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grub/term/gfxterm.c
BVK Chaitanya d18b05c4e3 merge with mainline
2010-07-12 17:29:44 +05:30

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007,2008,2009 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/term.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/font.h>
#include <grub/mm.h>
#include <grub/env.h>
#include <grub/video.h>
#include <grub/gfxterm.h>
#include <grub/bitmap.h>
#include <grub/command.h>
#include <grub/extcmd.h>
#include <grub/bitmap_scale.h>
#include <grub/i18n.h>
#define DEFAULT_VIDEO_MODE "auto"
#define DEFAULT_BORDER_WIDTH 10
#define DEFAULT_STANDARD_COLOR 0x07
struct grub_dirty_region
{
int top_left_x;
int top_left_y;
int bottom_right_x;
int bottom_right_y;
};
struct grub_colored_char
{
/* An Unicode codepoint. */
struct grub_unicode_glyph *code;
/* Color values. */
grub_video_color_t fg_color;
grub_video_color_t bg_color;
/* The width of this character minus one. */
unsigned char width;
/* The column index of this character. */
unsigned char index;
};
struct grub_virtual_screen
{
/* Dimensions of the virtual screen in pixels. */
unsigned int width;
unsigned int height;
/* Offset in the display in pixels. */
unsigned int offset_x;
unsigned int offset_y;
/* TTY Character sizes in pixes. */
unsigned int normal_char_width;
unsigned int normal_char_height;
/* Virtual screen TTY size in characters. */
unsigned int columns;
unsigned int rows;
/* Current cursor location in characters. */
unsigned int cursor_x;
unsigned int cursor_y;
/* Current cursor state. */
int cursor_state;
/* Font settings. */
grub_font_t font;
/* Terminal color settings. */
grub_uint8_t standard_color_setting;
grub_uint8_t term_color;
/* Color settings. */
grub_video_color_t fg_color;
grub_video_color_t bg_color;
grub_video_color_t bg_color_display;
/* Text buffer for virtual screen. Contains (columns * rows) number
of entries. */
struct grub_colored_char *text_buffer;
int total_scroll;
};
struct grub_gfxterm_window
{
unsigned x;
unsigned y;
unsigned width;
unsigned height;
int double_repaint;
};
static struct grub_video_render_target *render_target;
void (*grub_gfxterm_decorator_hook) (void) = NULL;
static struct grub_gfxterm_window window;
static struct grub_virtual_screen virtual_screen;
static grub_gfxterm_repaint_callback_t repaint_callback;
static int repaint_scheduled = 0;
static int repaint_was_scheduled = 0;
static void destroy_window (void);
static struct grub_video_render_target *text_layer;
static unsigned int bitmap_width;
static unsigned int bitmap_height;
static struct grub_video_bitmap *bitmap;
static struct grub_dirty_region dirty_region;
static void dirty_region_reset (void);
static int dirty_region_is_empty (void);
static void dirty_region_add (int x, int y,
unsigned int width, unsigned int height);
static unsigned int calculate_normal_character_width (grub_font_t font);
static unsigned char calculate_character_width (struct grub_font_glyph *glyph);
static void grub_gfxterm_refresh (struct grub_term_output *term __attribute__ ((unused)));
static grub_ssize_t
grub_gfxterm_getcharwidth (struct grub_term_output *term __attribute__ ((unused)),
const struct grub_unicode_glyph *c);
static void
set_term_color (grub_uint8_t term_color)
{
struct grub_video_render_target *old_target;
/* Save previous target and switch to text layer. */
grub_video_get_active_render_target (&old_target);
grub_video_set_active_render_target (text_layer);
/* Map terminal color to text layer compatible video colors. */
