1 files changed, 290 insertions, 0 deletions
diff --git a/games/devtest/mods/testnodes/textures.lua b/games/devtest/mods/testnodes/textures.lua
new file mode 100644
index 000000000..2faacdd78
--- /dev/null
+++ b/games/devtest/mods/testnodes/textures.lua
@@ -0,0 +1,290 @@
+-- Node texture tests
+
+local S = minetest.get_translator("testnodes")
+
+minetest.register_node("testnodes:6sides", {
+	description = S("Six Textures Test Node"),
+	tiles = {
+		"testnodes_normal1.png",
+		"testnodes_normal2.png",
+		"testnodes_normal3.png",
+		"testnodes_normal4.png",
+		"testnodes_normal5.png",
+		"testnodes_normal6.png",
+	},
+
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:anim", {
+	description = S("Animated Test Node"),
+	tiles = {
+		{ name = "testnodes_anim.png",
+		animation = {
+			type = "vertical_frames",
+			aspect_w = 16,
+			aspect_h = 16,
+			length = 4.0,
+		}, },
+	},
+
+	groups = { dig_immediate = 2 },
+})
+
+-- Node texture transparency test
+
+local alphas = { 64, 128, 191 }
+
+for a=1,#alphas do
+	local alpha = alphas[a]
+
+	-- Transparency taken from texture
+	minetest.register_node("testnodes:alpha_texture_"..alpha, {
+		description = S("Texture Alpha Test Node (@1)", alpha),
+		drawtype = "glasslike",
+		paramtype = "light",
+		tiles = {
+			"testnodes_alpha"..alpha..".png",
+		},
+		use_texture_alpha = "blend",
+
+		groups = { dig_immediate = 3 },
+	})
+
+	-- Transparency set via texture modifier
+	minetest.register_node("testnodes:alpha_"..alpha, {
+		description = S("Alpha Test Node (@1)", alpha),
+		drawtype = "glasslike",
+		paramtype = "light",
+		tiles = {
+			"testnodes_alpha.png^[opacity:" .. alpha,
+		},
+		use_texture_alpha = "blend",
+
+		groups = { dig_immediate = 3 },
+	})
+end
+
+-- Generate PNG textures
+
+local function mandelbrot(w, h, iterations)
+	local r = {}
+	for y=0, h-1 do
+		for x=0, w-1 do
+			local re = (x - w/2) * 4/w
+			local im = (y - h/2) * 4/h
+			-- zoom in on a nice view
+			re = re / 128 - 0.23
+			im = im / 128 - 0.82
+
+			local px, py = 0, 0
+			local i = 0
+			while px*px + py*py <= 4 and i < iterations do
+				px, py = px*px - py*py + re, 2 * px * py + im
+				i = i + 1
+			end
+			r[w*y+x+1] = i / iterations
+		end
+	end
+	return r
+end
+
+local function gen_checkers(w, h, tile)
+	local r = {}
+	for y=0, h-1 do
+		for x=0, w-1 do
+			local hori = math.floor(x / tile) % 2 == 0
+			local vert = math.floor(y / tile) % 2 == 0
+			r[w*y+x+1] = hori ~= vert and 1 or 0
+		end
+	end
+	return r
+end
+
+local fractal = mandelbrot(512, 512, 128)
+local frac_emb = mandelbrot(64, 64, 64)
+local checker = gen_checkers(512, 512, 32)
+
+local floor = math.floor
+local abs = math.abs
+local data_emb = {}
+local data_mb = {}
+local data_ck = {}
+for i=1, #frac_emb do
+	data_emb[i] = {
+		r = floor(abs(frac_emb[i] * 2 - 1) * 255),
+		g = floor(abs(1 - frac_emb[i]) * 255),
+		b = floor(frac_emb[i] * 255),
+		a = frac_emb[i] < 0.95 and 255 or 0,
+	}
+end
+for i=1, #fractal do
+	data_mb[i] = {
+		r = floor(fractal[i] * 255),
+		g = floor(abs(fractal[i] * 2 - 1) * 255),
+		b = floor(abs(1 - fractal[i]) * 255),
+		a = 255,
+	}
+	data_ck[i] = checker[i] > 0 and "#F80" or "#000"
+end
+
+local textures_path = minetest.get_modpath( minetest.get_current_modname() ) .. "/textures/"
+minetest.safe_file_write(
+	textures_path .. "testnodes_generated_mb.png",
+	minetest.encode_png(512,512,data_mb)
+)
+minetest.safe_file_write(
+	textures_path .. "testnodes_generated_ck.png",
+	minetest.encode_png(512,512,data_ck)
+)
+
+minetest.register_node("testnodes:generated_png_mb", {
+	description = S("Generated Mandelbrot PNG Test Node"),
+	tiles = { "testnodes_generated_mb.png" },
+
+	groups = { dig_immediate = 2 },
+})
+minetest.register_node("testnodes:generated_png_ck", {
+	description = S("Generated Checker PNG Test Node"),
+	tiles = { "testnodes_generated_ck.png" },
+
