509 lines
15 KiB
C
509 lines
15 KiB
C
/*
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* render.c
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* This file is part of LCDd, the lcdproc server.
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*
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* This file is released under the GNU General Public License. Refer to the
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* COPYING file distributed with this package.
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*
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* Copyright (c) 1999, William Ferrell, Scott Scriven
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* 2001, Joris Robijn
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*
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*
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* Draws screens on the LCD.
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*
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* This needs to be greatly expanded and redone for greater flexibility.
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* For example, it should support multiple screen sizes, more flexible
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* widgets, and multiple simultaneous screens.
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*
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* This will probably take a while to do. :(
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*
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* THIS FILE IS MESSY! Anyone care to rewrite it nicely? Please?? :)
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*
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* NOTE: (from David Douthitt) Multiple screen sizes? Multiple simultaneous
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* screens? Horrors of horrors... next thing you know it'll be making coffee...
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* Better believe it'll take a while to do...
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*
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*/
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#include <string.h>
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#include <stdio.h>
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#include "shared/report.h"
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#include "shared/LL.h"
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#include "drivers/lcd.h"
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#include "screen.h"
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#include "screenlist.h"
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#include "widget.h"
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#include "render.h"
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int heartbeat = HEART_OPEN;
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int backlight = BACKLIGHT_OPEN;
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int backlight_state = BACKLIGHT_OPEN;
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int backlight_brightness = 255;
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int backlight_off_brightness = 0;
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int output_state = 0;
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static int reset;
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#define BUFSIZE 1024
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static int draw_frame (LinkedList * list, char fscroll, int left, int top, int right, int bottom, int fwid, int fhgt, int fspeed, int timer);
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int
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draw_screen (screen * s, int timer)
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{
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static screen *old_s = NULL;
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int tmp = 0, tmp_state = 0;
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//debug(RPT_DEBUG, "Render...");
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//return 0;
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reset = 1;
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//debug(RPT_DEBUG, "draw_screen: %8x, %i", (int)s, timer);
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if (!s)
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return -1;
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if (s == old_s)
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reset = 0;
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old_s = s;
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// Clear the LCD screen...
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lcd_ptr->clear ();
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// FIXME lcd_ptr->backlight --
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//
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// This should be in a separate function altogether.
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// Perhaps several: lcd_ptr->backlight_off, lcd_ptr->backlight_on,
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// lcd_ptr->backlight_brightness, lcd_ptr->backlight_flash ...
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// If the screen's backlight_state isn't set (default) then we
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// inherit the backlight state from the parent client. This allows
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// the client to override it's childrens settings.
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if (s->backlight_state == BACKLIGHT_NOTSET) {
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if (s->parent) tmp_state = s->parent->backlight_state;
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} else {
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tmp_state = s->backlight_state;
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}
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// Set up backlight to the correct state...
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// NOTE: dirty stripping of other options...
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switch (tmp_state & 1) {
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case BACKLIGHT_OFF:
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lcd_ptr->backlight (BACKLIGHT_OFF);
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break;
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// Backlight on (easy)
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case BACKLIGHT_ON:
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lcd_ptr->backlight (BACKLIGHT_ON);
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break;
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default:
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// Backlight flash: check timer and flip backlight as appropriate
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if (tmp_state & BACKLIGHT_FLASH) {
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tmp = (!((timer & 7) == 7));
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if (tmp_state & 1)
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lcd_ptr->backlight (tmp ? backlight_brightness : backlight_off_brightness);
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//lcd_ptr->backlight(backlight_brightness * (!((timer&7) == 7)));
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else
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lcd_ptr->backlight (!tmp ? backlight_brightness : backlight_off_brightness);
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//lcd_ptr->backlight(backlight_brightness * ((timer&7) == 7));
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// Backlight blink: check timer and flip backlight as appropriate
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} else if (tmp_state & BACKLIGHT_BLINK) {
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tmp = (!((timer & 14) == 14));
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if (tmp_state & 1)
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lcd_ptr->backlight (tmp ? backlight_brightness : backlight_off_brightness);
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//lcd_ptr->backlight(backlight_brightness * (!((timer&14) == 14)));
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else
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lcd_ptr->backlight (!tmp ? backlight_brightness : backlight_off_brightness);
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//lcd_ptr->backlight(backlight_brightness * ((timer&14) == 14));
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}
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break;
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}
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// Output ports from LCD - outputs depend on the current screen
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lcd_ptr->output (output_state);
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// Draw a frame...