virtual_screen.fg_color = grub_video_map_color(term_color & 0x0f);
/* Special case: use black as transparent color. */
if (((term_color >> 4) & 0x0f) == 0)
{
virtual_screen.bg_color = grub_video_map_rgba(0, 0, 0, 0);
}
else
{
virtual_screen.bg_color = grub_video_map_color((term_color >> 4) & 0x0f);
}
/* Restore previous target. */
grub_video_set_active_render_target (old_target);
}
static void
clear_char (struct grub_colored_char *c)
{
grub_free (c->code);
c->code = grub_unicode_glyph_from_code (' ');
if (!c->code)
grub_errno = GRUB_ERR_NONE;
c->fg_color = virtual_screen.fg_color;
c->bg_color = virtual_screen.bg_color;
c->width = 0;
c->index = 0;
}
static void
grub_virtual_screen_free (void)
{
/* If virtual screen has been allocated, free it. */
if (virtual_screen.text_buffer != 0)
grub_free (virtual_screen.text_buffer);
/* Reset virtual screen data. */
grub_memset (&virtual_screen, 0, sizeof (virtual_screen));
/* Free render targets. */
grub_video_delete_render_target (text_layer);
text_layer = 0;
}
static grub_err_t
grub_virtual_screen_setup (unsigned int x, unsigned int y,
unsigned int width, unsigned int height,
const char *font_name)
{
unsigned int i;
/* Free old virtual screen. */
grub_virtual_screen_free ();
/* Initialize with default data. */
virtual_screen.font = grub_font_get (font_name);
if (!virtual_screen.font)
return grub_error (GRUB_ERR_BAD_FONT,
"no font loaded");
virtual_screen.width = width;
virtual_screen.height = height;
virtual_screen.offset_x = x;
virtual_screen.offset_y = y;
virtual_screen.normal_char_width =
calculate_normal_character_width (virtual_screen.font);
virtual_screen.normal_char_height =
grub_font_get_max_char_height (virtual_screen.font);
virtual_screen.cursor_x = 0;
virtual_screen.cursor_y = 0;
virtual_screen.cursor_state = 1;
virtual_screen.total_scroll = 0;
/* Calculate size of text buffer. */
virtual_screen.columns = virtual_screen.width / virtual_screen.normal_char_width;
virtual_screen.rows = virtual_screen.height / virtual_screen.normal_char_height;
/* Allocate memory for text buffer. */
virtual_screen.text_buffer =
(struct grub_colored_char *) grub_malloc (virtual_screen.columns
* virtual_screen.rows
* sizeof (*virtual_screen.text_buffer));
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
/* Create new render target for text layer. */
grub_video_create_render_target (&text_layer,
virtual_screen.width,
virtual_screen.height,
GRUB_VIDEO_MODE_TYPE_RGB
| GRUB_VIDEO_MODE_TYPE_ALPHA);
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
/* As we want to have colors compatible with rendering target,
we can only have those after mode is initialized. */
grub_video_set_active_render_target (text_layer);
virtual_screen.standard_color_setting = DEFAULT_STANDARD_COLOR;
virtual_screen.term_color = GRUB_TERM_DEFAULT_NORMAL_COLOR;
set_term_color (virtual_screen.term_color);
grub_video_set_active_render_target (render_target);
virtual_screen.bg_color_display = grub_video_map_rgba(0, 0, 0, 0);
/* Clear out text buffer. */
for (i = 0; i < virtual_screen.columns * virtual_screen.rows; i++)
{
virtual_screen.text_buffer[i].code = 0;
clear_char (&(virtual_screen.text_buffer[i]));
}
return grub_errno;
}
void
grub_gfxterm_schedule_repaint (void)
{
repaint_scheduled = 1;
}
grub_err_t
grub_gfxterm_set_window (struct grub_video_render_target *target,
int x, int y, int width, int height,
int double_repaint,
const char *font_name, int border_width)
{
/* Clean up any prior instance. */
destroy_window ();
/* Set the render target. */
