280 lines
9.6 KiB
JavaScript
280 lines
9.6 KiB
JavaScript
'use strict';
|
|
|
|
var adapter = require('../../../../environment/adapter.js');
|
|
var Extensions = require('../../../../extensions/Extensions.js');
|
|
var warn = require('../../../../utils/logging/warn.js');
|
|
|
|
"use strict";
|
|
const _GlContextSystem = class _GlContextSystem {
|
|
/** @param renderer - The renderer this System works for. */
|
|
constructor(renderer) {
|
|
/**
|
|
* Features supported by current renderer.
|
|
* @type {object}
|
|
* @readonly
|
|
*/
|
|
this.supports = {
|
|
/** Support for 32-bit indices buffer. */
|
|
uint32Indices: true,
|
|
/** Support for UniformBufferObjects */
|
|
uniformBufferObject: true,
|
|
/** Support for VertexArrayObjects */
|
|
vertexArrayObject: true,
|
|
/** Support for SRGB texture format */
|
|
srgbTextures: true,
|
|
/** Support for wrapping modes if a texture is non-power of two */
|
|
nonPowOf2wrapping: true,
|
|
/** Support for MSAA (antialiasing of dynamic textures) */
|
|
msaa: true,
|
|
/** Support for mipmaps if a texture is non-power of two */
|
|
nonPowOf2mipmaps: true
|
|
};
|
|
this._renderer = renderer;
|
|
this.extensions = /* @__PURE__ */ Object.create(null);
|
|
this.handleContextLost = this.handleContextLost.bind(this);
|
|
this.handleContextRestored = this.handleContextRestored.bind(this);
|
|
}
|
|
/**
|
|
* `true` if the context is lost
|
|
* @readonly
|
|
*/
|
|
get isLost() {
|
|
return !this.gl || this.gl.isContextLost();
|
|
}
|
|
/**
|
|
* Handles the context change event.
|
|
* @param {WebGLRenderingContext} gl - New WebGL context.
|
|
*/
|
|
contextChange(gl) {
|
|
this.gl = gl;
|
|
this._renderer.gl = gl;
|
|
}
|
|
init(options) {
|
|
options = { ..._GlContextSystem.defaultOptions, ...options };
|
|
let multiView = this.multiView = options.multiView;
|
|
if (options.context && multiView) {
|
|
warn.warn("Renderer created with both a context and multiview enabled. Disabling multiView as both cannot work together.");
|
|
multiView = false;
|
|
}
|
|
if (multiView) {
|
|
this.canvas = adapter.DOMAdapter.get().createCanvas(this._renderer.canvas.width, this._renderer.canvas.height);
|
|
} else {
|
|
this.canvas = this._renderer.view.canvas;
|
|
}
|
|
if (options.context) {
|
|
this.initFromContext(options.context);
|
|
} else {
|
|
const alpha = this._renderer.background.alpha < 1;
|
|
const premultipliedAlpha = options.premultipliedAlpha ?? true;
|
|
const antialias = options.antialias && !this._renderer.backBuffer.useBackBuffer;
|
|
this.createContext(options.preferWebGLVersion, {
|
|
alpha,
|
|
premultipliedAlpha,
|
|
antialias,
|
|
stencil: true,
|
|
preserveDrawingBuffer: options.preserveDrawingBuffer,
|
|
powerPreference: options.powerPreference ?? "default"
|
|
});
|
|
}
|
|
}
|
|
ensureCanvasSize(targetCanvas) {
|
|
if (!this.multiView) {
|
|
if (targetCanvas !== this.canvas) {
|
|
warn.warn("multiView is disabled, but targetCanvas is not the main canvas");
|
|
}
|
|
return;
|
|
}
|
|
const { canvas } = this;
|
|
if (canvas.width < targetCanvas.width || canvas.height < targetCanvas.height) {
|
|
canvas.width = Math.max(targetCanvas.width, targetCanvas.width);
|
|
canvas.height = Math.max(targetCanvas.height, targetCanvas.height);
|
|
}
|
|
}
|
|
/**
|
|
* Initializes the context.
