fix: font

pages/make/index.vue

@@ -863,6 +863,9 @@ const saveByCanvas = async (save = true) => {
           });
         };
 
+          // 辅助函数：rpx 转 px (基于预览容器宽度 506rpx 对应 Canvas 540px)
+          const r2p = (rpx) => (rpx * 540) / 506;
+
           try {
             // 1️⃣ 画背景
             // ⭐ 先加载背景图
@@ -874,40 +877,52 @@ const saveByCanvas = async (save = true) => {
 
             ctx.drawImage(bgImg, 0, 0, W, H);
 
-          // 2️⃣ 半透明遮罩（和你 UI 一致）
+            // 2️⃣ 半透明遮罩
             ctx.fillStyle = "rgba(0,0,0,0.08)";
             ctx.fillRect(0, 0, W, H);
 
             // 3️⃣ 标题图片
             if (titleImg) {
-            const titleW = titleImg.width * titleScale.value;
-            const titleH = titleImg.height * titleScale.value;
-            const titleX = (W - titleW) / 2 + titleOffsetX.value;
-            const titleY = 40 + titleOffsetY.value;
-            ctx.drawImage(titleImg, titleX, titleY, titleW, titleH);
+              const previewBaseWidth = 400; // rpx
+              const drawWidth = r2p(previewBaseWidth) * titleScale.value;
+              const drawHeight = (titleImg.height / titleImg.width) * drawWidth;
+              // 预览中是 translate(offsetX, offsetY)，top: 40rpx
+              const titleX = (W - drawWidth) / 2 + r2p(titleOffsetX.value);
+              const titleY = r2p(40 + titleOffsetY.value);
+              ctx.drawImage(titleImg, titleX, titleY, drawWidth, drawHeight);
             }
 
             // 4️⃣ 祝福语气泡
+            // 预览中 .bubble 有 padding: 40rpx，且 .card-overlay 有 padding: 30rpx
+            // 意味着文字距离容器边缘至少有 70rpx
             drawBubbleText(ctx, {
               text: targetName.value + "\n  " + blessingText.value.content,
-            x: 70, 
-            y: 260 + bubbleOffsetY.value,
-            maxWidth: bubbleMaxWidth.value, // 使用动态宽度
-            canvasWidth: W, // 传入画布宽度以实现自动居中
-            fontSize: fontSize.value,
-            lineHeight: fontSize.value * 1.5,
-            backgroundColor: "rgba(255,255,255,0.85)",
+              x: 0, 
+              y: r2p(230 + bubbleOffsetY.value),
+              maxWidth: r2p(bubbleMaxWidth.value), // 预览中 bubble-text 的宽度
+              canvasWidth: W,
+              fontSize: r2p(fontSize.value),
+              lineHeight: r2p(fontSize.value * 1.6), // 预览中是 1.6
+              padding: r2p(40 + 30), // 内部 padding 40 + 容器 padding 30
+              backgroundColor: "transparent",
               textColor: selectedColor.value,
               fontFamily: selectedFont.value.family,
             });
 
+            // 5️⃣ 用户信息
+            // 预览中 user 是 absolute, left: 160 + offsetX, bottom: 40 - offsetY
             drawUserBubble(ctx, {
-            x: 160 + userOffsetX.value,
-            y: H - 136 + userOffsetY.value,
-            avatarImg: avatarImg, // 传入 Image 对象
+              x: r2p(160 + userOffsetX.value),
+              bottom: r2p(40 - userOffsetY.value),
+              canvasHeight: H,
+              avatarImg: avatarImg,
               username: signatureName.value,
               desc: "送上祝福",
               textColor: signatureColor.value,
+              avatarSize: r2p(64),
+              padding: r2p(15),
+              fontSizeName: r2p(24),
+              fontSizeDesc: r2p(20),
             });
 
           // 6️⃣ 输出
@@ -1012,40 +1027,26 @@ function drawBubbleText(ctx, options) {
   });
 
   // 如果提供了 canvasWidth，则自动计算居中的 x 坐标
+  // 预览中文字是左对齐，但整个气泡容器是水平居中的
   let drawX = x;
   if (canvasWidth) {
-    const totalWidth = maxLineWidth + padding * 2;
-    drawX = (canvasWidth - totalWidth) / 2;
+    drawX = (canvasWidth - maxLineWidth) / 2;
   }
 
-  // 2️⃣ 计算气泡尺寸
-  // const bubbleWidth = maxWidth
-
-  // const bubbleHeight = lines.length * lineHeight + padding * 2
-
-  // 3️⃣ 绘制气泡（圆角矩形）
-  // drawRoundRect(
-  //   ctx,
-  //   drawX,
-  //   y,
-  //   bubbleWidth,
-  //   bubbleHeight,
-  //   radius,
-  //   backgroundColor
-  // )
-
   // 4️⃣ 绘制文字
   ctx.fillStyle = textColor;
 
   lines.forEach((line, index) => {
-    ctx.fillText(line, drawX + padding, y + padding + index * lineHeight);
+    ctx.fillText(line, drawX, y + padding + index * lineHeight);
   });
 }
 
 function drawUserBubble(ctx, options) {
   const {
     x = 40, // 气泡起点 x
-    y = 860, // 气泡起点 y
+    y, // 气泡起点 y (如果传了 bottom 则优先计算)
+    bottom, // 距离底部的距离
+    canvasHeight,
     avatarImg, // CanvasImage 对象
     username = "zzc",
     desc = "送上祝福",
@@ -1072,11 +1073,17 @@ function drawUserBubble(ctx, options) {
     Math.max(avatarSize, fontSizeName + fontSizeDesc + 4) + padding * 2;
   const bubbleWidth = avatarSize + padding + textWidth + padding * 2;
 
+  // 计算 y
+  let drawY = y;
+  if (typeof bottom !== "undefined" && canvasHeight) {
+    drawY = canvasHeight - bottom - bubbleHeight;
+  }
+
   // 1️⃣ 绘制气泡（左右半圆）
   drawRoundRect(
     ctx,
     x,
-    y,
+    drawY,
     bubbleWidth,
     bubbleHeight,
     bubbleHeight / 2,
@@ -1085,7 +1092,7 @@ function drawUserBubble(ctx, options) {
 
   // 2️⃣ 绘制头像
   const avatarX = x + padding;
-  const avatarY = y + (bubbleHeight - avatarSize) / 2;
+  const avatarY = drawY + (bubbleHeight - avatarSize) / 2;
 
   ctx.save();
   ctx.beginPath();
@@ -1104,7 +1111,7 @@ function drawUserBubble(ctx, options) {
 
   // 3️⃣ 绘制文字
   const textX = avatarX + avatarSize + padding;
-  const textY = y + padding;
+  const textY = drawY + padding;
   ctx.fillStyle = textColor;
   ctx.font = `${fontSizeName}px 'PingFang SC'`;
   ctx.fillText(username, textX, textY);