/*
 * 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) 2005 Blender Foundation.
 * All rights reserved.
 */

/** \file
 * \ingroup gpu
 */

#pragma once

#include <stdbool.h>

#include "DNA_scene_types.h"
#include "DNA_vec_types.h"

#include "GPU_framebuffer.h"
#include "GPU_texture.h"

#ifdef __cplusplus
extern "C" {
#endif

#define GPU_INFO_SIZE 512 /* IMA_MAX_RENDER_TEXT */
#define GLA_PIXEL_OFS 0.375f

typedef struct GPUViewport GPUViewport;

struct GPUFrameBuffer;

/* Contains memory pools information */
typedef struct ViewportMemoryPool {
  struct BLI_memblock *commands;
  struct BLI_memblock *commands_small;
  struct BLI_memblock *callbuffers;
  struct BLI_memblock *obmats;
  struct BLI_memblock *obinfos;
  struct BLI_memblock *cullstates;
  struct BLI_memblock *shgroups;
  struct BLI_memblock *uniforms;
  struct BLI_memblock *views;
  struct BLI_memblock *passes;
  struct BLI_memblock *images;
  struct GPUUniformBuffer **matrices_ubo;
  struct GPUUniformBuffer **obinfos_ubo;
  uint ubo_len;
} ViewportMemoryPool;

/* All FramebufferLists are just the same pointers with different names */
typedef struct FramebufferList {
  struct GPUFrameBuffer *framebuffers[0];
} FramebufferList;

typedef struct TextureList {
  struct GPUTexture *textures[0];
} TextureList;

typedef struct PassList {
  struct DRWPass *passes[0];
} PassList;

typedef struct StorageList {
  void *storage[0]; /* custom structs from the engine */
} StorageList;

typedef struct ViewportEngineData {
  void *engine_type;

  FramebufferList *fbl;
  TextureList *txl;
  PassList *psl;
  StorageList *stl;
  char info[GPU_INFO_SIZE];

  TextureList *txl_stereo;
  StorageList *stl_stereo;
  /* we may want to put this elsewhere */
  struct DRWTextStore *text_draw_cache;

  /* Profiling data */
  double init_time;
  double render_time;
  double background_time;
} ViewportEngineData;

typedef struct ViewportEngineData_Info {
  int fbl_len;
  int txl_len;
  int psl_len;
  int stl_len;
} ViewportEngineData_Info;

GPUViewport *GPU_viewport_create(void);
GPUViewport *GPU_viewport_stereo_create(void);
void GPU_viewport_bind(GPUViewport *viewport, int view, const rcti *rect);
void GPU_viewport_unbind(GPUViewport *viewport);
void GPU_viewport_draw_to_screen(GPUViewport *viewport, int view, const rcti *rect);
void GPU_viewport_draw_to_screen_ex(GPUViewport *viewport,
                                    int view,
                                    const rcti *rect,
                                    bool display_colorspace);
void GPU_viewport_free(GPUViewport *viewport);

void GPU_viewport_colorspace_set(GPUViewport *viewport,
                                 ColorManagedViewSettings *view_settings,
                                 ColorManagedDisplaySettings *display_settings,
                                 float dither);

void GPU_viewport_bind_from_offscreen(GPUViewport *viewport, struct GPUOffScreen *ofs);
void GPU_viewport_unbind_from_offscreen(GPUViewport *viewport,
                                        struct GPUOffScreen *ofs,
                                        bool display_colorspace);

ViewportMemoryPool *GPU_viewport_mempool_get(GPUViewport *viewport);
struct DRWInstanceDataList *GPU_viewport_instance_data_list_get(GPUViewport *viewport);

void *GPU_viewport_engine_data_create(GPUViewport *viewport, void *engine_type);
void *GPU_viewport_engine_data_get(GPUViewport *viewport, void *engine_type);
void *GPU_viewport_framebuffer_list_get(GPUViewport *viewport);
void GPU_viewport_stereo_composite(GPUViewport *viewport, Stereo3dFormat *stereo_format);
void *GPU_viewport_texture_list_get(GPUViewport *viewport);
void GPU_viewport_size_get(const GPUViewport *viewport, int size[2]);
void GPU_viewport_size_set(GPUViewport *viewport, const int size[2]);
void GPU_viewport_active_view_set(GPUViewport *viewport, int view);

/* Profiling */
double *GPU_viewport_cache_time_get(GPUViewport *viewport);

void GPU_viewport_tag_update(GPUViewport *viewport);
bool GPU_viewport_do_update(GPUViewport *viewport);

GPUTexture *GPU_viewport_color_texture(GPUViewport *viewport, int view);

/* Texture pool */
GPUTexture *GPU_viewport_texture_pool_query(
    GPUViewport *viewport, void *engine, int width, int height, int format);

bool GPU_viewport_engines_data_validate(GPUViewport *viewport, void **engine_handle_array);
void GPU_viewport_cache_release(GPUViewport *viewport);

struct GPUFrameBuffer *GPU_viewport_framebuffer_default_get(GPUViewport *viewport);
struct GPUFrameBuffer *GPU_viewport_framebuffer_overlay_get(GPUViewport *viewport);

#ifdef __cplusplus
}
#endif