trying out some new postshaders from mari0, fixed a couple bugs

examples/complex.lua

@@ -32,7 +32,7 @@ function initScene()
 end
 
 function love.load()
-    love.graphics.setBackgroundColor(0, 0, 0)
+  love.graphics.setBackgroundColor(0, 0, 0)
 	love.graphics.setDefaultFilter("nearest", "nearest")
 
 	-- load image font
@@ -367,19 +367,17 @@ function drawBackground(l,t,w,h)
 end
 
 function drawForground(l,t,w,h)
-	for i = 1, phyCnt do
-		math.randomseed(i)
-		love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
-		if phyLight[i]:getType() == "polygon" then
-			love.graphics.polygon("fill", phyLight[i]:getPoints())
-		elseif phyLight[i]:getType() == "circle" then
-			love.graphics.circle("fill", phyLight[i]:getX(), phyLight[i]:getY(), phyLight[i]:getRadius())
-		end
-	end
-
 	love.graphics.setBlendMode("alpha")
 	for i = 1, phyCnt do
-		if phyLight[i]:getType() == "image" then
+		if phyLight[i]:getType() == "polygon" then
+      math.randomseed(i)
+      love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
+			love.graphics.polygon("fill", phyLight[i]:getPoints())
+		elseif phyLight[i]:getType() == "circle" then
+      math.randomseed(i)
+      love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
+			love.graphics.circle("fill", phyLight[i]:getX(), phyLight[i]:getY(), phyLight[i]:getRadius())
+    elseif phyLight[i]:getType() == "image" then
 			if normalOn and phyLight[i].normal then
 				love.graphics.setColor(255, 255, 255)
 				love.graphics.draw(phyLight[i].normal, phyLight[i].x - phyLight[i].nx, phyLight[i].y - phyLight[i].ny)
@@ -390,10 +388,6 @@ function drawForground(l,t,w,h)
 			end
 		end
 	end
-
-	if not normalOn then
-		lightWorld:drawMaterial(l,t,w,h)
-	end
 end
 
 function love.mousepressed(x, y, c)
@@ -415,7 +409,12 @@ function love.mousepressed(x, y, c)
 		-- add rectangle
 		math.randomseed(love.timer.getTime())
 		phyCnt = phyCnt + 1
-		phyLight[phyCnt] = lightWorld:newPolygon()
+		phyLight[phyCnt] = lightWorld:newPolygon({
+     x, y,
+     x+16, y,
+     x+16, y+16,
+     x, y+16
+    })
 		phyBody[phyCnt] = love.physics.newBody(physicWorld, x, y, "dynamic")
 		phyShape[phyCnt] = love.physics.newRectangleShape(0, 0, math.random(32, 64), math.random(32, 64))
 		phyFixture[phyCnt] = love.physics.newFixture(phyBody[phyCnt], phyShape[phyCnt])

examples/short.lua

@@ -3,6 +3,7 @@ local gamera     = require "vendor/gamera"
 local LightWorld = require "lib/light_world"
 
 function love.load()
+  testShader = 0
   scale = 1
   camera = gamera.new(0,0,2000,2000)
 	-- load images
@@ -14,10 +15,11 @@ function love.load()
 	-- create light world
 	lightWorld = LightWorld({
     drawBackground = drawBackground,
-    drawForground = drawForground
+    drawForground = drawForground,
+    ambient = {15,15,15},
+    refractionStrength = 32.0,
+    reflectionVisibility = 0.75,
   })
-	lightWorld:setAmbientColor(15, 15, 31)
-	lightWorld:setRefractionStrength(32.0)
 
 	-- create light
 	lightMouse = lightWorld:newLight(0, 0, 255, 127, 63, 300)
@@ -37,6 +39,26 @@ function love.load()
 	objectTest:setReflection(true)
 end
 
