From a41fbf75aff54f4d3bd88793cdf2bf281ea9ee01 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Thu, 14 Apr 2022 12:54:06 +0800
Subject: Add pixel and bitmap color depth conversion.

---
 test_bitmap.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 test_bitmap.cpp

(limited to 'test_bitmap.cpp')

diff --git a/test_bitmap.cpp b/test_bitmap.cpp
new file mode 100644
index 0000000..4f20d3f
--- /dev/null
+++ b/test_bitmap.cpp
@@ -0,0 +1,33 @@
+//
+// Created by Keuin on 2022/4/14.
+//
+
+#include <gtest/gtest.h>
+
+#include "bitmap.h"
+
+TEST(Pixel, PixelDepthConvert) {
+    const auto white8 = pixel8b::white();
+    const auto white32 = pixel<uint32_t>::white();
+    ASSERT_EQ(white8, pixel8b::from(white32));
+
+    const auto black8 = pixel8b::black();
+    const auto black32 = pixel<uint32_t>::black();
+    ASSERT_EQ(black8, pixel8b::from(black32));
+
+    const auto gray8 = pixel8b{127, 127, 127};
+    const auto gray32 = pixel<uint32_t>{
+            ((1ULL << 32U) - 1U) >> 1U,
+            ((1ULL << 32U) - 1U) >> 1U,
+            ((1ULL << 32U) - 1U) >> 1U
+    };
+    ASSERT_EQ(gray8, pixel8b::from(gray32));
+
+    const auto mix8 = pixel8b{0, 127, 255};
+    const auto mix32 = pixel<uint32_t>{
+            0,
+            ((1ULL << 32U) - 1U) >> 1U,
+            ((1ULL << 32U) - 1U)
+    };
+    ASSERT_EQ(mix8, pixel8b::from(mix32));
+}
\ No newline at end of file
-- 
cgit v1.2.3