Add PD::Image and add a setter for logfilter

include/pd/image/image.hpp

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <pd/core/core.hpp>
+
+namespace PD {
+class PD_API Image {
+ public:
+  enum class Format {
+    RGBA,    // bpp == 4
+    RGB,     // bpp == 3
+    RGB565,  // bpp == 2 (not supported in laoding)
+    BGR,     // bpp == 3
+    ABGR,    // bpp == 4
+    BGRA,    // bpp == 4
+  };
+  Image();
+  Image(const std::string& path);
+  Image(const std::vector<u8>& buf);
+  Image(const std::vector<u8>& pixels, int w, int h, int bpp = 4);
+  ~Image();
+
+  void Load(const std::string& path);
+  void Load(const std::vector<u8>& buf);
+  void Load(const u8* buf, size_t size);
+  void Copy(const std::vector<u8>& pixels, int w, int h, int bpp = 4);
+
+  const int& Width() const { return pSize.x; }
+  const int& Height() const { return pSize.x; }
+  const ivec2& Size() const { return pSize; }
+
+  const std::vector<u8>& data() const { return pData; }
+  std::vector<u8>& data() { return pData; }
+  operator const std::vector<u8>&() const { return pData; }
+  operator std::vector<u8>&() { return pData; }
+  operator const ivec2&() const { return pSize; }
+  operator const Format&() const { return pFormat; }
+
+  void Flip(bool horizontal = true, bool vertical = true);
+
+  static int Format2Bpp(Format fmt);
+  static Format GuessFmtFromBpp(int bpp);
+
+ private:
+  std::vector<u8> pData;
+  ivec2 pSize;
+  Format pFormat = Format::RGBA;
+};
+}  // namespace PD