shaderpreset.h

/*
 *  Copyright (C) 2022 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#ifndef C_API_ADDONINSTANCE_SHADER_PRESET_H
#define C_API_ADDONINSTANCE_SHADER_PRESET_H

#include "../addon_base.h"

#include <stddef.h> /* size_t */

//==============================================================================
#define DEFAULT_PORT_ID "1"
//------------------------------------------------------------------------------

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
  //============================================================================
  typedef void* preset_file;

  typedef enum SHADER_SCALE_TYPE
  {
    SHADER_SCALE_TYPE_INPUT,

    SHADER_SCALE_TYPE_ABSOLUTE,

    SHADER_SCALE_TYPE_VIEWPORT
  } SHADER_SCALE_TYPE;

  typedef enum SHADER_FILTER_TYPE
  {
    SHADER_FILTER_TYPE_UNSPEC,
    SHADER_FILTER_TYPE_LINEAR,
    SHADER_FILTER_TYPE_NEAREST
  } SHADER_FILTER_TYPE;

  typedef enum SHADER_WRAP_TYPE
  {
    SHADER_WRAP_TYPE_BORDER, /* Deprecated, will be translated to EDGE in GLES */
    SHADER_WRAP_TYPE_EDGE,
    SHADER_WRAP_TYPE_REPEAT,
    SHADER_WRAP_TYPE_MIRRORED_REPEAT
  } SHADER_WRAP_TYPE;

  typedef struct fbo_scale_axis
  {
    SHADER_SCALE_TYPE type;
    union
    {
      float scale;
      unsigned abs;
    };
  } fbo_scale_axis;

  typedef struct fbo_scale
  {
    bool srgb_fbo;

    bool fp_fbo;

    fbo_scale_axis scale_x;

    fbo_scale_axis scale_y;
  } fbo_scale;

  typedef struct video_shader_parameter
  {
    char* id;
    char* desc;
    float current;
    float minimum;
    float initial;
    float maximum;
    float step;
  } video_shader_parameter;

  typedef struct video_shader_pass
  {
    char* source_path;

    char* vertex_source;

    char* fragment_source;

    fbo_scale fbo;

    SHADER_FILTER_TYPE filter;

    SHADER_WRAP_TYPE wrap;

    unsigned frame_count_mod;

    bool mipmap;
  } video_shader_pass;

  typedef struct video_shader_lut
  {
    char* id;

    char* path;

    SHADER_FILTER_TYPE filter;

    SHADER_WRAP_TYPE wrap;

    bool mipmap;
  } video_shader_lut;

  typedef struct video_shader
  {
    unsigned pass_count;
    video_shader_pass* passes;

    unsigned lut_count;
    video_shader_lut* luts;

    unsigned parameter_count;
    video_shader_parameter* parameters;
  } video_shader;
  //----------------------------------------------------------------------------


  //--==----==----==----==----==----==----==----==----==----==----==----==----==--

  typedef struct AddonProps_ShaderPreset
  {
    const char* user_path;

    const char* addon_path;
  } AddonProps_ShaderPreset;

  struct AddonInstance_ShaderPreset;

  typedef struct AddonToKodiFuncTable_ShaderPreset
  {
    KODI_HANDLE kodiInstance;
  } AddonToKodiFuncTable_ShaderPreset;

  typedef struct KodiToAddonFuncTable_ShaderPreset
  {
    KODI_HANDLE addonInstance;

    // TODO: Convert function pointers to CamelCase
    preset_file(__cdecl* preset_file_new)(const AddonInstance_ShaderPreset*, const char*);
    void(__cdecl* preset_file_free)(const AddonInstance_ShaderPreset*, preset_file);

    bool(__cdecl* video_shader_read)(const AddonInstance_ShaderPreset*, preset_file, video_shader*);
    void(__cdecl* video_shader_write)(const AddonInstance_ShaderPreset*,
                                      preset_file,
                                      const video_shader*);
    /*
    void(__cdecl* video_shader_resolve_relative)(const AddonInstance_ShaderPreset*,
                                                 video_shader*,
                                                 const char*);
    bool(__cdecl* video_shader_resolve_current_parameters)(const AddonInstance_ShaderPreset*,
                                                           preset_file,
                                                           video_shader*);
    */
    bool(__cdecl* video_shader_resolve_parameters)(const AddonInstance_ShaderPreset*,
                                                   preset_file,
                                                   video_shader*);
    void(__cdecl* video_shader_free)(const AddonInstance_ShaderPreset*, video_shader*);
  } KodiToAddonFuncTable_ShaderPreset;

  typedef struct AddonInstance_ShaderPreset
  {
    struct AddonProps_ShaderPreset* props;
    struct AddonToKodiFuncTable_ShaderPreset* toKodi;
    struct KodiToAddonFuncTable_ShaderPreset* toAddon;
  } AddonInstance_ShaderPreset;

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* !C_API_ADDONINSTANCE_SHADER_PRESET_H */