GL_EXT_copy_image
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_copy_image.txt
GL_EXT_copy_image

	void glCopyImageSubDataEXT (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth)