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grub/term/gfxterm.c
chaac bee5fe5d09 2009-01-19 Vesa Jääskeläinen <chaac@nic.fi> 
* font/font.c (grub_font_loader_init): Re-position unknown glyph.

	* term/gfxterm.c (write_char): Fix background rendering for wide 
	width glyphs.
2009-01-19 17:09:53 +00:00

1181 lines
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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/normal.h>
#include <grub/font.h>
#include <grub/arg.h>
#include <grub/mm.h>
#include <grub/env.h>
#include <grub/video.h>
#include <grub/bitmap.h>
#define DEFAULT_VIDEO_WIDTH 640
#define DEFAULT_VIDEO_HEIGHT 480
#define DEFAULT_VIDEO_FLAGS 0
#define DEFAULT_BORDER_WIDTH 10
#define DEFAULT_STANDARD_COLOR 0x07
#define DEFAULT_NORMAL_COLOR 0x07
#define DEFAULT_HIGHLIGHT_COLOR 0x70
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. */
grub_uint32_t 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 normal_color_setting;
grub_uint8_t highlight_color_setting;
grub_uint8_t term_color;
/* Color settings. */
grub_video_color_t fg_color;
grub_video_color_t bg_color;
/* Text buffer for virtual screen. Contains (columns * rows) number
of entries. */
struct grub_colored_char *text_buffer;
};
static struct grub_virtual_screen virtual_screen;
static grub_dl_t my_mod;
static struct grub_video_mode_info mode_info;
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
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
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)
{
/* 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;
/* 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.normal_color_setting = DEFAULT_NORMAL_COLOR;
virtual_screen.highlight_color_setting = DEFAULT_HIGHLIGHT_COLOR;
virtual_screen.term_color = virtual_screen.normal_color_setting;
set_term_color (virtual_screen.term_color);
grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
return grub_errno;
}
static grub_err_t
grub_gfxterm_init (void)
{
char *font_name;
char *modevar;
int width = DEFAULT_VIDEO_WIDTH;
int height = DEFAULT_VIDEO_HEIGHT;
int depth = -1;
int flags = DEFAULT_VIDEO_FLAGS;
grub_video_color_t color;
/* Select the font to use. */
font_name = grub_env_get ("gfxterm_font");
if (! font_name)
font_name = ""; /* Allow fallback to any font. */
/* Parse gfxmode environment variable if set. */
modevar = grub_env_get ("gfxmode");
if (modevar)
{
char *tmp;
char *next_mode;
char *current_mode;
char *param;
char *value;
int mode_found = 0;
/* Take copy of env.var. as we don't want to modify that. */
tmp = grub_strdup (modevar);
modevar = tmp;
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
/* Initialize next mode. */
next_mode = modevar;
/* Loop until all modes has been tested out. */
while (next_mode != NULL)
{
/* Use last next_mode as current mode. */
tmp = next_mode;
/* Reset video mode settings. */
width = DEFAULT_VIDEO_WIDTH;
height = DEFAULT_VIDEO_HEIGHT;
depth = -1;
flags = DEFAULT_VIDEO_FLAGS;
/* Save position of next mode and separate modes. */
next_mode = grub_strchr(next_mode, ';');
if (next_mode)
{
*next_mode = 0;
next_mode++;
}
/* Skip whitespace. */
while (grub_isspace (*tmp))
tmp++;
/* Initialize token holders. */
current_mode = tmp;
param = tmp;
value = NULL;
/* Parse <width>x<height>[x<depth>]*/
/* Find width value. */
value = param;
param = grub_strchr(param, 'x');
if (param == NULL)
{
grub_err_t rc;
/* First setup error message. */
rc = grub_error (GRUB_ERR_BAD_ARGUMENT,
"Invalid mode: %s\n",
current_mode);
/* Free memory before returning. */
grub_free (modevar);
return rc;
}
*param = 0;
param++;
width = grub_strtoul (value, 0, 0);
if (grub_errno != GRUB_ERR_NONE)
{
grub_err_t rc;
/* First setup error message. */
rc = grub_error (GRUB_ERR_BAD_ARGUMENT,
"Invalid mode: %s\n",
current_mode);
/* Free memory before returning. */
grub_free (modevar);
return rc;
}
/* Find height value. */
value = param;
param = grub_strchr(param, 'x');
