fix:bug

2026-04-02 10:00:57 +08:00
parent dbf5c942a6
commit 198d8534ad
5 changed files with 921 additions and 134 deletions
--- a/display.js
+++ b/display.js
@@ -13,6 +13,27 @@ const backBtn = document.getElementById("back-btn");

 const API_BASE = "/api/shaders";

+/** Grid previews: limit fill-rate so many cards can stay near 60fps (detail view uses full quality). */
+const PREVIEW_MAX_PIXEL_RATIO = 1.25;
+const PREVIEW_MAX_BUFFER_LONG_SIDE = 520;
+const DETAIL_MAX_PIXEL_RATIO = 2;
+const DETAIL_MAX_BUFFER_LONG_SIDE = 2560;
+
+const GL_CONTEXT_OPTS = {
+  alpha: false,
+  antialias: false,
+  depth: false,
+  stencil: false,
+  powerPreference: "high-performance",
+  desynchronized: true,
+};
+
+/** Browsers cap concurrent WebGL contexts (~8); keep grid below so detail view + pool stay safe. */
+const MAX_GRID_WEBGL_CONTEXTS = 7;
+const WEBGL_TEARDOWN_DEBOUNCE_MS = 450;
+
+let gridGlTouchCounter = 0;
+
 const vertexShaderSource = `#version 300 es
 precision highp float;
 layout(location = 0) in vec2 aPosition;
@@ -85,6 +106,10 @@ uniform float iTime;
 uniform float iTimeDelta;
 uniform int iFrame;
 uniform vec4 iMouse;
+uniform sampler2D iChannel0;
+uniform sampler2D iChannel1;
+uniform sampler2D iChannel2;
+uniform sampler2D iChannel3;
 ${userCode}
 void main() { mainImage(outColor, gl_FragCoord.xy); }`;
 }
@@ -130,7 +155,253 @@ function compileProgram(gl, fragmentShaderSource) {
  return program;
 }

