Add Toshiba Tec LIUST-A00 utilities

liust-50/charset/charset.go

@@ -0,0 +1,211 @@
+package charset
+
+import (
+	"bytes"
+	_ "embed"
+	"image"
+	_ "image/png"
+	"log"
+)
+
+// Charsets are loosely based on CP 437 and JIS X 0201.
+
+var runesJapan2 = [256]rune{
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+	0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+	0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+	0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+	0x58, 0x59, 0x5A, 0x5B, '¥', 0x5D, 0x5E, 0x5F,
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+	0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, '⌂',
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	'▒', '｡', '｢', '｣', '､', '･', 'ｦ', 'ｧ',
+	'ｨ', 'ｩ', 'ｪ', 'ｫ', 'ｬ', 'ｭ', 'ｮ', 'ｯ',
+	'ｰ', 'ｱ', 'ｲ', 'ｳ', 'ｴ', 'ｵ', 'ｶ', 'ｷ',
+	'ｸ', 'ｹ', 'ｺ', 'ｻ', 'ｼ', 'ｽ', 'ｾ', 'ｿ',
+	'ﾀ', 'ﾁ', 'ﾂ', 'ﾃ', 'ﾄ', 'ﾅ', 'ﾆ', 'ﾇ',
+	'ﾈ', 'ﾉ', 'ﾊ', 'ﾋ', 'ﾌ', 'ﾍ', 'ﾎ', 'ﾏ',
+	'ﾐ', 'ﾑ', 'ﾒ', 'ﾓ', 'ﾔ', 'ﾕ', 'ﾖ', 'ﾗ',
+	'ﾘ', 'ﾙ', 'ﾚ', 'ﾛ', 'ﾜ', 'ﾝ', 'ﾞ', 'ﾟ',
+	'α', 'ß', 'Γ', 'π', 'Σ', 'σ', 'µ', 'τ',
+	'Φ', 'Θ', 'Ω', 'δ', '∞', 'φ', 'ε', '∩',
+	'→', '←', '↓', '↑', '½', '¼', '★', '◊',
+	'㎏', '℔', '<27>', '×', '▾', '▴', '日', ' ',
+}
+
+var runesInternational = [256]rune{
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+	0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+	0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+	0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+	0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+	0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, '⌂',
+	'Ç', 'ü', 'é', 'â', 'ä', 'à', 'å', 'ç',
+	'ê', 'ë', 'è', 'ï', 'î', 'ì', 'Ä', 'Å',
+	'É', 'æ', 'Æ', 'ô', 'ö', 'ò', 'û', 'ù',
+	'ÿ', 'Ö', 'Ü', '¢', '£', '¥', '₧', 'ƒ',
+	'á', 'í', 'ó', 'ú', 'ñ', 'Ñ', 'ª', 'º',
+	'¿', '⌐', '¬', '½', '¼', '¡', '«', '»',
+	'░', '▒', '▓' - 1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, '█', '▄', '▌', '▐', '▀',
+	'α', 'ß', 'Γ', 'π', 'Σ', 'σ', 'µ', 'τ',
+	'Φ', 'Θ', 'Ω', 'δ', '∞', 'φ', 'ε', '∩',
+	'≡', '±', '≥', '≤', '⌠', '⌡', '÷', '≈',
+	'°', '∙', '·', '√', 'ⁿ', '²', '■', ' ',
+}
+
+var runesInternationalVariants = []string{
+	"#$@[\\]^`{|}~", // USA
+	"#$à·ç§^`éùè╍",  // France
+	"#$§ÄÖÜ^`äöüß",  // Germany
+	"£$@[\\]^`{|}~", // UK
+	"#$@ÆØÅ^`æøå~",  // Denmark 1
+	"#¤ÉÄÖÅÜéäöåü",  // Sweden
+	"#$@·\\é^ùàòèì", // Italy
+	"₧$@¡Ñ¿^`╍ñ}~",  // Spain
+	"#$@[¥]^`{|}~",  // Japan
+	"#¤ÉÆØÅÜéæøåü",  // Norway
+	"#$ÉÆØÅÜéæøåü",  // Denmark 2
+	"#$á¡Ñ¿é`íñóú",  // Spain 2
+	"#$á¡Ñ¿éüíñóú",  // Latin America
+}
+
+var internationalVariantsChars = []byte{
+	0x23, 0x24, 0x40, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x7B, 0x7C, 0x7D, 0x7E}
+
+// ResolveCharToRune tries to decode a character into a Unicode rune.
+// It may return rune(-1) if the character is deemed to have no representation.
+func ResolveCharToRune(char, charset uint8) rune {
+	if charset == 0x63 {
+		return runesJapan2[char]
+	}
+	if int(charset) >= len(runesInternationalVariants) {
+		return -1
+	}
+
+	for i, b := range internationalVariantsChars {
+		if char == b {
+			return []rune(runesInternationalVariants[charset])[i]
+		}
+	}
+	return runesInternational[char]
+}
+
+// ResolveRune tries to find a corresponding character for a Unicode rune.
+func ResolveRune(r rune, charset uint8) (uint8, bool) {
+	if charset == 0x63 {
+		for i, ch := range runesJapan2 {
+			if ch == r {
+				return uint8(i), true
+			}
+		}
+		return 0, false
+	}
+	if int(charset) >= len(runesInternationalVariants) {
+		return 0, false
+	}
+
+	variantRunes := []rune(runesInternationalVariants[charset])
+	for i, ch := range variantRunes {
+		if ch == r {
+			return internationalVariantsChars[i], true
+		}
+	}
+	for i, ch := range runesInternational {
+		if ch == r {
+			return uint8(i), true
+		}
+	}
+	return 0, false
+}
+
+//go:embed japan.png
+var pngJapan2 []byte
+var imageJapan2 image.Image
+
+//go:embed germany.png
+var pngGermany []byte
+var imageGermany image.Image
+
+//go:embed international.png
+var pngInternational []byte
+var imageInternational image.Image
+
+func init() {
+	var err error
+	imageJapan2, _, err = image.Decode(bytes.NewReader(pngJapan2))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	imageGermany, _, err = image.Decode(bytes.NewReader(pngGermany))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	imageInternational, _, err = image.Decode(bytes.NewReader(pngInternational))
+	if err != nil {
+		log.Fatalln(err)
+	}
+}
+
+// ResolveCharToImage tries to decode a character into a 5x7 bitmap image
+// (white on black).
+func ResolveCharToImage(char, charset uint8) image.Image {
+	const (
+		gridWidth  = 6
+		gridHeight = 8
+	)
+
+	var src image.Image
+	var col, row int
+	if charset == 0x63 {
+		src, col, row = imageJapan2, int(char)/16, int(char)%16
+	} else if int(charset) < len(runesInternationalVariants) {
+		src, col, row = imageGermany, int(char)/16, int(char)%16
+		for i, b := range internationalVariantsChars {
+			if char == b {
+				src, col, row = imageInternational, i, int(charset)
+			}
+		}
+	} else {
+		return nil
+	}
+
+	x0 := col * gridWidth
+	y0 := row * gridHeight
+	return src.(interface {
+		SubImage(r image.Rectangle) image.Image
+	}).SubImage(image.Rect(
+		x0,
+		y0,
+		x0+gridWidth-1,
+		y0+gridHeight-1,
+	))
+}