st-boxdraw_v2-0.8.2.diff (18550B)
1 From 318ae7fe1bd614cb937c8f43d855a1c2e8e93fd4 Mon Sep 17 00:00:00 2001 2 From: "Avi Halachmi (:avih)" <avihpit@yahoo.com> 3 Date: Wed, 26 Dec 2018 14:51:45 +0200 4 Subject: [PATCH] boxdraw_v2: custom render lines/blocks/braille for perfect 5 alignment 6 7 It seems impossible to ensure that blocks and line drawing glyphs 8 align without visible gaps for all combinations of arbitrary font, 9 size and width/height scale factor. 10 11 This commit adds options to render most of the lines/blocks and 12 braille codepoints without using the font such that they align 13 perfectly regardless of font, size or other configuration values. 14 15 Supported codepoints are U+2500 - U+259F except dashes/diagonals, 16 and U28XX. 17 18 The lines/blocks data is stored as 16-bit values at boxdraw_data.h 19 20 boxdraw/braille are independent, disabled by default at config[.def].h 21 --- 22 Makefile | 3 +- 23 boxdraw.c | 194 ++++++++++++++++++++++++++++++++++++++++++++ 24 boxdraw_data.h | 214 +++++++++++++++++++++++++++++++++++++++++++++++++ 25 config.def.h | 12 +++ 26 st.c | 3 + 27 st.h | 10 +++ 28 x.c | 21 +++-- 29 7 files changed, 451 insertions(+), 6 deletions(-) 30 create mode 100644 boxdraw.c 31 create mode 100644 boxdraw_data.h 32 33 diff --git a/Makefile b/Makefile 34 index 470ac86..6dfa212 100644 35 --- a/Makefile 36 +++ b/Makefile 37 @@ -4,7 +4,7 @@ 38 39 include config.mk 40 41 -SRC = st.c x.c 42 +SRC = st.c x.c boxdraw.c 43 OBJ = $(SRC:.c=.o) 44 45 all: options st 46 @@ -23,6 +23,7 @@ config.h: 47 48 st.o: config.h st.h win.h 49 x.o: arg.h config.h st.h win.h 50 +boxdraw.o: config.h st.h boxdraw_data.h 51 52 $(OBJ): config.h config.mk 53 54 diff --git a/boxdraw.c b/boxdraw.c 55 new file mode 100644 56 index 0000000..28a92d0 57 --- /dev/null 58 +++ b/boxdraw.c 59 @@ -0,0 +1,194 @@ 60 +/* 61 + * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih 62 + * MIT/X Consortium License 63 + */ 64 + 65 +#include <X11/Xft/Xft.h> 66 +#include "st.h" 67 +#include "boxdraw_data.h" 68 + 69 +/* Rounded non-negative integers division of n / d */ 70 +#define DIV(n, d) (((n) + (d) / 2) / (d)) 71 + 72 +static Display *xdpy; 73 +static Colormap xcmap; 74 +static XftDraw *xd; 75 +static Visual *xvis; 76 + 77 +static void drawbox(int, int, int, int, XftColor *, XftColor *, ushort); 78 +static void drawboxlines(int, int, int, int, XftColor *, ushort); 79 + 80 +/* public API */ 81 + 82 +void 83 +boxdraw_xinit(Display *dpy, Colormap cmap, XftDraw *draw, Visual *vis) 84 +{ 85 + xdpy = dpy; xcmap = cmap; xd = draw, xvis = vis; 86 +} 87 + 88 +int 89 +isboxdraw(Rune u) 90 +{ 91 + Rune block = u & ~0xff; 92 + return (boxdraw && block == 0x2500 && boxdata[(uint8_t)u]) || 93 + (boxdraw_braille && block == 0x2800); 94 +} 95 + 96 +/* the "index" is actually the entire shape data encoded as ushort */ 97 +ushort 98 +boxdrawindex(const Glyph *g) 