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rockbox/apps/plugins/text_viewer/tv_display.c
Jonathan Gordon aa0f4a4bbe FS#12273 - use buflib for font storage. thanks to the testers :) 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30589 a1c6a512-1295-4272-9138-f99709370657
2011-09-24 13:19:34 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Yoshihisa Uchida
*
* 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 "plugin.h"
#include "tv_display.h"
#include "tv_preferences.h"
/*
* display layout
*
* when is defined HAVE_LCD_BITMAP
* +-------------------------+
* |statusbar (1) |
* +-------------------------+
* |filename (2) |
* +---+---------------------+
* |s | |
* |c | |
* |r | draw area |
* |o | |
* |l | |
* |l | |
* |b | |
* |a | |
* |r | |
* |(3)| |
* +---+---------------------+
* | |scrollbar (4) |
* +---+---------------------+
* |page (5) |
* +-------------------------+
* |statusbar (6) |
* +-------------------------+
*
* (1) displays when rb->global_settings->statusbar == STATUSBAR_TOP.
* (2) displays when preferences->header_mode is HD_PATH.
* (3) displays when preferences->vertical_scrollbar is SB_ON.
* (4) displays when preferences->horizontal_scrollbar is SB_ON.
* (5) displays when preferences->footer_mode is FT_PAGE.
* (6) displays when rb->global_settings->statusbar == STATUSBAR_BOTTOM.
*
*
* when isn't defined HAVE_LCD_BITMAP
* +---+---------------------+
* | | |
* |(7)| draw area |
* | | |
* +---+---------------------+
* (7) bookmark
*/
#define TV_SCROLLBAR_WIDTH rb->global_settings->scrollbar_width
#define TV_SCROLLBAR_HEIGHT 4
#ifndef HAVE_LCD_BITMAP
#define TV_BOOKMARK_ICON 0xe101
#endif
struct tv_rect {
int x;
int y;
int w;
int h;
};
static struct viewport vp_info;
static struct viewport vp_text;
static bool is_initialized_vp = false;
static struct screen* display;
/* layout */
#ifdef HAVE_LCD_BITMAP
static struct tv_rect header;
static struct tv_rect footer;
static struct tv_rect horizontal_scrollbar;
static struct tv_rect vertical_scrollbar;
#else
static struct tv_rect bookmark;
#endif
static bool show_horizontal_scrollbar;
static bool show_vertical_scrollbar;
static int display_columns;
static int display_rows;
static int col_width = 1;
static int row_height = 1;
static int totalsize;
#ifdef HAVE_LCD_BITMAP
static void tv_show_header(void)
{
if (preferences->header_mode)
display->putsxy(header.x, header.y, preferences->file_name);
}
static void tv_show_footer(const struct tv_screen_pos *pos)
{
unsigned char buf[12];
if (preferences->footer_mode)
{
if (pos->line == 0)
rb->snprintf(buf, sizeof(buf), "%d", pos->page + 1);
else
rb->snprintf(buf, sizeof(buf), "%d - %d", pos->page + 1, pos->page + 2);
display->putsxy(footer.x, footer.y + 1, buf);
}
}
static void tv_show_scrollbar(int window, int col, off_t cur_pos, int size)
{
int items;
int min_shown;
int max_shown;
if (show_horizontal_scrollbar)
{
items = preferences->windows * display_columns;
min_shown = window * display_columns + col;
max_shown = min_shown + display_columns;
rb->gui_scrollbar_draw(display,
horizontal_scrollbar.x, horizontal_scrollbar.y + 1,
horizontal_scrollbar.w, TV_SCROLLBAR_HEIGHT,
items, min_shown, max_shown, HORIZONTAL);