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draw_frame (s->widgets, 'v', 0, 0, lcd_ptr->wid, lcd_ptr->hgt, s->wid, s->hgt, (((s->duration / s->hgt) < 1) ? 1 : (s->duration / s->hgt)), timer);
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//debug(RPT_DEBUG, "draw_screen done");
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if (heartbeat) {
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lcd_ptr->heartbeat(s->heartbeat);
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//if ((s->heartbeat == HEART_ON) || heartbeat == HEART_ON) {
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// Set this to pulsate like a real heart beat...
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// (binary is fun... :)
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// lcd_ptr->heartbeat ();
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//lcd_ptr->icon (!((timer + 4) & 5), 0);
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//lcd_ptr->chr (lcd_ptr->wid, 1, 0);
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//}
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// else
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// This seems unnecessary... heartbeat is nicer...
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// if ((s->heartbeat == HEART_OPEN) && heartbeat != HEART_OFF) {
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// char *phases = "-\\|/";
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// lcd_ptr->chr (lcd_ptr->wid, 1, phases[timer & 3]);
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// }
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}
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// flush display out, frame and all...
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lcd_ptr->flush ();
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//debug(RPT_DEBUG, "draw_screen: %8x, %i", s, timer);
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return 0;
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}
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// The following function is positively ghastly (as was mentioned above!)
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// Best thing to do is to remove support for frames... but anyway...
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//
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static int
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draw_frame (LinkedList * list,
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char fscroll, // direction of scrolling
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int left, // left edge of frame
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int top, // top edge of frame
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int right, // right edge of frame
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int bottom, // bottom edge of frame
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int fwid, // frame width?
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int fhgt, // frame height?
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int fspeed, // speed of scrolling...
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int timer) // ?
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{
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#define VerticalScrolling (fscroll == 'v')
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#define HorizontalScrolling (fscroll == 'h')
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char str[BUFSIZE]; // scratch buffer
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widget *w;
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int wid, hgt; // Width and height of visible frame area
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int x, y;
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int fx, fy; // Scrolling offset for the frame...
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int length, speed;
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//int lines;
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int reset = 1;
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wid = right - left; // This is the size of the visible frame area
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hgt = bottom - top;
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fx = 0;
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fy = 0;
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if (VerticalScrolling) {
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if (fspeed > 0)
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fy = (timer - fspeed) / fspeed;
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else if (fspeed < 0)
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fy = (-fspeed) * timer;
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if (fy < 0)
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fy = 0;
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// Make sure the whole frame gets displayed, at least...
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// ...by setting the action to RENDER_HOLD if no other action
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// is currently defined...
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if (!screenlist_action)
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screenlist_action = RENDER_HOLD;
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if ((fy) > fhgt - 1) {
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// Release hold after it has been displayed
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if (!screenlist_action || screenlist_action == RENDER_HOLD)
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screenlist_action = 0;
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}
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fy %= fhgt;
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if (fy > fhgt - hgt)
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fy = fhgt - hgt;
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} else if (HorizontalScrolling) {
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// TODO: Frames don't scroll horizontally yet!
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}
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//debug(RPT_DEBUG, "draw_screen: %8x, %i", s, timer);
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if (!list)
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return -1;
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//debug(RPT_DEBUG, "draw_frame: %8x, %i", frame, timer);
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#define PositiveX(a) ((a)->x > 0)
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#define PositiveY(a) ((a)->y > 0)
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#define ValidPoint(a) (PositiveX(a) && PositiveY(a))
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#define TextPresent(a) ((a)->text)
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LL_Rewind (list);
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do {
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w = (widget *) LL_Get (list);
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if (!w)
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return -1;
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// TODO: Make this cleaner and more flexible!
