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rockbox/apps/screen_access.c
Jonathan Gordon 2c71aa9feb lcd/skin_engine: Add the ability to draw onto the backdrop layer 
The framebuffer the lcd driver uses can now be changed on the fly
which means that regular lcd_* drawing functions can draw onto the
"backdrop" buffer. The skin engine can use this to create layered
effects.

Add the tag %VB to a viewport to draw that viewport onto the
backdrop layer. If you want to draw an image onto the backdrop
framebuffer use %x(backdrop filename) instead of %X() inside
a viewport with %VB.

Change-Id: I741498e2af6d4f2d78932cabe8942317893e7cfc
2012-02-28 23:03:04 +11:00

378 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Kevin Ferrare
*
* 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 <stdio.h>
#include "config.h"
#include <lcd.h>
#ifdef HAVE_REMOTE_LCD
#include <lcd-remote.h>
#endif
#include <scroll_engine.h>
#include <font.h>
#include <button.h>
#include <settings.h>
#include <kernel.h>
#include <icons.h>
#include "backlight.h"
#include "screen_access.h"
#include "backdrop.h"
/* some helper functions to calculate metrics on the fly */
static int screen_helper_getcharwidth(void)
{
#ifdef HAVE_LCD_BITMAP
return font_get(lcd_getfont())->maxwidth;
#else
return 1;
#endif
}
static int screen_helper_getcharheight(void)
{
#ifdef HAVE_LCD_BITMAP
return font_get(lcd_getfont())->height;
#else
return 1;
#endif
}
static int screen_helper_getnblines(void)
{
int height=screens[0].lcdheight;
#ifdef HAVE_LCD_BITMAP
if(global_settings.statusbar != STATUSBAR_OFF)
height -= STATUSBAR_HEIGHT;
#ifdef HAVE_BUTTONBAR
if(global_settings.buttonbar && screens[0].has_buttonbar)
height -= BUTTONBAR_HEIGHT;
#endif
#endif
return height / screens[0].getcharheight();
}
void screen_helper_setfont(int font)
{
(void)font;
#ifdef HAVE_LCD_BITMAP
if (font == FONT_UI)
font = global_status.font_id[SCREEN_MAIN];
lcd_setfont(font);
#endif
}
#ifdef HAVE_LCD_BITMAP
static int screen_helper_getuifont(void)
{
return global_status.font_id[SCREEN_MAIN];
}
static void screen_helper_setuifont(int font)
{
global_status.font_id[SCREEN_MAIN] = font;
}
#endif
#if NB_SCREENS == 2
static int screen_helper_remote_getcharwidth(void)
{
#ifdef HAVE_LCD_BITMAP
return font_get(lcd_remote_getfont())->maxwidth;
#else
return 1;
#endif
}
static int screen_helper_remote_getcharheight(void)
{
#ifdef HAVE_LCD_BITMAP
return font_get(lcd_remote_getfont())->height;
#else
return 1;
#endif
}
static int screen_helper_remote_getnblines(void)
{
int height=screens[1].lcdheight;
#ifdef HAVE_LCD_BITMAP
if(global_settings.statusbar != STATUSBAR_OFF)
height -= STATUSBAR_HEIGHT;
#ifdef HAVE_BUTTONBAR
if(global_settings.buttonbar && screens[1].has_buttonbar)
height -= BUTTONBAR_HEIGHT;
#endif
#endif
return height / screens[1].getcharheight();
}
void screen_helper_remote_setfont(int font)
{
if (font == FONT_UI)
font = global_status.font_id[SCREEN_REMOTE];
lcd_remote_setfont(font);
}
static int screen_helper_remote_getuifont(void)
{
#ifdef HAVE_LCD_BITMAP
return global_status.font_id[SCREEN_REMOTE];
#else
return FONT_SYSFIXED;
#endif
}
static void screen_helper_remote_setuifont(int font)
{
#ifdef HAVE_LCD_BITMAP
global_status.font_id[SCREEN_REMOTE] = font;
#endif
}
#endif
struct screen screens[NB_SCREENS] =
{
{
.screen_type=SCREEN_MAIN,
.lcdwidth=LCD_WIDTH,
.lcdheight=LCD_HEIGHT,
.depth=LCD_DEPTH,
.getnblines=&screen_helper_getnblines,
#if defined(HAVE_LCD_COLOR)
.is_color=true,
#else
.is_color=false,
#endif
#ifdef HAVE_LCD_BITMAP
.pixel_format=LCD_PIXELFORMAT,