render_target = target;
/* Create virtual screen. */
if (grub_virtual_screen_setup (border_width, border_width,
width - 2 * border_width,
height - 2 * border_width,
font_name)
!= GRUB_ERR_NONE)
{
return grub_errno;
}
/* Set window bounds. */
window.x = x;
window.y = y;
window.width = width;
window.height = height;
window.double_repaint = double_repaint;
dirty_region_reset ();
grub_gfxterm_schedule_repaint ();
return grub_errno;
}
grub_err_t
grub_gfxterm_fullscreen (void)
{
const char *font_name;
struct grub_video_mode_info mode_info;
grub_video_color_t color;
grub_err_t err;
int double_redraw;
err = grub_video_get_info (&mode_info);
/* Figure out what mode we ended up. */
if (err)
return err;
grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
double_redraw = mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
&& !(mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
/* Make sure screen is black. */
color = grub_video_map_rgb (0, 0, 0);
grub_video_fill_rect (color, 0, 0, mode_info.width, mode_info.height);
if (double_redraw)
{
grub_video_swap_buffers ();
grub_video_fill_rect (color, 0, 0, mode_info.width, mode_info.height);
}
bitmap = 0;
/* Select the font to use. */
font_name = grub_env_get ("gfxterm_font");
if (! font_name)
font_name = ""; /* Allow fallback to any font. */
grub_gfxterm_decorator_hook = NULL;
return grub_gfxterm_set_window (GRUB_VIDEO_RENDER_TARGET_DISPLAY,
0, 0, mode_info.width, mode_info.height,
double_redraw,
font_name, DEFAULT_BORDER_WIDTH);
}
static grub_err_t
grub_gfxterm_term_init (struct grub_term_output *term __attribute__ ((unused)))
{
char *tmp;
grub_err_t err;
const char *modevar;
/* Parse gfxmode environment variable if set. */
modevar = grub_env_get ("gfxmode");
if (! modevar || *modevar == 0)
err = grub_video_set_mode (DEFAULT_VIDEO_MODE,
GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
else
{
tmp = grub_xasprintf ("%s;" DEFAULT_VIDEO_MODE, modevar);
if (!tmp)
return grub_errno;
err = grub_video_set_mode (tmp, GRUB_VIDEO_MODE_TYPE_PURE_TEXT, 0);
grub_free (tmp);
}
if (err)
return err;
err = grub_gfxterm_fullscreen ();
if (err)
grub_video_restore ();
return err;
}
static void
destroy_window (void)
{
if (bitmap)
{
grub_video_bitmap_destroy (bitmap);
bitmap = 0;
}
repaint_callback = 0;
grub_virtual_screen_free ();
}
static grub_err_t
grub_gfxterm_term_fini (struct grub_term_output *term __attribute__ ((unused)))
{
destroy_window ();
grub_video_restore ();
/* Clear error state. */
grub_errno = GRUB_ERR_NONE;
return GRUB_ERR_NONE;
}
static void
redraw_screen_rect (unsigned int x, unsigned int y,
unsigned int width, unsigned int height)
{
grub_video_color_t color;
grub_video_rect_t saved_view;
grub_video_set_active_render_target (render_target);
/* Save viewport and set it to our window. */
grub_video_get_viewport ((unsigned *) &saved_view.x,
(unsigned *) &saved_view.y,
(unsigned *) &saved_view.width,
(unsigned *) &saved_view.height);
grub_video_set_viewport (window.x, window.y, window.width, window.height);
if (bitmap)
{
/* Render bitmap as background. */
grub_video_blit_bitmap (bitmap, GRUB_VIDEO_BLIT_REPLACE, x, y,
x, y,
width, height);
/* If bitmap is smaller than requested blit area, use background
color. */
color = virtual_screen.bg_color_display;
/* Fill right side of the bitmap if needed. */
if ((x + width >= bitmap_width) && (y < bitmap_height))
{
int w = (x + width) - bitmap_width;
int h = height;
unsigned int tx = x;
if (y + height >= bitmap_height)
{
h = bitmap_height - y;
}
if (bitmap_width > tx)
{
tx = bitmap_width;
