The height of the region.
The layer index or depth plane of the region. This value is treated as a layer index on 2D array and cube textures, and as a depth plane on 3D textures.
The mip level index of the region.
The texture.
The width of the region.
The left offset of the region.
The top offset of the region.
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A structure specifying a region of a texture used in the blit operation.