fix(glass): align frosted fixed and scroll materials (#617)

src/App.vue

@@ -1141,6 +1141,11 @@ onUnmounted(() => {
       <!-- 全局磨砂层 -->
       <div v-if="shouldRenderGlobalBlurLayer" class="global-blur-layer"></div>
     </div>
+    <!-- 页面内容 -->
+    <VApp
+      :class="{ 'app-shell--login-wallpaper': isLoginWallpaperRoute }"
+      :data-login-visual-profile="isLoginWallpaperRoute ? loginVisualProfile : undefined"
+    >
       <GlassOpticalLayer
         v-if="shouldRenderGlassOpticalLayer"
         :appearance="effectiveGlassSettings.glassAppearance"
@@ -1165,11 +1170,6 @@ onUnmounted(() => {
         @wallpaper-preparation-failed="handleOpticalWallpaperPreparationFailed"
         @wallpaper-prepared="handleOpticalWallpaperPrepared"
       />
-    <!-- 页面内容 -->
-    <VApp
-      :class="{ 'app-shell--login-wallpaper': isLoginWallpaperRoute }"
-      :data-login-visual-profile="isLoginWallpaperRoute ? loginVisualProfile : undefined"
-    >
       <RouterView />
       <!-- 全局共享弹窗入口，列表与卡片按需在这里挂载业务弹窗。 -->
       <SharedDialogHost />

src/composables/__tests__/useGlassFixedShellBackplate.spec.ts

@@ -14,13 +14,13 @@ describe('shouldUseGlassFixedShellBackplate', () => {
     themeName: 'glass',
   }
 
-  it('enables the direct wallpaper backplate only for affected authenticated Chromium rendering', () => {
+  it('enables the direct wallpaper backplate for every frosted Chromium quality', () => {
     expect(shouldUseGlassFixedShellBackplate(eligible)).toBe(true)
+    expect(shouldUseGlassFixedShellBackplate({ ...eligible, quality: 'balanced' })).toBe(true)
+    expect(shouldUseGlassFixedShellBackplate({ ...eligible, quality: 'high' })).toBe(true)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, needsStableFixedBackdrop: false })).toBe(false)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, appearance: 'clear' })).toBe(false)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, appearance: 'tinted' })).toBe(false)
-    expect(shouldUseGlassFixedShellBackplate({ ...eligible, quality: 'balanced' })).toBe(false)
-    expect(shouldUseGlassFixedShellBackplate({ ...eligible, quality: 'high' })).toBe(false)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, themeName: 'transparent' })).toBe(false)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, isAuthenticated: false })).toBe(false)
     expect(shouldUseGlassFixedShellBackplate({ ...eligible, hasWallpaper: false })).toBe(false)

src/composables/__tests__/useGlassOpticalRenderer.spec.ts

@@ -456,6 +456,47 @@ describe('glass optical surface discovery', () => {
     ])
   })
 
+  it('keeps frosted fixed surfaces on dynamics-only GPU composition', async () => {
+    const three = await import('three')
+    const render = vi.spyOn(three.WebGLRenderer.prototype, 'render')
+    const canvas = document.createElement('canvas')
+    const appearance = ref<'clear' | 'frosted' | 'tinted'>('clear')
+    appendOpticalSurface('layout-vertical-nav', { height: 800, width: 260, x: 0, y: 0 })
+    const scope = effectScope()
+    const renderer = scope.run(() =>
+      useGlassOpticalRenderer({
+        active: ref(true),
+        appearance,
+        canvas: ref(canvas),
+        quality: ref('balanced'),
+        routeKey: ref('/dashboard'),
+        surfaceSpace: 'fixed',
+        tintColor: ref('#8D51F9'),
+        wallpaperUrl: ref('https://example.com/wallpaper.jpg'),
+      }),
+    )
+
+    await vi.waitFor(() => expect(renderer?.state.value).toBe('ready'))
+    const scene = render.mock.calls.at(-1)?.[0] as unknown as {
+      children: Array<{
+        material: {
+          uniforms: {
+            uDynamicsOnly: { value: number }
+          }
+        }
+      }>
+    }
+    const dynamicsOnly = scene.children[0].material.uniforms.uDynamicsOnly
+    expect(dynamicsOnly.value).toBe(0)
+
+    appearance.value = 'frosted'
+    await vi.waitFor(() => expect(dynamicsOnly.value).toBe(1))
+
+    appearance.value = 'tinted'
+    await vi.waitFor(() => expect(dynamicsOnly.value).toBe(0))
+    scope.stop()
+  })
+
   it('re-samples scroll surfaces and material weight on a shared page motion revision', async () => {
     vi.spyOn(window, 'innerWidth', 'get').mockReturnValue(1200)
     vi.spyOn(window, 'innerHeight', 'get').mockReturnValue(800)

src/composables/useGlassFixedShellBackplate.ts

@@ -56,14 +56,13 @@ export function isChromiumFixedShellBackplateBrowser(browserIdentity: GlassFixed
   return /\b(?:Chrome|Chromium)\/\d+/u.test(browserIdentity.userAgent)
 }
 