}
/* Render background layer. */
grub_video_fill_rect (color, tx, y, w, h);
}
/* Fill bottom side of the bitmap if needed. */
if (y + height >= bitmap_height)
{
int h = (y + height) - bitmap_height;
unsigned int ty = y;
if (bitmap_height > ty)
{
ty = bitmap_height;
}
/* Render background layer. */
grub_video_fill_rect (color, x, ty, width, h);
}
/* Render text layer as blended. */
grub_video_blit_render_target (text_layer, GRUB_VIDEO_BLIT_BLEND, x, y,
x - virtual_screen.offset_x,
y - virtual_screen.offset_y,
width, height);
}
else
{
/* Render background layer. */
color = virtual_screen.bg_color_display;
grub_video_fill_rect (color, x, y, width, height);
/* Render text layer as replaced (to get texts background color). */
grub_video_blit_render_target (text_layer, GRUB_VIDEO_BLIT_REPLACE, x, y,
x - virtual_screen.offset_x,
y - virtual_screen.offset_y,
width, height);
}
/* Restore saved viewport. */
grub_video_set_viewport (saved_view.x, saved_view.y,
saved_view.width, saved_view.height);
grub_video_set_active_render_target (render_target);
if (repaint_callback)
repaint_callback (x, y, width, height);
}
static void
dirty_region_reset (void)
{
dirty_region.top_left_x = -1;
dirty_region.top_left_y = -1;
dirty_region.bottom_right_x = -1;
dirty_region.bottom_right_y = -1;
repaint_was_scheduled = 0;
}
static int
dirty_region_is_empty (void)
{
if ((dirty_region.top_left_x == -1)
|| (dirty_region.top_left_y == -1)
|| (dirty_region.bottom_right_x == -1)
|| (dirty_region.bottom_right_y == -1))
return 1;
return 0;
}
static void
dirty_region_add (int x, int y, unsigned int width, unsigned int height)
{
if ((width == 0) || (height == 0))
return;
if (repaint_scheduled)
{
x = virtual_screen.offset_x;
y = virtual_screen.offset_y;
width = virtual_screen.width;
height = virtual_screen.height;
repaint_scheduled = 0;
repaint_was_scheduled = 1;
}
if (dirty_region_is_empty ())
{
dirty_region.top_left_x = x;
dirty_region.top_left_y = y;
dirty_region.bottom_right_x = x + width - 1;
dirty_region.bottom_right_y = y + height - 1;
}
else
{
if (x < dirty_region.top_left_x)
dirty_region.top_left_x = x;
if (y < dirty_region.top_left_y)
dirty_region.top_left_y = y;
if ((x + (int)width - 1) > dirty_region.bottom_right_x)
dirty_region.bottom_right_x = x + width - 1;
if ((y + (int)height - 1) > dirty_region.bottom_right_y)
dirty_region.bottom_right_y = y + height - 1;
}
}
static void
dirty_region_add_virtualscreen (void)
{
/* Mark virtual screen as dirty. */
dirty_region_add (virtual_screen.offset_x, virtual_screen.offset_y,
virtual_screen.width, virtual_screen.height);
}
static void
dirty_region_redraw (void)
{
int x;
int y;
int width;
int height;
if (dirty_region_is_empty ())
return;
x = dirty_region.top_left_x;
y = dirty_region.top_left_y;
width = dirty_region.bottom_right_x - x + 1;
height = dirty_region.bottom_right_y - y + 1;
if (repaint_was_scheduled && grub_gfxterm_decorator_hook)
grub_gfxterm_decorator_hook ();
redraw_screen_rect (x, y, width, height);
}
static inline void
paint_char (unsigned cx, unsigned cy)
{
struct grub_colored_char *p;
struct grub_font_glyph *glyph;
grub_video_color_t color;
grub_video_color_t bgcolor;
unsigned int x;
unsigned int y;
int ascent;
unsigned int height;
unsigned int width;
if (cy + virtual_screen.total_scroll >= virtual_screen.rows)
return;
/* Find out active character. */
p = (virtual_screen.text_buffer
+ cx + (cy * virtual_screen.columns));
p -= p->index;
/* Get glyph for character. */
glyph = grub_font_construct_glyph (virtual_screen.font, p->code);
