haraldwolff/qemu-patch-raspberry4
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blanking support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@726 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-04-15 22:28:04 +00:00
parent 95917e3f57
commit 2aebb3eb2b
1 changed files with 50 additions and 6 deletions
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56
hw/vga.c
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@ -109,7 +109,8 @@ typedef struct VGAState {
uint32_t line_compare;
uint32_t start_addr;
uint8_t last_cw, last_ch;
uint32_t last_width, last_height;
uint32_t last_width, last_height; /* in chars or pixels */
uint32_t last_scr_width, last_scr_height; /* in pixels */
uint8_t cursor_start, cursor_end;
uint32_t cursor_offset;
unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned b);
@ -1155,7 +1156,9 @@ static void vga_draw_text(VGAState *s, int full_update)
}
if (width != s->last_width || height != s->last_height ||
cw != s->last_cw || cheight != s->last_ch) {
dpy_resize(s->ds, width * cw, height * cheight);
s->last_scr_width = width * cw;
s->last_scr_height = height * cheight;
dpy_resize(s->ds, s->last_scr_width, s->last_scr_height);
s->last_width = width;
s->last_height = height;
s->last_ch = cheight;
@ -1412,6 +1415,8 @@ static void vga_draw_graphic(VGAState *s, int full_update)
if (disp_width != s->last_width ||
height != s->last_height) {
dpy_resize(s->ds, disp_width, height);
s->last_scr_width = disp_width;
s->last_scr_height = height;
s->last_width = disp_width;
s->last_height = height;
full_update = 1;
@ -1494,6 +1499,33 @@ static void vga_draw_graphic(VGAState *s, int full_update)
}
}
static void vga_draw_blank(VGAState *s, int full_update)
{
int i, w, val;
uint8_t *d;
if (!full_update)
return;
if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
return;
if (s->ds->depth == 8)
val = s->rgb_to_pixel(0, 0, 0);
else
val = 0;
w = s->last_scr_width * ((s->ds->depth + 7) >> 3);
d = s->ds->data;
for(i = 0; i < s->last_scr_height; i++) {
memset(d, val, w);
d += s->ds->linesize;
}
dpy_update(s->ds, 0, 0,
s->last_scr_width, s->last_scr_height);
}
#define GMODE_TEXT 0
#define GMODE_GRAPH 1
#define GMODE_BLANK 2
void vga_update_display(void)
{
VGAState *s = &vga_state;
@ -1519,15 +1551,27 @@ void vga_update_display(void)
}
full_update = 0;
graphic_mode = s->gr[6] & 1;
if (!(s->ar_index & 0x20)) {
graphic_mode = GMODE_BLANK;
} else {
graphic_mode = s->gr[6] & 1;
}
if (graphic_mode != s->graphic_mode) {
s->graphic_mode = graphic_mode;
full_update = 1;
}
if (graphic_mode)
vga_draw_graphic(s, full_update);
else
switch(graphic_mode) {
case GMODE_TEXT:
vga_draw_text(s, full_update);
break;
case GMODE_GRAPH:
vga_draw_graphic(s, full_update);
break;
case GMODE_BLANK:
default:
vga_draw_blank(s, full_update);
break;
}
}
}