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diff --git a/pdf/issue1937/top_caption_rowbreak_p20-2024.pdf b/pdf/issue1937/top_caption_rowbreak_p20-2024.pdf
new file mode 100644
index 0000000000..2c6ffcb103
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diff --git a/rhwp-studio/e2e/MANIFEST.md b/rhwp-studio/e2e/MANIFEST.md
index 9fb15471ba..bc9c3526b3 100644
--- a/rhwp-studio/e2e/MANIFEST.md
+++ b/rhwp-studio/e2e/MANIFEST.md
@@ -91,6 +91,7 @@ e2e 스크립트의 **단일 권위 목록**이다. 파일 추가/변경/폐기
 | `issue-4030-footnote-goto-transition.test.mjs` | 상시 | active | #4030 실제 대형 HWP 각주에서 Option+G 200쪽 이동 시 본문 모드·상태 표시·viewport 전환 | 정책연구용역사업 중간진도보고서(살아있는 간장 기증자의 의학적 선별기준 연구).hwp | 수동 | |
 | `issue-4158-char-overlap-boxed-pua-canvas2d.test.mjs` | 상시 | active | #4158 실제 CharOverlap의 사각 안 숫자 PUA를 Canvas2D가 숫자와 사각형으로 합성 | basic/issue2007_nested_cell_pagination_42065.hwp | npm e2e:issue-4158 | 17쪽·물리 10쪽 raw IR 보존 계약 포함 |
 | `issue-4159-terminal-nested-bottom-border-canvas2d.test.mjs` | 상시 | active | #4159 실제 HWP 물리 3쪽 종료 재귀 중첩 표 bottom 선의 Canvas2D clip 포섭 | basic/issue2007_nested_cell_pagination_42065.hwp | npm e2e:issue-4159 | #4069 17쪽 pagination 계약 포함 |
+| `issue-8125-hairline-canvas2d.test.mjs` | 상시 | active | #8125 장치 한 칸보다 가는 표 괘선을 Canvas2D 가 한 칸 굵기로 그림(Native `subpixel_stroke_hairline` 과 같은 판정) | basic/calendar_year.hwp | npm e2e:issue-8125-canvas2d | run-with-vite.mjs 경유, 수정 전 182곳 미달 |
 | `issue-4252-nested-partial-table-object-selection.test.mjs` | 상시 | active | #4252 재귀 분할 중첩 표의 실제 IR cellPath·bbox 조회·Esc 객체 선택과 브라우저 성능 증적 | basic/issue2007_nested_cell_pagination_42065.hwp | npm e2e:issue-4252 | 물리 5쪽 외부→래퍼→자식 표 경로와 `output/4252/perf-*.json` |
 | `issue-4694-chart-data-edit.test.mjs` | 상시 | active | #4694 차트 데이터 편집 — 메뉴 노출·더블클릭 진입·값 수정 반영·Ctrl+Z 원복·무편집 무흔적 | chart/세로막대형/묶은세로막대형.hwp | 수동 | |
 | `issue-4969-shaping-replay.test.mjs` | 상시 | active | #4969 common GlyphRun의 strict CanvasKit 선택·Source Han exact face·affine advance와 √ratio ink 계약 | RHWPOldHangul-Regular.otf | npm e2e:issue-4969 | software CanvasKit pixel 대조 |
diff --git a/rhwp-studio/e2e/issue-8125-hairline-canvas2d.test.mjs b/rhwp-studio/e2e/issue-8125-hairline-canvas2d.test.mjs
new file mode 100644
index 0000000000..6a41a67ffb
--- /dev/null
+++ b/rhwp-studio/e2e/issue-8125-hairline-canvas2d.test.mjs
@@ -0,0 +1,105 @@
+#!/usr/bin/env node
+
+// #8125 WASM Canvas2D 의 장치 한 칸보다 가는 획은 한 칸 굵기로 그린다.
+//
+// 한컴 Print PDF 를 raster 로 읽으면 0.1 mm(약 0.38 px) 표 괘선도 장치 한 칸을 채운다.
+// Canvas2D 가 선언 굵기(하한 0.5 px)대로 anti-alias 하면 괘선의 덮임이 절반 안팎에 그쳐 옅어진다.
+// Native 검사(tests/cases/native_fractional_glyph_origin.rs `subpixel_stroke_hairline`)와 같은
+// 입력·같은 판정이다: render tree 의 실제 괘선 위치에서 그 괘선을 가로지르는 화소 중 가장 진한
+// 화소가 선 색 대비의 절반 이상인지 본다. 조판 좌표·선언 굵기는 그대로다.
