SDL.Cairo.Image.Render

This module provides functions for directly/indirectly rendering a JuicyPixel's Image onto a sdl2's Texture.

This module is actually implemented with both of Render and Canvas, therefore it provides functions in both way. In fact, There are three simple ways to use this module. Assume we alread have following code,

import SDL
import Linear.V2 (V2(..))
import SDL.Cairo
import SDL.Cairo.Canvas
import SDL.Cairo.Image.Renderer
import Codec.Picture

main :: IO ()
main = do
  initialize [InitEverything]
  window <- createWindow "SDL2 Cairo Canvas" defaultWindow
  renderer <- createRenderer window (-1) defaultRenderer
  texture <- createCairoTexture' renderer window
  withCanvas texture $ do
    background $ gray 102
    -- location A

  Right (ImageRGB8 img) <- readPng "pic.png"
  -- location B

  copy renderer texture Nothing Nothing
  present renderer
  delay 5000

using renderImgCanvas

The first way to draw image is replacing

-- location A

by

renderImgCanvas (V2 50 50) img

using drawImg or drawImgC

The other ways are replacing

-- location B

by

drawImg texture (V2 50 50) img

or

drawImgC texture (V2 50 50) img

draw Image in IO ()

drawImg

Arguments

:: RenderablePixel a

=> Texture

a Texture

-> V2 Int

a V2 coordinate of the top left corner

-> Image a

an Image

-> IO ()

draw a JuicyPixel Image on the given SDL Texture (at the specified coordinate).

drawImgC

Arguments

:: RenderablePixelC a

=> Texture

a Texture

-> V2 Int

a V2 coordinate of the top left corner

-> Image a

an Image

-> IO ()

draw a JuicyPixel Image on the given SDL Texture (at the specified coordinate). Using Cairo's Render underneath.

draw Image in Canvas ()

renderImgCanvas

Arguments

:: RenderablePixel a

=> V2 Int

a V2 coordinate of the top left corner

-> Image a

an Image

-> Canvas ()

a Canvas action

render an JuicyPixel Image through Cairo Canvas

draw Image in Render ()

renderImgCairo

Arguments

:: RenderablePixelC a

=> V2 Int

a V2 coordinate of the top left corner

-> Image a

a JuicyPixel Image

-> Render ()

an Cairo Render action

render an Image through Cairo Render

renderOnTexture

Arguments

:: Texture

target Texture

-> Render ()

a Render action

-> IO ()

perform a Render action on the given Texture

Type class

class Pixel px => RenderablePixel px where

A pixel structure is RenderablePixel if how to draw on Canvas is defined.

Methods

drawPx

Arguments

:: (V2 Int, px)

(coordinate, pixel)

-> Canvas ()

Instances

RenderablePixel PixelRGB8

RenderablePixel PixelRGB16

RenderablePixel PixelRGBA8

RenderablePixel PixelRGBA16

class Pixel px => RenderablePixelC px where

A pixel structure is RenderablePixelC if how to render on Render can be provided.

Methods

renderPx

Arguments

:: (V2 Int, px)

(coordinate, pixel)

-> Render ()

Instances

RenderablePixelC PixelRGB8

RenderablePixelC PixelRGB16

RenderablePixelC PixelRGBA8

RenderablePixelC PixelRGBA16