mangavalk/lcdproc
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Write down the steps during rendering.

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This commit is contained in:
mmdolze
2011-01-10 21:30:54 +00:00
parent 6e0b7bca91
commit 4a111252e1
1 changed files with 38 additions and 14 deletions
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server/render.c
+38 -14
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@@ -66,6 +66,22 @@ static int render_scroller(Widget *w, int left, int top, int right, int bottom,
static int render_num(Widget *w, int left, int top, int right, int bottom);
/**
* Renders a screen. The following actions are taken in order:
*
* \li Clear the screen.
* \li Set the backlight.
* \li Set out-of-band data (output).
* \li Render the frame contents.
* \li Set the cursor.
* \li Draw the heartbeat.
* \li Show any server message.
* \li Flush all output to screen.
*
* \param s The screen to render.
* \param timer A value increased with every call.
* \return -1 on error, 0 on success.
*/
int
render_screen(Screen *s, long timer)
{
@@ -76,15 +92,18 @@ render_screen(Screen *s, long timer)
if (s == NULL)
return -1;
/* Clear the LCD screen... */
/* 1. Clear the LCD screen... */
drivers_clear();
/* FIXME drivers_backlight --
*
* If the screen's backlight isn't set (default) then we
* inherit the backlight state from the parent client. This allows
* the client to override it's childrens settings.
* The server can also override the clients and screens settings.
/* 2. Set up the backlight */
/*-
* 2.1:
* First we find out who has set the backlight:
* a) the screen,
* b) the client, or
* c) the server core
* with the latter taking precedence over the earlier. If the
* backlight is not set on/off then use the fallback (set it ON).
*/
if (backlight != BACKLIGHT_OPEN) {
tmp_state = backlight;
@@ -99,7 +118,11 @@ render_screen(Screen *s, long timer)
tmp_state = backlight_fallback;
}
/* Set up backlight to the correct state... */
/*-
* 2.2:
* If one of the backlight options (FLASH or BLINK) has been set turn
* it on/off based on a timed algorithm.
*/
/* NOTE: dirty stripping of other options... */
/* Backlight flash: check timer and flip backlight as appropriate */
if (tmp_state & BACKLIGHT_FLASH) {
@@ -122,17 +145,18 @@ render_screen(Screen *s, long timer)
drivers_backlight(tmp_state & BACKLIGHT_ON);
}
/* Output ports from LCD - outputs depend on the current screen */
/* 3. Output ports from LCD - outputs depend on the current screen */
drivers_output(output_state);
/* Draw a frame... */
/* 4. Draw a frame... */
render_frame(s->widgetlist, 0, 0,
display_props->width, display_props->height,
s->width, s->height, 'v', max(s->duration / s->height, 1), timer);
/* Set the cursor */
/* 5. Set the cursor */
drivers_cursor(s->cursor_x, s->cursor_y, s->cursor);
/* 6. Set the heartbeat */
if (heartbeat != HEARTBEAT_OPEN) {
tmp_state = heartbeat;
}
@@ -147,7 +171,7 @@ render_screen(Screen *s, long timer)
}
drivers_heartbeat(tmp_state);
/* If there is an server message that is not expired, display it */
/* 7. If there is an server message that is not expired, display it */
if (server_msg_expire > 0) {
drivers_string(display_props->width - strlen(server_msg_text) + 1,
display_props->height, server_msg_text);
@@ -157,7 +181,7 @@ render_screen(Screen *s, long timer)
}
}
/* flush display out, frame and all... */
/* 8. Flush display out, frame and all... */
drivers_flush();
debug(RPT_DEBUG, "==== END RENDERING ====");
@@ -204,7 +228,7 @@ render_frame(LinkedList *list,
fy = max(fy, 0); // safeguard against negative values
debug(RPT_DEBUG, "%s: fy=%d", __FUNCTION__, fy);
}
}
}
else if (fscroll == 'h') { /* horizontal scrolling */
/* TODO: Frames don't scroll horizontally yet! */