Fixed font rendering. Added basic button stuff.

Common/Drawable.go

@@ -5,9 +5,9 @@ import "github.com/hajimehoshi/ebiten"
 // Drawable represents an instance that can be drawn
 type Drawable interface {
 	Draw(target *ebiten.Image)
-	GetSize() (uint32, uint32)
+	GetSize() (width, height uint32)
 	MoveTo(x, y int)
-	GetLocation() (int, int)
+	GetLocation() (x, y int)
 	GetVisible() bool
-	SetVisible(bool)
+	SetVisible(visible bool)
 }

Common/Sprite.go

@@ -12,7 +12,7 @@ import (
 type Sprite struct {
 	Directions         uint32
 	FramesPerDirection uint32
-	Frames             []SpriteFrame
+	Frames             []*SpriteFrame
 	X, Y               int
 	Frame, Direction   uint8
 	Blend              bool
@@ -34,6 +34,7 @@ type SpriteFrame struct {
 	Length    uint32
 	ImageData []int16
 	Image     *ebiten.Image
+	Loaded    bool
 }
 
 // CreateSprite creates an instance of a sprite
@@ -57,10 +58,10 @@ func CreateSprite(data []byte, palette Palette) *Sprite {
 		framePointers[i] = binary.LittleEndian.Uint32(data[dataPointer : dataPointer+4])
 		dataPointer += 4
 	}
-	result.Frames = make([]SpriteFrame, totalFrames)
+	result.Frames = make([]*SpriteFrame, totalFrames)
 	for i := uint32(0); i < totalFrames; i++ {
 		dataPointer = framePointers[i]
-
+		result.Frames[i] = &SpriteFrame{}
 		result.Frames[i].Flip = binary.LittleEndian.Uint32(data[dataPointer : dataPointer+4])
 		dataPointer += 4
 		result.Frames[i].Width = binary.LittleEndian.Uint32(data[dataPointer : dataPointer+4])
@@ -120,6 +121,7 @@ func CreateSprite(data []byte, palette Palette) *Sprite {
 				newData[(ii*4)+3] = 0xFF
 			}
 			result.Frames[ix].Image.ReplacePixels(newData)
+			result.Frames[ix].Loaded = true
 		}(i, dataPointer)
 	}
 	return result
@@ -156,11 +158,16 @@ func (v *Sprite) Draw(target *ebiten.Image) {
 		float64((int32(v.Y) - int32(frame.Height) + frame.OffsetY)),
 	)
 	if v.Blend {
-		opts.CompositeMode = ebiten.CompositeModeLighter
+		opts.CompositeMode = ebiten.CompositeModeSourceOver
+	} else {
+		opts.CompositeMode = ebiten.CompositeModeSourceOver
 	}
 	if v.ColorMod != nil {
 		opts.ColorM = ColorToColorM(v.ColorMod)
 	}
+	for frame.Image == nil {
+		time.Sleep(time.Millisecond)
+	}
 	target.DrawImage(frame.Image, opts)
 }
 
@@ -180,10 +187,15 @@ func (v *Sprite) DrawSegments(target *ebiten.Image, xSegments, ySegments, offset
 			)
 			if v.Blend {
 				opts.CompositeMode = ebiten.CompositeModeLighter
+			} else {
+				opts.CompositeMode = ebiten.CompositeModeSourceOver
 			}
 			if v.ColorMod != nil {
 				opts.ColorM = ColorToColorM(v.ColorMod)
 			}
+			for frame.Image == nil {
+				time.Sleep(time.Millisecond)
+			}
 			target.DrawImage(frame.Image, opts)
 			xOffset += int32(frame.Width)
 			biggestYOffset = MaxInt32(biggestYOffset, int32(frame.Height))

Engine.go

@@ -104,8 +104,11 @@ func (v *Engine) mapMpqFiles() {
 	}
 }
 
+var mutex sync.Mutex
+
 // LoadFile loads a file from the specified mpq and returns the data as a byte array
 func (v *Engine) LoadFile(fileName string) []byte {
+	mutex.Lock()
 	// TODO: May want to cache some things if performance becomes an issue
 	mpqFile := v.Files[strings.ToLower(fileName)]
 	mpq, err := MPQ.Load(mpqFile)
@@ -120,7 +123,7 @@ func (v *Engine) LoadFile(fileName string) []byte {
 	mpqStream := MPQ.CreateStream(mpq, blockTableEntry, fileName)
 	result := make([]byte, blockTableEntry.UncompressedFileSize)
 	mpqStream.Read(result, 0, blockTableEntry.UncompressedFileSize)
-
+	mutex.Unlock()
 	return result
 }
 