if (!glyph)
{
grub_errno = GRUB_ERR_NONE;
return;
}
ascent = grub_font_get_ascent (virtual_screen.font);
width = virtual_screen.normal_char_width * calculate_character_width(glyph);
height = virtual_screen.normal_char_height;
color = p->fg_color;
bgcolor = p->bg_color;
x = cx * virtual_screen.normal_char_width;
y = (cy + virtual_screen.total_scroll) * virtual_screen.normal_char_height;
/* Render glyph to text layer. */
grub_video_set_active_render_target (text_layer);
grub_video_fill_rect (bgcolor, x, y, width, height);
grub_font_draw_glyph (glyph, color, x, y + ascent);
grub_video_set_active_render_target (render_target);
/* Mark character to be drawn. */
dirty_region_add (virtual_screen.offset_x + x, virtual_screen.offset_y + y,
width, height);
grub_free (glyph);
}
static inline void
write_char (void)
{
paint_char (virtual_screen.cursor_x, virtual_screen.cursor_y);
}
static inline void
draw_cursor (int show)
{
unsigned int x;
unsigned int y;
unsigned int width;
unsigned int height;
grub_video_color_t color;
write_char ();
if (!show)
return;
if (virtual_screen.cursor_y + virtual_screen.total_scroll
>= virtual_screen.rows)
return;
/* Determine cursor properties and position on text layer. */
x = virtual_screen.cursor_x * virtual_screen.normal_char_width;
width = virtual_screen.normal_char_width;
color = virtual_screen.fg_color;
y = ((virtual_screen.cursor_y + virtual_screen.total_scroll)
* virtual_screen.normal_char_height
+ grub_font_get_ascent (virtual_screen.font));
height = 2;
/* Render cursor to text layer. */
grub_video_set_active_render_target (text_layer);
grub_video_fill_rect (color, x, y, width, height);
grub_video_set_active_render_target (render_target);
/* Mark cursor to be redrawn. */
dirty_region_add (virtual_screen.offset_x + x,
virtual_screen.offset_y + y,
width, height);
}
static void
real_scroll (void)
{
unsigned int i, j, was_scroll;
grub_video_color_t color;
if (!virtual_screen.total_scroll)
return;
/* If we have bitmap, re-draw screen, otherwise scroll physical screen too. */
if (bitmap)
{
/* Scroll physical screen. */
grub_video_set_active_render_target (text_layer);
color = virtual_screen.bg_color;
grub_video_scroll (color, 0, -virtual_screen.normal_char_height
* virtual_screen.total_scroll);
/* Mark virtual screen to be redrawn. */
dirty_region_add_virtualscreen ();
}
else
{
grub_video_rect_t saved_view;
/* Remove cursor. */
draw_cursor (0);
grub_video_set_active_render_target (render_target);
i = window.double_repaint ? 2 : 1;
color = virtual_screen.bg_color;
while (i--)
{
/* Save viewport and set it to our window. */
grub_video_get_viewport ((unsigned *) &saved_view.x,
(unsigned *) &saved_view.y,
(unsigned *) &saved_view.width,
(unsigned *) &saved_view.height);
grub_video_set_viewport (window.x, window.y, window.width,
window.height);
/* Clear new border area. */
grub_video_fill_rect (color,
virtual_screen.offset_x,
virtual_screen.offset_y,
virtual_screen.width,
virtual_screen.normal_char_height
* virtual_screen.total_scroll);
grub_video_set_active_render_target (render_target);
dirty_region_redraw ();
/* Scroll physical screen. */
grub_video_scroll (color, 0, -virtual_screen.normal_char_height
* virtual_screen.total_scroll);
/* Restore saved viewport. */
grub_video_set_viewport (saved_view.x, saved_view.y,
saved_view.width, saved_view.height);
if (i)
grub_video_swap_buffers ();
}
dirty_region_reset ();
/* Scroll physical screen. */
grub_video_set_active_render_target (text_layer);
color = virtual_screen.bg_color;
