playcanvas/build/playcanvas/src/platform/graphics/null/null-graphics-device.js

Open-source WebGL/WebGPU 3D engine for the web

import {
	DEVICETYPE_NULL
} from "../constants.js";
import { GraphicsDevice } from "../graphics-device.js";
import { RenderTarget } from "../render-target.js";
import { NullIndexBuffer } from "./null-index-buffer.js";
import { NullRenderTarget } from "./null-render-target.js";
import { NullShader } from "./null-shader.js";
import { NullTexture } from "./null-texture.js";
import { NullVertexBuffer } from "./null-vertex-buffer.js";
import { NullDrawCommands } from "./null-draw-commands.js";
class NullGraphicsDevice extends GraphicsDevice {
	constructor(canvas, options = {}) {
		super(canvas, options);
		options = this.initOptions;
		this.isNull = true;
		this._deviceType = DEVICETYPE_NULL;
		this.samples = 1;
		this.backBuffer = new RenderTarget({
			name: "Framebuffer",
			graphicsDevice: this,
			depth: this.initOptions.depth,
			stencil: this.supportsStencil,
			samples: this.samples
		});
		this.initDeviceCaps();
	}
	destroy() {
		super.destroy();
	}
	initDeviceCaps() {
		this.disableParticleSystem = true;
		this.precision = "highp";
		this.maxPrecision = "highp";
		this.maxSamples = 4;
		this.maxTextures = 16;
		this.maxTextureSize = 4096;
		this.maxCubeMapSize = 4096;
		this.maxVolumeSize = 4096;
		this.maxColorAttachments = 8;
		this.maxPixelRatio = 1;
		this.maxAnisotropy = 16;
		this.supportsUniformBuffers = false;
		this.supportsAreaLights = true;
		this.supportsGpuParticles = false;
		this.textureFloatRenderable = true;
		this.textureHalfFloatRenderable = true;
		this.supportsImageBitmap = false;
	}
	postInit() {
		super.postInit();
	}
	frameStart() {
		super.frameStart();
	}
	frameEnd() {
		super.frameEnd();
	}
	updateBegin() {
	}
	updateEnd() {
	}
	readPixels(x, y, w, h, pixels) {
	}
	createVertexBufferImpl(vertexBuffer, format) {
		return new NullVertexBuffer(vertexBuffer, format);
	}
	createIndexBufferImpl(indexBuffer) {
		return new NullIndexBuffer(indexBuffer);
	}
	createShaderImpl(shader) {
		return new NullShader(shader);
	}
	createTextureImpl(texture) {
		return new NullTexture(texture);
	}
	createRenderTargetImpl(renderTarget) {
		return new NullRenderTarget(renderTarget);
	}
	createDrawCommandImpl(drawCommands) {
		return new NullDrawCommands();
	}
	createUploadStreamImpl(uploadStream) {
		return null;
	}
	draw(primitive, indexBuffer, numInstances, drawCommands, first = true, last = true) {
	}
	setShader(shader, asyncCompile = false) {
	}
	setBlendState(blendState) {
	}
	setDepthState(depthState) {
	}
	setStencilState(stencilFront, stencilBack) {
	}
	setBlendColor(r, g, b, a) {
	}
	setCullMode(cullMode) {
	}
	setFrontFace(frontFace) {
	}
	setAlphaToCoverage(state) {
	}
	initializeContextCaches() {
		super.initializeContextCaches();
	}
	clear(options) {
	}
	setViewport(x, y, w, h) {
	}
	setScissor(x, y, w, h) {
	}
	copyRenderTarget(source, dest, color, depth) {
		return true;
	}
}
export {
	NullGraphicsDevice
};