Upgraded to push v0.4 and updated pong examples

pong-1/main.lua

@@ -69,12 +69,12 @@ end
 ]]
 function love.draw()
     -- begin rendering at virtual resolution
-    push:apply('start')
+    push:start()
 
     -- condensed onto one line from last example
     -- note we are now using virtual width and height now for text placement
     love.graphics.printf('Hello Pong!', 0, VIRTUAL_HEIGHT / 2 - 6, VIRTUAL_WIDTH, 'center')
 
     -- end rendering at virtual resolution
-    push:apply('end')
+    push:finish()
 end

pong-1/push.lua

@@ -1,26 +1,32 @@
--- push.lua v0.2
+-- push.lua v0.4
 
--- Copyright (c) 2017 Ulysse Ramage
+-- Copyright (c) 2020 Ulysse Ramage
 -- Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 -- The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+local love11 = love.getVersion() == 11
+local getDPI = love11 and love.window.getDPIScale or love.window.getPixelScale
+local windowUpdateMode = love11 and love.window.updateMode or function(width, height, settings)
+  local _, _, flags = love.window.getMode()
+  for k, v in pairs(settings) do flags[k] = v end
+  love.window.setMode(width, height, flags)
+end
+
 local push = {
 
   defaults = {
     fullscreen = false,
     resizable = false,
     pixelperfect = false,
     highdpi = true,
-    canvas = true
+    canvas = true,
+    stencil = true
   }
 
 }
 setmetatable(push, push)
 
---TODO: rendering resolution?
---TODO: clean up code
-
 function push:applySettings(settings)
   for k, v in pairs(settings) do
     self["_" .. k] = v
@@ -39,11 +45,11 @@ function push:setupScreen(WWIDTH, WHEIGHT, RWIDTH, RHEIGHT, settings)
   self:applySettings(self.defaults) --set defaults first
   self:applySettings(settings) --then fill with custom settings
 
-  love.window.setMode( self._RWIDTH, self._RHEIGHT, {
+  windowUpdateMode(self._RWIDTH, self._RHEIGHT, {
     fullscreen = self._fullscreen,
     resizable = self._resizable,
     highdpi = self._highdpi
-  } )
+  })
 
   self:initValues()
 
@@ -62,25 +68,31 @@ function push:setupScreen(WWIDTH, WHEIGHT, RWIDTH, RHEIGHT, settings)
 end
 
 function push:setupCanvas(canvases)
-  table.insert(canvases, { name = "_render" }) --final render
+  table.insert(canvases, { name = "_render", private = true }) --final render
 
   self._canvas = true
   self.canvases = {}
 
   for i = 1, #canvases do
-    self.canvases[i] = {
-      name = canvases[i].name,
-      shader = canvases[i].shader,
-      canvas = love.graphics.newCanvas(self._WWIDTH, self._WHEIGHT)
-    }
+    push:addCanvas(canvases[i])
   end
 
   return self
 end
+function push:addCanvas(params)
+  table.insert(self.canvases, {
+    name = params.name,
+    private = params.private,
+    shader = params.shader,
+    canvas = love.graphics.newCanvas(self._WWIDTH, self._WHEIGHT),
+    stencil = params.stencil or self._stencil
+  })
+end
 
 function push:setCanvas(name)
   if not self._canvas then return true end
-  return love.graphics.setCanvas( self:getCanvasTable(name).canvas )
+  local canvasTable = self:getCanvasTable(name)
+  return love.graphics.setCanvas({ canvasTable.canvas, stencil = canvasTable.stencil })
 end
 function push:getCanvasTable(name)
   for i = 1, #self.canvases do
@@ -98,7 +110,7 @@ function push:setShader(name, shader)
 end
 
 function push:initValues()
-  self._PSCALE = self._highdpi and love.window.getPixelScale() or 1
+  self._PSCALE = (not love11 and self._highdpi) and getDPI() or 1
 
   self._SCALE = {
     x = self._RWIDTH/self._WWIDTH * self._PSCALE,
@@ -119,19 +131,15 @@ function push:initValues()
   self._GHEIGHT = self._RHEIGHT * self._PSCALE - self._OFFSET.y * 2
 end
 
---[[ DEPRECATED ]]--
 function push:apply(operation, shader)
-  if operation == "start" then
-    self:start()
-  elseif operation == "finish" or operation == "end" then
-    self:finish(shader)
-  end
+  self._drawFunctions[operation](self, shader)
 end
 
 function push:start()
   if self._canvas then
     love.graphics.push()
-    love.graphics.setCanvas(self.canvases[1].canvas)
+    love.graphics.setCanvas({ self.canvases[1].canvas, stencil = self.canvases[1].stencil })
+
   else
     love.graphics.translate(self._OFFSET.x, self._OFFSET.y)
     love.graphics.setScissor(self._OFFSET.x, self._OFFSET.y, self._WWIDTH*self._SCALE.x, self._WHEIGHT*self._SCALE.y)
@@ -140,32 +148,73 @@ function push:start()
   end
 end
 