+function love.keypressed(k)
+  if k == "1" then
+    lightWorld.post_shader:toggleEffect("4colors", {15, 56, 15}, {48, 98, 48}, {139, 172, 15}, {155, 188, 15})
+  elseif k == "2" then
+    lightWorld.post_shader:toggleEffect("monochrome")
+  elseif k == "3" then
+    lightWorld.post_shader:toggleEffect("scanlines")
+  elseif k == "4" then
+    lightWorld.post_shader:toggleEffect("tiltshift", 4.0)
+  elseif k == "5" then
+		lightWorld.post_shader:toggleEffect("bloom", 2.0, 0.25)
+  elseif k == "6" then
+		lightWorld.post_shader:toggleEffect("blur", 2.0, 2.0)
+		--lightWorld.post_shader:addEffect("chromatic", math.sin(lightDirection * 10.0) * colorAberration, math.cos(lightDirection * 10.0) * colorAberration, math.cos(lightDirection * 10.0) * colorAberration, math.sin(lightDirection * 10.0) * -colorAberration, math.sin(lightDirection * 10.0) * colorAberration, math.cos(lightDirection * 10.0) * -colorAberration)
+  elseif k == "7" then
+    testShader = testShader + 1
+		lightWorld.post_shader:addEffect("test", testShader)
+  end
+end
+
 function love.update(dt)
 	love.window.setTitle("Light vs. Shadow Engine (FPS:" .. love.timer.getFPS() .. ")")
 

lib/body.lua

@@ -363,6 +363,7 @@ function body:setShadowType(type, ...)
     self:refresh()
   elseif self.shadowType == "polygon" then
     self.data = args or {0, 0, 0, 0, 0, 0}
+    print(self.data)
   elseif self.shadowType == "image" then
     if self.img then
       self.width = self.imgWidth

lib/light.lua

@@ -23,11 +23,12 @@ function light:init(x, y, r, g, b, range)
 	self.glowSize = 0.1
 	self.glowStrength = 0.0
 	self.visible = true
-  self:refresh(1)
+  self:refresh()
 end
 
-function light:refresh(scale)
+function light:refresh(w, h)
-  local w, h = love.window.getWidth(), love.window.getHeight()
+  w, h = w or love.window.getWidth(), h or love.window.getHeight()
+
 	self.shadow = love.graphics.newCanvas(w, h)
 	self.shine  = love.graphics.newCanvas(w, h)
 end

lib/light_world.lua

@@ -59,7 +59,7 @@ function light_world:init(options)
   options = options or {}
   for k, v in pairs(options) do self[k] = v end
 
-  self:refreshScreenSize(1)
+  self:refreshScreenSize()
 end
 
 function light_world:drawBlur(blendmode, blur, canvas, canvas2, l, t, w, h)
@@ -209,9 +209,9 @@ function light_world:updateRelfection(l,t,w,h)
   love.graphics.setCanvas(self.render_buffer)
 end
 
-function light_world:refreshScreenSize(scale)
+function light_world:refreshScreenSize(w, h)
-  local w, h = love.window.getWidth(), love.window.getHeight()
+  w, h = w or love.window.getWidth(), h or love.window.getHeight()
-  self.scale = scale
+
 	self.render_buffer    = love.graphics.newCanvas(w, h)
 	self.shadow           = love.graphics.newCanvas(w, h)
 	self.shadow2          = love.graphics.newCanvas(w, h)
@@ -233,15 +233,18 @@ function light_world:refreshScreenSize(scale)
   self.reflectionShader:send("screen", {w, h})
 
   for i = 1, #self.lights do
-    self.lights[i]:refresh(scale)
+    self.lights[i]:refresh(w, h)
   end
+
+  self.post_shader:refreshScreenSize(w, h)
 end
 
 function light_world:draw(l,t,w,h,s)
   l,t,w,h,s = (l or 0), (t or 0), (w or love.graphics.getWidth()), (h or love.graphics.getHeight()), s or 1 
 
   if s ~= self.scale then
-    --self:refreshScreenSize(s)
+    --self:refreshScreenSize(w, h)
+    self.scale = scale
   end
 
   local last_buffer = love.graphics.getCanvas()
@@ -253,6 +256,7 @@ function light_world:draw(l,t,w,h,s)
     self.drawBackground(  sl,st,sw,sh,s)
     self:drawShadow(      sl,st,sw,sh,s)
     self.drawForground(   sl,st,sw,sh,s)
+		self:drawMaterial(    sl,st,sw,sh,s)
     self:drawShine(       sl,st,sw,sh,s)
     self:drawPixelShadow( sl,st,sw,sh,s)
     self:drawGlow(        sl,st,sw,sh,s)
@@ -260,7 +264,7 @@ function light_world:draw(l,t,w,h,s)
     self:drawReflection(  sl,st,sw,sh,s)
   love.graphics.pop()
  
-  self.post_shader:drawWith(self.render_buffer, l, t)
+  self.post_shader:drawWith(self.render_buffer, l, t, s)
 end
 