+
+import { mkdirSync, writeFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { assert, runTest, setTestCase, waitForCanvas } from './helpers.mjs';
+
+const E2E_DIR = path.dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = path.resolve(E2E_DIR, '..', '..');
+const FIXTURE = path.join(REPO_ROOT, 'samples', 'basic', 'calendar_year.hwp');
+const OUTPUT_DIR = path.join(REPO_ROOT, 'output', '8125');
+const OUTPUT_PAGE = path.join(OUTPUT_DIR, 'calendar_year_p001_canvas2d.png');
+
+runTest('#8125 장치 한 칸보다 가는 괘선 Canvas2D', async ({ page }) => {
+  setTestCase('calendar_year 1쪽 가는 가로 괘선의 장치 한 칸 덮임');
+  const input = await page.$('#file-input');
+  if (!input) throw new Error('file-input not found');
+  await input.uploadFile(FIXTURE);
+  // 빈 새 문서도 한 쪽이라, 표본의 괘선이 layer tree 에 나타날 때까지 기다린다.
+  await page.waitForFunction(
+    () => window.__wasm?.getSourceFormat?.() === 'hwp' && window.__wasm.pageCount === 1
+      && window.__wasm.doc?.getPageLayerTree(0).includes('"type":"line"'),
+    { timeout: 30000 },
+  );
+  await waitForCanvas(page, 30000);
+
+  const result = await page.evaluate(() => {
+    const doc = window.__wasm?.doc;
+    if (!doc || typeof doc.renderPageToCanvas !== 'function') {
+      throw new Error('WASM Canvas2D renderer not found');
+    }
+
+    const tree = JSON.parse(doc.getPageLayerTree(0));
+    const lines = [];
+    const visit = (value) => {
+      if (!value || typeof value !== 'object') return;
+      if (value.type === 'line') lines.push(value);
+      for (const child of Object.values(value)) visit(child);
+    };
+    visit(tree);
+    const thin = lines.filter((line) => Math.abs(line.y1 - line.y2) < 0.01
+      && Math.abs(line.x2 - line.x1) > 20
+      && line.style.width > 0
+      && line.style.width < 1);
+
+    const canvas = document.createElement('canvas');
+    doc.renderPageToCanvas(0, canvas, 1);
+    const ctx = canvas.getContext('2d', { willReadFrequently: true });
+    const pixels = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
+    // 투명 화소는 흰 종이 위에 합성한 회색으로 읽는다.
+    const ink = (x, y) => {
+      const at = (y * canvas.width + x) * 4;
+      const gray = (pixels[at] + pixels[at + 1] + pixels[at + 2]) / 3;
+      return (255 - gray) * (pixels[at + 3] / 255);
+    };
+
+    const faint = [];
+    let checked = 0;
+    for (const line of thin) {
+      const hex = /^#([0-9a-f]{6})$/i.exec(line.style.color);
+      if (!hex) continue;
+      const value = parseInt(hex[1], 16);
+      const lineGray = (((value >> 16) & 0xff) + ((value >> 8) & 0xff) + (value & 0xff)) / 3;
+      const contrast = 255 - lineGray;
+      if (contrast < 64) continue;
+      checked += 1;
+      // 괘선 양 끝(교차 괘선)을 피해 가운데 세 지점을 본다.
+      for (const t of [0.3, 0.5, 0.7]) {
+        const x = Math.floor(line.x1 + (line.x2 - line.x1) * t);
+        let darkest = 0;
+        for (let y = Math.floor(line.y1 - 2); y <= Math.floor(line.y1 + 2); y += 1) {
+          if (y >= 0 && y < canvas.height) darkest = Math.max(darkest, ink(x, y));
+        }
+        if (darkest < contrast * 0.5) {
+          faint.push([+line.y1.toFixed(1), line.style.width, +(darkest / contrast).toFixed(2)]);
+        }
+      }
+    }
+
+    return {
+      pageDataUrl: canvas.toDataURL('image/png'),
+      thinCount: thin.length,
+      checked,
+      faint,
+    };
+  });
+
+  mkdirSync(OUTPUT_DIR, { recursive: true });
+  writeFileSync(OUTPUT_PAGE, Buffer.from(result.pageDataUrl.split(',')[1], 'base64'));
+
+  assert(result.checked >= 10, `가는 가로 괘선 ${result.checked}/${result.thinCount}개`);
+  assert(
+    result.faint.length === 0,
+    `장치 한 칸을 덮지 못한 괘선 ${result.faint.length}곳 (y, 굵기, 최대 덮임): ${JSON.stringify(result.faint.slice(0, 6))}`,
+  );
+  console.log(`  Evidence: ${OUTPUT_PAGE}`);
+});
diff --git a/rhwp-studio/package.json b/rhwp-studio/package.json
index e532fbc27b..af733b4573 100644
--- a/rhwp-studio/package.json
+++ b/rhwp-studio/package.json
@@ -62,6 +62,7 @@
     "e2e:issue-4121": "node e2e/run-with-vite.mjs -- node e2e/header-footer-selection-issue4121.test.mjs --mode=headless",
     "e2e:issue-2809": "node e2e/issue-2809-split-alignment.test.mjs --mode=headless",
     "e2e:issue-4159": "node e2e/issue-4159-terminal-nested-bottom-border-canvas2d.test.mjs --mode=headless",
+    "e2e:issue-8125-canvas2d": "node e2e/run-with-vite.mjs -- node e2e/issue-8125-hairline-canvas2d.test.mjs --mode=headless",
     "e2e:issue-4252": "node e2e/issue-4252-nested-partial-table-object-selection.test.mjs --mode=headless",
     "e2e:issue-4272": "node e2e/issue-4272-nested-cell-text-selection.test.mjs --mode=headless",
     "e2e:issue-4272-page11": "node e2e/issue-4272-page11-nested-cell-copy.test.mjs --mode=headless",
diff --git a/rhwp-studio/src/view/canvaskit-renderer.ts b/rhwp-studio/src/view/canvaskit-renderer.ts
index 7a8c2e14e1..7a3596e933 100644
--- a/rhwp-studio/src/view/canvaskit-renderer.ts
+++ b/rhwp-studio/src/view/canvaskit-renderer.ts
@@ -463,6 +463,8 @@ export class CanvasKitLayerRenderer {
   private currentShowParagraphMarks = false;
   private currentShowControlCodes = false;
   private currentClipEnabled = true;
+  // Page-space length of one device pixel at the current scale; the floor for shape/line strokes (#8125).
