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71 lines
2.0 KiB
Lua
71 lines
2.0 KiB
Lua
require "unireader"
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DJVUReader = UniReader:new{}
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function DJVUReader:init()
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self.nulldc = djvu.newDC()
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end
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-- open a DJVU file and its settings store
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function DJVUReader:open(filename)
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self.doc = djvu.openDocument(filename)
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if self.doc ~= nil then
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self.settings = DocSettings:open(filename)
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local gamma = self.settings:readsetting("gamma")
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if gamma then
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self.globalgamma = gamma
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end
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return true
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end
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return false
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end
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-- set viewer state according to zoom state
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function DJVUReader:setzoom(page)
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local dc = djvu.newDC()
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local pwidth, pheight = page:getSize(self.nulldc)
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if self.globalzoommode == self.ZOOM_FIT_TO_PAGE then
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self.globalzoom = width / pwidth
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self.offset_x = 0
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self.offset_y = (height - (self.globalzoom * pheight)) / 2
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if height / pheight < self.globalzoom then
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self.globalzoom = height / pheight
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print(width, (self.globalzoom * pwidth))
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self.offset_x = (width - (self.globalzoom * pwidth)) / 2
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self.offset_y = 0
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end
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elseif self.globalzoommode == self.ZOOM_FIT_TO_PAGE_WIDTH then
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self.globalzoom = width / pwidth
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self.offset_x = 0
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self.offset_y = (height - (self.globalzoom * pheight)) / 2
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elseif self.globalzoommode == self.ZOOM_FIT_TO_PAGE_HEIGHT then
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self.globalzoom = height / pheight
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self.offset_x = (width - (self.globalzoom * pwidth)) / 2
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self.offset_y = 0
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end
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dc:setZoom(self.globalzoom)
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-- record globalzoom for manual zoom in/out
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self.globalzoom_orig = self.globalzoom
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dc:setRotate(self.globalrotate);
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dc:setOffset(self.offset_x, self.offset_y)
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self.fullwidth, self.fullheight = page:getSize(dc)
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self.min_offset_x = fb.bb:getWidth() - self.fullwidth
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self.min_offset_y = fb.bb:getHeight() - self.fullheight
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if(self.min_offset_x > 0) then
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self.min_offset_x = 0
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end
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if(self.min_offset_y > 0) then
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self.min_offset_y = 0
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end
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-- set gamma here, we don't have any other good place for this right now:
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if self.globalgamma ~= self.GAMMA_NO_GAMMA then
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print("gamma correction: "..self.globalgamma)
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dc:setGamma(self.globalgamma)
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end
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return dc
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end
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