From 16295884d20067662e4c6c03dd48f629fefdf95e Mon Sep 17 00:00:00 2001
From: Miku AuahDark <auahdark687291@gmail.com>
Date: Fri, 5 Jan 2018 21:33:28 +0800
Subject: [PATCH] LLP beatmap converter

- Invoke via `love livesim2 llpbeatmap <beatmapname>`
---
 AquaShineConfig.lua |  1 +
 docs/Storyboard.md  | 20 +++++++++++++++
 livesim.lua         | 58 +++++++++++++++++++++++++++++++------------
 tollp.lua           | 60 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 124 insertions(+), 15 deletions(-)
 create mode 100644 tollp.lua

diff --git a/AquaShineConfig.lua b/AquaShineConfig.lua
index 6b99fbf3..687d2d33 100644
--- a/AquaShineConfig.lua
+++ b/AquaShineConfig.lua
@@ -17,6 +17,7 @@ return {
 		about = {0, "about_screen.lua"},
 		render = {3, "render_livesim.lua"},
 		noteloader = {1, "invoke_noteloader.lua"},
+		llpbeatmap = {1, "tollp.lua"},
 		unit_create = {0, "unit_create.lua"},
 	},
 	-- Default entry point to be used if there's none specificed in command-line
diff --git a/docs/Storyboard.md b/docs/Storyboard.md
index f6d99140..d8c6de01 100644
--- a/docs/Storyboard.md
+++ b/docs/Storyboard.md
@@ -390,6 +390,26 @@ Check whenever the notes is randomized.
 
 Returns: `false` if the notes is not randomized, `true` otherwise.
 
+*************************************************
+
+### `Shader ... SetPostProcessingShader(Shader ...)`
+
+Set post-processing shader chain
+
+Parameters:
+
+* `...` - New shaders to be used as post-processing (in order). Pass empty value to unset.
+
+Returns: Previous `Shader` objects (or `nil` if no shader is used)
+
+*************************************************
+
+### `number, number GetScreenDimensions()`
+
+Get the screen dimensions
+
+Returns: Screen dimensions (width and height)
+
 Storyboard Callback Functions
 =============================
 
diff --git a/livesim.lua b/livesim.lua
index 2d400d3d..193290e4 100644
--- a/livesim.lua
+++ b/livesim.lua
@@ -513,16 +513,27 @@ function DEPLS.StoryboardFunctions._SetColorRange(r)
 	DEPLS.DefaultColorMode = r
 end
 
---! @brief Set post-processing shader
---! @param shader New shader to be used as post-processing
---! @returns Previous shader
-function DEPLS.StoryboardFunctions.SetPostProcessingShader(shader)
-	if type(shader) == nil or (type(shader) == "userdata" and shader:typeOf("Shader")) then
-		local sh = DEPLS.PostShader
-		DELS.PostShader = shader
-		return sh
+--! @brief Set post-processing shaders
+--! @param ... New shaders to be used as post-processing
+--! @returns Previous shaders
+function DEPLS.StoryboardFunctions.SetPostProcessingShader(...)
+	local arg = {...}
+	local prev = DEPLS.PostShader
+	
+	if #arg == 0 then
+		DEPLS.PostShader = nil
+	else		
+		for i = 1, #arg do
+			assert(type(arg[i]) == "userdata" and arg[i]:typeOf("Shader"), "Invalid value passed")
+		end
+		
+		DEPLS.PostShader = arg
+	end
+	
+	if prev then
+		return unpack(prev)
 	else
-		error("bad argument #2 to 'SetPostProcessingShader' (Invalid shader)", 2)
+		return nil
 	end
 end
 
@@ -1158,12 +1169,28 @@ function DEPLS.Draw(deltaT)
 	end
 	
 	graphics.pop()
-	graphics.push()
-	graphics.origin()
-	graphics.setShader(DEPLS.PostShader)
-	graphics.draw(DEPLS.MainCanvas)
-	graphics.setShader()
-	graphics.pop()
+	return DEPLS.PostProcessingDraw()
+end
+
+-- Post-processing draw. Shaders can be chained here
+function DEPLS.PostProcessingDraw()
+	love.graphics.push()
+	love.graphics.origin()
+	
+	if DEPLS.PostShader then
+		for i = 1, #DEPLS.PostShader do
+			love.graphics.setCanvas(DEPLS.SecondaryCanvas)
+			love.graphics.clear()
+			love.graphics.setShader(DEPLS.PostShader[i])
+			love.graphics.draw(DEPLS.MainCanvas)
+			DEPLS.MainCanvas, DEPLS.SecondaryCanvas = DEPLS.SecondaryCanvas, DEPLS.MainCanvas
+		end
+		love.graphics.setShader()
+		love.graphics.setCanvas(AquaShine.MainCanvas)
+	end
+	
+	love.graphics.draw(DEPLS.MainCanvas)
+	love.graphics.pop()
 end
 
 -- LOVE2D mouse/touch pressed
@@ -1309,6 +1336,7 @@ end
 
 function DEPLS.Resize(w, h)
 	DEPLS.MainCanvas = love.graphics.newCanvas()
+	DEPLS.SecondaryCanvas = love.graphics.newCanvas()
 end
 
 function DEPLS.Exit()
diff --git a/tollp.lua b/tollp.lua
new file mode 100644
index 00000000..6f01995f
--- /dev/null
+++ b/tollp.lua
@@ -0,0 +1,60 @@
+-- Beatmap converter: To LLPractice
+-- Part of Live Simulator: 2
+-- See copyright notice in main.lua
+
+local AquaShine = ...
+local JSON = require("JSON")
+local NoteLoader = AquaShine.LoadModule("note_loader2")
+local ToLLP = {}
+local epsilon = 0.001
+
+function ToLLP.CheckSimulNote(lane, timing)
+	for i = 1, 9 do
+		if lane[i] then
+			local n = lane[i]
+			
+			for j = 1, #n do
+				if math.abs(n[j].starttime - timing) <= epsilon then
+					return true
+				end
+			end
+		end
+	end
+	
+	return false
+end
+
+function ToLLP.Start(arg)
+	local noteloader_data = NoteLoader.NoteLoader(assert("beatmap/"..arg[1]))
+	local llpdata = {}
+	--llpdata.speed = tonumber(arg[2]) or 160
+	--llpdata.audiofile = arg[1]
+	llpdata.lane = {}
+	
+	for i, v in ipairs(noteloader_data:GetNotesList()) do
+		local laneidx = 10 - v.position
+		local lane = llpdata.lane[laneidx]
+		
+		if not(lane) then
+			lane = {}
+			llpdata.lane[laneidx] = lane
+		end
+		
+		local note = table.new(0, 6)
+		local long = v.effect % 10 == 3
+		-- time units is in ms for LLP
+		note.starttime = v.timing_sec * 1000
+		note.endtime = note.starttime + (long and v.effect_value or 0) * 1000
+		note.longnote = long
+		note.parallel = ToLLP.CheckSimulNote(llpdata.lane, note.starttime)
+		note.lane = laneidx - 1
+		note.hold = false
+		
+		lane[#lane + 1] = note
+	end
+	
+	io.write(JSON:encode(llpdata), "\n")
+	love.event.quit()
+end
+
+return ToLLP