{"record":{"id":"88dd7995c7f99070","repo":"remotion-dev/remotion","slug":"failed-to-create-webgl-buffer-88dd79","errorCode":null,"errorMessage":"Failed to create WebGL buffer","messagePattern":"Failed to create WebGL buffer","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/effects/src/drop-shadow/drop-shadow-runtime.ts","lineNumber":177,"sourceCode":"\t\tgl,\n\t\tDROP_SHADOW_VS,\n\t\tDROP_SHADOW_COMPOSITE_FS,\n\t);\n\n\tconst vao = gl.createVertexArray();\n\tif (!vao) {\n\t\tthrow new Error('Failed to create WebGL vertex array');\n\t}\n\n\tgl.bindVertexArray(vao);\n\n\tconst data = new Float32Array([\n\t\t-1, -1, 0, 0, 1, -1, 1, 0, -1, 1, 0, 1, 1, 1, 1, 1,\n\t]);\n\n\tconst vbo = gl.createBuffer();\n\tif (!vbo) {\n\t\tthrow new Error('Failed to create WebGL buffer');\n\t}\n\n\tgl.bindBuffer(gl.ARRAY_BUFFER, vbo);\n\tgl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);\n\n\tgl.enableVertexAttribArray(0);\n\tgl.vertexAttribPointer(0, 2, gl.FLOAT, false, 16, 0);\n\tgl.enableVertexAttribArray(1);\n\tgl.vertexAttribPointer(1, 2, gl.FLOAT, false, 16, 8);\n\n\tgl.bindVertexArray(null);\n\n\tconst textureSource = createRgbaTexture(gl);\n\tconst textureShadowA = createRgbaTexture(gl);\n\tconst textureShadowB = createRgbaTexture(gl);\n\n\tconst framebuffer = gl.createFramebuffer();\n\tif (!framebuffer) {","sourceCodeStart":159,"sourceCodeEnd":195,"githubUrl":"https://github.com/remotion-dev/remotion/blob/78fe4bb3fdb5a2cd68724393d63cb223db333fa7/packages/effects/src/drop-shadow/drop-shadow-runtime.ts#L159-L195","documentation":"Thrown by setupDropShadow when gl.createBuffer() returns null. A null buffer signals a lost or exhausted WebGL2 context. Reached immediately after the VAO is bound, while allocating the shared fullscreen-quad vertex buffer.","triggerScenarios":"Lost WebGL2 context, exhausted buffer object limit, or GPU memory pressure during setupDropShadow().","commonSituations":"Buffer leaks from effects whose cleanup never ran; many simultaneous drop-shadow effects; GPU driver crash; headless rendering under memory pressure.","solutions":["Verify cleanupDropShadow runs (gl.deleteBuffer on unmount).","Reduce simultaneous WebGL2 effects.","Reload to release leaked resources.","Use SwiftShader with adequate memory for headless runs.","Update GPU drivers."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"const supportsWebGL2 = () => {\n  try {\n    return !!document.createElement('canvas').getContext('webgl2');\n  } catch {\n    return false;\n  }\n};","typeGuard":null,"tryCatchPattern":"try {\n  state = setupDropShadow(canvas);\n} catch (err) {\n  if (err instanceof Error && /WebGL buffer/i.test(err.message)) {\n    console.error('Drop-shadow buffer allocation failed:', err.message);\n  } else {\n    throw err;\n  }\n}","preventionTips":["Verify cleanupDropShadow runs (gl.deleteBuffer) on unmount.","Reduce simultaneous WebGL2 effects; reload to free leaked buffers.","Use SwiftShader with adequate memory for headless rendering; update drivers."],"tags":["webgl2","drop-shadow","buffer","gpu","runtime"],"backgroundTag":null,"analyzedSha":"78fe4bb3fdb5a2cd68724393d63cb223db333fa7","analyzedAt":"2026-08-12T17:18:50.444Z","schemaVersion":2},"datasetVersion":"2026-08-12T18:17:37.767Z"}