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95d7348a08
This improves texture pack compatibility. Masks are expected to be of the same size as the base texture. This change upscales the smaller texture if needed. The behaviour is now the same as a.png^b.png and a.png^[overlay:b.png (to mention a few).
370 lines
11 KiB
Lua
370 lines
11 KiB
Lua
-- Node texture tests
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local S = minetest.get_translator("testnodes")
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minetest.register_node("testnodes:6sides", {
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description = S("Six Textures Test Node").."\n"..
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S("Has 1 texture per face"),
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tiles = {
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"testnodes_normal1.png",
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"testnodes_normal2.png",
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"testnodes_normal3.png",
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"testnodes_normal4.png",
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"testnodes_normal5.png",
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"testnodes_normal6.png",
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},
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:anim", {
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description = S("Animated Test Node").."\n"..
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S("Tiles animate from A to D in 4s cycle"),
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tiles = {
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{ name = "testnodes_anim.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 4.0,
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}, },
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},
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:fill_positioning", {
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description = S("Fill Modifier Test Node") .. "\n" ..
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S("The node should have the same look as " ..
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"testnodes:fill_positioning_reference."),
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drawtype = "glasslike",
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paramtype = "light",
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tiles = {"[fill:16x16:#ffffff^[fill:6x6:1,1:#00ffdc" ..
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"^[fill:6x6:1,9:#00ffdc^[fill:6x6:9,1:#00ffdc^[fill:6x6:9,9:#00ffdc"},
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groups = {dig_immediate = 3},
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})
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minetest.register_node("testnodes:fill_positioning_reference", {
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description = S("Fill Modifier Test Node Reference"),
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drawtype = "glasslike",
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paramtype = "light",
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tiles = {"testnodes_fill_positioning_reference.png"},
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groups = {dig_immediate = 3},
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})
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minetest.register_node("testnodes:modifier_mask", {
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description = S("[mask Modifier Test Node"),
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tiles = {"testnodes_128x128_rgb.png^[mask:testnodes_mask_WRGBKW.png"},
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groups = {dig_immediate = 3},
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})
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-- Node texture transparency test
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local alphas = { 64, 128, 191 }
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for a=1,#alphas do
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local alpha = alphas[a]
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-- Transparency taken from texture
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minetest.register_node("testnodes:alpha_texture_"..alpha, {
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description = S("Texture Alpha Test Node (@1)", alpha).."\n"..
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S("Semi-transparent"),
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drawtype = "glasslike",
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paramtype = "light",
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tiles = {
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"testnodes_alpha"..alpha..".png",
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},
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use_texture_alpha = "blend",
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groups = { dig_immediate = 3 },
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})
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-- Transparency set via texture modifier
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minetest.register_node("testnodes:alpha_"..alpha, {
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description = S("Alpha Test Node (@1)", alpha).."\n"..
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S("Semi-transparent"),
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drawtype = "glasslike",
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paramtype = "light",
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tiles = {
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"testnodes_alpha.png^[opacity:" .. alpha,
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},
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use_texture_alpha = "blend",
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groups = { dig_immediate = 3 },
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})
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end
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minetest.register_node("testnodes:alpha_compositing", {
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description = S("Texture Overlay Test Node") .. "\n" ..
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S("A regular grid should be visible where each cell contains two " ..
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"texels with the same color.") .. "\n" ..
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S("Texture overlay is gamma-incorrect, " ..
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"and in general it does not do alpha compositing, " ..
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"both for backwards compatibility."),
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drawtype = "glasslike",
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paramtype = "light",
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tiles = {"testnodes_alpha_compositing_bottom.png^" ..
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"testnodes_alpha_compositing_top.png"},
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use_texture_alpha = "blend",
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groups = {dig_immediate = 3},
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})
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-- Generate PNG textures
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local function mandelbrot(w, h, iterations)
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local r = {}
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for y=0, h-1 do
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for x=0, w-1 do
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local re = (x - w/2) * 4/w
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local im = (y - h/2) * 4/h
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-- zoom in on a nice view
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re = re / 128 - 0.23
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im = im / 128 - 0.82
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local px, py = 0, 0
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local i = 0
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while px*px + py*py <= 4 and i < iterations do
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px, py = px*px - py*py + re, 2 * px * py + im
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i = i + 1
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end
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r[w*y+x+1] = i / iterations
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end
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end
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return r
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end
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local function gen_checkers(w, h, tile)
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local r = {}
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for y=0, h-1 do
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for x=0, w-1 do
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local hori = math.floor(x / tile) % 2 == 0
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local vert = math.floor(y / tile) % 2 == 0
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r[w*y+x+1] = hori ~= vert and 1 or 0
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end
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end
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return r
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end
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-- The engine should perform color reduction of the generated PNG in certain
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-- cases, so we have this helper to check the result
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local function encode_and_check(w, h, ctype, data)
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local ret = core.encode_png(w, h, data)
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assert(ret:sub(1, 8) == "\137PNG\r\n\026\n", "missing png signature")
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assert(ret:sub(9, 16) == "\000\000\000\rIHDR", "didn't find ihdr chunk")
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local ctype_actual = ret:byte(26) -- Color Type (1 byte)
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ctype = ({rgba=6, rgb=2, gray=0})[ctype]
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assert(ctype_actual == ctype, "png should have color type " .. ctype ..
