Add game/text

example/game/input/input.go

@@ -0,0 +1,53 @@
+// Copyright 2013 Hajime Hoshi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package input
+
+import (
+	"github.com/hajimehoshi/go.ebiten/graphics"
+)
+
+type Input struct {
+}
+
+func New() *Input {
+	return &Input{}
+}
+
+func (game *Input) ScreenWidth() int {
+	return 256
+}
+
+func (game *Input) ScreenHeight() int {
+	return 240
+}
+
+func (game *Input) Fps() int {
+	return 60
+}
+
+func (game *Input) Init(tf graphics.TextureFactory) {
+}
+
+func (game *Input) Update() {
+}
+
+func (game *Input) Draw(g graphics.Context, offscreen graphics.Texture) {
+}

example/game/monochrome/monochrome.go

@@ -55,7 +55,7 @@ func (game *Monochrome) Fps() int {
 }
 
 func (game *Monochrome) Init(tf graphics.TextureFactory) {
-	file, err := os.Open("ebiten.png")
+	file, err := os.Open("images/ebiten.png")
 	if err != nil {
 		panic(err)
 	}

example/game/rotating/rotating.go

@@ -52,7 +52,7 @@ func (game *Rotating) Fps() int {
 }
 
 func (game *Rotating) Init(tf graphics.TextureFactory) {
-	file, err := os.Open("ebiten.png")
+	file, err := os.Open("images/ebiten.png")
 	if err != nil {
 		panic(err)
 	}

example/game/sprites/sprites.go

@@ -100,7 +100,7 @@ func (game *Sprites) Fps() int {
 }
 
 func (game *Sprites) Init(tf graphics.TextureFactory) {
-	file, err := os.Open("ebiten.png")
+	file, err := os.Open("images/ebiten.png")
 	if err != nil {
 		panic(err)
 	}

example/game/text/text.go

@@ -0,0 +1,99 @@
+// Copyright 2013 Hajime Hoshi
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package text
+
+import (
+	"github.com/hajimehoshi/go.ebiten/graphics"
+	"github.com/hajimehoshi/go.ebiten/graphics/matrix"
+	"image"
+	"image/color"
+	"os"
+)
+
+type Text struct {
+	textTexture graphics.Texture
+}
+
+func New() *Text {
+	return &Text{}
+}
+
+func (game *Text) ScreenWidth() int {
+	return 256
+}
+
+func (game *Text) ScreenHeight() int {
+	return 240
+}
+
+func (game *Text) Fps() int {
+	return 60
+}
+
+func (game *Text) Init(tf graphics.TextureFactory) {
+	file, err := os.Open("images/text.png")
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+
+	img, _, err := image.Decode(file)
+	if err != nil {
+		panic(err)
+	}
+	if game.textTexture, err = tf.NewTextureFromImage(img); err != nil {
+		panic(err)
+	}
+}
+
+func (game *Text) Update() {
+}
+
+func (game *Text) Draw(g graphics.Context, offscreen graphics.Texture) {
+	g.Fill(&color.RGBA{R: 128, G: 128, B: 255, A: 255})
+	game.drawText(g, "Hello, World!", 10, 10)
+}
+
+func (game *Text) drawText(g graphics.Context, text string, x, y int) {
+	const letterWidth = 6
+	const letterHeight = 16
+
+	parts := []graphics.TexturePart{}
+	textX := 0
+	for _, c := range text {
+		code := int(c)
+		x := (code % 32) * letterWidth
+		y := (code / 32) * letterHeight
+		source := graphics.Rect{x, y, letterWidth, letterHeight}
+		parts = append(parts, graphics.TexturePart{
+			LocationX: textX,
+			LocationY: 0,
+			Source:    source,
+		})
+		textX += letterWidth
+	}
+
+	geometryMatrix := matrix.IdentityGeometry()
+	geometryMatrix.Translate(float64(x), float64(y))
+	colorMatrix := matrix.IdentityColor()
+	g.DrawTextureParts(game.textTexture.ID, parts,
+		geometryMatrix, colorMatrix)
+}

example/glut/main.go

@@ -26,12 +26,12 @@ package main
 // #include <GLUT/glut.h>
 //
 // void display(void);
-// void mouse(int button, int state, int x, int y);
+// void motion(int x, int y);
 // void idle(void);
 //
 // static void setGlutFuncs(void) {
 //   glutDisplayFunc(display);
-//   glutMouseFunc(mouse);
+//   glutMotionFunc(motion);
 //   glutIdleFunc(idle);
 // }
 //
@@ -39,10 +39,12 @@ import "C"
 import (
 	"github.com/hajimehoshi/go.ebiten"
 	"github.com/hajimehoshi/go.ebiten/example/game/blank"
+	"github.com/hajimehoshi/go.ebiten/example/game/input"
 	"github.com/hajimehoshi/go.ebiten/example/game/monochrome"
 	"github.com/hajimehoshi/go.ebiten/example/game/rects"
 	"github.com/hajimehoshi/go.ebiten/example/game/rotating"
 	"github.com/hajimehoshi/go.ebiten/example/game/sprites"
+	"github.com/hajimehoshi/go.ebiten/example/game/text"
 	"github.com/hajimehoshi/go.ebiten/graphics"
 	"github.com/hajimehoshi/go.ebiten/graphics/opengl"
 	"os"
@@ -51,23 +53,14 @@ import (
 	"unsafe"
 )
 