+  private currentDeviceStrokeFloor = 0;
   private currentReplayFeatureCounts: CanvasKitReplayFeatureCounts = {
     dashedStrokes: 0,
     glyphRuns: 0,
@@ -1013,8 +1015,10 @@ export class CanvasKitLayerRenderer {
       this.selectedTextVariantOps = new WeakSet<LayerPaintOp>();
       this.selectTextVariants(tree.root, canvas);
       this.currentTreeFingerprint = replayFingerprint(tree);
+      this.currentDeviceStrokeFloor = Number.isFinite(scale) && scale > 0 ? 1 / scale : 0;
+      // The stroke floor follows the scale, so static pictures are recorded per scale.
       this.currentPictureContext = this.currentTreeFingerprint
-        ? `${this.currentTreeFingerprint}:${this.documentGeneration}:${this.localFontRevision}:${this.imageResourceRevision}:${JSON.stringify(this.glyphRunFonts.diagnostics())}`
+        ? `${this.currentTreeFingerprint}:${scale}:${this.documentGeneration}:${this.localFontRevision}:${this.imageResourceRevision}:${JSON.stringify(this.glyphRunFonts.diagnostics())}`
         : null;
       if (this.currentTreeFingerprint) {
         const fingerprints = this.treeFingerprints.get(inputTree as PageLayerTree) ?? new Set<string>();
@@ -1071,6 +1075,7 @@ export class CanvasKitLayerRenderer {
     } finally {
       this.currentTreeFingerprint = null;
       this.currentPictureContext = null;
+      this.currentDeviceStrokeFloor = 0;
       this.currentPageExtent = null;
       this.currentOp = null;
       this.currentProfile = 'screen';
@@ -5039,7 +5044,7 @@ export class CanvasKitLayerRenderer {
       draw(shadowPaint);
       shadowPaint.delete?.();
       if (style?.strokeColor && (style.strokeWidth ?? 0) > 0) {
-        const shadowStroke = this.makeStrokePaint(shadow.color, style.strokeWidth ?? 1, shadow.opacity);
+        const shadowStroke = this.makeStrokePaint(shadow.color, this.deviceStrokeWidth(style.strokeWidth ?? 1), shadow.opacity);
         try {
           this.drawStrokeWithDash(style.strokeDash, shadowStroke, () => draw(shadowStroke));
         } finally {
@@ -5066,7 +5071,7 @@ export class CanvasKitLayerRenderer {
       paint.delete?.();
     }
     if (style?.strokeColor && (style.strokeWidth ?? 0) > 0) {
-      const paint = this.makeStrokePaint(style.strokeColor, style.strokeWidth ?? 1, style.opacity);
+      const paint = this.makeStrokePaint(style.strokeColor, this.deviceStrokeWidth(style.strokeWidth ?? 1), style.opacity);
       try {
         this.drawStrokeWithDash(style.strokeDash, paint, () => draw(paint));
       } finally {
@@ -5244,7 +5249,7 @@ export class CanvasKitLayerRenderer {
     const nx = lineLen > 0 ? -dy / lineLen : 0;
     const ny = lineLen > 0 ? dx / lineLen : 1;
     for (const [widthRatio, offsetRatio] of this.compoundLineSegments(style.lineType)) {
-      const paint = this.makeStrokePaint(color, Math.max(0.3, width * widthRatio), opacity);
+      const paint = this.makeStrokePaint(color, this.deviceStrokeWidth(Math.max(0.3, width * widthRatio)), opacity);
       const ox = nx * width * offsetRatio;
       const oy = ny * width * offsetRatio;
       try {
@@ -5592,6 +5597,16 @@ export class CanvasKitLayerRenderer {
     return paint;
   }
 
+  /**
+   * Shape and line strokes thinner than one device pixel are drawn one pixel wide (#8125).
+   * A Hancom print raster fills a whole device pixel even for 0.1 mm table rules; anti-aliasing
+   * the declared width leaves them faint. Same rule as Canvas2D `floor_line_width_to_device`
+   * and Native Skia.
