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Gray Scales

 
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KawaGeo



Joined: 27 Aug 2005
Posts: 191
Location: Calif Mountains
PostPosted: Tue Sep 06, 2005 3:46 am    Post subject: Gray Scales Reply with quote
Here is a code to display gray scales for reference.

Code:
-- grayscales.lua by Geo Massar, 2005

dofile "LPut01.lua"

green = Color.new(0, 255, 0)

bg = Image.createEmpty(480,272)    -- background
bg:caption(152,28, "Gray Scales", green, 2)
bg:print(2,262, "by Geo Massar, 2005 (aka KawaGeo)", green)

bg:fillRect(111,71, 258,130, green)
for i = 0, 3 do
  mark = 111 + 64*i
  bg:drawLine(mark,200, mark,207, green)
end
bg:drawLine(368,200, 368,207, green) -- last mark
bg:print(109,210, "0",   green)
bg:print(169,210, "64",  green)
bg:print(229,210, "128", green)
bg:print(293,210, "192", green)
bg:print(358,210, "255", green)

for x = 0, 255 do
  gray = Color.new(x,x,x)
  bg:drawLine(112+x,72, 112+x,199, gray)
end
bg:save "grayscales.tga"

screen:blit(0,0, bg)
screen.flip()

while true do
  screen.waitVblankStart()
end

You can get the library file, LPut01.lua, at my webpage.

Screenshot:


NOTE: With the current version of LP, the display shows only 32 scales. There will be full 256 scales in the future version. Right, Shine?
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Jim



Joined: 02 Jul 2005
Posts: 487
Location: Sydney
PostPosted: Tue Sep 06, 2005 5:51 pm    Post subject: Reply with quote
Quote:
NOTE: With the current version of LP, the display shows only 32 scales. There will be full 256 scales in the future version. Right, Shine?

The PSP can only show 32 grey levels in 16bit colour mode. Is LUA 16 or 32bit?

Jim
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Tue Sep 06, 2005 11:42 pm    Post subject: Reply with quote
Jim wrote:
Is LUA 16 or 32bit?


16 bit: http://forums.ps2dev.org/viewtopic.php?t=3157
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