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560 lines (456 loc) · 15 KB
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local patchy = {
_VERSION = 'patchy.lua v2.0.0',
_DESCRIPTION = 'Simple 9patch library for LÖVE',
_URL = 'https://github.com/excessive/patchy/tree/master/patchy.lua',
_LICENSE = [[
The MIT License (MIT)
Copyright (c) 2015 Pablo Mayobre, Colby Klein, Landon Manning
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 m = love.getVersion() >= 11 and 255 or 1
local color = function (r, g, b, a)
return math.ceil(r*m), math.ceil(g*m), math.ceil(b*m), math.ceil(a*m)
end
local function isLoveType (object)
if not type(object) == "userdata" or not object.type then
return nil
else
return object:type()
end
end
local function add(state, x, y, w, h, sx, sy, row, col)
state.areas[#state.areas + 1] = {
x = x, -- start x
y = y, -- start y
w = w, -- end x
h = h, -- end y
sx = sx, -- scale on x (bool)
sy = sy, -- scale on y (bool)
row = row, -- row number
col = col, -- col number
}
end
local function vertical(state, x, w, sx, row, first)
local scale_y = state.scale_y
local current_pixel = 0
local col = 0
for i=1, #scale_y do
if scale_y[i].y > current_pixel then
col = col + 1
add(state, x, current_pixel, w, scale_y[i].y - current_pixel, sx, false, row, col)
if first then
state.static.y = state.static.y + scale_y[i].y - current_pixel
end
current_pixel = scale_y[i].y
end
if scale_y[i].y == current_pixel then
col = col + 1
add(state, x, scale_y[i].y, w, scale_y[i].h, sx, true, row, col)
current_pixel = scale_y[i].y + scale_y[i].h
else
error("The start of the vertical line "..i.." comes before another line finishes", 2)
end
end
if current_pixel < state.dimensions.h then
col = col + 1
add(state, x, current_pixel, w, state.dimensions.h - current_pixel, sx, false, row, col)
if first then
state.static.y = state.static.y + state.dimensions.h - current_pixel
end
end
end
local function horizontal(state)
local scale_x = state.scale_x
local current_pixel = 0
local row = 0
for i=1, #scale_x do
-- If scale area is after current pixel
if scale_x[i].x > current_pixel then
row = row + 1
-- If first scale area
if i == 1 then
vertical(state, current_pixel, scale_x[i].x - current_pixel, false, row, true)
else
vertical(state, current_pixel, scale_x[i].x - current_pixel, false, row)
end
-- calculate non-scaled area
state.static.x = state.static.x + scale_x[i].x - current_pixel
-- set current pixel to start of scale area
current_pixel = scale_x[i].x
end
-- If current pixel is the beginning of scale area
if scale_x[i].x == current_pixel then
row = row + 1
-- If first scale area and first scale area begins at 0 (no corner piece)
if i == 1 and row == 1 then
vertical(state, scale_x[i].x, scale_x[i].w, true, row, true)
else
vertical(state, scale_x[i].x, scale_x[i].w, true, row)
end
-- set current pixel to end of scale area
current_pixel = scale_x[i].x + scale_x[i].w
else
error(string.format("The start of the horizontal line %d comes before another line finishes", i), 2)
end
end
-- If current pixel is less than total size of image
if current_pixel < state.dimensions.w then
row = row + 1
vertical(state, current_pixel, state.dimensions.w - current_pixel, false, row)
state.static.x = state.static.x + state.dimensions.w - current_pixel
end
end
-- Content Box (border - padding)
local function get_content_box(p, x, y, w, h, preprocessed)
if not preprocessed then
x, y = (x or 0), (y or 0)
w = math.max((w or 0) - p.static.x, 0) + p.static.x
h = math.max((h or 0) - p.static.y, 0) + p.static.y
end
return x + p.pad[4], y + p.pad[1], w - p.pad[2] - p.pad[4] + p.static.x, h - p.pad[1] - p.pad[3] + p.static.y
end
-- Border Box (content + padding)
local function get_border_box(p, x, y, w, h, preprocessed)
if not preprocessed then
x, y = (x or 0), (y or 0)
w, h = (w or 0), (h or 0)
end
x, y, w, h = x - p.pad[4], y - p.pad[1], w + p.pad[2] + p.pad[4], h + p.pad[1] + p.pad[3]
if not preprocessed then
w = math.max(w - p.static.x, 0) + p.static.x
h = math.max(h - p.static.y, 0) + p.static.x
end
return x, y, w, h
end
local function draw(p, x, y, w, h, content_box)
local skip_update = false
-- If all args match previous draw, no need to update the batch.