+   */
+  private deviceStrokeWidth(width: number): number {
+    return Math.max(width, this.currentDeviceStrokeFloor);
+  }
+
   private makeStrokePaint(color: string, width: number, opacity = 1): SkPaint {
     const paint = new this.canvasKit.Paint();
     paint.setAntiAlias?.(true);
diff --git a/samples/issue1937/top_caption_rowbreak_p20.hwp b/samples/issue1937/top_caption_rowbreak_p20.hwp
new file mode 100644
index 0000000000..8c497ad123
Binary files /dev/null and b/samples/issue1937/top_caption_rowbreak_p20.hwp differ
diff --git a/src/renderer/skia/line_replay.rs b/src/renderer/skia/line_replay.rs
index 82dc9c855b..a1a50e6c55 100644
--- a/src/renderer/skia/line_replay.rs
+++ b/src/renderer/skia/line_replay.rs
@@ -4,7 +4,33 @@ use crate::renderer::render_tree::LineNode;
 use crate::renderer::LineRenderType;
 use skia_safe::{Canvas, Paint};
 
-pub(super) fn draw_line(canvas: &Canvas, line: &LineNode, paint: &Paint, antialias: bool) {
+/// 현재 canvas 변환에서 장치 한 칸에 해당하는 local 길이. 벡터 출력이거나 변환이 퇴화하면 `None`.
+fn raster_device_unit(canvas: &Canvas, raster_target: bool) -> Option<f32> {
+    if !raster_target {
+        return None;
+    }
+    let inverse = canvas.local_to_device_as_3x3().invert()?;
+    let x_unit = inverse.map_vector((1.0, 0.0)).length();
+    let y_unit = inverse.map_vector((0.0, 1.0)).length();
+    let device_unit = x_unit.min(y_unit);
+    (device_unit.is_finite() && device_unit > 0.0).then_some(device_unit)
+}
+
+/// raster 출력의 획은 장치 한 칸보다 가늘게 그리지 않는다(PDF raster 의 얇은 선 규칙).
+/// 조판 좌표·선언 굵기·점선 간격은 바꾸지 않고 현재 장치 변환만 사용한다.
+pub(super) fn floor_stroke_to_device(canvas: &Canvas, paint: &mut Paint, raster_target: bool) {
+    if let Some(device_unit) = raster_device_unit(canvas, raster_target) {
+        paint.set_stroke_width(paint.stroke_width().max(device_unit));
+    }
+}
+
+pub(super) fn draw_line(
+    canvas: &Canvas,
+    line: &LineNode,
+    paint: &Paint,
+    antialias: bool,
+    raster_target: bool,
+) {
     let (x1, y1, x2, y2) = (line.x1, line.y1, line.x2, line.y2);
     let width = line.style.width.max(0.5);
     let segments: &[(f64, f64)] = match line.style.line_type {
@@ -26,6 +52,7 @@ pub(super) fn draw_line(canvas: &Canvas, line: &LineNode, paint: &Paint, antiali
             let mut segment = paint.clone();
             segment.set_anti_alias(antialias);
             segment.set_stroke_width((width * width_ratio).max(0.3) as f32);
+            floor_stroke_to_device(canvas, &mut segment, raster_target);
             let offset = width * offset_ratio;
             let (ox, oy) = (-dy / length * offset, dx / length * offset);
             canvas.draw_line(
diff --git a/src/renderer/skia/renderer.rs b/src/renderer/skia/renderer.rs
index b31f335246..8c15c61222 100644
--- a/src/renderer/skia/renderer.rs
+++ b/src/renderer/skia/renderer.rs
@@ -49,7 +49,7 @@ use super::glyph_replay::{
 };
 use super::image_cache::ImageResourceCache;
 use super::image_conv::{draw_image_bytes, draw_svg_fragment};
-use super::line_replay::draw_line;
+use super::line_replay::{draw_line, floor_stroke_to_device};
 use super::text_replay::SkiaTextReplay;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
@@ -1062,6 +1062,7 @@ impl SkiaLayerRenderer {
         let active_layer = node.layer.or(inherited_layer);
         let clip_enabled = output_options.clip_enabled;
         let antialias = cache_context.policy.antialias();
+        let raster_target = cache_context.raster_target;
         let apply_dash = |paint: &mut Paint, dash: StrokeDash| {
             let mut intervals = dash.intervals(f64::from(paint.stroke_width()));
             // 기존 범용 Skia 패턴은 종전 선 굵기 배율을 유지한다.
