/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file RE_engine.h
 *  \ingroup render
 */

#ifndef __RE_ENGINE_H__
#define __RE_ENGINE_H__

#include "DNA_listBase.h"
#include "DNA_scene_types.h"
#include "RNA_types.h"
#include "RE_bake.h"

struct bNode;
struct bNodeTree;
struct Object;
struct Render;
struct RenderData;
struct RenderEngine;
struct RenderEngineType;
struct RenderLayer;
struct RenderResult;
struct ReportList;
struct Scene;
struct BakePixel;

/* External Engine */

/* RenderEngineType.flag */
#define RE_INTERNAL				1
#define RE_GAME					2
#define RE_USE_PREVIEW			4
#define RE_USE_POSTPROCESS		8
#define RE_USE_SHADING_NODES	16
#define RE_USE_EXCLUDE_LAYERS	32
#define RE_USE_SAVE_BUFFERS		64
#define RE_USE_TEXTURE_PREVIEW		128
#define RE_USE_SHADING_NODES_CUSTOM 	256
#define RE_USE_SPHERICAL_STEREO 512

/* RenderEngine.flag */
#define RE_ENGINE_ANIMATION		1
#define RE_ENGINE_PREVIEW		2
#define RE_ENGINE_DO_DRAW		4
#define RE_ENGINE_DO_UPDATE		8
#define RE_ENGINE_RENDERING		16
#define RE_ENGINE_HIGHLIGHT_TILES	32
#define RE_ENGINE_USED_FOR_VIEWPORT	64

/* RenderEngine.update_flag, used by internal now */
#define RE_ENGINE_UPDATE_MA			1
#define RE_ENGINE_UPDATE_OTHER		2
#define RE_ENGINE_UPDATE_DATABASE	4

extern ListBase R_engines;

typedef struct RenderEngineType {
	struct RenderEngineType *next, *prev;

	/* type info */
	char idname[64]; // best keep the same size as BKE_ST_MAXNAME
	char name[64];
	int flag;

	void (*update)(struct RenderEngine *engine, struct Main *bmain, struct Scene *scene);
	void (*render)(struct RenderEngine *engine, struct Scene *scene);
	void (*bake)(struct RenderEngine *engine, struct Scene *scene, struct Object *object, const int pass_type, const int pass_filter, const int object_id, const struct BakePixel *pixel_array, const int num_pixels, const int depth, void *result);

	void (*view_update)(struct RenderEngine *engine, const struct bContext *context);
	void (*view_draw)(struct RenderEngine *engine, const struct bContext *context);

	void (*update_script_node)(struct RenderEngine *engine, struct bNodeTree *ntree, struct bNode *node);
	void (*update_render_passes)(struct RenderEngine *engine, struct Scene *scene, struct SceneRenderLayer *srl);

	/* RNA integration */
	ExtensionRNA ext;
} RenderEngineType;

typedef struct RenderEngine {
	RenderEngineType *type;
	void *py_instance;

	int flag;
	struct Object *camera_override;
	unsigned int layer_override;

	int tile_x;
	int tile_y;

	struct Render *re;
	ListBase fullresult;
	char text[512]; /* IMA_MAX_RENDER_TEXT */

	int resolution_x, resolution_y;

	struct ReportList *reports;

	/* for blender internal only */
	int update_flag;
	int job_update_flag;

	rctf last_viewplane;
	rcti last_disprect;
	float last_viewmat[4][4];
	int last_winx, last_winy;
} RenderEngine;

RenderEngine *RE_engine_create(RenderEngineType *type);
RenderEngine *RE_engine_create_ex(RenderEngineType *type, bool use_for_viewport);
void RE_engine_free(RenderEngine *engine);

void RE_layer_load_from_file(struct RenderLayer *layer, struct ReportList *reports, const char *filename, int x, int y);
void RE_result_load_from_file(struct RenderResult *result, struct ReportList *reports, const char *filename);

struct RenderResult *RE_engine_begin_result(RenderEngine *engine, int x, int y, int w, int h, const char *layername, const char *viewname);
void RE_engine_update_result(RenderEngine *engine, struct RenderResult *result);
void RE_engine_add_pass(RenderEngine *engine, const char *name, int channels, const char *chan_id, const char *layername);
void RE_engine_end_result(RenderEngine *engine, struct RenderResult *result, int cancel, int highlight, int merge_results);

const char *RE_engine_active_view_get(RenderEngine *engine);
void RE_engine_active_view_set(RenderEngine *engine, const char *viewname);
float RE_engine_get_camera_shift_x(RenderEngine *engine, struct Object *camera, int use_spherical_stereo);
void RE_engine_get_camera_model_matrix(RenderEngine *engine, struct Object *camera, int use_spherical_stereo, float *r_modelmat);
int RE_engine_get_spherical_stereo(RenderEngine *engine, struct Object *camera);

int RE_engine_test_break(RenderEngine *engine);
void RE_engine_update_stats(RenderEngine *engine, const char *stats, const char *info);
void RE_engine_update_progress(RenderEngine *engine, float progress);
void RE_engine_update_memory_stats(RenderEngine *engine, float mem_used, float mem_peak);
void RE_engine_report(RenderEngine *engine, int type, const char *msg);
void RE_engine_set_error_message(RenderEngine *engine, const char *msg);

int RE_engine_render(struct Render *re, int do_all);

bool RE_engine_is_external(struct Render *re);

void RE_engine_frame_set(struct RenderEngine *engine, int frame, float subframe);

void RE_engine_register_pass(struct RenderEngine *engine, struct Scene *scene, struct SceneRenderLayer *srl,
                             const char *name, int channels, const char *chanid, int type);

/* Engine Types */

void RE_engines_init(void);
void RE_engines_exit(void);

RenderEngineType *RE_engines_find(const char *idname);

rcti* RE_engine_get_current_tiles(struct Render *re, int *r_total_tiles, bool *r_needs_free);
struct RenderData *RE_engine_get_render_data(struct Render *re);
void RE_bake_engine_set_engine_parameters(struct Render *re, struct Main *bmain, struct Scene *scene);

#endif /* __RE_ENGINE_H__ */