|
|
* @protected
|
|
* @param {WebGLRenderingContext} gl - WebGL context
|
|
*/
|
|
initFromContext(gl) {
|
|
this.gl = gl;
|
|
this.webGLVersion = gl instanceof adapter.DOMAdapter.get().getWebGLRenderingContext() ? 1 : 2;
|
|
this.getExtensions();
|
|
this.validateContext(gl);
|
|
this._renderer.runners.contextChange.emit(gl);
|
|
const element = this._renderer.view.canvas;
|
|
element.addEventListener("webglcontextlost", this.handleContextLost, false);
|
|
element.addEventListener("webglcontextrestored", this.handleContextRestored, false);
|
|
}
|
|
/**
|
|
* Initialize from context options
|
|
* @protected
|
|
* @see https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext
|
|
* @param preferWebGLVersion
|
|
* @param {object} options - context attributes
|
|
*/
|
|
createContext(preferWebGLVersion, options) {
|
|
let gl;
|
|
const canvas = this.canvas;
|
|
if (preferWebGLVersion === 2) {
|
|
gl = canvas.getContext("webgl2", options);
|
|
}
|
|
if (!gl) {
|
|
gl = canvas.getContext("webgl", options);
|
|
if (!gl) {
|
|
throw new Error("This browser does not support WebGL. Try using the canvas renderer");
|
|
}
|
|
}
|
|
this.gl = gl;
|
|
this.initFromContext(this.gl);
|
|
}
|
|
/** Auto-populate the {@link GlContextSystem.extensions extensions}. */
|
|
getExtensions() {
|
|
const { gl } = this;
|
|
const common = {
|
|
anisotropicFiltering: gl.getExtension("EXT_texture_filter_anisotropic"),
|
|
floatTextureLinear: gl.getExtension("OES_texture_float_linear"),
|
|
s3tc: gl.getExtension("WEBGL_compressed_texture_s3tc"),
|
|
s3tc_sRGB: gl.getExtension("WEBGL_compressed_texture_s3tc_srgb"),
|
|
// eslint-disable-line camelcase
|
|
etc: gl.getExtension("WEBGL_compressed_texture_etc"),
|
|
etc1: gl.getExtension("WEBGL_compressed_texture_etc1"),
|
|
pvrtc: gl.getExtension("WEBGL_compressed_texture_pvrtc") || gl.getExtension("WEBKIT_WEBGL_compressed_texture_pvrtc"),
|
|
atc: gl.getExtension("WEBGL_compressed_texture_atc"),
|
|
astc: gl.getExtension("WEBGL_compressed_texture_astc"),
|
|
bptc: gl.getExtension("EXT_texture_compression_bptc"),
|
|
rgtc: gl.getExtension("EXT_texture_compression_rgtc"),
|
|
loseContext: gl.getExtension("WEBGL_lose_context")
|
|
};
|
|
if (this.webGLVersion === 1) {
|
|
this.extensions = {
|
|
...common,
|
|
drawBuffers: gl.getExtension("WEBGL_draw_buffers"),
|
|
depthTexture: gl.getExtension("WEBGL_depth_texture"),
|
|
vertexArrayObject: gl.getExtension("OES_vertex_array_object") || gl.getExtension("MOZ_OES_vertex_array_object") || gl.getExtension("WEBKIT_OES_vertex_array_object"),
|
|
uint32ElementIndex: gl.getExtension("OES_element_index_uint"),
|
|
// Floats and half-floats
|
|
floatTexture: gl.getExtension("OES_texture_float"),
|
|
floatTextureLinear: gl.getExtension("OES_texture_float_linear"),
|
|
textureHalfFloat: gl.getExtension("OES_texture_half_float"),
|
|
textureHalfFloatLinear: gl.getExtension("OES_texture_half_float_linear"),
|
|
vertexAttribDivisorANGLE: gl.getExtension("ANGLE_instanced_arrays"),
|
|
srgb: gl.getExtension("EXT_sRGB")
|
|
};
|
|
} else {
|
|
this.extensions = {
|
|
...common,
|
|
colorBufferFloat: gl.getExtension("EXT_color_buffer_float")
|
|
};
|
|
const provokeExt = gl.getExtension("WEBGL_provoking_vertex");
|
|
if (provokeExt) {
|
|
provokeExt.provokingVertexWEBGL(provokeExt.FIRST_VERTEX_CONVENTION_WEBGL);
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* Handles a lost webgl context
|
|
* @param {WebGLContextEvent} event - The context lost event.
