214 lines
6.1 KiB
C
214 lines
6.1 KiB
C
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/*
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* Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
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* MIT/X Consortium License
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*/
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/*
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* U+25XX codepoints data
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*
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* References:
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* http://www.unicode.org/charts/PDF/U2500.pdf
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* http://www.unicode.org/charts/PDF/U2580.pdf
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*
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* Test page:
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* https://github.com/GNOME/vte/blob/master/doc/boxes.txt
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*/
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/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */
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/* Categories (mutually exclusive except BDB): */
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/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */
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#define BDL (1<<8) /* Box Draw Lines (light/double/heavy) */
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#define BDA (1<<9) /* Box Draw Arc (light) */
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#define BBD (1<<10) /* Box Block Down (lower) X/8 */
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#define BBL (2<<10) /* Box Block Left X/8 */
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#define BBU (3<<10) /* Box Block Upper X/8 */
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#define BBR (4<<10) /* Box Block Right X/8 */
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#define BBQ (5<<10) /* Box Block Quadrants */
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#define BRL (6<<10) /* Box Braille (data is lower byte of U28XX) */
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#define BBS (1<<14) /* Box Block Shades */
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#define BDB (1<<15) /* Box Draw is Bold */
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/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical */
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/* Heavy is light+double (literally drawing light+double align to form heavy) */
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#define LL (1<<0)
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#define LU (1<<1)
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#define LR (1<<2)
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#define LD (1<<3)
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#define LH (LL+LR)
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#define LV (LU+LD)
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#define DL (1<<4)
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#define DU (1<<5)
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#define DR (1<<6)
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#define DD (1<<7)
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#define DH (DL+DR)
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#define DV (DU+DD)
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#define HL (LL+DL)
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#define HU (LU+DU)
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#define HR (LR+DR)
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#define HD (LD+DD)
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#define HH (HL+HR)
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#define HV (HU+HD)
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/* (BBQ) Quadrants Top/Bottom x Left/Right */
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#define TL (1<<0)
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#define TR (1<<1)
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#define BL (1<<2)
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#define BR (1<<3)
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/* Data for U+2500 - U+259F except dashes/diagonals */
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static const unsigned short boxdata[256] = {
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/* light lines */
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[0x00] = BDL + LH, /* light horizontal */
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[0x02] = BDL + LV, /* light vertical */
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[0x0c] = BDL + LD + LR, /* light down and right */
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[0x10] = BDL + LD + LL, /* light down and left */
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[0x14] = BDL + LU + LR, /* light up and right */
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[0x18] = BDL + LU + LL, /* light up and left */
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[0x1c] = BDL + LV + LR, /* light vertical and right */
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[0x24] = BDL + LV + LL, /* light vertical and left */
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[0x2c] = BDL + LH + LD, /* light horizontal and down */
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[0x34] = BDL + LH + LU, /* light horizontal and up */
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[0x3c] = BDL + LV + LH, /* light vertical and horizontal */
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[0x74] = BDL + LL, /* light left */
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[0x75] = BDL + LU, /* light up */
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[0x76] = BDL + LR, /* light right */
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[0x77] = BDL + LD, /* light down */
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/* heavy [+light] lines */
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[0x01] = BDL + HH,
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[0x03] = BDL + HV,
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[0x0d] = BDL + HR + LD,
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[0x0e] = BDL + HD + LR,
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[0x0f] = BDL + HD + HR,
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[0x11] = BDL + HL + LD,
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[0x12] = BDL + HD + LL,
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[0x13] = BDL + HD + HL,
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[0x15] = BDL + HR + LU,
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[0x16] = BDL + HU + LR,
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[0x17] = BDL + HU + HR,
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[0x19] = BDL + HL + LU,
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[0x1a] = BDL + HU + LL,
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[0x1b] = BDL + HU + HL,
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[0x1d] = BDL + HR + LV,
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[0x1e] = BDL + HU + LD + LR,
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[0x1f] = BDL + HD + LR + LU,
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[0x20] = BDL + HV + LR,
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[0x21] = BDL + HU + HR + LD,
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[0x22] = BDL + HD + HR + LU,
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[0x23] = BDL + HV + HR,
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[0x25] = BDL + HL + LV,
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[0x26] = BDL + HU + LD + LL,
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[0x27] = BDL + HD + LU + LL,
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[0x28] = BDL + HV + LL,