if (param == NULL)
{
height = grub_strtoul (value, 0, 0);
if (grub_errno != GRUB_ERR_NONE)
{
grub_err_t rc;
/* First setup error message. */
rc = grub_error (GRUB_ERR_BAD_ARGUMENT,
"Invalid mode: %s\n",
current_mode);
/* Free memory before returning. */
grub_free (modevar);
return rc;
}
}
else
{
/* We have optional color depth value. */
*param = 0;
param++;
height = grub_strtoul (value, 0, 0);
if (grub_errno != GRUB_ERR_NONE)
{
grub_err_t rc;
/* First setup error message. */
rc = grub_error (GRUB_ERR_BAD_ARGUMENT,
"Invalid mode: %s\n",
current_mode);
/* Free memory before returning. */
grub_free (modevar);
return rc;
}
/* Convert color depth value. */
value = param;
depth = grub_strtoul (value, 0, 0);
if (grub_errno != GRUB_ERR_NONE)
{
grub_err_t rc;
/* First setup error message. */
rc = grub_error (GRUB_ERR_BAD_ARGUMENT,
"Invalid mode: %s\n",
current_mode);
/* Free memory before returning. */
grub_free (modevar);
return rc;
}
}
/* Try out video mode. */
/* If we have 8 or less bits, then assume that it is indexed color mode. */
if ((depth <= 8) && (depth != -1))
flags |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
/* We have more than 8 bits, then assume that it is RGB color mode. */
if (depth > 8)
flags |= GRUB_VIDEO_MODE_TYPE_RGB;
/* If user requested specific depth, forward that information to driver. */
if (depth != -1)
flags |= (depth << GRUB_VIDEO_MODE_TYPE_DEPTH_POS)
& GRUB_VIDEO_MODE_TYPE_DEPTH_MASK;
/* Try to initialize requested mode. Ignore any errors. */
grub_error_push ();
if (grub_video_setup (width, height, flags) != GRUB_ERR_NONE)
{
grub_error_pop ();
continue;
}
/* Figure out what mode we ended up. */
if (grub_video_get_info (&mode_info) != GRUB_ERR_NONE)
{
/* Couldn't get video mode info, restore old mode and continue to next one. */
grub_error_pop ();
grub_video_restore ();
continue;
}
/* Restore state of error stack. */
grub_error_pop ();
/* Mode found! Exit loop. */
mode_found = 1;
break;
}
/* Free memory. */
grub_free (modevar);
if (!mode_found)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"No suitable mode found.");
}
else
{
/* No gfxmode variable set, use defaults. */
/* If we have 8 or less bits, then assume that it is indexed color mode. */
if ((depth <= 8) && (depth != -1))
flags |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
/* We have more than 8 bits, then assume that it is RGB color mode. */
if (depth > 8)
flags |= GRUB_VIDEO_MODE_TYPE_RGB;
/* If user requested specific depth, forward that information to driver. */
if (depth != -1)
flags |= (depth << GRUB_VIDEO_MODE_TYPE_DEPTH_POS)
& GRUB_VIDEO_MODE_TYPE_DEPTH_MASK;
/* Initialize user requested mode. */
if (grub_video_setup (width, height, flags) != GRUB_ERR_NONE)
return grub_errno;
/* Figure out what mode we ended up. */
if (grub_video_get_info (&mode_info) != GRUB_ERR_NONE)
{
grub_video_restore ();
return grub_errno;
}
}
/* 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);
bitmap = 0;
/* Leave borders for virtual screen. */
width = mode_info.width - (2 * DEFAULT_BORDER_WIDTH);
height = mode_info.height - (2 * DEFAULT_BORDER_WIDTH);
/* Create virtual screen. */
if (grub_virtual_screen_setup (DEFAULT_BORDER_WIDTH, DEFAULT_BORDER_WIDTH,
width, height, font_name) != GRUB_ERR_NONE)
{
grub_video_restore ();
return grub_errno;
}
/* Mark whole screen as dirty. */
dirty_region_reset ();
dirty_region_add (0, 0, mode_info.width, mode_info.height);
return (grub_errno = GRUB_ERR_NONE);
}
static grub_err_t
grub_gfxterm_fini (void)
{
if (bitmap)
{
grub_video_bitmap_destroy (bitmap);
bitmap = 0;
}
grub_virtual_screen_free ();
grub_video_restore ();
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_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
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;
/* 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;
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);
}
}
