2 files changed, 21 insertions, 1 deletions
diff --git a/include/cru/osx/graphics/quartz/Image.h b/include/cru/osx/graphics/quartz/Image.h
index 458f5db0..5b3aead9 100644
--- a/include/cru/osx/graphics/quartz/Image.h
+++ b/include/cru/osx/graphics/quartz/Image.h
@@ -9,7 +9,8 @@ namespace cru::platform::graphics::osx::quartz {
 class QuartzImage : public OsxQuartzResource, public virtual IImage {
  public:
   QuartzImage(IGraphicsFactory* graphics_factory, IImageFactory* image_factory,
-              CGImageRef image, bool auto_release);
+              CGImageRef image, bool auto_release,
+              unsigned char* buffer = nullptr);
 
   CRU_DELETE_COPY(QuartzImage)
   CRU_DELETE_MOVE(QuartzImage)
@@ -22,11 +23,15 @@ class QuartzImage : public OsxQuartzResource, public virtual IImage {
 
   std::unique_ptr<IImage> CreateWithRect(const Rect& rect) override;
 
+  std::unique_ptr<IPainter> CreatePainter() override;
+
   CGImageRef GetCGImage() const { return image_; }
 
  private:
   IImageFactory* image_factory_;
   CGImageRef image_;
   bool auto_release_ = false;
+
+  unsigned char* buffer_;
 };
 }  // namespace cru::platform::graphics::osx::quartz
diff --git a/include/cru/platform/graphics/Image.h b/include/cru/platform/graphics/Image.h
index 51e27678..17d2170e 100644
--- a/include/cru/platform/graphics/Image.h
+++ b/include/cru/platform/graphics/Image.h
@@ -6,5 +6,20 @@ struct CRU_PLATFORM_GRAPHICS_API IImage : public virtual IGraphicsResource {
   virtual float GetWidth() = 0;
   virtual float GetHeight() = 0;
   virtual std::unique_ptr<IImage> CreateWithRect(const Rect& rect) = 0;
+
+  /**
+   * \brief Create a painter for this image.
+   * \remarks Not all image could create a painter. If not this method will
+   * throw. Currently we only ensure images returned by
+   * IImageFactory::CreateBitmap or CloneToBitmap can create a painter.
+   */
+  virtual std::unique_ptr<IPainter> CreatePainter() = 0;
+
+  /**
+   * \brief Create a bitmap image with the same pixels as this image's.
+   * \remarks This method can be used to create a bitmap image, so you can draw
+   * on the new bitmap, if the original image can't be directly painted.
+   */
+  virtual std::unique_ptr<IImage> CloneToBitmap();
 };
 }  // namespace cru::platform::graphics