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grub/grub-core/gfxmenu/view.c
Vladimir Testov ebc1da55cd * grub-core/gfxmenu/theme_loader.c: New global options for the 
theme background image handling. desktop-image-scale-method,
       desktop-image-h-align, desktop-image-v-align.
       * grub-core/gfxmenu/view.c: Likewise.
       * include/gfxmenu_view.h: Likewise.
       * include/bitmap_scale.h: Proportional scale functions introduced.
       * grub-core/video/bitmap_scale.c: Likewise. Verification checks are
       put in a separate functions. GRUB_ERR_BUG is set for grub_error in
       cases of unexpected input variables for scale functions.
       * docs/grub.texi: Updated documentation for new options.
2013-10-02 18:17:33 +04:00

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/* view.c - Graphical menu interface MVC view. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/types.h>
#include <grub/file.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/normal.h>
#include <grub/video.h>
#include <grub/gfxterm.h>
#include <grub/bitmap.h>
#include <grub/bitmap_scale.h>
#include <grub/term.h>
#include <grub/gfxwidgets.h>
#include <grub/time.h>
#include <grub/menu.h>
#include <grub/menu_viewer.h>
#include <grub/gfxmenu_view.h>
#include <grub/gui_string_util.h>
#include <grub/icon_manager.h>
#include <grub/i18n.h>
static void
init_terminal (grub_gfxmenu_view_t view);
static void
init_background (grub_gfxmenu_view_t view);
static grub_gfxmenu_view_t term_view;
/* Create a new view object, loading the theme specified by THEME_PATH and
associating MODEL with the view. */
grub_gfxmenu_view_t
grub_gfxmenu_view_new (const char *theme_path,
int width, int height)
{
grub_gfxmenu_view_t view;
grub_font_t default_font;
grub_video_rgba_color_t default_fg_color;
grub_video_rgba_color_t default_bg_color;
view = grub_malloc (sizeof (*view));
if (! view)
return 0;
while (grub_gfxmenu_timeout_notifications)
{
struct grub_gfxmenu_timeout_notify *p;
p = grub_gfxmenu_timeout_notifications;
grub_gfxmenu_timeout_notifications = grub_gfxmenu_timeout_notifications->next;
grub_free (p);
}
view->screen.x = 0;
view->screen.y = 0;
view->screen.width = width;
view->screen.height = height;
view->need_to_check_sanity = 1;
view->terminal_border = 3;
view->terminal_rect.width = view->screen.width * 7 / 10;
view->terminal_rect.height = view->screen.height * 7 / 10;
view->terminal_rect.x = view->screen.x + (view->screen.width
- view->terminal_rect.width) / 2;
view->terminal_rect.y = view->screen.y + (view->screen.height
- view->terminal_rect.height) / 2;
default_font = grub_font_get ("Unknown Regular 16");
default_fg_color = grub_video_rgba_color_rgb (0, 0, 0);
default_bg_color = grub_video_rgba_color_rgb (255, 255, 255);
view->canvas = 0;
view->title_font = default_font;
view->message_font = default_font;
view->terminal_font_name = grub_strdup ("Fixed 10");
view->title_color = default_fg_color;
view->message_color = default_bg_color;
view->message_bg_color = default_fg_color;
view->raw_desktop_image = 0;
view->scaled_desktop_image = 0;
view->desktop_image_scale_method = GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH;
view->desktop_image_h_align = GRUB_VIDEO_BITMAP_H_ALIGN_CENTER;
view->desktop_image_v_align = GRUB_VIDEO_BITMAP_V_ALIGN_CENTER;
view->desktop_color = default_bg_color;
view->terminal_box = grub_gfxmenu_create_box (0, 0);
view->title_text = grub_strdup (_("GRUB Boot Menu"));
view->progress_message_text = 0;
view->theme_path = 0;
/* Set the timeout bar's frame. */
view->progress_message_frame.width = view->screen.width * 4 / 5;
view->progress_message_frame.height = 50;
view->progress_message_frame.x = view->screen.x
+ (view->screen.width - view->progress_message_frame.width) / 2;
view->progress_message_frame.y = view->screen.y
+ view->screen.height - 90 - 20 - view->progress_message_frame.height;
if (grub_gfxmenu_view_load_theme (view, theme_path) != 0)
{
grub_gfxmenu_view_destroy (view);
return 0;
}
return view;
}
/* Destroy the view object. All used memory is freed. */
void
grub_gfxmenu_view_destroy (grub_gfxmenu_view_t view)
{
if (!view)
return;
while (grub_gfxmenu_timeout_notifications)
{
struct grub_gfxmenu_timeout_notify *p;
p = grub_gfxmenu_timeout_notifications;
