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hw/display/artist: Fix invalidation of lines near screen border 

If parts of the invalidated screen lines are outside of the VRAM buffer,
the code skips the whole invalidate. This is incorrect when only parts
of the buffer are invisble - which is the case when the mouse cursor is
located near the screen border.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Sven Schnelle 2020-08-08 20:51:57 +02:00 committed by Helge Deller
parent f9e9f71490
commit 2f8cd51547
1 changed files with 6 additions and 1 deletions
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7
hw/display/artist.c
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@ -206,7 +206,12 @@ static void artist_invalidate_lines(struct vram_buffer *buf,
int starty, int height)
{
int start = starty * buf->width;
int size = height * buf->width;
int size;
if (starty + height > buf->height)
height = buf->height - starty;
size = height * buf->width;
if (start + size <= buf->size) {
memory_region_set_dirty(&buf->mr, start, size);