/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2006 Free Software Foundation, Inc. * * 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 program 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 this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #define DEFAULT_VIDEO_WIDTH 640 #define DEFAULT_VIDEO_HEIGHT 480 #define DEFAULT_VIDEO_FLAGS 0 #define DEFAULT_CHAR_WIDTH 8 #define DEFAULT_CHAR_HEIGHT 16 #define DEFAULT_BORDER_WIDTH 10 #define DEFAULT_FG_COLOR 0x0a #define DEFAULT_BG_COLOR 0x00 #define DEFAULT_CURSOR_COLOR 0x0f 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. */ unsigned int width; unsigned int height; /* Offset in the display. */ unsigned int offset_x; unsigned int offset_y; /* TTY Character sizes. */ unsigned int char_width; unsigned int char_height; /* Virtual screen TTY size. */ unsigned int columns; unsigned int rows; /* Current cursor details. */ unsigned int cursor_x; unsigned int cursor_y; int cursor_state; /* Color settings. */ grub_video_color_t fg_color_setting; grub_video_color_t bg_color_setting; grub_video_color_t fg_color; grub_video_color_t bg_color; grub_video_color_t cursor_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 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 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) { /* Free old virtual screen. */ grub_virtual_screen_free (); /* Initialize with default data. */ virtual_screen.width = width; virtual_screen.height = height; virtual_screen.offset_x = x; virtual_screen.offset_y = y; virtual_screen.char_width = DEFAULT_CHAR_WIDTH; virtual_screen.char_height = DEFAULT_CHAR_HEIGHT; 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.char_width; virtual_screen.rows = virtual_screen.height / virtual_screen.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.fg_color_setting = grub_video_map_color (DEFAULT_FG_COLOR); virtual_screen.bg_color_setting = grub_video_map_color (DEFAULT_BG_COLOR); virtual_screen.fg_color = virtual_screen.fg_color_setting; virtual_screen.bg_color = virtual_screen.bg_color_setting; virtual_screen.cursor_color = grub_video_map_color (DEFAULT_CURSOR_COLOR); grub_video_set_active_render_target (GRUB_VIDEO_RENDER_TARGET_DISPLAY); return grub_errno; } static grub_err_t grub_gfxterm_init (void) { 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; /* Parse gfxmode environment variable if set. */ modevar = grub_env_get ("gfxmode"); if (modevar) { char *tmp; char *param; char *value; /* 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; /* Skip whitespace. */ while (grub_isspace (*tmp)) tmp++; /* Initialize token holders. */ param = tmp; value = NULL; /* Parse x[x]*/ /* Find width value. */ value = param; param = grub_strchr(param, 'x'); if (param == NULL) { /* Free memory before returning. */ grub_free (modevar); return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument: %s\n", param); } *param = 0; param++; width = grub_strtoul (value, 0, 0); if (grub_errno != GRUB_ERR_NONE) { /* Free memory before returning. */ grub_free (modevar); return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument: %s\n", param); } /* 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) { /* Free memory before returning. */ grub_free (modevar); return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument: %s\n", param); } } else { /* We have optional color depth value. */ *param = 0; param++; height = grub_strtoul (value, 0, 0); if (grub_errno != GRUB_ERR_NONE) { /* Free memory before returning. */ grub_free (modevar); return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument: %s\n", param); } /* Convert color depth value. */ value = param; depth = grub_strtoul (value, 0, 0); if (grub_errno != GRUB_ERR_NONE) { /* Free memory before returning. */ grub_free (modevar); return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument: %s\n", param); } } /* Free memory. */ grub_free (modevar); } /* If we have 8 or less bits, then assuem 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) 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); /* 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) != 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) { 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); /* Render background layer. */ color = virtual_screen.bg_color; grub_video_fill_rect (color, x, y, width, height); /* Render text layer. */ grub_video_blit_render_target (text_layer, 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; /* 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. */ grub_font_get_glyph (p->code, &glyph); color = p->fg_color; bgcolor = p->bg_color; x = virtual_screen.cursor_x * virtual_screen.char_width; y = virtual_screen.cursor_y * virtual_screen.char_height; /* Render glyph to text layer. */ grub_video_set_active_render_target (text_layer); grub_video_fill_rect (bgcolor, x, y, glyph.width, glyph.height); grub_video_blit_glyph (&glyph, color, x, y); 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, glyph.width, glyph.height); } static void write_cursor (void) { 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.char_width; y = ((virtual_screen.cursor_y + 1) * virtual_screen.char_height) - 3; width = virtual_screen.char_width; height = 2; color = virtual_screen.cursor_color; /* 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; /* 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.char_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_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) write_char (); 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) write_cursor (); } else { struct grub_font_glyph glyph; struct grub_colored_char *p; /* Get properties of the character. */ grub_font_get_glyph (c, &glyph); /* If we are about to exceed line length, wrap to next line. */ if (virtual_screen.cursor_x + glyph.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 = glyph.char_width - 1; p->index = 0; /* If we have large glyph, add fixup info. */ if (glyph.char_width > 1) { unsigned i; for (i = 1; i < glyph.char_width; i++) { p[i].code = ' '; p[i].width = glyph.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 += glyph.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) write_cursor (); } } static grub_ssize_t grub_gfxterm_getcharwidth (grub_uint32_t c) { struct grub_font_glyph glyph; if (! grub_font_get_glyph (c, &glyph)) return 0; return glyph.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; if (virtual_screen.cursor_state) write_char (); virtual_screen.cursor_x = x; virtual_screen.cursor_y = y; if (virtual_screen.cursor_state) write_cursor (); } 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_setting; 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: case GRUB_TERM_COLOR_NORMAL: virtual_screen.fg_color = virtual_screen.fg_color_setting; virtual_screen.bg_color = virtual_screen.bg_color_setting; break; case GRUB_TERM_COLOR_HIGHLIGHT: virtual_screen.fg_color = virtual_screen.bg_color_setting; virtual_screen.bg_color = virtual_screen.fg_color_setting; break; default: break; } } static void grub_virtual_screen_setcolor (grub_uint8_t normal_color, grub_uint8_t highlight_color) { virtual_screen.fg_color_setting = grub_video_map_color (normal_color); virtual_screen.bg_color_setting = grub_video_map_color (highlight_color); } static void grub_gfxterm_setcursor (int on) { if (virtual_screen.cursor_state != on) { if (virtual_screen.cursor_state) write_char (); else write_cursor (); virtual_screen.cursor_state = on; } } static void grub_gfxterm_refresh (void) { /* Redraw only changed regions. */ dirty_region_redraw (); } static struct grub_term grub_video_term = { .name = "gfxterm", .init = grub_gfxterm_init, .fini = grub_gfxterm_fini, .putchar = grub_gfxterm_putchar, .getcharwidth = grub_gfxterm_getcharwidth, .checkkey = grub_console_checkkey, .getkey = grub_console_getkey, .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, .setcursor = grub_gfxterm_setcursor, .refresh = grub_gfxterm_refresh, .flags = 0, .next = 0 }; GRUB_MOD_INIT(term_gfxterm) { my_mod = mod; grub_term_register (&grub_video_term); } GRUB_MOD_FINI(term_gfxterm) { grub_term_unregister (&grub_video_term); }