+	groups = { dig_immediate = 2 },
+})
+
+local png_emb = "[png:" .. minetest.encode_base64(minetest.encode_png(64,64,data_emb))
+
+minetest.register_node("testnodes:generated_png_emb", {
+	description = S("Generated In-Band Mandelbrot PNG Test Node"),
+	tiles = { png_emb },
+
+	groups = { dig_immediate = 2 },
+})
+minetest.register_node("testnodes:generated_png_src_emb", {
+	description = S("Generated In-Band Source Blit Mandelbrot PNG Test Node"),
+	tiles = { png_emb .. "^testnodes_damage_neg.png" },
+
+	groups = { dig_immediate = 2 },
+})
+minetest.register_node("testnodes:generated_png_dst_emb", {
+	description = S("Generated In-Band Dest Blit Mandelbrot PNG Test Node"),
+	tiles = { "testnodes_generated_ck.png^" .. png_emb },
+
+	groups = { dig_immediate = 2 },
+})
+
+--[[
+
+The following nodes can be used to demonstrate the TGA format support.
+
+Minetest supports TGA types 1, 2, 3 & 10. While adding the support for
+TGA type 9 (RLE-compressed, color-mapped) is easy, it is not advisable
+to do so, as it is not backwards compatible with any Minetest pre-5.5;
+content creators should therefore either use TGA type 1 or 10, or PNG.
+
+TODO: Types 1, 2 & 10 should have two test nodes each (i.e. bottom-top
+and top-bottom) for 16bpp (A1R5G5B5), 24bpp (B8G8R8), 32bpp (B8G8R8A8)
+colors.
+
+Note: Minetest requires the optional TGA footer for a texture to load.
+If a TGA image does not load in Minetest, append eight (8) null bytes,
+then the string “TRUEVISION-XFILE.”, then another null byte.
+
+]]--
+
+minetest.register_node("testnodes:tga_type1_24bpp_bt", {
+	description = S("TGA Type 1 (color-mapped RGB) 24bpp bottom-top Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type1_24bpp_bt.tga" },
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type1_24bpp_tb", {
+	description = S("TGA Type 1 (color-mapped RGB) 24bpp top-bottom Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type1_24bpp_tb.tga" },
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type2_16bpp_bt", {
+	description = S("TGA Type 2 (uncompressed RGB) 16bpp bottom-top Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type2_16bpp_bt.tga" },
+	use_texture_alpha = "clip",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type2_16bpp_tb", {
+	description = S("TGA Type 2 (uncompressed RGB) 16bpp top-bottom Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type2_16bpp_tb.tga" },
+	use_texture_alpha = "clip",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type2_32bpp_bt", {
+	description = S("TGA Type 2 (uncompressed RGB) 32bpp bottom-top Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type2_32bpp_bt.tga" },
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type2_32bpp_tb", {
+	description = S("TGA Type 2 (uncompressed RGB) 32bpp top-bottom Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type2_32bpp_tb.tga" },
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type3_16bpp_bt", {
+	description = S("TGA Type 3 (uncompressed grayscale) 16bpp bottom-top Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type3_16bpp_bt.tga" },
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type3_16bpp_tb", {
+	description = S("TGA Type 3 (uncompressed grayscale) 16bpp top-bottom Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type3_16bpp_tb.tga" },
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type10_32bpp_bt", {
+	description = S("TGA Type 10 (RLE-compressed RGB) 32bpp bottom-top Test Node"),
+	tiles = { "testnodes_tga_type10_32bpp_bt.tga" },
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})
+
+minetest.register_node("testnodes:tga_type10_32bpp_tb", {
+	description = S("TGA Type 10 (RLE-compressed RGB) 32bpp top-bottom Test Node"),
+	drawtype = "glasslike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	tiles = { "testnodes_tga_type10_32bpp_tb.tga" },
+	use_texture_alpha = "blend",
+	groups = { dig_immediate = 2 },
+})