grub_gfxmenu_timeout_notifications = grub_gfxmenu_timeout_notifications->next;
grub_free (p);
}
grub_video_bitmap_destroy (view->raw_desktop_image);
grub_video_bitmap_destroy (view->scaled_desktop_image);
if (view->terminal_box)
view->terminal_box->destroy (view->terminal_box);
grub_free (view->terminal_font_name);
grub_free (view->title_text);
grub_free (view->progress_message_text);
grub_free (view->theme_path);
if (view->canvas)
view->canvas->component.ops->destroy (view->canvas);
grub_free (view);
}
static void
redraw_background (grub_gfxmenu_view_t view,
const grub_video_rect_t *bounds)
{
if (view->scaled_desktop_image)
{
struct grub_video_bitmap *img = view->scaled_desktop_image;
grub_video_blit_bitmap (img, GRUB_VIDEO_BLIT_REPLACE,
bounds->x, bounds->y,
bounds->x - view->screen.x,
bounds->y - view->screen.y,
bounds->width, bounds->height);
}
else
{
grub_video_fill_rect (grub_video_map_rgba_color (view->desktop_color),
bounds->x, bounds->y,
bounds->width, bounds->height);
}
}
static void
draw_title (grub_gfxmenu_view_t view)
{
if (! view->title_text)
return;
/* Center the title. */
int title_width = grub_font_get_string_width (view->title_font,
view->title_text);
int x = (view->screen.width - title_width) / 2;
int y = 40 + grub_font_get_ascent (view->title_font);
grub_font_draw_string (view->title_text,
view->title_font,
grub_video_map_rgba_color (view->title_color),
x, y);
}
struct progress_value_data
{
int visible;
int start;
int end;
int value;
};
struct grub_gfxmenu_timeout_notify *grub_gfxmenu_timeout_notifications;
static void
update_timeouts (int visible, int start, int value, int end)
{
struct grub_gfxmenu_timeout_notify *cur;
for (cur = grub_gfxmenu_timeout_notifications; cur; cur = cur->next)
cur->set_state (cur->self, visible, start, value, end);
}
static void
redraw_timeouts (struct grub_gfxmenu_view *view)
{
struct grub_gfxmenu_timeout_notify *cur;
for (cur = grub_gfxmenu_timeout_notifications; cur; cur = cur->next)
{
grub_video_rect_t bounds;
cur->self->ops->get_bounds (cur->self, &bounds);
grub_gfxmenu_view_redraw (view, &bounds);
}
}
void
grub_gfxmenu_print_timeout (int timeout, void *data)
{
struct grub_gfxmenu_view *view = data;
if (view->first_timeout == -1)
view->first_timeout = timeout;
update_timeouts (1, -view->first_timeout, -timeout, 0);
redraw_timeouts (view);
grub_video_swap_buffers ();
if (view->double_repaint)
redraw_timeouts (view);
}
void
grub_gfxmenu_clear_timeout (void *data)
{
struct grub_gfxmenu_view *view = data;
update_timeouts (0, 1, 0, 0);
redraw_timeouts (view);
grub_video_swap_buffers ();
if (view->double_repaint)
redraw_timeouts (view);
}
static void
update_menu_visit (grub_gui_component_t component,
void *userdata)
{
grub_gfxmenu_view_t view;
view = userdata;
if (component->ops->is_instance (component, "list"))
{
grub_gui_list_t list = (grub_gui_list_t) component;
list->ops->set_view_info (list, view);
}
}
/* Update any boot menu components with the current menu model and
theme path. */
static void
update_menu_components (grub_gfxmenu_view_t view)
{
grub_gui_iterate_recursively ((grub_gui_component_t) view->canvas,
update_menu_visit, view);
}
static void
refresh_menu_visit (grub_gui_component_t component,
void *userdata)
{
grub_gfxmenu_view_t view;
view = userdata;
if (component->ops->is_instance (component, "list"))
{
grub_gui_list_t list = (grub_gui_list_t) component;
list->ops->refresh_list (list, view);
}
}
/* Refresh list information (useful for submenus) */
static void
refresh_menu_components (grub_gfxmenu_view_t view)
{
grub_gui_iterate_recursively ((grub_gui_component_t) view->canvas,
refresh_menu_visit, view);
}
static void
draw_message (grub_gfxmenu_view_t view)
{
char *text = view->progress_message_text;
grub_video_rect_t f = view->progress_message_frame;
if (! text)
return;
grub_font_t font = view->message_font;
grub_video_color_t color = grub_video_map_rgba_color (view->message_color);
/* Border. */
grub_video_fill_rect (color,
f.x-1, f.y-1, f.width+2, f.height+2);
/* Fill. */
grub_video_fill_rect (grub_video_map_rgba_color (view->message_bg_color),
f.x, f.y, f.width, f.height);
/* Center the text. */
int text_width = grub_font_get_string_width (font, text);
int x = f.x + (f.width - text_width) / 2;
int y = (f.y + (f.height - grub_font_get_descent (font)) / 2
+ grub_font_get_ascent (font) / 2);