@@ -1094,6 +1095,7 @@ impl SkiaLayerRenderer {
             });
             paint.set_color(colorref_to_skia(style.stroke_color?, style.opacity as f32));
             apply_dash(&mut paint, style.stroke_dash);
+            floor_stroke_to_device(canvas, &mut paint, raster_target);
             Some(paint)
         };
         let make_line_paint = |style: &LineStyle| {
@@ -1111,6 +1113,7 @@ impl SkiaLayerRenderer {
                 let intervals = intervals.iter().map(|v| *v as f32).collect::<Vec<_>>();
                 paint.set_path_effect(PathEffect::dash(&intervals, 0.0));
             }
+            floor_stroke_to_device(canvas, &mut paint, raster_target);
             paint
         };
         let draw_placeholder = |bbox: crate::renderer::render_tree::BoundingBox, label: &str| {
@@ -1668,6 +1671,7 @@ impl SkiaLayerRenderer {
                                 } else {
                                     1.0
                                 });
+                                floor_stroke_to_device(canvas, &mut paint, raster_target);
                                 paint.set_color(colorref_to_skia(color, 1.0));
                                 canvas.draw_rect(rect, &paint);
                             }
@@ -1801,7 +1805,13 @@ impl SkiaLayerRenderer {
                             if line.transform.has_transform() {
                                 open_shape_transform(line.transform, bbox);
                             }
-                            draw_line(canvas, line, &make_line_paint(&line.style), antialias);
+                            draw_line(
+                                canvas,
+                                line,
+                                &make_line_paint(&line.style),
+                                antialias,
+                                raster_target,
+                            );
                             draw_arrow_heads(
                                 canvas,
                                 &crate::renderer::arrow::line_heads(
diff --git a/src/renderer/skia/synthetic_typeface.rs b/src/renderer/skia/synthetic_typeface.rs
index 4ecdf1a554..844f152fdc 100644
--- a/src/renderer/skia/synthetic_typeface.rs
+++ b/src/renderer/skia/synthetic_typeface.rs
@@ -1,3 +1,4 @@
+use super::line_replay::floor_stroke_to_device;
 use skia_safe::{
     font_arguments::VariationPosition, Canvas, Data, Font, FontArguments, FontMgr, Paint, Point,
     Typeface,
@@ -42,14 +43,7 @@ pub(super) fn draw_synthetic_bold_paths(
         stroke.set_style(skia_safe::paint::Style::Stroke);
         // PDF의 얇은 획은 raster 장치의 한 단위보다 작게 소비하지 않는다.
         // 조판 좌표나 원래 em 획은 바꾸지 않고 현재 장치 변환만 사용한다.
-        if let Some(inverse) = canvas.local_to_device_as_3x3().invert() {
-            let x_unit = inverse.map_vector((1.0, 0.0)).length();
-            let y_unit = inverse.map_vector((0.0, 1.0)).length();
-            let device_unit = x_unit.min(y_unit);
-            if device_unit.is_finite() && device_unit > 0.0 {
-                stroke.set_stroke_width(stroke.stroke_width().max(device_unit));
-            }
-        }
+        floor_stroke_to_device(canvas, &mut stroke, true);
         (fill, stroke)
     });
     for (path, position) in paths.iter().zip(positions) {
diff --git a/src/renderer/typeset/table/continuation/fragment/emit.rs b/src/renderer/typeset/table/continuation/fragment/emit.rs
index 5ce4eeeb08..577ca08349 100644
--- a/src/renderer/typeset/table/continuation/fragment/emit.rs
+++ b/src/renderer/typeset/table/continuation/fragment/emit.rs
@@ -665,8 +665,11 @@ impl TypesetEngine {
         {
             // 유효성이 확인된 첫 개체 상자는 원점과 사용하지 않은 띠를 함께 소유한다.
             // 표 앞에 제목 줄이 있는 경우에도 같은 소유 관계를 적용한다.
-            let top =
-                st.current_height + caption_extra + host_before_overhead + vert_offset_overhead;
+            // [#7732] 원점은 위 캡션을 포함한 개체 상자의 위끝이다. 예산(`budget.rs` 프레임 =
+            // 하단 − 원점 − 캡션), 확정(`commit_fragment` 의 캡션 + 조각 높이)과 그리기
+            // (`table_partial.rs` 표 = 원점 + 캡션 + 간격)가 모두 캡션을 원점 뒤에 한 번 더한다.
+            // 여기서 캡션을 원점에 넣으면 위 캡션 표가 캡션 높이만큼 내려 그려진다(issue1937 20쪽).
+            let top = st.current_height + host_before_overhead + vert_offset_overhead;
             fragment_placement = Some(crate::renderer::float_placement::ParagraphFloatPlacement {
                 flow: crate::renderer::float_placement::ParagraphFloatFlow::NextLine,
                 anchor_y: st.current_height,
diff --git a/src/renderer/web_canvas.rs b/src/renderer/web_canvas.rs
index e46af679c3..97a6700edb 100644
--- a/src/renderer/web_canvas.rs
+++ b/src/renderer/web_canvas.rs
@@ -1597,6 +1597,25 @@ impl WebCanvasRenderer {
         node.bbox.x < body_left || node.bbox.x + node.bbox.width > body_right
     }
 
+    /// raster canvas 의 획은 장치 한 칸보다 가늘게 그리지 않는다(Native `floor_stroke_to_device` 와
+    /// 같은 PDF raster 의 얇은 선 규칙). 현재 변환의 역으로 장치 한 칸의 local 길이를 구하며,
+    /// 조판 좌표·선언 굵기는 바꾸지 않는다. 점선 간격은 하한 전 굵기로 정한 뒤 호출한다.
