signage: bring in from external repo
This is b28e6f07aa48f1e2f01eb37bffa180f97a7b03bd from
https://code.hackerspace.pl/q3k/love2d-signage/. We only keep code
commited by inf and q3k, and we're both now licensing this code under
the ISC license, as per COPYING in the root of hscloud.
Change-Id: Ibeee2e6923605e4b1a17a1d295867c056863ef59
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1335
Reviewed-by: informatic <informatic@hackerspace.pl>
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/hswaw/signage/nodes/shadertoy.lua b/hswaw/signage/nodes/shadertoy.lua
new file mode 100644
index 0000000..871ef12
--- /dev/null
+++ b/hswaw/signage/nodes/shadertoy.lua
@@ -0,0 +1,117 @@
+local node = Node:extend('nodes.shadertoy', {})
+
+local smallFont = love.graphics.newFont('fonts/Lato-Light.ttf', 20)
+
+function node:init(config)
+ node.super.init(self, config)
+
+ self.path = self.path or "test.glsl"
+ self.resolution = self.resolution or {1280, 720}
+
+ self:loadShader()
+end
+
+function node:beforeEnter()
+ self:loadShader()
+end
+
+function node:loadShader()
+ local iSystem = {}
+ local header = ""
+ local ender=[[
+ vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
+ vec2 fragCoord = texture_coords * iResolution.xy;
+ mainImage( color, fragCoord );
+ return color;
+ }
+ ]]
+ local file = io.open(self.path, "r")
+ local shaderData = file:read("*all")
+
+ shaderData = string.gsub(shaderData,"texture2D","Texel")
+ shaderData = string.gsub(shaderData,"iTime","iGlobalTime")
+ shaderData = string.gsub(shaderData,"precision highp float;","")
+
+ if string.find(shaderData,"iGlobalTime") then
+ iSystem.iGlobalTime=0
+ if not string.find(shaderData,"number iGlobalTime") then
+ header="extern number iGlobalTime;\n"..header
+ end
+ end
+
+ -- TODO
+ -- if string.find(shaderData,"iChannel") then
+ -- iSystem.iChannel={}
+ -- for k,v in pairs(shaderChannel) do
+ -- header="extern Image iChannel"..k..";\n"..header
+ -- end
+ -- end
+
+ if string.find(shaderData,"iMouse") then
+ iSystem.iMouse = {0, 0, -1, -1}
+ header = "extern vec4 iMouse;\n"..header
+ end
+
+ if string.find(shaderData,"iResolution") then
+ iSystem.iResolution = {self.resolution[1], self.resolution[2],1}
+ header = "extern vec3 iResolution;\n"..header
+ end
+
+ shaderData = header..shaderData
+ if not string.find(shaderData,"vec4 effect") then
+ shaderData = shaderData.."\n"..ender
+ end
+
+ print('Shader loaded')
+
+ self.shaderLoadError = nil
+ shaderLoaded, self.shader = pcall(love.graphics.newShader, shaderData)
+ if not shaderLoaded then
+ print('Shader load failed:', self.shader)
+ self.shaderLoadError = self.shader
+ self.shader = nil
+ else
+ print(shaderLoaded, self.shader)
+ if iSystem.iResolution then
+ self.shader:send("iResolution",iSystem.iResolution)
+ end
+
+ self.iSystem = iSystem
+ self.canvas = love.graphics.newCanvas(self.resolution[1], self.resolution[2])
+ self.renderCanvas = love.graphics.newCanvas(self.resolution[1], self.resolution[2])
+ end
+end
+
+function node:update(dt)
+ if self.shader ~= nil then
+ if self.iSystem.iGlobalTime then
+ self.iSystem.iGlobalTime=self.iSystem.iGlobalTime+dt
+ self.shader:send("iGlobalTime", self.iSystem.iGlobalTime)
+ end
+ end
+end
+
+function node:render()
+ love.graphics.setColor( 0, 0, 0 )
+ love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth(), love.graphics.getHeight())
+
+ if self.shaderLoadError ~= nil then
+ print('render!')
+ love.graphics.setColor(1.0, 0.0, 0.0, 1.0)
+ love.graphics.setFont(smallFont)
+ love.graphics.printf(self.shaderLoadError, 0, 0.1*love.graphics.getHeight(), love.graphics.getWidth(), 'left');
+ elseif self.shader ~= nil then
+ oldCanvas = love.graphics.getCanvas( )
+ love.graphics.setColor( 1.0, 1.0, 1.0 )
+ self.canvas:renderTo(function ()
+ love.graphics.setShader(self.shader)
+ love.graphics.draw(self.renderCanvas)
+ love.graphics.setShader()
+ end)
+ love.graphics.setCanvas(oldCanvas)
+
+ love.graphics.draw(self.canvas,0,0,math.pi,love.graphics.getWidth() / self.resolution[1], love.graphics.getHeight() / self.resolution[2], self.resolution[1], self.resolution[2])
+ end
+end
+
+return node