+function createTexture(gl, width, height, data) {
+  const tex = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, tex);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
+  gl.pixelStorei(gl.UNPACK_ALIGNMENT, 1);
+  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);
+  gl.bindTexture(gl.TEXTURE_2D, null);
+  return tex;
+}
+
+function createDefaultChannelTextures(gl, noiseSize = 256) {
+  // iChannel0: audio-like lookup texture (matches many shadertoy audio assumptions)
+  const w0 = 512;
+  const h0 = 2;
+  const d0 = new Uint8Array(w0 * h0 * 4);
+  for (let x = 0; x < w0; x++) {
+    const t = x / (w0 - 1);
+    const fft = Math.floor(255 * Math.pow(1.0 - t, 1.8));
+    const wave = Math.floor(128 + 127 * Math.sin(t * Math.PI * 10.0));
+    // row0: fft, row1: waveform
+    const i0 = (x + 0 * w0) * 4;
+    const i1 = (x + 1 * w0) * 4;
+    d0[i0] = fft; d0[i0 + 1] = fft; d0[i0 + 2] = fft; d0[i0 + 3] = 255;
+    d0[i1] = wave; d0[i1 + 1] = wave; d0[i1 + 2] = wave; d0[i1 + 3] = 255;
+  }
+
+  // iChannel1/2/3: tiling noise/grain-like textures (smaller in grid previews).
+  const size = noiseSize;
+  const makeNoise = (scaleA, scaleB) => {
+    const d = new Uint8Array(size * size * 4);
+    for (let y = 0; y < size; y++) {
+      for (let x = 0; x < size; x++) {
+        const i = (y * size + x) * 4;
+        const n = Math.floor(
+          127 +
+            127 *
+              Math.sin((x * scaleA + y * scaleB) * 0.11) *
+              Math.cos((x * scaleB - y * scaleA) * 0.07)
+        );
+        d[i] = n;
+        d[i + 1] = (n * 37) & 255;
+        d[i + 2] = (n * 73) & 255;
+        d[i + 3] = 255;
+      }
+    }
+    return d;
+  };
+
+  return [
+    createTexture(gl, w0, h0, d0),
+    createTexture(gl, size, size, makeNoise(1.0, 0.7)),
+    createTexture(gl, size, size, makeNoise(0.8, 1.3)),
+    createTexture(gl, size, size, makeNoise(1.7, 0.4)),
+  ];
+}
+
+function bindChannelTextures(gl, channelUniformLocs, channelTextures) {
+  for (let i = 0; i < 4; i++) {
+    if (channelUniformLocs[i] == null) continue;
+    gl.activeTexture(gl.TEXTURE0 + i);
+    gl.bindTexture(gl.TEXTURE_2D, channelTextures[i]);
+    gl.uniform1i(channelUniformLocs[i], i);
+  }
+  gl.activeTexture(gl.TEXTURE0);
+}
+
+function computePreviewBufferSize(cssW, cssH) {
+  const dpr = Math.min(window.devicePixelRatio || 1, PREVIEW_MAX_PIXEL_RATIO);
+  let w = Math.max(1, Math.floor(cssW * dpr));
+  let h = Math.max(1, Math.floor(cssH * dpr));
+  const long = Math.max(w, h);
+  if (long > PREVIEW_MAX_BUFFER_LONG_SIDE) {
+    const s = PREVIEW_MAX_BUFFER_LONG_SIDE / long;
+    w = Math.max(1, Math.floor(w * s));
+    h = Math.max(1, Math.floor(h * s));
+  }
+  return { w, h };
+}
+
+function computeDetailBufferSize(cssW, cssH) {
+  const dpr = Math.min(window.devicePixelRatio || 1, DETAIL_MAX_PIXEL_RATIO);
+  let w = Math.max(1, Math.floor(cssW * dpr));
+  let h = Math.max(1, Math.floor(cssH * dpr));
+  const long = Math.max(w, h);
+  if (long > DETAIL_MAX_BUFFER_LONG_SIDE) {
+    const s = DETAIL_MAX_BUFFER_LONG_SIDE / long;
+    w = Math.max(1, Math.floor(w * s));
+    h = Math.max(1, Math.floor(h * s));
+  }
+  return { w, h };
+}
+
+function countGridWebGLContexts() {
+  let n = 0;
+  for (const p of previews) {
+    if (p.gl) n += 1;
+  }
+  return n;
+}
+
+function tearDownPreviewWebGL(state) {
+  if (state._tearDownTimer) {
+    clearTimeout(state._tearDownTimer);
+    state._tearDownTimer = null;
+  }
+  state._staticRendered = false;
+  state._staticDirty = true;
+  if (!state.gl) return;
+  const gl = state.gl;
+  try {
+    if (state.program) gl.deleteProgram(state.program);
+    if (state.vao) gl.deleteVertexArray(state.vao);
+    if (state.vbo) gl.deleteBuffer(state.vbo);
+    if (state.channelTextures) state.channelTextures.forEach((t) => gl.deleteTexture(t));
+  } catch (_) {
+    /* context may already be lost */
+  }
+  const ext = gl.getExtension("WEBGL_lose_context");
+  if (ext) ext.loseContext();
+  state.gl = null;
+  state.program = null;
+  state.vao = null;
+  state.vbo = null;
+  state.channelTextures = null;
+  state.channelUniforms = null;
+  state.uniforms = null;
+}
+
+/** Only evict GPU for cards that are not visible / filtered out — avoids thrash when many cards are on-screen. */
+function evictOffscreenGridWebGLContext() {
+  const off = previews.filter((p) => p.gl && (!p.visible || p.card.style.display === "none"));
+  if (!off.length) return false;
+  off.sort((a, b) => (a._glTouchSeq || 0) - (b._glTouchSeq || 0));
+  tearDownPreviewWebGL(off[0]);
+  return true;
+}
+
+function ensurePreviewWebGL(state) {
+  if (state.gl || state.compileFailed) return;
+  const errorEl = state.card.querySelector(".error");
