srcIn blending with a solid color is frequent combination in Flutter applications:

The reason is that it lets you treat the input image as a mask, which is more or less what you want - and the other blend modes are really just a distrction.

• In the framework, Its the default blend of images when a color is specified
• Its the previous default and documented reasonable default for flutter_svg/vector_graphics
• Its, as far as I can tell, the only reasonable value to choose for blending in drawAtlas, especially and used by particle grids

Right now we need to do the blending in a subpass. Even with optimizations I've done, the wonderous paint texture background is still a very significant chunk (~30%) of GPU utilization, and additional raster thread overhead for the subpass due to existing inefficiencies.

If we do this optimization we should document that it is the fastest combination.