ebitenutil: use bitmapfont for the debug print

This removes ebitenutil/internal/assets.

ebitenutil/debugprint.go

@@ -12,20 +12,32 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:generate go run gen.go
+//go:generate go run github.com/hajimehoshi/file2byteslice/cmd/file2byteslice -input text.png -output text.png.go -package ebitenutil -var textPng
+
 package ebitenutil
 
 import (
+	"bytes"
 	"image"
+	_ "image/png"
 
 	"github.com/hajimehoshi/ebiten/v2"
-	"github.com/hajimehoshi/ebiten/v2/ebitenutil/internal/assets"
 )
 
 var (
-	debugPrintTextImage     = ebiten.NewImageFromImage(assets.CreateTextImage())
+	debugPrintTextImage     *ebiten.Image
 	debugPrintTextSubImages = map[rune]*ebiten.Image{}
 )
 
+func init() {
+	img, _, err := image.Decode(bytes.NewReader(textPng))
+	if err != nil {
+		panic(err)
+	}
+	debugPrintTextImage = ebiten.NewImageFromImage(img)
+}
+
 // DebugPrint draws the string str on the image on left top corner.
 //
 // The available runes are in U+0000 to U+00FF, which is C0 Controls and Basic Latin and C1 Controls and Latin-1 Supplement.
@@ -51,8 +63,8 @@ func drawDebugText(rt *ebiten.Image, str string, ox, oy int, shadow bool) {
 	w, _ := debugPrintTextImage.Size()
 	for _, c := range str {
 		const (
-			cw = assets.CharWidth
-			ch = assets.CharHeight
+			cw = 6
+			ch = 16
 		)
 		if c == '\n' {
 			x = 0

ebitenutil/gen.go

@@ -0,0 +1,80 @@
+// Copyright 2022 The Ebitengine Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build ignore
+// +build ignore
+
+package main
+
+import (
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"os"
+
+	"github.com/hajimehoshi/bitmapfont/v2"
+	"golang.org/x/image/font"
+	"golang.org/x/image/math/fixed"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+	}
+}
+
+func run() error {
+	// These values are copied from an example in github.com/hajimehoshi/bitmapfont.
+	const (
+		charWidth  = 6
+		lineHeight = 16
+
+		dotX = 4
+		dotY = 12
+	)
+
+	var lines []string
+	for j := 0; j < 8; j++ {
+		var line string
+		for i := 0; i < 32; i++ {
+			line += string(rune(i + j*32))
+		}
+		lines = append(lines, line)
+	}
+
+	d := font.Drawer{
+		Dst:  image.NewRGBA(image.Rect(0, 0, charWidth*32, lineHeight*8)),
+		Src:  image.NewUniform(color.White),
+		Face: bitmapfont.Face,
+		Dot:  fixed.P(dotX, dotY),
+	}
+	for _, line := range lines {
+		d.Dot.X = fixed.I(dotX)
+		d.DrawString(line)
+		d.Dot.Y += fixed.I(lineHeight)
+	}
+
+	f, err := os.Create("text.png")
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if err := png.Encode(f, d.Dst); err != nil {
+		return err
+	}
+
+	return nil
+}

ebitenutil/internal/assets/assets.go

@@ -1,53 +0,0 @@
-// Copyright 2014 Hajime Hoshi
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:generate png2compressedrgba -input text.png -output /tmp/compressedTextRGBA
-//go:generate go run github.com/hajimehoshi/file2byteslice/cmd/file2byteslice -input /tmp/compressedTextRGBA -output textrgba.go -package assets -var compressedTextRGBA
-//go:generate gofmt -s -w .
-
-package assets
-
-import (
-	"bytes"
-	"compress/gzip"
-	"fmt"
-	"image"
-	"io/ioutil"
-)
-
-const (
-	imgWidth  = 192
-	imgHeight = 128
-
-	CharWidth  = 6
-	CharHeight = 16
-)
-
-func CreateTextImage() *image.RGBA {
-	s, err := gzip.NewReader(bytes.NewReader(compressedTextRGBA))
-	if err != nil {
-		panic(fmt.Sprintf("assets: gzip.NewReader failed: %v", err))
-	}
-	defer s.Close()
-
-	pix, err := ioutil.ReadAll(s)
-	if err != nil {
-		panic(fmt.Sprintf("assets: ioutil.ReadAll failed: %v", err))
-	}
-	return &image.RGBA{
-		Pix:    pix,
-		Stride: 4 * imgWidth,
-		Rect:   image.Rect(0, 0, imgWidth, imgHeight),
-	}
-}

ebitenutil/internal/assets/license.md

@@ -1,19 +0,0 @@
-# License
-
-## text.png
-
-```
--
-M+ BITMAP FONTS            Copyright 2002-2005  COZ <coz@users.sourceforge.jp>
--
-
-LICENSE
-
-
-
-
-These fonts are free softwares.
-Unlimited permission is granted to use, copy, and distribute it, with
-or without modification, either commercially and noncommercially.
-THESE FONTS ARE PROVIDED "AS IS" WITHOUT WARRANTY.
-```