Log instead of throw on attmept to upload unsupported page count

Fixes microsoft#232979

Author: Tyriar

src/vs/editor/browser/gpu/atlas/textureAtlasPage.ts

@@ -83,6 +83,8 @@ export class TextureAtlasPage extends Disposable implements IReadableTextureAtla
 
 		// Ensure the glyph was allocated
 		if (glyph === undefined) {
+			// TODO: undefined here can mean the glyph was too large for a slab on the page, this
+			// can lead to big problems if we don't handle it properly https://github.com/microsoft/vscode/issues/232984
 			return undefined;
 		}
 

src/vs/editor/browser/viewParts/viewLinesGpu/viewLinesGpu.ts

@@ -176,12 +176,12 @@ export class ViewLinesGpu extends ViewPart implements IViewLines {
 		this._renderStrategy = this._register(this._instantiationService.createInstance(FullFileRenderStrategy, this._context, this._device, this.canvas, atlas));
 
 		this._glyphStorageBuffer[0] = this._register(GPULifecycle.createBuffer(this._device, {
-			label: 'Monaco glyph storage buffer',
+			label: 'Monaco glyph storage buffer [0]',
 			size: GlyphStorageBufferInfo.BytesPerEntry * TextureAtlasPage.maximumGlyphCount,
 			usage: GPUBufferUsage.STORAGE | GPUBufferUsage.COPY_DST,
 		})).object;
 		this._glyphStorageBuffer[1] = this._register(GPULifecycle.createBuffer(this._device, {
-			label: 'Monaco glyph storage buffer',
+			label: 'Monaco glyph storage buffer [1]',
 			size: GlyphStorageBufferInfo.BytesPerEntry * TextureAtlasPage.maximumGlyphCount,
 			usage: GPUBufferUsage.STORAGE | GPUBufferUsage.COPY_DST,
 		})).object;
@@ -289,6 +289,12 @@ export class ViewLinesGpu extends ViewPart implements IViewLines {
 
 	private _updateAtlasStorageBufferAndTexture() {
 		for (const [layerIndex, page] of ViewGpuContext.atlas.pages.entries()) {
+			if (layerIndex >= 2) {
+				// TODO: Support arbitrary number of layers
+				console.log(`Attempt to upload atlas page [${layerIndex}], only 2 are supported currently`);
+				continue;
+			}
+
 			// Skip the update if it's already the latest version
 			if (page.version === this._atlasGpuTextureVersions[layerIndex]) {
 				continue;