import { ShaderRegisterCache, ShaderRegisterData, ShaderRegisterElement } from '@awayjs/stage';

import { IPass } from '@awayjs/renderer';

import { LightingShader } from '../shaders/LightingShader';
import { LightPickerBase } from '../lightpickers/LightPickerBase';

/**
 *
 * @class away.pool.Passes
 */
export interface ILightingPass extends IPass
{
	enableLightFallOff: boolean;

	diffuseLightSources: number;

	specularLightSources: number;

	numDirectionalLights: number;

	numPointLights: number;

	numLightProbes: number;

	pointLightsOffset: number;

	directionalLightsOffset: number;

	lightProbesOffset: number;

	lightPicker: LightPickerBase;

	_getPreLightingVertexCode(registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	_getPreLightingFragmentCode(registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	_getPerLightDiffuseFragmentCode(lightDirReg: ShaderRegisterElement, diffuseColorReg: ShaderRegisterElement, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	_getPerLightSpecularFragmentCode(lightDirReg: ShaderRegisterElement, specularColorReg: ShaderRegisterElement, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	_getPerProbeDiffuseFragmentCode(texReg: ShaderRegisterElement, weightReg: string, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	_getPerProbeSpecularFragmentCode(texReg: ShaderRegisterElement, weightReg: string, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;

	/**
	 * Indicates whether the shader uses any shadows.
	 */
	_iUsesShadows(shader: LightingShader): boolean;

	/**
	 * Indicates whether the shader uses any specular component.
	 */
	_iUsesSpecular(shader: LightingShader): boolean;

	/**
	 * Indicates whether the shader uses any diffuse component.
	 */
	_iUsesDiffuse(shader: LightingShader): boolean;
}