Fixed Rgb9E5F decoding. Removed union cast in favor of bx::bitCast.

tests/pixelformat_test.cpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2024 Branimir Karadzic. All rights reserved.
+ * License: https://github.com/bkaradzic/bx/blob/master/LICENSE
+ */
+
+#include "test.h"
+#include <bx/pixelformat.h>
+
+TEST_CASE("pack/unpack Rgba8", "[pixelformat]")
+{
+	float rgba[4] = { 0.1f, 0.3f, 0.8f, 0.9f };
+	uint32_t encoded;
+	bx::packRgba8(&encoded, rgba);
+
+	float decoded[4];
+	bx::unpackRgba8(decoded, &encoded);
+
+	REQUIRE(bx::isEqual(rgba, decoded, 4, 0.01f) );
+}
+
+TEST_CASE("pack/unpack Rgb9E5F", "[pixelformat]")
+{
+	float rgba[3] = { 0.1f, 0.3f, 0.89f };
+	uint32_t encoded;
+	bx::packRgb9E5F(&encoded, rgba);
+
+	float decoded[3];
+	bx::unpackRgb9E5F(decoded, &encoded);
+
+	REQUIRE(bx::isEqual(rgba, decoded, BX_COUNTOF(rgba), 0.001f) );
+}