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switch (w->type) {
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case WID_STRING:
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if (ValidPoint(w) && TextPresent(w)) {
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if ((w->y <= hgt + fy) && (w->y > fy)) {
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if (w->x > wid) w->x=wid;
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strncpy (str, w->text, wid - w->x + 1);
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str[wid - w->x + 1] = 0;
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lcd_ptr->string (w->x + left, w->y + top - fy, str);
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}
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}
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break;
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case WID_HBAR:
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if (reset) {
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lcd_ptr->init_hbar ();
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reset = 0;
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}
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if ((w->x > 0) && (w->y > 0)) {
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if ((w->y <= hgt + fy) && (w->y > fy)) {
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if (w->length > 0) {
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if ((w->length / lcd_ptr->cellwid) < wid - w->x + 1)
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lcd_ptr->hbar (w->x + left, w->y + top - fy, w->length);
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else
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lcd_ptr->hbar (w->x + left, w->y + top - fy, wid * lcd_ptr->cellwid);
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} else if (w->length < 0) {
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// TODO: Rearrange stuff to get left-extending
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// hbars to draw correctly...
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// .. er, this'll require driver modifications,
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// so I'll leave it out for now.
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}
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}
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}
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break;
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case WID_VBAR: // FIXME: Vbars don't work in frames!
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if (reset) {
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lcd_ptr->init_vbar ();
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reset = 0;
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}
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if ((w->x > 0) && (w->y > 0)) {
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if (w->length > 0) {
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lcd_ptr->vbar (w->x, w->length);
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} else if (w->length < 0) {
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// TODO: Rearrange stuff to get down-extending
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// vbars to draw correctly...
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// .. er, this'll require driver modifications,
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// so I'll leave it out for now.
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}
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}
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break;
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case WID_ICON: // FIXME: Not implemented
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break;
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case WID_TITLE: // FIXME: Doesn't work quite right in frames...
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if (!w->text)
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break;
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if (wid < 8)
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break;
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memset (str, 255, wid);
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str[2] = ' ';
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length = strlen (w->text);
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if (length <= wid - 6) {
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memcpy (str + 3, w->text, length);
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str[length + 3] = ' ';
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} else // Scroll the title, if it doesn't fit...
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{
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speed = 1;
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x = timer / speed;
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y = x / length;
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// Make sure the whole title gets displayed, at least...
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if (!screenlist_action)
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screenlist_action = RENDER_HOLD;
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if (x > length - 6) {
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// Release hold after it has been displayed
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if (!screenlist_action || screenlist_action == RENDER_HOLD)
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screenlist_action = 0;
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}
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x %= (length);
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x -= 3;
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if (x < 0)
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x = 0;
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if (x > length - (wid - 6))
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x = length - (wid - 6);
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if (y & 1) // Scrolling backwards...
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{
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x = (length - (wid - 6)) - x;
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}
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strncpy (str + 3, w->text + x, (wid - 6));
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str[wid - 3] = ' ';
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}
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str[wid] = 0;
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lcd_ptr->string (1 + left, 1 + top, str);
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break;
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case WID_SCROLLER: // FIXME: doesn't work in frames...
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{
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int offset;
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int screen_width;
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if (!w->text)
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break;
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if (w->right < w->left)
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break;
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//printf(RPT_DEBUG, "rendering: %s %d",w->text,timer);
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screen_width = w->right - w->left + 1;
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switch (w->length) { // actually, direction...
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// FIXED: Horz scrollers don't show the
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// last letter in the string... (1-off error?)
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case 'h':
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length = strlen (w->text) + 1;
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if (length <= screen_width) {
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/* it fits within the box, just render it */
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lcd_ptr->string (w->left, w->top, w->text);
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} else {
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int effLength = length - screen_width;
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int necessaryTimeUnits = 0;
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if (!screenlist_action)
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screenlist_action = RENDER_HOLD;
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if (w->speed > 0) {
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necessaryTimeUnits = effLength * w->speed;
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if (((timer / (effLength * w->speed)) % 2) == 0) {
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//wiggle one way
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offset = (timer % (effLength * w->speed))
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/ w->speed;
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} else {
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//wiggle the other
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offset = (((timer % (effLength * w->speed))
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- (effLength * w->speed) + 1)
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/ w->speed) * -1;
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}
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} else if (w->speed < 0) {
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necessaryTimeUnits = effLength / (w->speed * -1);
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if (((timer / (effLength / (w->speed * -1))) % 2) == 0) {
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offset = (timer % (effLength / (w->speed * -1)))
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* w->speed * -1;
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} else {
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offset = (((timer % (effLength / (w->speed * -1)))
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* w->speed * -1) - effLength + 1) * -1;
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}
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} else {
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offset = 0;
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if (screenlist_action == RENDER_HOLD)
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screenlist_action = 0;
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}
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if (timer > necessaryTimeUnits) {
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if (screenlist_action == RENDER_HOLD)
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screenlist_action = 0;
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}
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if (offset <= length) {
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strncpy (str, &((w->text)[offset]), screen_width);
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str[screen_width] = '\0';
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//debug(RPT_DEBUG, "scroller %s : %d", str, length-offset);
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} else {
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str[0] = '\0';
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}
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lcd_ptr->string (w->left, w->top, str);
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}
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break;
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// FIXME: Vert scrollers don't always seem to scroll
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// back up after hitting the bottom. They jump back to
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// the top instead... (nevermind?)
