{"record":{"id":"98ac6df2317c32cd","repo":"remotion-dev/remotion","slug":"failed-to-create-webgl-program-98ac6d","errorCode":null,"errorMessage":"Failed to create WebGL program","messagePattern":"Failed to create WebGL program","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/effects/src/pattern.ts","lineNumber":423,"sourceCode":"\tgl.shaderSource(shader, source);\n\tgl.compileShader(shader);\n\tif (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n\t\tconst log = gl.getShaderInfoLog(shader);\n\t\tgl.deleteShader(shader);\n\t\tthrow new Error(`Pattern shader compile failed: ${log ?? '(no log)'}`);\n\t}\n\n\treturn shader;\n};\n\nconst linkProgram = (\n\tgl: WebGL2RenderingContext,\n\tvs: WebGLShader,\n\tfs: WebGLShader,\n): WebGLProgram => {\n\tconst program = gl.createProgram();\n\tif (!program) {\n\t\tthrow new Error('Failed to create WebGL program');\n\t}\n\n\tgl.attachShader(program, vs);\n\tgl.attachShader(program, fs);\n\tgl.linkProgram(program);\n\tif (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n\t\tconst log = gl.getProgramInfoLog(program);\n\t\tgl.deleteProgram(program);\n\t\tthrow new Error(`Pattern program link failed: ${log ?? '(no log)'}`);\n\t}\n\n\treturn program;\n};\n\nexport const pattern = createEffect<PatternParams, PatternState>({\n\ttype: 'dev.remotion.effects.pattern',\n\tlabel: 'pattern()',\n\tdocumentationLink: 'https://www.remotion.dev/docs/effects/pattern',","sourceCodeStart":405,"sourceCodeEnd":441,"githubUrl":"https://github.com/remotion-dev/remotion/blob/78fe4bb3fdb5a2cd68724393d63cb223db333fa7/packages/effects/src/pattern.ts#L405-L441","documentation":"pattern() links the compiled vertex and fragment shaders into a program. gl.createProgram() returns null only when the GL context is lost or the driver refuses the allocation. This guard fails fast instead of calling attachShader/linkProgram on null.","triggerScenarios":"Reached in linkProgram() after both shaders compiled successfully. createProgram returns null because the context was lost between shader compilation and program creation, during pattern effect setup.","commonSituations":"Context loss mid-setup; driver resource exhaustion on heavy compositions; GPU reset during a render batch.","solutions":["Guarantee a live WebGL2 context (handle webglcontextlost/restored).","Reduce concurrent GPU effects per composition.","Use a stable GPU/SwiftShader backend in headless rendering.","Update GPU drivers."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n  initPattern(canvas); // links the pattern program\n} catch (err) {\n  if (isContextLost(canvas)) waitForRestore(canvas).then(initPattern);\n  else throw err;\n}","preventionTips":["Maintain a live WebGL2 context (handle webglcontextlost/restored).","Limit concurrent GPU effects per composition to stay under driver limits.","Render with a stable GPU or SwiftShader backend.","Keep GPU drivers current."],"tags":["webgl","gpu","program","pattern-effect","context-loss","rendering"],"backgroundTag":null,"analyzedSha":"78fe4bb3fdb5a2cd68724393d63cb223db333fa7","analyzedAt":"2026-08-12T17:18:50.444Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}