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

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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);