scene_gpu_resources.h

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#ifndef SCENE_GPU_RESOURCES_H
#define SCENE_GPU_RESOURCES_H
 
#include "gl_common.h"
#include "light_probes.h" /* SH_TEXTURE_COUNT */
 
enum { IBL_TEXTURE_COUNT = 3 };
 
enum { TEXTURE_UNIT_IBL_START = 15 };
 
typedef struct SceneGPUResources {
    /* --- Geometry Buffers --- */
    GLuint icosphere_vao; 
    GLuint icosphere_vbo; 
    GLuint icosphere_nbo; 
    GLuint icosphere_ebo; 
    GLuint quad_vbo;      
    GLuint wire_cube_vbo; 
    GLuint wire_quad_vbo; 
    GLuint empty_vao;     
    /* --- Textures --- */
    GLuint hdr_texture;             
    GLuint recycled_hdr_tex;        
    GLuint spec_prefiltered_tex;    
    GLuint irradiance_tex;          
    GLuint brdf_lut_tex;            
    GLuint dummy_black_tex;         
    GLuint dummy_white_tex;         
    GLuint transition_snapshot_tex; 
    /* --- Compute Programs --- */
    GLuint spmap_program;     
    GLuint irmap_program;     
    GLuint lum_pass1_program; 
    GLuint lum_pass2_program; 
    /* --- Storage Buffers --- */
    GLuint lum_ssbo[2]; 
    /* --- Billboard UBO --- */
    GLuint billboard_ubo;    
    void* billboard_ubo_ptr; 
    /* --- IBL Binding Cache (Tier 5 — units 15-17) --- */
    GLuint bound_ibl_textures[IBL_TEXTURE_COUNT]; 
    /* --- SH/Probe Binding Cache (Tier 3 — units 8-14 + SSBO 3) --- */
    GLuint bound_sh_textures[SH_TEXTURE_COUNT]; 
    GLuint bound_probe_ssbo; 
} SceneGPUResources;
 
#endif /* SCENE_GPU_RESOURCES_H */