FloatImg class definition and some basic operations

tests/basics.py

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+from floatimg import FloatImg
+
+
+def test_create():
+    width = 640
+    height = 480
+    img = FloatImg.create(width, height, FloatImg.RGB)
+    assert img.width == width
+    assert img.height == height
+    assert img.type_id == FloatImg.RGB
+
+    img = FloatImg.create_rgb(width, height)
+
+    assert img.type_id == FloatImg.RGB
+    # TODO inspect RVB
+
+
+def test_clone():
+    width = 640
+    height = 480
+    img = FloatImg.create(width, height, FloatImg.RGB)
+    img2 = img.clone()
+    assert img.width == img2.width
+    assert img.height == img2.height
+    assert img.type_id == img2.type_id
+    # TODO inspect RVB and do pixel per pixel comparison
+
+
+def test_rgb_constant():
+    width = 5
+    height = 5
+    color = [127.0, 127.0, 127.0]
+    img = FloatImg.create_rgb(width, height)
+    img.rgb_constant(*color)
+    for y in range(height):
+        for x in range(width):
+            assert img.get_rgb(x, y) == color