WebSVN – HelenOS – Diff – //trunk/uspace/srv/console/console.c

 /** Index of currently used virtual console.
  */
 int active_console = 0;
 int prev_console = 0;
-/** Information about framebuffer
+/** Information about framebuffer */
- */
 struct {
     int phone;      /**< Framebuffer phone */
     ipcarg_t rows;      /**< Framebuffer rows */
     ipcarg_t cols;      /**< Framebuffer columns */
 } fb_info;
                          * consoles */
 static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
                          * with framebufer used for
                          * faster virtual console
                          * switching */
-/** Size of fb_buf. */
-#define FB_BUF_SIZE 256
-/** Buffer for sending characters to FB driver. */
-static char fb_buf[FB_BUF_SIZE];
-/* Properties of fb_buf data. */
+/** Information on row-span yet unsent to FB driver. */
+struct {
-static int fb_buf_row;      /**< Row where fb_buf data belong. */
+    int row;        /**< Row where the span lies. */
-static int fb_buf_col;      /**< Column where fb_buf data start. */
+    int col;        /**< Leftmost column of the span. */
-static int fb_console;      /**< VC to which fb_buf data belong. */
+    int n;          /**< Width of the span. */
-int fb_bi = 0;          /**< Number of valid chars in fb_buf. */
+} fb_pending;
 /** Size of cwrite_buf. */
 #define CWRITE_BUF_SIZE 256
 /** Buffer for receiving data via the CONSOLE_WRITE call from the client. */
 static char cwrite_buf[CWRITE_BUF_SIZE];
+static void fb_putchar(char c, int row, int col);
 /** Find unused virtual console.
+ *
  */
 static int find_free_connection(void)
         set_rgb_color(attrs->a.r.fg_color, attrs->a.r.bg_color);
         break;
+    }
+}
-/** Write a character vector to FB driver via IPC. */
+/** Send an area of screenbuffer to the FB driver. */
-static ssize_t fb_write(const char *buf, size_t nbyte, int row, int col)
+static void fb_update_area(connection_t *conn, int x, int y, int w, int h)
+{
-    ipcarg_t rc;
+    int i, j;
-    ipc_call_t answer;
+    int rc;
-    aid_t req;
+    attrs_t *attrs;
-    async_serialize_start();
+    keyfield_t *field;
-    req = async_send_2(fb_info.phone, FB_WRITE, row, col, &answer);
-    rc = ipc_data_write_start(fb_info.phone, (void *) buf, nbyte);
-    if (rc != EOK) {
+    if (interbuffer) {
+        for (j = 0; j < h; j++) {
-        async_wait_for(req, NULL);
+            for (i = 0; i < w; i++) {
-        async_serialize_end();
+                interbuffer[i + j * w] =
+                    *get_field_at(&conn->screenbuffer,
-        return (ssize_t) rc;
+                    x + i, y + j);
+            }
-    }
+        }
+        rc = async_req_4_0(fb_info.phone, FB_DRAW_TEXT_DATA,
+            x, y, w, h);
+    } else {
+        rc = ENOTSUP;
+    }
+    if (rc != 0) {
+        attrs = &conn->screenbuffer.attrs;
+        for (j = 0; j < h; j++) {
+            for (i = 0; i < w; i++) {
+                field = get_field_at(&conn->screenbuffer,
+                    x + i, y + j);
+                if (!attrs_same(*attrs, field->attrs))
-    async_wait_for(req, &rc);
+                    set_attrs(&field->attrs);
-    async_serialize_end();
+                attrs = &field->attrs;
-    if (rc == EOK)
-        return (ssize_t) IPC_GET_ARG1(answer);
+                fb_putchar(field->character, y + j, x + i);
-    else
+            }
-        return -1;
+        }
+    }
+}
-/** Flush buffered characters to FB. */
+/** Flush pending cells to FB. */
-static void fb_buf_flush(void)
+static void fb_pending_flush(void)
+{
     screenbuffer_t *scr;
-    int i;
-    scr = &(connections[fb_console].screenbuffer);
+    scr = &(connections[active_console].screenbuffer);
-    if (fb_bi > 0) {
+    if (fb_pending.n > 0) {
-        if (fb_write(fb_buf, fb_bi, fb_buf_row, fb_buf_col) < 0) {
-            /* Try falling back to char-by-char. */
-            for (i = 0; i < fb_bi; i++) {
-                async_msg_3(fb_info.phone, FB_PUTCHAR, fb_buf[i],
+        fb_update_area(&connections[active_console], fb_pending.col,
-                    fb_buf_row, fb_buf_col + i);
+            fb_pending.row, fb_pending.n, 1);
-            }
-        }
-        fb_bi = 0;
+        fb_pending.n = 0;
+    }
+}
-/** Print a character to the active VC with buffering. */
+/** Mark a character cell as changed.