-/** 只有需要稳定 fixed 背板的 Chromium 磨砂标准布局使用直接壁纸采样。 */
+/** Chromium 磨砂 fixed 层使用稳定壁纸背板，避免读取随页面重绘的 document backdrop。 */
 export function shouldUseGlassFixedShellBackplate(options: GlassFixedShellBackplateEligibility) {
   return (
     options.isAuthenticated &&
     options.needsStableFixedBackdrop &&
     options.themeName === 'glass' &&
     options.appearance === 'frosted' &&
-    options.quality === 'css' &&
     options.hasWallpaper
   )
 }

src/composables/useGlassOpticalRenderer.ts

@@ -1399,6 +1399,8 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
   let resumePromise: Promise<void> | null = null
   let resumeVersion = 0
   const presentationSpace = options.surfaceSpace ?? 'fixed'
+  const usesDynamicsOnly = () =>
+    presentationSpace === 'scroll' || (presentationSpace === 'fixed' && toValue(options.appearance) === 'frosted')
   const wallpaperSourceCache = options.wallpaperSourceCache ?? createGlassWallpaperSourceCache()
 
   /** 滚动期间由原生 backdrop 接管壁纸；稳定态恢复完整纹理折射与流体反馈。 */
@@ -3664,7 +3666,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
         uBackgroundVisibility: { value: materialResponse.backgroundVisibility },
         uCoverScale: { value: new three.Vector2(1, 1) },
         uDeformationStrength: { value: getDeformationStrengthScale() },
-        uDynamicsOnly: { value: presentationSpace === 'scroll' ? 1 : 0 },
+        uDynamicsOnly: { value: usesDynamicsOnly() ? 1 : 0 },
         uFlowTexture: { value: null },
         uFlowStrength: { value: getFlowStrengthScale() },
         uHasFlowTexture: { value: 0 },
@@ -3818,6 +3820,7 @@ export function useGlassOpticalRenderer(options: UseGlassOpticalRendererOptions)
         )
         resources.uniforms.uAppearance.value = getGlassAppearanceUniformValue(appearance)
         resources.uniforms.uBackgroundVisibility.value = materialResponse.backgroundVisibility
+        resources.uniforms.uDynamicsOnly.value = usesDynamicsOnly() ? 1 : 0
         resources.uniforms.uFrostDetailLevel.value = materialResponse.frostDetailLevel
         resources.uniforms.uSurfaceDensity.value = materialResponse.surfaceDensity
         resources.uniforms.uTintDensity.value = materialResponse.tintDensity

src/styles/__tests__/glassOverlayMaterial.spec.ts

@@ -33,7 +33,7 @@ describe('glass overlay material styles', () => {
     )
   })
 
-  it('keeps frosted CSS fixed shells on the stable wallpaper backplate', () => {
+  it('keeps Chromium frosted fixed shells on the stable wallpaper backplate', () => {
     const styles = readFileSync(resolve(cwd(), 'src/styles/themes/glass.scss'), 'utf8')
     const backplate = readFileSync(resolve(cwd(), 'src/components/theme/GlassFixedShellBackplate.vue'), 'utf8')
 
