tga_encoder/tools/generate_test_textures.lua

#!/usr/bin/env lua5.1
dofile("../init.lua")

local _ = { 0 }
local R = { 1 }
local G = { 2 }
local B = { 3 }

local pixels_colormapped_bt = {
	{ _, _, _, _, _, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, G, _, G, B, B, B, },
	{ _, R, G, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ R, R, R, _, _, _, _, _, },
}

local pixels_colormapped_tb = {
	{ R, R, R, _, _, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, G, _, _, _, _, _, },
	{ _, _, G, _, G, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, _, _, _, B, _, B, },
}

local pixels_colormapped_by_scanline_order = {
	["bottom-top"] = pixels_colormapped_bt,
	["top-bottom"] = pixels_colormapped_tb,
}

local _ = { 0 }
local R = { 127 }
local G = { 255 }
local B = { 191 }

local pixels_grayscale_bt = {
	{ _, _, _, _, _, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, G, _, G, B, B, B, },
	{ _, R, G, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ R, R, R, _, _, _, _, _, },
}

local pixels_grayscale_tb = {
	{ R, R, R, _, _, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, G, _, _, _, _, _, },
	{ _, _, G, _, G, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, _, _, _, B, _, B, },
}

local pixels_grayscale_by_scanline_order = {
	["bottom-top"] = pixels_grayscale_bt,
	["top-bottom"] = pixels_grayscale_tb,
}

local colormap_32bpp = {
	{    0,   0,   0, 128 },
	{ 255,    0,   0, 255 },
	{    0, 255,   0, 255 },
	{    0,   0, 255, 255 },
}

local colormap_24bpp = {
	{    0,   0,   0 },
	{ 255,    0,   0 },
	{    0, 255,   0 },
	{    0,   0, 255 },
}

local colormap_16bpp = {
	{    0,   0,   0,   0 },
	{ 255,    0,   0, 255 },
	{    0, 255,   0, 255 },
	{    0,   0, 255, 255 },
}

local colormap_by_color_format = {
	["A1R5G5B5"] = colormap_16bpp,
	["B8G8R8"]   = colormap_24bpp,
	["B8G8R8A8"] = colormap_32bpp,
}

for _, color_format in ipairs(
	tga_encoder.features.color_format
) do
	for _, scanline_order in ipairs(
		tga_encoder.features.scanline_order
	) do
		local filename
		local pixels
		if ("Y8" == color_format) then
			filename = "type3" ..
				'_' .. color_format ..
				'_' .. scanline_order ..
				'.tga'
			pixels = pixels_grayscale_by_scanline_order[
				scanline_order
			]
		else
			filename = "type1" ..
				'_' .. color_format ..
				'_' .. scanline_order ..
				'.tga'
			pixels = pixels_colormapped_by_scanline_order[
				scanline_order
			]
		end
		local colormap = colormap_by_color_format[
			color_format
		]
		local properties = {
			colormap = colormap,
			color_format = color_format,
			scanline_order = scanline_order,
		}
		print(filename)
		local image = tga_encoder.image(pixels)
		image:save(filename, properties)
	end
end

local _ = {    0,   0,   0, 128 }
local R = { 255,    0,   0, 255 }
local G = {    0, 255,   0, 255 }
local B = {    0,   0, 255, 255 }

local pixels_rgba_bt = {
	{ _, _, _, _, _, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, G, _, G, B, B, B, },
	{ _, R, G, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ R, R, R, _, _, _, _, _, },
}

local pixels_rgba_tb = {
	{ R, R, R, _, _, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, G, _, _, _, _, _, },
	{ _, _, G, _, G, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, _, _, _, B, _, B, },
}

image_rgba_bt = tga_encoder.image(pixels_rgba_bt)
image_rgba_tb = tga_encoder.image(pixels_rgba_tb)

image_rgba_bt:save(
	"type2_32bpp_bt.tga",
	{ color_format="B8G8R8A8", compression="RAW", scanline_order = "bottom-top" }
)
image_rgba_tb:save(
	"type2_32bpp_tb.tga",
	{ color_format="B8G8R8A8", compression="RAW", scanline_order = "top-bottom" }
)
image_rgba_bt:save(
	"type10_32bpp_bt.tga",
	{ color_format="B8G8R8A8", compression="RLE", scanline_order = "bottom-top" }
)
image_rgba_tb:save(
	"type10_32bpp_tb.tga",
	{ color_format="B8G8R8A8", compression="RLE", scanline_order = "top-bottom" }
)

local _ = {    0,   0,   0 }
local R = { 255,    0,   0 }
local G = {    0, 255,   0 }
local B = {    0,   0, 255 }

local pixels_rgb_bt = {
	{ _, _, _, _, _, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, G, _, G, B, B, B, },
	{ _, R, G, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ R, R, R, _, _, _, _, _, },
}

local pixels_rgb_tb = {
	{ R, R, R, _, _, _, _, _, },
	{ _, R, _, _, _, _, _, _, },
	{ _, R, G, G, G, _, _, _, },
	{ _, R, G, _, _, _, _, _, },
	{ _, _, G, _, G, B, B, B, },
	{ _, _, G, G, G, B, _, B, },
	{ _, _, _, _, _, B, B, B, },
	{ _, _, _, _, _, B, _, B, },
}

image_rgb_bt = tga_encoder.image(pixels_rgb_bt)
image_rgb_tb = tga_encoder.image(pixels_rgb_tb)

image_rgb_bt:save(
	"type2_24bpp_bt.tga",
	{ color_format="B8G8R8", compression="RAW", scanline_order = "bottom-top" }
)
image_rgb_tb:save(
	"type2_24bpp_tb.tga",
	{ color_format="B8G8R8", compression="RAW", scanline_order = "top-bottom" }
)
image_rgb_bt:save(
	"type10_24bpp_bt.tga",
	{ color_format="B8G8R8", compression="RLE", scanline_order = "bottom-top" }
)
image_rgb_tb:save(
	"type10_24bpp_tb.tga",
	{ color_format="B8G8R8", compression="RLE", scanline_order = "top-bottom" }
)
image_rgb_bt:save(
	"type2_16bpp_bt.tga",
	{ color_format="A1R5G5B5", compression="RAW", scanline_order = "bottom-top" }
)
image_rgb_tb:save(
	"type2_16bpp_tb.tga",
	{ color_format="A1R5G5B5", compression="RAW", scanline_order = "top-bottom" }
)
image_rgb_bt:save(
	"type10_16bpp_bt.tga",
	{ color_format="A1R5G5B5", compression="RLE", scanline_order = "bottom-top" }
)
image_rgb_tb:save(
	"type10_16bpp_tb.tga",
	{ color_format="A1R5G5B5", compression="RLE", scanline_order = "top-bottom" }
)