Implement Xdbe-based double-buffering - st - Simple Terminal
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---
(DIR) commit 94771d05886fbdd2422e66b7c0256ab27fa375cb
(DIR) parent 8fdba7494fe33d3be1f6f96b8e900ef1bca01d47
(HTM) Author: Brandon Invergo <brandon@invergo.net>
Date: Sat, 28 Jul 2012 14:27:26 +0200
Implement Xdbe-based double-buffering
Diffstat:
config.mk | 2 +-
st.c | 50 ++++++++-----------------------
2 files changed, 13 insertions(+), 39 deletions(-)
---
(DIR) diff --git a/config.mk b/config.mk
@@ -12,7 +12,7 @@ X11LIB = /usr/X11R6/lib
# includes and libs
INCS = -I. -I/usr/include -I${X11INC}
-LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lutil
+LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lutil -lXext
# flags
CPPFLAGS = -DVERSION=\"${VERSION}\"
(DIR) diff --git a/st.c b/st.c
@@ -24,6 +24,7 @@
#include <X11/Xutil.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
+#include <X11/extensions/Xdbe.h>
#if defined(__linux)
#include <pty.h>
@@ -178,7 +179,7 @@ typedef struct {
Display* dpy;
Colormap cmap;
Window win;
- Pixmap buf;
+ XdbeBackBuffer buf;
Atom xembed;
XIM xim;
XIC xic;
@@ -270,7 +271,7 @@ static void ttywrite(const char *, size_t);
static void xdraws(char *, Glyph, int, int, int, int);
static void xhints(void);
static void xclear(int, int, int, int);
-static void xcopy(int, int, int, int);
+static void xcopy();
static void xdrawcursor(void);
static void xinit(void);
static void xloadcols(void);
@@ -1620,32 +1621,8 @@ tresize(int col, int row) {
void
xresize(int col, int row) {
- Pixmap newbuf;
- int oldw, oldh;
-
- oldw = xw.bufw;
- oldh = xw.bufh;
xw.bufw = MAX(1, col * xw.cw);
xw.bufh = MAX(1, row * xw.ch);
- newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
- XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
- XFreePixmap(xw.dpy, xw.buf);
- XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
- if(xw.bufw > oldw)
- XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
- xw.bufw-oldw, MIN(xw.bufh, oldh));
- else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
- XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
- xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
- False);
- if(xw.bufh > oldh)
- XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
- xw.bufw, xw.bufh-oldh);
- else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
- XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
- xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
- False);
- xw.buf = newbuf;
}
void
@@ -1801,7 +1778,7 @@ xinit(void) {
CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
| CWColormap,
&attrs);
- xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
+ xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
/* input methods */
@@ -1871,10 +1848,10 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
/* copy buffer pixmap to screen pixmap */
void
-xcopy(int x, int y, int cols, int rows) {
- int src_x = x*xw.cw, src_y = y*xw.ch, src_w = cols*xw.cw, src_h = rows*xw.ch;
- int dst_x = BORDER+src_x, dst_y = BORDER+src_y;
- XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, src_x, src_y, src_w, src_h, dst_x, dst_y);
+xcopy() {
+ XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
+ XdbeSwapBuffers(xw.dpy, swpinfo, 1);
+
}
void
@@ -1918,6 +1895,7 @@ xdrawcursor(void) {
void
draw() {
drawregion(0, 0, term.col, term.row);
+ xcopy();
gettimeofday(&xw.lastdraw, NULL);
}
@@ -1959,7 +1937,6 @@ drawregion(int x1, int y1, int x2, int y2) {
}
if(ib > 0)
xdraws(buf, base, ox, y, ic, ib);
- xcopy(0, y, term.col, 1);
}
xdrawcursor();
}
@@ -1968,13 +1945,10 @@ void
expose(XEvent *ev) {
XExposeEvent *e = &ev->xexpose;
if(xw.state & WIN_REDRAW) {
- if(!e->count) {
+ if(!e->count)
xw.state &= ~WIN_REDRAW;
- xcopy(0, 0, term.col, term.row);
- }
- } else
- XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
- e->width, e->height, e->x, e->y);
+ }
+ xcopy();
}
void