 -- draw shadow

lib/postshader.lua

@@ -27,25 +27,30 @@ local class = require(_PACKAGE..'/class')
 local post_shader = class()
 post_shader.blurv                 = love.graphics.newShader(_PACKAGE.."/shaders/blurv.glsl")
 post_shader.blurh                 = love.graphics.newShader(_PACKAGE.."/shaders/blurh.glsl")
-post_shader.contrast              = love.graphics.newShader(_PACKAGE.."/shaders/contrast.glsl")
+post_shader.contrast              = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/contrast.glsl")
-post_shader.chromatic_aberration  = love.graphics.newShader(_PACKAGE.."/shaders/chromatic_aberration.glsl")
+post_shader.chromatic_aberration  = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/chromatic_aberration.glsl")
-post_shader.four_color            = love.graphics.newShader(_PACKAGE.."/shaders/four_colors.glsl")
+post_shader.four_color            = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/four_colors.glsl")
-post_shader.monochrome            = love.graphics.newShader(_PACKAGE.."/shaders/monochrome.glsl")
+post_shader.monochrome            = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/monochrome.glsl")
-post_shader.scanlines             = love.graphics.newShader(_PACKAGE.."/shaders/scanlines.glsl")
+post_shader.scanlines             = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/scanlines.glsl")
-post_shader.tilt_shift            = love.graphics.newShader(_PACKAGE.."/shaders/tilt_shift.glsl")
+post_shader.tilt_shift            = love.graphics.newShader(_PACKAGE.."/shaders/postshaders/tilt_shift.glsl")
 
 function post_shader:init()
   self:refreshScreenSize()
   self.effects = {}
 end
 
-function post_shader:refreshScreenSize()
+function post_shader:refreshScreenSize(w, h)
-  self.render_buffer = love.graphics.newCanvas()
+  w, h = w or love.window.getWidth(), h or love.window.getHeight()
-  self.back_buffer = love.graphics.newCanvas()
 
-  post_shader.blurv:send("screen", {love.window.getWidth(), love.window.getHeight()})
+  self.render_buffer = love.graphics.newCanvas(w, h)
-  post_shader.blurh:send("screen", {love.window.getWidth(), love.window.getHeight()})
+  self.back_buffer   = love.graphics.newCanvas(w, h)
-  post_shader.scanlines:send("screen", {love.window.getWidth(), love.window.getHeight()})
+
+  post_shader.blurv:send("screen",     {w, h})
+  post_shader.blurh:send("screen",     {w, h})
+  post_shader.scanlines:send("screen", {w, h})
+
+  self.w = w
+  self.h = h
 end
 
 function post_shader:addEffect(shaderName, ...)
@@ -80,6 +85,8 @@ function post_shader:drawWith(canvas, l, t)
       self:drawScanlines(canvas, args)
     elseif shader == "tiltshift" then
       self:drawTiltshift(canvas, args)
+    elseif shader == "test" then
+      self:drawTest(canvas, args)
     end
   end
 
@@ -232,4 +239,50 @@ function post_shader:drawTiltshift(canvas, args)
   love.graphics.draw(self.back_buffer)
 end
 
+local files = love.filesystem.getDirectoryItems(_PACKAGE.."/shaders/postshaders/test")
+local testShaders = {}
+	
+for i,v in ipairs(files) do
+  local name = _PACKAGE.."/shaders/postshaders/test".."/"..v
+  if love.filesystem.isFile(name) then
+    local str = love.filesystem.read(name)
+    local effect = love.graphics.newShader(name)
+    local defs = {}
+    for vtype, extern in str:gmatch("extern (%w+) (%w+)") do
+      defs[extern] = true
+    end
+    testShaders[#testShaders+1] = {effect, defs, name}
+  end
+end
+
+function post_shader:drawTest(canvas, args)
+  local w, h = love.graphics.getWidth(), love.graphics.getHeight()
+  local scale = 1
+  local defaults = {
+    textureSize = {w, h},
+    inputSize = {w, h},
+    outputSize = {w, h},
+    time = love.timer.getTime()
+  }
+
+  love.graphics.setCanvas(self.back_buffer)
+  love.graphics.setBlendMode("alpha")
+
+  local effect = testShaders[args[1]]
+  for def in pairs(effect[2]) do
+    if defaults[def] then
+      effect[1]:send(def, defaults[def])
+    end
+  end
+  print(effect[3])
+  love.graphics.setShader(effect[1])
+  love.graphics.draw(canvas)
+
+  love.graphics.setBlendMode("alpha")
+  love.graphics.setCanvas(canvas)
+  love.graphics.setShader()
+  love.graphics.setColor(255, 255, 255)
+  love.graphics.draw(self.back_buffer)
+end
+
 return post_shader

