shaderWarmUp property

ShaderWarmUp shaderWarmUp
read / write

ShaderWarmUp to be executed during initInstances.

If the application has scenes that require the compilation of complex shaders that are not covered by DefaultShaderWarmUp, it may cause jank in the middle of an animation or interaction. In that case, set shaderWarmUp to a custom ShaderWarmUp before calling initInstances (usually before runApp for normal Flutter apps, and before enableFlutterDriverExtension for Flutter driver tests). Paint the scene in the custom ShaderWarmUp so Flutter can pre-compile and cache the shaders during startup. The warm up is only costly (100ms-200ms, depending on the shaders to compile) during the first run after the installation or a data wipe. The warm up does not block the main thread so there should be no "Application Not Responding" warning.

Currently the warm-up happens synchronously on the GPU thread which means the rendering of the first frame on the GPU thread will be postponed until the warm-up is finished.

See also:


static ShaderWarmUp shaderWarmUp = const DefaultShaderWarmUp()