geometry_port.hpp

#pragma once
#include <ossia/detail/config.hpp>
 
#include <ossia/detail/small_vector.hpp>
#include <ossia/detail/variant.hpp>
 
#include <memory>
#include <string>
 
namespace ossia
{
struct geometry
{
  struct cpu_buffer
  {
    std::shared_ptr<void> data;
    int64_t size{};
  };
 
  struct gpu_buffer
  {
    void* handle{}; // Can be casted to e.g. a QRhiBuffer
  };
  struct buffer
  {
    ossia::variant<cpu_buffer, gpu_buffer> data;
    bool dirty{};
  };
 
  struct binding
  {
    uint32_t stride{};
    enum
    {
      per_vertex,
      per_instance
    } classification{};
    int step_rate{};
  };
 
  struct attribute
  {
    int binding = 0;
    int location = 0;
 
    enum
    {
      fp4,
      fp3,
      fp2,
      fp1,
      unsigned4,
      unsigned2,
      unsigned1
    } format
        = fp4;
 
    uint32_t offset = 0;
  };
 
  struct input
  {
    int buffer{};
    int64_t offset{};
  };
 
  ossia::small_vector<buffer, 2> buffers;
  ossia::small_vector<binding, 2> bindings;
  ossia::small_vector<attribute, 2> attributes;
  ossia::small_vector<input, 2> input;
 
  int vertices{}, indices{};
  enum
  {
    triangles,
    triangle_strip,
    triangle_fan,
    lines,
    line_strip,
    points
  } topology;
  enum
  {
    none,
    front,
    back
  } cull_mode;
  enum
  {
    counter_clockwise,
    clockwise
  } front_face;
 
  struct
  {
    int buffer{-1};
    int64_t offset{};
    enum
    {
      uint16,
      uint32
    } format{};
  } index;
};
 
struct mesh_list
{
  std::vector<geometry> meshes;
  int64_t dirty_index{};
};
using mesh_list_ptr = std::shared_ptr<mesh_list>;
struct transform3d
{
  float matrix[16]{
      1., 0., 0., 0., 0., 1., 0., 0., 0., 0., 1., 0., 0., 0., 0., 1.,
  };
};
 
struct geometry_filter
{
  int64_t node_id{}; // which node is responsible for initalizing the UBO
  int64_t filter_id{}; // unique index for this filter instance
  std::string shader;
  int64_t dirty_index{};
};
 
struct geometry_filter_list
{
  std::vector<geometry_filter> filters;
  int64_t dirty_index{};
};
using geometry_filter_list_ptr = std::shared_ptr<geometry_filter_list>;
 
struct geometry_spec
{
  mesh_list_ptr meshes;
  geometry_filter_list_ptr filters;
 
  operator bool() const noexcept { return meshes && filters; }
  bool operator==(const geometry_spec&) const noexcept = default;
  bool operator<(const geometry_spec& rhs) const noexcept
  {
    return (meshes < rhs.meshes) || (meshes == rhs.meshes && filters < rhs.filters);
  }
};
 
struct OSSIA_EXPORT geometry_port
{
  static const constexpr int which = 4;
  enum dirt_flags
  {
    dirty_transform = 0x1,
    dirty_meshes = 0x2
  };
 
  void clear();
 
  geometry_spec geometry;
  transform3d transform;
  uint8_t flags{};
};
 
struct geometry_delay_line
{
  std::vector<geometry_spec> geometries;
};
 
}