#ifndef __QF_Vulkan_qf_particles_h
#define __QF_Vulkan_qf_particles_h

#include "QF/darray.h"
#include "QF/image.h"
#include "QF/render.h"

#include "QF/Vulkan/command.h"

typedef struct qfv_particle_s {
	vec4f_t     pos;
	vec4f_t     vel;
	vec4f_t     color;
	float       texture;
	float       ramp;
	float       scale;
	float       live;
} qfv_particle_t;

typedef struct qfv_parameters_s {
	vec4f_t     drag;
	vec4f_t     ramp;
} qfv_parameters_t;

// Doubles as VkDrawIndirectCommand
typedef struct qfv_particle_system_s {
	uint32_t    vertexCount;	// always 1
	uint32_t    particleCount;
	uint32_t    firstVertex;	// always 0
	uint32_t    firstInstance;	// always 0
} qfv_particle_system_t;

typedef enum {
	QFV_particleTranslucent,

	QFV_particleNumPasses
} QFV_ParticleSubpass;

typedef struct particleframe_s {
	VkCommandBuffer compute;
	VkEvent     physicsEvent;
	VkEvent     updateEvent;
	VkBuffer    states;
	VkBuffer    params;
	VkBuffer    system;

	VkDescriptorSet curDescriptors;
	VkDescriptorSet inDescriptors;
	VkDescriptorSet newDescriptors;

	qfv_cmdbufferset_t cmdSet;
} particleframe_t;

typedef struct particleframeset_s
	DARRAY_TYPE (particleframe_t) particleframeset_t;

typedef struct particlectx_s {
	particleframeset_t frames;
	VkPipeline  physics;
	VkPipeline  update;
	VkPipeline  draw;

	struct qfv_resource_s *resources;
	struct qfv_stagebuf_s *stage;

	VkDescriptorPool pool;
	VkDescriptorSetLayout setLayout;
	VkPipelineLayout physics_layout;
	VkPipelineLayout update_layout;
	VkPipelineLayout draw_layout;

	psystem_t  *psystem;
} particlectx_t;

struct cvar_s;
struct vulkan_ctx_s;
struct qfv_renderframe_s;

struct psystem_s *Vulkan_ParticleSystem (struct vulkan_ctx_s *ctx);
void Vulkan_Particles_Init (struct vulkan_ctx_s *ctx);
void Vulkan_Particles_Shutdown (struct vulkan_ctx_s *ctx);
void Vulkan_DrawParticles (struct qfv_renderframe_s *rFrame);
void Vulkan_Particles_CreateRenderPasses (struct vulkan_ctx_s *ctx);

#endif//__QF_Vulkan_qf_particles_h