if p.last_args then
local ox, oy, ow, oh, ocontent_box = unpack(p.last_args)
if x == ox and y == oy and w == ow and h == oh and content_box == ocontent_box then
skip_update = true
else
p.last_args[1] = x
p.last_args[2] = y
p.last_args[3] = w
p.last_args[4] = h
p.last_args[5] = content_box
end
else
p.last_args = { x, y, w, h, content_box }
end
-- Box Size
x, y = (x or 0), (y or 0)
w, h = (w or 0), (h or 0)
if content_box then -- Content box model
x, y, w, h = get_border_box(p, x, y, w, h, true)
end
w = math.max(w - p.static.x, 0)
h = math.max(h - p.static.y, 0)
-- Content Box
local cx, cy, cw, ch = get_content_box(p, x, y, w, h, true)
if not skip_update then
-- Divide size by scale area
local pax, pay = x, y
local sax, say = w / p.dynamic.x, h / p.dynamic.y
local row, col = 1, 1
for i=1, #p.areas do
if p.areas[i].row > row then
row = p.areas[i].row
pax = pax + p.areas[i - 1].w * (p.areas[i - 1].sx and sax or 1)
end
if p.areas[i].col > col then
col = p.areas[i].col
pay = pay + p.areas[i - 1].h * (p.areas[i - 1].sy and say or 1)
elseif p.areas[i].col == 1 then
col = p.areas[i].col
pay = y
end
if p.areas[i].id then
p.batch:set(p.areas[i].id, p.areas[i].quad, pax, pay, 0, p.areas[i].sx and sax or 1, p.areas[i].sy and say or 1)
end
end
end
love.graphics.draw(p.batch)
if debug_draw then --luacheck: ignore
love.graphics.setColor(255/m, 0/m, 0/m, 255/m)
-- Using get_border_box fixes debug_draw drawing the box littler than how it was
love.graphics.rectangle("line", get_border_box(p, cx, cy, cw, ch))
love.graphics.setColor(0/m, 255/m, 0/m, 255/m)
love.graphics.rectangle("line", cx, cy, cw, ch)
love.graphics.setColor(255/m, 255/m, 255/m, 255/m)
end
-- return content box for lazy people who don't want to call get_content_box again
return cx, cy, cw, ch
end
local function dump (state, filename, save_image)
-- Dumb serialization
local str = [[local metadata = function ()
return {
type = "9patch",
areas = {]]
for _, area in ipairs(state.areas) do
str = str..[[
{
x = ]]..tostring(area.x)..[[,
y = ]]..tostring(area.y)..[[,
w = ]]..tostring(area.w)..[[,
h = ]]..tostring(area.h)..[[,
sx = ]]..tostring(area.sx)..[[,
sy = ]]..tostring(area.sy)..[[,
row = ]]..tostring(area.row)..[[,
col = ]]..tostring(area.col)..[[,
},]]
end
str = str:sub(1, -2) .. [[
},
dimensions = {w = ]] .. tostring(state.dimensions.w) .. ", h = ".. tostring(state.dimensions.h) .. [[},
dynamic = {x = ]] .. tostring(state.dynamic.x) .. ", y = " .. tostring(state.dynamic.y) .. [[},
static = {x = ]] .. tostring(state.static.x) .. ", y = ".. tostring(state.static.y) .. [[},
pad = {]]
for _, padding in ipairs(state.pad) do
str = str .. tostring(padding) .. ","
end
str = str:sub(1, -2) .. [[}
}
end
return metadata]]
-- Save the data in a file
love.filesystem.write(filename or "", str or "")
-- Also save the image if required (and possible)
if save_image and state.imageData then
-- Maybe this should be ".9.png" ?