#endif
.getcharwidth=screen_helper_getcharwidth,
.getcharheight=screen_helper_getcharheight,
#if (CONFIG_LED == LED_VIRTUAL)
.has_disk_led=false,
#elif defined(HAVE_REMOTE_LCD)
.has_disk_led=true,
#endif
.set_viewport=&lcd_set_viewport,
.getwidth=&lcd_getwidth,
.getheight=&lcd_getheight,
.getstringsize=&lcd_getstringsize,
#ifdef HAVE_LCD_BITMAP
.setfont=screen_helper_setfont,
.getuifont=screen_helper_getuifont,
.setuifont=screen_helper_setuifont,
.mono_bitmap=&lcd_mono_bitmap,
.mono_bitmap_part=&lcd_mono_bitmap_part,
.set_drawmode=&lcd_set_drawmode,
.bitmap=(screen_bitmap_func*)&lcd_bitmap,
.bitmap_part=(screen_bitmap_part_func*)&lcd_bitmap_part,
#if LCD_DEPTH <= 2
/* No transparency yet for grayscale and mono lcd */
.transparent_bitmap=(screen_bitmap_func*)&lcd_bitmap,
.transparent_bitmap_part=(screen_bitmap_part_func*)&lcd_bitmap_part,
#else
.transparent_bitmap=(screen_bitmap_func*)&lcd_bitmap_transparent,
.transparent_bitmap_part=(screen_bitmap_part_func*)&lcd_bitmap_transparent_part,
#endif
.bmp = &lcd_bmp,
.bmp_part = &lcd_bmp_part,
#if LCD_DEPTH > 1
#if defined(HAVE_LCD_COLOR) && defined(LCD_REMOTE_DEPTH) && LCD_REMOTE_DEPTH > 1
.color_to_native=&lcd_color_to_native,
#endif
.get_background=&lcd_get_background,
.get_foreground=&lcd_get_foreground,
.set_background=&lcd_set_background,
.set_foreground=&lcd_set_foreground,
#ifdef HAVE_LCD_COLOR
.set_selector_start=&lcd_set_selector_start,
.set_selector_end=&lcd_set_selector_end,
.set_selector_text=&lcd_set_selector_text,
#endif
#endif /* LCD_DEPTH > 1 */
.update_rect=&lcd_update_rect,
.update_viewport_rect=&lcd_update_viewport_rect,
.fillrect=&lcd_fillrect,
.drawrect=&lcd_drawrect,
.draw_border_viewport=&lcd_draw_border_viewport,
.fill_viewport=&lcd_fill_viewport,
.drawpixel=&lcd_drawpixel,
.drawline=&lcd_drawline,
.vline=&lcd_vline,
.hline=&lcd_hline,
.scroll_step=&lcd_scroll_step,
.puts_style_offset=&lcd_puts_style_offset,
.puts_style_xyoffset=&lcd_puts_style_xyoffset,
.puts_scroll_style=&lcd_puts_scroll_style,
.puts_scroll_style_offset=&lcd_puts_scroll_style_offset,
.puts_scroll_style_xyoffset=&lcd_puts_scroll_style_xyoffset,
#endif /* HAVE_LCD_BITMAP */
#ifdef HAVE_LCD_CHARCELLS
.double_height=&lcd_double_height,
.putchar=&lcd_putc,
.get_locked_pattern=&lcd_get_locked_pattern,
.define_pattern=&lcd_define_pattern,
.unlock_pattern=&lcd_unlock_pattern,
.icon=&lcd_icon,
#endif /* HAVE_LCD_CHARCELLS */
.putsxy=&lcd_putsxy,
.puts=&lcd_puts,
.putsf=&lcd_putsf,
.puts_offset=&lcd_puts_offset,
.puts_scroll=&lcd_puts_scroll,
.puts_scroll_offset=&lcd_puts_scroll_offset,
.scroll_speed=&lcd_scroll_speed,
.scroll_delay=&lcd_scroll_delay,
.stop_scroll=&lcd_stop_scroll,
.clear_display=&lcd_clear_display,
.clear_viewport=&lcd_clear_viewport,
.scroll_stop=&lcd_scroll_stop,
.scroll_stop_line=&lcd_scroll_stop_line,
.update=&lcd_update,
.update_viewport=&lcd_update_viewport,
.backlight_on=&backlight_on,
.backlight_off=&backlight_off,
.is_backlight_on=&is_backlight_on,
.backlight_set_timeout=&backlight_set_timeout,
#if LCD_DEPTH > 1
.backdrop_load=&backdrop_load,
.backdrop_show=&backdrop_show,
#endif
#ifdef HAVE_BUTTONBAR
.has_buttonbar=false,
#endif
#if defined(HAVE_LCD_BITMAP)
.set_framebuffer = (void*)lcd_set_framebuffer,
#endif
},
#if NB_SCREENS == 2
{
.screen_type=SCREEN_REMOTE,
.lcdwidth=LCD_REMOTE_WIDTH,
.lcdheight=LCD_REMOTE_HEIGHT,
.depth=LCD_REMOTE_DEPTH,
.getnblines=&screen_helper_remote_getnblines,
.is_color=false,/* No color remotes yet */
.pixel_format=LCD_REMOTE_PIXELFORMAT,
.getcharwidth=screen_helper_remote_getcharwidth,