grub_video_scroll (color, 0, -virtual_screen.normal_char_height
* virtual_screen.total_scroll);
grub_video_set_active_render_target (render_target);
}
was_scroll = virtual_screen.total_scroll;
virtual_screen.total_scroll = 0;
if (was_scroll > virtual_screen.rows)
was_scroll = virtual_screen.rows;
/* Draw shadow part. */
for (i = virtual_screen.rows - was_scroll;
i < virtual_screen.rows; i++)
for (j = 0; j < virtual_screen.columns; j++)
paint_char (j, i);
/* Draw cursor if visible. */
if (virtual_screen.cursor_state)
draw_cursor (1);
if (repaint_callback)
repaint_callback (window.x, window.y, window.width, window.height);
}
static void
scroll_up (void)
{
unsigned int i;
/* Clear first line in text buffer. */
for (i = 0;
i < virtual_screen.columns;
i++)
{
virtual_screen.text_buffer[i].code = 0;
clear_char (&(virtual_screen.text_buffer[i]));
}
/* Scroll text buffer with one line to up. */
grub_memmove (virtual_screen.text_buffer,
virtual_screen.text_buffer + virtual_screen.columns,
sizeof (*virtual_screen.text_buffer)
* virtual_screen.columns
* (virtual_screen.rows - 1));
/* Clear last line in text buffer. */
for (i = virtual_screen.columns * (virtual_screen.rows - 1);
i < virtual_screen.columns * virtual_screen.rows;
i++)
{
virtual_screen.text_buffer[i].code = 0;
clear_char (&(virtual_screen.text_buffer[i]));
}
virtual_screen.total_scroll++;
}
static void
grub_gfxterm_putchar (struct grub_term_output *term,
const struct grub_unicode_glyph *c)
{
if (c->base == '\a')
/* FIXME */
return;
/* Erase current cursor, if any. */
if (virtual_screen.cursor_state)
draw_cursor (0);
if (c->base == '\b' || c->base == '\n' || c->base == '\r')
{
switch (c->base)
{
case '\b':
if (virtual_screen.cursor_x > 0)
virtual_screen.cursor_x--;
break;
case '\n':
if (virtual_screen.cursor_y >= virtual_screen.rows - 1)
scroll_up ();
else
virtual_screen.cursor_y++;
break;
case '\r':
virtual_screen.cursor_x = 0;
break;
}
}
else
{
struct grub_colored_char *p;
unsigned char char_width;
/* Calculate actual character width for glyph. This is number of
times of normal_font_width. */
char_width = grub_gfxterm_getcharwidth (term, c);
/* If we are about to exceed line length, wrap to next line. */
if (virtual_screen.cursor_x + char_width > virtual_screen.columns)
{
if (virtual_screen.cursor_y >= virtual_screen.rows - 1)
scroll_up ();
else
virtual_screen.cursor_y++;
}
/* Find position on virtual screen, and fill information. */
p = (virtual_screen.text_buffer +
virtual_screen.cursor_x +
virtual_screen.cursor_y * virtual_screen.columns);
grub_free (p->code);
p->code = grub_unicode_glyph_dup (c);
if (!p->code)
grub_errno = GRUB_ERR_NONE;
p->fg_color = virtual_screen.fg_color;
p->bg_color = virtual_screen.bg_color;
p->width = char_width - 1;
p->index = 0;
/* If we have large glyph, add fixup info. */
if (char_width > 1)
{
unsigned i;
for (i = 1; i < char_width; i++)
{
grub_free (p[i].code);
p[i].code = grub_unicode_glyph_from_code (' ');
if (!p[i].code)
grub_errno = GRUB_ERR_NONE;
p[i].width = char_width - 1;
p[i].index = i;
}
}
/* Draw glyph. */
write_char ();
/* Make sure we scroll screen when needed and wrap line correctly. */
virtual_screen.cursor_x += char_width;
if (virtual_screen.cursor_x >= virtual_screen.columns)
{
virtual_screen.cursor_x = 0;
if (virtual_screen.cursor_y >= virtual_screen.rows - 1)
scroll_up ();
else
virtual_screen.cursor_y++;
}
}
/* Redraw cursor if it should be visible. */
/* Note: This will redraw the character as well, which means that the
above call to write_char is redundant when the cursor is showing. */
