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backend: xrender: fix using of invalid picture when vsync is disabled

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Fixes #974

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2022-12-18 19:23:49 +00:00
parent 1ea3276bd1
commit c28462673e
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GPG key ID: D3A4405BE6CC17F4
1 changed files with 3 additions and 3 deletions
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6
src/backend/xrender/xrender.c
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@ -594,13 +594,13 @@ static void present(backend_t *base, const region_t *region) {
uint16_t region_width = to_u16_checked(extent->x2 - extent->x1), uint16_t region_width = to_u16_checked(extent->x2 - extent->x1),
region_height = to_u16_checked(extent->y2 - extent->y1); region_height = to_u16_checked(extent->y2 - extent->y1);
// compose() sets clip region on the back buffer, so clear it first
x_clear_picture_clip_region(base->c, xd->back[xd->curr_back]);
// limit the region of update // limit the region of update
x_set_picture_clip_region(base->c, xd->back[2], 0, 0, region); x_set_picture_clip_region(base->c, xd->back[2], 0, 0, region);
if (xd->vsync) { if (xd->vsync) {
// compose() sets clip region on the back buffer, so clear it first
x_clear_picture_clip_region(base->c, xd->back[xd->curr_back]);
// Update the back buffer first, then present // Update the back buffer first, then present
xcb_render_composite(base->c, XCB_RENDER_PICT_OP_SRC, xd->back[2], xcb_render_composite(base->c, XCB_RENDER_PICT_OP_SRC, xd->back[2],
XCB_NONE, xd->back[xd->curr_back], orig_x, orig_y, 0, XCB_NONE, xd->back[xd->curr_back], orig_x, orig_y, 0,