get_data

Description:

public int get_data (PixelFormat format, uint rowstride, uint8[] data)

Copies the pixel data from a cogl texture to system memory.

<note>Don't pass the value of get_rowstride as the rowstride argument, the rowstride should be the rowstride you want for the destination data buffer not the rowstride of the source texture</note>

Parameters:

this	a `CoglTexture` pointer.
format	the PixelFormat to store the texture as.
rowstride	the rowstride of `data` in bytes or pass 0 to calculate from the bytes-per-pixel of `format` multiplied by the this width.
data	memory location to write the this's contents, or null to only query the data size through the return value.

Returns:

the size of the texture data in bytes