adding new files

python/lowlevel_test_wasm/compress_test.py

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+# compress_test.py
+from .basisu_wasm import *
+
+# === Load WASM ===
+codec = BasisuWasm("basisu_py/wasm/basisu_module_st.wasm")
+codec.load()
+
+print("Version =", codec.version())
+
+# === Build test image ===
+W, H = 256, 256
+BYTES_PER_PIXEL = 4
+pitch = W * BYTES_PER_PIXEL
+
+img = bytearray(W * H * 4)
+
+for y in range(H):
+    for x in range(W):
+        i = (y * W + x) * 4
+        img[i + 0] = x & 0xFF          # R
+        img[i + 1] = y & 0xFF          # G
+        img[i + 2] = (x ^ y) & 0xFF    # B
+        img[i + 3] = 255               # A
+
+# === Upload image to WASM memory ===
+img_ptr = codec.alloc(len(img))
+codec.write_bytes(img_ptr, img)
+
+# === Create comp_params ===
+params = codec.new_params()
+
+# === Set image into comp_params ===
+ok = codec.set_image_rgba32(params, 0, img_ptr, W, H, pitch)
+print("Set image:", ok)
+
+# === Compress ===
+ok = codec.compress(
+    params,
+    tex_format=BasisTexFormat.cUASTC_LDR_4x4,
+    quality=100,
+    effort=BasisEffort.DEFAULT,
+    flags=BasisFlags.KTX2_OUTPUT | BasisFlags.SRGB,
+    rdo_quality=0.0
+)
+print("Compress result:", ok)
+
+# === Retrieve compressed blob ===
+ofs  = codec.get_comp_data_ofs(params)
+size = codec.get_comp_data_size(params)
+print("Output size =", size)
+
+comp_data = codec.read_bytes(ofs, size)
+print("First 16 bytes:", comp_data[:16])
+
+# === Save to KTX2 ===
+with open("test.ktx2", "wb") as f:
+    f.write(comp_data)
+
+print("File written: test.ktx2")
+
+# === Cleanup ===
+codec.delete_params(params)
+codec.free(img_ptr)