diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2012-07-04 19:49:54 +0200 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-07-14 10:50:52 +0000 |
| commit | 9aa0ff0bf9588f86846d1045662f5d75b91552cb (patch) | |
| tree | 8362358d0138a52be8b930600a05940ac75bfc67 /hw/vga.c | |
| parent | bf1bed81c9c8e0c2f3b5f16de4757ee2b5fd610a (diff) | |
vga: Implement blinking of text cursor
Let the text cursor blink at 1.875 Hz, the original VGA cursor
frequency. No timer is used, instead we rely on the fact that the
display is updated periodically.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'hw/vga.c')
| -rw-r--r-- | hw/vga.c | 14 |
1 files changed, 12 insertions, 2 deletions
@@ -38,6 +38,9 @@ //#define DEBUG_BOCHS_VBE +/* 16 state changes per vertical frame @60 Hz */ +#define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) + /* * Video Graphics Array (VGA) * @@ -1300,6 +1303,7 @@ static void vga_draw_text(VGACommonState *s, int full_update) uint32_t *ch_attr_ptr; vga_draw_glyph8_func *vga_draw_glyph8; vga_draw_glyph9_func *vga_draw_glyph9; + int64_t now = qemu_get_clock_ms(vm_clock); /* compute font data address (in plane 2) */ v = s->sr[VGA_SEQ_CHARACTER_MAP]; @@ -1370,6 +1374,10 @@ static void vga_draw_text(VGACommonState *s, int full_update) s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; } cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4; + if (now >= s->cursor_blink_time) { + s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2; + s->cursor_visible_phase = !s->cursor_visible_phase; + } depth_index = get_depth_index(s->ds); if (cw == 16) @@ -1390,7 +1398,7 @@ static void vga_draw_text(VGACommonState *s, int full_update) cx_max = -1; for(cx = 0; cx < width; cx++) { ch_attr = *(uint16_t *)src; - if (full_update || ch_attr != *ch_attr_ptr) { + if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) { if (cx < cx_min) cx_min = cx; if (cx > cx_max) @@ -1420,7 +1428,8 @@ static void vga_draw_text(VGACommonState *s, int full_update) font_ptr, cheight, fgcol, bgcol, dup9); } if (src == cursor_ptr && - !(s->cr[VGA_CRTC_CURSOR_START] & 0x20)) { + !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) && + s->cursor_visible_phase) { int line_start, line_last, h; /* draw the cursor */ line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f; @@ -1884,6 +1893,7 @@ static void vga_update_display(void *opaque) } if (graphic_mode != s->graphic_mode) { s->graphic_mode = graphic_mode; + s->cursor_blink_time = qemu_get_clock_ms(vm_clock); full_update = 1; } switch(graphic_mode) { |