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st/st-wide-glyphs.diff

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From 5770f2fc02afca341c275fc340bbc5003ecc3df8 Mon Sep 17 00:00:00 2001
From: Iskustvo <iskustvo@yahoo.com>
Date: Sat, 7 Jan 2023 01:23:37 +0100
Subject: [PATCH] [PATCH] add glyph wide support patch
---
st.c | 3 +-
st.h | 6 +++
win.h | 2 +-
x.c | 141 ++++++++++++++++++++++++++++++----------------------------
4 files changed, 81 insertions(+), 71 deletions(-)
diff --git a/st.c b/st.c
index 62def59..cc6c78e 100644
--- a/st.c
+++ b/st.c
@@ -2640,7 +2640,8 @@ draw(void)
drawregion(0, 0, term.col, term.row);
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 fd3b0d8..0053050 100644
--- a/st.h
+++ b/st.h
@@ -36,6 +36,12 @@ enum glyph_attribute {
ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
};
+enum drawing_mode {
+ DRAW_NONE = 0,
+ DRAW_BG = 1 << 0,
+ DRAW_FG = 1 << 1,
+};
+
enum selection_mode {
SEL_IDLE = 0,
SEL_EMPTY = 1,
diff --git a/win.h b/win.h
index 6de960d..94679e4 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 aa09997..85deee6 100644
--- a/x.c
+++ b/x.c
@@ -142,7 +142,7 @@ typedef struct {
static inline ushort sixd_to_16bit(int);
static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
-static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
+static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int, int);
static void xdrawglyph(Glyph, int, int);
static void xclear(int, int, int, int);
static int xgeommasktogravity(int);
@@ -1372,7 +1372,7 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
}
void
-xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
+xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y, int dmode)
{
int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
@@ -1463,47 +1463,40 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
if (base.mode & ATTR_INVISIBLE)
fg = bg;
- /* Intelligent cleaning up of the borders. */
- if (x == 0) {
- xclear(0, (y == 0)? 0 : winy, borderpx,
- winy + win.ch +
- ((winy + win.ch >= borderpx + win.th)? win.h : 0));
- }
- if (winx + width >= borderpx + win.tw) {
- xclear(winx + width, (y == 0)? 0 : winy, win.w,
- ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
- }
- if (y == 0)
- xclear(winx, 0, winx + width, borderpx);
- if (winy + win.ch >= borderpx + win.th)
- xclear(winx, winy + win.ch, winx + width, win.h);
-
- /* Clean up the region we want to draw to. */
- XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
-
- /* Set the clip region because Xft is sometimes dirty. */
- r.x = 0;
- r.y = 0;
- r.height = win.ch;
- r.width = width;
- XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
-
- /* Render the glyphs. */
- XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
-
- /* Render underline and strikethrough. */
- if (base.mode & ATTR_UNDERLINE) {
- XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1,
- width, 1);
- }
-
- if (base.mode & ATTR_STRUCK) {
- XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3,
- width, 1);
- }
-
- /* Reset clip to none. */
- XftDrawSetClip(xw.draw, 0);
+ if (dmode & DRAW_BG) {
+ /* Intelligent cleaning up of the borders. */
+ if (x == 0) {
+ xclear(0, (y == 0)? 0 : winy, borderpx,
+ winy + win.ch +
+ ((winy + win.ch >= borderpx + win.th)? win.h : 0));
+ }
+ if (winx + width >= borderpx + win.tw) {
+ xclear(winx + width, (y == 0)? 0 : winy, win.w,
+ ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
+ }
+ if (y == 0)
+ xclear(winx, 0, winx + width, borderpx);
+ if (winy + win.ch >= borderpx + win.th)
+ xclear(winx, winy + win.ch, winx + width, win.h);
+ /* Fill the background */
+ XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
+ }
+
+ if (dmode & DRAW_FG) {
+ /* Render the glyphs. */
+ XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
+
+ /* Render underline and strikethrough. */
+ if (base.mode & ATTR_UNDERLINE) {
+ XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
+ width, 1);
+ }
+
+ if (base.mode & ATTR_STRUCK) {
+ XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
+ width, 1);
+ }
+ }
}
void
@@ -1513,18 +1506,21 @@ xdrawglyph(Glyph g, int x, int y)
XftGlyphFontSpec spec;
numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
- xdrawglyphfontspecs(&spec, g, numspecs, x, y);
+ xdrawglyphfontspecs(&spec, g, numspecs, x, y, DRAW_BG | DRAW_FG);
}
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 wide glyphs and ligatures broken by the cursor. */
+ xdrawline(line, 0, oy, len);
if (IS_SET(MODE_HIDE))
return;
@@ -1648,32 +1644,39 @@ xstartdraw(void)
void
xdrawline(Line line, int x1, int y1, int x2)
{
- int i, x, ox, numspecs;
+ int i, x, ox, numspecs, numspecs_cached;
Glyph base, new;
- XftGlyphFontSpec *specs = xw.specbuf;
-
- numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
- i = ox = 0;
- for (x = x1; x < x2 && i < numspecs; x++) {
- new = line[x];
- if (new.mode == ATTR_WDUMMY)
- continue;
- if (selected(x, y1))
- new.mode ^= ATTR_REVERSE;
- if (i > 0 && ATTRCMP(base, new)) {
- xdrawglyphfontspecs(specs, base, i, ox, y1);
- specs += i;
- numspecs -= i;
- i = 0;
- }
- if (i == 0) {
- ox = x;
- base = new;
+ XftGlyphFontSpec *specs;
+
+ numspecs_cached = xmakeglyphfontspecs(xw.specbuf, &line[x1], x2 - x1, x1, y1);
+
+ /* Draw line in 2 passes: background and foreground. This way wide glyphs
+ won't get truncated (#223) */
+ for (int dmode = DRAW_BG; dmode <= DRAW_FG; dmode <<= 1) {
+ specs = xw.specbuf;
+ numspecs = numspecs_cached;
+ i = ox = 0;
+ for (x = x1; x < x2 && i < numspecs; x++) {
+ new = line[x];
+ if (new.mode == ATTR_WDUMMY)
+ continue;
+ if (selected(x, y1))
+ new.mode ^= ATTR_REVERSE;
+ if (i > 0 && ATTRCMP(base, new)) {
+ xdrawglyphfontspecs(specs, base, i, ox, y1, dmode);
+ specs += i;
+ numspecs -= i;
+ i = 0;
+ }
+ if (i == 0) {
+ ox = x;
+ base = new;
+ }
+ i++;
}
- i++;
+ if (i > 0)
+ xdrawglyphfontspecs(specs, base, i, ox, y1, dmode);
}
- if (i > 0)
- xdrawglyphfontspecs(specs, base, i, ox, y1);
}
void
--
2.39.0
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