Add test for mutiple textures

Author: cloudwu

test/mtex.game

@@ -0,0 +1,3 @@
+# a small texture size for testing
+texture_size : 64
+entry : mtex.lua

test/mtex.lua

@@ -0,0 +1,58 @@
+-- To run this sample :
+-- bin/soluna.exe test/mtex.game
+local soluna = require "soluna"
+local ltask = require "ltask"
+
+soluna.set_window_title "multiple texture"
+
+local bundle = {}
+
+local function color(r,g,b)
+	local name = string.format("%x%x%x", r,g,b)
+	bundle[#bundle+1] = {
+		name = r << 8 | g << 4 | b,
+		filename = "@" .. name,
+	}
+	return {
+		filename = "@" .. name,
+		content = string.pack("BBBB", r << 4, g << 4, b << 4, 255),
+		w = 1,
+		h = 1,
+	}
+end
+
+local function colors()
+	local results = {}
+	local n = 1
+	for r = 0, 15 do
+		for g = 0, 15 do
+			for b = 0, 15 do
+				results[n] = color(r,g,b)
+				n = n + 1
+			end
+		end
+	end
+	return results
+end
+
+soluna.preload(colors())
+
+local rects = soluna.load_sprites(bundle)
+
+local args = ...
+local batch = args.batch
+
+local callback = {}
+
+function callback.frame(count)
+	batch:layer(10, 100, 100)
+	for i = 0, 63 do
+		for j = 0,63 do
+			batch:add(rects[i * 64 + j], i, j)
+		end
+	end
+	batch:layer()
+end
+
+return callback
+