修复裁剪窗口画布控件裁剪源问题

- 添加getCanvasBitmap()方法创建包含背景的画布位图
- 裁剪源使用画布位图，与预览显示一致

gallery/build.properties

@@ -1,8 +1,8 @@
 #Created by .winboll/winboll_app_build.gradle
-#Tue Apr 28 09:22:58 CST 2026
+#Tue Apr 28 09:48:58 CST 2026
 stageCount=7
 libraryProject=
 baseVersion=15.0
 publishVersion=15.0.6
-buildCount=23
+buildCount=30
 baseBetaVersion=15.0.7

gallery/src/main/java/cc/winboll/studio/gallery/CropActivity.java

@@ -147,28 +147,31 @@ public class CropActivity extends AppCompatActivity {
         }
         
         try {
+            Bitmap canvasBitmap = cropCanvasView.getCanvasBitmap();
+            if (canvasBitmap == null || canvasBitmap.isRecycled()) {
+                Toast.makeText(this, "Failed to get canvas bitmap", Toast.LENGTH_SHORT).show();
+                return;
+            }
+            
             RectF cropRect = cropCanvasView.getCropRect();
-            RectF imageBounds = cropCanvasView.getImageBounds();
             
-            float cropX = cropRect.left - imageBounds.left;
+            int bmpX = (int) cropRect.left;
-            float cropY = cropRect.top - imageBounds.top;
+            int bmpY = (int) cropRect.top;
-            float cropW = cropRect.width();
+            int bmpW = (int) cropRect.width();
-            float cropH = cropRect.height();
+            int bmpH = (int) cropRect.height();
             
-            int bmpX = (int) cropX;
+            bmpX = Math.max(0, Math.min(bmpX, canvasBitmap.getWidth() - 1));
-            int bmpY = (int) cropY;
+            bmpY = Math.max(0, Math.min(bmpY, canvasBitmap.getHeight() - 1));
-            int bmpW = (int) cropW;
+            bmpW = Math.max(1, Math.min(bmpW, canvasBitmap.getWidth() - bmpX));
-            int bmpH = (int) cropH;
+            bmpH = Math.max(1, Math.min(bmpH, canvasBitmap.getHeight() - bmpY));
-            
-            bmpX = Math.max(0, Math.min(bmpX, originalBitmap.getWidth() - 1));
-            bmpY = Math.max(0, Math.min(bmpY, originalBitmap.getHeight() - 1));
-            bmpW = Math.max(1, Math.min(bmpW, originalBitmap.getWidth() - bmpX));
-            bmpH = Math.max(1, Math.min(bmpH, originalBitmap.getHeight() - bmpY));
             
+            LogUtils.d(TAG, "saveCroppedCover: cropRect=" + cropRect);
             LogUtils.d(TAG, "saveCroppedCover: crop=(" + bmpX + "," + bmpY + "," + bmpW + "," + bmpH + ")");
-            LogUtils.d(TAG, "saveCroppedCover: original size=" + originalBitmap.getWidth() + "x" + originalBitmap.getHeight());
+            LogUtils.d(TAG, "saveCroppedCover: canvas size=" + canvasBitmap.getWidth() + "x" + canvasBitmap.getHeight());
+            
+            Bitmap cropped = Bitmap.createBitmap(canvasBitmap, bmpX, bmpY, bmpW, bmpH);
+            canvasBitmap.recycle();
             
-            Bitmap cropped = Bitmap.createBitmap(originalBitmap, bmpX, bmpY, bmpW, bmpH);
             LogUtils.d(TAG, "saveCroppedCover: cropped size=" + cropped.getWidth() + "x" + cropped.getHeight());
             
             File coverDir = new File(getFilesDir(), "covers");

gallery/src/main/java/cc/winboll/studio/gallery/CropCanvasView.java

@@ -120,6 +120,28 @@ public class CropCanvasView extends View {
         return displayBitmapScale;
     }
     
+    public Bitmap getCanvasBitmap() {
+        if (canvasWidth <= 0 || canvasHeight <= 0) {
+            return null;
+        }
+        Bitmap canvasBmp = Bitmap.createBitmap(canvasWidth, canvasHeight, Bitmap.Config.ARGB_8888);
+        Canvas canvas = new Canvas(canvasBmp);
+        canvas.drawColor(backgroundColor);
+        if (displayBitmap != null && !displayBitmap.isRecycled()) {
+            if (displayBitmap == originalBitmap) {
+                canvas.drawBitmap(displayBitmap, imageBounds.left, imageBounds.top, imagePaint);
+            } else {
+                float invScale = 1f / displayBitmapScale;
+                canvas.save();
+                canvas.scale(invScale, invScale);
+                canvas.drawBitmap(displayBitmap, imageBounds.left * displayBitmapScale, 
+                                  imageBounds.top * displayBitmapScale, imagePaint);
+                canvas.restore();
+            }
+        }
+        return canvasBmp;
+    }
+    
     public void initCanvas(int imgWidth, int imgHeight, float ratio) {
         this.imageWidth = imgWidth;
         this.imageHeight = imgHeight;
@@ -143,7 +165,7 @@ public class CropCanvasView extends View {
         imageBounds.set(left, top, left + imageWidth, top + imageHeight);
         canvasBounds.set(0, 0, canvasWidth, canvasHeight);
         
-        cropRect = new RectF(0, 0, canvasWidth, canvasHeight);
+        cropRect = new RectF(canvasBounds);
         
         requestLayout();
         invalidate();