lib/shaders/postshaders/scanlines.glsl

@@ -25,7 +25,7 @@ vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
 	float green = Texel(texture, vec2(texture_coords.x + offsetX, texture_coords.y - pSize.y * 0.5)).g;
 	float blue = Texel(texture, vec2(texture_coords.x + offsetX, texture_coords.y)).b;
 
-	if(mod(texture_coords.y * screen.y, 2.0) > 0.5) {
+	if(fract(gl_FragCoord.y * (0.5*4.0/3.0)) > 0.5) {
 		return vec4(vec3(red, green, blue) * brightness, 1.0);
 	} else {
 		return vec4(vec3(red * 0.75, green * 0.75, blue * 0.75) * brightness, 1.0);

lib/shaders/postshaders/test/HDR-TV.frag

@@ -0,0 +1,9 @@
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords)
+{
+	vec4 rgb = Texel(texture, texture_coords);
+	vec4 intens = smoothstep(0.2,0.8,rgb) + normalize(vec4(rgb.xyz, 1.0));
+
+	if (fract(pixel_coords.y * 0.5) > 0.5) intens = rgb * 0.8;
+	intens.a = 1.0;
+    return intens;
+}

lib/shaders/postshaders/test/black_and_white.frag

@@ -0,0 +1,24 @@
+extern float exposure = 0.7;
+extern float brightness = 1.0;
+extern vec3 lumacomponents = vec3(1.0, 1.0, 1.0);
+
+
+// luma 
+//const vec3 lumcoeff = vec3(0.299,0.587,0.114);
+const vec3 lumcoeff = vec3(0.212671, 0.715160, 0.072169);
+
+vec4 effect(vec4 vcolor, Image texture, vec2 texcoord, vec2 pixel_coords)
+{	
+	vec4 input0 = Texel(texture, texcoord);
+		
+	//exposure knee	
+	input0 *= (exp2(input0)*vec4(exposure));
+	
+	vec4 lumacomponents = vec4(lumcoeff * lumacomponents, 0.0 );
+	
+	float luminance = dot(input0,lumacomponents);
+	
+	vec4 luma = vec4(luminance);
+
+	return vec4(luma.rgb * brightness, 1.0);
+} 

lib/shaders/postshaders/test/curvature.frag

@@ -0,0 +1,88 @@
+extern vec2 inputSize;
+extern vec2 textureSize;
+
+
+#define distortion 0.2
+
+/*
+#define f 0.6
+#define ox 0.5
+#define oy 0.5
+#define scale 0.8
+#define k1 0.7
+#define k2 -0.5
+
+vec2 barrelDistort(vec2 coord)
+{	
+	vec2 xy = (coord - vec2(ox, oy))/vec2(f) * scale;
+	
+	vec2 r = vec2(sqrt(dot(xy, xy)));
+	
+	float r2 = float(r*r);
+	
+	float r4 = r2*r2;
+	
+	float coeff = (k1*r2 + k2*r4);
+	
+	return ((xy+xy*coeff) * f) + vec2(ox, oy);
+}
+*/
+vec2 radialDistortion(vec2 coord, const vec2 ratio)
+{
+	float offsety = 1.0 - ratio.y;
+	coord.y -= offsety;
+	coord /= ratio;
+	
+	vec2 cc = coord - 0.5;
+	float dist = dot(cc, cc) * distortion;
+	vec2 result = coord + cc * (1.0 + dist) * dist;
+	
+	result *= ratio;
+	result.y += offsety;
+	
+	return result;
+}
+/*
+vec4 checkTexelBounds(Image texture, vec2 coords, vec2 bounds)
+{
+	vec4 color = Texel(texture, coords) * 
+	
+	vec2 ss = step(coords, vec2(bounds.x, 1.0)) * step(vec2(0.0, bounds.y), coords);
+	
+	color.rgb *= ss.x * ss.y;
+	color.a = step(color.a, ss.x * ss.y);
+	
+	return color;
+}*/
+
+vec4 checkTexelBounds(Image texture, vec2 coords, vec2 bounds)
+{
+	vec2 ss = step(coords, vec2(bounds.x, 1.0)) * step(vec2(0.0, bounds.y), coords);
+	return Texel(texture, coords) * ss.x * ss.y;
+}
+
+/*
+vec4 checkTexelBounds(Image texture, vec2 coords)
+{
+	vec2 bounds = vec2(inputSize.x / textureSize.x, 1.0 - inputSize.y / textureSize.y);
+	
+	vec4 color;
+	if (coords.x > bounds.x || coords.x < 0.0 || coords.y > 1.0 || coords.y < bounds.y)
+		color = vec4(0.0, 0.0, 0.0, 1.0);
+	else
+		color = Texel(texture, coords);
+		
+	return color;
+}
+*/
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords)
+{
+	vec2 coords = radialDistortion(texture_coords, inputSize / textureSize);
+	
+	vec4 texcolor = checkTexelBounds(texture, coords, vec2(inputSize.x / textureSize.x, 1.0 - inputSize.y / textureSize.y));
+	texcolor.a = 1.0;
+	
+	return texcolor;
+}
+