+function push:applyShaders(canvas, shaders)
+  local _shader = love.graphics.getShader()
+  if #shaders <= 1 then
+    love.graphics.setShader(shaders[1])
+    love.graphics.draw(canvas)
+  else
+    local _canvas = love.graphics.getCanvas()
+
+    local _tmp = self:getCanvasTable("_tmp")
+    if not _tmp then --create temp canvas only if needed
+      self:addCanvas({ name = "_tmp", private = true, shader = nil })
+      _tmp = self:getCanvasTable("_tmp")
+    end
+
+    love.graphics.push()
+    love.graphics.origin()
+    local outputCanvas
+    for i = 1, #shaders do
+      local inputCanvas = i % 2 == 1 and canvas or _tmp.canvas
+      outputCanvas = i % 2 == 0 and canvas or _tmp.canvas
+      love.graphics.setCanvas(outputCanvas)
+      love.graphics.clear()
+      love.graphics.setShader(shaders[i])
+      love.graphics.draw(inputCanvas)
+      love.graphics.setCanvas(inputCanvas)
+    end
+    love.graphics.pop()
+
+    love.graphics.setCanvas(_canvas)
+    love.graphics.draw(outputCanvas)
+  end
+  love.graphics.setShader(_shader)
+end
+
 function push:finish(shader)
   love.graphics.setBackgroundColor(unpack(self._borderColor))
   if self._canvas then
     local _render = self:getCanvasTable("_render")
 
     love.graphics.pop()
 
-    love.graphics.setColor(255, 255, 255)
+    local white = love11 and 1 or 255
+    love.graphics.setColor(white, white, white)
 
     --draw canvas
     love.graphics.setCanvas(_render.canvas)
-    for i = 1, #self.canvases - 1 do --do not draw _render yet
+    for i = 1, #self.canvases do --do not draw _render yet
       local _table = self.canvases[i]
-      love.graphics.setShader(_table.shader)
-      love.graphics.draw(_table.canvas)
+      if not _table.private then
+        local _canvas = _table.canvas
+        local _shader = _table.shader
+        self:applyShaders(_canvas, type(_shader) == "table" and _shader or { _shader })
+      end
     end
     love.graphics.setCanvas()
-
+    
     --draw render
     love.graphics.translate(self._OFFSET.x, self._OFFSET.y)
-    love.graphics.setShader(shader or self:getCanvasTable("_render").shader)
-    love.graphics.draw(self:getCanvasTable("_render").canvas, 0, 0, 0, self._SCALE.x, self._SCALE.y)
+    local shader = shader or _render.shader
+    love.graphics.push()
+    love.graphics.scale(self._SCALE.x, self._SCALE.y)
+    self:applyShaders(_render.canvas, type(shader) == "table" and shader or { shader })
+    love.graphics.pop()
 
     --clear canvas
     for i = 1, #self.canvases do
-      love.graphics.setCanvas( self.canvases[i].canvas )
+      love.graphics.setCanvas(self.canvases[i].canvas)
       love.graphics.clear()
     end
 
@@ -193,7 +242,7 @@ end
 
 --doesn't work - TODO
 function push:toReal(x, y)
-  return x+self._OFFSET.x, y+self._OFFSET.y
+  return x + self._OFFSET.x, y + self._OFFSET.y
 end
 
 function push:switchFullscreen(winw, winh)
@@ -213,13 +262,12 @@ function push:switchFullscreen(winw, winh)
 
   love.window.setFullscreen(self._fullscreen, "desktop")
   if not self._fullscreen and (winw or winh) then
-    love.window.setMode(self._RWIDTH, self._RHEIGHT) --set window dimensions
+    windowUpdateMode(self._RWIDTH, self._RHEIGHT) --set window dimensions
   end
 end
 
 function push:resize(w, h)
-  local pixelScale = love.window.getPixelScale()
-  if self._highdpi then w, h = w / pixelScale, h / pixelScale end
+  if self._highdpi then w, h = w / self._PSCALE, h / self._PSCALE end
   self._RWIDTH = w
   self._RHEIGHT = h
   self:initValues()
@@ -229,4 +277,4 @@ function push:getWidth() return self._WWIDTH end
 function push:getHeight() return self._WHEIGHT end
 function push:getDimensions() return self._WWIDTH, self._WHEIGHT end
 
-return push
+return push

pong-10/main.lua

@@ -251,11 +251,11 @@ end
 ]]
 function love.draw()
 
-    push:apply('start')
+    push:start()
 
     -- clear the screen with a specific color; in this case, a color similar
     -- to some versions of the original Pong
-    love.graphics.clear(40, 45, 52, 255)
+    love.graphics.clear(40, 45, 52, 0.35)
 
     love.graphics.setFont(smallFont)
 
@@ -287,7 +287,7 @@ function love.draw()
 
     displayFPS()
 
-    push:apply('end')
+    push:finish()
 end
 
 --[[