ibl_coordinator.h

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#ifndef IBL_COORDINATOR_H
#define IBL_COORDINATOR_H
 
#include "gl_common.h"
#include "pbr.h"
#include "perf_timer.h"
 
typedef enum {
    IBL_STATE_IDLE = 0,  
    IBL_STATE_LUMINANCE, 
    IBL_STATE_LUMINANCE_WAIT, 
    IBL_STATE_SPECULAR_INIT,  
    IBL_STATE_SPECULAR_MIPS,  
    IBL_STATE_IRRADIANCE,     
    IBL_STATE_DONE 
} IBLState;
 
typedef struct {
    /* --- State Machine --- */
    IBLState state;    
    GLsync lum_sync;   
    int current_mip;   
    int total_mips;    
    int width;         
    int height;        
    float threshold;   
    int current_slice; 
    int total_slices;  
    /* --- Resources (Owned/Managed during process) --- */
    GLuint pending_hdr_tex;  
    GLuint pending_spec_tex; 
    GLuint pending_irr_tex;  
    /* --- Dependencies (Injected) --- */
    GLuint shader_spmap;     
    GLuint shader_irmap;     
    GLuint shader_lum_pass1; 
    GLuint shader_lum_pass2; 
    GLuint lum_ssbo[2];      
    PBRSpecUniforms
        spec_uniforms; 
    PBRIrrUniforms
        irr_uniforms; 
    PBRLumUniforms
        lum_uniforms; 
    /* --- Performance Metrics --- */
    PerfTimer global_timer; 
    PerfTimer stage_timer;  
    double stage_gpu_min;   
    double stage_gpu_max;   
    double stage_gpu_sum;   
    int stage_slice_count;  
} IBLCoordinator;
 
void ibl_coordinator_init(IBLCoordinator* coord, GLuint shader_spmap,
                          GLuint shader_irmap, GLuint shader_lum_pass1,
                          GLuint shader_lum_pass2);
 
void ibl_coordinator_cleanup(IBLCoordinator* coord);
 
void ibl_coordinator_start(IBLCoordinator* coord, GLuint hdr_tex, int width,
                           int height);
 
IBLState ibl_coordinator_update(IBLCoordinator* coord, uint64_t frame_count);
 
int ibl_coordinator_get_results(IBLCoordinator* coord, GLuint* out_hdr_tex,
                                GLuint* out_spec_tex, GLuint* out_irr_tex,
                                float* out_threshold);
 
void ibl_coordinator_reset(IBLCoordinator* coord);
 
#endif /* IBL_COORDINATOR_H */