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Update master: fixes for BMP method

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This commit is contained in:
NuPogodi
2012-07-02 09:35:26 +03:00
committed by Qingping Hou
parent f996a69568
commit e580a7c278
1 changed files with 11 additions and 9 deletions
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20
screen.lua
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@@ -109,17 +109,17 @@ end
function Screen:screenshot()
lfs.mkdir("./screenshots")
local start = os.clock()
--showInfoMsgWithDelay("making screenshot... ", 2500, 1)
--local start = os.clock()
showInfoMsgWithDelay("making screenshot... ", 1000, 1)
self:BMP(lfs.currentdir().."/screenshots/"..os.date("%Y%m%d%H%M%S")..".bmp", "bzip2 ")
showInfoMsgWithDelay(string.format("BMP-shot ready in %.2f(s)", os.clock()-start), 1000, 1)
--showInfoMsgWithDelay(string.format("Screenshot is ready in %.2f(s) ", os.clock()-start), 1000, 1)
end
function Screen:BMP(fn, pack) -- ~1.6-1.8(s), @ Kindle3, 600x800, remains 4bpp
function Screen:BMP(fn, pack) -- ~0.1-0.2(s) @ Kindle3 (600x800) BMP remains 4bpp
local inputf = assert(io.open("/dev/fb0","rb"))
if inputf then
local outputf = assert(io.open(fn,"wb"))
-- writing header
-- writing the bmp-header
outputf:write("BM", string.char(246), string.char(169), string.char(3), string.rep(string.char(0),5),
string.char(118), string.rep(string.char(0),3), string.char(40), string.char(0),
string.rep(string.char(0),2), string.char(G_width%256), string.char((G_width-G_width%256)/256), -- width
@@ -134,13 +134,15 @@ function Screen:BMP(fn, pack) -- ~1.6-1.8(s), @ Kindle3, 600x800, remains 4bpp
outputf:write(string.rep(string.char(i*16+i),3), string.char(0))
i=i-1
end
-- now read fb0-content & invert the line order (i.e. make a vertical flip)
local content = ""
-- now read fb0-content & fill the table in the reversed line order (i.e. make a vertical flip)
local content = {}
for i=1, G_height do
content = inputf:read(block)..content
table.insert(content, 1, inputf:read(block))
end
-- write v-flipped bmp-data to the output file
outputf:write(content)
for i=1, G_height do
outputf:write(content[i])
end
inputf:close()
outputf:close()
if pack then os.execute(pack..fn) end