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rockbox/apps/gui/viewport.c
Christian Soffke 18c8e554fd Eliminate SBS update on WPS exit 
Prevents flashing an outdated backdrop when moving
from WPS to SBS, if both were using the extra
frame buffer (i.e. both used background viewports),
without having to update the SBS first. I think,
this is actually what we want, rather than commit
c1222d65e2, which attempted the same thing.

Change-Id: Iffc7fe2d351ebdf21a4e7629aba93641c0d30b50
2025-03-22 17:23:08 +01:00

347 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Jonathan Gordon
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdlib.h>
#include "config.h"
#include "lcd.h"
#ifdef HAVE_REMOTE_LCD
#include "lcd-remote.h"
#endif
#include "font.h"
#include "viewport.h"
#include "screen_access.h"
#include "settings.h"
#include "misc.h"
#include "list.h"
/*some short cuts for fg/bg/line selector handling */
#ifdef HAVE_LCD_COLOR
#define FG_FALLBACK global_settings.fg_color
#define BG_FALLBACK global_settings.bg_color
#else
#define FG_FALLBACK LCD_DEFAULT_FG
#define BG_FALLBACK LCD_DEFAULT_BG
#endif
#ifdef HAVE_REMOTE_LCD
#define REMOTE_FG_FALLBACK LCD_REMOTE_DEFAULT_FG
#define REMOTE_BG_FALLBACK LCD_REMOTE_DEFAULT_BG
#endif
/* all below isn't needed for pc tools (i.e. checkwps/wps editor)
* only viewport_parse_viewport() is */
#ifndef __PCTOOL__
#include "string.h"
#include "kernel.h"
#include "system.h"
#include "statusbar.h"
#include "appevents.h"
#include "panic.h"
#include "language.h"
#include "statusbar-skinned.h"
#include "skin_engine/skin_engine.h"
#include "skin_engine/wps_internals.h"
#include "debug.h"
#define VPSTACK_DEPTH 16
struct viewport_stack_item
{
struct viewport* vp;
bool enabled;
};
static void viewportmanager_redraw(unsigned short id, void* data);
static int theme_stack_top[NB_SCREENS]; /* the last item added */
static struct viewport_stack_item theme_stack[NB_SCREENS][VPSTACK_DEPTH];
static bool is_theme_enabled(enum screen_type screen);
static void evt_toggle(bool enable, unsigned short id,
void (*handler)(unsigned short id, void *data))
{
if (enable)
add_event(id, handler);
else
remove_event(id, handler);
}
static void toggle_events(bool enable)
{
evt_toggle(enable, GUI_EVENT_ACTIONUPDATE, viewportmanager_redraw);
evt_toggle(enable, PLAYBACK_EVENT_TRACK_CHANGE, do_sbs_update_callback);
evt_toggle(enable, PLAYBACK_EVENT_NEXTTRACKID3_AVAILABLE, do_sbs_update_callback);
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
evt_toggle(enable, LCD_EVENT_ACTIVATION, do_sbs_update_callback);
#endif
}
static void set_clear_update_valid_vp(enum screen_type screen, struct viewport *vp)
{
if (vp->width && vp->height)
{
screens[screen].set_viewport(vp);
screens[screen].clear_viewport();
screens[screen].update_viewport();
}
}
static void toggle_theme(enum screen_type screen, bool force)
{
bool enable_event = false;
static bool was_enabled[NB_SCREENS] = {false};
static bool after_boot[NB_SCREENS] = {false};
struct viewport *last_vp;
FOR_NB_SCREENS(i)
{
enable_event = enable_event || is_theme_enabled(i);
sb_set_title_text(NULL, Icon_NOICON, i);
}
toggle_events(enable_event);
if (is_theme_enabled(screen))
{
last_vp = screens[screen].set_viewport(NULL);
bool first_boot = theme_stack_top[screen] == 0;
/* remove the left overs from the previous screen.
* could cause a tiny flicker. Redo your screen code if that happens */
#ifdef HAVE_BACKDROP_IMAGE
int backdrop_id = sb_get_backdrop(screen);
if (get_current_activity() == ACTIVITY_WPS)
{
struct wps_data *sbs = skin_get_gwps(CUSTOM_STATUSBAR, screen)->data;
struct wps_data *wps = skin_get_gwps(WPS, screen)->data;
/* Extra framebuffer shared between WPS and SBS;
prevents flashing previous backdrop: */
if (wps->use_extra_framebuffer && sbs->use_extra_framebuffer)
backdrop_id = -1;
}
skin_backdrop_show(backdrop_id);
#endif
if (LIKELY(after_boot[screen]) && (!was_enabled[screen] || force))
{
struct viewport deadspace, user;
viewport_set_defaults(&user, screen);
deadspace = user; /* get colours and everything */
/* above */
deadspace.x = 0;
deadspace.y = 0;
deadspace.width = screens[screen].lcdwidth;
deadspace.height = user.y;
set_clear_update_valid_vp(screen, &deadspace);
/* below */
deadspace.y = user.y + user.height;
deadspace.height = screens[screen].lcdheight - deadspace.y;
set_clear_update_valid_vp(screen, &deadspace);
/* left */
deadspace.x = 0;
deadspace.y = 0;
deadspace.width = user.x;
deadspace.height = screens[screen].lcdheight;
set_clear_update_valid_vp(screen, &deadspace);