}
if (show_vertical_scrollbar)
{
items = (int) totalsize;
min_shown = (int) cur_pos;
max_shown = min_shown + size;
rb->gui_scrollbar_draw(display,
vertical_scrollbar.x, vertical_scrollbar.y,
TV_SCROLLBAR_WIDTH, vertical_scrollbar.h,
items, min_shown, max_shown, VERTICAL);
}
}
#endif
void tv_init_scrollbar(off_t total, bool show_scrollbar)
{
totalsize = total;
show_horizontal_scrollbar = (show_scrollbar && preferences->horizontal_scrollbar);
show_vertical_scrollbar = (show_scrollbar && preferences->vertical_scrollbar);
}
void tv_show_bookmarks(const int *rows, int count)
{
#ifdef HAVE_LCD_BITMAP
display->set_viewport(&vp_text);
display->set_drawmode(DRMODE_COMPLEMENT);
#endif
while (count--)
{
#ifdef HAVE_LCD_BITMAP
display->fillrect(0, rows[count] * row_height,
vp_text.width, row_height);
#else
display->putchar(bookmark.x, bookmark.y + rows[count], TV_BOOKMARK_ICON);
#endif
}
#ifdef HAVE_LCD_BITMAP
display->set_drawmode(DRMODE_SOLID);
display->set_viewport(&vp_info);
#endif
}
void tv_update_extra(int window, int col, const struct tv_screen_pos *pos, int size)
{
#ifdef HAVE_LCD_BITMAP
tv_show_scrollbar(window, col, pos->file_pos, size);
tv_show_header();
tv_show_footer(pos);
#else
(void)window;
(void)col;
(void)pos;
(void)size;
#endif
}
void tv_draw_text(int row, const unsigned char *text, int offset)
{
int xpos = -offset * col_width;
int text_width;
if (row < 0 || row >= display_rows)
return;
if (preferences->alignment == AL_RIGHT)
{
display->getstringsize(text, &text_width, NULL);
xpos += ((offset > 0)? vp_text.width * 2 : vp_text.width) - text_width;
}
display->set_viewport(&vp_text);
#ifdef HAVE_LCD_BITMAP
display->putsxy(xpos, row * row_height, text);
#else
display->puts(xpos, row, text);
#endif
display->set_viewport(&vp_info);
}
void tv_start_display(void)
{
display->set_viewport(&vp_info);
#ifdef HAVE_LCD_BITMAP
display->set_drawmode(DRMODE_SOLID);
#endif
#if LCD_DEPTH > 1
rb->lcd_set_backdrop(NULL);
#endif
display->clear_viewport();
}
void tv_end_display(void)
{
display->update_viewport();
display->set_viewport(NULL);
}
void tv_set_layout(bool show_scrollbar)
{
#ifdef HAVE_LCD_BITMAP
int scrollbar_width = (show_scrollbar && preferences->vertical_scrollbar)?
TV_SCROLLBAR_WIDTH + 1 : 0;
int scrollbar_height = (show_scrollbar && preferences->horizontal_scrollbar)?
TV_SCROLLBAR_HEIGHT + 1 : 0;
row_height = rb->font_get(preferences->font_id)->height;
header.x = 0;
header.y = 0;
header.w = vp_info.width;
header.h = (preferences->header_mode)? row_height + 1 : 0;
footer.x = 0;
footer.w = vp_info.width;
footer.h = (preferences->footer_mode)? row_height + 1 : 0;
footer.y = vp_info.height - footer.h;
horizontal_scrollbar.x = scrollbar_width;
horizontal_scrollbar.y = footer.y - scrollbar_height;
horizontal_scrollbar.w = vp_info.width - scrollbar_width;
horizontal_scrollbar.h = scrollbar_height;
vertical_scrollbar.x = 0;
vertical_scrollbar.y = header.y + header.h;
vertical_scrollbar.w = scrollbar_width;
vertical_scrollbar.h = footer.y - vertical_scrollbar.y - scrollbar_height;
vp_text = vp_info;
vp_text.x += horizontal_scrollbar.x;
vp_text.y += vertical_scrollbar.y;
vp_text.width = horizontal_scrollbar.w;