lib/shaders/postshaders/test/edges.frag

@@ -0,0 +1,42 @@
+/*
+    Edge shader
+    Author: Themaister
+    License: Public domain.
+    
+    modified by slime73 for use with love2d and mari0
+*/
+
+
+extern vec2 textureSize;
+
+vec3 grayscale(vec3 color)
+{
+	return vec3(dot(color, vec3(0.3, 0.59, 0.11)));
+}
+ 
+vec4 effect(vec4 vcolor, Image texture, vec2 tex, vec2 pixel_coords)
+{
+	vec4 texcolor = Texel(texture, tex);
+	
+	float x = 0.5 / textureSize.x;
+	float y = 0.5 / textureSize.y;
+	vec2 dg1 = vec2( x, y);
+	vec2 dg2 = vec2(-x, y);
+	
+	vec3 c00 = Texel(texture, tex - dg1).xyz;
+	vec3 c02 = Texel(texture, tex + dg2).xyz;
+	vec3 c11 = texcolor.xyz;
+	vec3 c20 = Texel(texture, tex - dg2).xyz;
+	vec3 c22 = Texel(texture, tex + dg1).xyz;
+	
+	vec2 texsize = textureSize;
+	
+	vec3 first = mix(c00, c20, fract(tex.x * texsize.x + 0.5));
+	vec3 second = mix(c02, c22, fract(tex.x * texsize.x + 0.5));
+	
+	vec3 res = mix(first, second, fract(tex.y * texsize.y + 0.5));
+	vec4 final = vec4(5.0 * grayscale(abs(res - c11)), 1.0);
+	return clamp(final, 0.0, 1.0);
+}
+
+