+  while (countGridWebGLContexts() >= MAX_GRID_WEBGL_CONTEXTS) {
+    if (!evictOffscreenGridWebGLContext()) break;
+  }
+  if (countGridWebGLContexts() >= MAX_GRID_WEBGL_CONTEXTS) {
+    return;
+  }
+  const gl = state.canvas.getContext("webgl2", GL_CONTEXT_OPTS);
+  if (!gl) {
+    errorEl.textContent = "当前浏览器不支持 WebGL2";
+    state.compileFailed = true;
+    return;
+  }
+  let program;
+  let codeForRender = state.code;
+  try {
+    program = compileProgram(gl, buildFragmentShader(codeForRender));
+    errorEl.textContent = "";
+  } catch (_err1) {
+    try {
+      codeForRender = toPortableGlsl(state.code);
+      program = compileProgram(gl, buildFragmentShader(codeForRender));
+      errorEl.textContent = "";
+    } catch (_err2) {
+      codeForRender = fallbackShader(state.name);
+      try {
+        program = compileProgram(gl, buildFragmentShader(codeForRender));
+        errorEl.textContent = "";
+      } catch (err3) {
+        errorEl.textContent = `编译失败:\n${String(err3.message || err3)}`;
+        state.compileFailed = true;
+        const ext = gl.getExtension("WEBGL_lose_context");
+        if (ext) ext.loseContext();
+        return;
+      }
+    }
+  }
+  state.codeForRender = codeForRender;
+  const { vao, vbo } = createQuad(gl);
+  const channelTextures = createDefaultChannelTextures(gl, 128);
+  const channelUniforms = [
+    gl.getUniformLocation(program, "iChannel0"),
+    gl.getUniformLocation(program, "iChannel1"),
+    gl.getUniformLocation(program, "iChannel2"),
+    gl.getUniformLocation(program, "iChannel3"),
+  ];
+  const uniforms = {
+    iResolution: gl.getUniformLocation(program, "iResolution"),
+    iTime: gl.getUniformLocation(program, "iTime"),
+    iTimeDelta: gl.getUniformLocation(program, "iTimeDelta"),
+    iFrame: gl.getUniformLocation(program, "iFrame"),
+    iMouse: gl.getUniformLocation(program, "iMouse"),
+  };
+  state.gl = gl;
+  state.program = program;
+  state.vao = vao;
+  state.vbo = vbo;
+  state.channelTextures = channelTextures;
+  state.channelUniforms = channelUniforms;
+  state.uniforms = uniforms;
+  state._glTouchSeq = ++gridGlTouchCounter;
+  state._staticDirty = true;
+}
+
 const previews = [];
+/** Driven by scheduleRender(); only runs while detail / hover / pending static thumbs need a frame. */
+let renderRafId = 0;
+
+function scheduleRender() {
+  if (renderRafId) return;
+  renderRafId = requestAnimationFrame((ts) => {
+    renderRafId = 0;
+    renderAll(ts);
+  });
+}
+
+function shouldKeepAnimatingGrid() {
+  for (const p of previews) {
+    if (p.card.style.display === "none") continue;
+    if (!p.visible) continue;
+    if (p.isPointerOver) return true;
+  }
+  return false;
+}
+
+function needsStaticThumbnailPass() {
+  for (const p of previews) {
+    if (p.card.style.display === "none") continue;
+    if (!p.visible) continue;
+    if (p.isPointerOver) continue;
+    if (p.compileFailed) continue;
+    if (p._staticRendered && !p._staticDirty) continue;
+    if (!p.gl && countGridWebGLContexts() >= MAX_GRID_WEBGL_CONTEXTS) continue;
+    return true;
+  }
+  return false;
+}
+
+function shouldScheduleNextFrame() {
+  if (detailRuntime) return true;
+  if (shouldKeepAnimatingGrid()) return true;
+  if (needsStaticThumbnailPass()) return true;
+  return false;
+}
+
 let paused = false;
 let elapsed = 0;
 let frame = 0;
@@ -168,64 +439,57 @@ function createPreviewCard(shader) {
  const canvas = card.querySelector("canvas");
  const errorEl = card.querySelector(".error");
  const pauseLocalBtn = card.querySelector(".pause-local-btn");
-  const gl = canvas.getContext("webgl2", { antialias: false, alpha: false });
-  if (!gl) {
-    errorEl.textContent = "当前浏览器不支持 WebGL2";
-    return;
-  }
-
-  let program;
-  let codeForRender = code;
-  try {
-    program = compileProgram(gl, buildFragmentShader(codeForRender));
-  } catch (_err1) {
-    try {
-      codeForRender = toPortableGlsl(code);
-      program = compileProgram(gl, buildFragmentShader(codeForRender));
-      errorEl.textContent = "";
-    } catch (_err2) {
-      codeForRender = fallbackShader(name);
-      try {
-        program = compileProgram(gl, buildFragmentShader(codeForRender));
-        errorEl.textContent = "";
-      } catch (err3) {
-        errorEl.textContent = `编译失败:\n${String(err3.message || err3)}`;
-        return;
-      }
-    }
-  }
-
-  const { vao } = createQuad(gl);
-  const uniforms = {
-    iResolution: gl.getUniformLocation(program, "iResolution"),
-    iTime: gl.getUniformLocation(program, "iTime"),
-    iTimeDelta: gl.getUniformLocation(program, "iTimeDelta"),
-    iFrame: gl.getUniformLocation(program, "iFrame"),
-    iMouse: gl.getUniformLocation(program, "iMouse"),
-  };

