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https://github.com/koreader/koreader
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7a2bf21434
The dedicated image format library may often give better results than MuPDF (eg: for animated GIFs).
59 lines
1.6 KiB
Lua
59 lines
1.6 KiB
Lua
local Document = require("document/document")
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local DrawContext = require("ffi/drawcontext")
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local Screen = require("device").screen
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local pic = nil
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local PicDocument = Document:new{
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_document = false,
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is_pic = true,
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dc_null = DrawContext.new(),
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provider = "picdocument",
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provider_name = "Picture Document",
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}
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function PicDocument:init()
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self:updateColorRendering()
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if not pic then pic = require("ffi/pic") end
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-- pic.color needs to be true before opening document to allow toggling color
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pic.color = Screen.isColorScreen()
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local ok
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ok, self._document = pcall(pic.openDocument, self.file)
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if not ok then
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error("Failed to open jpeg image")
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end
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self.info.has_pages = true
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self.info.configurable = false
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self:_readMetadata()
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end
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function PicDocument:getUsedBBox(pageno)
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return { x0 = 0, y0 = 0, x1 = self._document.width, y1 = self._document.height }
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end
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function PicDocument:getProps()
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local _, _, docname = self.file:find(".*/(.*)")
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docname = docname or self.file
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return {
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title = docname:match("(.*)%."),
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}
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end
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function PicDocument:getCoverPageImage()
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local first_page = self._document:openPage(1)
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if first_page.image_bb then
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return first_page.image_bb
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end
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return nil
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end
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function PicDocument:register(registry)
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registry:addProvider("gif", "image/gif", self, 100)
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registry:addProvider("jpg", "image/jpeg", self, 100)
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registry:addProvider("jpeg", "image/jpeg", self, 100)
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registry:addProvider("png", "image/png", self, 100)
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end
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return PicDocument
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