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;
}
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 (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;
redraw_screen_rect (x, y, width, height);
dirty_region_reset ();
}
static void
write_char (void)
{
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;
/* Find out active character. */
p = (virtual_screen.text_buffer
+ virtual_screen.cursor_x
+ (virtual_screen.cursor_y * virtual_screen.columns));
p -= p->index;
/* Get glyph for character. */
glyph = grub_font_get_glyph (virtual_screen.font, p->code);
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 = virtual_screen.cursor_x * virtual_screen.normal_char_width;
y = virtual_screen.cursor_y * 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 (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
/* Mark character to be drawn. */
dirty_region_add (virtual_screen.offset_x + x, virtual_screen.offset_y + y,
width, height);
}
static void
draw_cursor (int show)
{
unsigned int x;
unsigned int y;
unsigned int width;
unsigned int height;
grub_video_color_t color;
/* Determine cursor properties and position on text layer. */
x = virtual_screen.cursor_x * virtual_screen.normal_char_width;
y = (virtual_screen.cursor_y * virtual_screen.normal_char_height
+ grub_font_get_ascent (virtual_screen.font));
width = virtual_screen.normal_char_width;
height = 2;
if (show)
{
color = virtual_screen.fg_color;
}
else
{
color = virtual_screen.bg_color;
y = virtual_screen.cursor_y * virtual_screen.normal_char_height;
height = virtual_screen.normal_char_height;
}
/* 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 (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
/* Mark cursor to be redrawn. */
dirty_region_add (virtual_screen.offset_x + x, virtual_screen.offset_y + y,
width, height);
}
static void
scroll_up (void)
{
unsigned int i;
grub_video_color_t color;
/* If we don't have background bitmap, remove cursor. */
if (!bitmap)
{
/* Remove cursor. */
draw_cursor (0);
/* Redraw only changed regions. */
dirty_region_redraw ();
}
/* 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 = ' ';
virtual_screen.text_buffer[i].fg_color = virtual_screen.fg_color;
virtual_screen.text_buffer[i].bg_color = virtual_screen.bg_color;
virtual_screen.text_buffer[i].width = 0;
virtual_screen.text_buffer[i].index = 0;
}
/* 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);
grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
/* If we have bitmap, re-draw screen, otherwise scroll physical screen too. */
if (bitmap)
{
/* Mark virtual screen to be redrawn. */
dirty_region_add_virtualscreen ();
}
else
{
/* 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);
/* Scroll physical screen. */
grub_video_scroll (color, 0, -virtual_screen.normal_char_height);
/* Draw cursor if visible. */
if (virtual_screen.cursor_state)
draw_cursor (1);
}
}
static void
grub_gfxterm_putchar (grub_uint32_t c)
{
if (c == '\a')
/* FIXME */
return;
if (c == '\b' || c == '\n' || c == '\r')
{
/* Erase current cursor, if any. */
if (virtual_screen.cursor_state)
draw_cursor (0);
switch (c)
{
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;
}
/* Redraw cursor if visible. */
if (virtual_screen.cursor_state)
draw_cursor (1);
}
else
{
struct grub_font_glyph *glyph;
struct grub_colored_char *p;
unsigned char char_width;
/* Erase current cursor, if any. */
if (virtual_screen.cursor_state)
draw_cursor (0);
/* Get properties of the character. */
glyph = grub_font_get_glyph (virtual_screen.font, c);
/* Calculate actual character width for glyph. This is number of
times of normal_font_width. */
char_width = calculate_character_width(glyph);
/* If we are about to exceed line length, wrap to next line. */
if (virtual_screen.cursor_x + char_width > virtual_screen.columns)
grub_putchar ('\n');
/* Find position on virtual screen, and fill information. */
p = (virtual_screen.text_buffer +
virtual_screen.cursor_x +