  const state = {
    id,
    name,
    code,
-    codeForRender,
+    codeForRender: code,
+    compileFailed: false,
    card,
    canvas,
-    gl,
-    program,
-    vao,
-    uniforms,
+    gl: null,
+    program: null,
+    vao: null,
+    vbo: null,
+    channelTextures: null,
+    channelUniforms: null,
+    uniforms: null,
    mouse: { x: 0, y: 0, downX: 0, downY: 0, down: false },
    isPlaying: true,
    localTime: 0,
    localFrame: 0,
    lastTick: performance.now(),
+    visible: false,
+    _layoutW: 0,
+    _layoutH: 0,
+    _glTouchSeq: 0,
+    _tearDownTimer: null,
+    isPointerOver: false,
+    _staticRendered: false,
+    _staticDirty: true,
  };

+  card.addEventListener("mouseenter", () => {
+    state.isPointerOver = true;
+    state.lastTick = performance.now();
+    scheduleRender();
+  });
+  card.addEventListener("mouseleave", () => {
+    state.isPointerOver = false;
+    state.localTime = 0;
+    state.localFrame = 0;
+    state._staticDirty = true;
+    state._staticRendered = false;
+    scheduleRender();
+  });
+
  canvas.addEventListener("mousemove", (event) => {
    const rect = canvas.getBoundingClientRect();
-    state.mouse.x = ((event.clientX - rect.left) / rect.width) * canvas.width;
-    state.mouse.y = ((rect.bottom - event.clientY) / rect.height) * canvas.height;
+    const bw = canvas.width || Math.max(1, state._layoutW || rect.width);
+    const bh = canvas.height || Math.max(1, state._layoutH || rect.height);
+    state.mouse.x = ((event.clientX - rect.left) / rect.width) * bw;
+    state.mouse.y = ((rect.bottom - event.clientY) / rect.height) * bh;
  });
  canvas.addEventListener("mousedown", () => {
    state.mouse.down = true;
@@ -241,15 +505,63 @@ function createPreviewCard(shader) {
    state.isPlaying = !state.isPlaying;
    state.lastTick = performance.now();
    pauseLocalBtn.textContent = state.isPlaying ? "暂停" : "继续";
+    scheduleRender();
  });
  canvas.addEventListener("click", () => openDetail(state));

  gridEl.appendChild(card);
+
+  const ro = new ResizeObserver((entries) => {
+    for (const entry of entries) {
+      if (entry.target !== canvas) continue;
+      const cr = entry.contentRect;
+      state._layoutW = cr.width;
+      state._layoutH = cr.height;
+      state._staticDirty = true;
+      scheduleRender();
+    }
+  });
+  ro.observe(canvas);
+  state._resizeObserver = ro;
+
+  const io = new IntersectionObserver(
+    (entries) => {
+      for (const e of entries) {
+        if (e.target !== canvas) continue;
+        state.visible = e.isIntersecting;
+        if (e.isIntersecting) {
+          if (state._tearDownTimer) {
+            clearTimeout(state._tearDownTimer);
+            state._tearDownTimer = null;
+          }
+          state._staticDirty = true;
+          state._staticRendered = false;
+          ensurePreviewWebGL(state);
+          scheduleRender();
+        } else {
+          if (state._tearDownTimer) clearTimeout(state._tearDownTimer);
+          state._tearDownTimer = setTimeout(() => {
+            state._tearDownTimer = null;
+            if (!state.visible) tearDownPreviewWebGL(state);
+          }, WEBGL_TEARDOWN_DEBOUNCE_MS);
+        }
+      }
+    },
+    { root: null, rootMargin: "120px", threshold: 0.01 }
+  );
+  io.observe(canvas);
+  state._io = io;
+
  previews.push(state);
 }

 function clearPreviews() {
-  previews.forEach((preview) => preview.card.remove());
+  previews.forEach((preview) => {
+    tearDownPreviewWebGL(preview);
+    if (preview._resizeObserver) preview._resizeObserver.disconnect();
+    if (preview._io) preview._io.disconnect();
+    preview.card.remove();
+  });
  previews.length = 0;
 }