.getcharheight=screen_helper_remote_getcharheight,
.has_disk_led=false,
.set_viewport=&lcd_remote_set_viewport,
.getwidth=&lcd_remote_getwidth,
.getheight=&lcd_remote_getheight,
.getstringsize=&lcd_remote_getstringsize,
#if 1 /* all remote LCDs are bitmapped so far */
.setfont=screen_helper_remote_setfont,
.getuifont=screen_helper_remote_getuifont,
.setuifont=screen_helper_remote_setuifont,
.mono_bitmap=&lcd_remote_mono_bitmap,
.mono_bitmap_part=&lcd_remote_mono_bitmap_part,
.bitmap=(screen_bitmap_func*)&lcd_remote_bitmap,
.bitmap_part=(screen_bitmap_part_func*)&lcd_remote_bitmap_part,
.set_drawmode=&lcd_remote_set_drawmode,
#if LCD_REMOTE_DEPTH <= 2
/* No transparency yet for grayscale and mono lcd */
.transparent_bitmap=(screen_bitmap_func*)&lcd_remote_bitmap,
.transparent_bitmap_part=(screen_bitmap_part_func*)&lcd_remote_bitmap_part,
/* No colour remotes yet */
#endif
.bmp = &lcd_remote_bmp,
.bmp_part = &lcd_remote_bmp_part,
#if LCD_REMOTE_DEPTH > 1
#if defined(HAVE_LCD_COLOR)
.color_to_native=&lcd_remote_color_to_native,
#endif
.get_background=&lcd_remote_get_background,
.get_foreground=&lcd_remote_get_foreground,
.set_background=&lcd_remote_set_background,
.set_foreground=&lcd_remote_set_foreground,
#endif /* LCD_REMOTE_DEPTH > 1 */
.update_rect=&lcd_remote_update_rect,
.update_viewport_rect=&lcd_remote_update_viewport_rect,
.fillrect=&lcd_remote_fillrect,
.drawrect=&lcd_remote_drawrect,
.draw_border_viewport=&lcd_remote_draw_border_viewport,
.fill_viewport=&lcd_remote_fill_viewport,
.drawpixel=&lcd_remote_drawpixel,
.drawline=&lcd_remote_drawline,
.vline=&lcd_remote_vline,
.hline=&lcd_remote_hline,
.scroll_step=&lcd_remote_scroll_step,
.puts_style_offset=&lcd_remote_puts_style_offset,
.puts_style_xyoffset=&lcd_remote_puts_style_xyoffset,
.puts_scroll_style=&lcd_remote_puts_scroll_style,
.puts_scroll_style_offset=&lcd_remote_puts_scroll_style_offset,
.puts_scroll_style_xyoffset=&lcd_remote_puts_scroll_style_xyoffset,
#endif /* 1 */
#if 0 /* no charcell remote LCDs so far */
.double_height=&lcd_remote_double_height,
.putc=&lcd_remote_putc,
.get_locked_pattern=&lcd_remote_get_locked_pattern,
.define_pattern=&lcd_remote_define_pattern,
.icon=&lcd_remote_icon,
#endif /* 0 */
.putsxy=&lcd_remote_putsxy,
.puts=&lcd_remote_puts,
.putsf=&lcd_remote_putsf,
.puts_offset=&lcd_remote_puts_offset,
.puts_scroll=&lcd_remote_puts_scroll,
.puts_scroll_offset=&lcd_remote_puts_scroll_offset,
.scroll_speed=&lcd_remote_scroll_speed,
.scroll_delay=&lcd_remote_scroll_delay,
.stop_scroll=&lcd_remote_stop_scroll,
.clear_display=&lcd_remote_clear_display,
.clear_viewport=&lcd_remote_clear_viewport,
.scroll_stop=&lcd_remote_scroll_stop,
.scroll_stop_line=&lcd_remote_scroll_stop_line,
.update=&lcd_remote_update,
.update_viewport=&lcd_remote_update_viewport,
.backlight_on=&remote_backlight_on,
.backlight_off=&remote_backlight_off,
.is_backlight_on=&is_remote_backlight_on,
.backlight_set_timeout=&remote_backlight_set_timeout,
#if LCD_DEPTH > 1
.backdrop_load=&remote_backdrop_load,
.backdrop_show=&remote_backdrop_show,
#endif
#ifdef HAVE_BUTTONBAR
.has_buttonbar=false,
#endif
#if defined(HAVE_LCD_BITMAP)
.set_framebuffer = (void*)lcd_remote_set_framebuffer,
#endif
}
#endif /* NB_SCREENS == 2 */
};
#ifdef HAVE_LCD_BITMAP
void screen_clear_area(struct screen * display, int xstart, int ystart,
int width, int height)
{
display->set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
display->fillrect(xstart, ystart, width, height);
display->set_drawmode(DRMODE_SOLID);
}
#endif
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