Move win-agnostic parts of draw/drawregion to st.c

Introduces three functions to encapsulate X-specific behavior:
 * xdrawline: draws a portion of a single line (used by drawregion)
 * xbegindraw: called to prepare for drawing (will be useful for e.g.
   Wayland) and returns true if drawing should happen
 * xfinishdraw: called to finish drawing (used by draw)

Signed-off-by: Devin J. Pohly <djpohly@gmail.com>
This commit is contained in:
Devin J. Pohly 2018-02-24 14:53:23 -06:00
parent 05c66cb37d
commit 88d8293fb4
4 changed files with 69 additions and 51 deletions

25
st.c
View file

@ -166,6 +166,8 @@ static int32_t tdefcolor(int *, int *, int);
static void tdeftran(char);
static void tstrsequence(uchar);
static void drawregion(int, int, int, int);
static void selscroll(int, int);
static void selsnap(int *, int *, int);
@ -2526,6 +2528,29 @@ resettitle(void)
xsettitle(NULL);
}
void
drawregion(int x1, int y1, int x2, int y2)
{
int y;
for (y = y1; y < y2; y++) {
if (!term.dirty[y])
continue;
term.dirty[y] = 0;
xdrawline(term.line[y], x1, y, x2);
}
}
void
draw(void)
{
if (!xstartdraw())
return;
drawregion(0, 0, term.col, term.row);
xdrawcursor();
xfinishdraw();
}
void
redraw(void)
{

1
st.h
View file

@ -131,6 +131,7 @@ typedef union {
void die(const char *, ...);
void redraw(void);
void draw(void);
void iso14755(const Arg *);
void printscreen(const Arg *);

7
win.h
View file

@ -23,12 +23,12 @@ enum win_mode {
|MODE_MOUSEMANY,
};
void draw(void);
void drawregion(int, int, int, int);
void xbell(void);
void xclipcopy(void);
void xdrawcursor(void);
void xdrawline(Line, int, int, int);
void xhints(void);
void xfinishdraw(void);
void xloadcols(void);
int xsetcolorname(int, const char *);
void xsettitle(char *);
@ -36,3 +36,4 @@ int xsetcursor(int);
void xsetmode(int, unsigned int);
void xsetpointermotion(int);
void xsetsel(char *);
int xstartdraw(void);

87
x.c
View file

@ -129,7 +129,6 @@ static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int)
static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
static void xdrawglyph(Glyph, int, int);
static void xclear(int, int, int, int);
static void xdrawcursor(void);
static int xgeommasktogravity(int);
static void xinit(void);
static void cresize(int, int);
@ -1512,10 +1511,46 @@ xsettitle(char *p)
XFree(prop.value);
}
void
draw(void)
int
xstartdraw(void)
{
return IS_SET(MODE_VISIBLE);
}
void
xdrawline(Line line, int x1, int y1, int x2)
{
int i, x, ox, numspecs;
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;
}
i++;
}
if (i > 0)
xdrawglyphfontspecs(specs, base, i, ox, y1);
}
void
xfinishdraw(void)
{
drawregion(0, 0, term.col, term.row);
XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
win.h, 0, 0);
XSetForeground(xw.dpy, dc.gc,
@ -1523,50 +1558,6 @@ draw(void)
defaultfg : defaultbg].pixel);
}
void
drawregion(int x1, int y1, int x2, int y2)
{
int i, x, y, ox, numspecs;
Glyph base, new;
XftGlyphFontSpec *specs;
if (!(IS_SET(MODE_VISIBLE)))
return;
for (y = y1; y < y2; y++) {
if (!term.dirty[y])
continue;
term.dirty[y] = 0;
specs = xw.specbuf;
numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
i = ox = 0;
for (x = x1; x < x2 && i < numspecs; x++) {
new = term.line[y][x];
if (new.mode == ATTR_WDUMMY)
continue;
if (selected(x, y))
new.mode ^= ATTR_REVERSE;
if (i > 0 && ATTRCMP(base, new)) {
xdrawglyphfontspecs(specs, base, i, ox, y);
specs += i;
numspecs -= i;
i = 0;
}
if (i == 0) {
ox = x;
base = new;
}
i++;
}
if (i > 0)
xdrawglyphfontspecs(specs, base, i, ox, y);
}
xdrawcursor();
}
void
expose(XEvent *ev)
{