tell me about cirawfilter

The CIRAWFilter is not explicitly mentioned in the provided context. However, the context does discuss various aspects of handling HDR images using Core Image (CI) filters and other related APIs. Here are some relevant points from the session "Use HDR for dynamic image experiences in your app":

1. HDR Concepts and Technologies:

   • The session covers the use of HDR images and the importance of tone mapping to ensure images look optimal across different displays.
   • It introduces new system tone mapping APIs to maintain consistency in image appearance.

2. Adaptive HDR:

   • Adaptive HDR files can be loaded as either SDR or HDR images, providing flexibility in how they are displayed.
   • The expand HDR option in CIImage is used to support the Apple gain map image format.

3. Read HDR Images:

   • The process of reading HDR images into memory is discussed, including the use of the expand HDR option to load adaptive HDR files.

4. Edit Strategies:

   • Different strategies for editing HDR images are explained, including the use of CI filters to preserve HDR range.
   • The importance of the content headroom property in HDR images is highlighted.

5. Display Tone Mapping:

   • The session explains how to tone map HDR images for display, considering both the image headroom and the display headroom.
   • New APIs for tone mapping are introduced to ensure images look great across different applications.

For more detailed information, you can refer to the session "Use HDR for dynamic image experiences in your app" at the following chapter markers:

• HDR concepts and technologies
• Adaptive HDR
• Read HDR images
• Edit strategies
• Display tone mapping

If you have any specific questions about CIRAWFilter or other related topics, feel free to ask!