+ *
+ * This adds the cell to the pending rowspan if possible. Otherwise
+ * the old span is flushed first.
+ */
-static void prtchr(char c, int row, int col)
+static void cell_mark_changed(int row, int col)
+{
-    if (fb_bi >= FB_BUF_SIZE)
+    if (fb_pending.n != 0) {
+        if (row != fb_pending.row ||
+            col != fb_pending.col + fb_pending.n) {
-        fb_buf_flush();
+            fb_pending_flush();
+        }
+    }
-    if (fb_bi == 0) {
+    if (fb_pending.n == 0) {
-        fb_buf_row = row;
+        fb_pending.row = row;
-        fb_buf_col = col;
+        fb_pending.col = col;
-        fb_console = active_console;
+    }
-    fb_buf[fb_bi++] = c;
+    ++fb_pending.n;
+}
-/** Check key and process special keys.
+/** Print a character to the active VC with buffering. */
+static void fb_putchar(char c, int row, int col)
- *
+{
+    async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
- *
+}
- */
+/** Process a character from the client (TTY emulation). */
 static void write_char(int console, char key)
+{
     bool flush_cursor = false;
     screenbuffer_t *scr = &(connections[console].screenbuffer);
     switch (key) {
     case '\n':
-        fb_buf_flush();
+        fb_pending_flush();
         flush_cursor = true;
         scr->position_y++;
         scr->position_x = 0;
         break;
     case '\r':
-        fb_buf_flush();
         break;
     case '\t':
-        fb_buf_flush();
         scr->position_x += 8;
         scr->position_x -= scr->position_x % 8;
         break;
     case '\b':
-        fb_buf_flush();
         if (scr->position_x == 0)
             break;
         scr->position_x--;
         if (console == active_console)
-            prtchr(' ', scr->position_y, scr->position_x);
+            cell_mark_changed(scr->position_y, scr->position_x);
         screenbuffer_putchar(scr, ' ');
         break;
     default:
         if (console == active_console)
-            prtchr(key, scr->position_y, scr->position_x);
+            cell_mark_changed(scr->position_y, scr->position_x);
         screenbuffer_putchar(scr, key);
         scr->position_x++;
+    }
     if (scr->position_x >= scr->size_x) {
-        fb_buf_flush();
         flush_cursor = true;
         scr->position_y++;
+    }
     if (scr->position_y >= scr->size_y) {
+        fb_pending_flush();
         scr->position_y = scr->size_y - 1;
         screenbuffer_clear_line(scr, scr->top_line);
         scr->top_line = (scr->top_line + 1) % scr->size_y;
         if (console == active_console)
             async_msg_1(fb_info.phone, FB_SCROLL, 1);
     attrs_t *attrs;
     if (newcons == active_console)
         return;
-    fb_buf_flush();
+    fb_pending_flush();
     if (newcons == KERNEL_CONSOLE) {
         async_serialize_start();
         curs_hide_sync();
         gcons_in_kernel();
         conn = &connections[active_console];
         set_attrs(&conn->screenbuffer.attrs);
         curs_visibility(false);
         if (interbuffer) {
-            for (i = 0; i < conn->screenbuffer.size_x; i++)
+            for (j = 0; j < conn->screenbuffer.size_y; j++) {
-                for (j = 0; j < conn->screenbuffer.size_y; j++) {
+                for (i = 0; i < conn->screenbuffer.size_x; i++) {
                     unsigned int size_x;
                     size_x = conn->screenbuffer.size_x;
-                    interbuffer[i + j * size_x] =
+                    interbuffer[j * size_x + i] =
                         *get_field_at(&conn->screenbuffer, i, j);
+                }
+            }
             /* This call can preempt, but we are already at the end */
-            rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);
