HDR Rendering

Release 0.10.0

STPRealism

• Introduce STPFrameBuffer and STPRenderBuffer as smart managed OpenGL objects.
• Add textureStorageMultisample() method is STPTexture.
• Add a new managed object STPSampler.
• Refactor STPTexture and extract functions which set texture parameters to a new interface class STPImageParameter. STPSampler also derives from this interface class.

STPPostProcessing

An off-screen renderer that captures rendering buffer from other renderers and process the buffer before drawing it onto the screen.

• Allow attaching multisampled texture.
• The shader provides the following functionalities:
  • HDR tone mapping, specifically it supports the following tone mapping functions:
    • Gran Turismo
    • Lottes
    • Uncharted2
  • Gamma correction.

Also enable HDR tone mapping and gamma correction in the demo program.

General fixes and improvement

• Update Catch2 to v3.0.0-preview4.
• Fix a few typos in the README document.
• Fix a bug for which GL reports invalid image format when unbindImage() is called in STPTexture.
• Replace std::shared_mutex with std::mutex in STPSingleHistogramFilter. Also eliminate unused function arguments.
• Improve shader source macro definition, add a helper class to convert other data type to string automatically.
• For the demo program, albedo texture are now corrected to linear space, default framebuffer has multisampling disabled.
• Change traverse() in STPScenePipeline to a template function and use bit flag to determine components to be rendered in compile time to avoid having a lot of branches in runtime.