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panel compositor

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Kistaro Windrider 2023-07-30 17:07:10 -07:00
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commit c48d93d567
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pico-8 cartridge // http://www.pico-8.com
version 41
__lua__
-- panel extreme
-- by kistaro windrider
-------------------------------
-- bsd 0-clause license
-------------------------------
-- copyright 2023 kistaro windrider
--
-- permission to use, copy,
-- modify, and/or distribute
-- this software for any
-- purpose with or without fee
-- is hereby granted.
--
-- the software is provided
-- "as is" and the author
-- disclaims all warranties
-- with regard to this software
-- including all implied
-- warranties of merchantability
-- and fitness. in no event
-- shall the author be liable
-- for any special, direct,
-- indirect, or consequential
-- damages or any damages
-- whatsoever resulting from
-- loss of use, data or profits,
-- whether in an action of
-- contract, negligence or
-- other tortious action,
-- arising out of or in
-- connection with the use or
-- performance of this software.
-------------------------------
-- major, release, revision
-- change major version to break
-- save compatibility
version={0,0,1}
-------------------------------
-- globals
-------------------------------
-- mode: table
-- {:update(), :draw()}.
-- receives frame callbacks.
-- version: [3]int constant.
-- major, minor, release.
-- change major version to
-- break save compatibility.
-- constant.
-------------------------------
function _init()
cartdata("panel_extreme"..version[1])
mode = init_title()
end
function _update60()
mode:update()
end
function _draw()
mode:draw()
end
-- for each object in t, invoke
-- t:mname(), converting mname
-- from string to method name.
-- if there is no method by that
-- name, quietly skip it.
function subeach_opt(t, mname)
foreach(t, function(o)
local f = o[mname]
if(f) f(o)
end)
end
-- generate standard "overlay"
-- constructor for type tt.
-- if more is defined, generated
-- new calls more(ret) after
-- ret is definitely not nil
-- before calling setmetatable.
-- use to initialize mutables.
function mknew(tt, more)
local mt = {__index=tt}
-- check "more" only once ever
if more then
tt.new = function(ret)
if (not ret) ret = {}
more(ret)
setmetatable(ret, mt)
return ret
end
else
tt.new=function(ret)
if (not ret) ret = {}
setmetatable(ret, mt)
return ret
end
end
end
-->8
-- title
-- (currently a placeholder)
title = {fidx=1}
mknew(title)
function init_title()
g_animator = animator.new()
return view.of{
bg.new(),
{update=boomer},
g_animator,
titleframe(),
titleframe(),
titleframe(),
titleframe(),
titleframe(),
}
end
boom = {}
mknew(boom)
function boom:update()
self.r += 1
return self.r > 128
end
function boom:draw()
circ(self.x, self.y, self.r, rnd(4)\1+7)
end
function boomer(self)
if rnd() < 0.1 then
g_animator:push_over(
boom.new{
x=rnd(128), y=rnd(128), r=0
})
end
end
function titleframe()
local tx = title.new{fidx=rnd(#titleglow)\1+1}
local v = view.new{
x=rnd(63),
y=rnd(121),
w=53,
h=7,
views={bg.new{c=rnd(64)\1,fp=rnd(32768)*2\1},tx}
}
v.update = function(self)
self.x += rnd() - 0.5
self.y += rnd() - 0.5
local b = btn()
if (b & 0x1 > 0) self.x -= 0.25
if (b & 0x2 > 0) self.x += 0.25
if (b & 0x4 > 0) self.y -= 0.25
if (b & 0x8 > 0) self.y += 0.25
if b & 0x10 > 0 then
self.x -= (self.x-42.5)/10
self.y -= (self.y-60.5)/10
end
if b & 0x20 > 0 then
self.x += (self.x-42.5)/10
self.y += (self.y-60.5)/10
end
view.update(v)
end
return v
end
-- obnoxious flicker effect
titleglow = split"5,6,7,7,7,7,6,5,1,2,8,9,10,7,10,9,4,5,3,3,11,11,7,11,11,7,11,3,3,1,1,1,1,13,13,13,12,12,7,12,13,1"
function title:update()
self.fidx += 0.2
if (self.fidx>#titleglow) self.fidx=1
self.fcol=titleglow[self.fidx\1]
end
function title:draw()
rect(0,0,52,6,8)
print("panel extreme", 1, 1, self.fcol)
end
-->8
-- window manager
-------------------------------
-- view
-------------------------------
-- composits drawable items.
-- add items to .views to
-- composit them. x and y are
-- relative reverse camera
-- offsets. drawable items will
-- observe appropriate incoming
-- camera and clip state.
-- clipping respects existing
-- clipping so stacked views
-- intersect.
-------------------------------
view = {
x=0,
y=0,
w=128,
h=128,
}
mknew(view, function(x)
if (not x.views) x.views = {}
end)
function view.of(subviews)
return view.new{views=subviews}
end
function view:update()
subeach_opt(self.views, "update")
end
function view:draw()
local oldcam, oldclip = $0x5f28, $0x5f20
poke2(0x5f28, %0x5f28-self.x)
poke2(0x5f2a, %0x5f2a-self.y)
clip(-%0x5f28, -%0x5f2a, self.w, self.h, true)
subeach_opt(self.views, "draw")
poke4(0x5f20, oldclip)
poke4(0x5f28, oldcam)
end
-- draws opaque rectangles.
-- default bg is equivalent to
-- clip-aware cls.
-- restores prior fill palette.
bg = {
x=0,y=0,w=128,h=128,fp=0,c=0
}
mknew(bg)
function bg:draw()
local oldfp=fillp(self.fp)
rectfill(self.x,self.y,self.x+self.w,self.y+self.h,self.c)
fillp(oldfp)
end
-------------------------------
-- animator
-------------------------------
-- animator is a drawable item
-- that manages a linked list of
-- temporary drawables. a
-- temporary drawable is dropped
-- when its :update returns
-- a non-false value.
-------------------------------
animator = {}
mknew(animator)
function animator:update()
local p,n=self, self.next
while n do
if n.item:update() then
local nn = n.next
if (not nn) self.tail = p
p.next = n.next
else
p = n
end
n = p.next
end
end
function animator:draw()
local n = self.next
while n do
n.item:draw()
n = n.next
end
end
-- add a new drawable under all
-- existing other items.
-- (it draws first)
function animator:push_under(i)
self.next={next=self.next, item=i}
end
-- add a new drawable over all
-- existing other items.
-- (it draws last)
function animator:push_over(i)
local target, node = self.tail or self, {item=i}
target.next=node
self.tail=node
end
-->8
-- board
__gfx__
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__map__
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