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changed gamma handling: now we multiply.

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This commit is contained in:
HW
2011-11-21 01:18:10 +01:00
parent a6541596ce
commit e54ce6a358
1 changed files with 8 additions and 11 deletions
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19
reader.lua
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@@ -29,7 +29,7 @@ ZOOM_FIT_TO_CONTENT = -4
ZOOM_FIT_TO_CONTENT_WIDTH = -5
ZOOM_FIT_TO_CONTENT_HEIGHT = -6
GAMMA_NO_GAMMA = -1.0
GAMMA_NO_GAMMA = 1.0
-- option parsing:
longopts = {
@@ -66,6 +66,8 @@ globalgamma = GAMMA_NO_GAMMA
fullwidth = 0
fullheight = 0
offset_x = 0
offset_y = 0
shiftmode = false
@@ -100,8 +102,6 @@ nulldc = pdf.newDC()
function setzoom(page, cacheslot)
local dc = pdf.newDC()
local pwidth, pheight = page:getSize(nulldc)
local offset_x = 0
local offset_y = 0
if globalzoommode == ZOOM_FIT_TO_PAGE then
globalzoom = width / pwidth
@@ -189,12 +189,9 @@ function goto(no)
end
end
function modify_gamma(offset)
if globalgamma == -1 then
globalgamma = 1
end
print("modify_gamma, gamma="..globalgamma.." offset="..offset)
globalgamma = globalgamma + offset;
function modify_gamma(factor)
print("modify_gamma, gamma="..globalgamma.." factor="..factor)
globalgamma = globalgamma * factor;
goto(pageno)
end
function setglobalzoommode(newzoommode)
@@ -233,9 +230,9 @@ function mainloop()
elseif ev.code == KEY_BACK then
return
elseif ev.code == KEY_FW_UP then
modify_gamma( 0.2 )
modify_gamma( 1.25 )
elseif ev.code == KEY_FW_DOWN then
modify_gamma( -0.2 )
modify_gamma( 0.8 )
elseif ev.code == KEY_A then
if shiftmode then
setglobalzoommode(ZOOM_FIT_TO_CONTENT)