/*
	vulkan_main.c

	Vulkan rendering

	Copyright (C) 2021 Bill Currie <bill@taniwha.org>

	Author: Bill Currie <bill@taniwha.org>
	Date: 2021/1/19

	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

#ifdef HAVE_STRING_H
# include "string.h"
#endif
#ifdef HAVE_STRINGS_H
# include "strings.h"
#endif

#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/image.h"
#include "QF/render.h"
#include "QF/screen.h"
#include "QF/sys.h"

#include "QF/scene/entity.h"
#include "QF/scene/scene.h"

#include "QF/Vulkan/qf_vid.h"
#include "QF/Vulkan/qf_alias.h"
#include "QF/Vulkan/qf_bsp.h"
#include "QF/Vulkan/qf_iqm.h"
#include "QF/Vulkan/qf_lighting.h"
#include "QF/Vulkan/qf_lightmap.h"
#include "QF/Vulkan/qf_main.h"
#include "QF/Vulkan/qf_particles.h"
#include "QF/Vulkan/qf_scene.h"
#include "QF/Vulkan/qf_sprite.h"
//#include "QF/Vulkan/qf_textures.h"
#include "QF/Vulkan/renderpass.h"

#include "mod_internal.h"
#include "r_internal.h"
#include "vid_vulkan.h"

void
Vulkan_RenderEntities (entqueue_t *queue, qfv_renderframe_t *rFrame)
{
	if (!r_drawentities)
		return;
#define RE_LOOP(type_name, Type) \
	do { \
		int         begun = 0; \
		for (size_t i = 0; i < queue->ent_queues[mod_##type_name].size; \
			 i++) { \
			entity_t   *ent = queue->ent_queues[mod_##type_name].a[i]; \
			if (!begun) { \
				Vulkan_##Type##Begin (rFrame); \
				begun = 1; \
			} \
			/* hack the depth range to prevent view model */\
			/* from poking into walls */\
			if (ent == vr_data.view_model) { \
				Vulkan_AliasDepthRange (rFrame, 0, 0.3); \
			} \
			Vulkan_Draw##Type (ent, rFrame); \
			/* unhack in case the view_model is not the last */\
			if (ent == vr_data.view_model) { \
				Vulkan_AliasDepthRange (rFrame, 0, 1); \
			} \
		} \
		if (begun) \
			Vulkan_##Type##End (rFrame); \
	} while (0)

	RE_LOOP (alias, Alias);
	RE_LOOP (iqm, IQM);
	RE_LOOP (sprite, Sprite);
}

static void
Vulkan_DrawViewModel (vulkan_ctx_t *ctx)
{
	entity_t   *ent = vr_data.view_model;
	if (vr_data.inhibit_viewmodel
		|| !r_drawviewmodel
		|| !r_drawentities
		|| !ent->renderer.model)
		return;

	EntQueue_AddEntity (r_ent_queue, ent, ent->renderer.model->type);
}

void
Vulkan_RenderView (qfv_renderframe_t *rFrame)
{
	vulkan_ctx_t *ctx = rFrame->vulkan_ctx;

	if (!r_refdef.worldmodel) {
		return;
	}

	Vulkan_DrawWorld (rFrame);
	Vulkan_DrawSky (rFrame);
	if (vr_data.view_model) {
		Vulkan_DrawViewModel (ctx);
	}
	Vulkan_DrawWaterSurfaces (rFrame);
	Vulkan_Bsp_Flush (ctx);
	Vulkan_Scene_Flush (ctx);
}

void
Vulkan_NewScene (scene_t *scene, vulkan_ctx_t *ctx)
{
	int         i;

	for (i = 0; i < 256; i++) {
		d_lightstylevalue[i] = 264;		// normal light value
	}

	r_refdef.worldmodel = scene->worldmodel;

	// Force a vis update
	R_MarkLeaves (0, 0, 0, 0);

	R_ClearParticles ();
	Vulkan_RegisterTextures (scene->models, scene->num_models, ctx);
	//Vulkan_BuildLightmaps (scene->models, scene->num_models, ctx);
	Vulkan_BuildDisplayLists (scene->models, scene->num_models, ctx);
	Vulkan_LoadLights (scene, ctx);
}