我想通过在背景中绘制并扩展第二张图片来在图片周围绘制轮廓,但是我不是很成功,如何绘制规则的笔画?
我绘制的轮廓:“>
我要绘制的轮廓:“>
我的代码;
private Bitmap ContourBitmap() { int strokeWidth = 8; Bitmap originalBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.flower_icon); Bitmap newStrokedBitmap = Bitmap.createBitmap(originalBitmap.getWidth() + 2 * strokeWidth, originalBitmap.getHeight() + 2 * strokeWidth, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(newStrokedBitmap); float scaleX = (originalBitmap.getWidth() + 2.0f * strokeWidth) / originalBitmap.getWidth(); float scaleY = (originalBitmap.getHeight() + 2.0f * strokeWidth) / originalBitmap.getHeight(); Matrix matrix = new Matrix(); matrix.setScale(scaleX, scaleY); canvas.drawBitmap(originalBitmap, matrix, null); canvas.drawColor(Color.WHITE, PorterDuff.Mode.SRC_ATOP); //Color.WHITE is stroke color canvas.drawBitmap(originalBitmap, strokeWidth, strokeWidth, null); }
我想通过在背景中绘制并扩展第二张图片来在图片周围绘制轮廓,但是我不是很成功,如何绘制常规笔画?我绘制的轮廓:...
这是一种策略,我们绘制相同的原始图片,但略有偏移