Copies pixel data from slice 0 of a texture to memory.
- iOS 8.0+
- macOS 10.11+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
A pointer to the memory where you want the texture to write its data.
For an ordinary or packed pixel format, the stride, in bytes, between rows of destination data. For a compressed pixel format, the stride is the number of bytes from the beginning of one row of blocks to the beginning of the next.
Specify a nonzero value when you copy pixels from texture types other than
MTLTexture. Specify a value greater than or equal to the width of one row (the size of one pixel, in bytes, multiplied by the pixel width of one row) and less than or equal to
32767multiplied by the size of one pixel. For an ordinary or packed pixel format, use a multiple of the size of one pixel. For a compressed pixel format, use a multiple of the compressed block size. If you specify a nonzero value that is smaller than the width of the texture or is not a multiple of the size of the pixel format or compressed block size, an error occurs.
The location of a block of pixels in the texture slice.
A zero-based value that specifies which mipmap level is the source. If the texture doesn't have mipmaps, use
If the texture is a multisample texture, each sample within a pixel is located consecutively in memory, and the pixels are all treated as part of one row.
If you are a copying a texture in the PVRTC pixel format, you must copy the entire texture.
Don't use this for textures with a private storage mode. To copy data from a private texture, use a
MTLBlit to copy the data from the private texture to another texture that has a non-private storage mode and then copy the data from that texture.