local name = (filename:match("(.-)%..-$") or "image")..".png"
state.imageData:encode(name)
end
return str
end
local function postprocess(state)
if #state.areas < 1 then
error("There are no areas in this patch", 2)
else
for _, area in ipairs(state.areas) do
if area.w and area.w > 0 and area.h and area.h > 0 then
area.quad = love.graphics.newQuad(area.x, area.y, area.w, area.h, state.dimensions.w, state.dimensions.h)
area.id = state.batch:add(area.quad)
end
end
end
state.draw = draw
state.get_border_box = get_border_box
state.get_content_box = get_content_box
state.dump = dump
return state
end
local function process(patch)
local image = patch.image
if not image then
error("No images for this patch", 2)
end
local _w, _h = image:getDimensions()
local state = {
type = "9patch",
image = image,
batch = patch.batch,
pad = patch.pad,
scale_x = patch.scale_x,
scale_y = patch.scale_y,
areas = {},
static = {x = 0, y = 0},
dimensions = {w = _w, h = _h},
}
horizontal(state)
state.dynamic = {
x = state.dimensions.w - state.static.x,
y = state.dimensions.h - state.static.y,
}
state.scale_x, state.scale_y = nil, nil
return postprocess(state)
end
function patchy.load(data, metadata)
-- *.9.png
local lovetype = isLoveType(data)
if type(data) == "string" or lovetype == "FileData" then
data = love.image.newImageData(data)
lovetype = isLoveType(data)
end
if lovetype ~= "ImageData" then
error("bad argument #1 to 'load' (Image expected, got "..(lovetype or type(data))..")", 2)
end
local w, h = data:getDimensions()
local aw, ah = w-2, h-2
local asset = love.image.newImageData(aw, ah)
asset:paste(data, 0, 0, 1, 1, aw, ah)
local srgb = select(3, love.window.getMode()).srgb
local image = love.graphics.newImage(asset, srgb and "srgb" or nil)
if type(metadata) == "string" then
metadata = love.filesystem.load(metadata)
if not metadata then error("Invalid metadata file passed to 'import'",2) end
metadata = metadata()
end
if type(metadata) == "function" then
metadata = metadata()
end
if metadata and metadata.type == "9patch" then
metadata.image = image
return patchy.import(image, metadata)
end
-- 9patch data
local scale_x, scale_y = {{}}, {{}}
local fill_x, fill_y = {}, {}
-- Scan horizontal rows for 9patch data
for i=0, w - 1 do
-- Top row, scale
local r, g, b, a = color(data:getPixel(i, 0))
-- If we are currently in a scale stream, check to see if we leave it (not black)
if scale_x[#scale_x].x then
if not scale_x[#scale_x].w and (r ~= 0 or g ~=0 or b ~= 0 or a ~= 255) then
scale_x[#scale_x].w = (i - 1) - scale_x[#scale_x].x
end
else
-- If we are not in a scale stream, check to see if we are starting one (black)
if r == 0 and g == 0 and b == 0 and a == 255 then
scale_x[#scale_x].x = i - 1
end
end
-- Bottom row, fill
r, g, b, a = color(data:getPixel(i, h - 1))
-- If we are in a fill stream, check to see if we leave it (not black)
if fill_x.x then
if not fill_x.w and (r ~= 0 or g ~= 0 or b ~= 0 or a ~= 255) then
fill_x.w = (i - 1) - fill_x.x
end
else
-- If we are not in a fill stream, check to see if we are starting one (black)
if r == 0 and g == 0 and b == 0 and a == 255 then
fill_x.x = i - 1
end
end
-- stahp
if scale_x[#scale_x].w then
scale_x[#scale_x + 1] = {}
end
end
-- if the last table is empty (stahp)
if not scale_x[#scale_x].x then
-- if there is only one table, no 9patch data
if #scale_x == 1 then
error("Invalid 9-patch image, it doesnt contain an horizontal line", 2)
else
scale_x[#scale_x] = nil
end
end
-- staaaaahp
if not scale_x[#scale_x].w then
scale_x[#scale_x].w = (w - 1) - scale_x[#scale_x].x
end
-- same as above, but for height!
