Martin Valigursky

Implement async read back of textures

6

We need a public API tp allow render target textures to be accessed by the CPU. Ideally this API would be async, allowing to take advantage of async API for...

Shader precision optimizations

1

Optimize shaders in the engine to use half precision when full float is not required, to optimize fragment shader performance. There's an unfinished PR related to this: https://github.com/playcanvas/engine/pull/2972 original ticket:...

Further SceneDepth refactoring / changes needed

1

A follow up for this could be done in the future: https://github.com/playcanvas/engine/pull/3132 Issues and possible solutions: 1. Internally requestDepthMap() is used to request depth texture, which enables the depth layer....

Implement progressive multi-frame rendering

6

The algorithm is described in GPU Pro 7, chapter 3.1 It allows for image quality to improve when the camera is static (and the scene is not animated) by accumulation...

Static lights not working after the scene reload

1

issue and a repro project: https://forum.playcanvas.com/t/issue-with-static-lights/19233/25

Implement cheaper shadow sampling

2

In current implementation, PCF3 is the cheapest available shadow sampling. For mobile, especially older devices, even cheaper filtering could be implemented. PCF2, and even possibly single tap sampling (which is...

Implement color correction

2

Details to be figured out, but based on something equivalent to 3D LUT texture. This could be done either inlined in the shaders, or as a post-processing.

Implement HDR rendering + postprocessing pipeline

7

PlayCanvas by default renders everything in LDR to 8888 targets. Lighting in the shader takes place in linear HDR space, and at the end of the standard shader we apply...

Investigate performance improvement by using invalidateFramebuffer

3

the WebGl2 function to be used: https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/invalidateFramebuffer see "When to call glInvalidateFramebuffer?" section here https://community.arm.com/developer/tools-software/graphics/b/blog/posts/mali-performance-2-how-to-correctly-handle-framebuffers see "Optimizing for tilers" section here: https://www.dropbox.com/s/89pvx9obhv6m0pk/High%20Quality,%20High%20Performance%20Graphics%20in%20Filament%20(Handout).pdf?dl=0 ` There are TWO MAJOR optimizations you MUST...

Investigate implementation of OffscreenCanvas API

11

Investigate implementation of https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas. This would give us: - possible additional performance for the application, as playcanvas part of the application including webgl would execute on separate thread - ability...