lib/shaders/postshaders/test/phosphor.frag

@@ -0,0 +1,159 @@
+/*
+	caligari's scanlines
+
+	Copyright (C) 2011 caligari
+
+	This program is free software; you can redistribute it and/or modify it
+	under the terms of the GNU General Public License as published by the Free
+	Software Foundation; either version 2 of the License, or (at your option)
+	any later version.
+
+	(caligari gave their consent to have this shader distributed under the GPL
+	in this message:
+
+		http://board.byuu.org/viewtopic.php?p=36219#p36219
+
+		"As I said to Hyllian by PM, I'm fine with the GPL (not really a bi
+		deal...)"
+   )
+*/
+
+extern vec2 textureSize;
+
+
+// 0.5 = the spot stays inside the original pixel
+// 1.0 = the spot bleeds up to the center of next pixel
+#define PHOSPHOR_WIDTH  0.9
+#define PHOSPHOR_HEIGHT 0.65
+
+// Used to counteract the desaturation effect of weighting.
+#define COLOR_BOOST 1.9
+
+// Constants used with gamma correction.
+#define InputGamma 2.4
+#define OutputGamma 2.2
+
+// Uncomment to only draw every third pixel, which highlights the shape
+// of individual (remaining) spots.
+// #define DEBUG
+
+// Uncomment one of these to choose a gamma correction method.
+// If none are uncommented, no gamma correction is done.
+// #define REAL_GAMMA
+#define FAKE_GAMMA
+// #define FAKER_GAMMA
+
+#ifdef REAL_GAMMA
+#define GAMMA_IN(color)     pow(color, vec4(InputGamma))
+#define GAMMA_OUT(color)    pow(color, vec4(1.0 / OutputGamma))
+
+#elif defined FAKE_GAMMA
+/*
+ * Approximations:
+ * for 1<g<2 : x^g ~ ax + bx^2
+ *             where   a=6/(g+1)-2  and b=1-a
+ * for 2<g<3 : x^g ~ ax^2 + bx^3
+ *             where   a=12/(g+1)-3 and b=1-a
+ * for 1<g<2 : x^(1/g) ~ (sqrt(a^2+4bx)-a)
+ *             where   a=6/(g+1)-2  and b=1-a
+ * for 2<g<3 : x^(1/g) ~ (a sqrt(x) + b sqrt(sqrt(x)))
+ *             where   a = 6 - 15g / 2(g+1)  and b = 1-a
+ */
+vec4 A_IN = vec4( 12.0/(InputGamma+1.0)-3.0 );
+vec4 B_IN = vec4(1.0) - A_IN;
+vec4 A_OUT = vec4(6.0 - 15.0 * OutputGamma / 2.0 / (OutputGamma+1.0));
+vec4 B_OUT = vec4(1.0) - A_OUT;
+#define GAMMA_IN(color)     ( (A_IN + B_IN * color) * color * color )
+#define GAMMA_OUT(color)    ( A_OUT * sqrt(color) + B_OUT * sqrt( sqrt(color) ) )
+
+#elif defined FAKER_GAMMA
+vec4 A_IN = vec4(6.0/( InputGamma/OutputGamma + 1.0 ) - 2.0);
+vec4 B_IN = vec4(1.0) - A_IN;
+#define GAMMA_IN(color)     ( (A_IN + B_IN * color) * color )
+#define GAMMA_OUT(color)    color
+
+#else // No gamma correction
+#define GAMMA_IN(color) color
+#define GAMMA_OUT(color) color
+#endif
+
+#ifdef DEBUG
+vec4 grid_color( vec2 coords )
+{
+		vec2 snes = floor( coords * textureSize );
+		if ( (mod(snes.x, 3.0) == 0.0) && (mod(snes.y, 3.0) == 0.0) )
+				return texture2D(_tex0_, coords);
+		else
+				return vec4(0.0);
+}
+#define TEX2D(coords)   GAMMA_IN( grid_color( coords ) )
+
+#else // DEBUG
+#define TEX2D(coords)   GAMMA_IN( texture2D(_tex0_, coords) )
+
+#endif // DEBUG
+
+vec2 onex = vec2( 1.0/textureSize.x, 0.0 );
+vec2 oney = vec2( 0.0, 1.0/textureSize.y );
+
+vec4 effect(vec4 vcolor, Image texture, vec2 texCoord, vec2 pixel_coords)
+{
+	vec2 coords = (texCoord * textureSize);
+	vec2 pixel_start = floor(coords);
+	coords -= pixel_start;
+	vec2 pixel_center = pixel_start + vec2(0.5);
+	vec2 texture_coords = pixel_center / textureSize;
+
+	vec4 color = vec4(0.0);
+	vec4 pixel;
+	vec3 centers = vec3(-0.25,-0.5,-0.75);
+	vec3 posx = vec3(coords.x);
+	vec3 hweight;
+	float vweight;
+	float dx,dy;
+	float w;
+
+	float i,j;
+
+	for (j = -1.0; j<=1.0; j++) {
+			// Vertical weight
+			dy = abs(coords.y - 0.5 - j );
+			vweight = smoothstep(1.0,0.0, dy / PHOSPHOR_HEIGHT);
+
+			if (vweight !=0.0 ) {
+					for ( i = -1.0; i<=1.0; i++ ) {
+							pixel = TEX2D(
+									texture_coords
+									+ i * onex
+									+ j * oney
+							);
+
+							/* Evaluate the distance (in x) from
+							 * the pixel (posx) to the RGB centers
+							 * (~centers):
+							 *      x_red = 0.25
+							 *      x_green = 0.5
+							 *      x_blue = 0.75
+							 * if the distance > PHOSPHOR_WIDTH,
+							 * this pixel doesn't contribute
+							 * otherwise, smoothstep gives the
+							 * weight of the contribution
+							 */
+							hweight = smoothstep(
+									1.0, 0.0,
+									abs((posx + centers - vec3(i))
+											/ vec3(PHOSPHOR_WIDTH))
+							);
+							color.rgb +=
+								pixel.rgb *
+								hweight *
+								vec3(vweight);
+					}
+			}
+	}
+
+	color *= vec4(COLOR_BOOST);
+	color.a = 1.0;
+
+	return clamp(GAMMA_OUT(color), 0.0, 1.0);
+}

