mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2025-12-20 17:26:01 +08:00
245 lines
7.5 KiB
Lua
245 lines
7.5 KiB
Lua
-------------------------------------------------------------------------------
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-- Spine Runtimes Software License v2.5
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--
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-- Copyright (c) 2013-2016, Esoteric Software
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-- All rights reserved.
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--
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-- You are granted a perpetual, non-exclusive, non-sublicensable, and
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-- non-transferable license to use, install, execute, and perform the Spine
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-- Runtimes software and derivative works solely for personal or internal
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-- use. Without the written permission of Esoteric Software (see Section 2 of
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-- the Spine Software License Agreement), you may not (a) modify, translate,
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-- adapt, or develop new applications using the Spine Runtimes or otherwise
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-- create derivative works or improvements of the Spine Runtimes or (b) remove,
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-- delete, alter, or obscure any trademarks or any copyright, trademark, patent,
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-- or other intellectual property or proprietary rights notices on or in the
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-- Software, including any copy thereof. Redistributions in binary or source
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-- form must include this license and terms.
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--
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-- THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
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-- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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-- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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-- EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
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-- USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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-- IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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-- POSSIBILITY OF SUCH DAMAGE.
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-------------------------------------------------------------------------------
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local setmetatable = setmetatable
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local table_insert = table.insert
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local math_abs = math.abs
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local TextureAtlasRegion = require "spine-lua.TextureAtlasRegion"
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local TextureWrap = require "spine-lua.TextureWrap"
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local TextureFilter = require "spine-lua.TextureFilter"
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local TextureAtlasPage = {}
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TextureAtlasPage.__index = TextureAtlasPage
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function TextureAtlasPage.new ()
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local self = {
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name = nil,
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minFilter = nil,
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magFilter = nil,
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uWrap = nil,
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vWrap = nil,
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texture = nil,
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width = 0,
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height = 0
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}
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setmetatable(self, TextureAtlasPage)
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return self
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end
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local TextureAtlas = {}
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TextureAtlas.__index = TextureAtlas
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function TextureAtlas.new (atlasContent, imageLoader)
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local self = {
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pages = {},
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regions = {}
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}
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setmetatable(self, TextureAtlas)
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self:parse(atlasContent, imageLoader)
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return self
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end
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function TextureAtlas:parse (atlasContent, imageLoader)
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if not atlasContent then error("atlasContent cannot be nil.", 2) end
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if not imageLoader then error("imageLoader cannot be nil.", 2) end
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local lines = {}
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local index = 0
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local numLines = 0
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for line in atlasContent:gmatch("[^\r\n]+") do
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lines[numLines] = line
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numLines = numLines + 1
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end
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local readLine = function ()
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if index >= numLines then return nil end
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local line = lines[index]
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index = index + 1
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return line
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end
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local readValue = function ()
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local line = readLine()
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local idx = line:find(":")
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if not idx then error("Invalid line: " .. line, 2) end
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return line:sub(idx + 1):match'^%s*(.*%S)' or ''
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end
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local readTuple = function ()
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local line = readLine()
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local idx = line:find(":")
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if not idx then error("Invalid line: " .. line, 2) end
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local i = 1
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local lastMatch = idx + 1
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local tuple = {}
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while i <= 3 do
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local comma = line:find(",", lastMatch)
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if not comma then break end
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tuple[i] = line:sub(lastMatch, comma - 1):match'^%s*(.*%S)' or ''
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lastMatch = comma + 1
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i = i + 1
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end
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tuple[i] = line:sub(lastMatch):match'^%s*(.*%S)' or ''
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return tuple
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end
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local parseInt = function (str)
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return tonumber(str)
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end
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local filterFromString = function (str)
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str = str:lower()
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if str == "nearest" then return TextureFilter.Nearest
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elseif str == "linear" then return TextureFilter.Linear
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elseif str == "mipmap" then return TextureFilter.MipMap
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elseif str == "mipmapnearestnearest" then return TextureFilter.MipMapNearestNearest
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elseif str == "mipmaplinearnearest" then return TextureFilter.MipMapLinearNearest
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elseif str == "mipmapnearestlinear" then return TextureFilter.MipMapNearestLinear
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elseif str == "mipmaplinearlinear" then return TextureFilter.MipMapLinearLinear
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else error("Unknown texture wrap: " .. str, 2)
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end
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end
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local page = nil
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while true do
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local line = readLine()
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if not line then break end
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line = line:match'^%s*(.*%S)' or ''
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if line:len() == 0 then
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page = nil
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elseif not page then
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page = TextureAtlasPage.new()
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page.name = line
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local tuple = readTuple()
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if #tuple == 2 then
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page.width = parseInt(tuple[1])
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page.height = parseInt(tuple[2])
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tuple = readTuple()
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else
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-- We only support atlases that have the page width/height
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-- encoded in them. That way we don't rely on any special
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-- wrapper objects for images to get the page size from
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error("Atlas must specify page width/height. Please export to the latest atlas format", 2)
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end
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tuple = readTuple()
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page.minFilter = filterFromString(tuple[1])
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page.magFilter = filterFromString(tuple[2])
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local direction = readValue()
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page.uWrap = TextureWrap.ClampToEdge
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page.vWrap = TextureWrap.ClampToEdge
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if direction == "x" then
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page.uWrap = TextureWrap.Repeat
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elseif direction == "y" then
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page.vWrap = TextureWrap.Repeat
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elseif direction == "xy" then
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page.uWrap = TextureWrap.Repeat
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page.vWrap = TextureWrap.Repeat
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end
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page.texture = imageLoader(line)
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-- FIXME page.texture:setFilters(page.minFilter, page.magFilter)
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-- FIXME page.texture:setWraps(page.uWrap, page.vWrap)
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table_insert(self.pages, page)
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else
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local region = TextureAtlasRegion.new()
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region.name = line
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region.page = page
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if readValue() == "true" then region.rotate = true end
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local tuple = readTuple()
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local x = parseInt(tuple[1])
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local y = parseInt(tuple[2])
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tuple = readTuple()
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local width = parseInt(tuple[1])
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local height = parseInt(tuple[2])
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region.u = x / page.width
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region.v = y / page.height
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if region.rotate then
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region.u2 = (x + height) / page.width
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region.v2 = (y + width) / page.height
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else
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region.u2 = (x + width) / page.width
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region.v2 = (y + height) / page.height
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end
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region.x = x
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region.y = y
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region.width = math_abs(width)
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region.height = math_abs(height)
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-- Read and skip optional splits
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tuple = readTuple()
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if #tuple == 4 then
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tuple = readTuple()
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if #tuple == 4 then
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readTuple()
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end
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end
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region.originalWidth = parseInt(tuple[1])
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region.originalHeight = parseInt(tuple[2])
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tuple = readTuple()
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region.offsetX = parseInt(tuple[1])
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region.offsetY = parseInt(tuple[2])
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region.index = parseInt(readValue())
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region.texture = page.texture
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table_insert(self.regions, region)
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end
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end
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end
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function TextureAtlas:findRegion(name)
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for i, region in ipairs(self.regions) do
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if region.name == name then return region end
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end
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return nil
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end
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function TextureAtlas:dispose()
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for i, page in ipairs(self.pairs) do
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-- FIXME implement disposing of pages
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-- love2d doesn't support manual disposing
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end
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end
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return TextureAtlas
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