99 +{ 100 + if (boxdraw_braille && (g->u & ~0xff) == 0x2800) 101 + return BRL | (uint8_t)g->u; 102 + if (boxdraw_bold && (g->mode & ATTR_BOLD)) 103 + return BDB | boxdata[(uint8_t)g->u]; 104 + return boxdata[(uint8_t)g->u]; 105 +} 106 + 107 +void 108 +drawboxes(int x, int y, int cw, int ch, XftColor *fg, XftColor *bg, 109 + const XftGlyphFontSpec *specs, int len) 110 +{ 111 + for ( ; len-- > 0; x += cw, specs++) 112 + drawbox(x, y, cw, ch, fg, bg, (ushort)specs->glyph); 113 +} 114 + 115 +/* implementation */ 116 + 117 +void 118 +drawbox(int x, int y, int w, int h, XftColor *fg, XftColor *bg, ushort bd) 119 +{ 120 + ushort cat = bd & ~(BDB | 0xff); /* mask out bold and data */ 121 + if (bd & (BDL | BDA)) { 122 + /* lines (light/double/heavy/arcs) */ 123 + drawboxlines(x, y, w, h, fg, bd); 124 + 125 + } else if (cat == BBD) { 126 + /* lower (8-X)/8 block */ 127 + int d = DIV((uint8_t)bd * h, 8); 128 + XftDrawRect(xd, fg, x, y + d, w, h - d); 129 + 130 + } else if (cat == BBU) { 131 + /* upper X/8 block */ 132 + XftDrawRect(xd, fg, x, y, w, DIV((uint8_t)bd * h, 8)); 133 + 134 + } else if (cat == BBL) { 135 + /* left X/8 block */ 136 + XftDrawRect(xd, fg, x, y, DIV((uint8_t)bd * w, 8), h); 137 + 138 + } else if (cat == BBR) { 139 + /* right (8-X)/8 block */ 140 + int d = DIV((uint8_t)bd * w, 8); 141 + XftDrawRect(xd, fg, x + d, y, w - d, h); 142 + 143 + } else if (cat == BBQ) { 144 + /* Quadrants */ 145 + int w2 = DIV(w, 2), h2 = DIV(h, 2); 146 + if (bd & TL) 147 + XftDrawRect(xd, fg, x, y, w2, h2); 148 + if (bd & TR) 149 + XftDrawRect(xd, fg, x + w2, y, w - w2, h2); 150 + if (bd & BL) 151 + XftDrawRect(xd, fg, x, y + h2, w2, h - h2); 152 + if (bd & BR) 153 + XftDrawRect(xd, fg, x + w2, y + h2, w - w2, h - h2); 154 + 155 + } else if (bd & BBS) { 156 + /* Shades - data is 1/2/3 for 25%/50%/75% alpha, respectively */ 157 + int d = (uint8_t)bd; 158 + XftColor xfc; 159 + XRenderColor xrc = { .alpha = 0xffff }; 160 + 161 + xrc.red = DIV(fg->color.red * d + bg->color.red * (4 - d), 4); 162 + xrc.green = DIV(fg->color.green * d + bg->color.green * (4 - d), 4); 163 + xrc.blue = DIV(fg->color.blue * d + bg->color.blue * (4 - d), 4); 164 + 165 + XftColorAllocValue(xdpy, xvis, xcmap, &xrc, &xfc); 166 + XftDrawRect(xd, &xfc, x, y, w, h); 167 + XftColorFree(xdpy, xvis, xcmap, &xfc); 168 + 169 + } else if (cat == BRL) { 170 + /* braille, each data bit corresponds to one dot at 2x4 grid */ 171 + int w1 = DIV(w, 2); 172 + int h1 = DIV(h, 4), h2 = DIV(h, 2), h3 = DIV(3 * h, 4); 173 + 174 + if (bd & 1) XftDrawRect(xd, fg, x, y, w1, h1); 175 + if (bd & 2) XftDrawRect(xd, fg, x, y + h1, w1, h2 - h1); 176 + if (bd & 4) XftDrawRect(xd, fg, x, y + h2, w1, h3 - h2); 177 + if (bd & 8) XftDrawRect(xd, fg, x + w1, y, w - w1, h1); 178 + if (bd & 16) XftDrawRect(xd, fg, x + w1, y + h1, w - w1, h2 - h1); 179 + if (bd & 32) XftDrawRect(xd, fg, x + w1, y + h2, w - w1, h3 - h2); 180 + if (bd & 64) XftDrawRect(xd, fg, x, y + h3, w1, h - h3); 181 + if (bd & 128) XftDrawRect(xd, fg, x + w1, y + h3, w - w1, h - h3); 182 + 183 + } 184 +} 185 + 186 +void 187 +drawboxlines(int x, int y, int w, int h, XftColor *fg, ushort bd) 188 +{ 189 + /* s: stem thickness. width/8 roughly matches underscore thickness. */ 190 + /* We draw bold as 1.5 * normal-stem and at least 1px thicker. */ 191 + /* doubles draw at least 3px, even when w or h < 3. bold needs 6px. */ 192 + int mwh = MIN(w, h); 193 + int base_s = MAX(1, DIV(mwh, 8)); 194 + int bold = (bd & BDB) && mwh >= 6; /* possibly ignore boldness */ 195 + int s = bold ? MAX(base_s + 1, DIV(3 * base_s, 2)) : base_s; 196 + int w2 = DIV(w - s, 2), h2 = DIV(h - s, 2); 197 + /* the s-by-s square (x + w2, y + h2, s, s) is the center texel. */ 198 + /* The base length (per direction till edge) includes this square. */ 199 + 200 + int light = bd & (LL | LU | LR | LD); 201 + int double_ = bd & (DL | DU | DR | DD); 202 + 203 + if (light) { 204 + /* d: additional (negative) length to not-draw the center */ 205 + /* texel - at arcs and avoid drawing inside (some) doubles */ 206 + int arc = bd & BDA; 207 + int multi_light = light & (light - 1); 208 + int multi_double = double_ & (double_ - 1); 209 + /* light crosses double only at DH+LV, DV+LH (ref. shapes) */ 210 + int d = arc || (multi_double && !multi_light) ? -s : 0; 211 + 212 + if (bd & LL) 213 + XftDrawRect(xd, fg, x, y + h2, w2 + s + d, s); 214 + if (bd & LU) 215 + XftDrawRect(xd, fg, x + w2, y, s, h2 + s + d); 216 + if (bd & LR) 217 + XftDrawRect(xd, fg, x + w2 - d, y + h2, w - w2 + d, s); 218 + if (bd & LD) 219 + XftDrawRect(xd, fg, x + w2, y + h2 - d, s, h - h2 + d); 220 + } 221 + 222 + /* double lines - also align with light to form heavy when combined */ 223 + if (double_) { 224 + /* 225 + * going clockwise, for each double-ray: p is additional length 226 + * to the single-ray nearer to the previous direction, and n to 227 + * the next. p and n adjust from the base length to lengths 228 + * which consider other doubles - shorter to avoid intersections 229 + * (p, n), or longer to draw the far-corner texel (n). 230 + */ 231 + int dl = bd & DL, du = bd & DU, dr = bd & DR, dd = bd & DD; 232 + if (dl) { 233 + int p = dd ? -s : 0, n = du ? -s : dd ? s : 0; 234 + XftDrawRect(xd, fg, x, y + h2 + s, w2 + s + p, s); 235 + XftDrawRect(xd, fg, x, y + h2 - s, w2 + s + n, s); 236 + } 237 + if (du) { 238 + int p = dl ? -s : 0, n = dr ? -s : dl ? s : 0; 239 + XftDrawRect(xd, fg, x + w2 - s, y, s, h2 + s + p); 240 + XftDrawRect(xd, fg, x + w2 + s, y, s, h2 + s + n); 241 + } 242 + if (dr) { 243 + int p = du ? -s : 0, n = dd ? -s : du ? s : 0; 244 + XftDrawRect(xd, fg, x + w2 - p, y + h2 - s, w - w2 + p, s); 245 + XftDrawRect(xd, fg, x + w2 - n, y + h2 + s, w - w2 + n, s); 246 + } 247 + if (dd) { 248 + int p = dr ? -s : 0, n = dl ? -s : dr ? s : 0; 249 + XftDrawRect(xd, fg, x + w2 + s, y + h2 - p, s, h - h2 + p); 250 + XftDrawRect(xd, fg, x + w2 - s, y + h2 - n, s, h - h2 + n); 251 + } 252 + } 253 +} 254 diff --git a/boxdraw_data.h b/boxdraw_data.h 255 new file mode 100644 256 index 0000000..7890500 257 --- /dev/null 258 +++ b/boxdraw_data.h 259 @@ -0,0 +1,214 @@ 260 +/* 261 + * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih 262 + * MIT/X Consortium License 263 + */ 264 + 265 +/* 266 + * U+25XX codepoints data 267 + * 268 + * References: 269 + * http://www.unicode.org/charts/PDF/U2500.pdf 270 + * http://www.unicode.org/charts/PDF/U2580.pdf 271 + * 272 + * Test page: 273 + * https://github.com/GNOME/vte/blob/master/doc/boxes.txt 274 + */ 275 + 276 +/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */ 277 +/* Categories (mutually exclusive except BDB): */ 278 +/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */ 279 +#define BDL (1<<8) /* Box Draw Lines (light/double/heavy) */ 280 +#define BDA (1<<9) /* Box Draw Arc (light) */ 281 + 282 +#define BBD (1<<10) /* Box Block Down (lower) X/8 */ 283 +#define BBL (2<<10) /* Box Block Left X/8 */ 284 +#define BBU (3<<10) /* Box Block Upper X/8 */ 285 +#define BBR (4<<10) /* Box Block Right X/8 */ 286 +#define BBQ (5<<10) /* Box Block Quadrants */ 287 +#define BRL (6<<10) /* Box Braille (data is lower byte of U28XX) */ 288 + 289 +#define BBS (1<<14) /* Box Block Shades */ 290 +#define BDB (1<<15) /* Box Draw is Bold */ 291 + 292 +/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical */ 293 +/* Heavy is light+double (literally drawing light+double align to form heavy) */ 294 +#define LL (1<<0) 295 +#define LU (1<<1) 296 +#define LR (1<<2) 297 +#define LD (1<<3) 298 +#define LH (LL+LR) 299 +#define LV (LU+LD) 300 + 301 +#define DL (1<<4) 302 +#define DU (1<<5) 303 +#define DR (1<<6) 304 +#define DD (1<<7) 305 +#define DH (DL+DR) 306 +#define DV (DU+DD) 307 + 308 +#define HL (LL+DL) 309 +#define HU (LU+DU) 310 +#define HR (LR+DR) 311 +#define HD (LD+DD) 312 +#define HH (HL+HR) 313 +#define HV (HU+HD) 314 + 315 +/* (BBQ) Quadrants Top/Bottom x Left/Right */ 316 +#define TL (1<<0) 317 +#define TR (1<<1) 318 +#define BL (1<<2) 319 +#define BR (1<<3) 320 + 321 +/* Data for U+2500 - U+259F except dashes/diagonals */ 322 +static const unsigned short boxdata[256] = { 323 + /* light lines */ 324 + [0x00] = BDL + LH, /* light horizontal */ 325 + [0x02] = BDL + LV, /* light vertical */ 326 + [0x0c] = BDL + LD + LR, /* light down and right */ 327 + [0x10] = BDL + LD + LL, /* light down and left */ 328 + [0x14] = BDL + LU + LR, /* light up and right */ 329 + [0x18] = BDL + LU + LL, /* light up and left */ 330 + [0x1c] = BDL + LV + LR, /* light vertical and right */ 331 + [0x24] = BDL + LV + LL, /* light vertical and left */ 332 + [0x2c] = BDL + LH + LD, /* light horizontal and down */ 333 + [0x34] = BDL + LH + LU, /* light horizontal and up */ 334 + [0x3c] = BDL + LV + LH, /* light vertical and horizontal */ 335 + [0x74] = BDL + LL, /* light left */ 336 + [0x75] = BDL + LU, /* light up */ 337 + [0x76] = BDL + LR, /* light right */ 338 + [0x77] = BDL + LD, /* light down */ 339 + 340 + /* heavy [+light] lines */ 341 + [0x01] = BDL + HH, 342 + [0x03] = BDL + HV, 343 + [0x0d] = BDL + HR + LD, 344 + [0x0e] = BDL + HD + LR, 345 + [0x0f] = BDL + HD + HR, 346 + [0x11] = BDL + HL + LD, 347 + [0x12] = BDL + HD + LL, 348 + [0x13] = BDL + HD + HL, 349 + [0x15] = BDL + HR + LU, 350 + [0x16] = BDL + HU + LR, 351 + [0x17] = BDL + HU + HR, 352 + [0x19] = BDL + HL + LU, 353 + [0x1a] = BDL + HU + LL, 354 + [0x1b] = BDL + HU + HL, 355 + [0x1d] = BDL + HR + LV, 356 + [0x1e] = BDL + HU + LD + LR, 357 + [0x1f] = BDL + HD + LR + LU, 358 + [0x20] = BDL + HV + LR, 359 + [0x21] = BDL + HU + HR + LD, 360 + [0x22] = BDL + HD + HR + LU, 361 + [0x23] = BDL + HV + HR, 362 + [0x25] = BDL + HL + LV, 363 + [0x26] = BDL + HU + LD + LL, 364 + [0x27] = BDL + HD + LU + LL, 365 + [0x28] = BDL + HV + LL, 366 + [0x29] = BDL + HU + HL + LD, 367 + [0x2a] = BDL + HD + HL + LU, 368 + [0x2b] = BDL + HV + HL, 369 + [0x2d] = BDL + HL + LD + LR, 370 + [0x2e] = BDL + HR + LL + LD, 371 + [0x2f] = BDL + HH + LD, 372 + [0x30] = BDL + HD + LH, 373 + [0x31] = BDL + HD + HL + LR, 374 + [0x32] = BDL + HR + HD + LL, 375 + [0x33] = BDL + HH + HD, 376 + [0x35] = BDL + HL + LU + LR, 377 + [0x36] = BDL + HR + LU + LL, 378 + [0x37] = BDL + HH + LU, 379 + [0x38] = BDL + HU + LH, 380 + [0x39] = BDL + HU + HL + LR, 381 + [0x3a] = BDL + HU + HR + LL, 382 + [0x3b] = BDL + HH + HU, 383 + [0x3d] = BDL + HL + LV + LR, 384 + [0x3e] = BDL + HR + LV + LL, 385 + [0x3f] = BDL + HH + LV, 386 + [0x40] = BDL + HU + LH + LD, 387 + [0x41] = BDL + HD + LH + LU, 388 + [0x42] = BDL + HV + LH, 389 + [0x43] = BDL + HU + HL + LD + LR, 390 + [0x44] = BDL + HU + HR + LD + LL, 391 + [0x45] = BDL + HD + HL + LU + LR, 392 + [0x46] = BDL + HD + HR + LU + LL, 393 + [0x47] = BDL + HH + HU + LD, 394 + [0x48] = BDL + HH + HD + LU, 395 + [0x49] = BDL + HV + HL + LR, 396 + [0x4a] = BDL + HV + HR + LL, 397 + [0x4b] = BDL + HV + HH, 398 + [0x78] = BDL + HL, 399 + [0x79] = BDL + HU, 400 + [0x7a] = BDL + HR, 401 + [0x7b] = BDL + HD, 402 + [0x7c] = BDL + HR + LL, 403 + [0x7d] = BDL + HD + LU, 404 + [0x7e] = BDL + HL + LR, 405 + [0x7f] = BDL + HU + LD, 406 + 407 + /* double [+light] lines */ 408 + [0x50] = BDL + DH, 409 + [0x51] = BDL + DV, 410 + [0x52] = BDL + DR + LD, 411 + [0x53] = BDL + DD + LR, 412 + [0x54] = BDL + DR + DD, 413 + [0x55] = BDL + DL + LD, 414 + [0x56] = BDL + DD + LL, 415 + [0x57] = BDL + DL + DD, 416 + [0x58] = BDL + DR + LU, 417 + [0x59] = BDL + DU + LR, 418 + [0x5a] = BDL + DU + DR, 419 + [0x5b] = BDL + DL + LU, 420 + [0x5c] = BDL + DU + LL, 421 + [0x5d] = BDL + DL + DU, 422 + [0x5e] = BDL + DR + LV, 423 + [0x5f] = BDL + DV + LR, 424 + [0x60] = BDL + DV + DR, 425 + [0x61] = BDL + DL + LV, 426 + [0x62] = BDL + DV + LL, 427 + [0x63] = BDL + DV + DL, 428 + [0x64] = BDL + DH + LD, 429 + [0x65] = BDL + DD + LH, 430 + [0x66] = BDL + DD + DH, 431 + [0x67] = BDL + DH + LU, 432 + [0x68] = BDL + DU + LH, 433 + [0x69] = BDL + DH + DU, 434 + [0x6a] = BDL + DH + LV, 435 + [0x6b] = BDL + DV + LH, 436 + [0x6c] = BDL + DH + DV, 437 + 438 + /* (light) arcs */ 439 + [0x6d] = BDA + LD + LR, 440 + [0x6e] = BDA + LD + LL, 441 + [0x6f] = BDA + LU + LL, 442 + [0x70] = BDA + LU + LR, 443 + 444 + /* Lower (Down) X/8 block (data is 8 - X) */ 445 + [0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4, 446 + [0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0, 447 + 448 + /* Left X/8 block (data is X) */ 449 + [0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4, 450 + [0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1, 451 + 452 + /* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */ 453 + [0x80] = BBU + 4, [0x94] = BBU + 1, 454 + [0x90] = BBR + 4, [0x95] = BBR + 7, 455 + 456 + /* Quadrants */ 457 + [0x96] = BBQ + BL, 458 + [0x97] = BBQ + BR, 459 + [0x98] = BBQ + TL, 460 + [0x99] = BBQ + TL + BL + BR, 461 + [0x9a] = BBQ + TL + BR, 462 + [0x9b] = BBQ + TL + TR + BL, 463 + [0x9c] = BBQ + TL + TR + BR, 464 + [0x9d] = BBQ + TR, 465 + [0x9e] = BBQ + BL + TR, 466 + [0x9f] = BBQ + BL + TR + BR, 467 + 468 + /* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */ 469 + [0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3, 470 + 471 + /* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */ 472 + /* U+2571 - U+2573: unsupported (diagonals) */ 473 +}; 474 diff --git a/config.def.h b/config.def.h 475 index 0e01717..e3654a9 100644 476 --- a/config.def.h 477 +++ b/config.def.h 478 @@ -56,6 +56,18 @@ static unsigned int blinktimeout = 800; 479 */ 480 static unsigned int cursorthickness = 2; 481 482 +/* 483 + * 1: render most of the lines/blocks characters without using the font for 484 + * perfect alignment between cells (U2500 - U259F except dashes/diagonals). 485 + * Bold affects lines thickness if boxdraw_bold is not 0. Italic is ignored. 486 + * 0: disable (render all U25XX glyphs normally from the font). 487 + */ 488 +const int boxdraw = 0; 489 +const int boxdraw_bold = 0; 490 + 491 +/* braille (U28XX): 1: render as adjacent "pixels", 0: use font */ 492 +const int boxdraw_braille = 0; 493 + 494 /* 495 * bell volume. It must be a value between -100 and 100. Use 0 for disabling 496 * it 497 diff --git a/st.c b/st.c 498 index b8e6077..d65f722 100644 499 --- a/st.c 500 +++ b/st.c 501 @@ -1230,6 +1230,9 @@ tsetchar(Rune u, Glyph *attr, int x, int y) 502 term.dirty[y] = 1; 503 term.line[y][x] = *attr; 504 term.line[y][x].u = u; 505 + 506 + if (isboxdraw(u)) 507 + term.line[y][x].mode |= ATTR_BOXDRAW; 508 } 509 510 void 511 diff --git a/st.h b/st.h 512 index 