feat: iswebGl2 fixed (#202)

* feat: iswebGl2 fixed * fix: ts error fixed * fix: namespace change --------- Co-authored-by: duxinyue.dxy <[email protected]>
antvis · Oct 9, 2024 · 113e2e6 · 113e2e6
1 parent 972cdeb
commit 113e2e6
Showing 1 changed file with 11 additions and 6 deletions.
diff --git a/src/webgl/utils.ts b/src/webgl/utils.ts
@@ -24,18 +24,23 @@ import type { Sampler_GL } from './Sampler';
 import type { Texture_GL } from './Texture';
 
 // @see https://github.com/visgl/luma.gl/blob/30a1039573576d73641de7c1ba222e8992eb526e/modules/gltools/src/utils/webgl-checks.ts#L22
+let isWebGL2Flag;
 export function isWebGL2(
  gl: WebGL2RenderingContext | WebGLRenderingContext,
 ): gl is WebGL2RenderingContext {
- if (
- typeof WebGL2RenderingContext !== 'undefined' &&
- gl instanceof WebGL2RenderingContext
- ) {
- return true;
+
+ if(isWebGL2Flag !== undefined) {
+ return isWebGL2Flag;
+ }
+ if (typeof WebGL2RenderingContext !== 'undefined' &&
+ gl instanceof WebGL2RenderingContext) {
+ isWebGL2Flag = true;
+ return true;
  }
  // Look for debug contexts, headless gl etc
  // @ts-ignore
- return Boolean(gl && gl._version === 2);
+ isWebGL2Flag = Boolean(gl && gl._version === 2);
+ return isWebGL2Flag;
 }
 
 export function isTextureFormatCompressed(fmt: Format): boolean {