renderQueue.hpp

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#pragma once
 
#define GLM_FORCE_RADIANS
 
#include <algorithm>
#include <array>
#include <cstdlib>
#include <glm/glm.hpp>
#include <mutex>
#include <queue>
#include <variant>
#include <vector>
 
enum RenderCommandType { AddRect, AddTriangle, RemoveFig, SetTransform, SetCamera, SetTexture };
 
struct TextureDescriptor {
  uint32_t arrayId;
  uint32_t layerId;
};
 
struct RenderCommand {
  RenderCommandType type;
 
  struct AddRect {
    glm::vec2 position;
    float width;
    float height;
    glm::vec3 color;
    uint32_t index;
  };
 
  struct AddTri {
    std::array<glm::vec2, 3> positions;
    glm::vec3 color;
    uint32_t index;
  };
 
  struct Remove {
    uint32_t index;
  };
 
  struct Transform {
    uint32_t index;
    glm::mat4 model;
  };
 
  struct Camera {
    glm::vec2 position;
    float zoom;
  };
 
  struct SetTexture {
    uint32_t index;
    TextureDescriptor textureDesc;
    std::vector<glm::vec2> texCoords;
  };
 
  using Data = std::variant<AddRect, AddTri, Remove, Transform, Camera, SetTexture>;
 
  Data data;
};
 
class RenderQueue {
public:
  void push(RenderCommand command);
 
  bool pop(RenderCommand& command);
 
private:
  std::mutex mutex;
  std::queue<RenderCommand> queue;
};