-type GlutInputEventState int
-
-const (
-	GlutInputEventStateUp GlutInputEventState = iota
-	GlutInputEventStateDown
-)
-
 type GlutInputEvent struct {
-	State GlutInputEventState
-	X     int
-	Y     int
+	X int
+	Y int
 }
 
 type GlutUI struct {
-	screenScale      int
-	glutInputEventCh chan GlutInputEvent
-	updating         chan chan func()
+	glutInputting chan GlutInputEvent
+	updating      chan chan func()
 }
 
 var currentUI *GlutUI
@@ -81,21 +74,11 @@ func display() {
 	C.glutSwapBuffers()
 }
 
-//export mouse
-func mouse(button, glutState, x, y C.int) {
-	var state GlutInputEventState
-	switch glutState {
-	case C.GLUT_UP:
-		state = GlutInputEventStateUp
-	case C.GLUT_DOWN:
-		state = GlutInputEventStateDown
-	default:
-		panic("invalid glutState")
-	}
-	currentUI.glutInputEventCh <- GlutInputEvent{
-		State: state,
-		X:     int(x),
-		Y:     int(y),
+//export motion
+func motion(x, y C.int) {
+	currentUI.glutInputting <- GlutInputEvent{
+		X: int(x),
+		Y: int(y),
 	}
 }
 
@@ -106,9 +89,8 @@ func idle() {
 
 func NewGlutUI(screenWidth, screenHeight, screenScale int) *GlutUI {
 	ui := &GlutUI{
-		screenScale:      screenScale,
-		glutInputEventCh: make(chan GlutInputEvent, 10),
-		updating:         make(chan chan func()),
+		glutInputting: make(chan GlutInputEvent, 10),
+		updating:      make(chan chan func()),
 	}
 
 	cargs := []*C.char{}
@@ -153,6 +135,8 @@ func main() {
 	switch gameName {
 	case "blank":
 		game = blank.New()
+	case "input":
+		game = input.New()
 	case "monochrome":
 		game = monochrome.New()
 	case "rects":
@@ -161,16 +145,19 @@ func main() {
 		game = rotating.New()
 	case "sprites":
 		game = sprites.New()
+	case "text":
+		game = text.New()
 	default:
 		game = rotating.New()
 	}
 
 	const screenScale = 2
-	currentUI = NewGlutUI(game.ScreenWidth(), game.ScreenHeight(),
-		screenScale)
+	screenWidth := game.ScreenWidth()
+	screenHeight := game.ScreenHeight()
+	currentUI = NewGlutUI(screenWidth, screenHeight, screenScale)
 
 	graphicsDevice := opengl.NewDevice(
-		game.ScreenWidth(), game.ScreenHeight(), screenScale,
+		screenWidth, screenHeight, screenScale,
 		currentUI.updating)
 
 	game.Init(graphicsDevice.TextureFactory())
@@ -178,21 +165,25 @@ func main() {
 
 	input := make(chan ebiten.InputState)
 	go func() {
-		ch := currentUI.glutInputEventCh
-		var inputState ebiten.InputState
+		ch := currentUI.glutInputting
 		for {
 			event := <-ch
-			switch event.State {
-			case GlutInputEventStateUp:
-				inputState.IsTapped = false
-				inputState.X = 0
-				inputState.Y = 0
-			case GlutInputEventStateDown:
-				inputState.IsTapped = true
-				inputState.X = event.X
-				inputState.Y = event.Y
+			x := event.X / screenScale
+			y := event.Y / screenScale
+			if x < 0 {
+				x = 0
+			} else if screenWidth <= x {
+				x = screenWidth - 1
+			}
+			if y < 0 {
+				y = 0
+			} else if screenHeight <= y {
+				y = screenHeight - 1
+			}
+			input <- ebiten.InputState{
+				X: x,
+				Y: y,
 			}
-			input <- inputState
 		}
 	}()
 

graphics/graphics.go

@@ -53,7 +53,7 @@ type Context interface {
 		geometryMatrix matrix.Geometry,
 		colorMatrix matrix.Color)
 	DrawTextureParts(textureID TextureID,
-		locations []TexturePart,
+		parts []TexturePart,
 		geometryMatrix matrix.Geometry,
 		colorMatrix matrix.Color)
 	SetOffscreen(textureID TextureID)

graphics/opengl/context.go

@@ -144,7 +144,7 @@ func (context *Context) DrawTexture(
 }
 
 func (context *Context) DrawTextureParts(
-	textureID graphics.TextureID, locations []graphics.TexturePart,
+	textureID graphics.TextureID, parts []graphics.TexturePart,
 	geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
 
 	texture := context.textures[textureID]
@@ -160,11 +160,11 @@ func (context *Context) DrawTextureParts(
 	C.glEnableVertexAttribArray(C.GLuint(vertexAttrLocation))
 	C.glEnableVertexAttribArray(C.GLuint(textureAttrLocation))
 	// TODO: Refactoring
-	for _, location := range locations {
-		x1 := float32(location.LocationX)
-		x2 := float32(location.LocationX + location.Source.Width)
-		y1 := float32(location.LocationY)
-		y2 := float32(location.LocationY + location.Source.Height)
+	for _, part := range parts {
+		x1 := float32(part.LocationX)
+		x2 := float32(part.LocationX + part.Source.Width)
+		y1 := float32(part.LocationY)
+		y2 := float32(part.LocationY + part.Source.Height)
 		vertex := [...]float32{
 			x1, y1,
 			x2, y1,
@@ -172,7 +172,7 @@ func (context *Context) DrawTextureParts(
 			x2, y2,
 		}
 
-		src := location.Source
+		src := part.Source
 		tu1 := float32(src.X) / float32(texture.textureWidth)
 		tu2 := float32(src.X+src.Width) / float32(texture.textureWidth)
 		tv1 := float32(src.Y) / float32(texture.textureHeight)