diff options
Diffstat (limited to 'console-client/vga.c')
| -rw-r--r-- | console-client/vga.c | 124 |
1 files changed, 121 insertions, 3 deletions
diff --git a/console-client/vga.c b/console-client/vga.c index c2d55f87..3cc2135a 100644 --- a/console-client/vga.c +++ b/console-client/vga.c @@ -1,5 +1,5 @@ /* vga.c - The VGA device display driver. - Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. Written by Marcus Brinkmann. This file is part of the GNU Hurd. @@ -93,6 +93,15 @@ struct refchr }; +typedef struct vga_mousecursor +{ + float posx; + float posy; + char oldcolor; + int visible; + int enabled; +} vga_mousecursor_t; + struct vga_display { /* The VGA font for this display. */ @@ -110,6 +119,9 @@ struct vga_display conchar_attr_t cur_conchar_attr; char cur_attr; + /* The state of the mouse cursor. */ + vga_mousecursor_t mousecursor; + /* Remember for each cell on the display the glyph written to it and the colors (in the upper byte) assigned. 0 means unassigned. */ @@ -151,6 +163,37 @@ vga_display_flash (void *handle) return 0; } + +static void +hide_mousecursor (struct vga_display *disp) +{ + char *oldpos = vga_videomem + 2 * ((int) disp->mousecursor.posy * disp->width + + (int) disp->mousecursor.posx) + 1; + + if (!disp->mousecursor.visible) + return; + + /* First remove the old cursor. */ + *oldpos = disp->mousecursor.oldcolor; + disp->mousecursor.visible = 0; +} + + +static void +draw_mousecursor (struct vga_display *disp) +{ + char *newpos = vga_videomem + 2 * ((int) disp->mousecursor.posy * disp->width + + (int) disp->mousecursor.posx) + 1; + + if (disp->mousecursor.visible) + return; + + /* Draw the new cursor. */ + disp->mousecursor.oldcolor = *newpos; + *newpos = (127) ^ *newpos; + + disp->mousecursor.visible = 1; +} static const char doc[] = "VGA Driver"; @@ -344,6 +387,16 @@ vga_display_fini (void *handle, int force) return 0; } + +static void +vga_display_restore_status (void *handle) +{ + /* Read/write in interleaved mode. This is not preserved by the + XFree VESA driver. */ + outb (VGA_GFX_MISC_ADDR, VGA_GFX_ADDR_REG); + outb (VGA_GFX_MISC_CHAINOE | VGA_GFX_MISC_A0TOAF, VGA_GFX_DATA_REG); +} + /* Set the cursor's state to STATE on display HANDLE. */ static error_t @@ -408,6 +461,8 @@ vga_display_scroll (void *handle, int delta) int count = abs(delta) * disp->width; int i; struct refchr *refpos; + + hide_mousecursor (disp); /* XXX: If the virtual console is bigger than the physical console it is impossible to scroll because the data to scroll is not in memory. */ @@ -595,6 +650,7 @@ vga_display_write (void *handle, conchar_t *str, size_t length, struct vga_display *disp = handle; char *pos; struct refchr *refpos = &disp->refmatrix[row][col]; + char *mouse_cursor_pos; /* The starting column is outside the physical screen. */ if (disp->width < current_width && col >= disp->width) @@ -607,6 +663,9 @@ vga_display_write (void *handle, conchar_t *str, size_t length, } pos = vga_videomem + 2 * (row * disp->width + col); + mouse_cursor_pos = (vga_videomem + 2 + * ((int) disp->mousecursor.posy + * disp->width + (int) disp->mousecursor.posx) + 1); /* Although all references to the current fgcol or bgcol could have been released here, for example due to a scroll operation, we @@ -662,6 +721,10 @@ vga_display_write (void *handle, conchar_t *str, size_t length, } *(pos++) = charval & 0xff; + + if (pos == mouse_cursor_pos) + disp->mousecursor.visible = 0; + *(pos++) = disp->cur_attr | (disp->df_size == 512 ? (charval >> 5) & 0x8 : 0); @@ -700,12 +763,65 @@ vga_set_dimension (void *handle, unsigned int width, unsigned int height) return 0; } + +static error_t +vga_display_update (void *handle) +{ + struct vga_display *disp = handle; + + if (disp->mousecursor.enabled) + draw_mousecursor (disp); + + return 0; +} + + +static error_t +vga_set_mousecursor_pos (void *handle, float x, float y) +{ + struct vga_display *disp = handle; + + /* If the mouse did not move from the character position, don't + bother about updating the cursor position. */ + if (disp->mousecursor.visible && x == (int) disp->mousecursor.posx + && y == (int) disp->mousecursor.posy) + return 0; + + hide_mousecursor (disp); + + disp->mousecursor.posx = x; + disp->mousecursor.posy = y; + + if (disp->mousecursor.enabled) + draw_mousecursor (disp); + + return 0; +} + + +static error_t +vga_set_mousecursor_status (void *handle, int status) +{ + struct vga_display *disp = handle; + + disp->mousecursor.enabled = status; + if (!status) + hide_mousecursor (disp); + else + draw_mousecursor (disp); + + return 0; +} + + struct driver_ops driver_vga_ops = { vga_display_init, vga_display_start, vga_display_fini, + NULL, + vga_display_restore_status }; static struct display_ops vga_display_ops = @@ -715,8 +831,10 @@ static struct display_ops vga_display_ops = vga_display_scroll, vga_display_clear, vga_display_write, - NULL, + vga_display_update, vga_display_flash, NULL, - vga_set_dimension + vga_set_dimension, + vga_set_mousecursor_pos, + vga_set_mousecursor_status }; |