vp_text.height = vertical_scrollbar.h;
vp_text.font = preferences->font_id;
#else
(void) show_scrollbar;
row_height = 1;
bookmark.x = 0;
bookmark.y = 0;
bookmark.w = 1;
bookmark.h = vp_info.height;
vp_text = vp_info;
vp_text.x += 1;
vp_text.width -= 1;
#endif
display_columns = vp_text.width / col_width;
display_rows = vp_text.height / row_height;
}
void tv_get_drawarea_info(int *width, int *cols, int *rows)
{
*width = vp_text.width;
*cols = display_columns;
*rows = display_rows;
}
static void tv_change_viewport(void)
{
#ifdef HAVE_LCD_BITMAP
bool show_statusbar = preferences->statusbar;
if (is_initialized_vp)
rb->viewportmanager_theme_undo(SCREEN_MAIN, false);
else
is_initialized_vp = true;
rb->viewportmanager_theme_enable(SCREEN_MAIN, show_statusbar, &vp_info);
vp_info.flags &= ~VP_FLAG_ALIGNMENT_MASK;
display->set_viewport(&vp_info);
#else
if (!is_initialized_vp)
{
rb->viewport_set_defaults(&vp_info, SCREEN_MAIN);
is_initialized_vp = true;
}
#endif
}
#ifdef HAVE_LCD_BITMAP
static bool tv_set_font(const unsigned char *font)
{
unsigned char path[MAX_PATH];
if (font != NULL && *font != '\0')
{
rb->snprintf(path, MAX_PATH, "%s/%s.fnt", FONT_DIR, font);
if (preferences->font_id >= 0 &&
(preferences->font_id != rb->global_status->font_id[SCREEN_MAIN]))
rb->font_unload(preferences->font_id);
tv_change_fontid(rb->font_load(path));
if (preferences->font_id < 0)
{
rb->splash(HZ/2, "font load failed");
return false;
}
}
vp_text.font = preferences->font_id;
return true;
}
#endif
static int tv_change_preferences(const struct tv_preferences *oldp)
{
#ifdef HAVE_LCD_BITMAP
static bool font_changing = false;
const unsigned char *font_str;
struct tv_preferences new_prefs;
font_str = (oldp && !font_changing)? oldp->font_name : rb->global_settings->font_file;
/* change font */
if (font_changing || rb->strcmp(font_str, preferences->font_name))
{
if (!tv_set_font(preferences->font_name))
{
/*
* tv_set_font(rb->global_settings->font_file) doesn't fail usually.
* if it fails, a fatal problem occurs in Rockbox.
*/
if (!rb->strcmp(preferences->font_name, rb->global_settings->font_file))
return TV_CALLBACK_ERROR;
font_changing = true;
tv_copy_preferences(&new_prefs);
rb->strlcpy(new_prefs.font_name, font_str, MAX_PATH);
return (tv_set_preferences(&new_prefs))? TV_CALLBACK_STOP : TV_CALLBACK_ERROR;
}
col_width = 2 * rb->font_get_width(rb->font_get(preferences->font_id), ' ');
font_changing = false;
}
#else
(void)oldp;
#endif
tv_change_viewport();
return TV_CALLBACK_OK;
}
bool tv_init_display(unsigned char **buf, size_t *size)
{
(void)buf;
(void)size;
display = rb->screens[SCREEN_MAIN];
display->clear_viewport();
tv_add_preferences_change_listner(tv_change_preferences);
return true;
}
void tv_finalize_display(void)
{
#ifdef HAVE_LCD_BITMAP
/* restore font */
if (preferences->font_id >= 0 &&
(preferences->font_id != rb->global_status->font_id[SCREEN_MAIN]))
{
rb->font_unload(preferences->font_id);
}
/* undo viewport */
if (is_initialized_vp)
rb->viewportmanager_theme_undo(SCREEN_MAIN, false);
#endif
}
bool tv_exist_scrollbar(void)
{
#ifdef HAVE_LCD_BITMAP
return true;
#else
return false;
#endif
}
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