38c61c4..9275632 100644 513 --- a/st.h 514 +++ b/st.h 515 @@ -33,6 +33,7 @@ enum glyph_attribute { 516 ATTR_WRAP = 1 << 8, 517 ATTR_WIDE = 1 << 9, 518 ATTR_WDUMMY = 1 << 10, 519 + ATTR_BOXDRAW = 1 << 11, 520 ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT, 521 }; 522 523 @@ -110,6 +111,14 @@ void *xmalloc(size_t); 524 void *xrealloc(void *, size_t); 525 char *xstrdup(char *); 526 527 +int isboxdraw(Rune); 528 +ushort boxdrawindex(const Glyph *); 529 +#ifdef XFT_VERSION 530 +/* only exposed to x.c, otherwise we'll need Xft.h for the types */ 531 +void boxdraw_xinit(Display *, Colormap, XftDraw *, Visual *); 532 +void drawboxes(int, int, int, int, XftColor *, XftColor *, const XftGlyphFontSpec *, int); 533 +#endif 534 + 535 /* config.h globals */ 536 extern char *utmp; 537 extern char *stty_args; 538 @@ -120,3 +129,4 @@ extern char *termname; 539 extern unsigned int tabspaces; 540 extern unsigned int defaultfg; 541 extern unsigned int defaultbg; 542 +extern const int boxdraw, boxdraw_bold, boxdraw_braille; 543 diff --git a/x.c b/x.c 544 index 0422421..c740bed 100644 545 --- a/x.c 546 +++ b/x.c 547 @@ -1118,6 +1118,8 @@ xinit(int cols, int rows) 548 xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0); 549 if (xsel.xtarget == None) 550 xsel.xtarget = XA_STRING; 551 + 552 + boxdraw_xinit(xw.dpy, xw.cmap, xw.draw, xw.vis); 553 } 554 555 int 556 @@ -1164,8 +1166,13 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x 557 yp = winy + font->ascent; 558 } 559 560 - /* Lookup character index with default font. */ 561 - glyphidx = XftCharIndex(xw.dpy, font->match, rune); 562 + if (mode & ATTR_BOXDRAW) { 563 + /* minor shoehorning: boxdraw uses only this ushort */ 564 + glyphidx = boxdrawindex(&glyphs[i]); 565 + } else { 566 + /* Lookup character index with default font. */ 567 + glyphidx = XftCharIndex(xw.dpy, font->match, rune); 568 + } 569 if (glyphidx) { 570 specs[numspecs].font = font->match; 571 specs[numspecs].glyph = glyphidx; 572 @@ -1372,8 +1379,12 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i 573 r.width = width; 574 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1); 575 576 - /* Render the glyphs. */ 577 - XftDrawGlyphFontSpec(xw.draw, fg, specs, len); 578 + if (base.mode & ATTR_BOXDRAW) { 579 + drawboxes(winx, winy, width / len, win.ch, fg, bg, specs, len); 580 + } else { 581 + /* Render the glyphs. */ 582 + XftDrawGlyphFontSpec(xw.draw, fg, specs, len); 583 + } 584 585 /* Render underline and strikethrough. */ 586 if (base.mode & ATTR_UNDERLINE) { 587 @@ -1416,7 +1427,7 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) 588 /* 589 * Select the right color for the right mode. 590 */ 591 - g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE; 592 + g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE|ATTR_BOXDRAW; 593 594 if (IS_SET(MODE_REVERSE)) { 595 g.mode |= ATTR_REVERSE; 596 -- 597 2.17.1 598