@@ -257,16 +569,18 @@ function closeDetail() {
  detailViewEl.classList.remove("active");
  detailViewEl.setAttribute("aria-hidden", "true");
  if (!detailRuntime) return;
-  const { gl, program, vao, vbo } = detailRuntime;
+  const { gl, program, vao, vbo, channelTextures = [], _detailResizeObserver } = detailRuntime;
+  if (_detailResizeObserver) _detailResizeObserver.disconnect();
  gl.deleteProgram(program);
  gl.deleteVertexArray(vao);
  gl.deleteBuffer(vbo);
+  channelTextures.forEach((tex) => gl.deleteTexture(tex));
  detailRuntime = null;
 }

 function openDetail(previewState) {
  closeDetail();
-  const gl = detailCanvas.getContext("webgl2", { antialias: false, alpha: false });
+  const gl = detailCanvas.getContext("webgl2", GL_CONTEXT_OPTS);
  if (!gl) return;
  let program;
  const detailCode = previewState.codeForRender || previewState.code;
@@ -277,11 +591,20 @@ function openDetail(previewState) {
    return;
  }
  const { vao, vbo } = createQuad(gl);
+  const channelTextures = createDefaultChannelTextures(gl, 256);
+  const channelUniforms = [
+    gl.getUniformLocation(program, "iChannel0"),
+    gl.getUniformLocation(program, "iChannel1"),
+    gl.getUniformLocation(program, "iChannel2"),
+    gl.getUniformLocation(program, "iChannel3"),
+  ];
  detailRuntime = {
    gl,
    program,
    vao,
    vbo,
+    channelTextures,
+    channelUniforms,
    uniforms: {
      iResolution: gl.getUniformLocation(program, "iResolution"),
      iTime: gl.getUniformLocation(program, "iTime"),
@@ -290,10 +613,24 @@ function openDetail(previewState) {
      iMouse: gl.getUniformLocation(program, "iMouse"),
    },
    mouse: { x: 0, y: 0, downX: 0, downY: 0, down: false },
+    _layoutW: 0,
+    _layoutH: 0,
  };
+  const dro = new ResizeObserver((entries) => {
+    for (const e of entries) {
+      if (e.target !== detailCanvas) continue;
+      const cr = e.contentRect;
+      detailRuntime._layoutW = cr.width;
+      detailRuntime._layoutH = cr.height;
+    }
+  });
+  dro.observe(detailCanvas);
+  detailRuntime._detailResizeObserver = dro;
+
  detailTitleEl.textContent = previewState.name;
  detailViewEl.classList.add("active");
  detailViewEl.setAttribute("aria-hidden", "false");
+  scheduleRender();
 }

 function applySearch() {
@@ -301,6 +638,7 @@ function applySearch() {
  for (const preview of previews) {
    preview.card.style.display = !keyword || preview.card.dataset.search.includes(keyword) ? "" : "none";
  }
+  scheduleRender();
 }

 async function loadShaders() {
@@ -346,29 +684,63 @@ function renderAll(ts) {
    fpsCounter += 1;
  }