virtual_screen.cursor_y * virtual_screen.columns);
p->code = c;
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++)
{
p[i].code = ' ';
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++;
}
/* Draw cursor if visible. */
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 (grub_uint32_t c)
{
struct grub_font_glyph *glyph;
unsigned char char_width;
/* Get properties of the character. */
glyph = grub_font_get_glyph (virtual_screen.font, c);
/* Calculate actual character width for glyph. */
char_width = calculate_character_width (glyph);
return char_width;
}
static grub_uint16_t
grub_virtual_screen_getwh (void)
{
return (virtual_screen.columns << 8) | virtual_screen.rows;
}
static grub_uint16_t
grub_virtual_screen_getxy (void)
{
return ((virtual_screen.cursor_x << 8) | virtual_screen.cursor_y);
}
static void
grub_gfxterm_gotoxy (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 (void)
{
grub_uint32_t i;
for (i = 0; i < virtual_screen.columns * virtual_screen.rows; i++)
{
virtual_screen.text_buffer[i].code = ' ';
virtual_screen.text_buffer[i].fg_color = virtual_screen.fg_color;
virtual_screen.text_buffer[i].bg_color = virtual_screen.bg_color;
virtual_screen.text_buffer[i].width = 0;
virtual_screen.text_buffer[i].index = 0;
}
virtual_screen.cursor_x = virtual_screen.cursor_y = 0;
}
static void
grub_gfxterm_cls (void)
{
grub_video_color_t color;
/* Clear virtual screen. */
grub_virtual_screen_cls ();
/* Clear text layer. */
grub_video_set_active_render_target (text_layer);
color = virtual_screen.bg_color;
grub_video_fill_rect (color, 0, 0, mode_info.width, mode_info.height);
grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY);
/* Mark virtual screen to be redrawn. */
dirty_region_add_virtualscreen ();
}
static void
grub_virtual_screen_setcolorstate (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 = virtual_screen.normal_color_setting;
break;
case GRUB_TERM_COLOR_HIGHLIGHT:
virtual_screen.term_color = virtual_screen.highlight_color_setting;
break;
default:
break;
}
/* Change color to virtual terminal. */
set_term_color (virtual_screen.term_color);
}
static void
grub_virtual_screen_setcolor (grub_uint8_t normal_color,
grub_uint8_t highlight_color)
{
virtual_screen.normal_color_setting = normal_color;
virtual_screen.highlight_color_setting = highlight_color;
}
static void
grub_virtual_screen_getcolor (grub_uint8_t *normal_color,
grub_uint8_t *highlight_color)
{
*normal_color = virtual_screen.normal_color_setting;
*highlight_color = virtual_screen.highlight_color_setting;
}
static void
grub_gfxterm_setcursor (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 (void)
{
/* Redraw only changed regions. */
dirty_region_redraw ();
}
static grub_err_t
grub_gfxterm_background_image_cmd (struct grub_arg_list *state __attribute__ ((unused)),
int argc,
char **args)
{
/* 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_reset ();
dirty_region_add (0, 0, mode_info.width, mode_info.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;
/* 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_width (bitmap);
/* Mark whole screen as dirty. */
dirty_region_reset ();
dirty_region_add (0, 0, mode_info.width, mode_info.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_init,
.fini = grub_gfxterm_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,
.setcolor = grub_virtual_screen_setcolor,
.getcolor = grub_virtual_screen_getcolor,
.setcursor = grub_gfxterm_setcursor,
.refresh = grub_gfxterm_refresh,
.flags = 0,
.next = 0
};
GRUB_MOD_INIT(term_gfxterm)
{
my_mod = mod;
grub_term_register_output (&grub_video_term);
grub_register_command ("background_image",
grub_gfxterm_background_image_cmd,
GRUB_COMMAND_FLAG_BOTH,
"background_image",
"Load background image for active terminal",
0);
}
GRUB_MOD_FINI(term_gfxterm)
{
grub_unregister_command ("bgimage");
grub_term_unregister_output (&grub_video_term);
}
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