尝试解决插件bug

tests/gtest/plugin_renderer_readback_test.cpp

@@ -0,0 +1,19 @@
+#include <gtest/gtest.h>
+
+#include "render/plugin/pluginrenderer.h"
+
+TEST(PluginRendererReadback, BytesToPixels)
+{
+	olive::VideoParams params(16, 16, olive::core::PixelFormat::U8, 4,
+							  olive::core::rational(1, 1),
+							  olive::VideoParams::kInterlaceNone, 1);
+
+	const int bytes_per_pixel =
+		olive::VideoParams::GetBytesPerPixel(params.format(),
+											 params.channel_count());
+	ASSERT_EQ(bytes_per_pixel, 4);
+
+	EXPECT_EQ(olive::plugin::detail::BytesToPixels(64, params), 16);
+	EXPECT_EQ(olive::plugin::detail::BytesToPixels(0, params), 0);
+	EXPECT_EQ(olive::plugin::detail::BytesToPixels(-1, params), 0);
+}