// Code generated by wlgen; DO NOT EDIT.
package viewporter

import (
	"fmt"
	wayland "github.com/bnema/purego-libwayland/protocol/wayland"
	"github.com/bnema/purego-libwayland/server"
)

var WpViewporterInterface *server.Interface
var WpViewportInterface *server.Interface

func init() {
	WpViewporterInterface = &server.Interface{Name: "wp_viewporter", Version: 1}
	WpViewportInterface = &server.Interface{Name: "wp_viewport", Version: 1}
	WpViewporterInterface.Requests = []server.Message{
		{Name: "destroy", Signature: "", Types: []*server.Interface{}},
		{Name: "get_viewport", Signature: "no", Types: []*server.Interface{WpViewportInterface, wayland.SurfaceInterface}},
	}
	WpViewporterInterface.Events = []server.Message{}
	WpViewportInterface.Requests = []server.Message{
		{Name: "destroy", Signature: "", Types: []*server.Interface{}},
		{Name: "set_source", Signature: "ffff", Types: []*server.Interface{nil, nil, nil, nil}},
		{Name: "set_destination", Signature: "ii", Types: []*server.Interface{nil, nil}},
	}
	WpViewportInterface.Events = []server.Message{}
	if err := server.NewInterfaces(WpViewporterInterface, WpViewportInterface); err != nil {
		panic(err)
	}
}

// WpViewporter surface cropping and scaling.
type WpViewporter struct{ *server.Resource }

func WrapWpViewporter(r *server.Resource) *WpViewporter {
	if r == nil {
		return nil
	}
	return &WpViewporter{r}
}

const WpViewporterRequestDestroy uint32 = 0
const WpViewporterRequestGetViewport uint32 = 1

// WpViewporterError .
type WpViewporterError uint32

const (
	WpViewporterErrorViewportExists WpViewporterError = 0
)

// WpViewporterHandler handles wp_viewporter requests.
type WpViewporterHandler interface {
	Destroy(self *WpViewporter)
	GetViewport(self *WpViewporter, id uint32, surface *wayland.Surface)
}

func NewWpViewporter(c server.Client, version int32, id uint32, h WpViewporterHandler) (*WpViewporter, error) {
	if h == nil {
		return nil, fmt.Errorf("purego-libwayland: nil handler for wp_viewporter")
	}
	var self *WpViewporter
	r, err := c.CreateResource(WpViewporterInterface, version, id, func(_ *server.Resource, opcode uint32, args []server.Arg) {
		switch opcode {
		case 0:
			h.Destroy(self)
			self.Destroy()
		case 1:
			h.GetViewport(self, args[0].NewID(), wayland.WrapSurface(args[1].Resource()))
		}
	})
	if err != nil {
		return nil, err
	}
	self = WrapWpViewporter(r)
	r.Data = self
	return self, nil
}
func NewWpViewporterGlobal(d *server.Display, version int32, bind server.BindFunc) error {
	return d.CreateGlobal(WpViewporterInterface, version, bind)
}

// WpViewport crop and scale interface to a wl_surface.
type WpViewport struct{ *server.Resource }

func WrapWpViewport(r *server.Resource) *WpViewport {
	if r == nil {
		return nil
	}
	return &WpViewport{r}
}

const WpViewportRequestDestroy uint32 = 0
const WpViewportRequestSetSource uint32 = 1
const WpViewportRequestSetDestination uint32 = 2

// WpViewportError .
type WpViewportError uint32

const (
	WpViewportErrorBadValue    WpViewportError = 0
	WpViewportErrorBadSize     WpViewportError = 1
	WpViewportErrorOutOfBuffer WpViewportError = 2
	WpViewportErrorNoSurface   WpViewportError = 3
)

// WpViewportHandler handles wp_viewport requests.
type WpViewportHandler interface {
	Destroy(self *WpViewport)
	SetSource(self *WpViewport, x server.Fixed, y server.Fixed, width server.Fixed, height server.Fixed)
	SetDestination(self *WpViewport, width int32, height int32)
}

func NewWpViewport(c server.Client, version int32, id uint32, h WpViewportHandler) (*WpViewport, error) {
	if h == nil {
		return nil, fmt.Errorf("purego-libwayland: nil handler for wp_viewport")
	}
	var self *WpViewport
	r, err := c.CreateResource(WpViewportInterface, version, id, func(_ *server.Resource, opcode uint32, args []server.Arg) {
		switch opcode {
		case 0:
			h.Destroy(self)
			self.Destroy()
		case 1:
			h.SetSource(self, args[0].Fixed(), args[1].Fixed(), args[2].Fixed(), args[3].Fixed())
		case 2:
			h.SetDestination(self, args[0].Int(), args[1].Int())
		}
	})
	if err != nil {
		return nil, err
	}
	self = WrapWpViewport(r)
	r.Data = self
	return self, nil
}
func NewWpViewportGlobal(d *server.Display, version int32, bind server.BindFunc) error {
	return d.CreateGlobal(WpViewportInterface, version, bind)
}
func resourceOf(v interface{ GetResource() *server.Resource }) *server.Resource {
	if v == nil {
		return nil
	}
	return v.GetResource()
}
func (self *WpViewporter) GetResource() *server.Resource {
	if self == nil {
		return nil
	}
	return self.Resource
}
func (self *WpViewport) GetResource() *server.Resource {
	if self == nil {
		return nil
	}
	return self.Resource
}