|
|
*/
|
|
handleContextLost(event) {
|
|
event.preventDefault();
|
|
if (this._contextLossForced) {
|
|
this._contextLossForced = false;
|
|
setTimeout(() => {
|
|
if (this.gl.isContextLost()) {
|
|
this.extensions.loseContext?.restoreContext();
|
|
}
|
|
}, 0);
|
|
}
|
|
}
|
|
/** Handles a restored webgl context. */
|
|
handleContextRestored() {
|
|
this._renderer.runners.contextChange.emit(this.gl);
|
|
}
|
|
destroy() {
|
|
const element = this._renderer.view.canvas;
|
|
this._renderer = null;
|
|
element.removeEventListener("webglcontextlost", this.handleContextLost);
|
|
element.removeEventListener("webglcontextrestored", this.handleContextRestored);
|
|
this.gl.useProgram(null);
|
|
this.extensions.loseContext?.loseContext();
|
|
}
|
|
/**
|
|
* this function can be called to force a webGL context loss
|
|
* this will release all resources on the GPU.
|
|
* Useful if you need to put Pixi to sleep, and save some GPU memory
|
|
*
|
|
* As soon as render is called - all resources will be created again.
|
|
*/
|
|
forceContextLoss() {
|
|
this.extensions.loseContext?.loseContext();
|
|
this._contextLossForced = true;
|
|
}
|
|
/**
|
|
* Validate context.
|
|
* @param {WebGLRenderingContext} gl - Render context.
|
|
*/
|
|
validateContext(gl) {
|
|
const attributes = gl.getContextAttributes();
|
|
if (attributes && !attributes.stencil) {
|
|
warn.warn("Provided WebGL context does not have a stencil buffer, masks may not render correctly");
|
|
}
|
|
const supports = this.supports;
|
|
const isWebGl2 = this.webGLVersion === 2;
|
|
const extensions = this.extensions;
|
|
supports.uint32Indices = isWebGl2 || !!extensions.uint32ElementIndex;
|
|
supports.uniformBufferObject = isWebGl2;
|
|
supports.vertexArrayObject = isWebGl2 || !!extensions.vertexArrayObject;
|
|
supports.srgbTextures = isWebGl2 || !!extensions.srgb;
|
|
supports.nonPowOf2wrapping = isWebGl2;
|
|
supports.nonPowOf2mipmaps = isWebGl2;
|
|
supports.msaa = isWebGl2;
|
|
if (!supports.uint32Indices) {
|
|
warn.warn("Provided WebGL context does not support 32 index buffer, large scenes may not render correctly");
|
|
}
|
|
}
|
|
};
|
|
/** @ignore */
|
|
_GlContextSystem.extension = {
|
|
type: [
|
|
Extensions.ExtensionType.WebGLSystem
|
|
],
|
|
name: "context"
|
|
};
|
|
/** The default options for the system. */
|
|
_GlContextSystem.defaultOptions = {
|
|
/**
|
|
* {@link WebGLOptions.context}
|
|
* @default null
|
|
*/
|
|
context: null,
|
|
/**
|
|
* {@link WebGLOptions.premultipliedAlpha}
|
|
* @default true
|
|
*/
|
|
premultipliedAlpha: true,
|
|
/**
|
|
* {@link WebGLOptions.preserveDrawingBuffer}
|
|
* @default false
|
|
*/
|
|
preserveDrawingBuffer: false,
|
|
/**
|
|
* {@link WebGLOptions.powerPreference}
|
|
* @default default
|
|
*/
|
|
powerPreference: void 0,
|
|
/**
|
|
* {@link WebGLOptions.webGLVersion}
|
|
* @default 2
|
|
*/
|
|
preferWebGLVersion: 2,
|
|
/**
|
|
* {@link WebGLOptions.multiView}
|
|
* @default false
|
|
*/
|
|
multiView: false
|
|
};
|
|
let GlContextSystem = _GlContextSystem;
|
|
|
|
exports.GlContextSystem = GlContextSystem;
|
|
//# sourceMappingURL=GlContextSystem.js.map
|