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bochs-display: add dirty tracking support 

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20180522165058.15404-5-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2018-05-22 18:50:56 +02:00
parent 765c942908
commit 33ebad5405
1 changed files with 32 additions and 2 deletions
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34
hw/display/bochs-display.c
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@ -191,10 +191,13 @@ static int bochs_display_get_mode(BochsDisplayState *s,
static void bochs_display_update(void *opaque)
{
BochsDisplayState *s = opaque;
DirtyBitmapSnapshot *snap = NULL;
bool full_update = false;
BochsDisplayMode mode;
DisplaySurface *ds;
uint8_t *ptr;
int ret;
bool dirty;
int y, ys, ret;
ret = bochs_display_get_mode(s, &mode);
if (ret < 0) {
@ -212,9 +215,34 @@ static void bochs_display_update(void *opaque)
mode.stride,
ptr + mode.offset);
dpy_gfx_replace_surface(s->con, ds);
full_update = true;
}
dpy_gfx_update_full(s->con);
if (full_update) {
dpy_gfx_update_full(s->con);
} else {
snap = memory_region_snapshot_and_clear_dirty(&s->vram,
mode.offset, mode.size,
DIRTY_MEMORY_VGA);
ys = -1;
for (y = 0; y < mode.height; y++) {
dirty = memory_region_snapshot_get_dirty(&s->vram, snap,
mode.offset + mode.stride * y,
mode.stride);
if (dirty && ys < 0) {
ys = y;
}
if (!dirty && ys >= 0) {
dpy_gfx_update(s->con, 0, ys,
mode.width, y - ys);
ys = -1;
}
}
if (ys >= 0) {
dpy_gfx_update(s->con, 0, ys,
mode.width, y - ys);
}
}
}
static const GraphicHwOps bochs_display_gfx_ops = {
@ -251,6 +279,8 @@ static void bochs_display_realize(PCIDevice *dev, Error **errp)
pci_set_byte(&s->pci.config[PCI_REVISION_ID], 2);
pci_register_bar(&s->pci, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
pci_register_bar(&s->pci, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio);
memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
}
static bool bochs_display_get_big_endian_fb(Object *obj, Error **errp)