input: sdl: fix guest_cursor logic.
Unbreaks relative mouse mode with SDL. Reported-by: Gabriel L. Somlo <gsomlo@gmail.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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			@ -455,13 +455,17 @@ static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
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                             real_screen->w);
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        qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
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                             real_screen->h);
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    } else if (guest_cursor) {
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        x -= guest_x;
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        y -= guest_y;
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        guest_x += x;
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        guest_y += y;
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        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, x);
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        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, y);
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    } else {
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        if (guest_cursor) {
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            x -= guest_x;
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            y -= guest_y;
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            guest_x += x;
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            guest_y += y;
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            dx = x;
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            dy = y;
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        }
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        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
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        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
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    }
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    qemu_input_event_sync();
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}
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