vitalif
/
mirror_qemu
mirror of https://github.com/proxmox/mirror_qemu
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
master
Jan Kiszka 2012-07-04 19:49:54 +02:00 committed by Blue Swirl
parent bf1bed81c9
commit 9aa0ff0bf9
2 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
hw/vga.c
View File

@ -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) {

2
hw/vga_int.h
View File

@ -156,6 +156,8 @@ typedef struct VGACommonState {
uint32_t last_scr_width, last_scr_height; /* in pixels */
uint32_t last_depth; /* in bits */
uint8_t cursor_start, cursor_end;
bool cursor_visible_phase;
int64_t cursor_blink_time;
uint32_t cursor_offset;
unsigned int (*rgb_to_pixel)(unsigned int r,
unsigned int g, unsigned b);