grub_font_draw_string (text, font, color, x, y);
}
void
grub_gfxmenu_view_redraw (grub_gfxmenu_view_t view,
const grub_video_rect_t *region)
{
if (grub_video_have_common_points (&view->terminal_rect, region))
grub_gfxterm_schedule_repaint ();
grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
redraw_background (view, region);
if (view->canvas)
view->canvas->component.ops->paint (view->canvas, region);
draw_title (view);
if (grub_video_have_common_points (&view->progress_message_frame, region))
draw_message (view);
}
void
grub_gfxmenu_view_draw (grub_gfxmenu_view_t view)
{
init_terminal (view);
init_background (view);
/* Clear the screen; there may be garbage left over in video memory. */
grub_video_fill_rect (grub_video_map_rgb (0, 0, 0),
view->screen.x, view->screen.y,
view->screen.width, view->screen.height);
grub_video_swap_buffers ();
if (view->double_repaint)
grub_video_fill_rect (grub_video_map_rgb (0, 0, 0),
view->screen.x, view->screen.y,
view->screen.width, view->screen.height);
refresh_menu_components (view);
update_menu_components (view);
grub_gfxmenu_view_redraw (view, &view->screen);
grub_video_swap_buffers ();
if (view->double_repaint)
grub_gfxmenu_view_redraw (view, &view->screen);
}
static void
redraw_menu_visit (grub_gui_component_t component,
void *userdata)
{
grub_gfxmenu_view_t view;
view = userdata;
if (component->ops->is_instance (component, "list"))
{
grub_video_rect_t bounds;
component->ops->get_bounds (component, &bounds);
grub_gfxmenu_view_redraw (view, &bounds);
}
}
void
grub_gfxmenu_redraw_menu (grub_gfxmenu_view_t view)
{
update_menu_components (view);
grub_gui_iterate_recursively ((grub_gui_component_t) view->canvas,
redraw_menu_visit, view);
grub_video_swap_buffers ();
if (view->double_repaint)
{
grub_gui_iterate_recursively ((grub_gui_component_t) view->canvas,
redraw_menu_visit, view);
}
}
void
grub_gfxmenu_set_chosen_entry (int entry, void *data)
{
grub_gfxmenu_view_t view = data;
view->selected = entry;
grub_gfxmenu_redraw_menu (view);
}
static void
grub_gfxmenu_draw_terminal_box (void)
{
grub_gfxmenu_box_t term_box;
term_box = term_view->terminal_box;
if (!term_box)
return;
term_box->set_content_size (term_box, term_view->terminal_rect.width,
term_view->terminal_rect.height);
term_box->draw (term_box,
term_view->terminal_rect.x - term_box->get_left_pad (term_box),
term_view->terminal_rect.y - term_box->get_top_pad (term_box));
}
static void
get_min_terminal (grub_font_t terminal_font,
unsigned int border_width,
unsigned int *min_terminal_width,
unsigned int *min_terminal_height)
{
struct grub_font_glyph *glyph;
glyph = grub_font_get_glyph (terminal_font, 'M');
*min_terminal_width = (glyph? glyph->device_width : 8) * 80
+ 2 * border_width;
*min_terminal_height = grub_font_get_max_char_height (terminal_font) * 24
+ 2 * border_width;
}
static void
terminal_sanity_check (grub_gfxmenu_view_t view)
{
if (!view->need_to_check_sanity)
return;
/* terminal_font was checked before in the init_terminal function. */
grub_font_t terminal_font = grub_font_get (view->terminal_font_name);
/* Non-negative numbers below. */
int scr_x = view->screen.x;
int scr_y = view->screen.y;
int scr_width = view->screen.width;
int scr_height = view->screen.height;
int term_x = view->terminal_rect.x;
int term_y = view->terminal_rect.y;
int term_width = view->terminal_rect.width;
int term_height = view->terminal_rect.height;
/* Check that border_width isn't too big. */
unsigned int border_width = view->terminal_border;
unsigned int min_terminal_width;
unsigned int min_terminal_height;
get_min_terminal (terminal_font, border_width,
&min_terminal_width, &min_terminal_height);
if (border_width > 3 && ((int) min_terminal_width >= scr_width
|| (int) min_terminal_height >= scr_height))
{
border_width = 3;
get_min_terminal (terminal_font, border_width,
&min_terminal_width, &min_terminal_height);
}
/* Sanity checks. */
if (term_width > scr_width)
term_width = scr_width;
if (term_height > scr_height)
term_height = scr_height;
if (scr_width <= (int) min_terminal_width
|| scr_height <= (int) min_terminal_height)
{
/* The screen resulution is too low. Use all space, except a small border
to show the user, that it is a window. Then center the window. */
term_width = scr_width - 6 * border_width;
