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add multi-touch support for Android input module
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@chrox
chrox committed May 28, 2014
1 parent 7cd25f3 commit 34a26b3
Showing 1 changed file with 108 additions and 81 deletions.
189 changes: 108 additions & 81 deletions ffi/input_android.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -16,94 +16,121 @@ local inputQueue = {}

local ev_time = ffi.new("struct timeval")
local function genEmuEvent(evtype, code, value)
ffi.C.gettimeofday(ev_time, nil)
local ev = {
type = tonumber(evtype),
code = tonumber(code),
value = tonumber(value),
time = { sec = tonumber(ev_time.tv_sec), usec = tonumber(ev_time.tv_usec) }
}
table.insert(inputQueue, ev)
ffi.C.gettimeofday(ev_time, nil)
local ev = {
type = tonumber(evtype),
code = tonumber(code),
value = tonumber(value),
time = { sec = tonumber(ev_time.tv_sec), usec = tonumber(ev_time.tv_usec) }
}
table.insert(inputQueue, ev)
end

local is_in_touch = false
local function genTouchDownEvent(event, id)
local x = ffi.C.AMotionEvent_getX(event, id)
local y = ffi.C.AMotionEvent_getY(event, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_SLOT, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_TRACKING_ID, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_X, x)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_Y, y)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
end

local function genTouchUpEvent(event, id)
local x = ffi.C.AMotionEvent_getX(event, id)
local y = ffi.C.AMotionEvent_getY(event, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_SLOT, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_TRACKING_ID, -1)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_X, x)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_Y, y)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
end

local function genTouchMoveEvent(event, id)
local x = ffi.C.AMotionEvent_getX(event, id)
local y = ffi.C.AMotionEvent_getY(event, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_SLOT, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_X, x)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_Y, y)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
end

local is_in_touch = false
local function motionEventHandler(motion_event)
local action = ffi.C.AMotionEvent_getAction(motion_event)
local flags = bit.band(action, ffi.C.AMOTION_EVENT_ACTION_MASK)
if flags == ffi.C.AMOTION_EVENT_ACTION_DOWN then
is_in_touch = true
local id = ffi.C.AMotionEvent_getPointerId(motion_event, 0)
local x = ffi.C.AMotionEvent_getX(motion_event, id)
local y = ffi.C.AMotionEvent_getY(motion_event, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_TRACKING_ID, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_X, x)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_Y, y)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_UP then
is_in_touch = false
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_TRACKING_ID, -1)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_MOVE then
if is_in_touch then
local id = ffi.C.AMotionEvent_getPointerId(motion_event, 0)
local x = ffi.C.AMotionEvent_getX(motion_event, id)
local y = ffi.C.AMotionEvent_getY(motion_event, id)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_X, x)
genEmuEvent(ffi.C.EV_ABS, ffi.C.ABS_MT_POSITION_Y, y)
genEmuEvent(ffi.C.EV_SYN, ffi.C.SYN_REPORT, 0)
end
end
local action = ffi.C.AMotionEvent_getAction(motion_event)
local pointer_count = ffi.C.AMotionEvent_getPointerCount(motion_event)
local pointer_index = bit.rshift(
bit.band(action, ffi.C.AMOTION_EVENT_ACTION_POINTER_INDEX_MASK),
ffi.C.AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT)
local id = ffi.C.AMotionEvent_getPointerId(motion_event, pointer_index)
local flags = bit.band(action, ffi.C.AMOTION_EVENT_ACTION_MASK)
if flags == ffi.C.AMOTION_EVENT_ACTION_DOWN then
is_in_touch = true
genTouchDownEvent(motion_event, id)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_POINTER_DOWN then
is_in_touch = true
genTouchDownEvent(motion_event, id)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_UP then
is_in_touch = false
genTouchUpEvent(motion_event, id)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_POINTER_UP then
is_in_touch = false
genTouchUpEvent(motion_event, id)
elseif flags == ffi.C.AMOTION_EVENT_ACTION_MOVE then
if is_in_touch then
genTouchMoveEvent(motion_event, id)
end
end
end

