push/push.lua at master · Ulydev/push · GitHub

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-- push.lua v0.4

-- 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,

stencil = true

}

setmetatable(push, push)

function push:applySettings(settings)

for k, v in pairs(settings) do

self["_" .. k] = v

end

function push:resetSettings() return self:applySettings(self.defaults) end

function push:setupScreen(WWIDTH, WHEIGHT, RWIDTH, RHEIGHT, settings)

settings = settings or {}

self._WWIDTH, self._WHEIGHT = WWIDTH, WHEIGHT

self._RWIDTH, self._RHEIGHT = RWIDTH, RHEIGHT

self:applySettings(self.defaults) --set defaults first

self:applySettings(settings) --then fill with custom settings

windowUpdateMode(self._RWIDTH, self._RHEIGHT, {

fullscreen = self._fullscreen,

resizable = self._resizable,

highdpi = self._highdpi

})

self:initValues()

if self._canvas then

self:setupCanvas({ "default" }) --setup canvas

end

self._borderColor = {0, 0, 0}

self._drawFunctions = {

["start"] = self.start,

["end"] = self.finish

}

return self

end

function push:setupCanvas(canvases)

table.insert(canvases, { name = "_render", private = true }) --final render

self._canvas = true

self.canvases = {}

for i = 1, #canvases do

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

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

if self.canvases[i].name == name then

return self.canvases[i]

end

function push:setShader(name, shader)

if not shader then

self:getCanvasTable("_render").shader = name

else

self:getCanvasTable(name).shader = shader

end

function push:initValues()

self._PSCALE = (not love11 and self._highdpi) and getDPI() or 1

self._SCALE = {

x = self._RWIDTH/self._WWIDTH * self._PSCALE,

y = self._RHEIGHT/self._WHEIGHT * self._PSCALE

}

if self._stretched then --if stretched, no need to apply offset

self._OFFSET = {x = 0, y = 0}

else

local scale = math.min(self._SCALE.x, self._SCALE.y)

if self._pixelperfect then scale = math.floor(scale) end

self._OFFSET = {x = (self._SCALE.x - scale) * (self._WWIDTH/2), y = (self._SCALE.y - scale) * (self._WHEIGHT/2)}

self._SCALE.x, self._SCALE.y = scale, scale --apply same scale to X and Y

end

self._GWIDTH = self._RWIDTH * self._PSCALE - self._OFFSET.x * 2

self._GHEIGHT = self._RHEIGHT * self._PSCALE - self._OFFSET.y * 2

end

function push:apply(operation, shader)

self._drawFunctions[operation](self, shader)

end

function push:start()

if self._canvas then

love.graphics.push()

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)

love.graphics.push()

love.graphics.scale(self._SCALE.x, self._SCALE.y)

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()

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 do --do not draw _render yet

local _table = self.canvases[i]

if not _table.private then

local _canvas = _table.canvas

local _shader = _table.shader

self:applyShaders(_canvas, type(_shader) == "table" and _shader or { _shader })

end

love.graphics.setCanvas()

--draw render

love.graphics.translate(self._OFFSET.x, self._OFFSET.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.clear()

end

love.graphics.setCanvas()

love.graphics.setShader()

else

love.graphics.pop()

love.graphics.setScissor()

end

function push:setBorderColor(color, g, b)

self._borderColor = g and {color, g, b} or color

end

function push:toGame(x, y)

x, y = x - self._OFFSET.x, y - self._OFFSET.y

local normalX, normalY = x / self._GWIDTH, y / self._GHEIGHT

x = (x >= 0 and x <= self._WWIDTH * self._SCALE.x) and normalX * self._WWIDTH or nil

y = (y >= 0 and y <= self._WHEIGHT * self._SCALE.y) and normalY * self._WHEIGHT or nil

return x, y

end

function push:toReal(x, y)

local realX = self._OFFSET.x + (self._GWIDTH * x)/self._WWIDTH

local realY = self._OFFSET.y + (self._GHEIGHT * y)/self._WHEIGHT

return realX, realY

end

function push:switchFullscreen(winw, winh)

self._fullscreen = not self._fullscreen

local windowWidth, windowHeight = love.window.getDesktopDimensions()

if self._fullscreen then --save windowed dimensions for later

self._WINWIDTH, self._WINHEIGHT = self._RWIDTH, self._RHEIGHT

elseif not self._WINWIDTH or not self._WINHEIGHT then

self._WINWIDTH, self._WINHEIGHT = windowWidth * .5, windowHeight * .5

end

self._RWIDTH = self._fullscreen and windowWidth or winw or self._WINWIDTH

self._RHEIGHT = self._fullscreen and windowHeight or winh or self._WINHEIGHT

self:initValues()

love.window.setFullscreen(self._fullscreen, "desktop")

if not self._fullscreen and (winw or winh) then

windowUpdateMode(self._RWIDTH, self._RHEIGHT) --set window dimensions

end

function push:resize(w, h)

if self._highdpi then w, h = w / self._PSCALE, h / self._PSCALE end

self._RWIDTH = w

self._RHEIGHT = h

self:initValues()

end

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

push/push.lua at master · Ulydev/push · GitHub

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