fixed optimized drawing routine and factored some code.

diff --git a/st.c b/st.c
index 5f206fd..5c7d855 100644 (file)
--- a/st.c
+++ b/st.c
@@ -46,8 +46,8 @@
 
 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
 enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
-enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW, 
-       CURSOR_SAVE, CURSOR_LOAD };
+enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE = 1, 
+       CURSOR_DRAW = 0, CURSOR_SAVE, CURSOR_LOAD };
 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
 enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
@@ -711,7 +711,7 @@ csihandle(void) {
                        case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                break;
                        case 25:
-                               term.c.hide = 1;
+                               term.c.hide = CURSOR_HIDE;
                                break;
                        case 1048: /* XXX: no alt. screen to erase/save */
                        case 1049:
@@ -760,7 +760,7 @@ csihandle(void) {
                        case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                break;
                        case 25:
-                               term.c.hide = 0;
+                               term.c.hide = CURSOR_DRAW;
                                break;
                        case 1048: 
                        case 1049: /* XXX: no alt. screen to erase/save */
@@ -1166,8 +1166,7 @@ draw(int dummy) {
                        if(term.line[y][x].state & GLYPH_SET)
                                xdrawc(x, y, term.line[y][x]);
 
-       if(!term.c.hide)
-               xcursor(CURSOR_DRAW);
+       xcursor(term.c.hide);
        XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
        XFlush(xw.dis);
 }
@@ -1187,19 +1186,23 @@ draw(int redraw_all) {
                i = ox = 0;
                for(x = 0; x < term.col; x++) {
                        new = term.line[y][x];
-                       if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
-                               buf[i++] = new.c;
-                       else {
+                       if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
+                                               i >= DRAW_BUF_SIZ)) {
                                xdraws(buf, base, ox, y, i);
-                               buf[0] = new.c;
-                               i = 1;
-                               ox = x;
-                               base = new;
+                               i = 0;
+                       }
+                       if(new.state & GLYPH_SET) {
+                               if(i == 0) {
+                                       ox = x;
+                                       base = new;
+                               }
+                               buf[i++] = new.c;
                        }
                }
-               xdraws(buf, base, ox, y, i);
+               if(i > 0)
+                       xdraws(buf, base, ox, y, i);
        }
-       xcursor(term.c.hide ? CURSOR_HIDE : CURSOR_DRAW);
+       xcursor(term.c.hide);
        XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
        XFlush(xw.dis);
 }