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\"precision mediump float;\\n\"\n : \"precision mediump float;\\n\";\n source = source.replace(\"#version 300 es\", `#version 300 es\\n${precisionPrefix}`);\n }\n\n const shader = gl.createShader(type);\n if (!shader) {\n console.error(\"Failed to create shader\");\n return null;\n }\n\n gl.shaderSource(shader, source);\n gl.compileShader(shader);\n\n if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n const errorLog = gl.getShaderInfoLog(shader);\n console.error(`Shader compilation error: ${errorLog}`);\n setError(`Shader compilation error: ${errorLog}`);\n gl.deleteShader(shader);\n return null;\n }\n\n return shader;\n };\n\n const createProgram = (vs, fs) => {\n // Use default shaders if not provided\n const vertSource = vs || defaultVertexShader;\n const fragSource = fs || defaultFragmentShader;\n\n // Compile shaders\n const vert = compileShader(gl.VERTEX_SHADER, vertSource);\n const frag = compileShader(gl.FRAGMENT_SHADER, fragSource);\n\n // Check if both shaders compiled successfully\n if (!vert || !frag) {\n console.error(\"Shader compilation failed\");\n if (vert) gl.deleteShader(vert);\n if (frag) gl.deleteShader(frag);\n return null;\n }\n\n // Create and link program\n const program = gl.createProgram();\n if (!program) {\n console.error(\"Failed to create WebGL program\");\n gl.deleteShader(vert);\n gl.deleteShader(frag);\n return null;\n }\n\n gl.attachShader(program, vert);\n gl.attachShader(program, frag);\n gl.linkProgram(program);\n\n // Check link status\n if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n const errorLog = gl.getProgramInfoLog(program);\n console.error(`Program linking error: ${errorLog}`);\n setError(`Program linking error: ${errorLog}`);\n gl.deleteProgram(program);\n gl.deleteShader(vert);\n gl.deleteShader(frag);\n return null;\n }\n\n // Clean up shaders after linking\n gl.detachShader(program, vert);\n gl.detachShader(program, frag);\n gl.deleteShader(vert);\n gl.deleteShader(frag);\n\n return program;\n };\n\n // Clear canvas\n gl.viewport(0, 0, canvas.width, canvas.height);\n gl.clearColor(0.0, 0.0, 0.0, 1.0);\n gl.clear(gl.COLOR_BUFFER_BIT);\n\n // Render logic\n const program = createProgram(vertexShader, fragmentShader);\n\n if (!program) {\n console.error(\"Failed to create shader program\");\n return;\n }\n\n gl.useProgram(program);\n\n // Create vertex buffer\n const positionBuffer = gl.createBuffer();\n gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);\n gl.bufferData(\n gl.ARRAY_BUFFER,\n new Float32Array([\n -1.0,\n -1.0,\n 1.0,\n -1.0,\n -1.0,\n 1.0,\n 1.0,\n 1.0,\n ]),\n gl.STATIC_DRAW,\n );\n\n // Create texture coordinate buffer\n const texCoordBuffer = gl.createBuffer();\n gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);\n gl.bufferData(\n gl.ARRAY_BUFFER,\n new Float32Array([\n 0.0,\n 0.0,\n 1.0,\n 0.0,\n 0.0,\n 1.0,\n 1.0,\n 1.0,\n ]),\n gl.STATIC_DRAW,\n );\n\n // Position attribute\n const positionAttributeLocation = gl.getAttribLocation(program, \"position\");\n gl.enableVertexAttribArray(positionAttributeLocation);\n gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);\n gl.vertexAttribPointer(positionAttributeLocation, 2, gl.FLOAT, false, 0, 0);\n\n // Texture coordinate attribute\n const texCoordAttributeLocation = gl.getAttribLocation(program, \"texcoord\");\n gl.enableVertexAttribArray(texCoordAttributeLocation);\n gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);\n gl.vertexAttribPointer(texCoordAttributeLocation, 2, gl.FLOAT, false, 0, 0);\n\n // Draw\n gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);\n }, [vertexShader, fragmentShader]);\n\n return (\n

\n \n {error && (\n \n {error}\n

\n )}\n \n );\n}\n\n// Rest of the code remains the same as in the previous implementation\nfunction App() {\n const [shaders, setShaders] = useState([]);\n const [username, setUsername] = useState(\"\");\n const [vertexShader, setVertexShader] = useState(\"\");\n const [fragmentShader, setFragmentShader] = useState(\"\");\n\n useEffect(() => {\n fetchShaders();\n }, []);\n\n const fetchShaders = async () => {\n const response = await fetch(\"/shaders\");\n const data = await response.json();\n setShaders(data);\n };\n\n const handleSubmit = async (e) => {\n e.preventDefault();\n const response = await fetch(\"/submit-shader\", {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({\n username,\n vertexShader: vertexShader || null,\n fragmentShader,\n }),\n });\n\n if (response.ok) {\n fetchShaders();\n setUsername(\"\");\n setVertexShader(\"\");\n setFragmentShader(\"\");\n }\n };\n\n return (\n

🎨 Shader Gallery

\n \n );\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render();\n}\nif (typeof document !== \"undefined\") { client(); }\n\nexport default async function server(request: Request): Promise {\n const { sqlite } = await import(\"https://esm.town/v/stevekrouse/sqlite\");\n const KEY = new URL(import.meta.url).pathname.split(\"/\").at(-1);\n const SCHEMA_VERSION = 2; // Increment schema version to create new table\n\n await sqlite.execute(`\n CREATE TABLE IF NOT EXISTS ${KEY}_shaders_${SCHEMA_VERSION} (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n username TEXT NOT NULL,\n vertexShader TEXT,\n fragmentShader TEXT NOT NULL,\n timestamp TEXT DEFAULT CURRENT_TIMESTAMP\n )\n `);\n\n if (request.method === \"POST\" && new URL(request.url).pathname === \"/submit-shader\") {\n const { username, vertexShader, fragmentShader } = await request.json();\n await sqlite.execute(\n `\n INSERT INTO ${KEY}_shaders_${SCHEMA_VERSION} \n (username, vertexShader, fragmentShader) \n VALUES (?, ?, ?)\n `,\n [username, vertexShader, fragmentShader],\n );\n return new Response(JSON.stringify({ success: true }), {\n headers: { \"Content-Type\": \"application/json\" },\n });\n }\n\n if (request.method === \"GET\" && new URL(request.url).pathname === \"/shaders\") {\n const result = await sqlite.execute(`\n SELECT username, vertexShader, fragmentShader \n FROM ${KEY}_shaders_${SCHEMA_VERSION} \n ORDER BY timestamp DESC \n LIMIT 20\n `);\n return new Response(JSON.stringify(result.rows), {\n headers: { \"Content-Type\": \"application/json\" },\n });\n }\n\n return new Response(\n `\n \n \n Shader Gallery\n \n \n \n

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🎨 Shader Gallery

{shader.username}'s Shader