+    fn floor_line_width_to_device(&self) {
+        let Ok(matrix) = self.ctx.get_transform() else {
+            return;
+        };
+        let det = (matrix.a() * matrix.d() - matrix.b() * matrix.c()).abs();
+        if !det.is_finite() || det == 0.0 {
+            return;
+        }
+        let x_unit = matrix.d().hypot(matrix.b()) / det;
+        let y_unit = matrix.c().hypot(matrix.a()) / det;
+        let device_unit = x_unit.min(y_unit);
+        if device_unit.is_finite() && device_unit > 0.0 && self.ctx.line_width() < device_unit {
+            self.ctx.set_line_width(device_unit);
+        }
+    }
+
     /// 선 대시 패턴 설정
     fn set_line_dash(&self, dash: &StrokeDash) {
         let pattern = js_sys::Array::new();
@@ -1871,6 +1890,7 @@ impl WebCanvasRenderer {
                 self.ctx
                     .set_line_width(style.stroke_dash.canvas_width(style.stroke_width));
                 self.set_line_dash(&style.stroke_dash);
+                self.floor_line_width_to_device();
                 self.ctx.stroke();
                 let _ = self.ctx.set_line_dash(&js_sys::Array::new());
                 self.ctx.set_line_cap("butt");
@@ -1898,6 +1918,7 @@ impl WebCanvasRenderer {
                 self.ctx
                     .set_line_width(style.stroke_dash.canvas_width(style.stroke_width));
                 self.set_line_dash(&style.stroke_dash);
+                self.floor_line_width_to_device();
                 self.ctx.stroke_rect(x, y, w, h);
                 let _ = self.ctx.set_line_dash(&js_sys::Array::new());
                 self.ctx.set_line_cap("butt");
@@ -1951,6 +1972,7 @@ impl WebCanvasRenderer {
             self.ctx
                 .set_line_width(style.stroke_dash.canvas_width(style.stroke_width));
             self.set_line_dash(&style.stroke_dash);
+            self.floor_line_width_to_device();
             self.ctx.stroke();
             let _ = self.ctx.set_line_dash(&js_sys::Array::new());
             self.ctx.set_line_cap("butt");
@@ -2074,6 +2096,7 @@ impl WebCanvasRenderer {
             self.ctx
                 .set_line_width(style.stroke_dash.canvas_width(style.stroke_width));
             self.set_line_dash(&style.stroke_dash);
+            self.floor_line_width_to_device();
             self.ctx.stroke();
             let _ = self.ctx.set_line_dash(&js_sys::Array::new());
             self.ctx.set_line_cap("butt");
@@ -2742,6 +2765,7 @@ impl Renderer for WebCanvasRenderer {
                     let ox = nx * off;
                     let oy = ny * off;
                     self.ctx.set_line_width(lw);
+                    self.floor_line_width_to_device();
                     self.ctx.begin_path();
                     self.ctx.move_to(lx1 + ox, ly1 + oy);
                     self.ctx.line_to(lx2 + ox, ly2 + oy);
@@ -2751,6 +2775,7 @@ impl Renderer for WebCanvasRenderer {
             _ => {
                 // Single line
                 self.ctx.set_line_width(width);
+                self.floor_line_width_to_device();
                 self.ctx.begin_path();
                 self.ctx.move_to(lx1, ly1);
                 self.ctx.line_to(lx2, ly2);
diff --git a/tests/cases/issue_7732_source_frame_top_caption_origin.rs b/tests/cases/issue_7732_source_frame_top_caption_origin.rs
new file mode 100644
index 0000000000..c12c61ce56
--- /dev/null
+++ b/tests/cases/issue_7732_source_frame_top_caption_origin.rs
@@ -0,0 +1,94 @@
+//! [#7732] 저장 첫 프레임 경로의 위 캡션 표 원점 — 캡션을 원점에 두 번 더하지 않는다.
+//!
+//! 쪽 끝에서 나뉘는 쪽 나눔 표의 첫 조각이 저장 첫 프레임(`stored_complete_extent`·첫 조각 빈 밴드)
+//! 경로로 확정되고 앞선 배치 계획이 없으면, 조판이 원점을 새로 만든다. 예산(프레임 = 하단 − 원점 −
+//! 캡션), 확정(캡션 + 조각 높이)과 그리기(표 = 원점 + 캡션 + 간격)는 모두 원점을 **위 캡션을 포함한
+//! 개체 상자의 위끝**으로 쓴다. 그 원점에 캡션을 넣으면 위 캡션 표가 캡션 높이만큼 내려 그려진다.
+//!
