mirror/86Box
1
0
Fork 0
mirror of https://github.com/86Box/86Box.git synced 2026-02-22 01:25:33 -07:00
Code Issues Packages Projects Releases Activity

(S)VGA render: Make sure the overscan is not blitted to a line whose pointer is NULL, fixes #6591.

Browse Source
This commit is contained in:
OBattler
2025-12-23 00:22:00 +01:00
parent 4d9cfdd57f
commit 1275f13d68
1 changed files with 10 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/video/vid_svga_render.c
View File

@@ -91,7 +91,7 @@ svga_render_blank(svga_t *svga)
line_width -= svga->x_add;
}
if (((svga->hdisp + svga->scrollcache) > 0) && (line_width >= 0))
if ((line_ptr != NULL) && ((svga->hdisp + svga->scrollcache) > 0) && (line_width >= 0))
memset(line_ptr, 0, line_width);
}
@@ -106,7 +106,7 @@ svga_render_overscan_left(svga_t *svga)
uint32_t *line_ptr = svga->monitor->target_buffer->line[svga->displine + svga->y_add];
if (svga->x_add >= 0) for (int i = 0; i < svga->x_add; i++)
if ((line_ptr != NULL) && (svga->x_add >= 0)) for (int i = 0; i < svga->x_add; i++)
*line_ptr++ = svga->overscan_color;
}
@@ -121,10 +121,15 @@ svga_render_overscan_right(svga_t *svga)
if (svga->scrblank || (svga->hdisp <= 0))
return;
uint32_t *line_ptr = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add + svga->hdisp];
uint32_t *line_ptr = svga->monitor->target_buffer->line[svga->displine + svga->y_add];
right = overscan_x - svga->left_overscan;
for (int i = 0; i < right; i++)
*line_ptr++ = svga->overscan_color;
if (line_ptr != NULL) {
line_ptr += svga->x_add + svga->hdisp;
for (int i = 0; i < right; i++)
*line_ptr++ = svga->overscan_color;
}
}
void