if (virtual_screen.cursor_state)
draw_cursor (1);
}
/* Use ASCII characters to determine normal character width. */
static unsigned int
calculate_normal_character_width (grub_font_t font)
{
struct grub_font_glyph *glyph;
unsigned int width = 0;
unsigned int i;
/* Get properties of every printable ASCII character. */
for (i = 32; i < 127; i++)
{
glyph = grub_font_get_glyph (font, i);
/* Skip unknown characters. Should never happen on normal conditions. */
if (! glyph)
continue;
if (glyph->device_width > width)
width = glyph->device_width;
}
return width;
}
static unsigned char
calculate_character_width (struct grub_font_glyph *glyph)
{
if (! glyph || glyph->device_width == 0)
return 1;
return (glyph->device_width
+ (virtual_screen.normal_char_width - 1))
/ virtual_screen.normal_char_width;
}
static grub_ssize_t
grub_gfxterm_getcharwidth (struct grub_term_output *term __attribute__ ((unused)),
const struct grub_unicode_glyph *c)
{
int dev_width;
dev_width = grub_font_get_constructed_device_width (virtual_screen.font, c);
if (dev_width == 0)
return 1;
return (dev_width + (virtual_screen.normal_char_width - 1))
/ virtual_screen.normal_char_width;
}
static grub_uint16_t
grub_virtual_screen_getwh (struct grub_term_output *term __attribute__ ((unused)))
{
return (virtual_screen.columns << 8) | virtual_screen.rows;
}
static grub_uint16_t
grub_virtual_screen_getxy (struct grub_term_output *term __attribute__ ((unused)))
{
return ((virtual_screen.cursor_x << 8) | virtual_screen.cursor_y);
}
static void
grub_gfxterm_gotoxy (struct grub_term_output *term __attribute__ ((unused)),
grub_uint8_t x, grub_uint8_t y)
{
if (x >= virtual_screen.columns)
x = virtual_screen.columns - 1;
if (y >= virtual_screen.rows)
y = virtual_screen.rows - 1;
/* Erase current cursor, if any. */
if (virtual_screen.cursor_state)
draw_cursor (0);
virtual_screen.cursor_x = x;
virtual_screen.cursor_y = y;
/* Draw cursor if visible. */
if (virtual_screen.cursor_state)
draw_cursor (1);
}
static void
grub_virtual_screen_cls (struct grub_term_output *term __attribute__ ((unused)))
{
grub_uint32_t i;
for (i = 0; i < virtual_screen.columns * virtual_screen.rows; i++)
clear_char (&(virtual_screen.text_buffer[i]));
virtual_screen.cursor_x = virtual_screen.cursor_y = 0;
}
static void
grub_gfxterm_cls (struct grub_term_output *term)
{
grub_video_color_t color;
/* Clear virtual screen. */
grub_virtual_screen_cls (term);
/* Clear text layer. */
grub_video_set_active_render_target (text_layer);
color = virtual_screen.bg_color;
grub_video_fill_rect (color, 0, 0,
virtual_screen.width, virtual_screen.height);
grub_video_set_active_render_target (render_target);
/* Mark virtual screen to be redrawn. */
dirty_region_add_virtualscreen ();
grub_gfxterm_refresh (term);
}
static void
grub_virtual_screen_setcolorstate (struct grub_term_output *term,
grub_term_color_state state)
{
switch (state)
{
case GRUB_TERM_COLOR_STANDARD:
virtual_screen.term_color = virtual_screen.standard_color_setting;
break;
case GRUB_TERM_COLOR_NORMAL:
virtual_screen.term_color = term->normal_color;
break;
case GRUB_TERM_COLOR_HIGHLIGHT:
virtual_screen.term_color = term->highlight_color;
break;
default:
break;
}
/* Change color to virtual terminal. */
set_term_color (virtual_screen.term_color);
}
static void
grub_gfxterm_setcursor (struct grub_term_output *term __attribute__ ((unused)),
int on)
{
if (virtual_screen.cursor_state != on)
{
if (virtual_screen.cursor_state)
draw_cursor (0);
else
draw_cursor (1);
virtual_screen.cursor_state = on;