+//! 입력: `samples/issue1937/top_caption_rowbreak_p20.hwp` — 공공 보고서
+//! `samples/issue1937_rowbreak_footnote_overpagination.hwp`(50쪽)의 문단 126–145(18–21쪽)만 남겨
+//! 한/글 2024 로 다시 저장한 5쪽 문서(저장 줄·표 첫 프레임은 한/글이 다시 썼다). 정본은 같은 저장본의
+//! 한/글 2024 Print `pdf/issue1937/top_caption_rowbreak_p20-2024.pdf` 다. 3쪽 끝 표 pi=18 은 위 캡션
+//! «< 부담금 개별법령상 납부의무 완화 규정 종합 >» 을 달고 쪽 끝에서 나뉜다. 정본은 표 위 괘선
+//! 834.1px · 첫 조각 아래 괘선 1005.0px 다. 수정 전 rhwp 는 표를 캡션 높이만큼 내려 위 괘선을
+//! 859.6px 에 그렸다.
+
+#![cfg(not(target_arch = "wasm32"))]
+
+use std::path::Path;
+
+use rhwp::document_core::DocumentCore;
+use rhwp::renderer::render_tree::{RenderNode, RenderNodeType};
+
+const SAMPLE: &str = "samples/issue1937/top_caption_rowbreak_p20.hwp";
+const PAGE: u32 = 2;
+const HOST_PARA: usize = 18;
+const CAPTION: &str = "개별법령상";
+
+fn text(node: &RenderNode) -> String {
+    let mut out = match &node.node_type {
+        RenderNodeType::TextRun(run) => run.display_or_text().to_string(),
+        _ => String::new(),
+    };
+    for child in &node.children {
+        out.push_str(&text(child));
+    }
+    out
+}
+
+fn host_table(node: &RenderNode) -> Option<&RenderNode> {
+    if matches!(&node.node_type, RenderNodeType::Table(t) if t.para_index == Some(HOST_PARA)) {
+        return Some(node);
+    }
+    node.children.iter().find_map(host_table)
+}
+
+/// 표 노드 밖에서 `needle` 을 담은 글줄의 (위, 아래).
+fn line_outside_tables(node: &RenderNode, needle: &str) -> Option<(f64, f64)> {
+    if matches!(node.node_type, RenderNodeType::Table(_)) {
+        return None;
+    }
+    if matches!(node.node_type, RenderNodeType::TextLine(_)) && text(node).contains(needle) {
+        return Some((node.bbox.y, node.bbox.y + node.bbox.height));
+    }
+    node.children
+        .iter()
+        .find_map(|child| line_outside_tables(child, needle))
+}
+
+#[test]
+fn stored_first_frame_top_caption_table_is_drawn_once_below_its_caption() {
+    let path = Path::new(env!("CARGO_MANIFEST_DIR")).join(SAMPLE);
+    let core = DocumentCore::from_bytes(&std::fs::read(&path).expect("read")).expect("parse");
+    assert_eq!(core.page_count(), 5, "한/글 2024 Print 정본 쪽수");
+    let pages = core.dump_page_items_json(None);
+    let body = &pages.as_array().unwrap()[PAGE as usize]["bodyArea"];
+    let body_bottom = body["y"].as_f64().unwrap() + body["height"].as_f64().unwrap();
+
+    let tree = core.build_page_render_tree(PAGE).expect("page 3");
+    let table = host_table(&tree.root).expect("3쪽 표 pi=18 첫 조각");
+    let (table_top, table_bottom) = (table.bbox.y, table.bbox.y + table.bbox.height);
+    let (caption_top, caption_bottom) =
+        line_outside_tables(&tree.root, CAPTION).expect("3쪽 위 캡션 «… 개별법령상 …»");
+
+    // 캡션은 표 바로 위 한 번: 캡션 줄 아래 ≤ 표 위, 그 사이는 캡션 간격 한 칸 안이다.
+    assert!(
+        caption_bottom <= table_top + 0.5 && table_top - caption_bottom <= 12.0,
+        "캡션 줄({caption_top:.1}–{caption_bottom:.1}) 바로 아래에 표({table_top:.1})"
+    );
+    // 첫 조각은 본문 안에 든다.
+    assert!(
+        table_bottom <= body_bottom + 0.5,
+        "표 첫 조각 아래({table_bottom:.1})가 본문 아래({body_bottom:.1}) 안"
+    );
+    // 3쪽은 Visual Sweep 판정값(raw 실루엣) Native 99.90% · fresh WASM 99.87%로 정본과 맞고 직접
+    // 대조했다 — 정본 표 위 괘선 834.1px · 첫 조각 아래 괘선 1005.0px(96dpi)을 ±2px 로 고정한다.
+    assert!(
+        (table_top - 834.1).abs() <= 2.0,
+        "표 위 괘선 {table_top:.1} — 정본 834.1 ±2"
+    );
+    assert!(
+        (table_bottom - 1005.0).abs() <= 2.0,
+        "표 첫 조각 아래 괘선 {table_bottom:.1} — 정본 1005.0 ±2"
+    );
+}
diff --git a/tests/cases/native_fractional_glyph_origin.rs b/tests/cases/native_fractional_glyph_origin.rs
index 6f57063272..f0aee318d5 100644
--- a/tests/cases/native_fractional_glyph_origin.rs
+++ b/tests/cases/native_fractional_glyph_origin.rs
@@ -1,6 +1,7 @@
 #![cfg(feature = "native-skia")]
 
 //! 생성 번호의 소수 원점과 일반 본문의 기존 raster 격자를 함께 보호한다.
