internal/graphicscommand/command.go
func (c *newScreenFramebufferImageCommand) Exec(indexOffset int) error {
	var err error
	c.result.image, err = theGraphicsDriver.NewScreenFramebufferImage(c.width, c.height)
	return err
}
func (c *newScreenFramebufferImageCommand) Exec(indexOffset int) error {
	var err error
	c.result.image, err = theGraphicsDriver.NewScreenFramebufferImage(c.width, c.height)
	return err
}
// Exec executes a newScreenFramebufferImageCommand.