diff options
Diffstat (limited to 'patches/08th-ligatures-scrollback-20210824-0.8.4.diff')
| -rw-r--r-- | patches/08th-ligatures-scrollback-20210824-0.8.4.diff | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/patches/08th-ligatures-scrollback-20210824-0.8.4.diff b/patches/08th-ligatures-scrollback-20210824-0.8.4.diff deleted file mode 100644 index 94e842a..0000000 --- a/patches/08th-ligatures-scrollback-20210824-0.8.4.diff +++ /dev/null @@ -1,314 +0,0 @@ -diff --git a/Makefile b/Makefile -index 470ac86..38240da 100644 ---- a/Makefile -+++ b/Makefile -@@ -4,7 +4,7 @@ - - include config.mk - --SRC = st.c x.c -+SRC = st.c x.c hb.c - OBJ = $(SRC:.c=.o) - - all: options st -@@ -22,7 +22,8 @@ config.h: - $(CC) $(STCFLAGS) -c $< - - st.o: config.h st.h win.h --x.o: arg.h config.h st.h win.h -+x.o: arg.h config.h st.h win.h hb.h -+hb.o: st.h - - $(OBJ): config.h config.mk - -diff --git a/config.mk b/config.mk -index c070a4a..3d236f0 100644 ---- a/config.mk -+++ b/config.mk -@@ -15,10 +15,12 @@ PKG_CONFIG = pkg-config - # includes and libs - INCS = -I$(X11INC) \ - `$(PKG_CONFIG) --cflags fontconfig` \ -- `$(PKG_CONFIG) --cflags freetype2` -+ `$(PKG_CONFIG) --cflags freetype2` \ -+ `$(PKG_CONFIG) --cflags harfbuzz` - LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \ - `$(PKG_CONFIG) --libs fontconfig` \ -- `$(PKG_CONFIG) --libs freetype2` -+ `$(PKG_CONFIG) --libs freetype2` \ -+ `$(PKG_CONFIG) --libs harfbuzz` - - # flags - STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600 -diff --git a/hb.c b/hb.c -new file mode 100644 -index 0000000..f9c4f76 ---- /dev/null -+++ b/hb.c -@@ -0,0 +1,144 @@ -+#include <stdlib.h> -+#include <stdio.h> -+#include <math.h> -+#include <X11/Xft/Xft.h> -+#include <hb.h> -+#include <hb-ft.h> -+ -+#include "st.h" -+ -+#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, .start = HB_FEATURE_GLOBAL_START, .end = HB_FEATURE_GLOBAL_END } -+ -+void hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length); -+hb_font_t *hbfindfont(XftFont *match); -+ -+typedef struct { -+ XftFont *match; -+ hb_font_t *font; -+} HbFontMatch; -+ -+static int hbfontslen = 0; -+static HbFontMatch *hbfontcache = NULL; -+ -+/* -+ * Replace 0 with a list of font features, wrapped in FEATURE macro, e.g. -+ * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g') -+ */ -+hb_feature_t features[] = { 0 }; -+ -+void -+hbunloadfonts() -+{ -+ for (int i = 0; i < hbfontslen; i++) { -+ hb_font_destroy(hbfontcache[i].font); -+ XftUnlockFace(hbfontcache[i].match); -+ } -+ -+ if (hbfontcache != NULL) { -+ free(hbfontcache); -+ hbfontcache = NULL; -+ } -+ hbfontslen = 0; -+} -+ -+hb_font_t * -+hbfindfont(XftFont *match) -+{ -+ for (int i = 0; i < hbfontslen; i++) { -+ if (hbfontcache[i].match == match) -+ return hbfontcache[i].font; -+ } -+ -+ /* Font not found in cache, caching it now. */ -+ hbfontcache = realloc(hbfontcache, sizeof(HbFontMatch) * (hbfontslen + 1)); -+ FT_Face face = XftLockFace(match); -+ hb_font_t *font = hb_ft_font_create(face, NULL); -+ if (font == NULL) -+ die("Failed to load Harfbuzz font."); -+ -+ hbfontcache[hbfontslen].match = match; -+ hbfontcache[hbfontslen].font = font; -+ hbfontslen += 1; -+ -+ return font; -+} -+ -+void -+hbtransform(XftGlyphFontSpec *specs, const Glyph *glyphs, size_t len, int x, int y) -+{ -+ int start = 0, length = 1, gstart = 0; -+ hb_codepoint_t *codepoints = calloc((unsigned int)len, sizeof(hb_codepoint_t)); -+ -+ for (int idx = 1, specidx = 1; idx < len; idx++) { -+ if (glyphs[idx].mode & ATTR_WDUMMY) { -+ length += 1; -+ continue; -+ } -+ -+ if (specs[specidx].font != specs[start].font || ATTRCMP(glyphs[gstart], glyphs[idx]) || selected(x + idx, y) != selected(x + gstart, y)) { -+ hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length); -+ -+ /* Reset the sequence. */ -+ length = 1; -+ start = specidx; -+ gstart = idx; -+ } else { -+ length += 1; -+ } -+ -+ specidx++; -+ } -+ -+ /* EOL. */ -+ hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length); -+ -+ /* Apply the transformation to glyph specs. */ -+ for (int i = 0, specidx = 0; i < len; i++) { -+ if (glyphs[i].mode & ATTR_WDUMMY) -+ continue; -+ -+ if (codepoints[i] != specs[specidx].glyph) -+ ((Glyph *)glyphs)[i].mode |= ATTR_LIGA; -+ -+ specs[specidx++].glyph = codepoints[i]; -+ } -+ -+ free(codepoints); -+} -+ -+void -+hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length) -+{ -+ hb_font_t *font = hbfindfont(xfont); -+ if (font == NULL) -+ return; -+ -+ Rune rune; -+ ushort mode = USHRT_MAX; -+ hb_buffer_t *buffer = hb_buffer_create(); -+ hb_buffer_set_direction(buffer, HB_DIRECTION_LTR); -+ -+ /* Fill buffer with codepoints. */ -+ for (int i = start; i < (start+length); i++) { -+ rune = string[i].u; -+ mode = string[i].mode; -+ if (mode & ATTR_WDUMMY) -+ rune = 0x0020; -+ hb_buffer_add_codepoints(buffer, &rune, 1, 0, 1); -+ } -+ -+ /* Shape the segment. */ -+ hb_shape(font, buffer, features, sizeof(features)); -+ -+ /* Get new glyph info. */ -+ hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, NULL); -+ -+ /* Write new codepoints. */ -+ for (int i = 0; i < length; i++) { -+ hb_codepoint_t gid = info[i].codepoint; -+ codepoints[start+i] = gid; -+ } -+ -+ /* Cleanup. */ -+ hb_buffer_destroy(buffer); -+} -diff --git a/hb.h b/hb.h -new file mode 100644 -index 0000000..07888df ---- /dev/null -+++ b/hb.h -@@ -0,0 +1,6 @@ -+#include <X11/Xft/Xft.h> -+#include <hb.h> -+#include <hb-ft.h> -+ -+void hbunloadfonts(); -+void hbtransform(XftGlyphFontSpec *, const Glyph *, size_t, int, int); -diff --git a/st.c b/st.c -index edec064..ea13c13 100644 ---- a/st.c -+++ b/st.c -@@ -2652,7 +2652,8 @@ draw(void) - drawregion(0, 0, term.col, term.row); - if (term.scr == 0) - xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], -- term.ocx, term.ocy, term.line[term.ocy][term.ocx]); -+ term.ocx, term.ocy, term.line[term.ocy][term.ocx], -+ term.line[term.ocy], term.col); - term.ocx = cx; - term.ocy = term.c.y; - xfinishdraw(); -diff --git a/st.h b/st.h -index f44e1d3..00c796c 100644 ---- a/st.h -+++ b/st.h -@@ -11,7 +11,8 @@ - #define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d)) - #define DEFAULT(a, b) (a) = (a) ? (a) : (b) - #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x) --#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || \ -+#define ATTRCMP(a, b) (((a).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) != ((b).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) || \ -+ (a).fg != (b).fg || \ - (a).bg != (b).bg) - #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + \ - (t1.tv_nsec-t2.tv_nsec)/1E6) -@@ -33,6 +34,7 @@ enum glyph_attribute { - ATTR_WRAP = 1 << 8, - ATTR_WIDE = 1 << 9, - ATTR_WDUMMY = 1 << 10, -+ ATTR_LIGA = 1 << 11, - ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT, - }; - -diff --git a/win.h b/win.h -index a6ef1b9..bc0d180 100644 ---- a/win.h -+++ b/win.h -@@ -25,7 +25,7 @@ enum win_mode { - - void xbell(void); - void xclipcopy(void); --void xdrawcursor(int, int, Glyph, int, int, Glyph); -+void xdrawcursor(int, int, Glyph, int, int, Glyph, Line, int); - void xdrawline(Line, int, int, int); - void xfinishdraw(void); - void xloadcols(void); -diff --git a/x.c b/x.c -index 210f184..f6d67ef 100644 ---- a/x.c -+++ b/x.c -@@ -19,6 +19,7 @@ char *argv0; - #include "arg.h" - #include "st.h" - #include "win.h" -+#include "hb.h" - - /* types used in config.h */ - typedef struct { -@@ -1031,6 +1032,9 @@ xunloadfont(Font *f) - void - xunloadfonts(void) - { -+ /* Clear Harfbuzz font cache. */ -+ hbunloadfonts(); -+ - /* Free the loaded fonts in the font cache. */ - while (frclen > 0) - XftFontClose(xw.dpy, frc[--frclen].font); -@@ -1229,7 +1233,7 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x - mode = glyphs[i].mode; - - /* Skip dummy wide-character spacing. */ -- if (mode == ATTR_WDUMMY) -+ if (mode & ATTR_WDUMMY) - continue; - - /* Determine font for glyph if different from previous glyph. */ -@@ -1336,6 +1340,9 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x - numspecs++; - } - -+ /* Harfbuzz transformation for ligatures. */ -+ hbtransform(specs, glyphs, len, x, y); -+ - return numspecs; - } - -@@ -1485,14 +1492,17 @@ xdrawglyph(Glyph g, int x, int y) - } - - void --xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) -+xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og, Line line, int len) - { - Color drawcol; - - /* remove the old cursor */ - if (selected(ox, oy)) - og.mode ^= ATTR_REVERSE; -- xdrawglyph(og, ox, oy); -+ -+ /* Redraw the line where cursor was previously. -+ * It will restore the ligatures broken by the cursor. */ -+ xdrawline(line, 0, oy, len); - - if (IS_SET(MODE_HIDE)) - return; |