monovania/system/rendermessage.go

168 lines
4.4 KiB
Go

package system
import (
"image"
"image/color"
_ "image/png"
"strings"
"code.rocketnine.space/tslocum/gohan"
"code.rocketnine.space/tslocum/monovania/component"
"code.rocketnine.space/tslocum/monovania/world"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
"golang.org/x/image/colornames"
)
type RenderMessageSystem struct {
player gohan.Entity
op *ebiten.DrawImageOptions
logoImg *ebiten.Image
msgImg *ebiten.Image
tmpImg *ebiten.Image
}
func NewRenderMessageSystem(player gohan.Entity) *RenderMessageSystem {
s := &RenderMessageSystem{
player: player,
op: &ebiten.DrawImageOptions{},
logoImg: ebiten.NewImage(1, 1),
msgImg: ebiten.NewImage(1, 1),
tmpImg: ebiten.NewImage(200, 200),
}
return s
}
func (s *RenderMessageSystem) Needs() []gohan.ComponentID {
return []gohan.ComponentID{
component.PositionComponentID,
component.VelocityComponentID,
component.WeaponComponentID,
}
}
func (s *RenderMessageSystem) Uses() []gohan.ComponentID {
return nil
}
func (s *RenderMessageSystem) Update(_ *gohan.Context) error {
return gohan.ErrSystemWithoutUpdate
}
func (s *RenderMessageSystem) Draw(ctx *gohan.Context, screen *ebiten.Image) error {
if world.World.GameOver {
// Draw game over screen.
if ctx.Entity == world.World.Player {
screen.Fill(colornames.Darkred)
}
return nil
}
if !world.World.MessageVisible {
return nil
}
// Draw message.
if world.World.MessageUpdated {
s.drawMessage()
}
bounds := s.msgImg.Bounds()
x := (float64(world.World.ScreenW) / 2) - (float64(bounds.Dx()) / 2)
y := (float64(world.World.ScreenH) / 2) - float64(bounds.Dy()) - 8
s.op.GeoM.Reset()
s.op.GeoM.Translate(x, y)
screen.DrawImage(s.msgImg, s.op)
// Draw logo.
if !world.World.GameStarted || world.World.FadingIn {
if ctx.Entity == world.World.Player {
var alpha float64
if !world.World.GameStarted {
if world.World.GameStartedTicks <= 144*.5 {
alpha = float64(world.World.GameStartedTicks) / (144 * .5)
} else {
alpha = 1.0
}
} else {
alpha = 1.0 - (float64(world.World.FadeInTicks) / fadeInTime)
}
if alpha > 1 {
alpha = 1
}
s.op.GeoM.Reset()
if !world.World.GameStarted {
s.op.ColorM.ChangeHSV(0, 1, alpha)
} else {
s.op.ColorM.Scale(1, 1, 1, alpha)
}
screen.DrawImage(s.logoImg, s.op)
s.op.ColorM.Reset()
}
}
return nil
}
func (s *RenderMessageSystem) drawMessage() {
message := world.World.MessageText + "\n\n<ENTER> TO CONTINUE."
split := strings.Split(message, "\n")
width := 0
for _, line := range split {
lineSize := len(line) * 12
if lineSize > width {
width = lineSize
}
}
height := len(split) * 32
const padding = 8
width, height = width+padding*2, height+padding*2
s.msgImg = ebiten.NewImage(width, height)
s.msgImg.Fill(color.RGBA{17, 17, 17, 255})
s.tmpImg.Clear()
s.tmpImg = ebiten.NewImage(width*2, height*2)
s.op.GeoM.Reset()
s.op.GeoM.Scale(2, 2)
s.op.GeoM.Translate(float64(padding), float64(padding))
ebitenutil.DebugPrint(s.tmpImg, message)
s.msgImg.DrawImage(s.tmpImg, s.op)
s.op.ColorM.Reset()
}
func (s *RenderMessageSystem) drawLogo() {
s.logoImg = ebiten.NewImage(world.World.ScreenW, world.World.ScreenH)
s.logoImg.Fill(color.Black)
// Draw Ebiten logo.
logoSize := 172
totalSize := int(float64(logoSize) * 2.778)
logoColor := color.RGBA{219, 86, 32, 255}
logoOffset := int(float64(logoSize) * (4.0 / 9.0))
tailWidth := int(float64(logoSize) * (5.0 / 9.0))
x := (world.World.ScreenW / 2) - (totalSize / 2)
y := world.World.ScreenH / 2
for i := 0; i < 3; i++ {
offset := i * logoOffset
s.logoImg.SubImage(image.Rect(x+offset, y-offset, x+logoSize+offset, y+logoSize-offset)).(*ebiten.Image).Fill(logoColor)
}
offset := 4 * logoOffset
s.logoImg.SubImage(image.Rect(x+offset, y-offset, x+tailWidth+offset, y+logoSize-offset)).(*ebiten.Image).Fill(logoColor)
s.logoImg.SubImage(image.Rect(x+offset+logoOffset, y-offset+logoOffset, x+offset+logoSize, y-offset+logoSize)).(*ebiten.Image).Fill(logoColor)
img := ebiten.NewImage(200, 200)
ebitenutil.DebugPrint(img, logoText)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(logoTextScale, logoTextScale)
op.GeoM.Translate(float64(world.World.ScreenW)/2-float64(logoTextWidth)/2, float64(world.World.ScreenH)/2+float64(logoSize))
s.logoImg.DrawImage(img, op)
}
func (s *RenderMessageSystem) SizeUpdated() {
s.drawLogo()
s.drawMessage()
}