package renderer

import "core:mem"
import "core:log"

MAX_PASSES_IN_PIPELINE :: 8

Pipeline :: struct {
    passes: [MAX_PASSES_IN_PIPELINE]^Pass,
    amount_of_passes: u8,
}

clear_pipeline :: proc(renderer: ^Renderer) {
    assert(renderer != nil)
    pipeline := &renderer.pipeline
    
    pipeline.amount_of_passes = 0;
    mem.set(&pipeline.passes[0], 0, MAX_PASSES_IN_PIPELINE * size_of(^Pass))
}

set_pipeline :: proc(renderer: ^Renderer, passes: []^Pass) {
    clear_pipeline(renderer)
    for p in passes {
        if !add_pass_to_pipeline(renderer, p) {
            return
        }
    }
}

@(private="file") add_pass_to_pipeline :: proc(renderer: ^Renderer, pass: ^Pass) -> bool {
    assert(renderer != nil)
    assert(pass != nil)

    pipeline := &renderer.pipeline
    
    if pipeline.amount_of_passes == MAX_PASSES_IN_PIPELINE {
        log.warnf("Failed to add pass '%v' to renderer's pipeline; hit max capacity (%v).", pass.name, MAX_PASSES_IN_PIPELINE)
        return false
    }

    pipeline.passes[pipeline.amount_of_passes] = pass
    pipeline.amount_of_passes += 1

    // log.infof("Successfully added pass '%v' to pipeline.", pass.name)

    return true
}