lib/shaders/postshaders/test/phosphorish.frag

@@ -0,0 +1,48 @@
+/*
+   Plain (and obviously inaccurate) phosphor.
+   Author: Themaister
+   License: Public Domain
+*/
+// modified by slime73 for use with love pixeleffects
+
+
+extern vec2 textureSize;
+
+vec3 to_focus(float pixel)
+{
+	pixel = mod(pixel + 3.0, 3.0);
+	if (pixel >= 2.0) // Blue
+		return vec3(pixel - 2.0, 0.0, 3.0 - pixel);
+	else if (pixel >= 1.0) // Green
+		return vec3(0.0, 2.0 - pixel, pixel - 1.0);
+	else // Red
+		return vec3(1.0 - pixel, pixel, 0.0);
+}
+
+vec4 effect(vec4 vcolor, Image texture, vec2 texture_coords, vec2 pixel_coords)
+{
+	float y = mod(texture_coords.y * textureSize.y, 1.0);
+	float intensity = exp(-0.2 * y);
+
+	vec2 one_x = vec2(1.0 / (3.0 * textureSize.x), 0.0);
+
+	vec3 color = Texel(texture, texture_coords - 0.0 * one_x).rgb;
+	vec3 color_prev = Texel(texture, texture_coords - 1.0 * one_x).rgb;
+	vec3 color_prev_prev = Texel(texture, texture_coords - 2.0 * one_x).rgb;
+
+	float pixel_x = 3.0 * texture_coords.x * textureSize.x;
+
+	vec3 focus = to_focus(pixel_x - 0.0);
+	vec3 focus_prev = to_focus(pixel_x - 1.0);
+	vec3 focus_prev_prev = to_focus(pixel_x - 2.0);
+
+	vec3 result =
+		0.8 * color * focus +
+		0.6 * color_prev * focus_prev +
+		0.3 * color_prev_prev * focus_prev_prev;
+
+	result = 2.3 * pow(result, vec3(1.4));
+
+	return vec4(intensity * result, 1.0);
+}
+

lib/shaders/postshaders/test/pip.frag

@@ -0,0 +1,66 @@
+#define glarebasesize 0.896
+#define power 0.50
+
+extern vec2 textureSize;
+extern vec2 outputSize;
+
+extern float time;
+
+const vec3 green = vec3(0.17, 0.62, 0.25);
+
+float luminance(vec3 color)
+{
+	return (0.212671 * color.r) + (0.715160 * color.g) + (0.072169 * color.b);
+}
+
+float scanline(float ypos)
+{
+
+	float c = mod(time * 3.0 + ypos * 5.0, 15.0);	
+	return 1.0 - smoothstep(0.0, 1.0, c);
+}
+
+vec4 effect(vec4 vcolor, Image texture, vec2 texcoord, vec2 pixel_coords)
+{
+	vec4 texcolor = Texel(texture, texcoord);
+	
+	vec4 sum = vec4(0.0);
+	vec4 bum = vec4(0.0);
+
+	vec2 glaresize = vec2(glarebasesize) / textureSize;
+	
+	float y_one = 1.0 / outputSize.y;
+	
+	int j;
+	int i;
+
+	for (i = -2; i < 2; i++)
+	{
+		for (j = -1; j < 1; j++)
+		{
+			sum += Texel(texture, texcoord + vec2(-i, j)*glaresize) * power;
+			bum += Texel(texture, texcoord + vec2(j, i)*glaresize) * power;            
+		}
+	}
+	
+	float a = (scanline(texcoord.y) + scanline(texcoord.y + y_one * 1.5) + scanline(texcoord.y - y_one * 1.5)) / 3.0;
+	
+	vec4 finalcolor;
+
+	if (texcolor.r < 2.0)
+	{
+		finalcolor = sum*sum*sum*0.001+bum*bum*bum*0.0080 * (0.8 + 0.05 * a) + texcolor;
+	}
+	else
+	{
+		finalcolor = vec4(0.0, 0.0, 0.0, 1.0);
+	}
+	
+	float lum = pow(luminance(finalcolor.rgb), 1.4);
+	
+	finalcolor.rgb = lum * green + (a * 0.03);
+	finalcolor.a = 1.0;
+	
+	return finalcolor;
+}
+

