从窗体中获取特定大小的矩形
本文关键字：窗体 获取 | 更新日期: 2023-09-27 18:14:22
我可以采取"屏幕截图"从我的形式(backbufferdata)，但它是可能采取只有一部分吗?比方说，如果我的表单是1600x800px，有可能只得到100x100px吗?
int w = GraphicsDevice.PresentationParameters.BackBufferWidth;
int h = GraphicsDevice.PresentationParameters.BackBufferHeight;
//pull the picture from the buffer
int[] backBuffer = new int[w * h];
GraphicsDevice.GetBackBufferData(backBuffer);
//copy into a texture
Texture2D texture = new Texture2D(GraphicsDevice, w, h, true, GraphicsDevice.PresentationParameters.BackBufferFormat);
texture.SetData(backBuffer);
如果我改变宽度和高度，它会给出一个错误"它太小或太大"。
尝试使用GraphicsDevice。GetBackBufferData泛型方法(null, T[]， Int32, Int32)
为例:
int posX = 0; // area position
int posY = 0;
int w = 200; // area size
int h = 100;
//pull the picture from the buffer
int[] backBuffer = new int[w * h];
GraphicsDevice.GetBackBufferData(new Rectangle(posX, posY, w, h), backBuffer, 0, w*h );
//copy into a texture
Texture2D texture = new Texture2D(GraphicsDevice, w, h, true, GraphicsDevice.PresentationParameters.BackBufferFormat);
texture.SetData(backBuffer);