51 lines
1.2 KiB
Lua
51 lines
1.2 KiB
Lua
dofile("init.lua")
|
|
|
|
-- encode a bitmap
|
|
local _ = { 0, 0, 0 }
|
|
local R = { 255, 127, 127 }
|
|
local pixels = {
|
|
{ _, _, _, _, _, _, _ },
|
|
{ _, _, _, R, _, _, _ },
|
|
{ _, _, R, R, R, _, _ },
|
|
{ _, R, R, R, R, R, _ },
|
|
{ _, R, R, R, R, R, _ },
|
|
{ _, _, R, _, R, _, _ },
|
|
{ _, _, _, _, _, _, _ },
|
|
}
|
|
tga_encoder.image(pixels):save("bitmap_small.tga")
|
|
|
|
-- change a single pixel, then rescale the bitmap
|
|
local pixels_orig = pixels
|
|
pixels_orig[4][4] = { 255, 255, 255 }
|
|
local pixels = {}
|
|
for x = 1,56,1 do
|
|
local x_orig = math.ceil(x/8)
|
|
for z = 1,56,1 do
|
|
local z_orig = math.ceil(z/8)
|
|
local color = pixels_orig[z_orig][x_orig]
|
|
pixels[z] = pixels[z] or {}
|
|
pixels[z][x] = color
|
|
end
|
|
end
|
|
tga_encoder.image(pixels):save("bitmap_large.tga")
|
|
|
|
local pixels = {}
|
|
for x = 1,16,1 do -- left to right
|
|
for z = 1,16,1 do -- bottom to top
|
|
local r = math.min(x * 32 - 1, 255)
|
|
local g = math.min(z * 32 - 1, 255)
|
|
local b = 0
|
|
-- blue rectangle in top right corner
|
|
if x > 8 and z > 8 then
|
|
r = 0
|
|
g = 0
|
|
b = math.min(z * 16 - 1, 255)
|
|
end
|
|
local color = { r, g, b }
|
|
pixels[z] = pixels[z] or {}
|
|
pixels[z][x] = color
|
|
end
|
|
end
|
|
tga_encoder.image(pixels, {pixel_depth=16}):save("gradients_16bpp.tga")
|
|
tga_encoder.image(pixels, {pixel_depth=24}):save("gradients_24bpp.tga")
|