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" but actually has " .. ctype_actual)
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return ret
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end
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local fractal = mandelbrot(512, 512, 128)
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local frac_emb = mandelbrot(64, 64, 64)
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local checker = gen_checkers(512, 512, 32)
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local floor = math.floor
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local abs = math.abs
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local data_emb = {}
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local data_mb = {}
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local data_ck = {}
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for i=1, #frac_emb do
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data_emb[i] = {
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r = floor(abs(frac_emb[i] * 2 - 1) * 255),
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g = floor(abs(1 - frac_emb[i]) * 255),
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b = floor(frac_emb[i] * 255),
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a = frac_emb[i] < 0.95 and 255 or 0,
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}
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end
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for i=1, #fractal do
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data_mb[i] = {
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r = floor(fractal[i] * 255),
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g = floor(abs(fractal[i] * 2 - 1) * 255),
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b = floor(abs(1 - fractal[i]) * 255),
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a = 255,
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}
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data_ck[i] = checker[i] > 0 and "#888" or "#000"
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end
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fractal = nil
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frac_emb = nil
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checker = nil
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local textures_path = core.get_worldpath() .. "/"
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core.safe_file_write(
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textures_path .. "testnodes1.png",
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encode_and_check(512, 512, "rgb", data_mb)
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)
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local png_ck = encode_and_check(512, 512, "gray", data_ck)
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core.dynamic_add_media({
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filename = "testnodes_generated_mb.png",
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filepath = textures_path .. "testnodes1.png"
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})
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core.dynamic_add_media({
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filename = "testnodes_generated_ck.png",
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filedata = png_ck,
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})
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minetest.register_node("testnodes:generated_png_mb", {
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description = S("Generated Mandelbrot PNG Test Node"),
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tiles = { "testnodes_generated_mb.png" },
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:generated_png_ck", {
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description = S("Generated Checker PNG Test Node"),
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tiles = { "testnodes_generated_ck.png" },
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groups = { dig_immediate = 2 },
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})
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local png_emb = "[png:" .. minetest.encode_base64(
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encode_and_check(64, 64, "rgba", data_emb))
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minetest.register_node("testnodes:generated_png_emb", {
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description = S("Generated In-Band Mandelbrot PNG Test Node"),
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tiles = { png_emb },
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drawtype = "allfaces", -- required because of transparent pixels
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use_texture_alpha = "clip",
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paramtype = "light",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:generated_png_src_emb", {
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description = S("Generated In-Band Source Blit Mandelbrot PNG Test Node"),
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tiles = { png_emb .. "^testnodes_damage_neg.png" },
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drawtype = "allfaces", -- required because of transparent pixels
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use_texture_alpha = "clip",
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paramtype = "light",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:generated_png_dst_emb", {
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description = S("Generated In-Band Dest Blit Mandelbrot PNG Test Node"),
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tiles = { "testnodes_generated_ck.png^" .. png_emb },
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groups = { dig_immediate = 2 },
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})
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png_ck = nil
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png_emb = nil
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data_emb = nil
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data_mb = nil
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data_ck = nil
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--[[
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The following nodes can be used to demonstrate the TGA format support.
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Minetest supports TGA types 1, 2, 3 & 10. While adding the support for
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TGA type 9 (RLE-compressed, color-mapped) is easy, it is not advisable
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to do so, as it is not backwards compatible with any Minetest pre-5.5;
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content creators should therefore either use TGA type 1 or 10, or PNG.
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TODO: Types 1, 2 & 10 should have two test nodes each (i.e. bottom-top
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and top-bottom) for 16bpp (A1R5G5B5), 24bpp (B8G8R8), 32bpp (B8G8R8A8)
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colors.
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Note: Minetest requires the optional TGA footer for a texture to load.
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If a TGA image does not load in Minetest, append eight (8) null bytes,
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then the string “TRUEVISION-XFILE.”, then another null byte.
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]]--
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minetest.register_node("testnodes:tga_type1_24bpp_bt", {
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description = S("TGA Type 1 (color-mapped RGB) 24bpp bottom-top Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type1_24bpp_bt.tga" },
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type1_24bpp_tb", {
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description = S("TGA Type 1 (color-mapped RGB) 24bpp top-bottom Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type1_24bpp_tb.tga" },
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type2_16bpp_bt", {
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description = S("TGA Type 2 (uncompressed RGB) 16bpp bottom-top Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type2_16bpp_bt.tga" },
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use_texture_alpha = "clip",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type2_16bpp_tb", {
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description = S("TGA Type 2 (uncompressed RGB) 16bpp top-bottom Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type2_16bpp_tb.tga" },
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use_texture_alpha = "clip",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type2_32bpp_bt", {
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description = S("TGA Type 2 (uncompressed RGB) 32bpp bottom-top Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type2_32bpp_bt.tga" },
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type2_32bpp_tb", {
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description = S("TGA Type 2 (uncompressed RGB) 32bpp top-bottom Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type2_32bpp_tb.tga" },
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type3_16bpp_bt", {
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description = S("TGA Type 3 (uncompressed grayscale) 16bpp bottom-top Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type3_16bpp_bt.tga" },
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type3_16bpp_tb", {
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description = S("TGA Type 3 (uncompressed grayscale) 16bpp top-bottom Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type3_16bpp_tb.tga" },
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type10_32bpp_bt", {
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description = S("TGA Type 10 (RLE-compressed RGB) 32bpp bottom-top Test Node"),
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tiles = { "testnodes_tga_type10_32bpp_bt.tga" },
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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minetest.register_node("testnodes:tga_type10_32bpp_tb", {
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description = S("TGA Type 10 (RLE-compressed RGB) 32bpp top-bottom Test Node"),
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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tiles = { "testnodes_tga_type10_32bpp_tb.tga" },
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use_texture_alpha = "blend",
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groups = { dig_immediate = 2 },
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})
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