/** @jsxImportSource https://esm.sh/react */ import Cerebras from "https://esm.sh/@cerebras/cerebras_cloud_sdk"; import React, { useState, useEffect, useRef, useCallback } from "https://esm.sh/react"; import { createRoot } from "https://esm.sh/react-dom/client"; function debounce(func: Function, wait: number) { let timeout: number | undefined; return function executedFunction(...args: any[]) { const later = () => { clearTimeout(timeout); func(...args); }; clearTimeout(timeout); timeout = setTimeout(later, wait); }; } function App() { const [prompt, setPrompt] = useState("Generate a colorful gradient shader"); const [code, setCode] = useState(` precision mediump float; uniform float u_time; void main() { vec2 uv = gl_FragCoord.xy / vec2(400.0, 400.0); gl_FragColor = vec4(uv.x, uv.y, 0.5, 1.0); } `.trim()); const [loading, setLoading] = useState(false); const [performance, setPerformance] = useState< { tokensPerSecond: number; totalTokens: number; time: number; } | null >(null); const canvasRef = useRef(null); const [retryCount, setRetryCount] = useState(0); const animationRef = useRef(); const [errorMessage, setErrorMessage] = useState(null); const debouncedRenderShader = useCallback( debounce((canvas: HTMLCanvasElement, fragmentShaderSource: string) => { renderShader(canvas, fragmentShaderSource); }, 300), [] ); useEffect(() => { let startTime: number; const animate = (time: number) => { if (!startTime) startTime = time; const elapsedTime = (time - startTime) / 1000; // Convert to seconds if (canvasRef.current) { try { renderShader(canvasRef.current, code, elapsedTime); setErrorMessage(null); } catch (error) { console.error("Shader error:", error); setErrorMessage(error.message); if (retryCount < 3) { setRetryCount(prevCount => prevCount + 1); handleSubmit(new Event('submit') as React.FormEvent, error.message); } else { cancelAnimationFrame(animationRef.current!); setErrorMessage("Failed to generate a valid shader after 3 attempts. Please try a different prompt."); } } } if (retryCount < 3) { animationRef.current = requestAnimationFrame(animate); } }; if (canvasRef.current) { animationRef.current = requestAnimationFrame(animate); } return () => { if (animationRef.current) cancelAnimationFrame(animationRef.current); }; }, [code, debouncedRenderShader, retryCount]); async function handleSubmit(e: React.FormEvent, shaderErrorMessage?: string) { if (e) e.preventDefault(); setLoading(true); if (!shaderErrorMessage) setRetryCount(0); try { const response = await fetch("/", { method: "POST", body: JSON.stringify({ prompt, currentCode: code, errorMessage: shaderErrorMessage }), headers: { "Content-Type": "application/json" }, }); const result = await response.json(); setCode(result.code); setPerformance(result.performance); } catch (error) { console.error("Error:", error); } finally { setLoading(false); } } return (

Cerebras Shader Generator & Editor

{performance && (

🚀 {performance.tokensPerSecond.toFixed(2)} tokens/s 📊 {performance.totalTokens} tokens ⏱️ {performance.time.toFixed(2)}s

)} {errorMessage && (

{errorMessage}

)}

setCode(e.target.value)}
            spellCheck={false}
            className="code-editor"
          />
        </div>
        <div className="preview-section">
          <canvas ref={canvasRef} width="400" height="400" />
        </div>
      </div>
    </div>
  );
}

function client() {
  createRoot(document.getElementById("root")!).render(<App />);
}

if (typeof document !== "undefined") {
  client();
}

function renderShader(canvas: HTMLCanvasElement, fragmentShaderSource: string, time: number) {
  const gl = canvas.getContext("webgl");
  if (!gl) {
    console.error("WebGL not supported");
    return;
  }

const vertexShaderSource = `
    attribute vec4 a_position;
    void main() {
      gl_Position = a_position;
    }
  `;

function createShader(gl: WebGLRenderingContext, type: number, source: string) {
    const shader = gl.createShader(type);
    if (!shader) return null;
    gl.shaderSource(shader, source);
    gl.compileShader(shader);
    if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
      const error = gl.getShaderInfoLog(shader);
      gl.deleteShader(shader);
      throw new Error(error);
    }
    return shader;
  }

const vertexShader = createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
  const fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);

if (!vertexShader || !fragmentShader) {
    throw new Error("Error creating shaders");
  }

const program = gl.createProgram();
  if (!program) {
    console.error("Error creating program");
    return;
  }

gl.attachShader(program, vertexShader);
  gl.attachShader(program, fragmentShader);
  gl.linkProgram(program);

if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
    throw new Error(gl.getProgramInfoLog(program));
  }

const timeUniformLocation = gl.getUniformLocation(program, "u_time");
  gl.uniform1f(timeUniformLocation, time);

const positionAttributeLocation = gl.getAttribLocation(program, "a_position");
  const positionBuffer = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);

const positions = [
    -1, -1,
    1, -1,
    -1, 1,
    1, 1,
  ];
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);

gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
  gl.clearColor(0, 0, 0, 0);
  gl.clear(gl.COLOR_BUFFER_BIT);

gl.useProgram(program);
  gl.enableVertexAttribArray(positionAttributeLocation);
  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);

gl.vertexAttribPointer(
    positionAttributeLocation,
    2,
    gl.FLOAT,
    false,
    0,
    0
  );

gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
}

function extractGLSLCode(text: string): string {
  const glslMatch = text.match(/```glsl\n([\s\S]*?)\n```/);
  return glslMatch 
    ? glslMatch[1].trim()
    : text.trim();
}

export default async function server(req: Request): Promise<Response> {
  if (req.method === "POST") {
    const client = new Cerebras();
    const { prompt, currentCode, errorMessage } = await req.json();

if (currentCode) {
      messages.push({ role: "user", content: "Modify this code:\n" + currentCode });
    }

if (errorMessage) {
      messages.push({ role: "user", content: `The previous shader code resulted in the following error. Please fix it:\n${errorMessage}` });
    }

const completion = await client.chat.completions.create({
      messages,
      model: "llama3.1-70b",
    });
    const timeInSeconds = completion.time_info.completion_time;
    const totalTokens = completion.usage?.completion_tokens || 0;

const code = extractGLSLCode(completion.choices[0].message.content);

return new Response(
      JSON.stringify({
        code,
        performance: {
          tokensPerSecond: totalTokens / timeInSeconds,
          totalTokens,
          time: timeInSeconds,
        },
      }),
      {
        headers: { "Content-Type": "application/json" },
      },
    );
  }

return new Response(
    `
    <!DOCTYPE html>
    <html>
      <head>
        <title>Cerebras Shader Generator & Editor</title>
        <style>${css}</style>
      </head>
      <body>
        <div id="root"></div>
        <script src="https://esm.town/v/std/catch"></script>
        <script type="module" src="${import.meta.url}"></script>
      </body>
    </html>
  `,
    {
      headers: { "Content-Type": "text/html" },
    },
  );
}

.error-message {
    background-color: #ff4444;
    color: white;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
  }
`;</article></body></html>

problem