@@ -41,6 +41,12 @@ describe('glass overlay material styles', () => {
     expect(styles).toMatch(
       /&\[data-glass-appearance='frosted'\]\[data-glass-quality='css'\][\s\S]*?\.layout-wrapper\.layout-fixed-shell-backplate-active \.layout-vertical-nav::before,[\s\S]*?\.layout-wrapper\.layout-fixed-shell-backplate-active \.layout-navbar,[\s\S]*?backdrop-filter:\s*none\s*!important;/,
     )
+    expect(styles).toMatch(
+      /\[data-glass-appearance='frosted'\]\[data-glass-quality='balanced'\]\s*\{[\s\S]*?--glass-fixed-shell-backplate-filter:\s*var\(--glass-native-surface-backdrop-filter\);/,
+    )
+    expect(styles).toMatch(
+      /\[data-glass-appearance='frosted'\]\[data-glass-quality='high'\]\s*\{[\s\S]*?--glass-fixed-shell-backplate-filter:\s*var\(--glass-native-surface-backdrop-filter\);/,
+    )
     expect(backplate).toContain('filter: var(--glass-fixed-shell-backplate-filter)')
     expect(backplate).not.toContain('backdrop-filter')
     expect(backplate).toContain('var(--glass-fixed-shell-nav-inline-size) 100%')
@@ -121,6 +127,9 @@ describe('glass overlay material styles', () => {
     expect(styles).toMatch(
       /\[data-glass-renderer-state='ready'\][\s\S]*?\.app-hover-lift-card:not\(\.media-card--image-loaded\)[\s\S]*?backdrop-filter:\s*var\(--glass-native-surface-backdrop-filter\)\s*!important;/,
     )
+    expect(styles).toMatch(
+      /\.layout-wrapper:not\(\.layout-fixed-shell-backplate-active\) \.layout-vertical-nav::before,[\s\S]*?backdrop-filter:\s*var\(--glass-native-surface-backdrop-filter\)\s*!important;/,
+    )
     expect(styles).toMatch(
       /\.settings-section-card\.app-grouped-list\s*\{[\s\S]*?backdrop-filter:\s*var\(--glass-native-surface-backdrop-filter\)\s*!important;/,
     )

src/styles/themes/glass.scss

@@ -1,6 +1,8 @@
 /* stylelint-disable no-descending-specificity */
 /* stylelint-disable scss/at-rule-no-unknown */
 
+@use '@configured-variables' as variables;
+
 // 材质只覆盖统一表面 token；质量档只替换光学层，不改变业务组件契约。
 html[data-theme='glass'] {
   --glass-surface: rgba(11, 19, 34, calc(0.02 + var(--glass-surface-density, 0.62) * 0.3));
@@ -462,7 +464,7 @@ html[data-theme='glass'] {
     }
   }
 
-  // Chromium 磨砂标准直接渲染稳定壁纸背板，固定功能层不得读取随页面重绘的 document backdrop。
+  // Chromium 磨砂 fixed 层直接渲染稳定壁纸背板，固定功能层不得读取随页面重绘的 document backdrop。
   &[data-glass-appearance='frosted'][data-glass-quality='css'] body[data-theme='glass'] {
     .layout-wrapper.layout-fixed-shell-backplate-active .layout-vertical-nav::before,
     .layout-wrapper.layout-fixed-shell-backplate-active .layout-navbar,
@@ -1193,6 +1195,7 @@ html[data-theme='glass'] {
 
 .glass-optical-layer--fixed {
   position: fixed;
+  z-index: variables.$layout-vertical-nav-layout-navbar-z-index;
 }
 
 // 文档表面与该呈现层共享滚动坐标，canvas backing buffer 仍由 renderer 的质量预算约束。
@@ -1256,6 +1259,12 @@ html[data-glass-appearance='frosted']:is(
     backdrop-filter: none !important;
   }
 
+  .layout-wrapper:not(.layout-fixed-shell-backplate-active) .layout-vertical-nav::before,
+  .layout-wrapper:not(.layout-fixed-shell-backplate-active) .layout-navbar {
+    -webkit-backdrop-filter: var(--glass-native-surface-backdrop-filter) !important;
+    backdrop-filter: var(--glass-native-surface-backdrop-filter) !important;
+  }
+
   .layout-wrapper.window-scrolled.layout-navbar-fixed .layout-navbar,
   .layout-wrapper.layout-horizontal-nav-active.layout-horizontal-nav-scrolled.layout-navbar-fixed .layout-navbar {
     -webkit-backdrop-filter: var(--glass-navbar-scrolled-backdrop-filter) !important;
@@ -1280,12 +1289,14 @@ html[data-glass-appearance='frosted'][data-glass-quality='balanced'] {
   --glass-dashboard-backdrop-filter: var(--glass-native-surface-backdrop-filter);
   --glass-native-surface-backdrop-filter: blur(calc(16px * var(--glass-frost-blur-scale, 1))) saturate(162%)
     brightness(var(--glass-transmission-brightness));
+  --glass-fixed-shell-backplate-filter: var(--glass-native-surface-backdrop-filter);
 }
 
 html[data-glass-appearance='frosted'][data-glass-quality='high'] {
   --glass-dashboard-backdrop-filter: var(--glass-native-surface-backdrop-filter);
   --glass-native-surface-backdrop-filter: blur(calc(10px * var(--glass-frost-blur-scale, 1))) saturate(154%)
     brightness(var(--glass-transmission-brightness));
+  --glass-fixed-shell-backplate-filter: var(--glass-native-surface-backdrop-filter);
 }
 
 // 异步滚动期间只暂停 GPU 动态层；原生壁纸基底不发生材质切换。