+            rc = async_req_4_0(fb_info.phone, FB_DRAW_TEXT_DATA,
+, 0, conn->screenbuffer.size_x,
+                conn->screenbuffer.size_y);
+        }
         if ((!interbuffer) || (rc != 0)) {
             set_attrs(&conn->screenbuffer.attrs);
             clrscr();
                     if ((field->character == ' ') &&
                         (attrs_same(field->attrs,
                         conn->screenbuffer.attrs)))
                         continue;
-                    prtchr(field->character, j, i);
+                    fb_putchar(field->character, j, i);
+                }
+        }
         curs_goto(conn->screenbuffer.position_y,
             conn->screenbuffer.position_x);
     ipc_callid_t callid;
     ipc_call_t call;
     int consnum;
     ipcarg_t arg1, arg2, arg3, arg4;
     connection_t *conn;
+    screenbuffer_t *scr;
     if ((consnum = find_free_connection()) == -1) {
         ipc_answer_0(iid, ELIMIT);
         return;
+    }
             screenbuffer_clear(&conn->screenbuffer);
             break;
         case CONSOLE_GOTO:
-            fb_buf_flush();
             screenbuffer_goto(&conn->screenbuffer,
                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
             if (consnum == active_console)
                 curs_goto(IPC_GET_ARG1(call),
                     IPC_GET_ARG2(call));
         case CONSOLE_GETSIZE:
             arg1 = fb_info.rows;
             arg2 = fb_info.cols;
             break;
         case CONSOLE_FLUSH:
-            fb_buf_flush();
+            fb_pending_flush();
-            if (consnum == active_console)
+            if (consnum == active_console) {
                 async_req_0_0(fb_info.phone, FB_FLUSH);
+                scr = &(connections[consnum].screenbuffer);
+                curs_goto(scr->position_y, scr->position_x);
+            }
             break;
         case CONSOLE_SET_STYLE:
-            fb_buf_flush();
+            fb_pending_flush();
             arg1 = IPC_GET_ARG1(call);
             screenbuffer_set_style(&conn->screenbuffer, arg1);
             if (consnum == active_console)
                 set_style(arg1);
             break;
         case CONSOLE_SET_COLOR:
-            fb_buf_flush();
+            fb_pending_flush();
             arg1 = IPC_GET_ARG1(call);
             arg2 = IPC_GET_ARG2(call);
             arg3 = IPC_GET_ARG3(call);
             screenbuffer_set_color(&conn->screenbuffer, arg1,
                 arg2, arg3);
             if (consnum == active_console)
                 set_color(arg1, arg2, arg3);
             break;
         case CONSOLE_SET_RGB_COLOR:
-            fb_buf_flush();
+            fb_pending_flush();
             arg1 = IPC_GET_ARG1(call);
             arg2 = IPC_GET_ARG2(call);
             screenbuffer_set_rgb_color(&conn->screenbuffer, arg1,
                 arg2);
             if (consnum == active_console)
                 set_rgb_color(arg1, arg2);
             break;
         case CONSOLE_CURSOR_VISIBILITY:
-            fb_buf_flush();
+            fb_pending_flush();
             arg1 = IPC_GET_ARG1(call);
             conn->screenbuffer.is_cursor_visible = arg1;
             if (consnum == active_console)
                 curs_visibility(arg1);
             break;
     /* Set up shared memory buffer. */
     ib_size = sizeof(keyfield_t) * fb_info.cols * fb_info.rows;
     interbuffer = as_get_mappable_page(ib_size);
+    fb_pending.n = 0;
     if (as_area_create(interbuffer, ib_size, AS_AREA_READ |
         AS_AREA_WRITE | AS_AREA_CACHEABLE) != interbuffer) {
         interbuffer = NULL;
+    }

Subversion Repositories HelenOS

(root)//trunk/uspace/srv/console/console.c – Rev 4164 → 4167