Add new example "drawing"

Makefile

@@ -1,17 +1,18 @@
 smoketest: FORCE
 	mkdir -p out
-	tinygo build -o ./out/all.zero-kb02.uf2          --size short --target ./targets/zero-kb02.json        ./games/all/
-	tinygo build -o ./out/flappygopher.zero-kb02.uf2 --size short --target ./targets/zero-kb02.json        ./games/flappygopher/
-	tinygo build -o ./out/jumpingopher.zero-kb02.uf2 --size short --target ./targets/zero-kb02.json        ./games/jumpingopher/
-	tinygo build -o ./out/blocks.zero-kb02.uf2       --size short --target ./targets/zero-kb02.json        ./games/blocks/
-	tinygo build -o ./out/example_GeoM.zero-kb02.uf2 --size short --target ./targets/zero-kb02.json        ./examples/GeoM/
-	tinygo build -o ./out/all.gopher-badge.uf2       --size short --target gopher-badge                    ./games/all/
-	tinygo build -o ./out/all.pybadge.uf2            --size short --target pybadge                         ./games/all/
-	tinygo build -o ./out/all.wioterminal.uf2        --size short --target wioterminal                     ./games/all/
-	tinygo build -o ./out/all.macropad-rp2040.uf2    --size short --target macropad-rp2040                 ./games/all/
-	tinygo build -o ./out/all.gopher-board-i2c.uf2   --size short --target ./targets/gopher-board-i2c.json ./games/all/
-	tinygo build -o ./out/all.gopher-board-spi.uf2   --size short --target ./targets/gopher-board-spi.json ./games/all/
-	tinygo build -o ./out/all.wasm                   --size short --target wasm --no-debug --panic trap    ./games/all/
-	tinygo build -o ./out/goradius.zero-kb02.uf2     --size short --target ./targets/zero-kb02.json        ./games/goradius/
+	tinygo build -o ./out/all.zero-kb02.uf2          	--size short --target ./targets/zero-kb02.json        ./games/all/
+	tinygo build -o ./out/flappygopher.zero-kb02.uf2 	--size short --target ./targets/zero-kb02.json        ./games/flappygopher/
+	tinygo build -o ./out/jumpingopher.zero-kb02.uf2 	--size short --target ./targets/zero-kb02.json        ./games/jumpingopher/
+	tinygo build -o ./out/blocks.zero-kb02.uf2       	--size short --target ./targets/zero-kb02.json        ./games/blocks/
+	tinygo build -o ./out/example_GeoM.zero-kb02.uf2 	--size short --target ./targets/zero-kb02.json        ./examples/GeoM/
+	tinygo build -o ./out/example_drawing.zero-kb02.uf2 --size short --target ./targets/zero-kb02.json 		  ./examples/drawing/
+	tinygo build -o ./out/all.gopher-badge.uf2       	--size short --target gopher-badge                    ./games/all/
+	tinygo build -o ./out/all.pybadge.uf2            	--size short --target pybadge                         ./games/all/
+	tinygo build -o ./out/all.wioterminal.uf2        	--size short --target wioterminal                     ./games/all/
+	tinygo build -o ./out/all.macropad-rp2040.uf2    	--size short --target macropad-rp2040                 ./games/all/
+	tinygo build -o ./out/all.gopher-board-i2c.uf2   	--size short --target ./targets/gopher-board-i2c.json ./games/all/
+	tinygo build -o ./out/all.gopher-board-spi.uf2   	--size short --target ./targets/gopher-board-spi.json ./games/all/
+	tinygo build -o ./out/all.wasm                   	--size short --target wasm --no-debug --panic trap    ./games/all/
+	tinygo build -o ./out/goradius.zero-kb02.uf2     	--size short --target ./targets/zero-kb02.json        ./games/goradius/
 