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case 'v':
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{
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int i = 0;
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length = strlen (w->text);
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if (length <= screen_width) {
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/* no scrolling required... */
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lcd_ptr->string (w->left, w->top, w->text);
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} else {
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int lines_required = (length / screen_width)
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+ (length % screen_width ? 1 : 0);
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int available_lines = (w->bottom - w->top + 1);
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if (lines_required <= available_lines) {
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// easy...
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for (i = 0; i < lines_required; i++) {
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strncpy (str, &((w->text)[i * screen_width]), screen_width);
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str[screen_width] = '\0';
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lcd_ptr->string (w->left, w->top + i, str);
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}
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} else {
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int necessaryTimeUnits = 0;
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int effLines = lines_required - available_lines + 1;
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int begin = 0;
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if (!screenlist_action)
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screenlist_action = RENDER_HOLD;
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//debug(RPT_DEBUG, "length: %d sw: %d lines req: %d avail lines: %d effLines: %d ",length,screen_width,lines_required,available_lines,effLines);
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if (w->speed > 0) {
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necessaryTimeUnits = effLines * w->speed;
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if (((timer / (effLines * w->speed)) % 2) == 0) {
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//debug(RPT_DEBUG, "up ");
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begin = (timer % (effLines * w->speed))
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/ w->speed;
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} else {
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//debug(RPT_DEBUG, "down ");
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begin = (((timer % (effLines * w->speed))
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- (effLines * w->speed) + 1) / w->speed)
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* -1;
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}
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} else if (w->speed < 0) {
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necessaryTimeUnits = effLines / (w->speed * -1);
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if (((timer / (effLines / (w->speed * -1))) % 2) == 0) {
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begin = (timer % (effLines / (w->speed * -1)))
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* w->speed * -1;
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} else {
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begin = (((timer % (effLines / (w->speed * -1)))
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* w->speed * -1) - effLines + 1)
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* -1;
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}
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} else {
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begin = 0;
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}
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//debug(RPT_DEBUG, "rendering begin: %d timer: %d effLines: %d",begin,timer,effLines);
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for (i = begin; i < begin + available_lines; i++) {
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strncpy (str, &((w->text)[i * (screen_width)]), screen_width);
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str[screen_width] = '\0';
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//debug(RPT_DEBUG, "rendering: '%s' of %s",
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//str,w->text);
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lcd_ptr->string (w->left, w->top + (i - begin), str);
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}
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if (timer > necessaryTimeUnits) {
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if (screenlist_action == RENDER_HOLD)
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screenlist_action = 0;
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}
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}
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}
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break;
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}
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}
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break;
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}
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case WID_FRAME:
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{
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// FIXME: doesn't handle nested frames quite right!
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// doesn't handle scrolling in nested frames at all...
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int new_left, new_top, new_right, new_bottom;
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new_left = left + w->left - 1;
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new_top = top + w->top - 1;
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new_right = left + w->right;
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new_bottom = top + w->bottom;
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if (new_right > right)
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new_right = right;
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if (new_bottom > bottom)
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new_bottom = bottom;
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if (new_left >= right || new_top >= bottom) { // Do nothing if it's invisible...
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} else {
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draw_frame (w->kids, w->length, new_left, new_top, new_right, new_bottom, w->wid, w->hgt, w->speed, timer);
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}
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}
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break;
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case WID_NUM: // FIXME: doesn't work in frames...
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// NOTE: y=10 means COLON (:)
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if ((w->x > 0) && (w->y >= 0) && (w->y <= 10)) {
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if (reset) {
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lcd_ptr->init_num ();
|
|
reset = 0;
|
|
}
|
|
lcd_ptr->num (w->x + left, w->y);
|
|
}
|
|
break;
|
|
case WID_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
} while (LL_Next (list) == 0);
|
|
|
|
return 0;
|
|
}
|