}
}
static void
grub_gfxterm_refresh (struct grub_term_output *term __attribute__ ((unused)))
{
real_scroll ();
/* Redraw only changed regions. */
dirty_region_redraw ();
grub_video_swap_buffers ();
if (window.double_repaint)
dirty_region_redraw ();
dirty_region_reset ();
}
void
grub_gfxterm_set_repaint_callback (grub_gfxterm_repaint_callback_t func)
{
repaint_callback = func;
}
/* Option array indices. */
#define BACKGROUND_CMD_ARGINDEX_MODE 0
static const struct grub_arg_option background_image_cmd_options[] =
{
{"mode", 'm', 0, "Background image mode.", "stretch|normal",
ARG_TYPE_STRING},
{0, 0, 0, 0, 0, 0}
};
static grub_err_t
grub_gfxterm_background_image_cmd (grub_extcmd_context_t ctxt,
int argc, char **args)
{
struct grub_arg_list *state = ctxt->state;
/* Check that we have video adapter active. */
if (grub_video_get_info(NULL) != GRUB_ERR_NONE)
return grub_errno;
/* Destroy existing background bitmap if loaded. */
if (bitmap)
{
grub_video_bitmap_destroy (bitmap);
bitmap = 0;
/* Mark whole screen as dirty. */
dirty_region_add (0, 0, window.width, window.height);
}
/* If filename was provided, try to load that. */
if (argc >= 1)
{
/* Try to load new one. */
grub_video_bitmap_load (&bitmap, args[0]);
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
/* Determine if the bitmap should be scaled to fit the screen. */
if (!state[BACKGROUND_CMD_ARGINDEX_MODE].set
|| grub_strcmp (state[BACKGROUND_CMD_ARGINDEX_MODE].arg,
"stretch") == 0)
{
if (window.width != grub_video_bitmap_get_width (bitmap)
|| window.height != grub_video_bitmap_get_height (bitmap))
{
struct grub_video_bitmap *scaled_bitmap;
grub_video_bitmap_create_scaled (&scaled_bitmap,
window.width,
window.height,
bitmap,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
if (grub_errno == GRUB_ERR_NONE)
{
/* Replace the original bitmap with the scaled one. */
grub_video_bitmap_destroy (bitmap);
bitmap = scaled_bitmap;
}
}
}
/* If bitmap was loaded correctly, display it. */
if (bitmap)
{
/* Determine bitmap dimensions. */
bitmap_width = grub_video_bitmap_get_width (bitmap);
bitmap_height = grub_video_bitmap_get_height (bitmap);
/* Mark whole screen as dirty. */
dirty_region_add (0, 0, window.width, window.height);
}
}
/* All was ok. */
grub_errno = GRUB_ERR_NONE;
return grub_errno;
}
static struct grub_term_output grub_video_term =
{
.name = "gfxterm",
.init = grub_gfxterm_term_init,
.fini = grub_gfxterm_term_fini,
.putchar = grub_gfxterm_putchar,
.getcharwidth = grub_gfxterm_getcharwidth,
.getwh = grub_virtual_screen_getwh,
.getxy = grub_virtual_screen_getxy,
.gotoxy = grub_gfxterm_gotoxy,
.cls = grub_gfxterm_cls,
.setcolorstate = grub_virtual_screen_setcolorstate,
.setcursor = grub_gfxterm_setcursor,
.refresh = grub_gfxterm_refresh,
.flags = GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS,
.normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR,
.highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR,
.next = 0
};
static grub_extcmd_t background_image_cmd_handle;
GRUB_MOD_INIT(gfxterm)
{
grub_term_register_output ("gfxterm", &grub_video_term);
background_image_cmd_handle =
grub_register_extcmd ("background_image",
grub_gfxterm_background_image_cmd,
GRUB_COMMAND_FLAG_BOTH,
N_("[-m (stretch|normal)] FILE"),
N_("Load background image for active terminal."),
background_image_cmd_options);
}
GRUB_MOD_FINI(gfxterm)
{
grub_unregister_extcmd (background_image_cmd_handle);
grub_term_unregister_output (&grub_video_term);
}
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