lib/shaders/postshaders/test/pixellate.frag

@@ -0,0 +1,13 @@
+
+extern vec2 textureSize;
+
+const float pixel_w = 2.0;
+const float pixel_h = 2.0;
+
+vec4 effect(vec4 vcolor, Image texture, vec2 uv, vec2 pixel_coords)
+{
+	float dx = pixel_w*(1.0/textureSize.x);
+	float dy = pixel_h*(1.0/textureSize.y);
+	vec2 coord = vec2(dx*floor(uv.x/dx), dy*floor(uv.y/dy));
+	return Texel(texture, coord);
+}

lib/shaders/postshaders/test/radialblur.frag

@@ -0,0 +1,21 @@
+#define nsamples 5
+
+extern number blurstart = 1.0; // 0 to 1
+extern number blurwidth = -0.02; // -1 to 1
+
+
+vec4 effect(vec4 vcolor, Image texture, vec2 texture_coords, vec2 pixel_coords)
+{
+	vec4 c = vec4(0.0, 0.0, 0.0, 1.0);
+	
+	int i;
+	for (i = 0; i < nsamples; i++)
+	{
+		number scale = blurstart + blurwidth * (i / float(nsamples-1));
+		c.rgb += Texel(texture, texture_coords * scale).rgb;
+	}
+	
+	c.rgb /= nsamples;
+	
+	return c;
+}

lib/shaders/postshaders/test/waterpaint.frag

@@ -0,0 +1,57 @@
+/*
+     Themaister's Waterpaint shader
+
+     Placed in the public domain. 
+
+     (From this thread: http://board.byuu.org/viewtopic.php?p=30483#p30483 
+     PD declaration here: http://board.byuu.org/viewtopic.php?p=30542#p30542 )
+     
+     modified by slime73 for use with love2d and mari0
+*/
+
+ 
+vec4 compress(vec4 in_color, float threshold, float ratio)
+{
+	vec4 diff = in_color - vec4(threshold);
+	diff = clamp(diff, 0.0, 100.0);
+	return in_color - (diff * (1.0 - 1.0/ratio));
+}
+ 
+extern vec2 textureSize;
+ 
+vec4 effect(vec4 vcolor, Image texture, vec2 tex, vec2 pixel_coords)
+{
+	float x = 0.5 * (1.0 / textureSize.x);
+	float y = 0.5 * (1.0 / textureSize.y);
+	
+	vec2 dg1 = vec2( x, y);
+	vec2 dg2 = vec2(-x, y);
+	vec2 dx = vec2(x, 0.0);
+	vec2 dy = vec2(0.0, y);
+	 	
+	vec3 c00 = Texel(texture, tex - dg1).xyz;
+	vec3 c01 = Texel(texture, tex - dx).xyz;
+	vec3 c02 = Texel(texture, tex + dg2).xyz;
+	vec3 c10 = Texel(texture, tex - dy).xyz;
+	vec3 c11 = Texel(texture, tex).xyz;
+	vec3 c12 = Texel(texture, tex + dy).xyz;
+	vec3 c20 = Texel(texture, tex - dg2).xyz;
+	vec3 c21 = Texel(texture, tex + dx).xyz;
+	vec3 c22 = Texel(texture, tex + dg1).xyz;
+
+	vec2 texsize = textureSize;
+	
+	vec3 first = mix(c00, c20, fract(tex.x * texsize.x + 0.5));
+	vec3 second = mix(c02, c22, fract(tex.x * texsize.x + 0.5));
+	
+	vec3 mid_horiz = mix(c01, c21, fract(tex.x * texsize.x + 0.5));
+	vec3 mid_vert = mix(c10, c12, fract(tex.y * texsize.y + 0.5));
+	
+	vec3 res = mix(first, second, fract(tex.y * texsize.y + 0.5));
+	vec4 final = vec4(0.26 * (res + mid_horiz + mid_vert) + 3.5 * abs(res - mix(mid_horiz, mid_vert, 0.5)), 1.0);
+	
+	final = compress(final, 0.8, 5.0);
+	final.a = 1.0;
+	
+	return final;
+}