Scenes/SceneMainMenu.go

@@ -23,6 +23,7 @@ type MainMenu struct {
 	diabloLogoRight     *Common.Sprite
 	diabloLogoLeftBack  *Common.Sprite
 	diabloLogoRightBack *Common.Sprite
+	exitDiabloButton    *UI.Button
 	copyrightLabel      *UI.Label
 	copyrightLabel2     *UI.Label
 	showTrademarkScreen bool
@@ -48,14 +49,14 @@ func (v *MainMenu) Load() []func() {
 			v.copyrightLabel = UI.CreateLabel(v.fileProvider, ResourcePaths.FontFormal12, Palettes.Static)
 			v.copyrightLabel.Alignment = UI.LabelAlignCenter
 			v.copyrightLabel.SetText("Diablo 2 is © Copyright 2000-2016 Blizzard Entertainment")
-			v.copyrightLabel.ColorMod = color.RGBA{188, 168, 140, 255}
+			v.copyrightLabel.Color = color.RGBA{188, 168, 140, 255}
 			v.copyrightLabel.MoveTo(400, 500)
 		},
 		func() {
 			v.copyrightLabel2 = UI.CreateLabel(v.fileProvider, ResourcePaths.FontFormal12, Palettes.Static)
 			v.copyrightLabel2.Alignment = UI.LabelAlignCenter
 			v.copyrightLabel2.SetText("All Rights Reserved.")
-			v.copyrightLabel2.ColorMod = color.RGBA{188, 168, 140, 255}
+			v.copyrightLabel2.Color = color.RGBA{188, 168, 140, 255}
 			v.copyrightLabel2.MoveTo(400, 525)
 		},
 		func() {
@@ -86,6 +87,12 @@ func (v *MainMenu) Load() []func() {
 			v.diabloLogoRightBack = v.fileProvider.LoadSprite(ResourcePaths.Diablo2LogoBlackRight, Palettes.Units)
 			v.diabloLogoRightBack.MoveTo(400, 120)
 		},
+		func() {
+			v.exitDiabloButton = UI.CreateButton(v.fileProvider, "EXIT DIABLO II")
+			v.exitDiabloButton.MoveTo(264, 535)
+			v.exitDiabloButton.SetVisible(false)
+			v.uiManager.AddWidget(v.exitDiabloButton)
+		},
 	}
 }
 
@@ -120,6 +127,7 @@ func (v *MainMenu) Update() {
 		if v.uiManager.CursorButtonPressed(UI.CursorButtonLeft) {
 			v.leftButtonHeld = true
 			v.showTrademarkScreen = false
+			v.exitDiabloButton.SetVisible(true)
 		}
 		return
 	}