/* below */
deadspace.x = user.x + user.width;
deadspace.width = screens[screen].lcdwidth - deadspace.x;
set_clear_update_valid_vp(screen, &deadspace);
screens[screen].set_viewport(last_vp);
}
intptr_t force = first_boot?0:1;
send_event(GUI_EVENT_ACTIONUPDATE, (void*)force);
}
else
{
#if LCD_DEPTH > 1 || (defined(LCD_REMOTE_DEPTH) && LCD_REMOTE_DEPTH > 1)
screens[screen].backdrop_show(NULL);
#endif
screens[screen].scroll_stop();
skinlist_set_cfg(screen, NULL);
}
/* let list initialize viewport in case viewport dimensions is changed. */
send_event(GUI_EVENT_THEME_CHANGED, NULL);
FOR_NB_SCREENS(i)
was_enabled[i] = is_theme_enabled(i);
#ifdef HAVE_TOUCHSCREEN
sb_bypass_touchregions(!is_theme_enabled(SCREEN_MAIN));
#endif
after_boot[screen] = true;
}
void viewportmanager_theme_enable(enum screen_type screen, bool enable,
struct viewport *viewport)
{
int top = ++theme_stack_top[screen];
if (top >= VPSTACK_DEPTH-1)
panicf("Stack overflow... viewportmanager");
theme_stack[screen][top].enabled = enable;
theme_stack[screen][top].vp = viewport;
toggle_theme(screen, false);
/* then be nice and set the viewport up */
if (viewport)
viewport_set_defaults(viewport, screen);
}
void viewportmanager_theme_undo(enum screen_type screen, bool force_redraw)
{
int top = --theme_stack_top[screen];
if (top < 0)
panicf("Stack underflow... viewportmanager");
toggle_theme(screen, force_redraw);
}
static bool is_theme_enabled(enum screen_type screen)
{
int top = theme_stack_top[screen];
return theme_stack[screen][top].enabled;
}
int viewport_get_nb_lines(const struct viewport *vp)
{
return vp->height/font_get(vp->font)->height;
}
static void viewportmanager_redraw(unsigned short id, void* data)
{
(void)id;
FOR_NB_SCREENS(i)
{
if (is_theme_enabled(i))
sb_skin_update(i, NULL != data);
}
}
void viewportmanager_init(void)
{
FOR_NB_SCREENS(i)
{
theme_stack_top[i] = -1; /* the next call fixes this to 0 */
/* We always want the theme enabled by default... */
viewportmanager_theme_enable(i, true, NULL);
}
}
void viewportmanager_theme_changed(const int which)
{
if (which & THEME_LANGUAGE)
{
}
if (which & (THEME_STATUSBAR|THEME_UI_VIEWPORT))
{
FOR_NB_SCREENS(i)
{
/* This can probably be done better...
* disable the theme so it's forced to do a full redraw */
viewportmanager_theme_enable(i, false, NULL);
viewportmanager_theme_undo(i, true);
}
}
send_event(GUI_EVENT_THEME_CHANGED, NULL);
}
#ifdef HAVE_TOUCHSCREEN
/* check if a point (x and y coordinates) are within a viewport */
bool viewport_point_within_vp(const struct viewport *vp,
const int x, const int y)
{
bool is_x = (x >= vp->x && x < (vp->x + vp->width));
bool is_y = (y >= vp->y && y < (vp->y + vp->height));
return (is_x && is_y);
}
#endif /* HAVE_TOUCHSCREEN */
static void set_default_align_flags(struct viewport *vp)
{
vp->flags &= ~VP_FLAG_ALIGNMENT_MASK;
if (UNLIKELY(lang_is_rtl()))
vp->flags |= VP_FLAG_ALIGN_RIGHT;
}
#endif /* __PCTOOL__ */
void viewport_set_fullscreen(struct viewport *vp,
const enum screen_type screen)
{
screens[screen].init_viewport(vp);
vp->x = 0;
vp->y = 0;
vp->width = screens[screen].lcdwidth;
vp->height = screens[screen].lcdheight;
#ifndef __PCTOOL__
set_default_align_flags(vp);
#endif
vp->font = screens[screen].getuifont();
vp->drawmode = DRMODE_SOLID;
#if LCD_DEPTH > 1
#ifdef HAVE_REMOTE_LCD
/* We only need this test if there is a remote LCD */
if (screen == SCREEN_MAIN)
#endif
{
vp->fg_pattern = FG_FALLBACK;
vp->bg_pattern = BG_FALLBACK;
}
#endif
#if defined(HAVE_REMOTE_LCD) && LCD_REMOTE_DEPTH > 1
if (screen == SCREEN_REMOTE)
{
vp->fg_pattern = LCD_REMOTE_DEFAULT_FG;
vp->bg_pattern = LCD_REMOTE_DEFAULT_BG;
}
#endif
}
void viewport_set_buffer(struct viewport *vp, struct frame_buffer_t *buffer,
const enum screen_type screen)
{
if (!vp) /* NULL vp grabs current framebuffer */
vp = *(screens[screen].current_viewport);
/* NULL sets default buffer */
if (buffer && buffer->elems == 0)
vp->buffer = NULL;
else
vp->buffer = buffer;
screens[screen].init_viewport(vp);
}
void viewport_set_defaults(struct viewport *vp,
const enum screen_type screen)
{
vp->buffer = NULL; /* use default frame_buffer */
vp->flags = VP_DEFAULT_FLAGS;
#if !defined(__PCTOOL__)
struct viewport *sbs_area = NULL;
if (!is_theme_enabled(screen))
{
viewport_set_fullscreen(vp, screen);
return;
}
sbs_area = sb_skin_get_info_vp(screen);
if (sbs_area)
*vp = *sbs_area;
else
#endif /* !__PCTOOL__ */
viewport_set_fullscreen(vp, screen);
}
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