DrawView.java 文件源码

@Override
public void onDraw(Canvas canvas) {
    if (mModel == null) {
        return;
    }
    if (!mSetuped) {
        setup();
    }
    if (mOffscreenBitmap == null) {
        return;
    }

    int startIndex = mDrawnLineSize - 1;
    if (startIndex < 0) {
        startIndex = 0;
    }

    DrawRenderer.renderModel(mOffscreenCanvas, mModel, mPaint, startIndex);
    canvas.drawBitmap(mOffscreenBitmap, mMatrix, mPaint);

    mDrawnLineSize = mModel.getLineSize();
}