 FORCE:

examples/drawing/drawing/drawing.go

@@ -0,0 +1,97 @@
+package drawing
+
+import (
+	"github.com/sago35/koebiten"
+	"tinygo.org/x/drivers/pixel"
+)
+
+var (
+	white = pixel.NewMonochrome(0xFF, 0xFF, 0xFF)
+	black = pixel.NewMonochrome(0x00, 0x00, 0x00)
+)
+
+type Pointer struct {
+	x, y int
+}
+
+type Game struct {
+	pointer Pointer
+	thick   int
+	canvas  *koebiten.Image
+}
+
+func NewGame() *Game {
+	return &Game{
+		pointer: Pointer{64, 32},
+		canvas:  koebiten.NewImage(128, 64),
+	}
+}
+
+func (g *Game) Update() error {
+	if koebiten.IsKeyPressed(koebiten.KeyArrowLeft) {
+		g.pointer.x--
+	}
+	if koebiten.IsKeyPressed(koebiten.KeyArrowRight) {
+		g.pointer.x++
+	}
+	if koebiten.IsKeyPressed(koebiten.KeyArrowUp) {
+		g.pointer.y--
+	}
+	if koebiten.IsKeyPressed(koebiten.KeyArrowDown) {
+		g.pointer.y++
+	}
+
+	if koebiten.IsKeyPressed(koebiten.KeyRotaryLeft) {
+		g.thick--
+		if g.thick < 0 {
+			g.thick = 0
+		}
+	}
+	if koebiten.IsKeyPressed(koebiten.KeyRotaryRight) {
+		g.thick++
+		if g.thick > 10 {
+			g.thick = 10
+		}
+	}
+
+	if koebiten.IsKeyPressed(koebiten.Key0) {
+		g.draw(g.canvas, g.pointer.x, g.pointer.y, black)
+	}
+	if koebiten.IsKeyPressed(koebiten.Key1) || koebiten.IsKeyPressed(koebiten.Key2) ||
+		koebiten.IsKeyPressed(koebiten.Key3) || koebiten.IsKeyPressed(koebiten.Key4) ||
+		koebiten.IsKeyPressed(koebiten.Key5) || koebiten.IsKeyPressed(koebiten.Key6) ||
+		koebiten.IsKeyPressed(koebiten.Key7) || koebiten.IsKeyPressed(koebiten.Key8) ||
+		koebiten.IsKeyPressed(koebiten.Key9) || koebiten.IsKeyPressed(koebiten.Key10) ||
+		koebiten.IsKeyPressed(koebiten.Key11) {
+		g.draw(g.canvas, g.pointer.x, g.pointer.y, white)
+	}
+
+	return nil
+}
+
+func (g *Game) Draw(screen *koebiten.Image) {
+	g.canvas.DrawImage(screen, koebiten.DrawImageOptions{})
+	koebiten.DrawFilledCircle(screen, g.pointer.x, g.pointer.y, g.thick+1, white)
+}
+
+func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
+	return 128, 64
+}
+
+func (g *Game) draw(canvas *koebiten.Image, x, y int, color pixel.BaseColor) {
+	koebiten.DrawFilledCircle(g.canvas, x, y, g.thick, color)
+}
+
+func isAnyKeyPressed() bool {
+	keys := []koebiten.Key{
+		koebiten.Key0, koebiten.Key1, koebiten.Key2, koebiten.Key3,
+		koebiten.Key4, koebiten.Key5, koebiten.Key6, koebiten.Key7,
+		koebiten.Key8, koebiten.Key9, koebiten.Key10, koebiten.Key11,
+	}
+	for _, key := range keys {
+		if koebiten.IsKeyPressed(key) {
+			return true
+		}
+	}
+	return false
+}

examples/drawing/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"log"
+
+	"github.com/sago35/koebiten"
+	"github.com/sago35/koebiten/examples/drawing/drawing"
+	"github.com/sago35/koebiten/hardware"
+)
+
+func main() {
+	koebiten.SetHardware(hardware.Device)
+	koebiten.SetWindowSize(128, 64)
+	koebiten.SetWindowTitle("Drawing")
+
+	game := drawing.NewGame()
+
+	if err := koebiten.RunGame(game); err != nil {
+		log.Fatal(err)
+	}
+}