...

2 files changed, 8 insertions, 0 deletions

diff --git a/include/cru/osx/graphics/quartz/ImageFactory.h b/include/cru/osx/graphics/quartz/ImageFactory.h
index e9854738..19e9c8c1 100644
--- a/include/cru/osx/graphics/quartz/ImageFactory.h
+++ b/include/cru/osx/graphics/quartz/ImageFactory.h
@@ -15,5 +15,6 @@ class QuartzImageFactory : public OsxQuartzResource,
 
  public:
   std::unique_ptr<IImage> DecodeFromStream(io::Stream* stream) override;
+  std::unique_ptr<IImage> CreateBitmap(int width, int height) override;
 };
 }  // namespace cru::platform::graphics::osx::quartz
diff --git a/include/cru/platform/graphics/ImageFactory.h b/include/cru/platform/graphics/ImageFactory.h
index 2a7902b2..e74f57e0 100644
--- a/include/cru/platform/graphics/ImageFactory.h
+++ b/include/cru/platform/graphics/ImageFactory.h
@@ -7,5 +7,12 @@ namespace cru::platform::graphics {
 struct CRU_PLATFORM_GRAPHICS_API IImageFactory
     : public virtual IGraphicsResource {
   virtual std::unique_ptr<IImage> DecodeFromStream(io::Stream* stream) = 0;
+
+  /**
+   * \brief Create an empty bitmap with given width and height.
+   * \remarks Implementation should ensure that the bitmap supports alpha
+   * channel. It had better be in 32-bit rgba format.
+   */
+  virtual std::unique_ptr<IImage> CreateBitmap(int width, int height) = 0;
 };
 }  // namespace cru::platform::graphics