diff options
| -rw-r--r-- | backends/msmouse.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/backends/msmouse.c b/backends/msmouse.c index b1e1bea62b..aeb905562d 100644 --- a/backends/msmouse.c +++ b/backends/msmouse.c @@ -35,6 +35,7 @@ typedef struct { QemuInputHandlerState *hs; int axis[INPUT_AXIS__MAX]; bool btns[INPUT_BUTTON__MAX]; + bool btnc[INPUT_BUTTON__MAX]; uint8_t outbuf[32]; int outlen; } MouseState; @@ -62,7 +63,7 @@ static void msmouse_chr_accept_input(CharDriverState *chr) static void msmouse_queue_event(MouseState *mouse) { unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 }; - int dx, dy; + int dx, dy, count = 3; dx = mouse->axis[INPUT_AXIS_X]; mouse->axis[INPUT_AXIS_X] = 0; @@ -78,14 +79,16 @@ static void msmouse_queue_event(MouseState *mouse) /* Buttons */ bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT] ? 0x20 : 0x00); bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT] ? 0x10 : 0x00); - bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00); - - if (mouse->outlen <= sizeof(mouse->outbuf) - 4) { - /* We always send the packet of, so that we do not have to keep track - of previous state of the middle button. This can potentially confuse - some very old drivers for two button mice though. */ - memcpy(mouse->outbuf + mouse->outlen, bytes, 4); - mouse->outlen += 4; + if (mouse->btns[INPUT_BUTTON_MIDDLE] || + mouse->btnc[INPUT_BUTTON_MIDDLE]) { + bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00); + mouse->btnc[INPUT_BUTTON_MIDDLE] = false; + count = 4; + } + + if (mouse->outlen <= sizeof(mouse->outbuf) - count) { + memcpy(mouse->outbuf + mouse->outlen, bytes, count); + mouse->outlen += count; } else { /* queue full -> drop event */ } @@ -107,6 +110,7 @@ static void msmouse_input_event(DeviceState *dev, QemuConsole *src, case INPUT_EVENT_KIND_BTN: btn = evt->u.btn.data; mouse->btns[btn->button] = btn->down; + mouse->btnc[btn->button] = true; break; default: |