term_height = scr_height - 6 * border_width;
term_x = scr_x + (scr_width - term_width) / 2;
term_y = scr_y + (scr_height - term_height) / 2;
}
else if (term_width < (int) min_terminal_width
|| term_height < (int) min_terminal_height)
{
/* The screen resolution is big enough. Make sure, that terminal screen
dimensions aren't less than minimal values. Then center the window. */
term_width = (int) min_terminal_width;
term_height = (int) min_terminal_height;
term_x = scr_x + (scr_width - term_width) / 2;
term_y = scr_y + (scr_height - term_height) / 2;
}
/* At this point w and h are satisfying. */
if (term_x + term_width > scr_width)
term_x = scr_width - term_width;
if (term_y + term_height > scr_height)
term_y = scr_height - term_height;
/* Write down corrected data. */
view->terminal_rect.x = (unsigned int) term_x;
view->terminal_rect.y = (unsigned int) term_y;
view->terminal_rect.width = (unsigned int) term_width;
view->terminal_rect.height = (unsigned int) term_height;
view->terminal_border = border_width;
view->need_to_check_sanity = 0;
}
static void
init_terminal (grub_gfxmenu_view_t view)
{
grub_font_t terminal_font;
terminal_font = grub_font_get (view->terminal_font_name);
if (!terminal_font)
{
grub_error (GRUB_ERR_BAD_FONT, "no font loaded");
return;
}
/* Check that terminal window size and position are sane. */
terminal_sanity_check (view);
term_view = view;
/* Note: currently there is no API for changing the gfxterm font
on the fly, so whatever font the initially loaded theme specifies
will be permanent. */
grub_gfxterm_set_window (GRUB_VIDEO_RENDER_TARGET_DISPLAY,
view->terminal_rect.x,
view->terminal_rect.y,
view->terminal_rect.width,
view->terminal_rect.height,
view->double_repaint,
terminal_font,
view->terminal_border);
grub_gfxterm_decorator_hook = grub_gfxmenu_draw_terminal_box;
}
static void
init_background (grub_gfxmenu_view_t view)
{
if (view->scaled_desktop_image)
return;
struct grub_video_bitmap *scaled_bitmap;
if (view->desktop_image_scale_method ==
GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH)
grub_video_bitmap_create_scaled (&scaled_bitmap,
view->screen.width,
view->screen.height,
view->raw_desktop_image,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
else
grub_video_bitmap_scale_proportional (&scaled_bitmap,
view->screen.width,
view->screen.height,
view->raw_desktop_image,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST,
view->desktop_image_scale_method,
view->desktop_image_v_align,
view->desktop_image_h_align);
if (! scaled_bitmap)
return;
view->scaled_desktop_image = scaled_bitmap;
}
/* FIXME: previously notifications were displayed in special case.
Is it necessary?
*/
#if 0
/* Sets MESSAGE as the progress message for the view.
MESSAGE can be 0, in which case no message is displayed. */
static void
set_progress_message (grub_gfxmenu_view_t view, const char *message)
{
grub_free (view->progress_message_text);
if (message)
view->progress_message_text = grub_strdup (message);
else
view->progress_message_text = 0;
}
static void
notify_booting (grub_menu_entry_t entry, void *userdata)
{
grub_gfxmenu_view_t view = (grub_gfxmenu_view_t) userdata;
char *s = grub_malloc (100 + grub_strlen (entry->title));
if (!s)
return;
grub_sprintf (s, "Booting '%s'", entry->title);
set_progress_message (view, s);
grub_free (s);
grub_gfxmenu_view_redraw (view, &view->progress_message_frame);
grub_video_swap_buffers ();
if (view->double_repaint)
grub_gfxmenu_view_redraw (view, &view->progress_message_frame);
}
static void
notify_fallback (grub_menu_entry_t entry, void *userdata)
{
grub_gfxmenu_view_t view = (grub_gfxmenu_view_t) userdata;
char *s = grub_malloc (100 + grub_strlen (entry->title));
if (!s)
return;
grub_sprintf (s, "Falling back to '%s'", entry->title);
set_progress_message (view, s);
grub_free (s);
grub_gfxmenu_view_redraw (view, &view->progress_message_frame);
grub_video_swap_buffers ();
if (view->double_repaint)
grub_gfxmenu_view_redraw (view, &view->progress_message_frame);
}
static void
notify_execution_failure (void *userdata __attribute__ ((unused)))
{
}
static struct grub_menu_execute_callback execute_callback =
{
.notify_booting = notify_booting,
.notify_fallback = notify_fallback,
.notify_failure = notify_execution_failure
};
#endif
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