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make vga screen_dump use DisplayState properly 

Hi all,
currently the vga screen_dump code doesn't use the DisplayState
interface properly and tries to replace it temporarily while taking the
screenshot.
A better approach is to register a DisplayChangeListener, call
vga_hw_update, and finally write the ppm in the next call from dpy_update.

Testing is appreciated.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Stefano Stabellini 2009-08-11 16:18:07 +01:00 committed by Anthony Liguori
parent b6f6d0e2f8
commit 04a52b4120
1 changed files with 21 additions and 69 deletions
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90
hw/vga.c
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@ -150,6 +150,8 @@ static uint16_t expand2[256];
static uint8_t expand4to8[16];
static void vga_screen_dump(void *opaque, const char *filename);
static char *screen_dump_filename;
static DisplayChangeListener *screen_dump_dcl;
static void vga_dumb_update_retrace_info(VGAState *s)
{
@ -2548,9 +2550,13 @@ device_init(vga_register);
/********************************************************/
/* vga screen dump */
static void vga_save_dpy_update(DisplayState *s,
static void vga_save_dpy_update(DisplayState *ds,
int x, int y, int w, int h)
{
if (screen_dump_filename) {
ppm_save(screen_dump_filename, ds->surface);
screen_dump_filename = NULL;
}
}
static void vga_save_dpy_resize(DisplayState *s)
@ -2599,70 +2605,16 @@ int ppm_save(const char *filename, struct DisplaySurface *ds)
return 0;
}
static void vga_screen_dump_blank(VGAState *s, const char *filename)
static DisplayChangeListener* vga_screen_dump_init(DisplayState *ds)
{
FILE *f;
unsigned int y, x, w, h;
unsigned char blank_sample[3] = { 0, 0, 0 };
DisplayChangeListener *dcl;
w = s->last_scr_width;
h = s->last_scr_height;
f = fopen(filename, "wb");
if (!f)
return;
fprintf(f, "P6\n%d %d\n%d\n", w, h, 255);
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
fwrite(blank_sample, 3, 1, f);
}
}
fclose(f);
}
static void vga_screen_dump_common(VGAState *s, const char *filename,
int w, int h)
{
DisplayState *saved_ds, ds1, *ds = &ds1;
DisplayChangeListener dcl;
/* XXX: this is a little hackish */
vga_invalidate_display(s);
saved_ds = s->ds;
memset(ds, 0, sizeof(DisplayState));
memset(&dcl, 0, sizeof(DisplayChangeListener));
dcl.dpy_update = vga_save_dpy_update;
dcl.dpy_resize = vga_save_dpy_resize;
dcl.dpy_refresh = vga_save_dpy_refresh;
register_displaychangelistener(ds, &dcl);
ds->allocator = &default_allocator;
ds->surface = qemu_create_displaysurface(ds, w, h);
s->ds = ds;
s->graphic_mode = -1;
vga_update_display(s);
ppm_save(filename, ds->surface);
qemu_free_displaysurface(ds);
s->ds = saved_ds;
}
static void vga_screen_dump_graphic(VGAState *s, const char *filename)
{
int w, h;
s->get_resolution(s, &w, &h);
vga_screen_dump_common(s, filename, w, h);
}
static void vga_screen_dump_text(VGAState *s, const char *filename)
{
int w, h, cwidth, cheight;
vga_get_text_resolution(s, &w, &h, &cwidth, &cheight);
vga_screen_dump_common(s, filename, w * cwidth, h * cheight);
dcl = qemu_mallocz(sizeof(DisplayChangeListener));
dcl->dpy_update = vga_save_dpy_update;
dcl->dpy_resize = vga_save_dpy_resize;
dcl->dpy_refresh = vga_save_dpy_refresh;
register_displaychangelistener(ds, dcl);
return dcl;
}
/* save the vga display in a PPM image even if no display is
@ -2671,11 +2623,11 @@ static void vga_screen_dump(void *opaque, const char *filename)
{
VGAState *s = (VGAState *)opaque;
if (!(s->ar_index & 0x20))
vga_screen_dump_blank(s, filename);
else if (s->gr[6] & 1)
vga_screen_dump_graphic(s, filename);
else
vga_screen_dump_text(s, filename);
if (!screen_dump_dcl)
screen_dump_dcl = vga_screen_dump_init(s->ds);
screen_dump_filename = (char *)filename;
vga_invalidate_display(s);
vga_hw_update();
}