function input.waitForEvent(usecs)
local timeout = math.ceil(usecs and usecs/1000 or -1)
while true do
-- check for queued events
if #inputQueue > 0 then
-- return oldest FIFO element
return table.remove(inputQueue, 1)
end
local events = ffi.new("int[1]")
local source = ffi.new("struct android_poll_source*[1]")
local poll_state = ffi.C.ALooper_pollAll(timeout, nil, events, ffi.cast("void**", source))
if poll_state >= 0 then
if source[0] ~= nil then
--source[0].process(android.app, source[0])
if source[0].id == ffi.C.LOOPER_ID_MAIN then
local cmd = ffi.C.android_app_read_cmd(android.app)
ffi.C.android_app_pre_exec_cmd(android.app, cmd)
android.LOGI("got command: " .. tonumber(cmd))
if cmd == ffi.C.APP_CMD_INIT_WINDOW then
fb:refresh()
elseif cmd == ffi.C.APP_CMD_TERM_WINDOW then
-- do nothing for now
elseif cmd == ffi.C.APP_CMD_LOST_FOCUS then
-- do we need this here?
fb:refresh()
end
ffi.C.android_app_post_exec_cmd(android.app, cmd)
elseif source[0].id == ffi.C.LOOPER_ID_INPUT then
local event = ffi.new("AInputEvent*[1]")
while ffi.C.AInputQueue_getEvent(android.app.inputQueue, event) >= 0 do
if ffi.C.AInputQueue_preDispatchEvent(android.app.inputQueue, event[0]) == 0 then
if ffi.C.AInputEvent_getType(event[0]) == ffi.C.AINPUT_EVENT_TYPE_MOTION then
motionEventHandler(event[0])
end
ffi.C.AInputQueue_finishEvent(android.app.inputQueue, event[0], 1)
end
end
end
end
if android.app.destroyRequested ~= 0 then
android.LOGI("Engine thread destroy requested!")
error("application forced to quit")
return
end
elseif poll_state == ffi.C.ALOOPER_POLL_TIMEOUT then
error("Waiting for input failed: timeout\n")
end
end
local timeout = math.ceil(usecs and usecs/1000 or -1)
while true do
-- check for queued events
if #inputQueue > 0 then
-- return oldest FIFO element
return table.remove(inputQueue, 1)
end
local events = ffi.new("int[1]")
local source = ffi.new("struct android_poll_source*[1]")
local poll_state = ffi.C.ALooper_pollAll(timeout, nil, events, ffi.cast("void**", source))
if poll_state >= 0 then
if source[0] ~= nil then
--source[0].process(android.app, source[0])
if source[0].id == ffi.C.LOOPER_ID_MAIN then
local cmd = ffi.C.android_app_read_cmd(android.app)
ffi.C.android_app_pre_exec_cmd(android.app, cmd)
android.LOGI("got command: " .. tonumber(cmd))
if cmd == ffi.C.APP_CMD_INIT_WINDOW then
fb:refresh()
elseif cmd == ffi.C.APP_CMD_TERM_WINDOW then
-- do nothing for now
elseif cmd == ffi.C.APP_CMD_LOST_FOCUS then
-- do we need this here?
fb:refresh()
end
ffi.C.android_app_post_exec_cmd(android.app, cmd)
elseif source[0].id == ffi.C.LOOPER_ID_INPUT then
local event = ffi.new("AInputEvent*[1]")
while ffi.C.AInputQueue_getEvent(android.app.inputQueue, event) >= 0 do
if ffi.C.AInputQueue_preDispatchEvent(android.app.inputQueue, event[0]) == 0 then
if ffi.C.AInputEvent_getType(event[0]) == ffi.C.AINPUT_EVENT_TYPE_MOTION then
motionEventHandler(event[0])
end
ffi.C.AInputQueue_finishEvent(android.app.inputQueue, event[0], 1)
end
end
end
end
if android.app.destroyRequested ~= 0 then
android.LOGI("Engine thread destroy requested!")
error("application forced to quit")
return
end
elseif poll_state == ffi.C.ALOOPER_POLL_TIMEOUT then
error("Waiting for input failed: timeout\n")
end
end
end

function input.fakeTapInput() end
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