for i=0, h - 1 do
local r, g, b, a = color(data:getPixel(0, i))
if scale_y[#scale_y].y then
if not scale_y.h and (r ~= 0 or g ~=0 or b ~= 0 or a ~= 255) then
scale_y[#scale_y].h = (i - 1) - scale_y[#scale_y].y
end
else
if r == 0 and g == 0 and b == 0 and a == 255 then
scale_y[#scale_y].y = i - 1
end
end
r, g, b, a = color(data:getPixel(w - 1, i))
if fill_y.y then
if not fill_y.h and (r ~= 0 or g ~= 0 or b ~= 0 or a ~= 255) then
fill_y.h = (i - 1) - fill_y.y
end
else
if r == 0 and g == 0 and b == 0 and a == 255 then
fill_y.y = i - 1
end
end
if scale_y[#scale_y].h then
scale_y[#scale_y + 1] = {}
end
end
if not scale_y[#scale_y].y then
if #scale_y == 1 then
error("Invalid 9-patch image, it doesnt contain a vertical line",2)
else
scale_y[#scale_y] = nil
end
end
if not scale_y[#scale_y].h then
scale_y[#scale_y].h = (h - 1) - scale_y[#scale_y].y
end
-- maaaaath
local scale_w = scale_x[#scale_x].x + scale_x[#scale_x].w - scale_x[1].x
local scale_h = scale_y[#scale_y].y + scale_y[#scale_y].h - scale_y[1].y
fill_x.w = fill_x.x and (fill_x.w and fill_x.w or (w - 1 - fill_x.x)) or scale_w
fill_y.h = fill_y.y and (fill_y.h and fill_y.h or (h - 1 - fill_y.y)) or scale_h
fill_x.x = fill_x.x and fill_x.x or scale_x[1].x
fill_y.y = fill_y.y and fill_y.y or scale_y[1].y
local pad = {
- fill_y.y + scale_y[1].y,
- (scale_x[1].x + scale_w) + (fill_x.x + fill_x.w),
- (scale_y[1].y + scale_h) + (fill_y.y + fill_y.h),
- fill_x.x + scale_x[1].x,
}
-- Dear Positive,
-- ??????????????????????????
-- Sincerely, me.
local patch = {
imageData = asset,
image = image,
batch = love.graphics.newSpriteBatch(image, (#scale_x * 2 + 1) * (#scale_y * 2 + 1)),
pad = pad,
scale_x = scale_x,
scale_y = scale_y,
}
return process(patch)
end
function patchy.import (image, metadata)
if type(metadata) == "string" then
metadata = love.filesystem.load(metadata)
if not metadata then error("Invalid metadata file passed to 'import'",2) end
metadata = metadata()
end
if type(metadata) == "function" then
metadata = metadata()
end
if type(metadata) ~= "table" then
error("bad argument #2 to 'import' (table expected, got "..type(metadata)..")", 2)
end
-- *.9.png
local imageData
local lovetype = isLoveType(image)
if type(image) == "string" or lovetype == "FileData" then
image = love.image.newImageData(image)
lovetype = isLoveType(image)
end
if lovetype == "ImageData" then
imageData = image
image = love.graphics.newImage(imageData)
lovetype = isLoveType(image)
end
if lovetype ~= "Image" then
error("bad argument #1 to 'import' (Image expected, got "..(lovetype or type(image))..")", 2)
end
metadata.imageData = imageData
metadata.image = image
metadata.batch = love.graphics.newSpriteBatch(image, #metadata.areas)
return postprocess(metadata)
end
return patchy
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