// luma.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { assert } from '@luma.gl/core';
import { withGLParameters } from "../context/state-tracker/with-parameters.js";
// Should collapse during minification
const GL_DEPTH_BUFFER_BIT = 0x00000100;
const GL_STENCIL_BUFFER_BIT = 0x00000400;
const GL_COLOR_BUFFER_BIT = 0x00004000;
const GL_COLOR = 0x1800;
const GL_DEPTH = 0x1801;
const GL_STENCIL = 0x1802;
const GL_DEPTH_STENCIL = 0x84f9;
// Should disappear if asserts are removed
const ERR_ARGUMENTS = 'clear: bad arguments';
/**
 * Optionally clears depth, color and stencil buffers
 * @deprecated Set clear color when creating a RenderPass.
 */
export function clear(device, options) {
    const { framebuffer = null, color = null, depth = null, stencil = null } = options || {};
    const parameters = {};
    if (framebuffer) {
        parameters.framebuffer = framebuffer;
    }
    let clearFlags = 0;
    if (color) {
        clearFlags |= GL_COLOR_BUFFER_BIT;
        if (color !== true) {
            parameters.clearColor = color;
        }
    }
    if (depth) {
        clearFlags |= GL_DEPTH_BUFFER_BIT;
        if (depth !== true) {
            parameters.clearDepth = depth;
        }
    }
    if (stencil) {
        clearFlags |= GL_STENCIL_BUFFER_BIT;
        if (depth !== true) {
            parameters.clearStencil = depth;
        }
    }
    assert(clearFlags !== 0, ERR_ARGUMENTS);
    // Temporarily set any clear "colors" and call clear
    const gl = device.gl;
    withGLParameters(gl, parameters, () => {
        gl.clear(clearFlags);
    });
}
/**
 * WebGL2 - clear a specific drawing buffer
 * @deprecated Set clear color when creating a RenderPass
 */
export function clearBuffer(device, options) {
    const { framebuffer = null, buffer = GL_COLOR, drawBuffer = 0, value = [0, 0, 0, 0] } = options || {};
    const gl = device.gl;
    withGLParameters(gl, { framebuffer }, () => {
        // Method selection per OpenGL ES 3 docs
        switch (buffer) {
            case GL_COLOR:
                switch (value.constructor) {
                    case Int32Array:
                        gl.clearBufferiv(buffer, drawBuffer, value);
                        break;
                    case Uint32Array:
                        gl.clearBufferuiv(buffer, drawBuffer, value);
                        break;
                    case Float32Array:
                    default:
                        gl.clearBufferfv(buffer, drawBuffer, value);
                }
                break;
            case GL_DEPTH:
                gl.clearBufferfv(GL_DEPTH, 0, [value]);
                break;
            case GL_STENCIL:
                gl.clearBufferiv(GL_STENCIL, 0, [value]);
                break;
            case GL_DEPTH_STENCIL:
                const [depth, stencil] = value;
                gl.clearBufferfi(GL_DEPTH_STENCIL, 0, depth, stencil);
                break;
            default:
                assert(false, ERR_ARGUMENTS);
        }
    });
}