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-rw-r--r--hw/display/vga.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 69c3e1d674..3991b88aac 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -1434,6 +1434,14 @@ void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
}
}
+static bool vga_scanline_invalidated(VGACommonState *s, int y)
+{
+ if (y >= VGA_MAX_HEIGHT) {
+ return false;
+ }
+ return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f));
+}
+
void vga_sync_dirty_bitmap(VGACommonState *s)
{
memory_region_sync_dirty_bitmap(&s->vram);
@@ -1638,8 +1646,8 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
page1 = addr + bwidth - 1;
update |= memory_region_get_dirty(&s->vram, page0, page1 - page0,
DIRTY_MEMORY_VGA);
- /* explicit invalidation for the hardware cursor */
- update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
+ /* explicit invalidation for the hardware cursor (cirrus only) */
+ update |= vga_scanline_invalidated(s, y);
if (update) {
if (y_start < 0)
y_start = y;
@@ -1686,7 +1694,7 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
page_max - page_min,
DIRTY_MEMORY_VGA);
}
- memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
+ memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table));
}
static void vga_draw_blank(VGACommonState *s, int full_update)