import { ShaderRegisterCache, ShaderRegisterData, ShaderRegisterElement } from '@awayjs/stage';
import { _IShader_Method } from './_IShader_Method';
/**
 * LightingChunkBase provides an abstract base method for shading methods that uses lights.
 * Used for diffuse and specular shaders only.
 */
export interface _IShader_LightingMethod extends _IShader_Method {
    _totalLightColorReg: ShaderRegisterElement;
    /**
     * A function that is exposed to wrappers in case the strength needs to be controlled
     */
    _modulateFunction: (targetReg: ShaderRegisterElement, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData) => string;
    /**
     * Get the fragment shader code that will be needed before any per-light code is added.
     * @param methodVO The MethodVO object containing the method data for the currently compiled material pass.
     * @param regCache The register cache used during the compilation.
     * @private
     */
    _getFragmentPreLightingCode(registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;
    /**
     * Get the fragment shader code that will generate the code relevant to a single light.
     *
     * @param methodVO The MethodVO object containing the method data for the currently compiled material pass.
     * @param lightDirReg The register containing the light direction vector.
     * @param lightColReg The register containing the light colour.
     * @param regCache The register cache used during the compilation.
     */
    _getFragmentCodePerLight(lightDirReg: ShaderRegisterElement, lightColReg: ShaderRegisterElement, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;
    /**
     * Get the fragment shader code that will generate the code relevant to a single light probe object.
     *
     * @param methodVO The MethodVO object containing the method data for the currently compiled material pass.
     * @param cubeMapReg The register containing the cube map for the current probe
     * @param weightRegister A string representation of the register + component containing the current weight
     * @param regCache The register cache providing any necessary registers to the shader
     */
    _getFragmentCodePerProbe(cubeMapReg: ShaderRegisterElement, weightRegister: string, registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;
}
//# sourceMappingURL=_IShader_LightingMethod.d.ts.map