UI/Button.go

@@ -1,8 +1,98 @@
 package UI
 
-// Button defines an object that acts like a button
-type Button interface {
-	Widget
-	isPressed() bool
-	setPressed(bool)
+import (
+	"image/color"
+
+	"github.com/essial/OpenDiablo2/Common"
+	"github.com/essial/OpenDiablo2/Palettes"
+	"github.com/essial/OpenDiablo2/ResourcePaths"
+	"github.com/hajimehoshi/ebiten"
+)
+
+// Button defines a standard wide UI button
+type Button struct {
+	enabled       bool
+	x, y          int
+	width, height uint32
+	visible       bool
+	pressed       bool
+	fileProvider  Common.FileProvider
+	normalImage   *ebiten.Image
+	pressedImage  *ebiten.Image
+}
+
+// CreateButton creates an instance of Button
+func CreateButton(fileProvider Common.FileProvider, text string) *Button {
+	result := &Button{
+		fileProvider: fileProvider,
+		width:        272,
+		height:       35,
+		visible:      true,
+		enabled:      true,
+		pressed:      false,
+	}
+	font := GetFont(ResourcePaths.FontExocet10, Palettes.Units, fileProvider)
+	result.normalImage, _ = ebiten.NewImage(272, 35, ebiten.FilterNearest)
+	result.pressedImage, _ = ebiten.NewImage(272, 35, ebiten.FilterNearest)
+	textWidth, textHeight := font.GetTextMetrics(text)
+	textX := (272 / 2) - (textWidth / 2)
+	textY := (35 / 2) - (textHeight / 2) + 5
+	buttonSprite := fileProvider.LoadSprite(ResourcePaths.WideButtonBlank, Palettes.Units)
+	buttonSprite.MoveTo(0, 0)
+	buttonSprite.Blend = true
+	buttonSprite.DrawSegments(result.normalImage, 2, 1, 0)
+	font.Draw(int(textX), int(textY), text, color.RGBA{100, 100, 100, 255}, result.normalImage)
+	buttonSprite.DrawSegments(result.pressedImage, 2, 1, 1)
+	font.Draw(int(textX-2), int(textY+2), text, color.Black, result.pressedImage)
+	return result
+}
+
+// Draw renders the button
+func (v *Button) Draw(target *ebiten.Image) {
+	opts := &ebiten.DrawImageOptions{
+		CompositeMode: ebiten.CompositeModeSourceAtop,
+		Filter:        ebiten.FilterNearest,
+	}
+	opts.GeoM.Translate(float64(v.x), float64(v.y))
+	if v.pressed {
+		target.DrawImage(v.pressedImage, opts)
+		return
+	}
+	target.DrawImage(v.normalImage, opts)
+}
+
+// GetEnabled returns the enabled state
+func (v *Button) GetEnabled() bool {
+	return v.enabled
+}
+
+// SetEnabled sets the enabled state
+func (v *Button) SetEnabled(enabled bool) {
+	v.enabled = enabled
+}
+
+// GetSize returns the size of the button
+func (v *Button) GetSize() (uint32, uint32) {
+	return v.width, v.height
+}
+
+// MoveTo moves the button
+func (v *Button) MoveTo(x, y int) {
+	v.x = x
+	v.y = y
+}
+
+// GetLocation returns the location of the button
+func (v *Button) GetLocation() (x, y int) {
+	return v.x, v.y
+}
+
+// GetVisible returns the visibility of the button
+func (v *Button) GetVisible() bool {
+	return v.visible
+}
+
+// SetVisible sets the visibility of the button
+func (v *Button) SetVisible(visible bool) {
+	v.visible = visible
 }

UI/Font.go

@@ -1,8 +1,11 @@
 package UI
 
 import (
+	"image/color"
+
 	"github.com/essial/OpenDiablo2/Common"
 	"github.com/essial/OpenDiablo2/Palettes"
+	"github.com/hajimehoshi/ebiten"
 )
 
 var fontCache = map[string]*Font{}
@@ -15,8 +18,8 @@ type FontSize struct {
 
 // Font represents a font
 type Font struct {
-	FontSprite *Common.Sprite
-	Metrics    map[uint8]FontSize
+	fontSprite *Common.Sprite
+	metrics    map[uint8]FontSize
 }
 
 // GetFont creates or loads an existing font
@@ -33,9 +36,9 @@ func GetFont(font string, palette Palettes.Palette, fileProvider Common.FileProv
 // CreateFont creates an instance of a MPQ Font
 func CreateFont(font string, palette Palettes.Palette, fileProvider Common.FileProvider) *Font {
 	result := &Font{
-		Metrics: make(map[uint8]FontSize),
+		metrics: make(map[uint8]FontSize),
 	}
-	result.FontSprite = fileProvider.LoadSprite(font+".dc6", palette)
+	result.fontSprite = fileProvider.LoadSprite(font+".dc6", palette)
 	woo := "Woo!\x01"
 	fontData := fileProvider.LoadFile(font + ".tbl")
 	if string(fontData[0:5]) != woo {
@@ -46,7 +49,34 @@ func CreateFont(font string, palette Palettes.Palette, fileProvider Common.FileP
 			Width:  fontData[i+3],
 			Height: fontData[i+4],
 		}
-		result.Metrics[fontData[i+8]] = fontSize
+		result.metrics[fontData[i+8]] = fontSize
 	}
 	return result
 }
+
+// GetTextMetrics returns the size of the specified text
+func (v *Font) GetTextMetrics(text string) (width, height uint32) {
+	width = uint32(0)
+	height = uint32(0)
+	for _, ch := range text {
+		metric := v.metrics[uint8(ch)]
+		width += uint32(metric.Width)
+		height = Common.Max(height, uint32(metric.Height))
+	}
+	return
+}
+
+// Draw draws the font on the target surface
+func (v *Font) Draw(x, y int, text string, color color.Color, target *ebiten.Image) {
+	v.fontSprite.ColorMod = color
+	v.fontSprite.Blend = true
+	_, height := v.GetTextMetrics(text)
+	for _, ch := range text {
+		char := uint8(ch)
+		metric := v.metrics[char]
+		v.fontSprite.Frame = char
+		v.fontSprite.MoveTo(x, y+int(height))
+		v.fontSprite.Draw(target)
+		x += int(metric.Width)
+	}
+}