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[0x29] = BDL + HU + HL + LD,
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[0x2a] = BDL + HD + HL + LU,
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[0x2b] = BDL + HV + HL,
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[0x2d] = BDL + HL + LD + LR,
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[0x2e] = BDL + HR + LL + LD,
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[0x2f] = BDL + HH + LD,
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[0x30] = BDL + HD + LH,
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[0x31] = BDL + HD + HL + LR,
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[0x32] = BDL + HR + HD + LL,
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[0x33] = BDL + HH + HD,
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[0x35] = BDL + HL + LU + LR,
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[0x36] = BDL + HR + LU + LL,
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[0x37] = BDL + HH + LU,
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[0x38] = BDL + HU + LH,
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[0x39] = BDL + HU + HL + LR,
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[0x3a] = BDL + HU + HR + LL,
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[0x3b] = BDL + HH + HU,
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[0x3d] = BDL + HL + LV + LR,
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[0x3e] = BDL + HR + LV + LL,
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[0x3f] = BDL + HH + LV,
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[0x40] = BDL + HU + LH + LD,
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[0x41] = BDL + HD + LH + LU,
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[0x42] = BDL + HV + LH,
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[0x43] = BDL + HU + HL + LD + LR,
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[0x44] = BDL + HU + HR + LD + LL,
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[0x45] = BDL + HD + HL + LU + LR,
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[0x46] = BDL + HD + HR + LU + LL,
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[0x47] = BDL + HH + HU + LD,
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[0x48] = BDL + HH + HD + LU,
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[0x49] = BDL + HV + HL + LR,
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[0x4a] = BDL + HV + HR + LL,
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[0x4b] = BDL + HV + HH,
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[0x78] = BDL + HL,
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[0x79] = BDL + HU,
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[0x7a] = BDL + HR,
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[0x7b] = BDL + HD,
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[0x7c] = BDL + HR + LL,
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[0x7d] = BDL + HD + LU,
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[0x7e] = BDL + HL + LR,
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[0x7f] = BDL + HU + LD,
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/* double [+light] lines */
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[0x50] = BDL + DH,
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[0x51] = BDL + DV,
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[0x52] = BDL + DR + LD,
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[0x53] = BDL + DD + LR,
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[0x54] = BDL + DR + DD,
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[0x55] = BDL + DL + LD,
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[0x56] = BDL + DD + LL,
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[0x57] = BDL + DL + DD,
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[0x58] = BDL + DR + LU,
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[0x59] = BDL + DU + LR,
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[0x5a] = BDL + DU + DR,
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[0x5b] = BDL + DL + LU,
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[0x5c] = BDL + DU + LL,
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[0x5d] = BDL + DL + DU,
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[0x5e] = BDL + DR + LV,
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[0x5f] = BDL + DV + LR,
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[0x60] = BDL + DV + DR,
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[0x61] = BDL + DL + LV,
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[0x62] = BDL + DV + LL,
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[0x63] = BDL + DV + DL,
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[0x64] = BDL + DH + LD,
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[0x65] = BDL + DD + LH,
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[0x66] = BDL + DD + DH,
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[0x67] = BDL + DH + LU,
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[0x68] = BDL + DU + LH,
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[0x69] = BDL + DH + DU,
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[0x6a] = BDL + DH + LV,
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[0x6b] = BDL + DV + LH,
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[0x6c] = BDL + DH + DV,
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/* (light) arcs */
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[0x6d] = BDA + LD + LR,
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[0x6e] = BDA + LD + LL,
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[0x6f] = BDA + LU + LL,
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[0x70] = BDA + LU + LR,
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/* Lower (Down) X/8 block (data is 8 - X) */
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[0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4,
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[0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0,
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/* Left X/8 block (data is X) */
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[0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4,
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[0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1,
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/* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */
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[0x80] = BBU + 4, [0x94] = BBU + 1,
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[0x90] = BBR + 4, [0x95] = BBR + 7,
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/* Quadrants */
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[0x96] = BBQ + BL,
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[0x97] = BBQ + BR,
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[0x98] = BBQ + TL,
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[0x99] = BBQ + TL + BL + BR,
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[0x9a] = BBQ + TL + BR,
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[0x9b] = BBQ + TL + TR + BL,
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[0x9c] = BBQ + TL + TR + BR,
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[0x9d] = BBQ + TR,
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[0x9e] = BBQ + BL + TR,
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[0x9f] = BBQ + BL + TR + BR,
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/* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */
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[0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3,
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/* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */
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/* U+2571 - U+2573: unsupported (diagonals) */
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};
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