内存设备环境(memory device context),使用GDI位图对象的时候,需要用到内存设备环境。 通常,设备环境对应于特定的图形输出设备,(例如:视屏显示和打印机)和设备...
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内存设备环境能使系统处理的内存部分,就像虚拟设备一样。
A memory DC enables the system to treat a portion of memory as a virtual device.
当内存设备环境创建后,GDI会自动为它装载一个黑白位图。
When a memory device context is created, GDI automatically selects a 1-by-1 monochrome stock bitmap for it.
由于位图是与设备共存,内存设备环境有些时候被称之为共存设备环境。
Because the bitmap is compatible with the device, a memory DC is also sometimes referred to as a compatible device context.
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