scr_view->ypos;
		vrect.width = vr_data.scr_view->xlen;
		vrect.height = vr_data.scr_view->ylen;
		vrect.next = 0;
	}
	sw_ctx->update (sw_ctx, &vrect);
}

vid_render_funcs_t sw_vid_render_funcs = {
	sw_vid_render_init,
	Draw_Character,
	Draw_String,
	Draw_nString,
	Draw_AltString,
	Draw_ConsoleBackground,
	Draw_Crosshair,
	Draw_CrosshairAt,
	Draw_TileClear,
	Draw_Fill,
	Draw_TextBox,
	Draw_FadeScreen,
	Draw_BlendScreen,
	Draw_CachePic,
	Draw_UncachePic,
	Draw_MakePic,
	Draw_DestroyPic,
	Draw_PicFromWad,
	Draw_Pic,
	Draw_Picf,
	Draw_SubPic,

	sw_SCR_CaptureBGR,

	sw_ParticleSystem,
	sw_R_Init,
	R_ClearState,
	R_LoadSkys,
	R_NewMap,
	R_LineGraph,
	R_ViewChanged,
	sw_begin_frame,
	sw_render_view,
	R_DrawEntitiesOnList,
	R_DrawParticles,
	sw_draw_transparent,
	sw_set_2d,
	sw_end_frame,
	&model_funcs
};

static general_funcs_t plugin_info_general_funcs = {
	.shutdown = sw_vid_render_shutdown,
};

static general_data_t plugin_info_general_data;

static plugin_funcs_t plugin_info_funcs = {
	.general = &plugin_info_general_funcs,
	.vid_render = &sw_vid_render_funcs,
};

static plugin_data_t plugin_info_data = {
	.general = &plugin_info_general_data,
	.vid_render = &vid_render_data,
};

static plugin_t plugin_info = {
	qfp_vid_render,
	0,
	QFPLUGIN_VERSION,
	"0.1",
	"SW Renderer",
	"Copyright (C) 1996-1997  Id Software, Inc.\n"
	"Copyright (C) 1999-2012  contributors of the QuakeForge project\n"
	"Please see the file \"AUTHORS\" for a list of contributors",
	&plugin_info_funcs,
	&plugin_info_data,
};

PLUGIN_INFO(vid_render, sw)
{
	return &plugin_info;
}
