implement FPS meter in Console output

This commit is contained in:
nek0 2023-10-22 06:08:18 +02:00
parent 1b6a6392ba
commit def6e56d1f
2 changed files with 25 additions and 0 deletions

View file

@ -11,9 +11,12 @@ import Control.Monad.Loops
import Control.Monad.IO.Class
import Control.Monad.Trans.Resource
import Data.Bits
import Data.ByteString.Char8
import qualified Data.Map.Strict as M
import Data.Time.Clock
import qualified Data.Vector as V
import qualified SDL hiding (V2)
import System.IO (stdout)
import System.Mem
import qualified Vulkan as Vk
import qualified Vulkan.Zero as Vk
@ -44,6 +47,8 @@ main = do
-- create abort condition for upcoming lop
quit <- liftIO $ STM.newTMVarIO True
time <- liftIO $ STM.newTMVarIO =<< getCurrentTime
average <- liftIO $ STM.newTMVarIO 0
-- main loop
whileM_
@ -51,11 +56,24 @@ main = do
)
( do
liftIO performMajorGC
now <- liftIO getCurrentTime
before <- liftIO $ STM.atomically $ STM.swapTMVar time now
let timeDiff = diffUTCTime now before
fps = recip $ nominalDiffTimeToSeconds timeDiff
liftIO $ hPutStr stdout $ pack $ "Current FPS: " <> show (floor fps) <> " \r"
number <- liftIO $ STM.atomically $ do
number <- STM.readTMVar frameNumber
if number == 0 then
void $ STM.swapTMVar average fps
else do
oldAverage <- STM.readTMVar average
let newAverage = (oldAverage * fromIntegral number + fps) / frameCount
frameCount = fromIntegral number + 1
void $ STM.swapTMVar average newAverage
void $ STM.swapTMVar frameNumber (succ number)
return number
-- draw
-- liftIO $ putStr $ show (recip $ nominalDiffTimeToSeconds timeDiff) <> "\r"
drawFrame engineData number
-- poll events
evs <- liftIO SDL.pollEvents
@ -69,6 +87,12 @@ main = do
evs
)
fps <- liftIO $ STM.atomically $ STM.readTMVar average
liftIO $ hPutStr stdout $
"\n" <>
"Average FPS: " <> pack (show fps) <> "\n"
Vk.deviceWaitIdle $ engineLogicalDevice engineData
createBufferView

View file

@ -50,6 +50,7 @@ executable vulkan-tutorial
, linear
, monad-loops
, stm
, time
, bytestring
, text
, vector