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module Chelleport.Draw where
import Chelleport.Types
import Chelleport.Utils (intToCInt)
import Control.Monad.Reader (MonadIO, MonadReader (ask))
import Data.Text (Text)
import qualified Data.Vector.Storable as Vector
import Data.Word (Word8)
import Foreign.C (CInt)
import SDL (($=))
import qualified SDL
import qualified SDL.Font as TTF
class (Monad m) => MonadDraw m where
drawLine :: (CInt, CInt) -> (CInt, CInt) -> m ()
drawText :: (CInt, CInt) -> SDL.V4 Word8 -> Text -> m (CInt, CInt)
drawCircle :: Int -> (CInt, CInt) -> m ()
setDrawColor :: SDL.V4 Word8 -> m ()
windowSize :: m (SDL.V2 CInt)
instance (MonadIO m) => MonadDraw (AppM m) where
drawLine (x1, y1) (x2, y2) = do
DrawContext {ctxRenderer = renderer} <- ask
SDL.drawLine renderer (SDL.P $ SDL.V2 x1 y1) (SDL.P $ SDL.V2 x2 y2)
setDrawColor color = do
DrawContext {ctxRenderer = renderer} <- ask
SDL.rendererDrawColor renderer $= color
drawText (x, y) color text = do
DrawContext {ctxRenderer = renderer, ctxFont = font} <- ask
surface <- TTF.blended font color text
texture <- SDL.createTextureFromSurface renderer surface
SDL.freeSurface surface
-- Get text dimensions
textureInfo <- SDL.queryTexture texture
let textWidth = SDL.textureWidth textureInfo
let textHeight = SDL.textureHeight textureInfo
-- Render the texture
SDL.copy renderer texture Nothing $
Just (SDL.Rectangle (SDL.P $ SDL.V2 x y) (SDL.V2 textWidth textHeight))
SDL.destroyTexture texture
pure (textWidth, textHeight)
drawCircle radius (x, y) = do
DrawContext {ctxRenderer = renderer} <- ask
let renderedPoints = radius * 7
let toTheta n = fromIntegral n * (2 * pi) / fromIntegral renderedPoints
let toPointOnCircle n =
SDL.V2
(x + round ((fromIntegral radius :: Float) * cos (toTheta n)))
(y + round ((fromIntegral radius :: Float) * sin (toTheta n)))
let points = Vector.generate renderedPoints (SDL.P . toPointOnCircle)
SDL.drawPoints renderer points
windowSize = ask >>= SDL.get . SDL.windowSize . ctxWindow
cellSize :: (MonadDraw m) => State -> m (CInt, CInt)
cellSize (State {stateGrid}) = do
(SDL.V2 width height) <- windowSize
let wcell = width `div` intToCInt (length $ head stateGrid)
let hcell = height `div` intToCInt (length stateGrid)
pure (wcell, hcell)
drawHorizontalLine :: (MonadDraw m) => CInt -> m ()
drawHorizontalLine y = do
(SDL.V2 width _) <- windowSize
drawLine (0, y) (width, y)
drawVerticalLine :: (MonadDraw m) => CInt -> m ()
drawVerticalLine x = do
(SDL.V2 _width height) <- windowSize
drawLine (x, 0) (x, height)
colorWhite :: SDL.V4 Word8
colorWhite = SDL.V4 255 255 255 255
colorLightGray :: SDL.V4 Word8
colorLightGray = SDL.V4 100 100 100 255
colorGray :: SDL.V4 Word8
colorGray = SDL.V4 55 52 65 200
colorAccent :: SDL.V4 Word8
colorAccent = SDL.V4 110 112 247 255
colorHighlight :: SDL.V4 Word8
colorHighlight = colorAccent
colorGridLines :: SDL.V4 Word8
colorGridLines = colorGray
colorFocusLines :: SDL.V4 Word8
colorFocusLines = colorLightGray
colorAxisLines :: SDL.V4 Word8
colorAxisLines = colorAccent
colorBackground :: SDL.V4 Word8
colorBackground = SDL.V4 15 12 25 0
colorFineGrainGrid :: SDL.V4 Word8
colorFineGrainGrid = SDL.V4 55 52 65 100
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