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randr: do full transform when checking SetScreenSize size

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When validating the size passed to SetScreenSize, the CRTC mode size
needs to be applied the full CRTC transform, otherwise the check may
bogusly fail.

Do a full transform on the CRTC mode size when checking the
SetScreenSize request size instead of the current code that only
manually handles rotation.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1971>
This commit is contained in:
Icenowy Zheng
2025-05-13 21:34:04 +08:00
committed by Enrico Weigelt, metux IT consult
parent 7f9a56390d
commit 692c3b4557
1 changed files with 7 additions and 10 deletions
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17
randr/rrscreen.c
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@@ -266,17 +266,14 @@ ProcRRSetScreenSize(ClientPtr client)
RRModePtr mode = crtc->mode;
if (!RRCrtcIsLeased(crtc) && mode) {
int source_width = mode->mode.width;
int source_height = mode->mode.height;
Rotation rotation = crtc->rotation;
struct pixman_box16 display_box = {
crtc->x, crtc->y,
crtc->x + mode->mode.width,
crtc->y + mode->mode.height
};
pixman_f_transform_bounds(&crtc->f_transform, &display_box);
if (rotation & (RR_Rotate_90 | RR_Rotate_270)) {
source_width = mode->mode.height;
source_height = mode->mode.width;
}
if (crtc->x + source_width > stuff->width ||
crtc->y + source_height > stuff->height)
if (display_box.x2 > stuff->width || display_box.y2 > stuff->height)
return BadMatch;
}
}