Combines the color data for the source and destination bitmaps using the specified mask and rasteroperation.
使用指定的掩码和栅格操作混合源位图和目标位图的颜色数据。
2
If the destination rectangle is smaller than the source rectangle, this function compresses the rows and columns by using the specified rasteroperation.
如果目标矩形小于源矩形，则此函数使用指定的光栅操作压缩的行和列。
3
Rasteroperation codes define how GDI combines colors in output operations that involve a current brush, a possible source bitmap, and a destination bitmap.