fabric/dist/src/filters/GLProbes/WebGLProbe.min.mjs.map

Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.

{"version":3,"file":"WebGLProbe.min.mjs","names":[],"sources":["../../../../src/filters/GLProbes/WebGLProbe.ts"],"sourcesContent":["import { log } from '../../util/internals/console';\nimport { GLProbe } from './GLProbe';\nimport type { GLPrecision } from './GLProbe';\n\n/**\n * Lazy initialize WebGL constants\n */\nexport class WebGLProbe extends GLProbe {\n  declare maxTextureSize?: number;\n\n  /**\n   * Tests if webgl supports certain precision\n   * @param {WebGL} Canvas WebGL context to test on\n   * @param {GLPrecision} Precision to test can be any of following\n   * @returns {Boolean} Whether the user's browser WebGL supports given precision.\n   */\n  private testPrecision(\n    gl: WebGLRenderingContext,\n    precision: GLPrecision,\n  ): boolean {\n    const fragmentSource = `precision ${precision} float;\\nvoid main(){}`;\n    const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n    if (!fragmentShader) {\n      return false;\n    }\n    gl.shaderSource(fragmentShader, fragmentSource);\n    gl.compileShader(fragmentShader);\n    return !!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS);\n  }\n\n  /**\n   * query browser for WebGL\n   */\n  queryWebGL(canvas: HTMLCanvasElement) {\n    const gl = canvas.getContext('webgl');\n    if (gl) {\n      this.maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);\n      this.GLPrecision = (['highp', 'mediump', 'lowp'] as const).find(\n        (precision) => this.testPrecision(gl, precision),\n      );\n      gl.getExtension('WEBGL_lose_context')!.loseContext();\n      log('log', `WebGL: max texture size ${this.maxTextureSize}`);\n    }\n  }\n\n  isSupported(textureSize: number) {\n    return !!this.maxTextureSize && this.maxTextureSize >= textureSize;\n  }\n}\n"],"mappings":"uGAOA,IAAa,EAAb,cAAgC,CAAA,CAS9B,cACE,EACA,EAAA,CAEA,IAAM,EAAiB,aAAa,EAAA,wBAC9B,EAAiB,EAAG,aAAa,EAAG,gBAAA,CAC1C,MAAA,CAAA,CAAK,IAGL,EAAG,aAAa,EAAgB,EAAA,CAChC,EAAG,cAAc,EAAA,CAAA,CAAA,CACR,EAAG,mBAAmB,EAAgB,EAAG,eAAA,EAMpD,WAAW,EAAA,CACT,IAAM,EAAK,EAAO,WAAW,QAAA,CACzB,IACF,KAAK,eAAiB,EAAG,aAAa,EAAG,iBAAA,CACzC,KAAK,YAAe,CAAC,QAAS,UAAW,OAAA,CAAkB,KACxD,GAAc,KAAK,cAAc,EAAI,EAAA,CAAA,CAExC,EAAG,aAAa,qBAAA,CAAuB,aAAA,CACvC,EAAI,MAAO,2BAA2B,KAAK,iBAAA,EAI/C,YAAY,EAAA,CACV,MAAA,CAAA,CAAS,KAAK,gBAAkB,KAAK,gBAAkB,IAAA,OAAA,KAAA"}