+  const detailOpen = !!detailRuntime;
+
  for (const preview of previews) {
-    const { gl, canvas, program, vao, uniforms, mouse } = preview;
-    const now = performance.now();
-    const localDt = Math.min((now - preview.lastTick) / 1000, 0.05);
-    preview.lastTick = now;
-    if (preview.isPlaying && !paused) {
-      preview.localTime += localDt;
-      preview.localFrame += 1;
+    let localDt = 0;
+    if (!detailOpen) {
+      const now = performance.now();
+      localDt = Math.min((now - preview.lastTick) / 1000, 0.05);
+      preview.lastTick = now;
+      if (preview.isPointerOver && preview.isPlaying && !paused) {
+        preview.localTime += localDt;
+        preview.localFrame += 1;
+      }
    }
-    const rect = canvas.getBoundingClientRect();
-    const dpr = Math.min(window.devicePixelRatio || 1, 2);
-    const w = Math.max(1, Math.floor(rect.width * dpr));
-    const h = Math.max(1, Math.floor(rect.height * dpr));
+
+    if (
+      !detailOpen &&
+      preview.card.style.display !== "none" &&
+      preview.visible &&
+      !preview.gl &&
+      !preview.compileFailed
+    ) {
+      ensurePreviewWebGL(preview);
+    }
+
+    if (detailOpen) continue;
+    if (preview.card.style.display === "none") continue;
+    if (preview.visible === false) continue;
+    if (!preview.gl) continue;
+
+    const isAnim = preview.isPointerOver;
+    if (!isAnim && preview._staticRendered && !preview._staticDirty) continue;
+
+    const { gl, canvas, program, vao, uniforms, mouse, channelTextures, channelUniforms } = preview;
+    if (!preview._layoutW || !preview._layoutH) {
+      const r = canvas.getBoundingClientRect();
+      preview._layoutW = r.width;
+      preview._layoutH = r.height;
+    }
+    const { w, h } = computePreviewBufferSize(preview._layoutW, preview._layoutH);
    if (canvas.width !== w || canvas.height !== h) {
      canvas.width = w;
      canvas.height = h;
      gl.viewport(0, 0, w, h);
+      if (!isAnim) preview._staticDirty = true;
    }
    gl.useProgram(program);
+    bindChannelTextures(gl, channelUniforms, channelTextures);
    gl.uniform3f(uniforms.iResolution, canvas.width, canvas.height, 1);
-    gl.uniform1f(uniforms.iTime, preview.localTime);
-    gl.uniform1f(uniforms.iTimeDelta, preview.isPlaying && !paused ? localDt : 0);
-    gl.uniform1i(uniforms.iFrame, preview.localFrame);
+    if (isAnim) {
+      gl.uniform1f(uniforms.iTime, preview.localTime);
+      gl.uniform1f(uniforms.iTimeDelta, preview.isPlaying && !paused ? localDt : 0);
+      gl.uniform1i(uniforms.iFrame, preview.localFrame);
+    } else {
+      gl.uniform1f(uniforms.iTime, 0);
+      gl.uniform1f(uniforms.iTimeDelta, 0);
+      gl.uniform1i(uniforms.iFrame, 0);
+    }
    gl.uniform4f(
      uniforms.iMouse,
      mouse.x,
@@ -379,19 +751,27 @@ function renderAll(ts) {
    gl.bindVertexArray(vao);
    gl.drawArrays(gl.TRIANGLES, 0, 6);
    gl.bindVertexArray(null);
+    preview._glTouchSeq = ++gridGlTouchCounter;
+    if (!isAnim) {
+      preview._staticRendered = true;
+      preview._staticDirty = false;
+    }
  }

  if (detailRuntime) {
-    const { gl, program, vao, uniforms, mouse } = detailRuntime;
-    const dpr = Math.min(window.devicePixelRatio || 1, 2);
-    const w = Math.max(1, Math.floor(detailCanvas.clientWidth * dpr));
-    const h = Math.max(1, Math.floor(detailCanvas.clientHeight * dpr));
+    const { gl, program, vao, uniforms, mouse, channelTextures, channelUniforms } = detailRuntime;
+    const lw =
+      detailRuntime._layoutW > 0 ? detailRuntime._layoutW : detailCanvas.clientWidth || 1;
+    const lh =
+      detailRuntime._layoutH > 0 ? detailRuntime._layoutH : detailCanvas.clientHeight || 1;
+    const { w, h } = computeDetailBufferSize(lw, lh);
    if (detailCanvas.width !== w || detailCanvas.height !== h) {
      detailCanvas.width = w;
      detailCanvas.height = h;
      gl.viewport(0, 0, w, h);
    }
    gl.useProgram(program);
+    bindChannelTextures(gl, channelUniforms, channelTextures);
    gl.uniform3f(uniforms.iResolution, detailCanvas.width, detailCanvas.height, 1);
    gl.uniform1f(uniforms.iTime, elapsed);
    gl.uniform1f(uniforms.iTimeDelta, dt);
@@ -416,13 +796,14 @@ function renderAll(ts) {
    }
  }

-  requestAnimationFrame(renderAll);
+  if (shouldScheduleNextFrame()) scheduleRender();
 }

 pauseBtn.addEventListener("click", () => {
  paused = !paused;
  pauseBtn.textContent = paused ? "全局继续" : "全局暂停";
  syncStats();
+  scheduleRender();
 });
 resetBtn.addEventListener("click", () => {
  elapsed = 0;
@@ -432,8 +813,12 @@ resetBtn.addEventListener("click", () => {
  detailLastSec = 0;
  detailFpsCounter = 0;
  syncStats();
+  scheduleRender();
+});
+backBtn.addEventListener("click", () => {
+  closeDetail();
+  scheduleRender();
 });
-backBtn.addEventListener("click", closeDetail);
 detailCanvas.addEventListener("mousemove", (event) => {
  if (!detailRuntime) return;
  const rect = detailCanvas.getBoundingClientRect();
@@ -457,4 +842,4 @@ searchInput.addEventListener("input", (event) => {

 loadShaders();
 setInterval(loadShaders, 3000);
-requestAnimationFrame(renderAll);
+scheduleRender();