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handle invalid bounding boxes from mupdf, closes #25

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Dobrica Pavlinusic
2012-03-04 13:28:55 +01:00
parent b8cc9c9a36
commit 2c48d4a107
1 changed files with 10 additions and 5 deletions
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15
pdfreader.lua
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@@ -141,6 +141,15 @@ end
function PDFReader:setzoom(page)
local dc = pdf.newDC()
local pwidth, pheight = page:getSize(self.nulldc)
print("# page::getSize "..pwidth.."*"..pheight);
local x0, y0, x1, y1 = page:getUsedBBox()
if x0 == 0.01 and y0 == 0.01 and x1 == -0.01 and y1 == -0.01 then
x0 = 0
y0 = 0
x1 = pwidth
y2 = pheight
end
print("# page::getUsedBBox "..x0.."*"..y0.." "..x1.."*"..y1);
if self.globalzoommode == self.ZOOM_FIT_TO_PAGE
or self.globalzoommode == self.ZOOM_FIT_TO_CONTENT then
@@ -164,7 +173,6 @@ function PDFReader:setzoom(page)
self.offset_y = 0
end
if self.globalzoommode == self.ZOOM_FIT_TO_CONTENT then
local x0, y0, x1, y1 = page:getUsedBBox()
if (x1 - x0) < pwidth then
self.globalzoom = width / (x1 - x0)
self.offset_x = -1 * x0 * self.globalzoom
@@ -176,21 +184,18 @@ function PDFReader:setzoom(page)
end
end
elseif self.globalzoommode == self.ZOOM_FIT_TO_CONTENT_WIDTH then
local x0, y0, x1, y1 = page:getUsedBBox()
if (x1 - x0) < pwidth then
self.globalzoom = width / (x1 - x0)
self.offset_x = -1 * x0 * self.globalzoom
self.offset_y = -1 * y0 * self.globalzoom + (height - (self.globalzoom * (y1 - y0))) / 2
end
elseif self.globalzoommode == self.ZOOM_FIT_TO_CONTENT_HEIGHT then
local x0, y0, x1, y1 = page:getUsedBBox()
if (y1 - y0) < pheight then
self.globalzoom = height / (y1 - y0)
self.offset_x = -1 * x0 * self.globalzoom + (width - (self.globalzoom * (x1 - x0))) / 2
self.offset_y = -1 * y0 * self.globalzoom
end
elseif self.globalzoommode == self.ZOOM_FIT_TO_CONTENT_HALF_WIDTH then
local x0, y0, x1, y1 = page:getUsedBBox()
self.globalzoom = width / (x1 - x0 + self.pan_margin)
self.offset_x = -1 * x0 * self.globalzoom * 2 + self.pan_margin
self.globalzoom = height / (y1 - y0)
@@ -215,7 +220,7 @@ function PDFReader:setzoom(page)
self.min_offset_y = 0
end
print("globalzoom:"..self.globalzoom.." globalrotate:"..self.globalrotate.." offset:"..self.offset_x.."*"..self.offset_y.." pagesize:"..self.fullwidth.."*"..self.fullheight.." min_offset:"..self.min_offset_x.."*"..self.min_offset_y)
print("# PDFReader:setzoom globalzoom:"..self.globalzoom.." globalrotate:"..self.globalrotate.." offset:"..self.offset_x.."*"..self.offset_y.." pagesize:"..self.fullwidth.."*"..self.fullheight.." min_offset:"..self.min_offset_x.."*"..self.min_offset_y)
-- set gamma here, we don't have any other good place for this right now:
if self.globalgamma ~= self.GAMMA_NO_GAMMA then