package renderer

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

PIPELINE_MAX_PASSES :: 8

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

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

set_pipeline :: proc(
    renderer: ^Renderer,
    passes: []^Pass,
){
    assert(renderer != nil)

    clear_pipeline(renderer)

    for p in passes {
        if !add_pass_to_pipeline(renderer, p) {
            break
        }
    }
}

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

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

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

    return true
}