+//! 장치 한 칸보다 가는 raster 획의 최소 굵기(#8125)도 같은 Native raster 격자 계약이라 여기서 검사한다.
 
 use rhwp::paint::{LayerNode, PageLayerTree, PaintOp};
 use rhwp::renderer::layer_renderer::RasterRenderOptions;
@@ -97,3 +98,83 @@ fn ordinary_ttf_keeps_existing_raster_baseline_grid() {
     assert!((whole.1 - original.1 - 1.0).abs() <= 0.02);
     assert!((quarter.0 - original.0).abs() <= 0.05);
 }
+
+/// Native raster 의 장치 한 칸보다 가는 획은 한 칸 굵기로 그린다.
+///
+/// 한컴 Print PDF 를 raster 로 읽으면 0.1 mm(약 0.38 px) 표 괘선도 장치 한 칸을 채운다.
+/// Native Skia 가 선언 굵기 그대로 anti-alias 하면 괘선의 덮임이 38% 안팎에 그쳐 거의 보이지
+/// 않는다. `samples/basic/calendar_year.hwp`(한 쪽, 기준 `pdf/basic/calendar_year-2022.pdf`)는
+/// 이 차이로 Native 실루엣이 88.25 였고, 한 칸 굵기로 그리면 98.87(fresh WASM 93.80)이다.
+///
+/// 조판 좌표·선언 굵기는 그대로이고 raster 획 굵기만 바뀌므로, render tree 의 실제 괘선 위치에서
+/// 그 괘선을 가로지르는 화소 중 가장 진한 화소가 선 색 대비의 절반 이상인지 본다.
+mod subpixel_stroke_hairline {
+    use rhwp::document_core::DocumentCore;
+    use rhwp::paint::RenderProfile;
+    use rhwp::renderer::render_tree::{LineNode, RenderNode, RenderNodeType};
+
+    fn thin_horizontal_lines(node: &RenderNode, out: &mut Vec<LineNode>) {
+        if let RenderNodeType::Line(line) = &node.node_type {
+            let horizontal = (line.y1 - line.y2).abs() < 0.01 && (line.x2 - line.x1).abs() > 20.0;
+            if horizontal && line.style.width > 0.0 && line.style.width < 1.0 {
+                out.push(line.clone());
+            }
+        }
+        for child in &node.children {
+            thin_horizontal_lines(child, out);
+        }
+    }
+
+    #[test]
+    fn subpixel_table_rules_cover_one_device_pixel() {
+        let path = std::path::Path::new(env!("CARGO_MANIFEST_DIR"))
+            .join("samples/basic/calendar_year.hwp");
+        let core = DocumentCore::from_bytes(&std::fs::read(path).expect("read")).expect("parse");
+        let tree = core.build_page_render_tree(0).expect("page");
+        let mut lines = Vec::new();
+        thin_horizontal_lines(&tree.root, &mut lines);
+        assert!(lines.len() >= 10, "가는 가로 괘선 — {}개", lines.len());
+
+        let width = tree.root.bbox.width.round() as u32;
+        let pixels = core
+            .render_page_pixels_native_at_width(0, width, RenderProfile::Print, &[])
+            .expect("raster");
+        let scale = f64::from(pixels.width) / tree.root.bbox.width;
+        let gray = |x: i32, y: i32| -> f64 {
+            let at = y as usize * pixels.stride + x as usize * 4;
+            let p = &pixels.bytes[at..at + 3];
+            (f64::from(p[0]) + f64::from(p[1]) + f64::from(p[2])) / 3.0
+        };
+
+        let mut faint = Vec::new();
+        for line in &lines {
+            let color = line.style.color;
+            let ink = (f64::from((color & 0xff) as u8)
+                + f64::from(((color >> 8) & 0xff) as u8)
+                + f64::from(((color >> 16) & 0xff) as u8))
+                / 3.0;
+            let contrast = 255.0 - ink;
+            if contrast < 64.0 {
+                continue;
+            }
+            // 괘선 양 끝(교차 괘선)을 피해 가운데 세 지점을 본다.
+            for t in [0.3, 0.5, 0.7] {
+                let x = ((line.x1 + (line.x2 - line.x1) * t) * scale) as i32;
+                let cy = line.y1 * scale;
+                let darkest = ((cy - 2.0) as i32..=(cy + 2.0) as i32)
+                    .filter(|y| *y >= 0 && *y < pixels.height)
+                    .map(|y| 255.0 - gray(x, y))
+                    .fold(0.0, f64::max);
+                if darkest < contrast * 0.5 {
+                    faint.push((line.y1, line.style.width, darkest / contrast));
+                }
+            }
+        }
+        assert!(
+            faint.is_empty(),
+            "장치 한 칸을 덮지 못한 괘선 {}곳 (y, 굵기, 최대 덮임) — {:?}",
+            faint.len(),
+            &faint[..faint.len().min(6)]
+        );
+    }
+}