Compiled shader decode?

Hi all,

I've been reading the shader source of Unity3D, I found this code:

not public

Why there's such a decode algorithm, and what's the compiled shader source like, where and when the encoding operation is performed? I am a starter of the Untiy shader source, thank you in advance!

 

I found a piece of code in the generated compiled shader file after I imported a new shader to the unity editor:

"vs_4_0_level_9_1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"

I think this should be the compiled shader - a text way to express the binary bytecode.

 

I got the point of the issue - CompiledHLSL11.cpp of CgBatch, in the InvokeCompilerHLSL11 call:

not public

shaderCode is the compiled shader(bytecode), and the encodedShader is the text version, which will be decoded at runtime.

 

Hi Aras,

1. Our company bought the license with source code from Unity many years ago, so it is legal. Sorry to post snippets here, won't do it again.
2. Thank you for your explanation.

 

Hi povilas,

Sorry for that, because it really puzzled me and I wanted to know the truth. Please remove this thread if necessary.

 

@Twines Thank you for understanding that the source code posted on this thread is not public.

To remove the private source code from the public forum either (1) edit the post with the "Edit" link at the bottom of the post, or (2) delete the thread using the Thread Tools > Delete Thread menu command at the top of the thread.

 

Thank you nicholasr!