src/x11draw.c

   1 static void k8t_DrawLine (K8Term *term, int x1, int x2, int scry, int lineno, int dontcopy) {
   2   //fprintf(stderr, "%d: k8t_DrawLine: x1=%d; x2=%d; scry=%d; row:%d; lineno=%d\n", mclock_ticks(), x1, x2, scry, term->row, lineno);
   3   if (term == NULL || scry < 0 || scry >= term->row) return;
   4   if (scry == term->row-1 && term->cmdline.cmdMode != K8T_CMDMODE_NONE) { xdrawcmdline(term, &term->cmdline, scry); return; }
   5   if (lineno < 0 || lineno >= term->linecount) {
   6     k8t_DrawClear(term, 0, scry, term->col-1, scry);
   7     k8t_DrawCopy(term, 0, scry, term->col, 1);
   8   } else {
   9     int ic, ib, ox, sl;
  10     int stx, ex;
  11     K8TGlyph base, new;
  12     K8TLine l = term->line[lineno];
  13     //
  14     if (lineno < term->row && term->topline == 0) {
  15       if (!term->dirty[lineno]) return;
  16       if (!dontcopy) {
  17         // fix 'dirty' flag for line
  18         if (term->dirty[lineno]&0x02) {
  19           // mark full line as dirty
  20           stx = 0;
  21           ex = term->col;
  22           term->dirty[lineno] = 0;
  23         } else {
  24           term->dirty[lineno] = 0;
  25           if (x1 > 0) for (int x = 0; x < x1; ++x) if (l[x].state&K8T_GLYPH_DIRTY) { term->dirty[lineno] = 1; break; }
  26           if (!term->dirty[lineno] && x2 < term->col) for (int x = x2; x < term->col; ++x) if (l[x].state&K8T_GLYPH_DIRTY) { term->dirty[lineno] = 1; break; }
  27           //
  28           // find dirty region
  29           for (stx = x1; stx < x2; ++stx) if (l[stx].state&K8T_GLYPH_DIRTY) break;
  30           for (ex = x2; ex > stx; --ex) if (l[ex-1].state&K8T_GLYPH_DIRTY) break;
  31           if (stx >= x2 || ex <= stx) return; // nothing to do
  32         }
  33       } else {
  34         // 'dontcopy' means that the whole screen is dirty
  35         stx = 0;
  36         ex = term->col;
  37         term->dirty[lineno] = 0;
  38       }
  39     } else {
  40       //if (lineno < term->row) term->dirty[lineno] = 0;
  41       stx = 0;
  42       ex = term->col;
  43     }
  44     //
  45     base = l[stx];
  46     if (term->sel.bx != -1 && k8t_isSelected(term, stx, lineno)) base.attr ^= K8T_ATTR_REVERSE;
  47     ic = ib = 0;
  48     ox = stx;
  49     //k8t_DrawClear(term, stx, scry, ex-1, scry); //k8: actually, we don't need this for good monospace fonts, so...
  50     for (int x = stx; x < ex; ++x) {
  51       new = l[x];
  52       l[x].state &= ~K8T_GLYPH_DIRTY; //!
  53       if (term->sel.bx != -1 && k8t_isSelected(term, x, lineno)) new.attr ^= K8T_ATTR_REVERSE;
  54       if (ib > 0 && (K8T_ATTRCMP(base, new) || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  55         // flush k8t_Draw buffer
  56         k8t_DrawString(term, term->drawbuf, &base, ox, scry, ic, ib);
  57         ic = ib = 0;
  58       }
  59       if (ib == 0) { ox = x; base = new; }
  60       sl = k8t_UTF8Size(new.c);
  61       memcpy(term->drawbuf+ib, new.c, sl);
  62       ib += sl;
  63       ++ic;
  64     }
  65     if (ib > 0) k8t_DrawString(term, term->drawbuf, &base, ox, scry, ic, ib);
  66     //k8t_DrawCopy(term, 0, scry, term->col, 1);
  67     //if (term->c.y == lineno && term->c.x >= stx && term->c.x < ex) k8t_DrawCursor();
  68     if (!dontcopy) k8t_DrawCopy(term, stx, scry, ex-stx, 1);
  69   }
  70 }
  71
  72
  73 static void k8t_DrawRegion (K8Term *term, int x1, int y1, int x2, int y2, int forced) {
  74   if (term != NULL) {
  75     int fulldirty = 0;
  76     //
  77     term->justSwapped = 0;
  78     //
  79     if (!forced && (xw.state&K8T_WIN_VISIBLE) == 0) {
  80       //dlogf("invisible");
  81       lastDrawTime = term->lastDrawTime = 1;
  82       term->wantRedraw = 1;
  83       return;
  84     }
  85     //
  86     if (y1 == 0 && y2 == term->row) {
  87       fulldirty = 1;
  88       for (int y = 0; y < y2; ++y) if (!(term->dirty[y]&0x02)) { fulldirty = 0; break; }
  89     }
  90     //
  91     if (term->topline < term->row) {
  92       for (int y = y1; y < y2; ++y) k8t_DrawLine(term, x1, x2, y+term->topline, y, fulldirty);
  93     }
  94     if (term->topline > 0) {
  95       int scry = K8T_MIN(term->topline, term->row), y = term->row;
  96       //
  97       fulldirty = 1;
  98       if (term->topline >= term->row) y += term->topline-term->row;
  99       while (--scry >= 0) {
 100         k8t_DrawLine(term, 0, term->col, scry, y, 0);
 101         ++y;
 102       }
 103     }
 104     if (fulldirty) k8t_DrawCopy(term, 0, 0, term->col, term->row);
 105     k8t_DrawCursor(term);
 106     xdrawTabBar();
 107     //XFlush(xw.dpy);
 108     lastDrawTime = term->lastDrawTime = mclock_ticks();
 109     term->wantRedraw = 0;
 110   }
 111 }
 112
 113
 114 static void k8t_Draw (K8Term *term, int forced) {
 115   if (term != NULL) {
 116     //fprintf(stderr, "k8t_Draw(%d) (%d)\n", forced, mclock_ticks());
 117     k8t_DrawRegion(term, 0, 0, term->col, term->row, forced);
 118   }
 119 }