UI/Manager.go

@@ -19,7 +19,7 @@ const (
 
 // Manager represents the UI manager
 type Manager struct {
-	widgets       []*Widget
+	widgets       []Widget
 	cursorSprite  *Common.Sprite
 	cursorButtons CursorButton
 	CursorX       int
@@ -29,7 +29,7 @@ type Manager struct {
 // CreateManager creates a new instance of a UI manager
 func CreateManager(provider Common.FileProvider) *Manager {
 	result := &Manager{
-		widgets:      make([]*Widget, 0),
+		widgets:      make([]Widget, 0),
 		cursorSprite: provider.LoadSprite(ResourcePaths.CursorDefault, Palettes.Units),
 	}
 	return result
@@ -37,16 +37,23 @@ func CreateManager(provider Common.FileProvider) *Manager {
 
 // Reset resets the state of the UI manager. Typically called for new scenes
 func (v *Manager) Reset() {
-	v.widgets = make([]*Widget, 0)
+	v.widgets = make([]Widget, 0)
 }
 
 // AddWidget adds a widget to the UI manager
-func (v *Manager) AddWidget(widget *Widget) {
+func (v *Manager) AddWidget(widget Widget) {
 	v.widgets = append(v.widgets, widget)
 }
 
 // Draw renders all of the UI elements
 func (v *Manager) Draw(screen *ebiten.Image) {
+	for _, widget := range v.widgets {
+		if !widget.GetVisible() {
+			continue
+		}
+		widget.Draw(screen)
+	}
+
 	cx, cy := ebiten.CursorPosition()
 	v.cursorSprite.MoveTo(cx, cy)
 	v.cursorSprite.Draw(screen)

UI/UILabel.go

@@ -30,14 +30,14 @@ type Label struct {
 	Alignment LabelAlignment
 	font      *Font
 	imageData *ebiten.Image
-	ColorMod  color.Color
+	Color     color.Color
 }
 
 // CreateLabel creates a new instance of a UI label
 func CreateLabel(provider Common.FileProvider, font string, palette Palettes.Palette) *Label {
 	result := &Label{
 		Alignment: LabelAlignLeft,
-		ColorMod:  nil,
+		Color:     color.White,
 		font:      GetFont(font, palette, provider),
 	}
 
@@ -64,17 +64,6 @@ func (v *Label) Draw(target *ebiten.Image) {
 	target.DrawImage(v.imageData, opts)
 }
 
-func (v *Label) calculateSize() (uint32, uint32) {
-	width := uint32(0)
-	height := uint32(0)
-	for _, ch := range v.text {
-		metric := v.font.Metrics[uint8(ch)]
-		width += uint32(metric.Width)
-		height = Common.Max(height, uint32(metric.Height))
-	}
-	return width, height
-}
-
 // MoveTo moves the label to the specified location
 func (v *Label) MoveTo(x, y int) {
 	v.X = x
@@ -85,20 +74,11 @@ func (v *Label) cacheImage() {
 	if v.imageData != nil {
 		return
 	}
-	width, height := v.calculateSize()
+	width, height := v.font.GetTextMetrics(v.text)
 	v.Width = width
 	v.Height = height
 	v.imageData, _ = ebiten.NewImage(int(width), int(height), ebiten.FilterNearest)
-	x := uint32(0)
-	v.font.FontSprite.ColorMod = v.ColorMod
-	for _, ch := range v.text {
-		char := uint8(ch)
-		metric := v.font.Metrics[char]
-		v.font.FontSprite.Frame = char
-		v.font.FontSprite.MoveTo(int(x), int(height))
-		v.font.FontSprite.Draw(v.imageData)
-		x += uint32(metric.Width)
-	}
+	v.font.Draw(0, 0, v.text, v.Color, v.imageData)
 }
 
 // SetText sets the label's text

UI/Widget.go

@@ -7,6 +7,6 @@ import (
 // Widget defines an object that is a UI widget
 type Widget interface {
 	Common.Drawable
-	getEnabled() bool
-	setEnabled(bool)
+	GetEnabled() bool
+	SetEnabled(enabled bool)
 }